WO2014046393A1 - Combustion gas condensation device having sulfur oxide removing function - Google Patents

Abstract

The present invention relates to a combustion gas condensation device which has functions of lowering the temperature of a combustion gas in a pure oxygen charcoal combustion facility while condensing the combustion gas, and then removing sulfur oxide therefrom.

Description

Combustion gas condenser with sulfur oxide removal

The present invention relates to a combustion gas condenser equipped with a sulfur oxide removal function, and more particularly, to a combustion gas condenser equipped with a sulfur oxide removal function after lowering a temperature while condensing combustion gas in a pure oxygen coal combustion plant. will be.

In coal-fired power plants, coal is pulverized into fine particles, and the pulverized coal powder is burned in a boiler. Pulverizer or Mill is an equipment that crushes coal into fine coals suitable for combustion. Coal pulverized by the pulverizer is injected into a boiler. The boiler is injected with air or pure oxygen and crushed coal to burn coal and discharge combustion gas (or exhaust gas). When pure oxygen is injected into the boiler, the combustion gases consist mainly of carbon dioxide and water vapor and contain sulfur oxides. In such a combustion system, combustion gas is recycled and supplied to the boiler or burner along with oxygen, and sulfur oxides are recycled and concentrated, and sulfur oxides remaining in the combustion gas easily cause mechanical damage to the combustion system.

An object of the present invention devised to solve the above problems, is equipped with a sulfur oxide removal function that can effectively remove the sulfur oxides from the combustion gas in the pure oxygen coal-fired power generation equipment to improve the utilization efficiency of the combustion gas used for recycling. It is to provide a combustion gas condensation device.

According to an embodiment of the present invention, a combustion gas condenser equipped with a sulfur oxide removal function for recirculating combustion gas of a pure oxygen coal combustion power generation system, when the combustion gas generated in the boiler of the power generation system is injected, cooling water for condensation A condenser for condensing the combustion gas using the condenser and lowering the temperature of the combustion gas to a temperature within a predetermined range; And a scrubber that receives the combustion gas whose temperature is lowered from the condenser and removes sulfur oxides included in the combustion gas by using washing water.

The condenser may include a condenser main body into which the combustion gas is injected and lowered; A condensing coolant storage tank installed outside the condenser main body and storing the condensing cooling water; And one end connected to the condensation cooling water storage tank, and the other end connected to the condenser body, and the condensing cooling water supply pipe configured to supply and circulate the condensing cooling water stored in the condensation cooling water storage tank to the inside of the condenser body. Can be.

The condenser may include a condenser main body into which the combustion gas is injected and lowered; And a condensation cooling water supply pipe configured to supply and circulate seawater as the condensation cooling water into the condenser body.

The condenser may further include a condenser sprayer installed at an upper portion of the condenser body to spray condensed water generated by condensation of the combustion gas to a lower portion of the condenser body.

The scrubber may include: a scrubber body in which the combustion gas whose temperature is lowered flowing from the condenser body rises; And a scrubber spray tube for spraying the scrubbing water to the lower portion of the scrubber body while the inlet combustion gas is lifted from the scrubber body to remove sulfur oxides of the inlet combustion gas.

The washing machine is installed outside the washing machine main body, the washing coolant storage tank for storing the cooling water for washing; And a washing coolant supply pipe having one end connected to the washing coolant storage tank and the other end connected to the scrubber main body for supplying and circulating the washing cooling water stored in the washing coolant storage tank to the inside of the scrubber body. And, the cooling water supply pipe for cleaning may be installed above the cleaner spray pipe.

The scrubber may further include a washing coolant supply pipe configured to supply and circulate seawater as the washing coolant into the inside of the scrubber main body, wherein the washing coolant supply pipe may be installed above the scrubber spray tube.

The condensate generated in the condenser and the integrated storage tank for storing the washing water; further comprising, the scrubber may use the condensed water stored in the integrated storage tank as the washing water.

And a neutralizer for neutralizing the condensed water stored in the integrated reservoir using a neutralizing agent, wherein the scrubber may use the neutralized condensed water as the washing water.

The neutralizer may include a pH sensor configured to sense a hydrogen ion concentration (pH, pH) of condensate stored in the integrated storage tank; A neutralizer supply unit for supplying a neutralizing agent variably according to the sensed pH; A mixing tank for neutralizing and storing the condensate by mixing a portion of the condensate stored in the integrated storage tank with the supplied neutralizer; And a pump for pumping the neutralized condensed water to the cleaner.

A temporary storage tank for temporarily storing the condensed water or the washing water stored in the integrated storage tank; A level sensor for sensing the level of condensate or washing water stored in the temporary storage tank; And a discharge pipe configured to discharge the condensed water or the washing water stored in the temporary storage tank when the sensed water level reaches a predetermined maximum water level.

According to an embodiment of the present invention, after lowering the temperature of the pure oxygen coal combustion gas by using condensed water, the sulfur oxide can be more effectively removed by removing the sulfur oxide from the combustion gas by using the washing water.

In addition, according to an embodiment of the present invention, after neutralizing the washing water used to remove the sulfur oxides from the combustion gas, the sulfur oxides can be more effectively removed by using the neutralized washing water.

In addition, according to an embodiment of the present invention, by lowering the temperature of the combustion gas from which sulfur oxides have been removed by using cooling water or sea water, the efficiency of the combustion gas being recycled to the grinding machine can be increased.

