CN212663166U - A gas cleaning device for high sulphur high halogen hazardous waste burns - Google Patents

A gas cleaning device for high sulphur high halogen hazardous waste burns Download PDF

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Publication number
CN212663166U
CN212663166U CN202021599256.6U CN202021599256U CN212663166U CN 212663166 U CN212663166 U CN 212663166U CN 202021599256 U CN202021599256 U CN 202021599256U CN 212663166 U CN212663166 U CN 212663166U
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China
Prior art keywords
flue gas
tower
cooling tower
deacidification
alkaline
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CN202021599256.6U
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Chinese (zh)
Inventor
温俊明
金顺龙
刘朝阳
唐武
邵科
郑世杰
蒋雪玲
张晓博
周树宁
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Everbright Greentech Management Shenzhen Co ltd
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Everbright Greentech Management Shenzhen Co ltd
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Abstract

The utility model discloses a gas cleaning device for dangerous waste incineration of high sulphur high halogen, include: the dry deacidification tower is filled with a dry deacidification agent to neutralize acid gas in flue gas generated by burning high-sulfur high-halogen hazardous wastes; the dust remover is connected to the dry deacidification tower, and the flue gas enters the dust remover after passing through the dry deacidification tower so as to remove particulate matters in the flue gas; the flue gas enters the pre-cooling tower after passing through the dust remover, and the soluble gas in the flue gas is absorbed by spray water and the temperature of the flue gas is reduced; and the alkaline tower is connected to the pre-cooling tower and comprises a first-stage alkaline tower and a second-stage alkaline tower, the flue gas sequentially enters the first-stage alkaline tower and the second-stage alkaline tower after passing through the pre-cooling tower, and acid gas in the flue gas is removed by spraying alkali liquor. According to the utility model provides a flue gas purification device ensures long-term steady operation of flue gas purification device and flue gas emission to reach standard.

Description

A gas cleaning device for high sulphur high halogen hazardous waste burns
Technical Field
The utility model relates to a hazardous waste handles the field, particularly relates to a flue gas purification device that is used for high sulphur high halogen hazardous waste to burn.
Background
Hazardous waste is corrosive and infectious, and harmful substances contained in the hazardous waste can damage the ecological environment such as air, soil, water source and the like. With the development of science and technology, methods for treating hazardous wastes are increasing, including physical treatment, solidification treatment, incineration treatment, landfill treatment and the like, but no matter what treatment method is adopted, the principle of 'reduction, harmlessness and reclamation' is always adhered to in the treatment process.
At present, incineration is the most common hazardous waste treatment method in China. A large amount of smoke can be generated in the incineration process of the hazardous waste, the smoke needs to be treated, and the smoke can be discharged after reaching the standard. The content of sulfur and halogen in the hazardous waste subjected to incineration treatment is generally low, for example, the content of Cl element is about 3% and the content of S element is about 2% after the hazardous waste raw material is combined. With the rapid development of national economy, high-sulfur and high-halogen hazardous wastes increase, for example, the content of Cl element reaches 10% and the content of S element reaches 3% -5% after the hazardous waste raw materials are combined, so that the content of acid gas in flue gas generated by incineration is very high, which causes the corrosion of dust removal equipment and subsequent equipment, and the purified flue gas cannot reach the emission standard.
Therefore, there is a need for a flue gas purification device for incineration of high-sulfur and high-halogen hazardous wastes to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.
The utility model provides a flue gas purification device for dangerous waste incineration of high sulphur high halogen, include:
the dry deacidification tower is filled with a dry deacidification agent to neutralize acid gas in flue gas generated by burning high-sulfur high-halogen hazardous wastes;
the dust remover is connected to the dry deacidification tower, and the flue gas enters the dust remover after passing through the dry deacidification tower so as to remove particulate matters in the flue gas;
the flue gas enters the pre-cooling tower after passing through the dust remover, and the soluble gas in the flue gas is absorbed by spray water and the temperature of the flue gas is reduced;
and the alkaline tower is connected to the pre-cooling tower and comprises a first-stage alkaline tower and a second-stage alkaline tower, the flue gas sequentially enters the first-stage alkaline tower and the second-stage alkaline tower after passing through the pre-cooling tower, and acid gas in the flue gas is removed by spraying alkali liquor.
