CN211936116U - A device for spray cooling and water collection in a desulfurization tower and a process disposal device outside the tower - Google Patents

Abstract

The utility model provides a spray cooling water-receiving and outside-tower process disposal device in a desulfurizing tower, which comprises a desulfurizing tower and a heat exchange unit; the desulfurization tower is sequentially provided with a desulfurization liquid outlet, a flue gas inlet, a desulfurization spraying layer, a water collecting layer, a packing layer, a cooling spraying layer, a demister and a flue gas outlet from bottom to top, wherein the water collecting layer is provided with a water collecting tray, the water collecting tray is provided with a through hole which is communicated up and down and an air cap matched with the through hole, and the bottom of the water collecting tray is provided with a water outlet; the heat exchange unit comprises a heat exchanger, the heat exchanger is provided with a heat medium inlet, a heat medium outlet, a refrigerant inlet and a refrigerant outlet, the heat medium inlet is communicated with a water outlet pipeline at the bottom of the water collecting tray, and the heat medium outlet is communicated with a cooling spray header pipeline. The utility model discloses a spray cooling in the desulfurizing tower and receive water and outer technology processing apparatus of tower has reduced the temperature of desulfurizing tower export flue gas, has reduced the hydrofuge volume, and the plume forms when having reduced the fume emission for better by cooling water absorption such as liquid, dust, aerosol that contain in the flue gas.

Description

A device for spray cooling and water collection in a desulfurization tower and a process disposal device outside the tower

technical field

The utility model relates to the technical field of chemical equipment, in particular to a desulphurization tower spraying, cooling and water collecting and a process disposal device outside the tower.

Background technique

In addition to a large amount of sulfur dioxide, the flue gas generated during the operation of a coal-fired power plant boiler also contains a large amount of fine particulate matter. The latter will form aerosol pollution at the chimney exhaust, which is an important culprit for the formation of severe weather such as haze. First, the realization of flue gas purification has become a top priority in today's air pollution control industry. In addition, since the flue gas discharged from the desulfurization outlet is saturated wet flue gas and the temperature of the flue gas discharged is relatively high, it is mixed with cold air after being discharged from the chimney, causing the water vapor in the flue gas to suddenly condense to form white smoke.

In recent years, the methods of eliminating white smoke include MGGH, slurry condensation method and flue condensation method, etc. MGGH is a water-mediated heat exchanger. This scheme is generally to install a cooling section heat exchanger at the entrance of the electrostatic precipitator, and the desulfurization A heat exchanger in the heating section is installed at the outlet, and the flue gas after desulfurization is heated by the heat of the flue gas before the electrostatic precipitator. This scheme has played a role in eliminating white smoke to a certain extent, but the amount of reconstruction work is large, the cost is high, and at the same time The heat exchanger at the outlet of the desulfurization tower is easy to corrode and leak, and the economy is poor; the slurry condensation to eliminate white smoke is to install a heat exchanger on the desulfurization slurry circulation pipeline to reduce the temperature of the slurry, thereby reducing the temperature of the desulfurization flue gas and reducing the moisture content of the flue gas. , and then eliminate the method of white wet plume, but this method is easy to destroy the water balance of the absorption tower, and there is a greater safety hazard.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a desulphurization tower spray cooling water collection and process treatment device outside the tower.

In order to achieve the above purpose, the technical scheme adopted by the present invention is: a desulfurization device, the desulfurization device includes a desulfurization tower and a heat exchange unit;

The desulfurization tower is sequentially provided with a desulfurization liquid outlet, a flue gas inlet, a desulfurization spray layer, a water collecting layer, a packing layer, a cooling spray layer, a mist eliminator and a flue gas outlet from bottom to top, and the desulfurization spray layer is provided with There is a desulfurization spray head, the water collection layer is provided with a water collection tray, the surrounding edges of the water collection tray are fixedly connected with the inner wall of the desulfurization tower, and the water collection tray is provided with through holes that penetrate up and down and are connected with each other. The air cap matched with the through hole, a water outlet is arranged at the bottom of the water collecting tray, and a cooling spray head is arranged on the cooling spray layer;

The heat exchange unit includes a heat exchanger, the heat exchanger has a heat medium inlet, a heat medium outlet, a refrigerant inlet and a refrigerant outlet, the heat medium inlet of the heat exchanger and the water outlet pipe at the bottom of the water collecting tray The heat medium outlet of the heat exchanger is communicated with the cooling shower head pipeline.