1 is a view showing a pure oxygen coal combustion system accompanied with a combustion gas recirculation according to an embodiment of the present invention,

2 is a view showing a first condensation apparatus (condensation and washing using fresh water) according to a first embodiment of the present invention;

3 is a view showing a second condensation apparatus (cooling and condensation using seawater) according to a second embodiment of the present invention;

4 is a view showing a third condensation apparatus (cleaning and condensation neutralization using condensate) according to a third embodiment of the present invention;

5 is a view showing a fourth condensing device (condensed water discharge device) according to a fourth embodiment of the present invention, and

FIG. 6 is a view showing a fifth condensing device (condensing / cleaning pure oxygen coal combustion gas using fresh water and neutralizing condensate) according to a fifth embodiment of the present invention.

* Detailed description of the major symbols in the drawings *

500: fifth condenser 510: fifth condenser

511: fifth condenser main body 512: fifth condensing coolant reservoir

513: fifth condensing cooling water supply pipe 514: ninth pump

515: fifth condenser spray tube 520: fifth integral reservoir

530: second neutralizer 531: second mixing tank

532: fifth water level sensor 533: tenth pump

534: sixth level sensor 535: second pH sensor

536: 11th pump 537: second neutralizing agent supply

540: fifth washing machine 541: fifth temperature control cooling water storage tank

542: 12th pump 543: 5th cleaner spray tube

544: cooling water supply pipe for the fifth temperature control 550: second discharger

551: third discharge pipe 552: second temporary storage tank

553: seventh water level sensor 554: eighth water level sensor

555: 13th pump 556: 4th discharge pipe

557: first discharge water reservoir 558: first valve

Objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the present invention to those skilled in the art.

In the present specification, when a component is mentioned as being on another component, it means that it may be formed directly on the other component or a third component may be interposed therebetween. In addition, in the drawings, the thickness of the components are exaggerated for the effective description of the technical content.

Where the terms first, second, etc. are used herein to describe the components, these components should not be limited by these terms. These terms are only used to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the words 'comprises' and / or 'comprising' do not exclude the presence or addition of one or more other components.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In describing the specific embodiments below, various specific details are set forth in order to explain the invention more specifically and to help understand. However, those skilled in the art can understand that the present invention can be used without these various specific details. In some cases, it is mentioned in advance that parts of the invention which are commonly known in the description of the invention and which are not highly related to the invention are not described in order to prevent confusion in explaining the invention without cause.

1 is a diagram illustrating a oxy-fuel coal combustion system accompanied with a combustion gas recirculation according to an embodiment of the present invention.

The pure oxygen coal combustion system according to the embodiment of the present invention shown in FIG. 1 more effectively removes sulfur oxides of the flue gas generated in the boiler to improve the quality of the recycled flue gas, and consequently the equipment in the pure oxygen coal combustion system. The failure of can be minimized. Recycled combustion gases, ie inert gases, are gases produced by the combustion of coal in a coal combustion system, for example carbon dioxide (CO2).

To this end, the coal combustion system illustrated in FIG. 1 includes an air separator unit (ASU) 10, a differentiator 20, a burner 30, a boiler 40, a dust collector 50, and a heat exchanger 60. , Condenser 70, stack or carbon dioxide recovery (CPU) 80, and controller 90.

Air separator (10), differentiator (20), burner (30), boiler (40), dust collector (50), heat exchanger (60), condenser (70), stack or carbon dioxide recovery (80) delivers gas The pipes are connected to each other, and a description of the pipes is omitted in FIG.

The air separator 10 separates pure oxygen from the injected air and supplies it to the burner 30.

The pulverizer 20 receives coal stored in a coal reservoir (not shown) to pulverize coal to generate coal powder (that is, pulverized coal), and deliver the generated pulverized coal to the burner 30. While the coal is pulverized, the pulverized powder 20 is made of a pulverized coal flow atmosphere identical to that of air by a mixed gas of recycled combustion gas mainly composed of carbon dioxide and oxygen supplied from the air separator 10, so that coal is dried and transferred to the burner, Supplied.

The burner 30 receives the pulverized coal and pure oxygen from the pulverizer 20, burns it, and supplies heat to the boiler 40. Combustion gases emitted include harmful substances including carbon dioxide, water vapor and sulfur oxides.

The furnace desulfurization apparatus 45 is a device for primarily removing sulfur oxides generated in a combustion chamber in a furnace, and means a device for injecting a chemical such as limestone that adsorbs sulfur oxides in powder form or wet slurry form.

The dust collector 50 collects foreign substances such as dust in the combustion gas discharged from the boiler 40 and delivers the combustion gas from which the dust is removed to the heat exchanger 60.

In the heat exchanger (60), the temperature of the combustion gas discharged from the dust collector (50) is lowered to a temperature suitable for inflow of the condenser (70) by using the low temperature combustion gas recycled.

In this way, the heat of the combustion gas is transferred to the fluid supplied to the combustion chamber without being discarded as it is, and there is an effect of increasing energy efficiency.

