CN114602306A - Sulfur-containing waste gas treatment system - Google Patents

Sulfur-containing waste gas treatment system Download PDF

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Publication number
CN114602306A
CN114602306A CN202210281126.5A CN202210281126A CN114602306A CN 114602306 A CN114602306 A CN 114602306A CN 202210281126 A CN202210281126 A CN 202210281126A CN 114602306 A CN114602306 A CN 114602306A
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CN
China
Prior art keywords
liquid recovery
sulfur
recovery device
waste gas
exhaust port
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CN202210281126.5A
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Chinese (zh)
Inventor
林海川
方惠良
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Changshu Hongzhi Storage Co ltd
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Changshu Hongzhi Storage Co ltd
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Priority to CN202210281126.5A priority Critical patent/CN114602306A/en
Publication of CN114602306A publication Critical patent/CN114602306A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation

Abstract

The application relates to a sulfur-containing waste gas treatment system, which comprises a water washing cooling tower, a desulfurizing tower and an exhaust chimney; the washing cooling tower comprises a first air inlet and a first exhaust port, the bottom of the washing cooling tower is connected with a first liquid recovery device, and the first liquid recovery device is communicated with a first spraying device. The desulfurizing tower includes second air inlet and second gas vent, the first gas vent of second air inlet intercommunication, and the bottom of desulfurizing tower is connected with second liquid recovery device, second liquid recovery device intercommunication second spray set. The exhaust chimney is communicated with the second exhaust port. Wherein, the first liquid recovery device and the second liquid recovery device are both provided with a slag discharge device. The sulfur-containing waste gas is washed in sequence by arranging the water washing cooling tower and the desulfurizing tower, and the first liquid recovery device and the second liquid recovery device are respectively arranged on the water washing cooling tower and the desulfurizing tower, so that water and alkali liquor can be recycled, and the sulfur-containing waste gas is absorbed to the greatest extent on the basis of saving energy consumption.

Description

Sulfur-containing waste gas treatment system
Technical Field
The application relates to the technical field of waste gas treatment, in particular to a sulfur-containing waste gas treatment system.
Background
Liquid sulfur can produce sulphur waste gas (sulphur steam, sulphur dust and sulphur compound) at loading and storage tank in-process, influences the healthy of people, and the waste gas of loss also can cause the corruption to production operation equipment surface. The sulfur-containing waste gas is volatile, easy to diffuse and large in pungent smell, and can possibly have adverse effects on the respiratory system, the digestive system, the endocrine system, the nervous system and the spirit of people, and even high-concentration sulfur-containing waste gas can cause acute poisoning and death, so that the sulfur-containing waste gas treatment method has great social value.
Disclosure of Invention
Based on this, it is necessary to provide a sulfur-containing waste gas treatment system, aiming at solving the problem of low sulfur-containing waste gas treatment rate in the prior art.
The application provides a sulfur-containing waste gas treatment system, which comprises a water washing cooling tower, a desulfurizing tower and an exhaust chimney; the water washing cooling tower comprises a first air inlet and a first exhaust port, a first spraying device is arranged between the first air inlet and the first exhaust port, the first spraying device is communicated with an external water pipe, the bottom of the water washing cooling tower is connected with a first liquid recovery device, and the first liquid recovery device is communicated with the first spraying device. The desulfurizing tower includes second air inlet and second gas vent, the second air inlet intercommunication first gas vent, the second air inlet with be equipped with second spray set between the second gas vent, second spray set intercommunication alkali lye charge device, the bottom of desulfurizing tower is connected with second liquid recovery unit, second liquid recovery unit intercommunication second spray set. The exhaust chimney is communicated with the second exhaust port. And slag discharge devices are arranged in the first liquid recovery device and the second liquid recovery device.