Further, the flue gas purification device further comprises:
the deacidification agent storage bin is used for storing the raw materials of the dry deacidification agent;
the grinder is arranged below the deacidification agent storage bin, is communicated with the deacidification agent storage bin and is used for grinding the raw materials of the dry deacidification agent into powder;
and the material conveying fan is used for conveying the powdery dry deacidification agent from the grinding machine to the dry deacidification tower.
Further, the dry deacidification agent comprises baking soda powder, wherein the baking soda powder has a size range of 400-700 meshes.
Further, the dry acid removal tower comprises:
the system comprises a flue gas inlet of a deacidification tower and a flue gas outlet of the deacidification tower, wherein the flue gas inlet of the deacidification tower is arranged at the lower part of the dry deacidification tower, and the flue gas outlet of the deacidification tower is arranged at the upper part of the dry deacidification tower, so that the flue gas passes through the dry deacidification tower from bottom to top;
the deacidification agent inlet is arranged at the throat of the dry deacidification tower and is positioned between the flue gas inlet of the deacidification tower and the flue gas outlet of the deacidification tower so as to enable the flue gas to be fully contacted with the dry deacidification agent.
Further, the dust remover comprises a bag-type dust remover.
Further, the flue gas purification device further comprises: and the induced draft fan is arranged between the dust remover and the pre-cooling tower and used for conveying the flue gas to the pre-cooling tower.
Further, the pre-cooling tower comprises:
the device comprises a pre-cooling tower flue gas inlet and a pre-cooling tower flue gas outlet, wherein the pre-cooling tower flue gas inlet is arranged at the lower part of a pre-cooling tower, and the pre-cooling tower flue gas outlet is arranged at the top of the pre-cooling tower, so that the flue gas passes through the pre-cooling tower from bottom to top;
the pre-cooling tower spraying device is arranged at the upper part of the pre-cooling tower and is used for spraying water into the pre-cooling tower so as to ensure that the flue gas is fully contacted with the water;
and the pre-cooling tower circulating pump is arranged outside the pre-cooling tower and used for pumping the water at the bottom of the pre-cooling tower to the pre-cooling tower spraying device so as to realize the recycling of the water.
Further, the caustic tower comprises:
the device comprises an alkaline washing tower flue gas inlet and an alkaline washing tower flue gas outlet, wherein the alkaline washing tower flue gas inlet is arranged at the lower part of the alkaline washing tower, and the alkaline washing tower flue gas outlet is arranged at the top of the alkaline washing tower, so that the flue gas passes through the pre-cooling tower from bottom to top;
the alkaline washing tower spraying device is arranged at the upper part of the alkaline washing tower and is used for spraying alkaline liquor into the alkaline washing tower so as to ensure that the flue gas is fully contacted with the alkaline liquor;
and the alkali wash tower circulating pump is arranged outside the alkali wash tower and used for pumping alkali liquor at the bottom of the alkali wash tower to the alkali wash tower spraying device so as to realize the recycling of the alkali liquor.
Further, the readily soluble gas comprises hydrogen chloride.
Further, the lye comprises a sodium hydroxide solution.
According to the utility model provides a flue gas purification device for high sulphur high halogen hazardous waste burns through utilizing dry deacidification agent deacidification, and the particulate matter in the flue gas is got rid of to the rethread dust remover, and easily soluble gas and reduce temperature are got rid of to the rethread precooling tower, get rid of acid gas through two-stage alkaline tower at last to ensure long-term steady operation of flue gas purification device and flue gas discharge to reach standard.
Drawings
The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles of the invention.
In the drawings:
fig. 1 shows a schematic structural diagram of a flue gas purification device for high-sulfur high-halogen hazardous waste incineration according to an exemplary embodiment of the present invention.
Reference numerals
100 dry deacidification tower
200 dust remover
300 precooling tower
301 precooling tower spray set
302 precooling tower circulating pump
401 first grade alkaline washing tower
402 second grade alkaline washing tower
403 alkaline washing tower spray device
404 circulating pump of alkaline washing tower
501 deacidification agent storage bin
502 grinder
503 material conveying fan
600 induced draft fan
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
In order to thoroughly understand the present invention, a detailed description will be provided in the following description to illustrate the flue gas cleaning apparatus for high sulfur and high halogen hazardous waste incineration of the present invention. It is apparent that the practice of the invention is not limited to the specific details familiar to those skilled in the hazardous waste treatment art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.
