Process method and complete equipment for removing odor by chemical washing method

Abstract

The invention relates to the technical field of odor treatment, in particular to a process method and complete equipment for removing odor through a chemical washing method.The complete equipment comprises an acid pickling tower, an air inlet pipe, a first air conveying pipe, an alkaline washing tower, a second air conveying pipe and a chimney, the air inlet pipe is arranged on the acid pickling tower, and the top end of the acid pickling tower is communicated with the input end of the first air conveying pipe; the output end of the first gas conveying pipe is communicated with the middle of the alkaline washing tower, the top end of the alkaline washing tower is communicated with the input end of the second gas conveying pipe, the output end of the second gas conveying pipe is communicated with the outer side wall of the chimney, Raschig ring filler is arranged in the acid washing tower, and a mist-liquid isolation layer is arranged at the top end in the alkaline washing tower. The device further comprises an acid supply assembly, an alkali supply assembly and a cooling assembly, the acid supply assembly is used for circularly conveying a concentrated sulfuric acid solution into the acid washing tower, and the alkali supply assembly is used for circularly conveying a sodium hydroxide solution into the alkali washing tower; the continuous treatment capacity is large, equipment such as a heating furnace is not needed during normal-temperature and normal-pressure treatment, and energy consumption is low.

Description

Technical Field

[0001] The invention relates to the technical field of odor treatment, in particular to a process and complete set of equipment for removing odor by chemical washing. Background Art

[0002] In recent years, China has vigorously promoted the development of environmental protection technology. Odor treatment has become one of the focuses of my country's environmental protection work. The waste gas discharged by sewage treatment plants in the petrochemical industry usually contains a large amount of various sulfides such as hydrogen sulfide and sulfur dioxide. Sulfides usually have a pungent odor and are toxic. Direct discharge in the atmosphere will affect the human body, cause imbalance in the body's immune level, affect the function of the central nervous system, and cause symptoms such as dizziness, headache, drowsiness, weakness, and chest tightness. In severe cases, it will damage the digestive system, liver function, and hematopoietic system. In addition, the emission of waste gas will cause environmental pollution, and sulfides are prone to form acid rain. Therefore, the process research and application of waste gas treatment in sewage treatment plants has practical significance for environmental governance.

[0003] Commonly used odor treatment methods include acid washing process, alkaline washing process, activated carbon adsorption process, catalytic combustion process, etc. Among them, the activated carbon adsorption process is not suitable for high-concentration odor and requires regular shutdown to replace activated carbon. The catalytic combustion process is prone to cause secondary pollution of flue gas emissions and other problems. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a process and complete set of equipment for removing odor by a chemical washing method for continuously treating high-concentration odor.

[0005] The present invention discloses a complete set of equipment for removing odor by a chemical washing method, comprising a pickling tower, an air inlet pipe, a No. 1 air transmission pipe, an alkali washing tower, a No. 2 air transmission pipe and a chimney. The pickling tower is provided with an air inlet pipe, the top of the pickling tower is connected with the input end of the No. 1 air transmission pipe, the output end of the No. 1 air transmission pipe is connected with the middle of the alkali washing tower, the top of the alkali washing tower is connected with the input end of the No. 2 air transmission pipe, the output end of the No. 2 air transmission pipe is connected with the outer wall of the chimney, the inside of the pickling tower is provided with a Raschig ring filler, and the top of the alkali washing tower is provided with a mist liquid. The isolation layer also includes an acid supply component, an alkali supply component and a cooling component. The acid supply component is used to circulate concentrated sulfuric acid solution inside the pickling tower, and the alkali supply component is used to circulate sodium hydroxide solution inside the alkali washing tower. During use, after the sewage pool of the sewage treatment plant is sealed, the odor is input into the interior of the pickling tower through the air inlet pipe through the fan, and the acid supply component is started, so that the concentrated sulfuric acid solution enters at the top of the pickling tower and fully contacts with the rising odor with the cooperation of the Raschig ring filler. During the contact process , so that the hydrogen sulfide in the odor reacts to generate sulfur dioxide, and then the concentrated sulfuric acid solution is transported to the acid supply component at the bottom of the acid washing tower, thereby realizing the recycling of the concentrated sulfuric acid solution. Since the reaction of the concentrated sulfuric acid solution with hydrogen sulfide is an exothermic reaction, when the concentrated sulfuric acid solution is transported from the liquid supply component to the inside of the acid washing tower, the cooling component cools the concentrated sulfuric acid solution, and then the odor and sulfur dioxide gas are transported to the inside of the alkali washing tower through the No. 1 gas pipeline, and the alkali supply component is started, so that the sodium hydroxide solution enters the inside of the alkali washing tower and contacts with the odor, and the sodium hydroxide reacts with the sulfur dioxide in the odor to realize the alkali washing operation of the odor. After the acid washing and alkali washing gas passes through the mist liquid isolation layer, it enters the chimney through the No. 2 gas pipeline and is discharged to the outside through the chimney. Compared with the single alkali washing tower, the acid washing and alkali washing series process is adopted to completely oxidize and absorb the main pollutants in the odor, avoiding the situation that the single alkali washing has poor absorption effect on some alkaline substances. The acid washing tower and the alkali washing tower in series have large operation flexibility and large continuous processing capacity. The normal temperature and pressure treatment does not require heating furnaces and other equipment, and the energy consumption is low.

