KR102175549B1 - Multi-stage exhaust gas treatment process system having means to reduce odor, white smoke in exhaust gas after tenter and means for recovery of highly viscous pollutants - Google Patents

Abstract

The present invention relates to a multi-stage exhaust gas treatment process system having a means for reducing odor and white smoke in exhaust gas after a tenter and a means for recovering highly viscous pollutants having an energy saving effect and an odor removal effect, and more specifically, to a multi-stage exhaust gas treatment process system having a means for reducing odor and white smoke in exhaust gas after a tenter and a means for recovering highly viscous pollutants, comprising: a first heat exchanger; a cyclone scrubber; a washing water tank; a chemical supply tank; a condensation heat exchanger; a water separator; an electric dust collector; a second heat exchanger; a blower; an exhaust tower; a plurality of sensors; and a control unit.

Description

Multi-stage exhaust gas treatment process system having means to reduce odor, white smoke in exhaust gas after tenter, and means to reduce odor and white smoke and recover high-viscosity pollutants and means for recovery of highly viscous pollutants}

The present invention relates to a multistage exhaust gas treatment process system having a means for reducing odor and white smoke in exhaust gas after a tenter, and a means for recovering highly viscous pollutants, and in particular, gaseous pollutants contained in exhaust gas discharged from the rear end of a tenter, Exhaust after tenter that collects and removes organic solvents, particulate pollutants such as hair and brush, and also recovers and reuses heat from high-temperature exhaust gas, and reduces the temperature of exhaust gas discharged to the outside to reduce white smoke generation. It relates to a multi-stage exhaust gas treatment process system having a means for reducing gaseous odor and white smoke, and a means for recovering highly viscous pollutants.

In general, the tenter (TENTER) is also called a bomber, and is a device used as an ironing machine in industrial facilities in the dyeing industry.

The tenter as described above is regulated as an air pollutant emission facility and a facility subject to life odor regulation in accordance with the Air Environment Conservation Act, and air pollution prevention facilities must be provided.

There were cases in which only granular activated carbon adsorption tower was installed as an air pollution prevention facility of such tenter, but this is the result of not considering the adsorption capacity of activated carbon according to temperature. Due to the nature of activated carbon, substances are normally contained in activated carbon. The temperature that can be adsorbed is less than 40~50℃. In the exhaust gas discharged at 120~170℃, which is the average temperature of the exhaust gas discharged from the tenter, pollutants are not adsorbed to the activated carbon and activated carbon due to the high temperature exhaust gas. There is a danger of being fired.

In addition, it can be seen that it is very difficult to remove odor-causing substances and the like from the exhaust gas of the tenter discharged at high temperature only with activated carbon.

On the other hand, as a technology that improved the initial tenter air pollution prevention facility as described above, a technology in which a wet cleaning facility was added to the granular activated carbon adsorption tower to lower the temperature of the exhaust gas has been developed. In addition, due to the difficulty of regeneration and replacement work and cost issues, there are many cases of operating as it is for more than two years without replacement of activated carbon, and in recent years, there is a trend of installing an integrated tower type prevention facility in which an adsorption tower is integrally formed with wet cleaning. to be.

At this time, the integrated tower type prevention facility formed integrally as described above has the advantages of low installation cost and good appearance, but moisture and high viscosity pollutants such as oil mist and foreign substances such as falling hair and brushing are attached to the activated carbon, causing blockage. In addition to the frequent cases, oil mist was attached to ducts in addition to cleaning and adsorption facilities, causing contamination and causing fire.

As shown in the precedent as above, most of the pollution prevention facilities were put into operation only initially after investing a large amount of money to install the environmental pollution prevention facilities in the relevant company, and then died due to mechanical, facility, or management problems. There were many problems in its practicality because continuous management was not performed.

On the other hand, in order to solve the above problems, there is Registration Patent Publication No. 10-1854113, which is a technology filed and determined by the present applicant, but a large amount of electricity is required to evaporate the exhaust gas through a warmer. The efficiency of collecting and removing them is high, but there is a problem in that maintenance and management costs are high.

1. Korean Registered Patent Publication No. 10-1489190 2. Korean Patent Publication No. 10-1854113

The present invention is invented to solve the problems of the prior art as described above, and easily collects gaseous pollutants, organic solvents, particulate pollutants such as falling hair and brushing, etc., contained in exhaust gas discharged from the rear end of the tenter. In addition to removing the heat from the high-temperature exhaust gas, it recovers and reuses heat, and reduces the temperature of the exhaust gas discharged to the outside to reduce the generation of white smoke. An object thereof is to provide a multistage exhaust gas treatment process system having a means for recovering viscous pollutants.