It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same elements are denoted by the same reference numerals, and thus the description thereof will be omitted.
The hazardous waste incineration disposal system generally comprises a pretreatment unit, an incineration unit, a waste heat recovery unit, a flue gas purification unit and the like. In the pretreatment unit, the liquid, the sludge-like solid and the solid waste contained in the vessel are analyzed and treated, mixed according to indexes such as calorific value, presence or absence of halide, water content, etc., and controllably fed to the incineration unit. The incineration unit is used for incinerating hazardous waste to eliminate organic compounds and generated ash and gas residues to the maximum extent. The incineration unit generally comprises a rotary kiln and a secondary combustion chamber, wherein the rotary kiln is mainly used for vaporizing, decomposing and combusting most organic substances, and the secondary combustion chamber is mainly used for oxidizing all organic substances and waste gas, and the waste gas comprises combustible gas generated by incinerating hazardous waste in the rotary kiln. The waste heat recovery unit is mainly used for recovering heat in the flue gas, and can further utilize the heat to generate economic benefits (such as power generation). The flue gas purification unit is mainly used for purifying flue gas through various devices so that the discharged flue gas meets the domestic and foreign emission standards.
Acid gas content is very high in the flue gas to the dangerous waste incineration of high sulphur high halogen of prior art production, easily causes the corruption of dust collecting equipment and follow-up equipment to and the flue gas after the purification can not reach emission standard's the condition, the utility model provides a dangerous waste incineration's of high sulphur high halogen flue gas purification device, as shown in figure 1, include:
a dry deacidification tower 100, wherein a dry deacidification agent is introduced into the dry deacidification tower 100 to neutralize acid gas in flue gas generated by burning high-sulfur high-halogen hazardous waste;
the dust remover 200 is connected to the dry acid removal tower 100, and the flue gas enters the dust remover 200 after passing through the dry acid removal tower 100 so as to remove particulate matters in the flue gas;
the flue gas enters the pre-cooling tower 300 after passing through the dust remover 200, and the flue gas absorbs the soluble gas in the flue gas through spray water and reduces the temperature of the flue gas;
and the alkaline tower is connected to the pre-cooling tower 300 and comprises a first-stage alkaline tower 401 and a second-stage alkaline tower 402, the flue gas sequentially enters the first-stage alkaline tower 401 and the second-stage alkaline tower 402 after passing through the pre-cooling tower 300, and acid gas in the flue gas is removed by spraying alkaline liquor.
The dry deacidification process uses dry alkaline substances to neutralize acid gas, and the neutralized product is in a dry state. The dry deacidification process has the advantages of simple flow, low equipment investment cost, no wastewater generated in the process, low equipment failure rate and convenient maintenance.
Illustratively, a dry deacidification agent is introduced into the dry deacidification tower 100 to neutralize acid gases in flue gas generated by burning high-sulfur high-halogen hazardous wastes.
As shown in fig. 1, a tower body of the dry-method deacidification tower 100 is provided with a deacidification tower flue gas inlet and a deacidification tower flue gas outlet, wherein the deacidification tower flue gas inlet is arranged at the lower part of the dry-method deacidification tower, and the deacidification tower flue gas outlet is arranged at the upper part of the dry-method deacidification tower, so that the flue gas passes through the dry-method deacidification tower from bottom to top.
Further, a deacidification agent inlet is further arranged on the tower body of the dry deacidification tower 100, and the deacidification agent inlet is positioned between the flue gas inlet of the deacidification tower and the flue gas outlet of the deacidification tower so as to enable the flue gas to be fully contacted with the dry deacidification agent. Specifically, as shown in fig. 1, the deacidification agent inlet is arranged at the throat of the dry deacidification tower 100 so as to enable the flue gas to be fully contacted with the deacidification agent.
Illustratively, the dry deacidification agent comprises baking soda powder. Further, the baking soda powder has a size ranging from 400 mesh to 700 mesh. In one embodiment, the baking soda is reduced in size and increased in specific surface area by grinding to allow sufficient contact with the acid gases in the flue gas to increase the removal rate of the acid gases from the flue gas, preferably, the fineness of the ground baking soda is about 600 mesh.
