Chemical waste gas treatment device

Abstract

The utility model discloses a chemical waste gas treatment device, belongs to the technical field of chemical waste gas treatment, and solves the problems of low efficiency and incomplete treatment of an existing waste gas treatment method. The input end of the alkaline waste gas collecting induced draft fan is communicated with the alkaline waste gas collecting pipe, and the output end is communicated with the input end of the pickling tower. The output end of the pickling tower and the output end of the alkaline washing tower are both communicated with the input end of the biological treatment unit, the output end of the biological treatment unit is communicated with the input end of the activated carbon adsorption tower, the output end of the activated carbon adsorption tower is communicated with the input end of the air exhaust induced draft fan, and the output end of the air exhaust induced draft fan is communicated with the input end of the coal-fired boiler. The output end of the coal-fired boiler is communicated with the input end of the denitration unit, the output end of the denitration unit is communicated with the input end of the bag-type dust removal unit, the output end of the bag-type dust removal unit is communicated with the input end of the desulfurization unit, and the output end of the desulfurization unit is communicated with the input end of the cyclone. The chemical waste gas treatment device can efficiently and thoroughly treat chemical waste gas.

Description

Technical Field

[0001] This application relates to the field of chemical waste gas treatment technology, and in particular to a chemical waste gas treatment device. Background Technology

[0002] Currently, enterprises generate a large amount of harmful waste gas during production and processing. For example, chemical production processes produce waste gas containing hydrocarbons such as methane and benzene, as well as trace amounts of H2S. If these waste gases are discharged directly without treatment, they will cause serious environmental pollution. Traditional waste gas treatment methods often suffer from problems such as low efficiency and incomplete treatment. Utility Model Content

[0003] This application provides a chemical waste gas treatment device, which solves the problems of low efficiency and incomplete treatment in existing waste gas treatment methods.

[0004] This utility model provides a chemical waste gas treatment device, which includes an alkaline waste gas collection fan, an acid washing tower, an acid condensate circulation tank, an acid condensate circulation pump, an acid waste gas collection fan, an alkaline washing tower, an alkaline condensate circulation tank, an alkaline condensate circulation pump, a biological treatment unit, an activated carbon adsorption tower, an exhaust fan, a coal-fired boiler, a denitrification unit, a bag filter dust collector, a desulfurization unit, a hydrocyclone, and a centrifuge. The input end of the alkaline waste gas collection fan is connected to the alkaline waste gas collection pipe, and the output end is connected to the input end of the acid washing tower. The input end of the acid waste gas collection fan is connected to the acid waste gas collection pipe, and the output end is connected to the input end of the alkaline washing tower. The output ends of the acid washing tower and the alkaline washing tower are both connected to the input end of the biological treatment unit. The output end of the biological treatment unit is connected to the input end of the activated carbon adsorption tower, and the output end of the activated carbon adsorption tower is connected to the exhaust fan. The input end of the machine is connected to the output end of the exhaust fan and the input end of the coal-fired boiler. The output end of the coal-fired boiler is connected to the input end of the denitrification unit. The output end of the denitrification unit is connected to the input end of the bag filter unit. The output end of the bag filter unit is connected to the input end of the desulfurization unit. The output end of the desulfurization unit is connected to the input end of the hydrocyclone. The output end of the hydrocyclone is connected to the input end of the centrifuge. The output end of the centrifuge is connected to the drying and packaging system. The input end of the acid coagulation circulation tank is connected to the lower end of the acid washing tower, and the output end is connected to the input end of the acid coagulation circulation pump. The output end of the acid coagulation circulation pump is connected to the upper end of the acid washing tower. The input end of the alkali coagulation circulation tank is connected to the lower end of the alkali washing tower, and the output end is connected to the input end of the alkali coagulation circulation pump. The output end of the alkali coagulation circulation pump is connected to the upper end of the alkali washing tower.

[0005] In one possible implementation, the chemical waste gas treatment device further includes a pH adjusting tank; the output end of the acid coagulant circulation pump and the output end of the alkali coagulant circulation pump are both connected to the input end of the pH adjusting tank, and the output end of the pH adjusting tank is connected to the wastewater treatment unit.