[0006] Preferably, the acid supply component includes a sulfuric acid circulation tank, a sulfuric acid circulation pump, a No. 1 sulfuric acid pipe, a No. 2 sulfuric acid pipe and a No. 3 sulfuric acid pipe, wherein the sulfuric acid circulation pump is installed at the top of the sulfuric acid circulation tank, the input end of the sulfuric acid circulation pump extends to the bottom end of the sulfuric acid circulation tank, the output end of the sulfuric acid circulation pump is provided with a No. 1 sulfuric acid pipe, the output end of the No. 1 sulfuric acid pipe is communicated with the input end of the cooling component, the output end of the cooling component is communicated with the input end of the No. 2 sulfuric acid pipe, the output end of the No. 2 sulfuric acid pipe is communicated with the top of the outer wall of the pickling tower, the bottom of the outer wall of the pickling tower is communicated with the input end of the No. 3 sulfuric acid pipe, and the No. 3 sulfuric acid pipe is connected to the outer wall of the pickling tower. The output end is connected with the outer wall of the sulfuric acid circulation tank; concentrated sulfuric acid solution is injected into the sulfuric acid circulation tank, and the sulfuric acid circulation pump is started, so that the concentrated sulfuric acid solution enters the pickling tower through the No. 1 sulfuric acid pipe, the cooling component and the No. 2 sulfuric acid pipe to perform pickling operation with the hydrogen sulfide solution in the odor, and then the concentrated sulfuric acid solution for reaction returns to the sulfuric acid circulation tank through the No. 3 sulfuric acid pipe. Since the reaction of the concentrated sulfuric acid solution and hydrogen sulfide is an exothermic reaction, the temperature of the concentrated sulfuric acid solution in the sulfuric acid circulation tank increases, and the concentrated sulfuric acid solution with increased temperature is cooled through the No. 1 sulfuric acid pipe and the cooling component to improve the pickling effect.

[0007] Preferably, the alkali supply component includes an alkali liquid tank, an alkali liquid circulation pump, a No. 1 alkali delivery pipe, a No. 2 alkali delivery pipe, a No. 3 alkali delivery pipe, an alkali liquid delivery pump, a No. 1 infusion pipe, a No. 2 infusion pipe, a hydraulic motor and a stirring component, wherein the input end of the alkali liquid circulation pump is provided with a No. 1 alkali delivery pipe, and the No. 1 alkali delivery pipe is connected to the bottom of the outer wall of the alkali washing tower, the output end of the alkali liquid circulation pump is provided with a No. 2 alkali delivery pipe, and the output end of the No. 2 alkali delivery pipe is connected to the input end of the cooling component, the input end of the No. 3 alkali delivery pipe is connected to the output end of the cooling component, and the output end of the No. 3 alkali delivery pipe is connected to the top of the outer wall of the alkali washing tower, the input end of the alkali liquid delivery pump is provided with a No. 1 infusion pipe, and the input end of the No. 1 infusion pipe is connected to the outer wall of the alkali liquid tank, the output end of the alkali liquid delivery pump is provided with a No. 2 infusion pipe, and the The output end of the No. 2 infusion pipe is connected to the top of the outer wall of the alkali washing tower, a hydraulic motor is arranged at the top of the alkali liquid tank, and a stirring component is arranged at the output end of the hydraulic motor; when in use, sodium hydroxide solution is injected into the alkali liquid tank, and the alkali liquid delivery pump is started, so that the sodium hydroxide solution in the alkali liquid tank is delivered to the inside of the alkali washing tower through the No. 1 infusion pipe and the No. 2 infusion pipe, and the alkali liquid circulation pump is started, so that the sodium hydroxide solution in the alkali washing tower is delivered to the top of the alkali washing tower through the No. 1 alkali delivery pipe and the No. 2 alkali delivery pipe, so that the sodium hydroxide solution washes the sulfur dioxide rising in the alkali washing tower, and because the reaction of the sodium hydroxide solution and the sulfur dioxide gas is an exothermic reaction, the No. 3 alkali delivery pipe cools the sodium hydroxide solution through the cooling component when delivering it, thereby improving the alkali washing efficiency.