The condenser 70 removes water from the combustion gas by condensing heat from the combustion gas received from the heat exchanger 60, and secondly removes sulfur oxides contained in the combustion gas through a cleaning operation. have. The flue gas is recycled in the oxy-fuel coal combustion system to act as nitrogen in the air. When the recycle combustion gas contains a lot of water, the drying efficiency of the coal powder is reduced in the fine powder 20, and coal powder and water may form a slurry and adhere to the pipe, thereby inhibiting the transport of coal. Should be lowered below a certain level. In addition, when sulfur oxides are included in the combustion gas, equipment failure of the pulverization or the combustion system as well as the piping may occur, and the combustion efficiency may be lowered in this process. The exhaust gas supplied to the condenser 70 includes carbon dioxide, sulfur oxides and moisture. Therefore, the condenser 70 distributes moisture and combustion gas from which sulfur oxides are secondarily removed to the stack or the carbon dioxide recovery device 80 and the powder 20. Various embodiments of the condenser 70 will be described in detail with reference to FIGS. 2 to 6.

The stack or carbon dioxide recovery device 80 refers to a central processing unit facility that collects carbon dioxide through a stack or a compression process that discharges filtered combustion gas to outside.

The controller 90 may control the operation of each facility based on signals received from each facility of the coal combustion system. In FIG. 1, only signals received from the condenser 70 according to the embodiment of the present invention are illustrated, but it is obvious to those skilled in the art.

The differentiator 20 receives the gas of the main component of carbon dioxide whose recycled combustion gas received from the condenser 70, that is, moisture and sulfur oxides are removed to minimize the concentration of sulfur oxides, and transports coal to the burner.

The gas / gas heat exchanger 95 preheats the air before supplying the air to the combustion chamber of the boiler 40 and also preheats the air in order to dry and smoothly transport the coal in a coal mill (not shown) of the mill 20. 20).

Hereinafter, the first to fifth condensing devices 100, 200, 300, 400, and 500 will be described with reference to FIGS. 2 to 6, and the first to sixth condensing devices 100, 200, 300, and 400 are described. , 500 is one of various embodiments of the condenser 70 described with reference to FIG. 1.

2 is a view showing a first condensation apparatus 100 according to the first embodiment of the present invention.

The first condensation apparatus 100 illustrated in FIG. 2 is a device capable of condensation and washing using fresh water, and includes a first condenser 110, a first integrated storage tank 120, and a first cleaner 130. The first condenser 110, the first integrated storage tank 120, and the first cleaner 130 may be formed in one piece, and for convenience of description, separate areas are described for each role.

When the combustion gas generated in the boiler 40 of the coal combustion system in the power generation system is injected, the first condenser 110 may lower the temperature of the combustion gas to a temperature within a predetermined range while condensing the combustion gas by using condensation cooling water. . To this end, the first condenser 110 is the first condenser body 111, the first condensing coolant reservoir 112, the first condensing coolant supply pipe 113, the first pump 114 and the first condensate spray pipe 115.

The first condenser body 111 receives the combustion gas from the heat exchanger 60, and may have a structure such that the injected combustion gas temperature is lowered to the lower portion of the first condenser body 111. The first condenser body 111 may be provided with a first condensate cooling water supply pipe 113 and a first condensed water spray tube 115.

The first condensing coolant storage tank 112 is installed outside the first condenser main body 111 and discharges heat of the circulating coolant and supplies the stored cooling water to the first condenser main body 111. Can be. The first condensing coolant reservoir 112 may be used as a condensing coolant chiller and a reservoir.

The first condensing coolant supply pipe 113 has one end connected to the first condensing coolant reservoir 112 and the other end connected to the first condenser main body 111 to condense stored in the first condensing coolant reservoir 112. It serves to supply the cooling water for the inside of the first condenser body (111). Since the first condensing coolant supply pipe 113 is installed to circulate the inside of the first condenser main body 111, the coolant is formed inside the first condenser main body 111 along the first condensing coolant supply pipe 113. It can act as a heat exchanger to lower the temperature of the combustion gas falling while circulating. By the cooling water, the combustion gas discharges moisture contained in the combustion gas, and the discharged water (hereinafter, referred to as 'condensation water') is obtained through the first integrated storage tank 120.

The first condenser spray tube 115 is installed on the upper part of the first condenser main body 111 or the upper part of the first condensing cooling water supply pipe 113, and reuses the condensed water generated by condensation of the combustion gas. Spray to the bottom of 111. That is, one end of the first condenser spray tube 115 is connected to the first integrated reservoir 120, and pumped condensate stored in the first integrated reservoir 120 using the first pump 114, the first Spray through a plurality of nozzles (125a) in the upper portion of the condenser body 111. The sprayed condensate forms a liquid film on the surface of the heat exchanger connected to the cooling water supply pipe 113 to facilitate heat transfer between the cooling water and the combustion gas. The heat radiation effect of the combustion gas is increased by the condensed water sprayed. For example, when the temperature of the injected combustion gas is 90 ° C. to 100 ° C., the combustion gas may be lowered to about 40 ° C. by the circulating cooling water and the sprayed condensate.

The first integrated storage tank 120 stores the condensed water generated by heat exchange in the first condenser body 111. In addition, the first integrated storage tank 120 stores the washing water used in the first cleaner main body 131. Therefore, the condensed water or the washing water stored in the first integrated storage tank 120 may be the same water, and in the following, the condensed water and the washing water are sometimes mixed for convenience of description. The condensate or washing water stored in the first integrated reservoir 120 may be recycled and repeatedly used in the first condenser 110 or the first cleaner 130.