The sulfur-containing waste gas is washed in sequence by arranging the water washing cooling tower and the desulfurizing tower, and the first liquid recovery device and the second liquid recovery device are respectively arranged on the water washing cooling tower and the desulfurizing tower, so that water and alkali liquor can be recycled, and the sulfur-containing waste gas is absorbed to the greatest extent on the basis of saving energy consumption. And all be equipped with the sediment device through in first liquid recovery unit and second liquid recovery unit, can avoid the solid sediment in first liquid recovery unit and the second liquid recovery unit to influence the recycle of water and alkali lye, avoid becoming the jam of first spray set and second spray set.
The technical solution of the present application is further described below:
in any embodiment, a first demister is disposed between the first spray device and the first exhaust port; and a second demister is arranged between the second spraying device and the second exhaust port.
In any embodiment, the first demister and the second demister are both baffle demisters.
In any embodiment, a first filler is disposed between the first gas inlet and the first spray device; and a second filler is arranged between the second air inlet and the second spraying device.
In any embodiment, the first filler and the second filler are both polypropylene fillers.
In any embodiment, the first liquid recovery device comprises a first filter plate, the first filter plate divides the first liquid recovery device into a first upper cavity and a first lower cavity, the first upper cavity is communicated with the water washing cooling tower, and the first lower cavity is communicated with the first spraying device through a first water pump; the second liquid recovery device comprises a second filter plate, the second filter plate divides the second liquid recovery device into a second upper-layer cavity and a second lower-layer cavity, the second upper-layer cavity is communicated with the desulfurizing tower, and the second lower-layer cavity is communicated with the second spraying device through a second water pump.
In any embodiment, the two slag discharging devices are respectively located inside the first upper cavity and the second upper cavity, each slag discharging device comprises a conveying belt and a scraper connected to the surface of the conveying belt, the conveying belt rotates along a preset direction and drives the scrapers to scrape solid precipitates on the surfaces of the first filtering plate and the second filtering plate, and the conveying belts extend to the outside of the first liquid recovery device or the second liquid recovery device.
In any embodiment, the first exhaust port and the second air inlet are connected through a first pipeline, the second exhaust port and the exhaust chimney are connected through a second pipeline, and the second pipeline is provided with a fan.
In any embodiment, the first and second spray devices each comprise a helical nozzle.
In any embodiment, the exhaust stack has a height of no less than 15 m.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of a sulfur-containing off-gas treatment system according to an embodiment of the present application.
Description of reference numerals:
100. a sulfur-containing waste gas treatment system; 1. washing the cooling tower with water; 2. a desulfurizing tower; 3. an exhaust stack; 4. a first demister; 5. a first spraying device; 6. a first filler; 7. a first liquid recovery device; 9. a first filter plate; 10. a slag discharge device; 11. a first water pump; 12. a second demister; 13. a second spraying device; 14. a second filler; 15. a second liquid recovery device; 16. a first conduit; 17. a second filter plate; 18. a second conduit; 19. a second water pump; 20. an external water pipe; 21. an alkali liquor dosing device; 211. an alkali liquor feeding port; 212. a process water feeding port; 22. a third water pump; 23. a fan.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the embodiments disclosed below.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the term "and/or" is only one kind of association relation describing an associated object, and means that three kinds of relations may exist, for example, a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Preferred embodiments of the present application will be described below with reference to the accompanying drawings.
As shown in fig. 1, a sulfur-containing waste gas treatment system 100 for treating sulfur-containing waste gas is shown in an embodiment of the present application, and includes a water-washing cooling tower 1, a desulfurization tower 2, and an exhaust stack 3. The water washing cooling tower 1 comprises a first air inlet and a first exhaust port, a first spraying device 5 is arranged between the first air inlet and the first exhaust port, the first spraying device 5 is communicated with an external water pipe 20, the bottom of the water washing cooling tower 1 is connected with a first liquid recovery device 7, and the first liquid recovery device 7 is communicated with the first spraying device 5. Desulfurizing tower 2 includes second air inlet and second gas vent, and the first gas vent of second air inlet intercommunication is equipped with second spray set 13 between second air inlet and the second gas vent, and second spray set 13 intercommunication alkali lye charge device 21, and the bottom of desulfurizing tower 2 is connected with second liquid recovery unit 15, and second liquid recovery unit 15 communicates second spray set 13. The exhaust stack 3 communicates with the second exhaust port. Wherein, the first liquid recovery device 7 and the second liquid recovery device 15 are both provided with a slag discharge device 10.
