CN110686405A - Device and method for using air for regenerative heating denitration pyrolysis furnace - Google Patents
Device and method for using air for regenerative heating denitration pyrolysis furnace Download PDFInfo
- Publication number
- CN110686405A CN110686405A CN201910733031.0A CN201910733031A CN110686405A CN 110686405 A CN110686405 A CN 110686405A CN 201910733031 A CN201910733031 A CN 201910733031A CN 110686405 A CN110686405 A CN 110686405A
- Authority
- CN
- China
- Prior art keywords
- steam
- grade
- air
- pyrolysis furnace
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 52
- 238000010438 heat treatment Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000005485 electric heating Methods 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000006392 deoxygenation reaction Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/06—Returning energy of steam, in exchanged form, to process, e.g. use of exhaust steam for drying solid fuel or plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a device for heating air for a denitration pyrolysis furnace by using regenerative heating, and relates to the field of power plants. The invention also discloses a method for heating air for the denitration pyrolysis furnace by using regenerative heating, which comprises the following steps of: 1. introducing primary air; 2. determining the flow of deoxygenated water supply; 3. introducing oxygen-removing feed water heat exchange; 4. outputting deoxygenated water supply and primary air; 5. determining the low-grade steam flow; 6. introducing low-grade steam for heat exchange; 7. outputting primary air; 8. determining the flow of high-grade steam; 9. introducing high-grade steam for heat exchange; 10. outputting primary air to the denitration pyrolysis furnace. The invention only uses the air for the regenerative heating denitration pyrolysis furnace, thereby reducing the energy consumption and the cost.
Description
Technical Field
The invention relates to the field of power plants, in particular to a device and a method for using air for a regenerative heating denitration pyrolysis furnace.
Background
The heating technology of the SCR denitration device of the power plant is divided into two main types according to the heat exchange mode: namely indirect heat exchange and direct heat exchange. The main representative techniques of indirect heat exchange are: rotary, tubular, heat pipe, steam heater, etc. The main representative techniques of direct heat exchange are: hot secondary air mixing heating, direct gas heating, hot air mixing heating and the like.
At present, urea used by an SCR denitration device of a power plant adopts a pyrolysis method, hot air of the urea is from a hot air side behind a primary air preheater and enters a pyrolysis furnace after being heated by a steam heater and an electric heating device, a large amount of fuel or electric energy is consumed, and the energy consumption is high.
Therefore, those skilled in the art are dedicated to develop a device and a method for using air for a regenerative heating denitration pyrolysis furnace, and a steam heater is used to replace an electric heating device, so that the high operation cost generated by the power consumption of the electric heating device is reduced, and the problem of high energy consumption under the prior art is solved.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to reduce energy consumption during heating the air for the denitration pyrolysis furnace, thereby reducing high operation cost generated by power consumption of the electric heating device.
In order to achieve the purpose, the invention provides a device for heating air for a denitration pyrolysis furnace by using regenerative heating, which comprises a deaerator, a No. 5 heat exchanger, a water diversion pipeline, a booster pump, a steam transmission pipeline, an A9 steam heater, a high-grade steam pipeline, an A6 steam heater, a low-grade steam pipeline, a steam turbine, a flow regulating valve, the denitration pyrolysis furnace, a bypass baffle and an electric heating device, wherein the deaerator is arranged in the water diversion pipeline; wherein, the No. 5 heat exchanger adopts a low-pressure heat exchanger; a circulation loop is formed among the deaerator, the No. 5 heat exchanger, the water conduit and the booster pump; the No. 5 heat exchanger, the A6 steam heater, the A9 steam heater and the denitration pyrolysis furnace are sequentially connected in series through the steam conveying pipeline.
Furthermore, the No. 5 heat exchanger is a No. 5 heat exchanger which numbers the heat exchanger according to the flow direction of the working medium.
Furthermore, the water conduit is connected with the deaerator and the No. 5 heat exchanger and used for conveying deaerated feed water and realizing circulation of deaerated feed water between the deaerator and the No. 5 heat exchanger.
Further, the A9 steam heater is a steam-air heater, and the hot primary air required by the process is obtained by utilizing the principle that the primary air is heated by heat exchange between high-grade steam and the primary air, and the temperature of the primary air is raised to 350 ℃.
Further, the A6 steam heater is a steam-air heater, and the cascade utilization of energy is realized by utilizing the principle that low-grade steam and primary air exchange heat to heat primary air.