The first cleaner 130 may receive the combustion gas whose temperature is lowered from the first condenser 110 to remove sulfur oxides contained in the combustion gas by using washing water. In particular, the first cleaner 130 uses the condensed water stored in the first integrated storage tank 120 as the washing water. To this end, the first cleaner 130 includes a first cleaner body 131, a first cleaner spray tube 132, a first temperature control coolant reservoir 133, and a first temperature control coolant supply pipe 134.

The first cleaner main body 131 receives the combustion gas whose temperature is lowered by the condensation from the first condenser main body 111. The first cleaner main body 131 and the first condenser main body 111 have a passage connected to each other at the bottom. The first cleaner main body 131 has a structure in which the combustion gas flowing into the lower portion through the passage rises and discharges to the upper portion of the first cleaner main body 131.

The first cleaner spray pipe 132 may spray sulfuric acid under the first cleaner body 131 to remove sulfur oxides of the combustion gas while the introduced flue gas rises from the first cleaner body 131. have. The first cleaner spray tube 132 may use the condensed water stored in the first integrated reservoir 120 as the washing water or may receive the washing water from the outside. In addition, the washing water sprayed from the first cleaner spray tube 132 may be obtained by the first integrated reservoir 120 and reused as the washing water.

The first temperature control cooling water storage tank 133 is installed outside the first cleaner main body 131, stores the cooling water in order to control the temperature of the finally discharged combustion gas, and stores the stored cooling water as the first cleaner main body 131. It may be a cooling tower to supply. If the temperature of the combustion gas in the first condenser 110 is not sufficiently lowered in the heat exchanger ( identification number 60 or 95 of FIG. 1 or other heat exchanger not shown) of the first temperature control cooling water reservoir 113 is lowered.

One end of the first washing coolant supply pipe 134 is connected to the first washing coolant reservoir 133, and the other end of the first washing coolant supply tube 134 is stored in the first washing coolant reservoir 133. The cooling water is circulated inside the first cleaner body 131. To this end, the first washing coolant supply pipe 134 is installed to circulate inside the first cleaner main body 131. In addition, the first cleaning coolant supply pipe 134 may be installed above the first cleaner spray pipe 132. Thus, the sulfur oxides of the combustion gas flowing from the first condenser 110 is removed by the washing water sprayed from the first cleaner spray tube 132, the combustion gas from which the sulfur oxides are removed is the first cleaning coolant supply pipe ( The temperature is lowered by the cooling water of 134 and then discharged as recycled combustion gas.

3 is a view showing a second condensation apparatus 200 according to the second embodiment of the present invention.

The second condensation apparatus 200 shown in FIG. 3 is a device capable of cooling and condensing using seawater, and includes a second condenser 210, a second integrated storage tank 220, and a second cleaner 230. The second condenser 210, the second integrated reservoir 220, and the second cleaner 230 may be integrally formed.

The second condenser 210 includes a second condenser body 211, a second condensing coolant supply pipe 212, a second pump 213, and a second condenser spray tube 214.

The second cleaner 230 includes a second cleaner body 231, a second cleaner spray tube 232, and a second washing coolant supply pipe 233.

The second condenser 210, the second integrated reservoir 220, and the second cleaner 230 are structured and operated with the first condenser 110, the first integrated reservoir 120, and the first cleaner 130 of FIG. 1. Since this is similar or identical, detailed description is omitted.

However, the difference between the second condenser 200 and the first condenser 100 is that the first condenser 100 lowers the temperature of the combustion gas and generates condensed water by using fresh water stored in the cooling tower, and the first cleaner 130. ) Again to lower the temperature of the combustion gas and discharge it.

On the other hand, the second condenser 200 generates condensate by lowering the temperature of the combustion gas using seawater, and lowers the temperature of the combustion gas again in the second cleaner 230. That is, the second condensing cooling water supply pipe 213 supplies sea water as the condensing cooling water to the inside of the second condenser main body 221 and circulates it. In addition, the second temperature control cooling water supply pipe 212 may supply sea water as the cooling water for control to the inside of the second cleaner main body 211 to circulate the water.

4 is a view showing a third condensation device 300 according to the third embodiment of the present invention.

The third condenser 300 shown in FIG. 4 is a device capable of cleaning with condensate and neutralizing the condensate, and includes a third condenser 310, a third integrated storage tank 320, a first neutralizer 330, and a third cleaner. 340. The third condenser 310, the third integrated reservoir 320, and the third cleaner 340 may be integrally formed. In addition, the third condenser 310, the third integrated reservoir 320, and the third cleaner 340 may include the first condenser 110, the first integrated reservoir 120, and the first cleaner 140 described with reference to FIG. 2. ) And the detailed description is omitted.

However, the first neutralizer 330 may neutralize the condensed water stored in the third integrated storage tank 320 using a neutralizing agent. Therefore, the third cleaner 340 may use the neutralized condensed water as the washing water. For example, the first neutralizer 330 may neutralize the condensate to have a concentration of about 6.5 pH. This is because there is a limit in removing sulfur oxides when the washing water is acidic.

The first neutralizer 330 includes a first mixing tank 331, a first water level sensor 332, a fourth pump 333, a second water level sensor 334, and a first pH (pH, hydrogen ion concentration) sensor 335 ), A fifth pump 336 and a first neutralizing agent supply unit 337.