In order to achieve the above object, the present invention provides a first heat exchanger connected to the rear end of the tenter to receive high-temperature exhaust gas and heat exchange while recovering waste heat, and exhaust gas passing through the first heat exchanger. A cyclone scrubber that removes particulate matter, gaseous substances, and organic solvents contained in the gas, and washing water including foreign matters disposed under the cyclone scrubber and discharged to the lower portion of the cyclone scrubber is supplied to the inside and washing water is supplied to the inside. A washing water tank supplied to the cyclone scrubber, and a plurality of units separated from the washing water tank are provided, and a chemical supply tank that is supplied to the inside of the washing water tank by introducing different chemicals for removing non-aqueous gaseous substances inside each, A condensation heat exchanger connected to one side of the first heat exchanger to receive the exhaust gas that has passed through the cyclone scrubber to the inside and to recover waste heat of the exhaust gas and condense moisture contained in the exhaust gas through heat exchange, and a condensation heat exchanger. A water separator connected between the first heat exchanger to receive exhaust gas from the condensation heat exchanger and to separate and remove moisture in the exhaust gas to supply it to the inside of the first heat exchanger, and a plurality of units on the other side of the first heat exchanger. Electricity that is provided in multiple stages and passes through the inside of the first heat exchanger, receives the heated exhaust gas inside, and recovers particulate matter, gaseous substances, and organic solvents contained in the exhaust gas by an electric dust collection method by corona discharge. The dust collector is provided on the other side of the electric dust collector, the second heat exchanger that receives the exhaust gas that has passed through the electric dust collector to the inside and reduces the temperature of the exhaust gas through heat exchange, and is connected to the other side of the second heat exchanger. A blower for smooth movement of the air, a discharge tower connected to the blower to receive exhaust gas from the blower and discharge it to the outside, a first heat exchanger, a cyclone scrubber, a washing water tank, a chemical supply tank, a condensation heat exchanger, an electric dust collector, A plurality of sensors that are connected to the second heat exchanger and the blower to transmit signals, and the first heat exchanger and Eclone scrubber, washing water tank, chemical supply tank, condensation heat exchanger, electric dust collector, second heat exchanger, and control unit provided to control the blower. In the multistage exhaust gas treatment process system having a recovery means of, the exhaust gas of 120 to 200°C supplied from the rear end of the tenter is supplied to the inside of the first heat exchanger, and the temperature of the exhaust gas is adjusted to one of an air-cooled type or a water-cooled type. A first step of reducing heat by heat exchange and recovering waste heat from exhaust gas, and a first injection nozzle through which the exhaust gas that has passed through the first heat exchanger is connected to the cyclone scrubber and is injected with the washing water supplied from the washing water tank. The second step of supplying the inside of the cyclone scrubber through the cyclone duct included in, and the washing water injected from the first injection nozzle while receiving the exhaust gas into the inside of the cyclone scrubber through the cyclone duct, and the inside of the cyclone scrubber Particulate matter, gaseous substances, organic solvents contained in the exhaust gas due to a plurality of second spray nozzles, a Pall ring, and a filter that spray the washing water supplied from the washing water tank and It is dropped and discharged to the bottom of the cyclone scrubber formed in a conical shape together, and the exhaust gas is vortexed and moved to the top, and the exhaust gas that has passed through the cyclone scrubber is supplied to the inside of the condensation heat exchanger. Heat exchange with either air-cooled or water-cooled type to recover waste heat from exhaust gas, reduce the temperature of the exhaust gas, reduce the temperature of the exhaust gas, and condense moisture in the exhaust gas by particulate matter, gaseous material, and organic solvents contained in the exhaust gas. The fourth step is discharged to the bottom together with the condensed water, and the exhaust gas that has passed through the condensation heat exchanger is supplied to the inside of the water separator, and the moisture contained in the exhaust gas is separated, as well as particulate matter and gaseous matter together with the separated moisture. , The fifth step of discharging organic solvents to the bottom, and the exhaust gas that has passed through the water separator is supplied to the inside of the first heat exchanger. The sixth step of raising the temperature of the exhaust gas that has passed through the water separator by exchanging heat with the exhaust gas of 120 to 200°C supplied from the rear end of the tenter, and the exhaust gas that has passed through the water separator and the first heat exchanger are provided in multiple stages. A seventh step of collecting and recovering particulate matter, gaseous matter, and organic solvents contained in exhaust gas through corona discharge, supplied to the inside of the connected electric precipitator, and a second heat exchanger for exhaust gas passing through the electric precipitator. It is supplied to the inside of the exhaust gas and heat-exchanges the exhaust gas with either an air-cooled or water-cooled type to reduce the temperature of the exhaust gas to 25 to 45°C, while condensing and discharging the moisture contained in the exhaust gas to the outside, thereby reducing the exhaust gas. The eighth step of discharging and recovering the waste heat of the exhaust gas, and the exhaust gas from which particulate matter, gaseous substances, organic solvents, and moisture have been removed from the second heat exchanger are discharged to the outside through a discharge tower through a blower. It provides a multi-stage exhaust gas treatment process system having a means for reducing odors and white smoke in exhaust gas after a tenter, and a means for recovering highly viscous pollutants, comprising 9 steps.

The multi-stage exhaust gas treatment process system having a means for reducing odor and white smoke in the exhaust gas after a tenter according to the present invention and a means for recovering highly viscous pollutants according to the present invention comprises a first heat exchanger, a cyclone scrubber, a washing water tank, Chemical supply tank, condensation heat exchanger, water separator, electric dust collector, second heat exchanger, blower, exhaust tower, multiple sensors, and particulate matter, gaseous matter, organic matter contained in the exhaust gas due to the control unit As the solvents are cleaned and collected, waste heat of exhaust gas is also recovered and reused, so it has energy saving effect and odor removal effect, and moisture contained in exhaust gas is separated and removed by the water separator and the first heat exchanger, as well as residual moisture. As the moisture particles become saturated water vapor due to heat exchange, short circuit due to moisture contained in exhaust gas during corona discharge in the electrostatic precipitator is prevented, while organic solvents are collected and recovered, thereby removing odors.