[0008] Preferably, the cooling assembly includes a circulating water pool, a No. 1 heat exchanger, a No. 2 heat exchanger, a circulating water pump, a No. 1 water pipe, a No. 2 water pipe, a No. 3 water pipe, a No. 4 water pipe, a domestic water equipment, a No. 5 water pipe, a No. 1 three-way pipe, a heating pipe, a heating valve, a No. 1 shunt pipe, a No. 2 shunt pipe, a No. 2 three-way pipe, a No. 6 water pipe and a shunt valve, the No. 1 sulfuric acid pipe output end is connected to the No. 2 heat exchanger pipe input end, the No. 2 heat exchanger pipe output end is connected to the No. 2 sulfuric acid pipe input end, the No. 2 alkali pipe output end is connected to the circulating water pump pipe input end, the circulating water pump pipe output end is connected to the No. 3 alkali pipe input end, a No. 1 water pipe is arranged between the circulating water pump and the circulating water pool, and the circulating water pump output end is arranged No. 2 water pipe, the output end of the No. 2 water pipe is connected to the shell side input end of the No. 2 heat exchanger, the shell side output end of the No. 2 heat exchanger is connected to the input end of the No. 3 water pipe, the output end of the No. 3 water pipe is connected to the shell side input end of the No. 2 heat exchanger, the shell side output end of the No. 2 heat exchanger is connected to the input end of the No. 4 water pipe, the output end of the No. 4 water pipe is connected to the input end of the domestic water equipment, the output end of the domestic water equipment is provided with a No. 5 water pipe, the output end of the No. 5 water pipe is connected to the input end of the No. 1 three-way pipe, the first group of output ends of the No. 1 three-way pipe is connected to the input end of the heating pipe, the heating pipe runs through the alkali liquid tank, the heating pipe is provided with a heating valve, and the second group of output ends of the No. 1 three-way pipe is provided with a No. 1 diversion pipe , a diverter valve is arranged on the No. 1 diverter pipe, the output end of the No. 1 diverter pipe is connected with the input end of the hydraulic motor, the output end of the hydraulic motor is arranged with a No. 2 diverter pipe, the output end of the No. 2 diverter pipe is connected with the first group of input ends of the No. 2 tee pipe, the output end of the heating pipe is connected with the second group of input ends of the No. 2 tee pipe, the output end of the No. 2 tee pipe is arranged with a No. 6 water pipe, and the No. 6 water pipe is connected with the rear end of the circulating water pool; when in use, the No. 2 heat exchanger is started, so that the water inside the circulating water pool enters the No. 1 heat exchanger through the No. 1 water pipe and the No. 2 water pipe to cool the concentrated sulfuric acid solution, and the cooling water forms hot water, and then the hot water in the No. 1 heat exchanger enters the No. 2 heat exchanger through the No. 3 water pipe to cool the sodium hydroxide solution It is cooled and then the cooling water that absorbs the heat of the concentrated sulfuric acid solution and the heat of the sodium hydroxide solution enters the domestic water equipment through the No. 4 water pipe to exchange the heat for secondary utilization, and the hot water becomes warm water. Then the warm water is divided into two paths with the cooperation of the No. 1 three-way pipe. The first path of warm water after cooling enters the heating pipe to heat the alkali solution inside the alkali solution tank, and the second path of warm water enters the No. 1 diversion pipe and enters the hydraulic motor, so that the hydraulic motor drives the stirring assembly to stir the sodium hydroxide solution inside the alkali solution tank, so that the cooled warm water inside the heating pipe heats the inside of the alkali solution tank to prevent the sodium hydroxide solution inside the alkali solution tank from crystallizing under low temperature environment. Then the two paths of warm water return to the circulating water pool through the No. 6 water pipe with the cooperation of the No. 2 three-way pipe.

[0009] Preferably, the stirring assembly includes a rotating shaft, fan-shaped stirring blades and plate-shaped stirring blades. The output end of the hydraulic motor is provided with a rotating shaft, the bottom end of the rotating shaft extends to the inside of the alkali liquid tank, the multiple groups of fan-shaped stirring blades are installed on the rotating shaft inside the alkali liquid tank, and the multiple groups of plate-shaped stirring blades are installed on the rotating shaft inside the alkali liquid tank; warm water enters the hydraulic motor through the No. 1 diversion pipe and is discharged through the No. 2 diversion pipe. The hydraulic motor drives the rotating shaft to rotate under the action of the flowing warm water, and further the multiple groups of fan-shaped stirring blades and the multiple groups of plate-shaped stirring blades cooperate with each other to stir the sodium hydroxide solution inside the alkali liquid tank, so that the warm water inside the heating tube evenly heats the sodium hydroxide solution to avoid crystallization of the sodium hydroxide solution in a low temperature environment.

[0010] Preferably, it also includes a liquid level meter, and the alkali liquid tank is provided with a liquid level meter; the liquid level meter displays the amount of sodium hydroxide in the alkali liquid tank so that it can be added in time, thereby improving convenience.

[0011] Preferably, it also includes a No. 1 external insulation layer, and the outer side wall of the sulfuric acid circulation tank is covered with the No. 1 external insulation layer; the No. 1 external insulation layer insulates the concentrated sulfuric acid solution inside the sulfuric acid circulation tank.

[0012] Preferably, it also includes a No. 2 external insulation layer, and the outer side wall of the alkali liquid tank is provided with the No. 2 external insulation layer; the No. 2 external insulation layer insulates the sodium hydroxide solution inside the alkali liquid tank to prevent the sodium hydroxide solution from crystallizing in a low temperature environment and affecting alkali washing.

[0013] Preferably, the fan-shaped stirring blades and the plate-shaped stirring blades are both made of stainless steel.

[0014] The present invention discloses a process and complete equipment for removing odor by chemical washing, comprising the following steps:

[0015] Step 1: The odor in the sealed pool and water tank of the sewage treatment plant is transported to the pickling tower through a fan;

[0016] Step 2: The odor enters the pickling tower and is pickled with a concentrated sulfuric acid solution to convert the hydrogen sulfide in the odor into sulfur dioxide. The odor after pickling is transported to the alkali washing tower;

[0017] Step 3: The acid-washed odor enters the alkali washing tower and is alkali-washed by a hydrogenation tower solution, thereby eliminating sulfur dioxide in the odor;

[0018] Step 4: After acid washing and alkali washing, the hydrogen sulfide content in the odor is reduced to less than 0.03 mg / m 3 Then it is discharged through the chimney.