[0006] In one possible implementation, the desulfurization unit includes a flue gas induced draft fan, a desulfurization tower, a cleaning liquid circulation pump, a circulating oxidation tank, a circulating oxidation pump, a water washing tank, a transfer pump, and a cleaning liquid circulation pipe. The input end of the flue gas induced draft fan is connected to the output end of the bag filter unit, and the output end is connected to the flue gas inlet of the desulfurization tower. The output end of the desulfurization tower is connected to the input end of the hydrocyclone. The input end of the circulating oxidation tank is connected to the output end of the lower liquid collector of the desulfurization tower via a gravity flow pipe, and the output end is connected to the input end of the circulating oxidation pump. The output end of the circulating oxidation pump is connected to the liquid inlet of the first-stage spray of the desulfurization tower via a circulating oxidation pipe. The input end of the cleaning liquid circulation pump is connected to the desulfurization tower, and the output end is connected to the input end of the cleaning liquid circulation pipe. The output end of the cleaning liquid circulation pipe is connected to the liquid inlet of the second-stage spray of the desulfurization tower. The output end of the water washing tank is connected to the input end of the transfer pump, and the output end of the transfer pump is connected to the liquid inlet of the third-stage spray of the desulfurization tower.

[0007] In one possible implementation, the desulfurization unit further includes an oxidation blower, an oxidation tank conveying pump, an external oxidation pool, and a first conveying pump; the output end of the oxidation blower is connected to the oxygen inlet of the circulating oxidation tank; the input end of the oxidation tank conveying pump is connected to the output end of the circulating oxidation tank, and the output end is connected to the input end of the external oxidation pool; the output end of the external oxidation pool is connected to the input end of the first conveying pump, and the output end of the first conveying pump is connected to the input end of the circulating oxidation pipe.

[0008] In one possible implementation, the chemical waste gas treatment device further includes an ammonium sulfate slurry conveying pump, a crystallization tank, and a crystallization conveying pump; the input end of the ammonium sulfate slurry conveying pump is connected to the output end of the desulfurization unit, and the output end is connected to the input end of the crystallization tank; the output end of the crystallization tank is connected to the input end of the crystallization conveying pump, and the output end of the crystallization conveying pump is connected to the input end of the hydrocyclone.

[0009] In one possible implementation, the chemical waste gas treatment device further includes a mixer; the mixer is disposed within the crystallization tank.

[0010] In one possible implementation, the chemical waste gas treatment device further includes a waste gas condensate collection tank, a waste gas condensate transfer pump, and a waste gas condensate pipe; the input end of the waste gas condensate pipe is connected between the output end of the exhaust fan and the input end of the coal-fired boiler, and the output end is connected to the input end of the waste gas condensate collection tank; the output end of the waste gas condensate collection tank is connected to the input end of the waste gas condensate transfer pump, and the output end of the waste gas condensate transfer pump is connected to the wastewater treatment unit.

[0011] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:

[0012] This utility model provides a chemical waste gas treatment device, which includes an alkaline waste gas collection fan, an acid washing tower, an acid condensate circulation tank, an acid condensate circulation pump, an acid waste gas collection fan, an alkaline washing tower, an alkaline condensate circulation tank, an alkaline condensate circulation pump, a biological treatment unit, an activated carbon adsorption tower, an exhaust fan, a coal-fired boiler, a denitrification unit, a bag filter dust collection unit, a desulfurization unit, a hydrocyclone, and a centrifuge. The input end of the alkaline waste gas collection fan is connected to the alkaline waste gas collection pipe, and the output end is connected to the input end of the acid washing tower. The input end of the acid waste gas collection fan is connected to the acid waste gas collection pipe, and the output end is connected to the input end of the alkaline washing tower. The outputs of both the acid washing tower and the alkaline washing tower are connected to the input of the biological treatment unit. The output of the biological treatment unit is connected to the input of the activated carbon adsorption tower. The output of the activated carbon adsorption tower is connected to the input of the exhaust fan. The output of the exhaust fan is connected to the input of the coal-fired boiler. The output of the coal-fired boiler is connected to the input of the denitrification unit. The output of the denitrification unit is connected to the input of the bag filter unit. The output of the bag filter unit is connected to the input of the desulfurization unit. The output of the desulfurization unit is connected to the input of the hydrocyclone. The output of the hydrocyclone is connected to the input of the centrifuge. The output of the centrifuge is connected to the drying and packaging system. The input of the acid coagulation circulation tank is connected to the lower end of the acid washing tower, and its output is connected to the input of the acid coagulation circulation pump. The output of the acid coagulation circulation pump is connected to the upper end of the acid washing tower. The input of the alkaline coagulation circulation tank is connected to the lower end of the alkaline washing tower, and its output is connected to the input of the alkaline coagulation circulation pump. The output of the alkaline coagulation circulation pump is connected to the upper end of the alkaline washing tower. The chemical waste gas treatment device provided in this application first removes acidic gases such as H2S and CH3SH in an alkaline scrubbing tower, and removes alkaline gases such as ammonia in an acid scrubbing tower. The odorous gases after chemical scrubbing are then fully adsorbed and degraded by microorganisms in the biological treatment unit. Next, activated carbon in the activated carbon adsorption tower removes organic matter such as non-methane hydrocarbons, ensuring the waste gas consistently meets standards. The waste gas is then transported to a coal-fired boiler for incineration by an exhaust fan. The flue gas after incineration enters a desulfurization unit for treatment, producing ammonium sulfate as a byproduct. The treated flue gas is then discharged, and the ammonium sulfate byproduct is packaged in a drying and packaging system. This application enables efficient and thorough treatment of chemical waste gas. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the chemical waste gas treatment device provided in the embodiments of this application.