Further, the steam turbine is configured to extract high grade steam to the A9 steam heater, while the steam turbine is simultaneously configured to extract low grade steam to the A6 steam heater.
Further, the pipe diameter of the water conduit is determined according to the flow of the deoxygenation water supply, the pipe wall thickness of the water conduit is determined according to the pressure of the deoxygenation water supply, and the water conduit and the steam transmission pipeline are made of the same material.
Further, the pipe diameter of the high-grade steam pipeline is determined according to the flow of high-grade steam, the pipe wall thickness of the high-grade steam pipeline is determined according to the pressure of the high-grade steam, and the high-grade steam pipeline and the steam transmission pipeline are made of the same material.
Further, the pipe diameter of the low-grade steam pipeline is determined according to the flow of low-grade steam, the pipe wall thickness of the low-grade steam pipeline is determined according to the pressure of the low-grade steam, and the low-grade steam pipeline and the steam transmission pipeline are made of the same material.
In order to achieve the purpose, the invention also provides a method for using air for the regenerative heating denitration pyrolysis furnace, which comprises the following main steps:
step 1, introducing primary air;
step 2, determining the flow of deoxygenated water supply;
step 3, introducing oxygen-removing water supply heat exchange;
step 4, outputting deoxygenated water supply and primary air;
step 6, introducing low-grade steam for heat exchange;
step 7, outputting primary air;
step 8, determining the flow of high-grade steam;
step 9, introducing high-grade steam for heat exchange;
and step 10, outputting primary air to the denitration pyrolysis furnace.
In a preferred embodiment of the invention, a circulation loop is formed among the deaerator, the heat exchanger No. 5, the water conduit and the booster pump, the water conduit is connected with the deaerator and the heat exchanger No. 5 and is used for conveying deaerated feed water, circulation of the deaerated feed water between the deaerator and the heat exchanger No. 5 is realized, the heat exchanger No. 5 is used for heating air for the denitration pyrolysis furnace, the air flows back to the deaerator after heat exchange, and the energy is saved compared with the energy-saving heating method by using electric heating or the mixed heating of regenerative heating and electric heating; and the deaerated feed water led out from the deaerator outlet is used as a heating medium to exchange heat with primary air, so that the deaerator has a lower grade of high-grade steam extracted by the steam turbine and a better energy-saving effect compared with the heating of low-grade steam extracted by the steam turbine.
In another preferred embodiment of the present invention, the present invention provides a device and a method for heating air for a denitration pyrolysis furnace by using a regenerative heater, which are improved from the structure of the existing air system of the denitration pyrolysis furnace in a conventional power plant, and do not need to use an electric heating device or a combination device of regenerative heating and electric heating; the invention adopts indirect heat exchange technology, is realized by the prior art, and can adopt the combination of different devices such as hot primary air or hot secondary air, an electric heating device and the like according to the difference of device installation devices; the invention adopts the steam-air heater, primary air does not need to flow through the rotary air preheater, and the air used by the denitration pyrolysis furnace can avoid fly ash carried by the rotary air preheater.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic structural view of an air system for a conventional denitration pyrolysis furnace, which is an apparatus for regeneratively heating air for a denitration pyrolysis furnace according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an air system for a denitration pyrolysis furnace for reforming the device for backheating and heating air for the denitration pyrolysis furnace according to a preferred embodiment of the invention;
fig. 3 is a flowchart illustrating the operation of the method for using the wind for the regenerative heating denitration pyrolysis furnace according to a preferred embodiment of the present invention.
The system comprises a deaerator 1, a heat exchanger 2-5, a water guide pipeline 3, a booster pump 4, a steam transmission pipeline 5, a steam heater 6-A9, a high-grade steam pipeline 7, a steam heater 8-A6, a low-grade steam pipeline 9, a steam turbine 10, a flow regulating valve 11, a denitration pyrolysis furnace 12, a bypass baffle 13, an electric heating device 14 and a rotary air preheater 15.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
As shown in fig. 1, the conventional denitration pyrolysis furnace in the conventional power plant uses a wind structure arrangement, and according to the difference of the equipment installation device, a combination of different equipment such as a hot primary wind or a hot secondary wind and an electric heating device is generally adopted.