The first mixing tank 331 stores the washing water stored in the third integrated storage tank 320.

The first water level sensor 332 continuously or periodically senses the level of the washing water stored in the first mixing tank 331, and transmits the sensing result to the controller 90. When the controller 90 determines that the level of the first mixing tank 331 is lowered to the A level by analyzing the sensing result, the controller 90 drives the fourth pump 333 to receive the washing water stored in the third integrated storage tank 320. Can be controlled. Accordingly, the fourth pump 333 pumps the washing water stored in the third integrated storage tank 320, and thus the washing water pumped to the first mixing tank 331 is transferred.

The second water level sensor 334 senses whether the washing water stored in the first mixing tank 331 has reached the B level, and transmits the sensing result to the controller 90. When the controller 90 determines that the water level of the first mixing tank 331 is raised to the B level by analyzing the sensing result, the controller 90 may control the driving of the fourth pump 333 to stop the pumping operation.

The first pH sensor 335 periodically senses the pH of the washing water stored in the third integrated reservoir 320, and transmits the sensing result to the controller 90. The controller 90 analyzes the sensing result and, when the hydrogen ion concentration (ie, the concentration of sulfur oxides) of the washing water is lower than a preset reference due to the increase of the sulfur oxides, the first neutralizing agent supply unit 337 to supply the neutralizing agent. Can be controlled.

The first neutralizing agent supply unit 337 may supply the neutralizing agent to the first mixing tank 331 according to the sensed pH based on the control of the controller 90. The first neutralizing agent supply unit 337 supplies the neutralizing agent to the first mixing tank 331 to the extent that the hydrogen ion concentration of the washing water can be neutralized to a predetermined concentration. At this time, the fifth pump 336 may pump the neutralizing agent stored in the first neutralizing agent supply unit 337 and deliver the neutralizing agent to the first mixing tank 331. Thus, the first mixing tank 331 mixes the condensed water (or the wash water) and the neutralizing agent to neutralize the condensed water and stores the neutralized condensed water.

When the water level of the first mixing tank 331 reaches the B level, and the washing water stored in the first mixing tank 331 is neutralized, the controller 90 sets the neutralized washing water stored in the first mixing tank 331. It can be processed to be supplied to the three washing machine (340).

The third cleaner 340 may receive the neutralized washing water stored in the first mixing tank 331, and the neutralized washing water supplied to the third cleaner 340 may be used to remove sulfur oxides in the combustion gas. have.

The third cleaner 340 receives the neutralized washing water from the first neutralizer 330 and sprays it, thereby removing sulfur oxides contained in the combustion gas whose temperature is lowered from the third condenser 310. . To this end, the third cleaner 340 includes a third cleaner body 341, a sixth pump 342, a third cleaner spray tube 343, and a third washing coolant supply pipe 344.

The third cleaner main body 341 receives the combustion gas whose temperature is lowered by the condensation from the third condenser main body 311. The combustion gas is introduced into the third cleaner main body 341 and the third condenser main body 311 through a passage connected to each other provided at a lower portion thereof, and then rises and is discharged to an upper portion of the third cleaner main body 341.

The third cleaner spray tube 343 sprays neutralized washing water to the lower portion of the third cleaner body 341 while removing the sulfur oxides of the combustion gas while the introduced flue gas rises from the third cleaner body 341. can do. The washing water sprayed from the third washing machine spray tube 343 may be obtained by being neutralized by the third integrated storage tank 320 and reused as the washing water.

The third washing coolant supply pipe 344 receives the cooling water or the seawater stored in the cooling tower (not shown) and supplies the cooling water to the inside of the third cleaner main body 341, thereby rising to the upper part of the third cleaner main body 341. The temperature of the combustion gas (ie the combustion gas from which sulfur oxides have been removed) is lowered. Combustion gas maintained at an appropriate temperature state is discharged through an outlet provided at the upper end of the third cleaner main body 341 and flows into the fine powder 20 or the stack or carbon dioxide recovery device 80.

5 is a view showing a fourth condensing apparatus 400 according to the fourth embodiment of the present invention.

The fourth condenser 400 shown in FIG. 5 is a condensate discharge device, and includes a fourth condenser 410, a fourth integrated reservoir 420, a fourth cleaner 430, and a first discharger 440. The fourth condenser 410, the fourth integrated reservoir 420, and the fourth cleaner 430 may be integrally formed. In addition, the fourth condenser 410, the fourth integrated reservoir 420, and the fourth cleaner 430 may include the third condenser 310, the third integrated reservoir 320, and the third cleaner 340 described with reference to FIG. 4. ) And the detailed description is omitted.

However, the first discharger 440 prevents the discharge of the combustion gas through the condensate outlet while maintaining the C level of the condensate stored in the fourth integrated reservoir 420, and discharges the condensate stored in the fourth integrated reservoir 420. do. To this end, the first discharge 440 is the first discharge pipe 441, the first temporary reservoir 442, the third level sensor 443, the fourth level sensor 444, the eighth pump 445, the second The discharge pipe 446, the first discharge water reservoir 447 and the first valve 448.