[0019] Compared with the prior art, the invention has the following beneficial effects: during use, after the sewage pool of the sewage treatment plant is sealed, the odor is input into the interior of the pickling tower through the air inlet pipe by a fan, and the acid supply component is started, so that the concentrated sulfuric acid solution enters at the top of the pickling tower and is fully in contact with the rising odor with the cooperation of the Raschig ring filler. During the contact process, the hydrogen sulfide in the odor is reacted to generate sulfur dioxide, and then the concentrated sulfuric acid solution is transported to the acid supply component at the bottom of the pickling tower, thereby realizing the recycling of the concentrated sulfuric acid solution. Since the reaction of the concentrated sulfuric acid solution with hydrogen sulfide is an exothermic reaction, when the concentrated sulfuric acid solution is transported from the liquid supply component to the interior of the pickling tower, the cooling component cools the concentrated sulfuric acid solution, and then Odor and sulfur dioxide gas are transported to the inside of the alkali washing tower through the No. 1 gas pipeline, and the alkali supply component is started to allow the sodium hydroxide solution to enter the alkali washing tower and contact with the odor. The sodium hydroxide reacts with the sulfur dioxide in the odor to achieve alkali washing operation on the odor. The gas after acid washing and alkali washing passes through the mist liquid isolation layer and enters the chimney through the No. 2 gas pipeline and is discharged to the outside through the chimney. Compared with a single alkali washing tower, an acid washing and alkali washing series process is adopted to thoroughly oxidize and absorb the main pollutants in the odor, avoiding the situation where a single alkali washing has poor absorption effect on some alkaline substances. The acid washing tower and the alkali washing tower in series have great operational flexibility and a large continuous processing capacity. The treatment at normal temperature and pressure does not require equipment such as a heating furnace, and the energy consumption is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a first isometric structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0022] Figure 3 It is an enlarged structural schematic diagram of structures such as an acid washing tower and an alkali washing tower;

[0023] Figure 4 It is an enlarged structural diagram of the structures such as the circulating water pool and domestic water equipment;

[0024] Figure 5 It is a first enlarged structural diagram of the structure of the water motor and the No. 1 tee pipe;

[0025] Figure 6 yes Figure 5 A partial enlarged structural diagram of the middle part;

[0026] Figure 7 It is a second enlarged structural diagram of the water motor and the No. 1 tee pipe and other structures;

[0027] Figure 8 It is a schematic diagram of the cross-sectional structure of the alkali liquid tank and other structures;

[0028] Fig. 9It is an enlarged schematic diagram of the structure of the alkali liquid tank and the hydraulic motor;

[0029] Fig.10 It is an enlarged structural schematic diagram of fan-shaped stirring blades and plate-shaped stirring blades;

[0030] Fig.11 is a second isometric structural schematic diagram of the present invention;

[0031] Fig.12 is a third axonometric structural schematic diagram of the present invention;

[0032] Fig.13 It is a flow chart of the method of the present invention.

[0033] Markings in the attached drawings: 101, acid washing tower; 102, air inlet pipe; 103, No. 1 air transmission pipe; 104, alkali washing tower; 105, No. 2 air transmission pipe; 106, chimney; 201, sulfuric acid circulation tank; 202, sulfuric acid circulation pump; 203, No. 1 sulfuric acid pipe; 204, No. 2 sulfuric acid pipe; 205, No. 3 sulfuric acid pipe; 206, No. 1 outer insulation layer; 301, alkali liquid tank; 302, alkali liquid circulation pump; 303, No. 1 alkali transmission pipe; 304, No. 2 alkali transmission pipe; 305, No. 3 alkali transmission pipe; 306, alkali liquid delivery pump; 307, No. 1 infusion pipe; 309, No. 2 infusion pipe; 310, hydraulic motor; 311, liquid level 1. The number of the following items: 1. The number of the following items: 2. The number of the following items: 3. The number of the following items: 4. The number of the following items: 5. The number of the following items: 6. The number of the following items: 7. The number of the following items: 8. The number of the following items: 9. The number of the following items: 10. The number of the following items: 11. The number of the following items: 12. The number of the following items: 13. The number of the following items: 14. The number of the following items: 15. The number of the following items: 16. The number of the following items: 17. The number of the following items: 18. The number of the following items: 19. The number of the following items: 20. The number of the following items: 21. The number of the following items: 22. The number of the following items: 23. The number of the following items: 24. The number of the following items: 25. The number of the following items: 26. The number of the following items: 27. The number of the following items: 28. The number of the following items: 29. The number of the following items: 30. The number of the following items: 31. The number of the following items: 31. The number of the following items: 32. The number of the following items: 33. The number of the following items: 34. The number of the following items: 35. The number of the following items: 36. The number of the following items: 37. The number of the following items: 38. The number of the following items: 39. The number of the following items: 40. The number of the following items: 41. The number of the following items: 42. The number of the following items: 43. The number of the following items: 44. The number of the following items: 45. The number of the following items: 46. DETAILED DESCRIPTION