[0015] Icons: 1-Alkaline waste gas collection induced draft fan; 2-Acid washing tower; 3-Acid condensate circulation tank; 4-Acid condensate circulation pump; 5-Acidic waste gas collection induced draft fan; 6-Alkaline washing tower; 7-Alkaline condensate circulation tank; 8-Alkaline condensate circulation pump; 9-Biological treatment unit; 10-Activated carbon adsorption tower; 11-Exhaust fan; 12-Waste gas condensate collection tank; 13-Waste gas condensate transfer pump; 14-Coal-fired boiler; 15-Denitrification unit; 16-Catalytic induced draft fan; 17-Bag filter dust collector unit; 18-Flue gas induced draft fan; 19-Desulfurization Tower; 20-Cleaning liquid circulation pump; 21-Oxidation blower; 22-Circulating oxidation tank; 23-Circulating oxidation pump; 24-Oxidation tank transfer pump; 25-External oxidation pool; 26-First transfer pump; 27-Water washing tank; 28-Transfer pump; 29-Ammonium sulfate slurry transfer pump; 30-Crystallization tank; 31-Agitator; 32-Crystallization transfer pump; 33-Cyclone separator; 34-Centrifuge; 35-pH adjustment tank; 36-Circulating oxidation pipe; 37-Gravity flow pipe; 38-Cleaning liquid circulation pipe; 39-Waste gas condensate pipe. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0017] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0018] like Figure 1As shown in the figure, this utility model embodiment provides a chemical waste gas treatment device, which includes an alkaline waste gas collection fan 1, an acid washing tower 2, an acid condensate circulation tank 3, an acid condensate circulation pump 4, an acid waste gas collection fan 5, an alkaline washing tower 6, an alkaline condensate circulation tank 7, an alkaline condensate circulation pump 8, a biological treatment unit 9, an activated carbon adsorption tower 10, an exhaust fan 11, a coal-fired boiler 14, a denitrification unit 15, a bag filter dust collection unit 17, a desulfurization unit, a hydrocyclone 33, and a centrifuge 34.

[0019] In this embodiment, the input end of the alkaline waste gas collection fan 1 is connected to the alkaline waste gas collection pipe, and the output end is connected to the input end of the acid washing tower 2. The input end of the acidic waste gas collection fan 5 is connected to the acidic waste gas collection pipe, and the output end is connected to the input end of the alkaline washing tower 6. The output ends of both the acid washing tower 2 and the alkaline washing tower 6 are connected to the input end of the biological treatment unit 9. The chemical waste gas treatment device provided in this application performs separation treatment based on the properties of the waste gas at the front end. Specifically, it collects and treats waste gas separately into acidic and alkaline types. Acidic gas is treated by the alkaline washing tower 6, and alkaline gas is treated by the acid washing tower 2. After treatment, the gases are mixed and then treated by the biological treatment unit 9.

[0020] In practical applications, the output end of the biological treatment unit 9 is connected to the input end of the activated carbon adsorption tower 10, the output end of the activated carbon adsorption tower 10 is connected to the input end of the exhaust fan 11, the output end of the exhaust fan 11 is connected to the input end of the coal-fired boiler 14, the output end of the coal-fired boiler 14 is connected to the input end of the denitrification unit 15, and the output end of the denitrification unit 15 is connected to the input end of the bag filter dust collection unit 17. Specifically, a catalytic exhaust fan 16 is connected between the output end of the denitrification unit 15 and the input end of the bag filter dust collection unit 17.