Since the sulfur-containing off-gas has a low density, it flows from bottom to top in both the water-washing cooling tower 1 and the desulfurization tower 2. Therefore, when the first intake port, the second intake port, the first exhaust port, and the second exhaust port are provided, it is necessary that the first exhaust port is located higher than the first intake port, and the second exhaust port is located higher than the first exhaust port. As shown in fig. 1, a first gas inlet and a second gas inlet may be provided at the bottom of the water washing cooling tower 1 and the desulfurization tower 2, respectively, and a first gas outlet and a second gas outlet may be provided at the top of the water washing cooling tower 1 and the desulfurization tower 2, respectively.
In some embodiments, the first liquid recovery device 7 and the second liquid recovery device 15 may be in communication with an external conduit for wastewater recovery treatment.
The sulfur-containing waste gas enters the water washing cooling tower 1 from the first air inlet, flows from bottom to top, passes through the first spraying device 5, is cooled by water, and partial sulfur in the sulfur-containing waste gas is desublimated into solid, and dust and the like carried in the sulfur-containing waste gas can be stripped from the sulfur-containing waste gas by using water. The remaining sulfur-containing waste gas contains acidic gas, the sulfur-containing waste gas flows from the first exhaust port to the second air inlet to enter the desulfurizing tower 2, flows from bottom to top, passes through the second spraying device 13, and the acidic gas in the sulfur-containing waste gas and the sprayed alkali liquor undergo a neutralization reaction to generate salt and water. Due to the higher temperature, the water mist and the residual unreacted sulfurous waste gas flow together from the second exhaust port to the exhaust stack 3 to be discharged. At this time, part of sulfur in the sulfur-containing waste gas is precipitated in the first liquid recovery device 7 as a solid, and part of sulfur ions as an acid gas is subjected to a neutralization reaction with an alkali solution to generate salt and water. The residual sulfur content in the sulfur-containing waste gas reaches the emission standard.
The liquid inlet end of the first spraying device 5 is communicated with an external water pipe 20, and the external water pipe 20 is used for providing water for spraying for the first spraying device 5. The first liquid recovery device 7 is also communicated with the liquid inlet end of the first spraying device 5 and is used for recovering and conveying the water sprayed by the first spraying device 5 to the first spraying device 5 so as to realize water circulation. The liquid inlet end of the second spraying device 13 is communicated with an alkali liquor dosing device 21, and the alkali liquor dosing device 21 is used for providing alkali liquor for the second spraying device 13. The second liquid recovery device 15 is also communicated with the liquid inlet end of the second spraying device 13 and is used for recovering the alkali liquor sprayed by the second spraying device 13 and conveying the recovered alkali liquor to the second spraying device 13, so that circulation of the alkali liquor is realized. Water circulation and alkali liquor circulation are respectively realized through the first liquid recovery device 7 and the second liquid recovery device 15, so that the waste gas treatment cost is reduced.
Alkali liquor charge device 21 is used for providing alkali liquor for second spray set 13, and it can be equipped with that alkali liquor comes material mouth 211 and process water to come material mouth 212, and alkali liquor comes material mouth and process water to come the material mouth and connects outside alkali liquor pipe and outside water pipe respectively, and alkali liquor charge device 21 is inside can stir the mixture in order to mix alkali liquor and process water, forms the alkali liquor of certain proportion, can realize continuously supplying alkali liquor for second spray set 13.