[0034] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0035] Example 1

[0036] like Figures 1 to 12As shown, a complete set of equipment for removing odor by a chemical washing method of the present invention comprises a pickling tower 101, an air inlet pipe 102, a No. 1 air pipeline 103, an alkali washing tower 104, a No. 2 air pipeline 105 and a chimney 106, wherein the pickling tower 101 is provided with an air inlet pipe 102, the top of the pickling tower 101 is connected to the input end of the No. 1 air pipeline 103, the output end of the No. 1 air pipeline 103 is connected to the middle of the alkali washing tower 104, the top of the alkali washing tower 104 is connected to the input end of the No. 2 air pipeline 105, the output end of the No. 2 air pipeline 105 is connected to the outer wall of the chimney 106, a Raschig ring filler is provided inside the pickling tower 101, a mist liquid isolation layer is provided at the top of the alkali washing tower 104, and further comprises an acid supply component, an alkali supply component and a cooling component, the acid supply component is used for circulating concentrated sulfuric acid solution inside the pickling tower 101, and the alkali supply component is used for circulating sodium hydroxide solution inside the alkali washing tower 104;

[0037] The acid supply component includes a sulfuric acid circulation tank 201, a sulfuric acid circulation pump 202, a No. 1 sulfuric acid pipe 203, a No. 2 sulfuric acid pipe 204 and a No. 3 sulfuric acid pipe 205, wherein the sulfuric acid circulation pump 202 is installed at the top of the sulfuric acid circulation tank 201, and the input end of the sulfuric acid circulation pump 202 extends to the bottom end of the sulfuric acid circulation tank 201. The output end of the sulfuric acid circulation pump 202 is provided with a No. 1 sulfuric acid pipe 203, and the output end of the No. 1 sulfuric acid pipe 203 is communicated with the input end of the cooling component, and the output end of the cooling component is communicated with the input end of the No. 2 sulfuric acid pipe 204, and the output end of the No. 2 sulfuric acid pipe 204 is communicated with the top of the outer wall of the pickling tower 101, and the bottom of the outer wall of the pickling tower 101 is communicated with the input end of the No. 3 sulfuric acid pipe 205, and the output end of the No. 3 sulfuric acid pipe 205 is communicated with the outer wall of the sulfuric acid circulation tank 201;

[0038] The alkali supply component includes an alkali liquid tank 301, an alkali liquid circulation pump 302, a No. 1 alkali delivery pipe 303, a No. 2 alkali delivery pipe 304, a No. 3 alkali delivery pipe 305, an alkali liquid delivery pump 306, a No. 1 infusion pipe 307, a No. 2 infusion pipe 309, a hydraulic motor 310 and a stirring component. The input end of the alkali liquid circulation pump 302 is provided with a No. 1 alkali delivery pipe 303, and the No. 1 alkali delivery pipe 303 is connected to the bottom of the outer wall of the alkali washing tower 104. The output end of the alkali liquid circulation pump 302 is provided with a No. 2 alkali delivery pipe 304, and the output end of the No. 2 alkali delivery pipe 304 is connected to the input end of the cooling component. The input end of the pipe 305 is connected to the output end of the cooling component, the output end of the No. 3 alkali delivery pipe 305 is connected to the top of the outer wall of the alkali washing tower 104, the input end of the alkali liquid delivery pump 306 is provided with a No. 1 infusion pipe 307, the input end of the No. 1 infusion pipe 307 is connected to the outer wall of the alkali liquid tank 301, the output end of the alkali liquid delivery pump 306 is provided with a No. 2 infusion pipe 309, the output end of the No. 2 infusion pipe 309 is connected to the top of the outer wall of the alkali washing tower 104, the top of the alkali liquid tank 301 is provided with a hydraulic motor 310, and the output end of the hydraulic motor 310 is provided with a stirring component;