When the condensate stored in the fourth integrated reservoir 420 reaches a predefined C level, the condensed water stored in the fourth integrated reservoir 420 is discharged through the first outlet 420a. The first discharge pipe 441 transfers the condensed water discharged through the first discharge port 420a to the first temporary storage tank 442. The first outlet 420a is provided on the sidewall of the fourth integrated storage tank 420 and has a structure to automatically discharge the condensed water when reaching the C level. A '-' shaped gas barrier is attached to the condensate outlet to allow only condensate to be discharged.

The first temporary storage tank 442 temporarily receives the condensed water stored in the fourth integrated storage tank 420.

The third level sensor 443 senses the level of the condensate stored in the first temporary reservoir 442 and transmits the sensing result to the controller 90. When the controller 90 analyzes the sensing result and determines that the level of the condensate stored in the first temporary reservoir 442 reaches the D level, the controller 90 stores the condensate stored in the first temporary reservoir 442 externally or in the first discharge water reservoir. The eighth pump 445 is controlled to discharge to 447.

The fourth water level sensor 444 periodically senses the level of condensate stored in the first temporary reservoir 442, and transmits the sensing result to the controller 90. The controller 90 analyzes the sensing result and controls the eighth pump 445 to stop the pumping operation when it is determined that the level of the condensate stored in the first temporary storage tank 442 reaches the D level. As a result, the level of condensate stored in the first temporary storage tank 442 is maintained at the minimum E level.

The eighth pump 445 discharges the condensed water stored in the first temporary storage tank 442 by pumping under the control of the controller 90. Therefore, when the water level sensed by the third water level sensor 443 reaches a predetermined maximum water level (that is, the D level), the condensed water flowing out by the eighth pump 445 passes through the second discharge pipe 446. The first discharge water reservoir 447 is delivered.

6 is a view showing a fifth condensation device 500 according to the fifth embodiment of the present invention.

The fifth condenser 500 shown in FIG. 6 is a device capable of condensing / cleaning the pure oxygen coal combustion gas using fresh water and neutralizing the condensate. The fifth condenser 510, the fifth integrated storage tank 520, and the second neutralizer 530, a fifth cleaner 540, and a second discharger 550. The fifth condenser 510, the fifth integrated reservoir 520, and the fifth cleaner 540 may be integrally formed.

When the combustion gas generated in the boiler 40 is injected, the fifth condenser 510 may lower the temperature of the combustion gas to a temperature within a predetermined range while condensing the combustion gas using the cooling water for condensation. To this end, the fifth condenser 510 is the fifth condenser body 511, the fifth condensing coolant reservoir 512, the fifth condensing coolant supply pipe 513, the ninth pump 514 and the fifth condenser spray pipe 515. Since the structure and operation of the fifth condenser 510 are the same as or similar to the first condenser 110 or the second condenser 210, a detailed description thereof will be omitted for convenience of description.

The fifth condenser body 511 may receive a primary cooling combustion gas from the heat exchanger 60, and may have a structure such that the injected combustion gas descends to the lower portion of the fifth condenser body 511. The fifth condenser body 511 may include a fifth condenser cooling water supply pipe 513 and a fifth condenser spray tube 515.

The fifth condensing coolant reservoir 512 stores the coolant to be delivered to the fifth condensing coolant supply pipe 513.

The fifth condensing cooling water supply pipe 513 receives the cooling water or the seawater stored in the fifth condensing cooling water storage tank 512 and supplies it into the fifth condenser body 511. Since the fifth condensing coolant supply pipe 513 is installed to circulate the inside of the fifth condenser main body 511, the coolant is formed inside the fifth condenser main body 511 along the fifth condensing coolant supply pipe 513. Circulating lowers the temperature of the combustion gases. The condensed water discharged from the combustion gas by the cooling water falls into the fifth integrated storage tank 520 and is stored.

The fifth condenser spray tube 515 may be installed at an upper portion of the fifth condenser main body 511 to inject condensate from the fifth integrated storage tank 520 to spray the lower portion of the fifth condenser main body 511. To this end, the ninth pump 514 connected to the fifth condenser spray tube 515 may pump the condensed water stored in the fifth integrated reservoir 520 to provide the fifth condenser spray tube 515. The condensate sprayed promotes heat transfer between the combustion gas and the heat exchange tube connected to the fifth condensation cooling water supply pipe 513, thereby increasing the cooling effect of the combustion gas.

The fifth integrated reservoir 520 stores the condensed water generated by the heat exchange in the fifth condenser body 511. In addition, the fifth integrated reservoir 520 stores the washing water used in the fifth cleaner 540. The condensate or washing water stored in the fifth integrated reservoir 520 may be recycled and repeatedly used in the fifth condenser 510 or the fifth cleaner 540.

The second neutralizer 530 may neutralize the condensed water stored in the fifth integrated reservoir 520 using a neutralizing agent. Therefore, the fifth cleaner 540 may use the neutralized condensed water as the washing water.

The second neutralizer 530 may include a second mixing tank 531, a fifth water level sensor 532, a tenth pump 533, a sixth water level sensor 534, a second pH sensor 535, and an eleventh pump 536. ) And a second neutralizing agent supply portion 537. The second mixing tank 531 stores the washing water stored in the fifth integrated storage tank 520.