[0021] like Figure 1 As shown, the output end of the bag filter unit 17 is connected to the input end of the desulfurization unit, the output end of the desulfurization unit is connected to the input end of the hydrocyclone 33, the output end of the hydrocyclone 33 is connected to the input end of the centrifuge 34, and the output end of the centrifuge 34 is connected to the drying and packaging system. The chemical waste gas treatment device provided in this application first removes acidic gases such as H2S and CH3SH in the alkaline scrubbing tower 6, and removes alkaline gases such as ammonia in the acid scrubbing tower 2. The odorous gas after chemical washing is fully adsorbed and degraded by microorganisms in the biological treatment unit 9, and then organic matter such as non-methane hydrocarbons is removed by activated carbon adsorption in the activated carbon adsorption tower 10, ensuring that the waste gas stably meets the standards. Then, the waste gas is transported to the coal-fired boiler 14 for incineration by the exhaust fan 11. The flue gas after incineration enters the desulfurization unit for treatment and produces ammonium sulfate as a byproduct. The qualified flue gas is discharged, and the ammonium sulfate byproduct enters the drying and packaging system for packaging. This application can efficiently and thoroughly treat chemical waste gas.

[0022] like Figure 1 As shown, the input end of the acid coagulation circulation tank 3 is connected to the lower end of the acid washing tower 2, and the output end is connected to the input end of the acid coagulation circulation pump 4. The output end of the acid coagulation circulation pump 4 is connected to the upper end of the acid washing tower 2. In practical applications, after the alkaline gas enters the acid washing tower 2, the circulating liquid is evenly distributed by the water distribution pipe at the top of the acid washing tower 2, passing through the packing layer from top to bottom. The circulating liquid is stored in the acid coagulation circulation tank 3 and sprayed from top to bottom by the acid coagulation circulation pump 4, so that the alkaline gas and the circulating liquid come into counter-current contact, ensuring that the alkaline gas can fully contact the circulating liquid, thereby ensuring the purification effect of the alkaline gas.

[0023] Continue to refer to Figure 1 As shown, the inlet of the alkaline condensate circulation tank 7 is connected to the lower end of the alkaline scrubbing tower 6, and the outlet is connected to the inlet of the alkaline condensate circulation pump 8. The outlet of the alkaline condensate circulation pump 8 is connected to the upper end of the alkaline scrubbing tower 6. In practical applications, after the acidic gas enters the alkaline scrubbing tower 6, the circulating liquid is evenly distributed by the water distribution pipe at the top of the alkaline scrubbing tower 6, passing through the packing layer from top to bottom. The circulating liquid is stored in the alkaline condensate circulation tank 7 and sprayed from top to bottom by the alkaline condensate circulation pump 8, so that the acidic gas and the circulating liquid come into counter-current contact, ensuring that the acidic gas can fully contact the circulating liquid, thereby guaranteeing the purification effect of the acidic gas.