In addition, the present invention further reduces the temperature of the exhaust gas through heat exchange before the moisture contained in the exhaust gas in the second heat exchanger is transferred to the blower to further reduce condensation, thereby passing through the blower through the exhaust tower. The white smoke of the exhaust gas is also prevented.

1 is a schematic diagram of a multistage exhaust gas treatment process system having a means for reducing odor and white smoke in exhaust gas after a tenter according to the present invention, and a means for recovering highly viscous pollutants;
2 to 3 are partial schematic diagrams of a multistage exhaust gas treatment process system having a means for reducing odor and white smoke on exhaust gas after a tenter according to the present invention, and a means for recovering highly viscous pollutants;
4 is a block diagram of a multi-stage exhaust gas treatment process system having a means for reducing odor and white smoke in exhaust gas after a tenter according to the present invention, and a means for recovering highly viscous pollutants.

It will be described in more detail below with reference to the accompanying drawings specific details for the implementation of the present invention.

Referring to FIGS. 1 to 4, the present invention provides a first heat exchanger 10 and a first heat exchanger 10 connected to the rear end of the tenter to receive high-temperature exhaust gas for heat exchange and recover waste heat. A cyclone scrubber 12 that removes particulate matter, gaseous matter, and organic solvents contained in the exhaust gas while receiving the supplied exhaust gas, and is provided under the cyclone scrubber 12 to the bottom of the cyclone scrubber 12. The washing water tank 14 that supplies the washing water to the cyclone scrubber 12 as well as the washing water containing the discharged foreign matter is supplied to the inside, and a plurality of washing water tanks 14 are provided apart from each other. In the chemical supply tank 16, which is supplied to the inside of the washing water tank 14 by introducing different chemicals for the removal of non-aqueous gaseous substances, and the first heat exchanger 10 are connected to one side of the cyclone scrubber ( 12) A condensation heat exchanger 18, a condensation heat exchanger 18, and a first heat exchanger that receive the exhaust gas that has passed through it inside, and to recover waste heat of the exhaust gas and condense moisture contained in the exhaust gas through heat exchange. (10) A water separator (20) connected between the condensation heat exchanger (18) to receive exhaust gas from the condensation heat exchanger (18) and to separate and remove moisture in the exhaust gas to supply it to the inside of the first heat exchanger (10), and 1 A plurality of heat exchangers (10) are connected to the other side in multiple stages to pass the inside of the first heat exchanger (10) to receive the heated exhaust gas to the inside, as well as to particulate matter, gaseous matter, and organic matter contained in the exhaust gas. The electrostatic precipitator 22 for recovering solvents by the electrostatic precipitator method by corona discharge, and the exhaust gas provided on the other side of the electric precipitator 22 and passing through the electric precipitator 22 are supplied to the inside and exhausted through heat exchange. A second heat exchanger 24 for reducing the temperature of the gas, and a blower 26 connected to the other side of the second heat exchanger 24 to facilitate the smooth movement of the exhaust gas, and the blower 26 are provided. An exhaust tower 28 that receives exhaust gas from the blower 26 and discharges it to the outside, and a first heat exchanger (10), cyclone scrubber (12), washing water tank (14), chemical supply tank (16), condensing heat exchanger (18), electric dust collector (22), second heat exchanger (24), blower (26) respectively A plurality of sensors 30 that transmit signals are connected to each of the sensors 30 to receive signals, as well as a first heat exchanger 10, a cyclone scrubber 12, a washing tank 14, and a chemical supply tank. (16), condensation heat exchanger (18), electric dust collector (22), second heat exchanger (24), and a control unit (32) provided to control the blower (26). In a multi-stage exhaust gas treatment process system having a means for reducing the pressure and a means for recovering highly viscous pollutants, the exhaust gas of 120 to 200°C supplied from the rear end of the tenter is supplied to the inside of the first heat exchanger 10 to be exhausted. The first step of recovering waste heat from exhaust gas while reducing the temperature by exchanging the temperature of the gas with either air-cooled or water-cooled type, and connecting the exhaust gas that has passed through the first heat exchanger 10 to the cyclone scrubber 12 A second step of supplying the inside of the cyclone scrubber 12 through a cyclone duct 36 having a first injection nozzle 34 in which the washing water supplied from the washing water tank 14 is sprayed, and the cyclone The exhaust gas is supplied to the inside of the cyclone scrubber 12 through the duct 36 and the washing water sprayed from the first injection nozzle 34 and the washing water tank 14 are provided inside the cyclone scrubber 12. Particulate matter, gaseous substances, organic solvents contained in the exhaust gas are eliminated together with the washing water due to the plurality of second injection nozzles 38, the Pall ring, and the filter that spray the washing water supplied from It is dropped and discharged to the lower part of the cyclone scrubber 12 formed in a conical shape, and the exhaust gas is vortexed and moved to the top, and the exhaust gas that has passed through the cyclone scrubber 12 is condensed inside the heat exchanger 18. It is supplied as a waste gas by exchanging the exhaust gas with either air-cooled or water-cooled type. The fourth step in which the exhaust gas is reduced while heat is recovered, the exhaust gas is reduced, and the particulate matter, gaseous substances, and organic solvents contained in the exhaust gas are discharged to the bottom along with the condensate water condensed in the exhaust gas. , The exhaust gas that has passed through the condensation heat exchanger 18 is supplied to the inside of the water separator 20, separates moisture contained in the exhaust gas, and separates particulate matter, gaseous material, and organic solvents together with the separated moisture. The fifth step of discharging to and the exhaust gas that has passed through the water separator 20 is supplied to the inside of the first heat exchanger 10, and exchanges heat with the exhaust gas of 120 to 200°C supplied from the rear end of the tenter. The sixth step of raising the temperature of the exhaust gas that has passed through 20) and the exhaust gas that has passed through the water separator 20 and the first heat exchanger 10 are provided to the inside of the electric dust collector 22 connected in multiple stages. The seventh step of collecting and recovering particulate matter, gaseous matter, and organic solvents contained in the exhaust gas through corona discharge, and the exhaust gas passing through the electric precipitator 22 is transferred to the second heat exchanger 24. It is supplied to the inside and heat-exchanges the exhaust gas with either an air-cooled or water-cooled type, reducing the temperature of the exhaust gas to 25 to 45°C, and condensing and discharging the moisture contained in the exhaust gas to the outside to discharge exhaust gas with reduced white smoke. And, the eighth step of recovering the waste heat of the exhaust gas, and the exhaust gas from which particulate matter, gaseous matter, organic solvents, and moisture have passed through the second heat exchanger 24 are removed through a blower 26 and an exhaust tower ( It consists of a ninth step (S9) of discharging to the outside through 28).