The ground baking soda is a good deacidification absorbent, the absorption rate of the ground baking soda is higher than that of absorbents such as calcium base and the like, the baking soda is used for absorbing acid gas in flue gas and is a gas-solid phase reaction, the reaction speed is high, the utilization rate of the absorbents is high, and the desulfurization efficiency can reach more than 80%.
In order to supply the ground baking soda powder thereto, as shown in fig. 1, the flue gas cleaning apparatus provided by the present invention further comprises:
a deacidification agent storage bin 501 for storing the raw material of the dry deacidification agent;
a grinder 502 disposed below the deacidification agent storage bin 501 and communicated with the deacidification agent storage bin 501, for grinding the raw material of the dry deacidification agent into powder;
a material conveying fan 503, configured to convey the powdery dry deacidification agent from the grinder 502 to the dry deacidification tower 100.
In one embodiment, the baking soda raw material stored in the deacidification agent storage bin 501 is supplied into a grinder 502 which is arranged below the deacidification agent storage bin 501 and communicated with the deacidification agent storage bin 501, grinding is carried out in the grinder 502 so that the granularity of the baking soda reaches a target size (for example, 400 meshes-700 meshes), and ground baking soda powder is sent into the dry deacidification tower 100 through a deacidification agent inlet on the dry deacidification tower 100 by a material conveying fan 503 and is fully contacted with flue gas generated by burning high-sulfur high-halogen hazardous waste so as to neutralize the acid gas in the flue gas.
Illustratively, a dust remover 200 is connected to the dry acid removal tower 100, and the flue gas enters the dust remover 200 after passing through the dry acid removal tower 100 to remove particulate matters in the flue gas. As an example, the dust collector 200 includes a bag-type dust collector, the flue gas discharged from the dry deacidification tower 100 contains a large amount of particulate matters, including dust generated by burning hazardous waste, deacidification products generated by reacting baking soda powder with acid gas, unreacted baking soda powder and the like, and the bag-type dust collector collects the particulate matters in the flue gas and can further send the flue gas to a fly ash bin (not shown) for storage.
Because most of strong acid gas is removed by using the baking soda in the prior dry deacidification process, the operation temperature of the flue gas can be ensured to be above the acid dew point, the high-temperature corrosion of the bag-type dust remover in the dust removal process is prevented, and the service life of the bag-type dust remover is prolonged.
Exemplarily, the utility model provides a flue gas purification device still includes draught fan 600, draught fan 600 sets up the dust remover 200 with between the precooling tower 300, be used for with the flue gas is followed the dust remover 200 is carried to in the precooling tower 300.
Illustratively, the pre-cooling tower 300 is used to absorb the easily soluble gases in the flue gas and reduce the temperature of the flue gas using water.
As shown in fig. 1, a pre-cooling tower flue gas inlet and a pre-cooling tower flue gas outlet are arranged on a tower body of the pre-cooling tower 300, wherein the pre-cooling tower flue gas inlet is arranged at the lower part of the pre-cooling tower 300, and the pre-cooling tower flue gas outlet is arranged at the top of the pre-cooling tower 300, so that the flue gas passes through the pre-cooling tower 300 from bottom to top.
Further, a pre-cooling tower spray device 301 is further arranged in the pre-cooling tower 300, and the pre-cooling tower spray device 301 is arranged at the upper part of the pre-cooling tower and is used for spraying water into the pre-cooling tower 300 so that the flue gas is fully contacted with the water.
Illustratively, the pre-cooling tower spray arrangement 301 comprises a multi-layer arrangement, each layer comprising a number of spray openings, and the number of spray openings in each layer may be the same or different. In one embodiment, the pre-cooling tower spray device 301 comprises three layers, each layer comprises 8-12 spray openings, and the spray openings of different layers are arranged in a staggered manner, so that the flue gas is fully contacted with the spray water.
Further, the pre-cooling tower 300 further comprises a pre-cooling tower circulating pump 302, wherein the pre-cooling tower circulating pump 302 is arranged outside the pre-cooling tower 300 and used for pumping water at the bottom of the pre-cooling tower 300 to the pre-cooling tower spraying device 301 so as to realize the recycling of the water.