The fifth water level sensor 532 continuously or periodically senses the level of the washing water stored in the second mixing tank 531, and transmits the sensing result to the controller 90. When the controller 90 determines that the level of the second mixing tank 531 is lowered to the A level by analyzing the sensing result, the controller 90 drives the tenth pump 533 to receive the washing water stored in the fifth integrated tank 520. Can be controlled. Accordingly, the tenth pump 533 pumps the washing water stored in the fifth integrated tank 520, and thus the washing water pumped to the second mixing tank 531 is transferred.

The sixth water level sensor 534 senses whether the washing water stored in the second mixing tank 531 reaches the B level, and transmits the sensing result to the controller 90. When the controller 90 determines that the level of the second mixing tank 531 is raised to the B level by analyzing the sensing result, the controller 90 may control the driving of the tenth pump 533 to stop the pumping operation.

The second pH sensor 535 periodically senses the pH of the washing water stored in the fifth integrated reservoir 520 and transmits the sensing result to the controller 90. The controller 90 may analyze the sensing result and control the second neutralizing agent supply unit 537 to supply a neutralizing agent when the hydrogen ion concentration of the washing water (that is, the concentration of sulfur oxide) is higher than a preset reference.

The second neutralizing agent supply unit 537 may supply the neutralizing agent to the second mixing tank 531 according to the sensed pH based on the control of the controller 90. The second neutralizing agent supply unit 537 supplies the neutralizing agent to the second mixing tank 531 such that the hydrogen ion concentration of the washing water can be neutralized to a predetermined concentration. At this time, the eleventh pump 536 may pump the neutralizing agent stored in the second neutralizing agent supply unit 537 and deliver the neutralizing agent to the second mixing tank 531. As a result, the second mixing tank 531 mixes the condensed water (or the wash water) and the neutralizing agent to neutralize the condensed water and stores the neutralized condensate.

When the water level of the second mixing tank 531 reaches the B level, and the washing water stored in the second mixing tank 531 is neutralized, the controller 90 sets the neutralized washing water stored in the second mixing tank 531. The driving of the twelfth pump 542 may be controlled to be supplied to the five cleaners 540.

The fifth cleaner 540 may be supplied with neutralized washing water stored in the second mixing tank 531, and the neutralized washing water supplied to the fifth cleaner 540 may be used to remove sulfur oxides in the combustion gas. have.

The fifth cleaner 540 is sprayed by receiving the neutralized washing water from the second neutralizer 530, thereby removing sulfur oxides contained in the combustion gas lowered from the fifth condenser 510. . To this end, the fifth cleaner 540 includes a fifth temperature control cooling water storage tank 541, a twelfth pump 542, a fifth cleaner spray tube 543, and a fifth temperature control cooling water supply pipe 544.

The fifth cleaner 540 receives the combustion gas whose temperature is lowered by the condensation from the fifth condenser body 511. The combustion gas is introduced through the passages connected to each other provided under the fifth condenser main body 511 and the fifth cleaner main body 540, and then rises and discharges to the upper portion of the fifth cleaner 540.

The twelfth pump 542 performs a pumping operation to supply the neutralized washing water stored in the second mixing tank 531 to the fifth cleaner spray tube 543, and the washing water stored in the second mixing tank 531 The pump can be pumped under the control of the controller 90 until the water level reaches the A level.

The fifth cleaner spray tube 543 sprays neutralized washing water to the lower part of the fifth cleaner body 541 while the introduced flue gas rises from the fifth cleaner body 541 to remove sulfur oxides of the combustion gas. can do. The washing water sprayed from the fifth washing machine spray tube 543 is obtained into the fifth integrated storage tank 520 and reused as the washing water.

The fifth temperature control cooling water supply pipe 544 is installed to circulate the upper part of the fifth cleaner 540 by receiving the cooling water or the seawater stored in the fifth temperature control cooling water storage tank 541, that is, the fifth cleaner main body. While circulating the upper portion of 541, the temperature of the combustion gas (ie, combustion gas from which sulfur oxides have been removed) is lowered. The combustion gas whose temperature is lowered is discharged through an outlet provided at the upper end of the fifth cleaner main body 540 and introduced into the fine powder 20 or the stack or carbon dioxide recovery device 80.

When the level of the condensate stored in the fifth integrated reservoir 520 reaches the C level, the second discharger 550 discharges the condensed water stored in the fifth integrated reservoir 520. To this end, the second discharge 550 is the third discharge pipe 551, the second temporary reservoir 552, the seventh level sensor 553, the eighth level sensor 554, the thirteenth pump 555, the fourth The discharge pipe 556, the first discharge water reservoir 557 and the first valve 558.

When the condensate stored in the fifth integrated reservoir 520 reaches a predefined C level, the condensed water stored in the fifth integrated reservoir 520 is discharged through the second outlet 520a. The third discharge pipe 551 transfers the condensed water discharged through the second discharge port 520a to the second temporary storage tank 552. The second outlet 520a is provided on the sidewall of the fifth integrated reservoir 520 and has a structure to automatically discharge the condensed water when reaching the C level. The second temporary storage tank 552 temporarily receives the condensed water stored in the fifth integrated storage tank 520.

The seventh water level sensor 553 senses the level of the condensate stored in the second temporary reservoir 552 and transmits the sensing result to the controller 90. When the controller 90 analyzes the sensing result and determines that the level of the condensate stored in the second temporary reservoir 552 reaches the D level, the controller 90 discharges the condensate stored in the second temporary reservoir 552 to the outside or the second level. The thirteenth pump 555 is controlled to discharge to the discharge water storage tank 557.