The above-mentioned desulfurization device is equipped with a desulfurization liquid outlet, a flue gas inlet, a desulfurization spray layer, a water collecting layer, a packing layer, a cooling spray layer, a mist eliminator and a flue gas outlet in order from bottom to top in the desulfurization tower, and water collection. The layer, packing layer and cooling spray layer can cool the outlet flue gas and then discharge it through the mist eliminator, thereby reducing the temperature of the flue gas at the outlet of the desulfurization tower, reducing the amount of moisture exhausted, and realizing the purpose of reducing the formation of smoke plumes; The principle of use of the desulfurization device is as follows: the flue gas from the incineration enters the desulfurization tower through the flue gas inlet of the desulfurization tower in the desulfurization tower and reaches the desulfurization spray layer. The flue gas after the spray layer becomes wet flue gas, and then enters the packing layer through the air cap of the water collecting tray. At this time, the cooling spray head sprays the water entering from the refrigerant outlet of the heat exchanger to cool down, and then passes through the demister to further reduce the temperature. After the water content in the flue gas is discharged, the water collecting tray is provided with a gas cap. The air cap can realize the circulation of the flue gas, but it can prevent the water sprayed by the cooling sprinkler from flowing downward, and the water collected by the water collecting tray absorbs the heat of the flue gas. Then, it enters from the heat medium inlet of the heat exchanger, and is recycled after heat exchange. The above-mentioned desulfurization device is provided with a packing layer under the cooling spray layer, which can prolong the contact area and contact area between the water sprayed by the cooling spray head and the flue gas. Time, further improve the cooling effect of flue gas, and can also make the impurities such as liquid, dust, aerosol contained in the flue gas better absorbed by the cooling water, and improve the quality of flue gas emission.

Preferably, the air cap includes an air cap tube and an air cap cover, the air cap tube is a cylinder without upper and lower bottom surfaces, the air cap tube communicates with the through hole and extends above the water collecting tray, so The air cap is fixed above the air cap tube, and a ventilation interval is left between the air cap cap and the air cap tube, and the vertical projection of the air cap cap conceals the vertical projection of the air cap tube.

The gas cap of the desulfurization device has a simple structure, and can better achieve the effect of preventing the downward flow of the liquid through the flue gas passing through the water collecting tray.

Preferably, the heat exchange unit further includes a buffer water tank, the heat medium inlet of the heat exchanger is in communication with the buffer water tank pipeline, and the buffer water tank is in communication with the water outlet pipeline of the water collecting tray , a water pump is connected to the pipeline between the heat medium inlet of the heat exchanger and the buffer water tank.

Preferably, the buffer water tank is provided with a water inlet, a process water supply port, an overflow port, an emptying port, a water outlet and a liquid level gauge, and the water inlet of the buffer water tank and the water outlet pipe of the water collecting tray are provided. The water outlet of the buffer water tank is communicated with the heat medium inlet pipeline of the heat exchanger.

The above-mentioned desulfurization device can temporarily store the water flowing out from the water outlet of the water collecting tray by setting a buffer tank between the heat exchanger and the water outlet of the water collecting tray, so as to avoid the impurities carried in the water from circulating into the heat exchanger tower, and effectively protect the Heat exchanger and impurity removal, the buffer water tank is provided with water inlet, process water supply, overflow, emptying, water outlet, and liquid level gauge. According to the liquid level gauge, the water in the buffer tank can be supplemented through the water supply port. Or discharge the water in the buffer tank through the drain port to adjust the overall water balance and remove impurities

Preferably, the liquid level gauge is an ultrasonic level gauge, a magnetic flap level gauge or a differential pressure level gauge.