Solids such as dust may be entrained in the sulfur-containing waste gas, and during the treatment of the sulfur-containing waste gas, the dust generated from the sulfur-containing waste gas and the solid sulfur desublimated by water cooling may fall from the bottom of the water-washing cooling tower 1 into the first liquid recovery device 7 and be deposited in the first liquid recovery device 7. Through set up sediment device 10 in first liquid recovery unit 7, can shift sedimentary dust and the solid sulphur that is cooled the water and desublimated to the outside of first liquid recovery unit 7, prevent that dust and the solid sulphur that is cooled the water and desublimated to the water from being retrieved and carrying to first spray set 5 by first liquid recovery unit 7 and causing first spray set 5 to block up.
The acid gas in the sulfur-containing waste gas and the sprayed alkali liquor are subjected to neutralization reaction in the desulfurizing tower 2 to generate salt and water. Wherein the salt is precipitated as a solid, falls into the second liquid recovery device 15 from the bottom of the desulfurization tower 2, and is deposited in the second liquid recovery device 15. By arranging the slag discharging device 10 in the second liquid recovery device 15, the deposited salt can be transferred to the outside of the second liquid recovery device 15, and the salt is prevented from being recovered by the second liquid recovery device 15 and conveyed to the second spraying device 13 to cause the blockage of the second spraying device 13.
Wash the sulphur-containing waste gas in proper order through setting up water scrubbing cooling tower 1 and desulfurizing tower 2 to set up first liquid recovery unit 7 and second liquid recovery unit 15 respectively at water scrubbing cooling tower 1 and desulfurizing tower 2, realize that water and alkali lye can recycle, furthest realizes the absorption to the sulphur-containing waste gas on the basis of practicing thrift the energy consumption. And moreover, the slag discharging devices 10 are arranged in the first liquid recovery device 7 and the second liquid recovery device 15, so that the solid precipitates in the first liquid recovery device 7 and the second liquid recovery device 15 can be prevented from influencing the recovery and use of water and alkali liquor, and the blockage of the first spraying device 5 and the second spraying device 13 is avoided.
Referring to fig. 1, according to some embodiments of the present application, a first demister 4 is optionally disposed between the first spray device 5 and the first exhaust port; a second demister 12 is arranged between the second spraying device 13 and the second exhaust port.
The first demister 4 and the second demister 12 are used for separating dust or dust so as to achieve the purpose of flue gas desulfurization. In the embodiment shown in fig. 1, a first gas inlet, a first shower device 5, a first demister 4, and a first exhaust port are provided in the water-wash cooling tower 1 from bottom to top along the flow path of the sulfur-containing off-gas. Along the flow path of the sulfur-containing waste gas, a second air inlet, a second spraying device 13, a second demister 12 and a second air outlet are arranged in the desulfurizing tower 2 from bottom to top.
According to some embodiments of the present application, optionally, the first demister 4 and the second demister 12 are both baffle demisters.
The baffle type demister has a plurality of forms and is divided into a V-shaped baffle plate, a sine wave-shaped baffle plate and the like according to the appearance; the installation form is divided into a vertical type and a horizontal type. In the vertical flow structure, a flow guide groove device is generally arranged in the direction perpendicular to the flow channel at the protruding part of the baffle plate, so that separated liquid flows to the bottom of the device along the flow guide groove device.
When the gas containing the mist flows through the demister at a certain speed, due to the inertia impact effect of the gas, the mist collides with the baffle plate, and the collected liquid drops are large, so that the gravity generated by the liquid drops exceeds the resultant force of the rising force of the gas and the surface tension of the liquid, and the liquid drops are separated from the surface of the baffle plate. The multi-folding structure increases the possibility of mist to be captured, and the mist which is not removed is captured at the next turning position through the same action, so that the repeated action is realized, and the mist removal efficiency is greatly improved. After the gas passes through the baffle plate demister, the gas does not contain mist basically, and gas-liquid separation is realized, so that the gas purified by the demister flows upwards and is discharged after reaching the demisting requirement.