[0039] The cooling assembly includes a circulating water pool 401, a No. 1 heat exchanger 402, a No. 2 heat exchanger 403, a circulating water pump 404, a No. 1 water pipe 405, a No. 2 water pipe 406, a No. 3 water pipe 407, a No. 4 water pipe 408, a domestic water equipment 409, a No. 5 water pipe 410, a No. 1 three-way pipe 411, a heating pipe 412, a heating valve 413, a No. 1 diversion pipe 414, a No. 2 diversion pipe 415, a No. 2 three-way pipe 416, a No. 6 water pipe 417 and a diversion valve 418. The output end of the No. 1 sulfuric acid pipe 203 is connected to the input end of the No. 2 heat exchanger 403 pipe, and the output end of the No. 2 heat exchanger 403 pipe is connected to the No. 6 sulfuric acid pipe 417. The input end of the No. 2 sulfuric acid pipe 204 is connected, the output end of the No. 2 alkali delivery pipe 304 is connected to the input end of the circulating water pump 404 pipe side, the output end of the circulating water pump 404 pipe side is connected to the input end of the No. 3 alkali delivery pipe 305, a No. 1 water delivery pipe 405 is arranged between the circulating water pump 404 and the circulating water pool 401, a No. 2 water delivery pipe 406 is arranged at the output end of the circulating water pump 404, the output end of the No. 2 water delivery pipe 406 is connected to the shell side input end of the No. 2 heat exchanger 403, the shell side output end of the No. 2 heat exchanger 403 is connected to the input end of the No. 3 water delivery pipe 407, the output end of the No. 3 water delivery pipe 407 is connected to the No. 2 heat exchanger 403 shell side input end, the No. 2 heat exchanger 403 shell side output end is connected to the No. 3 water delivery pipe 407 input end, the No. 3 water delivery pipe 407 output end is connected to the No. 406 heat exchanger 403 shell side input end, the No. 406 heat exchanger 403 shell side output end is connected to the No. 407 heat exchanger 403 shell side input end, the No. 407 ... The shell side input end of the second heat exchanger 403 is connected, the shell side output end of the second heat exchanger 403 is connected to the input end of the fourth water pipe 408, the output end of the fourth water pipe 408 is connected to the input end of the domestic water equipment 409, the output end of the domestic water equipment 409 is provided with a fifth water pipe 410, the output end of the fifth water pipe 410 is connected to the input end of the first three-way pipe 411, the first group of output ends of the first three-way pipe 411 is connected to the input end of the heating pipe 412, the heating pipe 412 runs through the alkali liquid tank 301, the heating pipe 412 is provided with a heating valve 413, the first three-way pipe 41 1 is provided with a No. 1 shunt pipe 414 at the second output end, and a shunt valve 418 is provided on the No. 1 shunt pipe 414. The output end of the No. 1 shunt pipe 414 is connected to the input end of the hydraulic motor 310. The output end of the hydraulic motor 310 is provided with a No. 2 shunt pipe 415. The output end of the No. 2 shunt pipe 415 is connected to the first input end of the No. 2 tee pipe 416. The output end of the heating pipe 412 is connected to the second input end of the No. 2 tee pipe 416. The output end of the No. 2 tee pipe 416 is provided with a No. 6 water delivery pipe 417. The No. 6 water delivery pipe 417 is connected to the rear end of the circulating water pool 401.

[0040] The stirring assembly includes a rotating shaft 501, fan-shaped stirring blades 502 and plate-shaped stirring blades 503. The output end of the hydraulic motor 310 is provided with a rotating shaft 501, and the bottom end of the rotating shaft 501 extends to the inside of the alkali liquid tank 301. The multiple groups of fan-shaped stirring blades 502 are installed on the rotating shaft 501 inside the alkali liquid tank 301, and the multiple groups of plate-shaped stirring blades 503 are installed on the rotating shaft 501 inside the alkali liquid tank 301.

[0041] In this embodiment, concentrated sulfuric acid solution is injected into the sulfuric acid circulation tank 201, and the sulfuric acid circulation pump 202 is started, so that the concentrated sulfuric acid solution enters the pickling tower 101 through the No. 1 sulfuric acid pipe 203, the No. 1 heat exchanger 402 and the No. 2 sulfuric acid pipe 204 to perform pickling operation with the hydrogen sulfide solution in the odor, and the No. 1 heat exchanger 402 cools the concentrated sulfuric acid solution, and the alkali liquid tank 301 is injected with sodium hydroxide solution, and the alkali liquid delivery pump 306 is started, so that the sodium hydroxide solution in the alkali liquid tank 301 is delivered to the alkali washing tower 104 through the No. 1 infusion pipe 307 and the No. 2 infusion pipe 309, and the alkali liquid circulation pump 302 is started, so that the sodium hydroxide solution in the alkali washing tower 104 is delivered to the top of the alkali washing tower 104 through the No. 1 alkali delivery pipe 303 and the No. 2 alkali delivery pipe 304, so that the sodium hydroxide solution washes the sulfur dioxide rising in the alkali washing tower 104, and the cooling water cools the sodium hydroxide solution through the No. 2 heat exchanger 403. After absorbing heat, the cooling water becomes hot water, and the hot water enters the domestic water equipment 409 through the No. 4 water pipe 408 to exchange heat for secondary utilization, and the hot water becomes warm water. Then the warm water is divided into two paths with the cooperation of the No. 1 three-way pipe 411. The first path of cooled warm water enters the heating pipe 412 to heat the alkali solution inside the alkali liquid tank 301, and the second path of warm water enters the No. 1 diversion pipe 414 and enters the hydraulic motor 310, so that the hydraulic motor 310 drives the stirring assembly to stir the sodium hydroxide solution inside the alkali liquid tank 301, so that the cooled warm water inside the heating pipe 412 heats the inside of the alkali liquid tank 301 to prevent the sodium hydroxide solution inside the alkali liquid tank 301 from crystallizing under the low temperature environment. Then, the two paths of warm water return to the circulating water pool 401 through the No. 6 water pipe 417 with the cooperation of the No. 2 three-way pipe 416, and the odor inside the alkali washing tower 104 enters the chimney 106 through the No. 2 gas pipe 105 for external discharge.