[0024] This utility model provides a chemical waste gas treatment device, which includes an alkaline waste gas collection fan 1, an acid washing tower 2, an acid condensate circulation tank 3, an acid condensate circulation pump 4, an acid waste gas collection fan 5, an alkaline washing tower 6, an alkaline condensate circulation tank 7, an alkaline condensate circulation pump 8, a biological treatment unit 9, an activated carbon adsorption tower 10, an exhaust fan 11, a coal-fired boiler 14, a denitrification unit 15, a bag filter dust collection unit 17, a desulfurization unit, a hydrocyclone 33, and a centrifuge 34. The input end of the alkaline waste gas collection fan 1 is connected to the alkaline waste gas collection pipe, and the output end is connected to the input end of the acid washing tower 2. The input end of the acid waste gas collection fan 5 is connected to the acid waste gas collection pipe, and the output end is connected to the input end of the alkaline washing tower 6. The output ends of both the acid washing tower 2 and the alkaline washing tower 6 are connected to the input end of the biological treatment unit 9. The output end of the biological treatment unit 9 is connected to the input end of the activated carbon adsorption tower 10. The output end of the activated carbon adsorption tower 10 is connected to the input end of the exhaust fan 11. The output end of the exhaust fan 11 is connected to the input end of the coal-fired boiler 14. The output end of the coal-fired boiler 14 is connected to the input end of the denitrification unit 15. The output end of the denitrification unit 15 is connected to the input end of the bag filter dust collector 17. The output end of the bag filter dust collector 17 is connected to the input end of the desulfurization unit. The output end of the desulfurization unit is connected to the input end of the hydrocyclone 33. The output end of the hydrocyclone 33 is connected to the input end of the centrifuge 34. The output end of the centrifuge 34 is connected to the drying and packaging system. The input end of the acid coagulation circulation tank 3 is connected to the lower end of the acid washing tower 2, and the output end is connected to the input end of the acid coagulation circulation pump 4. The output end of the acid coagulation circulation pump 4 is connected to the upper end of the acid washing tower 2. The input end of the alkaline condensate circulation tank 7 is connected to the lower end of the alkaline scrubbing tower 6, and the output end is connected to the input end of the alkaline condensate circulation pump 8. The output end of the alkaline condensate circulation pump 8 is connected to the upper end of the alkaline scrubbing tower 6. The chemical waste gas treatment device provided in this application first removes acidic gases such as H2S and CH3SH in the alkaline scrubbing tower 6, and removes alkaline gases such as ammonia in the acid scrubbing tower 2. The odorous gas after chemical washing is fully adsorbed and degraded by microorganisms in the biological treatment unit 9, and then removed by activated carbon adsorption in the activated carbon adsorption tower 10 to ensure stable compliance of the waste gas. The waste gas is then transported to the coal-fired boiler 14 for incineration by the exhaust fan 11. The flue gas after incineration enters the desulfurization unit for treatment and produces ammonium sulfate as a byproduct. The compliant flue gas is discharged, and the ammonium sulfate byproduct enters the drying and packaging system for packaging. This application can efficiently and thoroughly treat chemical waste gas.

[0025] In practical applications, this chemical waste gas treatment device also includes a pH adjusting tank 35. The output ends of both the acid coagulation circulation pump 4 and the alkali coagulation circulation pump 8 are connected to the input end of the pH adjusting tank 35, and the output end of the pH adjusting tank 35 is connected to the wastewater treatment unit. Specifically, when the pH value of the acid coagulation circulation tank 3 or the alkali coagulation circulation tank 7 does not meet the requirements, liquid for adjusting the pH value can be added to the acid coagulation circulation tank 3 or the alkali coagulation circulation tank 7 through the pH adjusting tank 35 to achieve pH adjustment.

[0026] In this embodiment, the desulfurization unit includes a flue gas induced draft fan 18, a desulfurization tower 19, a cleaning liquid circulation pump 20, a circulating oxidation tank 22, a circulating oxidation pump 23, a water washing tank 27, a transfer pump 28, and a cleaning liquid circulation pipe 38. The input end of the flue gas induced draft fan 18 is connected to the output end of the bag filter unit 17, and its output end is connected to the flue gas inlet of the desulfurization tower 19. The output end of the desulfurization tower 19 is connected to the input end of the hydrocyclone 33. The input end of the circulating oxidation tank 22 is connected to the output end of the lower accumulator of the desulfurization tower 19 via a gravity flow pipe 37, and its output end is connected to the input end of the circulating oxidation pump 23. The output end of the circulating oxidation pump 23 is connected to the liquid inlet of the primary spray of the desulfurization tower 19 via a circulating oxidation pipe 36. The input end of the cleaning liquid circulation pump 20 is connected to the desulfurization tower 19, and its output end is connected to the input end of the cleaning liquid circulation pipe 38. The output end of the cleaning liquid circulation pipe 38 is connected to the liquid inlet of the secondary spray of the desulfurization tower 19. The output end of the water washing tank 27 is connected to the input end of the transfer pump 28, and the output end of the transfer pump 28 is connected to the liquid inlet of the three-stage spray of the desulfurization tower 19. Specifically, the desulfurization unit can desulfurize the exhaust gas treated by the bag filter dust collector 17 to convert the sulfur dioxide in the exhaust gas into ammonium sulfate particles or other harmless substances, and discharge the qualified flue gas through the top exhaust port.