First, a first heat exchanger 10 is provided connected to the rear end of the tenter to receive high-temperature exhaust gas and heat exchange while recovering waste heat.

At this time, the first heat exchanger 10 is in the group consisting of a four-tube heat exchanger, an open liquid membrane heat exchanger, a hollow tube heat exchanger, a cylindrical multi-tube heat exchanger, a jacket heat exchanger, a winding heat exchanger, and a plate heat exchanger. Any one selected is used, and when the inside of the first heat exchanger 10 is formed with a plurality of tubes, the shape of the tube can be variously formed as a spiral tube or a fin tube, and the first heat exchanger (10) Even when the interior is formed with a plurality of flat plates, the shape of the flat plate can be variously formed in a wave shape or an uneven shape.

In addition, on the inner side of the first heat exchanger 10, hot water or steam is supplied from the outside and supplied to the inner side of the first heat exchanger 10 to facilitate internal cleaning of the first heat exchanger 10 ( 40) is provided and used, and continuously supplies hot water or steam to the inside of the first heat exchanger 10 under the control of the controller 32 to be described later, or intermittently supplies hot water or steam to the first heat exchanger 10 ), the inside of the first heat exchanger 10 is always clean, and the heat exchange efficiency of the first heat exchanger 10 is also maintained.

Meanwhile, a sensor 30 to be described later is provided on the first heat exchanger 10 to transmit the state and information inside the first heat exchanger 10 to the control unit 32.

A cyclone scrubber 12 is provided to receive the exhaust gas that has passed through the first heat exchanger 10 and remove particulate matter, gaseous material, and organic solvents contained in the exhaust gas.

At this time, on the cyclone scrubber 12, a first injection nozzle 34, a cyclone duct 36, a second injection nozzle 38, a Pall ring, and a filter (Demister), which will be described later, are provided, and exhaust gas By passing through the cyclone duct 36 having the first injection nozzle 34, which is a narrow passage, particulate matter, gaseous matter, and organic solvent contained in the exhaust gas are intensively supplied. It is dropped and discharged to the bottom of the cyclone scrubber 12 to improve clogging of the Pall ring and the filter, as well as the second spray nozzle 38 that sprays washing water, the Pall ring, and the filter. Due to (Demister), it is possible to more efficiently remove and recover particulate matter, gaseous matter, organic solvents, which are foreign substances contained in exhaust gas.

On the other hand, the exhaust gas from the inside of the cyclone scrubber 12 is increased due to the cyclone duct 36 connected to the cyclone scrubber 12 as shown in FIG. 2, and thus particulate matter contained in the exhaust gas , It is easier to collect and discharge gaseous substances and organic solvents.

In addition, a sensor 30 to be described later is provided on the cyclone scrubber 12 to transmit the status and information of the cyclone scrubber 12 to the controller 32.

A washing water tank 14 provided under the cyclone scrubber 12 to receive washing water containing foreign substances discharged to the lower portion of the cyclone scrubber 12 and supplying washing water to the cyclone scrubber 12 ) And the washing water tank 14, and a plurality of them are provided, and a different chemical for the removal of non-aqueous gaseous substances is contained inside each of the chemicals supply tank 16 which is supplied to the inside of the washing water tank 14. ) Is provided.

At this time, the washing water tank 14 is provided with a water level measuring sensor 46 that measures the water level of the washing water and transmits it to the control unit 32, and is cleaned between the washing water tank 14 and the cyclone scrubber 12. It is preferable that a float sensor 48 not shown that measures the supply of water and transmits it to the control unit 32 is provided.

In addition, the outer side spaced apart from the washing water tank 14 is connected to the washing water tank 14 to receive washing water containing oil from the washing water tank 14 to separate oil from the washing water and collect oil. It is more preferable that the illustrated belt or screw type oil-water separator 44 is provided, and the oil separated by the oil-water separator 44 is reused as a leather eggplant or the like.