Referring to fig. 1, according to some embodiments of the present application, optionally, a first filler 6 is disposed between the first gas inlet and the first spray device 5; a second filler 14 is arranged between the second air inlet and the second spraying device 13.
The first filler 6 and the second filler 14 have the function of increasing the area thereof to allow the gas and liquid two-phase flow to be fully contacted without causing large resistance, so as to achieve good exhaust gas purification effect.
In the embodiment shown in fig. 1, the first gas inlet, the first packing 6, the first shower device 5, the first demister 4, and the first exhaust port are provided in the water-wash cooling tower 1 from the bottom up along the flow path of the sulfur-containing off-gas. Along the flow path of the sulfur-containing waste gas, the desulfurization tower 2 is provided with a second gas inlet, a second filler 14, a second spraying device 13, a second demister 12 and a second gas outlet from bottom to top.
The sulfur-containing waste gas enters the water washing cooling tower 1 from the first air inlet, flows from bottom to top, passes through the first filler 6 below the first spraying device 5, is cooled by water as much as possible under the action of the first filler 6, forms solid sulfur, and can also strip dust and the like carried in the sulfur-containing waste gas from the sulfur-containing waste gas by using the water. The sulfur-containing off-gas passes through the first demister 4 to separate dust and the like carried in the sulfur-containing off-gas. The sulfur-containing waste gas flows from the first exhaust port to the second air inlet to enter the desulfurizing tower 2, flows from bottom to top, passes through the second filler 14 below the second spraying device 13, and acid gas in the sulfur-containing waste gas and sprayed alkali liquor are subjected to neutralization reaction as much as possible to generate salt and water. Due to the high temperature, the water mist and the residual unreacted sulfur-containing waste gas flow from the second exhaust port to the exhaust chimney 3 together after the solid particles or dust entrained therein are separated by the second demister 12 and discharged.
According to some embodiments of the present application, optionally, the first filler 6 and the second filler 14 are both polypropylene fillers.
The polypropylene filler (PP filler) is a biological filler prepared by using polypropylene as a main raw material, and has the advantages of high heat dissipation performance, small resistance, good water distribution and gas distribution performance, easy film growth and bubble cutting function. The structure is that the plastic wafer is changed into a double-ring large plastic ring by pressing and buckling, and the hydroformylation fiber or the polyester yarn is pressed on the ring of the ring, so that the fiber bundles are uniformly distributed; the inner ring is a snowflake-shaped plastic branch, so that the film can be hung, bubbles can be effectively cut, and the transfer rate and the utilization rate of oxygen are improved. The water-gas biomembrane is fully exchanged, and the organic matters in the water are efficiently treated.
Referring to fig. 1, according to some embodiments of the present application, optionally, the first liquid recovery device 7 includes a first filter plate 9, the first filter plate 9 divides the first liquid recovery device 7 into a first upper cavity and a first lower cavity, the first upper cavity is communicated with the water-washing cooling tower 1, and the first lower cavity is communicated with the first spraying device 5 through a first water pump 11; the second liquid recovery device 15 comprises a second filter plate 17, the second filter plate 17 divides the second liquid recovery device 15 into a second upper cavity and a second lower cavity, the second upper cavity is communicated with the desulfurizing tower 2, and the second lower cavity is communicated with the second spraying device 13 through a second water pump 19.
The dust possibly wrapped in the sulfur-containing waste gas is separated under the action of the water of the first spraying device 5 or the first demister 4, the first filter plate 9 is used for separating the separated dust and the water sprayed by the first spraying device 5, so that the dust is deposited in the first upper cavity, and the water is recycled to the first spraying device 5 from the first lower cavity through the first water pump 11 for recycling.