Preferably, the heat exchanger is a liquid-liquid heat exchanger or a gas-liquid heat exchanger.

Preferably, the filler material of the filler layer is glass fiber reinforced plastic, ceramics or stainless steel.

When the above-mentioned filler material is used for the packing layer of the above-mentioned desulfurization device, the effect of gas-liquid contact during spraying can be better improved, and the effect of spraying and cooling can be improved.

Preferably, a first electric valve, a first flow meter, a first temperature transmitter, a first pressure transmitter, a first electric valve, a first flow meter, a first temperature transmitter, a first pressure transmitter, a One in-situ thermometer and first in-situ pressure gauge.

Preferably, the pipeline between the heat medium inlet of the heat exchanger and the water outlet of the water collecting tray is provided with a second electric valve, a second flow meter, a second temperature transmitter and a second local thermometer.

The beneficial effects of the utility model are as follows: the utility model provides a device for spraying cooling water in the desulfurization tower and a process treatment device outside the tower, and the device for spraying cooling water in the desulfurization tower and the process treatment device outside the tower reduces the The temperature of the flue gas at the outlet of the desulfurization tower reduces the amount of moisture and reduces the formation of smoke plumes when the flue gas is discharged, so that the liquid, dust, aerosol and other impurities contained in the flue gas are better absorbed by the cooling water, improving the flue gas discharge. quality.

Description of drawings

FIG. 1 is a schematic structural diagram of a desulfurization device according to an embodiment of the present invention.

2 is a schematic structural diagram of a water collecting tray of a desulfurization device according to an embodiment of the present invention.

Among them, 1. Desulfurization tower, 2. Heat exchanger, 3. Buffer water tank, 4. Water outlet of water collecting tray, 5. First flow meter, 6. Flue gas inlet, 7. Desulfurization spray layer, 8. Desulfurization sprinkler, 9, water collecting tray, 10, gas cap, 11, packing layer, 12, cooling spray layer, 13, cooling sprinkler, 14, mist eliminator, 15, flue gas outlet, 16, desulfurization Liquid outlet, 17, slurry circulation pump, 18, refrigerant inlet, 19, heating medium outlet, 20, refrigerant outlet, 21, heating medium inlet, 22, water pump, 23, first thermometer, 24, first electric valve, 25, The water outlet of the buffer water tank, 26, the emptying port of the buffer water tank, 27, the process water supply port of the buffer water tank, 28, the water inlet of the buffer water tank, 29, the liquid level gauge of the buffer water tank, 30, the second Thermometer, 31, overflow port of buffer tank, 32, through hole, 33, gas cap cylinder, 34, gas cap cover.

Detailed ways

In order to better illustrate the purpose, technical solutions and advantages of the present utility model, the present utility model will be further described below with reference to specific embodiments.

Example 1

As a desulfurization device according to an embodiment of the present invention, as shown in Figures 1 and 2, the device includes a desulfurization tower 1 and a heat exchange unit;

The desulfurization tower 1 is provided with a desulfurization liquid outlet 16, a flue gas inlet 6, a desulfurization spray layer 7, a water collecting layer, a packing layer 11, a cooling spray layer 12, a mist eliminator 14 and a flue gas outlet 15 sequentially from bottom to top. The spray layer 7 is provided with a desulfurization spray head 8, the water collection layer is provided with a water collection tray 9, the surrounding edges of the water collection tray 9 are fixedly connected with the inner wall of the desulfurization tower 1, and the water collection tray 9 is provided with up and down through holes. 32 and the air cap 10 matched with the through hole 32, the bottom of the water collecting tray is provided with a water outlet 4, and the cooling spray layer 12 is provided with a cooling spray head 13;

The heat exchange unit includes a heat exchanger 2, the heat exchanger has a heat medium inlet 21, a heat medium outlet 19, a refrigerant inlet 18 and a refrigerant outlet 20, and the heat medium inlet of the heat exchanger is connected with the water outlet pipeline at the bottom of the water collecting tray, The heat medium outlet of the heat exchanger is communicated with the cooling sprinkler pipeline.