In addition, each of the chemical supply tanks 16 is provided with a metering pump 42 for supplying a certain amount of chemicals to the washing water tank 14, respectively, and water, ammonium hydroxide, and water in each of the chemical supply tanks 16, In the group consisting of sodium hydroxide, potassium hydroxide, hydrogen peroxide, nitric acid, acetic acid, hydrochloric acid, phosphoric acid, sodium carbonate, and sulfuric acid, one or two or more chemicals are selectively provided to collect non-aqueous foreign substances among gaseous substances. will be.

It is provided connected to one side of the first heat exchanger 10 to receive the exhaust gas that has passed through the cyclone scrubber 12 to the inside, and to recover waste heat of the exhaust gas and to condense moisture contained in the exhaust gas through heat exchange. The condensation heat exchanger 18 is provided.

At this time, the condensation heat exchanger 18 is any one selected from the group consisting of a four-tube heat exchanger, an open liquid membrane heat exchanger, a hollow tube heat exchanger, a cylindrical and multi-tube heat exchanger, a jacket heat exchanger, a winding heat exchanger, and a plate heat exchanger. One is used, and when the inside of the condensation heat exchanger 18 is formed with a plurality of tubes, the shape of the tube can be variously formed as a spiral tube or a fin tube, and the inside of the condensation heat exchanger 18 is plural. Even when formed into two flat plates, the shape of the flat plate can be variously formed in a wave shape or an uneven shape.

In addition, on the inside of the condensation heat exchanger 18, a washing spray nozzle 40 is provided and used to receive hot water or steam from the outside and supply it to the inside of the condensation heat exchanger 18 to wash the inside of the condensation heat exchanger 18. The condensation heat exchanger is continuously supplied with hot water or steam to the inside of the condensation heat exchanger 18 or intermittently supplying hot water or steam to the inside of the condensation heat exchanger 18 under the control of the controller 32 to be described later. 18) The inside is always clean and the heat exchange efficiency of the condensation heat exchanger 18 is also maintained.

On the other hand, a sensor 30 to be described later is provided on the condensation heat exchanger 18 to transmit the state and information inside the condensation heat exchanger 18 to the control unit 32.

The condensation heat exchanger (18) and the first heat exchanger (10) are connected to each other to receive exhaust gas from the condensation heat exchanger (18) and to separate and remove moisture in the exhaust gas. A water separator 20 supplied to the inside is provided.

At this time, the water separator 20 may have various shapes.

A plurality of the first heat exchanger (10) is provided in multiple stages connected to the other side of the first heat exchanger (10), passing through the inside of the first heat exchanger (10) to receive the heated exhaust gas to the inside, and to the particulate matter and gaseous phase contained in the exhaust gas. An electric precipitator 22 is provided for recovering substances, oil mist, and organic solvents such as VOCs in an electrostatic precipitating method by corona discharge.

At this time, the electric precipitator 22 is used by being connected in series to the other side of the first heat exchanger 10 in multiple stages, or in multiple stages on the other side of the first heat exchanger (10). It can also be used in parallel connection.

In addition, on the inside of the electric precipitator 22, a washing spray nozzle 40 that receives hot water or steam from the outside and supplies it to the inside of the electric precipitator 22 is provided and used. The power is cut off under the control of the control unit 32 to be described later, and hot water or steam is intermittently supplied to the inside of the electric precipitator 22, thereby purifying the inside of the electric precipitator 22.

On the other hand, the electric precipitator 22 is provided with a sensor 30, which will be described later, to transmit the state and information inside the electric precipitator 22 to the control unit 32.

The second heat exchanger 24 is provided on the other side of the electric precipitator 22 and receives the exhaust gas that has passed through the electric precipitator 22 to the inside and reduces the temperature of the exhaust gas through heat exchange.

At this time, the second heat exchanger 24 is provided to prevent the white smoke phenomenon of the exhaust gas discharged to the outside through the discharge tower 28 to be described later, and is a four-tube heat exchanger, an open liquid film heat exchanger, and a hollow tube heat exchanger. In the case where the inside of the second heat exchanger 24 is formed of a plurality of tubes, any one selected from the group consisting of a heat exchanger, a cylindrical multi-tube heat exchanger, a jacket heat exchanger, a spiral wound heat exchanger, and a plate heat exchanger is used. The shape of the tubular body can be variously formed as a spiral tube or fin tube, and even when the inside of the second heat exchanger 24 is formed into a plurality of flat plates, the shape of the flat plate can be varied in a wave shape or irregular shape. It can be formed.

In addition, on the inside of the second heat exchanger 24, hot water or steam is supplied from the outside and supplied to the inside of the second heat exchanger 24 to facilitate internal cleaning of the second heat exchanger 24 ( 40) is provided and used, and hot water or steam is intermittently supplied to the inside of the second heat exchanger 24 only when cleaning of the second heat exchanger 24 is required under the control of the controller 32 to be described later. As a result, the inside of the second heat exchanger 24 is always clean and the heat exchange efficiency of the second heat exchanger 24 is also maintained.

Meanwhile, on the second heat exchanger 24, a sensor 30, which will be described later, is provided to transmit the state and information inside the second heat exchanger 24 to the controller 32.

A blower 26 is provided connected to the other side of the second heat exchanger 24 to facilitate the smooth movement of exhaust gas.

At this time, the exhaust gas supplied to the blower 26 is supplied with exhaust gas from which particulate matter, gaseous substances, organic solvents and moisture have been removed, so that the occurrence of failure of the blower 26 is significantly reduced, as well as easy maintenance. There is an advantage.