As shown in fig. 2, the device for heating air for a denitration pyrolysis furnace by using regenerative heating comprises a deaerator 1, a heat exchanger No. 5 2, a water conduit 3, a booster pump 4, a steam delivery conduit 5, an a9 steam heater 6, a high-grade steam conduit 7, an a6 steam heater 8, a low-grade steam conduit 9, a steam turbine 10, a flow control valve 11, a denitration pyrolysis furnace 12, a bypass baffle 13 and an electric heating device 14. Wherein, the No. 5 heat exchanger 2 adopts a low-pressure heat exchanger; a circulation loop is formed among the deaerator 1, the heat exchanger 2 No. 5, the water conduit 3 and the booster pump 4, and the heat exchanger 2 No. 5, the steam heater 8A 6, the steam heater 6A 9 and the denitration pyrolysis furnace 12 are sequentially connected in series through the steam conduit 5.
As shown in fig. 1 and 2, fig. 2 is based on the structure of the air system for the existing denitration pyrolysis furnace in fig. 1, and other heating measures are not needed, a water conduit 3 is added on an outlet pipeline of a deaerator 1 to serve as a branch pipeline, deaerated water supply is introduced into a heat exchanger 2 No. 5, a heat exchange process of deaerated water supply and cold primary air is carried out in the heat exchanger 2 No. 5, the cold primary air is heated to a required temperature, deaerated water supply after heat exchange is pumped back to the deaerator 1 through a booster pump 4, and the circular flow of the deaerated water supply and the heating process of the cold primary air are completed.
As shown in fig. 2, in order to reach the hot air temperature required by the denitration pyrolysis furnace process and further increase the primary air temperature, an a9 steam heater 6 is additionally arranged on the steam transmission pipeline 5 behind the No. 5 heat exchanger, high-grade steam extracted by a steam turbine 10 is introduced into the a9 steam heater 6 through a high-grade steam pipeline 7, heat exchange between the high-grade steam and the primary air is performed in the a9 steam heater 6, and the primary air is further heated to the hot air temperature required by the pyrolysis furnace process. In order to reduce the usage amount of high-grade steam extracted by the steam turbine 10, an A6 steam heater 8 is arranged between the No. 5 heat exchanger 2 and the A9 steam heater 6, low-grade steam extracted by the steam turbine 10 is introduced into the A6 steam heater 8 through a low-grade steam pipeline 9, and heat exchange between the low-grade steam and primary air is carried out in the A6 steam heater 8, so that the loss amount of the high-grade steam is reduced, and the cascade utilization of energy is realized.
As shown in fig. 2, the pipe diameter of the water conduit 3 at the outlet of the deaerator 1 is selected according to the flow of deaerated water supply led out by the deaerator 1, the pipe wall thickness of the water conduit 3 is selected according to the pressure of deaerated water supply, and the material of the water conduit 3 is the same as that of the steam transmission pipeline 5. The diversion pipeline 3 is provided with a flow regulating valve 11 for regulating the flow of the deoxygenated water supply, the flow regulating valve 11 is selected to be matched with the diversion pipeline 3, and a proper booster pump 4 is selected according to the flow of the deoxygenated water supply. In a circulation loop consisting of a deaerator 1, a No. 5 heat exchanger 2, a water conduit 3, a flow regulating valve 11 and a booster pump 4, the joints are all welded.
As shown in fig. 2, the pipe diameter of the high-grade steam pipe 7 is selected according to the flow rate of high-grade steam extracted by the steam turbine 10, and the pipe diameter of the low-grade steam pipe 9 is selected according to the flow rate of low-grade steam extracted by the steam turbine 10; selecting the pipe wall thickness of the high-grade steam pipeline 7 according to the pressure of the high-grade steam, and selecting the pipe wall thickness of the low-grade steam pipeline 9 according to the pressure of the low-grade steam; the material selection of the high-grade steam pipeline 7 and the low-grade steam pipeline 9 is the same as that of the steam transmission pipeline 5. A flow regulating valve 11 is arranged on the high-grade steam pipeline 7 and used for regulating the flow of the high-grade steam, and the flow regulating valve 11 is selected to be matched with the high-grade steam pipeline 7; a flow regulating valve 11 is arranged on the low-grade steam pipeline 9 and used for regulating the flow of the low-grade steam, and the flow regulating valve 11 is selected to be matched with the low-grade steam pipeline 9. In the connection relation formed by the No. 5 heat exchanger 2, the A6 steam heater 8, the A9 steam heater 6 and the steam turbine 10, the connection parts are all welded.