In order to better realize that the flue gas passes through the water collecting tray and prevents the liquid from flowing downward, the air cap 10 includes an air cap tube 33 and an air cap cover 34. The air cap tube is a cylinder without upper and lower bottom surfaces, and the air cap tube communicates with the through hole. And extending to the top of the water collecting tray, the air cap cover is fixed above the air cap tube and there is a ventilation interval between the air cap cap and the air cap tube, and the vertical projection of the air cap cap covers the vertical projection of the air cap tube.

Further, the heat exchange unit also includes a buffer water tank 3, the heat medium inlet of the heat exchanger is connected with the buffer water tank pipeline, and the buffer water tank 3 is provided with a water inlet 28, a process water supply port 27, a water outlet 25, and an emptying port. 26. With the liquid level gauge 29, the water inlet of the buffer water tank is connected with the water outlet pipeline of the water collecting tray, and the water outlet of the buffer water tank is connected with the heat medium inlet pipeline of the heat exchanger, and the heat medium inlet of the heat exchanger is connected. A water pump 22 is connected to the pipeline between the water outlet of the buffer water tank. The buffer tank can temporarily store the water flowing out from the water outlet of the water collecting tray, so as to prevent the water from carrying impurities into the heat exchanger tower, effectively protecting the heat exchanger and removing impurities. , water outlet, emptying port and liquid level gauge, according to the liquid level gauge, the water in the buffer tank can be supplemented through the water replenishment port or the water in the buffer tank can be discharged through the emptying port to adjust the overall water balance and remove impurities.

Further, the liquid level gauge is an ultrasonic liquid level gauge, a magnetic flap liquid level gauge or a differential pressure liquid level gauge.

In order to avoid blockage due to impurities such as aerosol and dust contained in the water of the cooling sprinkler during the heat exchange process, the heat exchanger is a liquid-liquid heat exchanger or a gas-liquid heat exchanger.

Further, a first electric valve 24, a first flow meter 5, a first temperature transmitter, a first pressure transmitter, and a first In-situ thermometer 23 and first in-situ pressure gauge.

Further, the pipeline between the heat medium inlet of the heat exchanger and the water outlet of the water collecting tray is provided with a second electric valve, a second flow meter, a second temperature transmitter and a second on-site thermometer 30 .

Further, the desulfurization shower head 8 is communicated with a desulfurization liquid supply mechanism.