[0027] like Figure 1 As shown, the desulfurization unit also includes an oxidation blower 21, an oxidation tank conveying pump 24, an external oxidation pool 25, and a first conveying pump 26. The output end of the oxidation blower 21 is connected to the oxygen inlet of the circulating oxidation tank 22. The input end of the oxidation tank conveying pump 24 is connected to the output end of the circulating oxidation tank 22, and the output end is connected to the input end of the external oxidation pool 25. The output end of the external oxidation pool 25 is connected to the input end of the first conveying pump 26, and the output end of the first conveying pump 26 is connected to the input end of the circulating oxidation pipe 36. In practical applications, the oxidation blower 21, the oxidation tank conveying pump 24, the external oxidation pool 25, and the first conveying pump 26 can fully oxidize the slurry in the desulfurization tower 19. At the same time, the external oxidation pool 25 can also buffer the material in the desulfurization tower 19.

[0028] Continue to refer to Figure 1As shown, the chemical waste gas treatment device also includes an ammonium sulfate slurry transfer pump 29, a crystallization tank 30, and a crystallization transfer pump 32. The input end of the ammonium sulfate slurry transfer pump 29 is connected to the output end of the desulfurization unit, and the output end is connected to the input end of the crystallization tank 30. The output end of the crystallization tank 30 is connected to the input end of the crystallization transfer pump 32, and the output end of the crystallization transfer pump 32 is connected to the input end of the hydrocyclone 33. Specifically, the ammonium sulfate slurry transfer pump 29, the crystallization tank 30, and the crystallization transfer pump 32 can further concentrate the ammonium sulfate byproduct generated by the desulfurization unit.

[0029] In practical applications, this chemical waste gas treatment device also includes a mixer 31. The mixer 31 is installed inside the crystallization tank 30. The mixer 31 can promote uniform solution temperature, accelerate the crystallization process, improve crystal quality and uniformity, control crystal growth rate, and disperse impurities.

[0030] like Figure 1 As shown, the chemical waste gas treatment device also includes a waste gas condensate collection tank 12, a waste gas condensate transfer pump 13, and a waste gas condensate pipe 39. The input end of the waste gas condensate pipe 39 is connected between the output end of the exhaust fan 11 and the input end of the coal-fired boiler 14, and the output end is connected to the input end of the waste gas condensate collection tank 12. The output end of the waste gas condensate collection tank 12 is connected to the input end of the waste gas condensate transfer pump 13, and the output end of the waste gas condensate transfer pump 13 is connected to the wastewater treatment unit. In practical applications, exhaust gas carries some water vapor during pipeline transportation, resulting in condensate. Therefore, an exhaust gas condensate pipe 39 is connected between the output end of the exhaust fan 11 and the input end of the coal-fired boiler 14, and a condensate drain valve is installed on the exhaust gas condensate pipe 39 to periodically open the condensate drain valve and collect the condensate through the exhaust gas condensate pipe 39 into the exhaust gas condensate collection tank 12. When the condensate in the exhaust gas condensate collection tank 12 reaches a certain level, the condensate is transported to the sewage treatment unit by the exhaust gas condensate transfer pump 13.

[0031] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0032] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A chemical waste gas treatment device, characterized in that, It includes an alkaline waste gas collection fan (1), an acid washing tower (2), an acid condensate circulation tank (3), an acid condensate circulation pump (4), an acid waste gas collection fan (5), an alkaline washing tower (6), an alkaline condensate circulation tank (7), an alkaline condensate circulation pump (8), a biological treatment unit (9), an activated carbon adsorption tower (10), an exhaust fan (11), a coal-fired boiler (14), a denitrification unit (15), a bag filter dust collection unit (17), a desulfurization unit, a hydrocyclone (33), and a centrifuge (34); The input end of the alkaline waste gas collection fan (1) is connected to the alkaline waste gas collection pipe, and the output end is connected to the input end of the acid washing tower (2). The input end of the acidic waste gas collection fan (5) is connected to the acidic waste gas collection pipe, and the output end is connected to the input end of the alkaline washing tower (6). The output ends of the acid washing tower (2) and the alkaline washing tower (6) are both connected to the input end of the biological treatment unit (9). The output end of the biological treatment unit (9) is connected to the input end of the activated carbon adsorption tower (10). The output end of the activated carbon adsorption tower (10) is connected to the input end of the exhaust fan (11). The output end of the exhaust fan (11) is connected to the input end of the coal-fired boiler (14). The output end of the coal-fired boiler (14) is connected to the input end of the denitrification unit (15). The output end of the denitrification unit (15) is connected to the input end of the bag filter unit (17). The output end of the bag filter unit (17) is connected to the input end of the desulfurization unit. The output end of the desulfurization unit is connected to the input end of the hydrocyclone (33). The output end of the hydrocyclone (33) is connected to the input end of the centrifuge (34). The output end of the centrifuge (34) is connected to the drying and packaging system. The input end of the acid coagulation circulation tank (3) is connected to the lower end of the acid washing tower (2), the output end is connected to the input end of the acid coagulation circulation pump (4), and the output end of the acid coagulation circulation pump (4) is connected to the upper end of the acid washing tower (2). The input end of the alkaline condensate circulation tank (7) is connected to the lower end of the alkaline washing tower (6), the output end is connected to the input end of the alkaline condensate circulation pump (8), and the output end of the alkaline condensate circulation pump (8) is connected to the upper end of the alkaline washing tower (6).