In addition, on the blower 26, a sensor 30 (not shown) that measures the number of revolutions of the blower 26 and transmits it to the control unit 32 is provided and used.

The exhaust tower 28 connected to the blower 26 to receive exhaust gas from the blower 26 and discharge it to the outside, the first heat exchanger 10, the cyclone scrubber 12, the washing water tank 14 , A chemical supply tank (16), a condensation heat exchanger (18), an electric dust collector (22), a second heat exchanger (24), a plurality of sensors 30, which are respectively connected to the blower 26 to transmit signals, and a sensor ( 30) The first heat exchanger (10), cyclone scrubber (12), washing water tank (14), chemical supply tank (16), condensing heat exchanger (18), electric dust collector (22) , The second heat exchanger 24 and a control unit 32 provided to control the blower 26 are provided.

Meanwhile, the washing spray nozzle 40 is not only used for washing, but also can be used to extinguish a fire by spraying water or a extinguishing liquid when a fire occurs.

In addition, on the multi-stage exhaust gas treatment process system having a means for reducing odor and white smoke from exhaust gas at the rear end of the tenter according to the present invention and a means for recovering highly viscous pollutants, a cooling tower for cooling the cooling water that has been heat-exchanged as shown in FIG. 50 and a clean-up tank 52 for cleaning the electric precipitator 22 may be provided and used.

At this time, the cleanup tank 52 is divided into a plurality of spaces that can be accommodated therein due to a partition wall, and steam, hot water or washing water is selectively supplied to each space to be seated inside the cleanup tank 52 for cleaning. The electric dust collector 22 is cleaned.

On the other hand, the sequence of the multi-stage exhaust gas treatment process system having a means for reducing odor and white smoke in exhaust gas after a tenter according to the present invention, and a means for recovering highly viscous pollutants is as follows.

The exhaust gas of 120 to 200°C supplied from the rear end of the tenter is supplied to the inside of the first heat exchanger 10 and heat-exchanging the temperature of the exhaust gas with either an air-cooled type or a water-cooled type, thereby reducing the temperature and recovering the waste heat of the exhaust gas. (S1 step)

At this time, the exhaust gas inside the first heat exchanger 10 is heat-exchanged from 120 to 200°C to 70 to 90°C, and the cooling water used at this time is supplied to the place where hot water is needed and utilized or supplied to the cooling tower 48 Is cooled.

A cyclone duct having a first injection nozzle 34 inside which the exhaust gas that has passed through the first heat exchanger 10 is connected to the cyclone scrubber 12 and through which the washing water supplied from the washing water tank 14 is injected. 36) is supplied to the inside of the cyclone scrubber 12 (step S2).

The exhaust gas is supplied to the inside of the cyclone scrubber 12 through the cyclone duct 36 and the washing water sprayed from the first injection nozzle 34 and the washing water are provided on the inside of the cyclone scrubber 12 to provide a washing tank ( Particulate matter, gaseous substances, organic solvents contained in the exhaust gas due to the plurality of second spray nozzles 38, which inject the washing water supplied from 14), the Pall ring, and the filter (Demister) It falls and discharges to the lower part of the cyclone scrubber 12 formed in a conical shape together, and the exhaust gas is vortexed and moved to the upper part (step S3).

At this time, on the cyclone scrubber 12, a first injection nozzle 34, a cyclone duct 36, a second injection nozzle 38, a Pall ring, and a filter are provided, and exhaust gas is narrow. A cyclone scrubber in which particulate matter, gaseous matter, and organic solvents contained in exhaust gas are formed in a conical shape by intensively supplying high-pressure washing water that has been atomized through the cyclone duct 36 having the first injection nozzle 34 as a passage. It is dropped and discharged to the lower part of (12) to improve clogging of the Pall ring and filter, as well as the second spray nozzle 38 that sprays washing water, the Pall ring, and the filter (Demister). ), it is possible to more efficiently remove and recover foreign substances such as particulate matter, gaseous substances, and organic solvents contained in the exhaust gas.

On the other hand, the exhaust gas from the inside of the cyclone scrubber 12 is increased due to the cyclone duct 36 connected to the cyclone scrubber 12 as shown in FIG. 2, and thus particulate matter contained in the exhaust gas , It is easier to collect and discharge gaseous substances and organic solvents.

The exhaust gas of 50 to 70°C that has passed through the cyclone scrubber 12 is supplied to the inside of the condensation heat exchanger 18, and the exhaust gas is exchanged with one selected from an air-cooled type or a water-cooled type to recover the waste heat of the exhaust gas. The temperature is reduced to 40~60℃, the exhaust gas is reduced, and particulate matter, gaseous substances, and organic solvents contained in the exhaust gas are discharged to the bottom along with the condensate water condensed in the exhaust gas (step S4).

The exhaust gas that has passed through the condensation heat exchanger 18 is supplied to the inside of the water separator 20, and the moisture contained in the exhaust gas is separated, and particulate matter, gaseous material, and organic solvents are transferred to the bottom with the separated moisture. Discharge (S5 step)

At this time, the condensed water and moisture generated in the condensation heat exchanger 18 and the water separator 20 are supplied to the washing water tank 14.