In one embodiment, the water used in the pre-cooling tower 300 is industrial water, and when the flue gas enters from the flue gas inlet of the pre-cooling tower under the action of the induced draft fan 600 and passes through the pre-cooling tower 300 from bottom to top, the flue gas is in countercurrent contact with the industrial water sprayed by the spraying device 301 of the pre-cooling tower, so that on one hand, 90% of soluble gases (such as hydrogen chloride gas and the like) in the flue gas can be removed, a large amount of salt-containing aerosol is prevented from being formed in the subsequent alkali washing process, on the other hand, the temperature of the flue gas can be reduced to below 70 ℃, and the absorption efficiency.
Illustratively, the caustic tower comprises a primary caustic tower 401 and a secondary caustic tower 402 for removing acid gases from the flue gas with a caustic solution.
As shown in fig. 1, each alkaline washing tower comprises an alkaline washing tower flue gas inlet and an alkaline washing tower flue gas outlet, the alkaline washing tower flue gas inlet is arranged at the lower part of the alkaline washing tower, and the alkaline washing tower flue gas outlet is arranged at the top of the alkaline washing tower, so that the flue gas passes through the pre-cooling tower from bottom to top.
Further, the alkaline washing towers each comprise an alkaline washing tower spraying device 403, and the alkaline washing tower spraying devices 403 are arranged at the upper parts of the alkaline washing towers and used for spraying alkaline liquor into the alkaline washing towers so that the flue gas is fully contacted with the alkaline liquor.
Illustratively, the caustic tower spray arrangement 403 comprises a multi-layer arrangement, each layer comprising a number of spray openings, and the number of spray openings in each layer may be the same or different. In one embodiment, the caustic tower spray unit 403 comprises three layers, each layer comprising 8-12 spray openings, and the spray openings of the different layers are staggered to allow sufficient contact between the flue gas and the sprayed caustic.
Further, the alkaline washing towers each comprise an alkaline washing tower circulating pump 404, and the alkaline washing tower circulating pump 404 is arranged outside the alkaline washing tower and used for pumping the alkaline liquor at the bottom of the alkaline washing tower to the alkaline washing tower spraying device so as to realize the recycling of the alkaline liquor.
In one embodiment, the alkali liquor is sodium hydroxide solution, and when flue gas enters from a flue gas inlet of the alkaline tower of the primary alkaline tower 401 and passes through the primary alkaline tower 401 from bottom to top, the flue gas is in countercurrent contact with the alkali liquor sprayed by the alkaline tower spraying device 403 to remove acid gas in the flue gas; then, the flue gas enters from a flue gas inlet of the alkaline washing tower 402 of the second-level alkaline washing tower, and when passing through the second-level alkaline washing tower 402 from bottom to top, the flue gas is in countercurrent contact with the alkali liquor sprayed by the spraying device 403 of the alkaline washing tower, so as to further remove the acid gas in the flue gas and ensure that the flue gas reaches the emission standard.
Through setting up two-stage alkaline washing tower, increased the circulation multiplying power of alkali lye relatively, improved deacidification efficiency, ensure that the flue gas that high sulphur high halogen hazardous waste burns and produces discharges up to standard.
In addition, the particulate matter in the flue gas can be further removed by spraying liquid in the pre-cooling tower 300 and the caustic washing tower.
According to the utility model provides a flue gas purification device for high sulphur high halogen hazardous waste burns through utilizing dry deacidification agent deacidification, and the particulate matter in the flue gas is got rid of to the rethread dust remover, and easily soluble gas and reduce temperature are got rid of to the rethread precooling tower, get rid of acid gas through two-stage alkaline tower at last to ensure long-term steady operation of flue gas purification device and flue gas discharge to reach standard.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A flue gas purification device for high-sulfur and high-halogen hazardous waste incineration, which is characterized by comprising:
the dry deacidification tower is filled with a dry deacidification agent to neutralize acid gas in flue gas generated by burning high-sulfur high-halogen hazardous wastes;
the dust remover is connected to the dry deacidification tower, and the flue gas enters the dust remover after passing through the dry deacidification tower so as to remove particulate matters in the flue gas;
the flue gas enters the pre-cooling tower after passing through the dust remover, and the soluble gas in the flue gas is absorbed by spray water and the temperature of the flue gas is reduced;
and the alkaline tower is connected to the pre-cooling tower and comprises a first-stage alkaline tower and a second-stage alkaline tower, the flue gas sequentially enters the first-stage alkaline tower and the second-stage alkaline tower after passing through the pre-cooling tower, and acid gas in the flue gas is removed by spraying alkali liquor.