2. The chemical waste gas treatment device according to claim 1, characterized in that, It also includes a pH adjustment tank (35); The output ends of the acid coagulation circulation pump (4) and the alkaline coagulation circulation pump (8) are both connected to the input end of the pH adjustment tank (35), and the output end of the pH adjustment tank (35) is connected to the sewage treatment unit.

3. The chemical waste gas treatment device according to claim 1, characterized in that, The desulfurization unit includes a flue gas induced draft fan (18), a desulfurization tower (19), a cleaning liquid circulation pump (20), a circulating oxidation tank (22), a circulating oxidation pump (23), a water washing tank (27), a transfer pump (28), and a cleaning liquid circulation pipe (38); The input end of the flue gas induced draft fan (18) is connected to the output end of the bag filter unit (17), the output end is connected to the flue gas inlet of the desulfurization tower (19), and the output end of the desulfurization tower (19) is connected to the input end of the cyclone separator (33). The input end of the circulating oxidation tank (22) and the output end of the lower liquid collector of the desulfurization tower (19) are connected through a gravity flow pipe (37), and the output end is connected to the input end of the circulating oxidation pump (23). The output end of the circulating oxidation pump (23) and the liquid inlet of the first-stage spray of the desulfurization tower (19) are connected through a circulating oxidation pipe (36). The input end of the cleaning fluid circulation pump (20) is connected to the desulfurization tower (19), and the output end is connected to the input end of the cleaning fluid circulation pipe (38). The output end of the cleaning fluid circulation pipe (38) is connected to the liquid inlet of the secondary spray of the desulfurization tower (19). The output end of the water washing tank (27) is connected to the input end of the delivery pump (28), and the output end of the delivery pump (28) is connected to the liquid inlet of the three-stage spray of the desulfurization tower (19).

4. The chemical waste gas treatment device according to claim 3, characterized in that, The desulfurization unit also includes an oxidation blower (21), an oxidation tank conveying pump (24), an external oxidation pool (25), and a first conveying pump (26); The output end of the oxidation blower (21) is connected to the oxygen inlet of the circulating oxidation tank (22); The input end of the oxidation tank conveying pump (24) is connected to the output end of the circulating oxidation tank (22), and the output end is connected to the input end of the external oxidation pool (25); the output end of the external oxidation pool (25) is connected to the input end of the first conveying pump (26), and the output end of the first conveying pump (26) is connected to the input end of the circulating oxidation pipe (36).

5. The chemical waste gas treatment device according to claim 1, characterized in that, It also includes an ammonium sulfate slurry transfer pump (29), a crystallization tank (30), and a crystallization transfer pump (32); The input end of the ammonium sulfate slurry pump (29) is connected to the output end of the desulfurization unit, and the output end is connected to the input end of the crystallization tank (30); the output end of the crystallization tank (30) is connected to the input end of the crystallization pump (32), and the output end of the crystallization pump (32) is connected to the input end of the hydrocyclone (33).

6. The chemical waste gas treatment device according to claim 5, characterized in that, It also includes a mixer (31); The mixer (31) is located inside the crystallization tank (30).

7. The chemical waste gas treatment device according to claim 1, characterized in that, It also includes a waste gas condensate collection tank (12), a waste gas condensate transfer pump (13), and a waste gas condensate pipe (39); The input end of the waste gas condensate pipe (39) is connected between the output end of the exhaust fan (11) and the input end of the coal-fired boiler (14), and the output end is connected to the input end of the waste gas condensate collection tank (12); the output end of the waste gas condensate collection tank (12) is connected to the input end of the waste gas condensate transfer pump (13), and the output end of the waste gas condensate transfer pump (13) is connected to the sewage treatment unit.

Images