[0042] Example 2

[0043] like Fig.13 As shown, a process for removing odor by a chemical washing method of the present invention comprises the following steps:

[0044] Step 1: The odor in the sealed pool and water tank of the sewage treatment plant is transported to the pickling tower through a fan;

[0045] Step 2: The odor enters the pickling tower and is pickled with a concentrated sulfuric acid solution to convert the hydrogen sulfide in the odor into sulfur dioxide. The odor after pickling is transported to the alkali washing tower;

[0046] Step 3: The acid-washed odor enters the alkali washing tower and is alkali-washed by a hydrogenation tower solution, thereby eliminating sulfur dioxide in the odor;

[0047] Step 4: After acid washing and alkali washing, the hydrogen sulfide content in the odor is reduced to less than 0.03 mg / m 3 Then it is discharged through the chimney.

[0048] The main functions achieved by the present invention are: adopting the acid washing and alkali washing series process to thoroughly oxidize and absorb the main pollutants in the odor, avoiding the situation where a single alkali washing has a poor absorption effect on some alkaline substances. The acid washing tower and the alkali washing tower are connected in series with each other, and the operation flexibility is large, the continuous processing capacity is large, and the treatment at normal temperature and pressure does not require equipment such as a heating furnace, and the energy consumption is low.

[0049] The installation, connection or setting methods of the process method and complete set of equipment for removing odor by a chemical washing method of the present invention are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects; the acid washing tower 101 and the alkali washing tower 104 of the process method and complete set of equipment for removing odor by a chemical washing method of the present invention are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A complete set of equipment for removing odor by chemical washing method, comprising a pickling tower (101), an air inlet pipe (102), a No. 1 air pipeline (103), an alkali washing tower (104), a No. 2 air pipeline (105) and a chimney (106), wherein the pickling tower (101) is provided with an air inlet pipe (102), the top of the pickling tower (101) is connected to the input end of the No. 1 air pipeline (103), the output end of the No. 1 air pipeline (103) is connected to the middle of the alkali washing tower (104), the top of the alkali washing tower (104) is connected to the input end of the No. 2 air pipeline (105), the output end of the No. 2 air pipeline (105) is connected to the outer wall of the chimney (106), the inside of the pickling tower (101) is provided with a Raschig ring filler, and the top of the inside of the alkali washing tower (104) is provided with a mist liquid isolation layer, characterized in that: It also includes an acid supply component, an alkali supply component and a cooling component. The acid supply component is used to circulate concentrated sulfuric acid solution inside the acid washing tower (101), and the alkali supply component is used to circulate sodium hydroxide solution inside the alkali washing tower (104).

2. A complete set of equipment for removing odor by chemical washing method as claimed in claim 1, characterized in that: The acid supply component comprises a sulfuric acid circulation tank (201), a sulfuric acid circulation pump (202), a No. 1 sulfuric acid pipe (203), a No. 2 sulfuric acid pipe (204) and a No. 3 sulfuric acid pipe (205), wherein the sulfuric acid circulation pump (202) is installed at the top of the sulfuric acid circulation tank (201), the input end of the sulfuric acid circulation pump (202) extends to the bottom end inside the sulfuric acid circulation tank (201), the output end of the sulfuric acid circulation pump (202) is provided with the No. 1 sulfuric acid pipe (203), the output end of the No. 1 sulfuric acid pipe (203) is communicated with the input end of the cooling component, the output end of the cooling component is communicated with the input end of the No. 2 sulfuric acid pipe (204), the output end of the No. 2 sulfuric acid pipe (204) is communicated with the top of the outer wall of the pickling tower (101), the bottom of the outer wall of the pickling tower (101) is communicated with the input end of the No. 3 sulfuric acid pipe (205), and the output end of the No. 3 sulfuric acid pipe (205) is communicated with the outer wall of the sulfuric acid circulation tank (201).

3. A complete set of equipment for removing odor by chemical washing method as claimed in claim 2, characterized in that: The alkali supply component comprises an alkali liquid tank (301), an alkali liquid circulation pump (302), a No. 1 alkali delivery pipe (303), a No. 2 alkali delivery pipe (304), a No. 3 alkali delivery pipe (305), an alkali liquid delivery pump (306), a No. 1 liquid delivery pipe (307), a No. 2 liquid delivery pipe (309), a hydraulic motor (310) and a stirring component. The input end of the alkali liquid circulation pump (302) is provided with the No. 1 alkali delivery pipe (303), the No. 1 alkali delivery pipe (303) is connected to the bottom of the outer wall of the alkali washing tower (104), the output end of the alkali liquid circulation pump (302) is provided with the No. 2 alkali delivery pipe (304), the output end of the No. 2 alkali delivery pipe (304) is connected to the input end of the cooling component, and the No. 3 alkali delivery pipe (310) is connected to the input end of the cooling component. The input end of the alkali delivery pipe (305) is connected to the output end of the cooling component, the output end of the No. 3 alkali delivery pipe (305) is connected to the top of the outer wall of the alkali washing tower (104), the input end of the alkali liquid delivery pump (306) is provided with a No. 1 infusion pipe (307), the input end of the No. 1 infusion pipe (307) is connected to the outer wall of the alkali liquid tank (301), the output end of the alkali liquid delivery pump (306) is provided with a No. 2 infusion pipe (309), the output end of the No. 2 infusion pipe (309) is connected to the top of the outer wall of the alkali washing tower (104), the top of the alkali liquid tank (301) is provided with a hydraulic motor (310), and the output end of the hydraulic motor (310) is provided with a stirring component.