The exhaust gas that has passed through the water separator 20 is supplied to the inside of the first heat exchanger 10, and exchanges heat with the exhaust gas of 120 to 200°C supplied from the rear end of the tenter to reduce the exhaust gas passing through the water separator 20. Raise the temperature to ~70℃ (S6 step)

Particulate matter contained in exhaust gas through corona discharge is supplied to the inside of the electrostatic precipitator 22 that is connected in multiple stages and is provided with a plurality of exhaust gases that have passed through the water separator 20 and the first heat exchanger 10 , Gaseous substances, oil mist and organic solvents such as VOCs are collected and recovered (S7 step)

The exhaust gas that has passed through the electric precipitator 22 is supplied to the inside of the second heat exchanger 24, and the exhaust gas is heat-exchanged with either an air-cooled type or a water-cooled type to reduce the temperature of the exhaust gas to 25 to 45°C. The moisture contained in is condensed and discharged to the outside to discharge exhaust gas with reduced white smoke, and waste heat of the exhaust gas is recovered (step S8).

Exhaust gas from which particulate matter, gaseous matter, organic solvents, and moisture have passed through the second heat exchanger 24 are discharged to the outside through a blower 26 through a discharge tower 28 (step S9).

The present invention constituted as described above is a first heat exchanger 10, a cyclone scrubber 12, a washing water tank 14, a chemical supply tank 16, a condensation heat exchanger 18, and a water separator 20. Wow, the electric dust collector 22, the second heat exchanger 24, the blower 26, the exhaust tower 28, a plurality of sensors 30, and the Foreign matter particulate matter, gaseous matter, and organic solvents are cleaned and collected, and waste heat of exhaust gas is also recovered and reused, resulting in energy saving effect and odor removal effect, and is used as a water separator 20 and a first heat exchanger 10. As a result, moisture contained in the exhaust gas is separated and removed, as well as the residual moisture and particles of the moisture become saturated water vapor due to heat exchange, so that short circuit due to moisture contained in the exhaust gas during corona discharge in the electrostatic precipitator 22 is prevented. As solvents are collected and recovered, odors are also removed.

In addition, in the present invention, the moisture contained in the exhaust gas in the second heat exchanger 24 is lowered again through heat exchange before the exhaust gas is moved to the blower 26 to further condense and remove moisture. , White smoke of the exhaust gas discharged through the exhaust tower 28 through the blower 26 is also prevented.

10: first heat exchanger 12: cyclone scrubber
14: washing water tank 16: chemical supply tank
18: condensation heat exchanger 20: water separator
22: electric dust collector 24: second heat exchanger
26: blower 28: discharge tower
30: sensor 32: control unit
34: first injection nozzle 36: cyclone duct
38: second injection nozzle 40: washing injection nozzle
42: metering pump 44: oil-water separator
46: water level measurement sensor 48: float sensor
50: cooling tower 52: cleanup tank

Claims (5)