As shown in fig. 2, a bypass baffle 13 is additionally arranged on the steam delivery pipeline 5 between the a9 steam heater 6 and the denitration pyrolysis furnace 12, the bypass baffle 13 is connected in parallel with the electric heating device 14 in the original system structure, and after the bypass baffle 13 is communicated, the electric heating device 14 can be withdrawn for operation, so that the energy consumption of the electric heating device 14 in the system is reduced. The primary air in the original system structure is heated to the temperature required by the denitration pyrolysis furnace process after passing through the indirect heat exchange process of the No. 5 heat exchanger 2, the A6 steam heater 8 and the A9 steam heater 6 in sequence, and is directly conveyed into the denitration pyrolysis furnace 12 through the steam conveying pipeline 5, so that the primary air does not need to pass through the rotary air preheater 15 in the original system structure, and the air for the denitration pyrolysis furnace 12 is ensured to avoid fly ash carried by the rotary air preheater 15.
As shown in fig. 2 and 3, a method for using regenerative heating to denitrate air for a pyrolysis furnace includes the following steps:
step S101: introducing primary air at 40 ℃ to be heated from a fan heater of an original system to a No. 5 heat exchanger 2;
step S102: calculating the heat absorption capacity required by the primary air according to the temperature rise of the required primary air, determining the flow of the deoxygenated feed water introduced to the No. 5 heat exchanger 2 by combining the temperature drop of the deoxygenated feed water, and taking the deoxygenated feed water as a heating medium;
step S103: introducing the deoxygenated feed water into a No. 5 heat exchanger 2 from a deoxygenator 1 to perform heat exchange between the deoxygenated feed water and primary air, and lifting the primary air from 40 ℃ to 140-170 ℃;
step S104: the primary air after heat exchange is conveyed to an A6 steam heater 8, and the deoxygenated feed water after heat exchange is led out to the deoxygenator 1 again;
step S105: calculating the heat absorption capacity required by the primary air according to the temperature rise of the required primary air, and determining the flow of low-grade steam introduced to the A6 steam heater 8 by combining the temperature drop of the extracted low-grade steam, wherein the low-grade steam is superheated or supersaturated steam;
step S106: introducing low-grade steam into an A6 steam heater from a steam turbine 10 to perform heat exchange between the low-grade steam and primary air;
step S107: delivering the heat exchanged primary air to an a9 steam heater 6;
step S108: calculating the heat absorption capacity required by the primary air according to the temperature rise of the required primary air, and determining the flow of high-grade steam introduced to the A9 steam heater 6 by combining the temperature drop of the extracted high-grade steam, wherein the high-grade steam is superheated or supersaturated steam;
step S109: introducing high-grade steam into an A9 steam heater from a steam turbine 10 to perform heat exchange between the high-grade steam and primary air;
step S110: and (3) conveying the primary air subjected to heat exchange to the denitration pyrolysis furnace 12 to enable the outlet air temperature of the denitration pyrolysis furnace 12 to be 360-380 ℃, and completing the process of heating the air for the denitration pyrolysis furnace by using regenerative heating.
It is further explained that the denitration pyrolysis furnace 12 is formed by modifying the structure of the existing denitration pyrolysis furnace 12 air system of a conventional power plant, an indirect heat exchange technology is adopted, the denitration pyrolysis furnace is realized through the existing process, and the combination of different equipment such as hot primary air or hot secondary air, an electric heating device and the like can be adopted according to different equipment installation devices. The invention is also suitable for other heating method hot air systems. The technical method provided by the invention can be applied to all occasions needing hot air with a certain temperature. The invention does not make specific provisions on the valves of the system, and users can set isolation valves and regulating valves according to requirements.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A device for heating air for a denitration pyrolysis furnace by using regenerative heating is characterized by comprising a deaerator, a No. 5 heat exchanger, a water diversion pipeline, a booster pump, a steam delivery pipeline, an A9 steam heater, a high-grade steam pipeline, an A6 steam heater, a low-grade steam pipeline, a steam turbine, a flow regulating valve, the denitration pyrolysis furnace, a bypass baffle and an electric heating device; wherein, the No. 5 heat exchanger adopts a low-pressure heat exchanger; a circulation loop is formed among the deaerator, the No. 5 heat exchanger, the water conduit and the booster pump; the No. 5 heat exchanger, the A6 steam heater, the A9 steam heater and the denitration pyrolysis furnace are sequentially connected in series through the steam conveying pipeline.
2. The device for backheating and heating air for the denitration pyrolysis furnace as claimed in claim 1, wherein the No. 5 heat exchanger is a No. 5 heat exchanger which numbers the heat exchanger according to the flow direction of the working medium.