4. A complete set of equipment for removing odor by chemical washing method as claimed in claim 3, characterized in that: The cooling assembly comprises a circulating water pool (401), a No. 1 heat exchanger (402), a No. 2 heat exchanger (403), a circulating water pump (404), a No. 1 water pipe (405), a No. 2 water pipe (406), a No. 3 water pipe (407), a No. 4 water pipe (408), a domestic water equipment (409), a No. 5 water pipe (410), a No. 1 three-way pipe (411), a heating pipe (412), a heating valve (413), a No. 1 diversion pipe (414), a No. 2 diversion pipe (415), a No. 2 three-way pipe (416), a No. 6 water pipe (417) and a diversion valve (418). The output end of the No. 1 sulfuric acid pipe (203) is connected to the input end of the pipe path of the No. 2 heat exchanger (403). The No. 2 heat exchanger (403) The output end of the pipe side is connected to the input end of the No. 2 sulfuric acid pipe (204), the output end of the No. 2 alkali delivery pipe (304) is connected to the input end of the pipe side of the circulating water pump (404), the output end of the pipe side of the circulating water pump (404) is connected to the input end of the No. 3 alkali delivery pipe (305), a No. 1 water delivery pipe (405) is arranged between the circulating water pump (404) and the circulating water pool (401), a No. 2 water delivery pipe (406) is arranged at the output end of the circulating water pump (404), the output end of the No. 2 water delivery pipe (406) is connected to the shell side input end of the No. 2 heat exchanger (403), the shell side output end of the No. 2 heat exchanger (403) is connected to the input end of the No. 3 water delivery pipe (407), and the No. 3 water delivery pipe (407) is connected to the No. 4 sulfuric acid pipe (204). The output end is connected to the shell side input end of the second heat exchanger (403), the shell side output end of the second heat exchanger (403) is connected to the input end of the fourth water pipe (408), the output end of the fourth water pipe (408) is connected to the input end of the domestic water equipment (409), the output end of the domestic water equipment (409) is provided with a fifth water pipe (410), the output end of the fifth water pipe (410) is connected to the input end of the first three-way pipe (411), the first group of output ends of the first three-way pipe (411) is connected to the input end of the heating pipe (412), the heating pipe (412) runs through the alkali liquid tank (301), the heating pipe (412) is provided with a heating valve (413), the first three-way pipe (411) A first diversion pipe (414) is provided at the second output end of the water pump (411), and a diversion valve (418) is provided on the first diversion pipe (414). The output end of the first diversion pipe (414) is connected to the input end of the water motor (310). A second diversion pipe (415) is provided at the output end of the water motor (310). The output end of the second diversion pipe (415) is connected to the first input end of the second three-way pipe (416). The output end of the heating pipe (412) is connected to the second input end of the second three-way pipe (416). A sixth water delivery pipe (417) is provided at the output end of the second three-way pipe (416), and the sixth water delivery pipe (417) is connected to the rear end of the circulating water pool (401).

5. A complete set of equipment for removing odor by chemical washing method as claimed in claim 3, characterized in that: The stirring assembly comprises a rotating shaft (501), a fan-shaped stirring blade (502) and a plate-shaped stirring blade (503); the output end of the water-driven motor (310) is provided with a rotating shaft (501); the bottom end of the rotating shaft (501) extends into the inside of the alkali liquid tank (301); the multiple groups of fan-shaped stirring blades (502) are mounted on the rotating shaft (501) inside the alkali liquid tank (301); and the multiple groups of plate-shaped stirring blades (503) are mounted on the rotating shaft (501) inside the alkali liquid tank (301).

6. A complete set of equipment for removing odor by chemical washing method as claimed in claim 3, characterized in that: It also includes a liquid level meter (311), and the alkali liquid tank (301) is provided with the liquid level meter (311).

7. A complete set of equipment for removing odor by chemical washing method as claimed in claim 2, characterized in that: It also includes a first outer thermal insulation layer (206), and the outer side wall of the sulfuric acid circulation tank (201) is covered with the first outer thermal insulation layer (206).

8. A complete set of equipment for removing odor by chemical washing method as claimed in claim 3, characterized in that: It also includes a second outer thermal insulation layer (312), and the outer side wall of the alkali liquid tank (301) is sleeved with the second outer thermal insulation layer (312).

9. A complete set of equipment for removing odor by chemical washing as claimed in claim 5, characterized in that: The fan-shaped stirring blade (502) and the plate-shaped stirring blade (503) are both made of stainless steel.

10. A process for removing odor by chemical washing, characterized in that: The following steps are involved: Step 1: The odor in the sealed pool and water tank of the sewage treatment plant is transported to the pickling tower through a fan; Step 2: The odor enters the pickling tower and is pickled with a concentrated sulfuric acid solution to convert the hydrogen sulfide in the odor into sulfur dioxide. The odor after pickling is transported to the alkali washing tower; Step 3: The acid-washed odor enters the alkali washing tower and is alkali-washed by a hydrogenation tower solution, thereby eliminating sulfur dioxide in the odor; Step 4: After acid washing and alkali washing, the hydrogen sulfide content in the odor is reduced to less than 0.03 mg / m 3 Then it is discharged through the chimney.

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