The eighth water level sensor 554 periodically senses the level of condensate stored in the second temporary storage tank 552, and transmits the sensing result to the controller 90. The controller 90 analyzes the sensing result and controls the thirteenth pump 555 to stop the pumping operation when it is determined that the level of the condensate stored in the second temporary reservoir 552 reaches the E level. As a result, the level of the condensate stored in the second temporary storage tank 552 maintains the minimum E level.

The thirteenth pump 555 discharges the condensed water stored in the second temporary reservoir 552 by pumping under the control of the controller 90. Therefore, when the water level sensed by the seventh water level sensor 553 reaches a predetermined maximum water level (that is, the D level), the condensed water flowing out by the thirteenth pump 555 passes through the fourth discharge pipe 556. It is delivered to the second discharge water reservoir 557 or the seabed.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

The present invention can provide a combustion gas condensation apparatus equipped with a sulfur oxide removal function that can effectively remove sulfur oxides from combustion gases in a pure oxygen coal-fired power generation facility and improve the utilization efficiency of the combustion gases used for recycling. It may be useful in the field of gas condenser.

Claims (11)

1. In the combustion gas condenser equipped with sulfur oxide removal function for recirculating combustion gas of pure oxygen coal-fired power generation system

   A condenser that receives the combustion gas generated in the power generation system and lowers the temperature of the combustion gas to a temperature within a predetermined range while condensing the injected combustion gas with cooling water for condensation; And

   Combustion gas condensation with a sulfur oxide removal function comprising a; a scrubber receiving the combustion gas is lowered temperature from the condenser, and removes the sulfur oxide contained in the received combustion gas using the washing water; Device.
2. The method of claim 1,

   The condenser,

   A cylindrical condenser body receiving the combustion gas;

   A condensing coolant storage tank installed outside the condenser main body and storing the condensing cooling water; And

   One end is connected to the condensation cooling water storage tank, and the other end is connected to the condenser body, and a condensation cooling water supply pipe for supplying and circulating the condensing cooling water stored in the condensation cooling water storage tank to the inside of the condenser body; Combustion gas condenser with sulfur oxide removal.
3. The method of claim 1,

   The condenser,

   A cylindrical condenser body receiving the combustion gas; And

   And a condensation cooling water supply pipe for supplying and circulating seawater as the condensation cooling water to the inside of the condenser main body.
4. The method according to claim 2 or 3,

   The condenser,

   The sulfur oxide removal function further comprises a; a condenser spraying tube installed at an upper portion of the inside of the condenser body and spraying condensate generated by condensation of the combustion gas to a lower portion of the inside of the condenser body. Flue gas condenser.
5. The method of claim 1,

   The washing machine,

   A scrubber body in which the combustion gas lowered in temperature flowing from the condenser body rises;

   And a scrubber spray tube for spraying the scrubbing water to the lower portion of the inside of the scrubber body to remove sulfur oxides of the scum combusted gas while the inlet combustion gas rises from the scrubber body. Combustion gas condenser with sulfur oxide removal function.
6. The method of claim 5,

   The washing machine,

   A cooling water storage tank installed outside the cleaner body to store the cooling water for cleaning; And

   One end is connected to the washing coolant reservoir, the other end is connected to the scrubber body, the washing coolant supply pipe for supplying and circulating the washing coolant stored in the washing coolant reservoir to the inside of the scrubber body; ,

   The cleaning water supply pipe for cleaning the combustion gas condensation device is equipped with a sulfur oxide removal function, characterized in that installed above the cleaner spray pipe.
7. The method of claim 5,

   The washing machine,

   And a cooling water supply pipe for supplying and circulating seawater as the cleaning cooling water to the inside of the cleaner body.

   The cleaning water supply pipe for cleaning the combustion gas condensation device is equipped with a sulfur oxide removal function, characterized in that installed above the cleaner spray pipe.
8. The method according to any one of claims 1, 2, 3, 5, 6 and 7,

   It further comprises an integrated reservoir for storing the condensate and the washing water generated in the condenser,

   And the scrubber uses the condensed water stored in the integrated reservoir as the scrubbing water.
9. The method of claim 8,

   And a neutralizer for neutralizing the condensed water stored in the integrated reservoir using a neutralizing agent.

   And said scrubber uses said neutralized condensed water as said scrubbing water.
10. The method of claim 9,

    The neutralizer,

    A pH sensor for sensing hydrogen ion concentration (pH, pH) of the condensate stored in the integrated reservoir;

    A neutralizer supply unit for supplying a neutralizing agent variably according to the sensed pH;

    A mixing tank for neutralizing and storing the condensate by mixing a portion of the condensate stored in the integrated storage tank with the supplied neutralizer; And

    And a pump for pumping the neutralized condensed water and delivering the neutralized condensate to the scrubber.
11. The method of claim 8,

    A temporary storage tank for temporarily storing the condensed water or the washing water stored in the integrated storage tank;

    A level sensor for sensing the level of condensate or washing water stored in the temporary storage tank; And

    And a discharge tube for discharging the condensed water or the washing water stored in the temporary storage tank when the sensed water level reaches a predetermined maximum water level.

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