3. The device for using air for the regenerative heating denitration pyrolysis furnace as claimed in claim 1, wherein the water conduit is connected with the deaerator and the heat exchanger No. 5 and is used for conveying deaerated feed water to realize circulation of the deaerated feed water between the deaerator and the heat exchanger No. 5.
4. The apparatus according to claim 1, wherein the A9 steam heater is a steam-air heater, and the primary air is heated by exchanging heat between high-grade steam and the primary air to obtain hot primary air required by the process, and the temperature of the primary air is raised to 350 ℃.
5. The apparatus according to claim 1, wherein the a6 steam heater is a steam-air heater, and the energy gradient utilization is realized by using the principle of heating primary air by exchanging heat between low-grade steam and primary air.
6. The apparatus for regeneratively heating denitrified pyrolysis furnace air using as claimed in claim 1, wherein said steam turbine is configured to extract high grade steam to said a9 steam heater and said steam turbine is simultaneously configured to extract low grade steam to said a6 steam heater.
7. The apparatus according to claim 1, wherein the diameter of the water conduit is determined according to the flow rate of the deoxygenated water supply, the thickness of the wall of the water conduit is determined according to the pressure of the deoxygenated water supply, and the material of the water conduit is the same as that of the steam conduit.
8. The apparatus according to claim 1, wherein the diameter of the high-grade steam pipe is determined according to the flow rate of high-grade steam, the thickness of the pipe wall of the high-grade steam pipe is determined according to the pressure of the high-grade steam, and the high-grade steam pipe and the steam transmission pipe are made of the same material.
9. The apparatus according to claim 1, wherein the diameter of the low-grade steam pipe is determined according to the flow rate of low-grade steam, the thickness of the pipe wall of the low-grade steam pipe is determined according to the pressure of the low-grade steam, and the low-grade steam pipe and the steam delivery pipe are made of the same material.
10. A method for using regenerative heating denitration pyrolysis furnace air is characterized by comprising the following main steps:
step 1, introducing primary air;
step 2, determining the flow of deoxygenated water supply;
step 3, introducing oxygen-removing water supply heat exchange;
step 4, outputting deoxygenated water supply and primary air;
step 5, determining the low-grade steam flow;
step 6, introducing low-grade steam for heat exchange;
step 7, outputting primary air;
step 8, determining the flow of high-grade steam;
step 9, introducing high-grade steam for heat exchange;
and step 10, outputting primary air to the denitration pyrolysis furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910733031.0A CN110686405A (en) | 2019-08-09 | 2019-08-09 | Device and method for using air for regenerative heating denitration pyrolysis furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910733031.0A CN110686405A (en) | 2019-08-09 | 2019-08-09 | Device and method for using air for regenerative heating denitration pyrolysis furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110686405A true CN110686405A (en) | 2020-01-14 |
Family
ID=69108259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910733031.0A Pending CN110686405A (en) | 2019-08-09 | 2019-08-09 | Device and method for using air for regenerative heating denitration pyrolysis furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110686405A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101055073A (en) * | 2007-06-05 | 2007-10-17 | 湖南大学 | Discrete low grade residue heat recovery boiler high temperature water-supply and air preheater system |
| CN103398369A (en) * | 2013-08-05 | 2013-11-20 | 吕克庆 | Method and system for comprehensive utilization of tail heat of boiler |
| CN105737129A (en) * | 2016-04-13 | 2016-07-06 | 华北电力大学 | Comprehensive waste heat utilization system for deep optimization of primary air preheating process |
| CN205606530U (en) * | 2016-04-21 | 2016-09-28 | 西安热工研究院有限公司 | Wind waste heat high level of heat utilizes system |
| CN106370034A (en) * | 2016-08-30 | 2017-02-01 | 哈尔滨锅炉厂有限责任公司 | Flue gas heat exchange system for urea pyrolysis |
| CN106524127A (en) * | 2016-11-27 | 2017-03-22 | 冯伟忠 | Steam cooler system and method for decreasing steam-extraction superheat degree of steam cooler system |
| CN107036073A (en) * | 2017-05-11 | 2017-08-11 | 博瑞特热能设备股份有限公司 | Boiler circulatory system |