A first heat exchanger 10 connected to the rear end of the tenter to receive high-temperature exhaust gas and heat exchange and recover waste heat, and the exhaust gas that has passed through the first heat exchanger 10 is supplied and included in the exhaust gas. A cyclone scrubber 12 that removes particulate matter, gaseous substances, and organic solvents, and washing water including foreign matters disposed under the cyclone scrubber 12 and discharged to the lower portion of the cyclone scrubber 12 is supplied to the inside. A washing water tank 14 for receiving and supplying the washing water to the cyclone scrubber 12, and a plurality of washing water tanks 14 are provided apart from the washing water tank 14. The chemical supply tank 16, which is supplied with chemicals inside the washing water tank 14, is connected to one side of the first heat exchanger 10 to receive the exhaust gas passing through the cyclone scrubber 12 to the inside. In addition, the condensation heat exchanger 18 is connected between the condensation heat exchanger 18 and the first heat exchanger 10 to recover waste heat of exhaust gas and condensation of moisture contained in the exhaust gas through heat exchange. ), the water separator 20 that separates and removes moisture in the exhaust gas and supplies it to the inside of the first heat exchanger 10, and a plurality of multiple stages on the other side of the first heat exchanger 10 It is connected to the inside of the first heat exchanger 10 and passes through the inside of the first heat exchanger 10 to receive the heated exhaust gas to the inside, and collects particulate matter, gaseous substances, and organic solvents contained in the exhaust gas by electric dust collection method by corona discharge The second heat exchanger 24 is provided on the other side of the electric dust collector 22 to receive the exhaust gas that has passed through the electric dust collector 22 to the inside and reduces the temperature of the exhaust gas through heat exchange. ), and a blower 26 connected to the other side of the second heat exchanger 24 to facilitate the smooth movement of exhaust gas, and a blower 26 connected to the blower 26 to receive exhaust gas from the blower 26 to the outside. Discharge tower 28, first heat exchanger 10, cyclone scrubber 12, washing water tank ( 14), a chemical supply tank (16), a condensation heat exchanger (18), an electric precipitator (22), a second heat exchanger (24), a plurality of sensors (30) that are respectively connected to the blower (26) to transmit signals, The first heat exchanger (10), cyclone scrubber (12), washing water tank (14), chemical supply tank (16), condensing heat exchanger (18), electric dust collector ( 22), a second heat exchanger 24, a control unit 32 provided to control the blower 26, and has a means for reducing odors and white smoke in the exhaust gas at the rear end of the tenter, and a means for recovering highly viscous pollutants. In the multistage exhaust gas treatment process system,
The exhaust gas of 120 to 200°C supplied from the rear end of the tenter is supplied to the inside of the first heat exchanger 10 and heat-exchanging the temperature of the exhaust gas with either an air-cooled type or a water-cooled type, thereby reducing the temperature and recovering the waste heat of the exhaust gas. A first step (S1);
A cyclone duct having a first injection nozzle 34 inside which the exhaust gas that has passed through the first heat exchanger 10 is connected to the cyclone scrubber 12 and through which the washing water supplied from the washing water tank 14 is injected. A second step (S2) of supplying to the inside of the cyclone scrubber 12 through 36);
The exhaust gas is supplied to the inside of the cyclone scrubber 12 through the cyclone duct 36 and the washing water sprayed from the first injection nozzle 34 and the washing water are provided on the inside of the cyclone scrubber 12 to provide a washing tank ( Particulate matter, gaseous substances, organic solvents contained in the exhaust gas due to the plurality of second spray nozzles 38, which inject the washing water supplied from 14), the Pall ring, and the filter (Demister) The third step (S3) is dropped and discharged to the lower portion of the cyclone scrubber 12 formed in a conical shape together, and the exhaust gas is vortexed and moved upward;
The exhaust gas that has passed through the cyclone scrubber 12 is supplied to the inside of the condensation heat exchanger 18, and the exhaust gas is heat-exchanged with either an air-cooled type or a water-cooled type to recover the waste heat of the exhaust gas and reduce the temperature of the exhaust gas, and exhaust A fourth step (S4) in which the gas is reduced in temperature and particulate matter, gaseous material, and organic solvents contained in the exhaust gas are discharged to the bottom together with condensed water in which moisture is condensed in the exhaust gas;
The exhaust gas that has passed through the condensation heat exchanger 18 is supplied to the inside of the water separator 20, and the moisture contained in the exhaust gas is separated, and particulate matter, gaseous material, and organic solvents are transferred to the bottom with the separated moisture. A fifth step of discharging (S5);
The exhaust gas that has passed through the water separator 20 is supplied to the inside of the first heat exchanger 10, and heats up the exhaust gas that has passed through the water separator 20 by exchanging heat with the exhaust gas of 120 to 200°C supplied from the rear end of the tenter. A sixth step (S6);
Particulate matter contained in exhaust gas through corona discharge is supplied to the inside of the electrostatic precipitator 22 that is connected in multiple stages and is provided with a plurality of exhaust gases that have passed through the water separator 20 and the first heat exchanger 10 , A seventh step (S7) of collecting and recovering gaseous substances and organic solvents;
The exhaust gas that has passed through the electric precipitator 22 is supplied to the inside of the second heat exchanger 24, and the exhaust gas is heat-exchanged with either an air-cooled type or a water-cooled type to reduce the temperature of the exhaust gas to 25 to 45°C. An eighth step (S8) of condensing and discharging the moisture contained in the exhaust gas to the outside to discharge exhaust gas with reduced white smoke, and recovering waste heat of the exhaust gas;
A ninth step (S9) of discharging the exhaust gas from which particulate matter, gaseous substances, organic solvents, and moisture have passed through the second heat exchanger (24) to the outside through a blower (26) and a discharge tower (28). ;
A multistage exhaust gas treatment process system having a means for reducing odors and white smoke on exhaust gas after the tenter, and a means for recovering highly viscous pollutants. The method of claim 1,
The first heat exchanger 10, the condensation heat exchanger 18, the electric dust collector 22, and the second heat exchanger 24 receive water or steam from the outside, respectively, and the first heat exchanger 10, the condensation heat exchanger (18), the first heat exchanger (10), the condensation heat exchanger (18), the electric dust collector (22), the second heat exchanger (24) by supplying to the inside of the electric dust collector (22) and the second heat exchanger (24), respectively Multi-stage exhaust gas having a means for reducing odor and white smoke on exhaust gas at the rear end of the tenter, and a means for recovering highly viscous pollutants, characterized in that each is provided with washing spray nozzles 40 for cleaning the inside of the unit or extinguishing fire Treatment process system. The method of claim 1,
Each of the chemical supply tanks 16 is provided with a metering pump 42 for supplying a certain amount of chemicals to the washing water tank 14, respectively, and water, ammonium hydroxide, sodium hydroxide inside each of the chemical supply tanks 16 , Potassium hydroxide, hydrogen peroxide, nitric acid, acetic acid, hydrochloric acid, phosphoric acid, sodium carbonate, sulfuric acid, one or two or more chemicals in the group consisting of a mixture of one or two or more chemicals to reduce odor and white smoke in the exhaust gas after the tenter. A multistage exhaust gas treatment process system having a means for recovering viscous pollutants. The method of claim 1,
An oil-water separator connected to the washing water tank 14 on the outside spaced apart from the washing water tank 14 to receive the washing water including oil from the washing water tank 14 to separate the oil from the washing water and collect the oil ( 44) is a multistage exhaust gas treatment process system comprising means for reducing odors and white smoke in exhaust gas after the tenter, and means for recovering highly viscous pollutants. The method of claim 1,
A water level measurement sensor 46 that measures the level of the washing water and transmits it to the control unit 32 is provided on the washing bath 14, and the supply of washing water is measured between the washing bath 14 and the cyclone scrubber 12. A multistage exhaust gas treatment process system having a means for reducing odors and white smoke in exhaust gas at the rear end of the tenter, and a means for recovering highly viscous pollutants, characterized in that a float sensor 48 that is transmitted to the control unit 32 is provided.

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