Acid gas in the sulfur-containing waste gas and sprayed alkali liquor are subjected to neutralization reaction in the desulfurizing tower 2 to generate solid salt, the second filter plate 17 is used for separating the generated solid salt from the alkali liquor sprayed by the second spraying device 13, so that the solid salt is deposited in the second upper-layer cavity, and the alkali liquor is recycled to the second spraying device 13 from the second lower-layer cavity through the second water pump 19 for recycling.
Referring to fig. 1, according to some embodiments of the present disclosure, optionally, two slag discharging devices 10 are respectively disposed inside the first upper cavity and the second upper cavity, the slag discharging devices 10 include a conveyor belt and a scraper (not shown) connected to a surface of the conveyor belt, the conveyor belt rotates in a predetermined direction and drives the scraper to scrape solid deposits on surfaces of the first filter plates 9 or the second filter plates 17, and the conveyor belt extends to an outside of the first liquid recycling device 7 or the second liquid recycling device 15.
The slag discharging device 10 is used to clean the dust deposited on the upper surface of the first filter plate 9 or the second filter plate 17 and the solid sulfur or solid salt desublimed by the water cooling. In the embodiment shown in fig. 1, the conveyor belt is in an obtuse triangle structure, wherein the bevel edge is obliquely and upwardly arranged relative to the first filter plate 9 or the second filter plate 17, and one of the other two sides is arranged in parallel with the first filter plate 9 and is located at a position where the hanging plate can scrape off the fixed sediment on the surface of the first filter plate 9 or the second filter plate 17. The rotation direction of the conveying belt is that the scraper at the inclined edge can move from bottom to top along the arrangement direction of the inclined edge. In some embodiments, in order to facilitate scraping of the solid deposits on the surface of the first filter plate 9 or the second filter plate 17, the scraper may be arranged obliquely with respect to the conveyor belt.
Referring to fig. 1, according to some embodiments of the present application, optionally, the first exhaust port and the second intake port are connected by a first duct 16, the second exhaust port is connected with the exhaust stack 3 by a second duct 18, and the second duct 18 is provided with a fan 23.
The water mist and the residual unreacted sulfur-containing waste gas flow to the exhaust chimney 3 from the second exhaust port through the second pipeline 18 together to be discharged, and the fan 23 can consume a part of the water mist, so that the discharge amount of mixed mist of the water mist and the sulfur-containing waste gas is reduced.
According to some embodiments of the present application, optionally, both the first and second spray devices 5, 13 comprise helical nozzles.
The spiral nozzle is a solid cone or hollow cone spray nozzle, and the spray angle can range from 50 degrees to 170 degrees. The liquid flow rate ranges from 5.5 to 4140 liters/minute. The spiral nozzle impact type dispersion spray has no structure inside the nozzle, is a smooth channel, and water flow passes through a layered interface of the impact spiral, so that the product is sprayed in layers, liquid can be completely atomized, the gas-liquid exchange area is large, and the absorption and purification are sufficient.
According to some embodiments of the present application, optionally the height of the exhaust stack 3 is not lower than 15m to achieve high altitude emissions.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present application, and are intended to be covered by the claims and the specification of the present application. In particular, the features mentioned in the embodiments can be combined in any manner, as long as no structural conflict exists. This application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (10)

1. A sulfur-containing waste gas treatment system, comprising:
the washing cooling tower comprises a first air inlet and a first exhaust port, a first spraying device is arranged between the first air inlet and the first exhaust port and is communicated with an external water pipe, and the bottom of the washing cooling tower is connected with a first liquid recovery device which is communicated with the first spraying device;
the desulfurizing tower comprises a second air inlet and a second exhaust port, the second air inlet is communicated with the first exhaust port, a second spraying device is arranged between the second air inlet and the second exhaust port and is communicated with an alkali liquor dosing device, the bottom of the desulfurizing tower is connected with a second liquid recovery device, and the second liquid recovery device is communicated with the second spraying device;
an exhaust chimney in communication with the second exhaust port;
and slag discharge devices are arranged in the first liquid recovery device and the second liquid recovery device.