The operating principle of the desulfurization device of the present embodiment is as follows: the incineration flue gas enters the desulfurization tower through the flue gas inlet of the desulfurization tower in the desulfurization tower and reaches the desulfurization spray layer, and in the desulfurization spray layer, the desulfurization slurry is sprayed through the desulfurization spray head to perform desulfurization and dust removal. , the flue gas after passing through the desulfurization spray layer becomes wet flue gas, and then enters the packing layer through the air cap of the water collecting tray. At this time, the cooling spray head sprays the water entering from the refrigerant outlet of the heat exchanger to cool down and then demisters. The water collector further reduces the water content in the flue gas and then discharges it. The water collecting tray is provided with an air cap. The air cap can realize the circulation of the flue gas, but it can prevent the water sprayed by the cooling sprinkler from flowing downward, and the water collected by the water collecting tray absorbs the smoke. After the heat of the air is absorbed, it enters from the heat medium inlet of the heat exchanger, and is recycled after heat exchange. The above-mentioned desulfurization device is provided with a packing layer under the cooling spray layer, which can prolong the contact between the water sprayed by the cooling spray head and the flue gas. The area and contact time can further improve the cooling effect on the flue gas, and can also make the liquid, dust, aerosol and other impurities contained in the flue gas better absorbed by the cooling water and improve the quality of flue gas emissions.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit the protection scope of the present utility model. It should be understood that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. In a desulfurization tower, spraying cooling water and outside process disposal device, it is characterized in that, in described desulfurization tower spray cooling water and outside process disposal device comprise desulfurization tower and heat exchange unit; Described desulfurization tower The tower is provided with a desulfurization liquid outlet, a flue gas inlet, a desulfurization spray layer, a water collecting layer, a packing layer, a cooling spray layer, a mist eliminator and a flue gas outlet in sequence from bottom to top, and the desulfurization spray layer is provided with a desulfurization spray layer. Shower head, the water collection layer is provided with a water collection tray, the surrounding edges of the water collection tray are fixedly connected with the inner wall of the desulfurization tower, and the water collection tray is provided with through holes that penetrate up and down and communicate with the through holes. The air cap is fitted with holes, the bottom of the water collecting tray is provided with a water outlet, and the cooling spray layer is provided with a cooling spray head; the heat exchange unit includes a heat exchanger, and the heat exchanger has a heat medium inlet, Heat medium outlet, refrigerant inlet and refrigerant outlet, the heat medium inlet of the heat exchanger is connected with the water outlet pipeline at the bottom of the water collecting tray, and the heat medium outlet of the heat exchanger is connected with the cooling sprinkler pipe road connection. 2. The desulfurization tower spraying, cooling and water collecting and the process disposal device outside the tower according to claim 1, wherein the gas cap comprises a gas cap tube and a gas cap cover, and the gas cap tube does not have an upper and lower bottom surface. The air cap is connected to the through hole and extends above the water collecting tray, and the air cap is fixed above the air cap and between the air cap and the air cap. Leaving a ventilation gap, the vertical projection of the air cap cover masks the vertical projection of the air cap barrel. 3. The desulfurization tower spraying, cooling, and water collecting and the process treatment device outside the tower according to claim 1, wherein the heat exchange unit further comprises a buffer water tank, and the heat medium inlet of the heat exchanger is connected to the outside of the tower. The buffer water tank is in pipeline communication, the buffer water tank is in communication with the water outlet pipeline of the water collecting tray, and a water pump is connected to the pipeline between the heat medium inlet of the heat exchanger and the buffer water tank. 4. The desulfurization tower spraying, cooling, and water collecting and the process disposal device outside the tower according to claim 3, wherein the buffer water tank is provided with a water inlet, a process water supply port, an overflow port, an emptying port, A water outlet and a liquid level gauge, the water inlet of the buffer water tank is connected with the water outlet pipeline of the water collecting tray, and the water outlet of the buffer water tank is connected with the heat medium inlet pipeline of the heat exchanger. 5. The device according to claim 4, characterized in that the liquid level gauge is an ultrasonic level gauge, a magnetic flap level gauge or a differential pressure level gauge. count. 6. The desulfurization tower inner spray cooling water collection and the tower outside process disposal device according to claim 1 is characterized in that, the desulfurization liquid outlet of the desulfurization tower is communicated with the desulfurization spray head through pipelines, and the A slurry circulation pump is connected to the pipeline between the desulfurization liquid outlet of the desulfurization tower and the desulfurization spray head. 7. The device according to claim 1, characterized in that the heat exchanger is a liquid-liquid heat exchanger or a gas-liquid heat exchanger. 8. The device according to claim 1, characterized in that the packing material of the packing layer is glass fiber reinforced plastic, ceramics or stainless steel. 9. The desulfurization tower inner spray cooling water collection and the tower outer process disposal device according to claim 1, is characterized in that, the pipeline between the heat medium outlet of the heat exchanger and the cooling spray head is provided with a A first electric valve, a first flow meter, a first temperature transmitter, a first pressure transmitter, a first on-site thermometer and a first on-site pressure gauge. 10. The device according to claim 1, characterized in that, on the pipeline between the heat medium inlet of the heat exchanger and the water outlet of the water collecting tray A second electric valve, a second flow meter, a second thermometer and a second temperature transmitter are provided.

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