2. The flue gas cleaning apparatus according to claim 1, further comprising:
the deacidification agent storage bin is used for storing the raw materials of the dry deacidification agent;
the grinder is arranged below the deacidification agent storage bin, is communicated with the deacidification agent storage bin and is used for grinding the raw materials of the dry deacidification agent into powder;
and the material conveying fan is used for conveying the powdery dry deacidification agent from the grinding machine to the dry deacidification tower.
3. The flue gas purification device according to claim 2, wherein the dry deacidification agent comprises baking soda powder having a size in the range of 400 mesh to 700 mesh.
4. The flue gas purification apparatus of claim 1, wherein the dry acid removal column comprises:
the system comprises a flue gas inlet of a deacidification tower and a flue gas outlet of the deacidification tower, wherein the flue gas inlet of the deacidification tower is arranged at the lower part of the dry deacidification tower, and the flue gas outlet of the deacidification tower is arranged at the upper part of the dry deacidification tower, so that the flue gas passes through the dry deacidification tower from bottom to top;
the deacidification agent inlet is arranged at the throat of the dry deacidification tower and is positioned between the flue gas inlet of the deacidification tower and the flue gas outlet of the deacidification tower so as to enable the flue gas to be fully contacted with the dry deacidification agent.
5. The flue gas purification apparatus of claim 1, wherein the dust separator comprises a cloth bag dust separator.
6. The flue gas cleaning apparatus according to claim 1, further comprising:
and the induced draft fan is arranged between the dust remover and the pre-cooling tower and used for conveying the flue gas to the pre-cooling tower from the dust remover.
7. The flue gas purification apparatus of claim 1, wherein the pre-cooling tower comprises:
the device comprises a pre-cooling tower flue gas inlet and a pre-cooling tower flue gas outlet, wherein the pre-cooling tower flue gas inlet is arranged at the lower part of a pre-cooling tower, and the pre-cooling tower flue gas outlet is arranged at the top of the pre-cooling tower, so that the flue gas passes through the pre-cooling tower from bottom to top;
the pre-cooling tower spraying device is arranged at the upper part of the pre-cooling tower and is used for spraying water into the pre-cooling tower so as to ensure that the flue gas is fully contacted with the water;
and the pre-cooling tower circulating pump is arranged outside the pre-cooling tower and used for pumping the water at the bottom of the pre-cooling tower to the pre-cooling tower spraying device so as to realize the recycling of the water.
8. The flue gas cleaning apparatus according to claim 1, wherein the caustic tower comprises:
the device comprises an alkaline washing tower flue gas inlet and an alkaline washing tower flue gas outlet, wherein the alkaline washing tower flue gas inlet is arranged at the lower part of the alkaline washing tower, and the alkaline washing tower flue gas outlet is arranged at the top of the alkaline washing tower, so that the flue gas passes through the pre-cooling tower from bottom to top;
the alkaline washing tower spraying device is arranged at the upper part of the alkaline washing tower and is used for spraying alkaline liquor into the alkaline washing tower so as to ensure that the flue gas is fully contacted with the alkaline liquor;
and the alkali wash tower circulating pump is arranged outside the alkali wash tower and used for pumping alkali liquor at the bottom of the alkali wash tower to the alkali wash tower spraying device so as to realize the recycling of the alkali liquor.
9. The flue gas purification apparatus of claim 1, wherein the readily soluble gas comprises hydrogen chloride.
10. The flue gas purification apparatus of claim 1, wherein the lye comprises a sodium hydroxide solution.
CN202021599256.6U 2020-08-03 2020-08-03 A gas cleaning device for high sulphur high halogen hazardous waste burns Active CN212663166U (en)

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CN202021599256.6U CN212663166U (en) 2020-08-03 2020-08-03 A gas cleaning device for high sulphur high halogen hazardous waste burns

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Application Number Priority Date Filing Date Title
CN202021599256.6U CN212663166U (en) 2020-08-03 2020-08-03 A gas cleaning device for high sulphur high halogen hazardous waste burns

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CN212663166U true CN212663166U (en) 2021-03-09

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