2. The sulfur-containing off-gas treatment system of claim 1, wherein a first demister is provided between the first spraying device and the first exhaust port; and a second demister is arranged between the second spraying device and the second exhaust port.
3. The sulfur-containing waste gas treatment system of claim 2, wherein the first demister and the second demister are both baffle mist eliminators.
4. The sulfur-containing waste gas treatment system according to claim 1, wherein a first filler is provided between said first gas inlet and said first shower device; and a second filler is arranged between the second air inlet and the second spraying device.
5. The sulfur-containing waste gas treatment system according to claim 4, wherein the first filler and the second filler are both polypropylene fillers.
6. The sulfur-containing waste gas treatment system according to claim 1, wherein said first liquid recovery device comprises a first filter plate, said first filter plate dividing said first liquid recovery device into a first upper cavity and a first lower cavity, said first upper cavity communicating with said water-washing cooling tower, said first lower cavity communicating with said first spray device through a first water pump; the second liquid recovery device comprises a second filter plate, the second filter plate divides the second liquid recovery device into a second upper-layer cavity and a second lower-layer cavity, the second upper-layer cavity is communicated with the desulfurizing tower, and the second lower-layer cavity is communicated with the second spraying device through a second water pump.
7. The sulfur-containing waste gas treatment system according to claim 6, wherein two of said slag discharging devices are respectively located inside said first upper cavity and said second upper cavity, said slag discharging devices comprise a conveyor belt and a scraper attached to a surface of said conveyor belt, said conveyor belt rotates in a predetermined direction and drives said scraper to scrape solid deposits located on a surface of said first filter plate or said second filter plate, and said conveyor belt extends to an outside of said first liquid recovery device or said second liquid recovery device.
8. The sulfur-containing off-gas treatment system of claim 1, wherein the first exhaust port and the second intake port are connected by a first duct, the second exhaust port and an exhaust stack are connected by a second duct, and the second duct is provided with a fan.
9. The sulfur-containing off gas treatment system of claim 1, wherein the first and second spray devices each comprise a spiral nozzle.
10. The sulfur-containing off-gas treatment system of claim 1, wherein the height of the exhaust stack is not less than 15 m.
CN202210281126.5A 2022-03-22 2022-03-22 Sulfur-containing waste gas treatment system Pending CN114602306A (en)

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CN101306317A (en) * 2008-02-14 2008-11-19 娄爱娟 Tower top discharge type flue gas desulfurization method
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CN209696658U (en) * 2019-02-26 2019-11-29 北京皓天百能环保工程有限公司 A kind of wet high-effective desulfurization and dedusting double tower device
US20200299134A1 (en) * 2019-03-18 2020-09-24 Kunming University Of Science And Technology Gas-solid separating method and system for simple substance sulphur in sulphur-containing exhaust
CN113413680A (en) * 2021-07-14 2021-09-21 上海勘测设计研究院有限公司 Waste water purification device
CN214319684U (en) * 2021-06-24 2021-10-01 北京海淀中京工程设计软件技术有限公司 Deep purification device for sulfur recovery tail gas
CN113680200A (en) * 2021-09-06 2021-11-23 烟台新瑞环保科技有限公司 Iron chelate double-tower desulfurization process

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101219332A (en) * 2007-09-30 2008-07-16 泉州市天龙环境工程有限公司 Flue-gas desulfurizing and dust-removing apparatus of double-circulation boiler
CN101306317A (en) * 2008-02-14 2008-11-19 娄爱娟 Tower top discharge type flue gas desulfurization method
CN110115929A (en) * 2018-02-05 2019-08-13 宝塔国际石化工程技术有限公司 A kind of sulfur recovery facility sour gas alkali washing process
CN209696658U (en) * 2019-02-26 2019-11-29 北京皓天百能环保工程有限公司 A kind of wet high-effective desulfurization and dedusting double tower device
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