| CN107366897A (en) * | 2017-07-05 | 2017-11-21 | 国网山东省电力公司电力科学研究院 | A kind of Pollutant in Coal Burning Boiler emission reduction optimization collaboration fume afterheat deep exploitation system |
| CN107883369A (en) * | 2017-11-30 | 2018-04-06 | 华电电力科学研究院 | Adapt to the boiler feedwater step heating system and adjusting method of the wide load denitration of unit |
| CN210569198U (en) * | 2019-08-09 | 2020-05-19 | 上海外高桥第三发电有限责任公司 | Device for heating air for denitration pyrolysis furnace by using regenerative heating |
-
2019
- 2019-08-09 CN CN201910733031.0A patent/CN110686405A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101055073A (en) * | 2007-06-05 | 2007-10-17 | 湖南大学 | Discrete low grade residue heat recovery boiler high temperature water-supply and air preheater system |
| CN103398369A (en) * | 2013-08-05 | 2013-11-20 | 吕克庆 | Method and system for comprehensive utilization of tail heat of boiler |
| CN105737129A (en) * | 2016-04-13 | 2016-07-06 | 华北电力大学 | Comprehensive waste heat utilization system for deep optimization of primary air preheating process |
| CN205606530U (en) * | 2016-04-21 | 2016-09-28 | 西安热工研究院有限公司 | Wind waste heat high level of heat utilizes system |
| CN106370034A (en) * | 2016-08-30 | 2017-02-01 | 哈尔滨锅炉厂有限责任公司 | Flue gas heat exchange system for urea pyrolysis |
| CN106524127A (en) * | 2016-11-27 | 2017-03-22 | 冯伟忠 | Steam cooler system and method for decreasing steam-extraction superheat degree of steam cooler system |
| CN107036073A (en) * | 2017-05-11 | 2017-08-11 | 博瑞特热能设备股份有限公司 | Boiler circulatory system |
| CN107366897A (en) * | 2017-07-05 | 2017-11-21 | 国网山东省电力公司电力科学研究院 | A kind of Pollutant in Coal Burning Boiler emission reduction optimization collaboration fume afterheat deep exploitation system |
| CN107883369A (en) * | 2017-11-30 | 2018-04-06 | 华电电力科学研究院 | Adapt to the boiler feedwater step heating system and adjusting method of the wide load denitration of unit |
| CN210569198U (en) * | 2019-08-09 | 2020-05-19 | 上海外高桥第三发电有限责任公司 | Device for heating air for denitration pyrolysis furnace by using regenerative heating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105737129B (en) | The synthesis afterheat utilizing system of First air warm depth optimization | |
| CN102840573A (en) | Water replenishing preheating system of thermal power plant | |
| CN203099962U (en) | Circulating-water direct heating system of thermal power plant | |
| CN103776016A (en) | Startup and shutdown system applicable to reactor comprising once-through steam generator | |
| CN210569198U (en) | Device for heating air for denitration pyrolysis furnace by using regenerative heating | |
| CN207194970U (en) | It is a kind of based on the high pressure combining heating system for taking out back of the body machine and flue gas reheat technology | |
| CN204987895U (en) | Take sintering waste heat power generation facility of external overheated after burning | |
| CN207196593U (en) | It is a kind of based on the high pressure combining heating system for taking out back of the body machine technology | |
| CN110686405A (en) | Device and method for using air for regenerative heating denitration pyrolysis furnace | |
| CN204611734U (en) | Fume afterheat utilizes closed circulation system | |
| CN203488273U (en) | Small-scale gas electrical generation waste heat utilization device | |
| CN202141035U (en) | Water supplementing and preheating device of thermal power plant | |
| CN216950586U (en) | Natural gas preheating system by using residual heat of residual boiler | |
| CN101906636B (en) | Method for heating titanium strip rinsing liquid by using microwave heater | |
| CN212319668U (en) | Steam generation system for solar photo-thermal power station | |
| CN203962062U (en) | The ammoniacal liquor power circulation system that a kind of working medium concentration is adjustable | |
| CN204829289U (en) | Steam subtracts warm depressurized system | |
| CN103090360A (en) | Energy recovery method of thermal power plant heat regenerative system | |
| CN107355268A (en) | A kind of coal unit is provided multiple forms of energy to complement each other control system and method | |
| CN207033511U (en) | A kind of coal unit is provided multiple forms of energy to complement each other control system | |
| CN202947115U (en) | Start-stop system adopting direct current vapor generator reactor | |
| CN209325762U (en) | The efficiently low product recuperation of heat of power plant utilizes system | |
| CN112197257B (en) | Steam generator comprehensive experiment system based on coal-fired power plant | |
| CN111023237B (en) | Fluid medium heating system based on solid heat storage electric boiler | |
| CN211119383U (en) | Indirect steam coupling system of incinerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |