Wet deacidification system for incineration flue gas
By designing a wet deacid system for incineration flue gas, the liquid pipeline system is used to realize the reuse of alkaline washing liquid, which solves the problem of spray liquid in the prior art that cannot be recycled, saves water resources and reduces operating costs.
Patent Information
- Application Number
- CN202421184666.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-05-28
AI Technical Summary
In the existing scrubber system, spray fluid cannot be recycled after a spray task, resulting in waste of water resources and increased operating costs, and burdens the environment.
A wet deacid system for incineration flue gas is designed, including the scrubber body, the flue gas pipeline system and the liquid pipeline system. The reuse of alkaline wash liquid is achieved through the spray reflow branch pipe and the main pipe of the return flow of alkaline wash liquid, and the quality of alkaline wash liquid is detected and controlled through the concentration sensor.
The reuse of alkaline washing liquid is realized, water resources are saved, operating costs are reduced, and the quality of flue gas purification is ensured.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas purification equipment, in particular to a wet deacidification system for incineration flue gas. Background Art
[0002] In the current environmental protection and industrial treatment fields, scrubbers are important equipment for treating waste gas. Their working principle mainly relies on the spray liquid to absorb, dissolve or neutralize harmful substances in the waste gas to achieve the purpose of purifying the waste gas. However, in the existing scrubber system, the spray liquid is discharged through the sewage pipe after completing a spraying task. It is not recycled. New spray liquid needs to be continuously added to meet the needs of continuous operation of the scrubber. This not only causes a huge waste of water resources, but also increases operating costs, and also creates an unnecessary burden on the environment. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a wet deacidification system for incineration flue gas to overcome the deficiencies in the above-mentioned prior art.
[0004] The utility model solves the above technical problems with the following technical solutions: A system for wet deacidification of incineration flue gas, comprising a scrubbing tower body and a flue gas pipeline system and a liquid pipeline system connected to the scrubbing tower body; the flue gas pipeline system comprises a smoke inlet pipeline and a smoke exhaust pipeline respectively connected to a smoke inlet and a smoke outlet of the scrubbing tower body;
[0005] The liquid pipeline system includes a sewage main pipeline, a return main pipeline, a spray liquid return branch pipeline, a first spray liquid branch pipeline, a second spray liquid branch pipeline, a sampling branch pipeline and a sewage branch pipeline;
[0006] One end of the sampling branch pipe and the sewage branch pipe is connected to the sewage outlet and the sampling reflux port of the washing tower body respectively, and the other end is connected to the sewage main pipe through a three-way valve respectively. A concentration sensor is arranged on the sampling branch pipe;
[0007] One end of the reflux main pipeline is connected to the spray liquid outlet of the washing tower body, and the other end is connected to one end of the first spray liquid branch pipeline and the second spray liquid branch pipeline respectively. The other ends of the first spray liquid branch pipeline and the second spray liquid branch pipeline are connected to the first spray liquid port and the second spray liquid port of the washing tower body respectively. A water pump is arranged on the reflux main pipeline.
[0008] The beneficial effects of the utility model are as follows: the alkaline washing liquid in the alkaline washing layer at the bottom of the washing tower body passes through the spray liquid reflux branch pipe and the reflux main pipe, and then is pumped into the first spray liquid branch pipe and the second spray liquid branch pipe by a water pump, thereby realizing the reuse of the alkaline washing liquid and greatly saving water resources; the concentration sensor detects the alkaline washing liquid sample flowing out of the sampling reflux port, and when it does not meet the requirements, the sewage main pipe is opened to discharge the alkaline washing liquid in the alkaline washing layer, thereby ensuring the quality of alkaline washing of the flue gas.
[0009] On the basis of the above technical solution, the present invention can also be improved as follows.
[0010] Furthermore, the liquid pipeline system also includes an overflow branch pipeline, one end of which is connected to the overflow port of the washing tower body, and the other end of which is connected to the sewage main pipeline.
[0011] Furthermore, the other end of the overflow branch pipe is connected to the sampling branch pipe through a three-way valve and is located between the concentration sensor and the sampling reflux port of the washing tower body.
[0012] Furthermore, the liquid pipeline system also includes a sampling discharge branch pipeline and a sampling reflux branch pipeline; one end of the sampling discharge branch pipeline is respectively connected to the sampling branch pipeline and the sampling reflux branch pipeline through a three-way valve, and the other end is respectively connected to the sewage branch pipeline and the sewage main pipeline, and the other end of the sampling reflux branch pipeline is respectively connected to the spray liquid reflux branch pipeline and the reflux main pipeline through a three-way valve.
[0013] Furthermore, the liquid pipeline system also includes a clean water main pipeline, which is connected to a backwash branch pipeline and a water replenishment branch pipeline through a three-way valve. The backwash branch pipeline is connected to the backwash port of the washing tower body, and the water replenishment branch pipeline is connected to the water replenishment port of the washing tower body.
[0014] Furthermore, a Y-type filter is provided on the reflux main pipeline at the water inlet end of the water pump.
[0015] Furthermore, a check valve is provided on the reflux main pipeline at the water outlet of the water pump.
[0016] Furthermore, both the smoke inlet duct and the smoke exhaust duct are insulated pipelines. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model.
[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0019] 1. Scrubber body; 101. Smoke inlet; 102. Smoke outlet; 103. Sewage outlet; 104. Sampling return outlet; 105. Spray liquid outlet; 106. Overflow outlet; 107. Backwash outlet; 108. Water replenishment outlet; 109. First spray liquid outlet; 110. Second spray liquid outlet; 2. Smoke pipe system; 201. Smoke inlet pipe; 202. Smoke exhaust pipe; 3. Liquid pipe system; 301. Sewage main pipe; 302. Return main pipe; 303. 03, spray liquid reflux branch pipe; 304, first spray liquid branch pipe; 305, second spray liquid branch pipe; 306, sampling branch pipe; 307, sewage branch pipe; 308, overflow branch pipe; 309, sampling discharge branch pipe; 310, sampling reflux branch pipe; 311, clean water main pipe; 312, backwash branch pipe; 313, water replenishment branch pipe; 4, three-way valve; 5, concentration sensor; 6, water pump; 7, Y-type filter; 8, check valve. DETAILED DESCRIPTION
[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0021] like Figure 1 As shown, in Example 1, a system for wet deacidification of incineration flue gas comprises a scrubbing tower body 1 and a flue gas pipeline system 2 and a liquid pipeline system 3 connected to the scrubbing tower body 1; the flue gas pipeline system 2 comprises a smoke inlet pipeline 201 and a smoke exhaust pipeline 202 respectively connected to a smoke inlet 101 and a smoke outlet 102 of the scrubbing tower body 1;
[0022] The liquid pipeline system 3 includes a sewage main pipeline 301, a return main pipeline 302, a spray liquid return branch pipeline 303, a first spray liquid branch pipeline 304, a second spray liquid branch pipeline 305, a sampling branch pipeline 306 and a sewage branch pipeline 307;
[0023] One end of the sampling branch pipe 306 and the sewage branch pipe 307 are respectively connected to the sewage outlet 103 and the sampling return port 104 of the washing tower body 1, and the other end is respectively connected to the sewage main pipe 301 through the three-way valve 4. The sampling branch pipe 306 is provided with a concentration sensor 5;
[0024] One end of the reflux main pipe 302 is connected to the spray liquid outlet 105 of the washing tower body 1, and the other end is connected to one end of the first spray liquid branch pipe 304 and the second spray liquid branch pipe 305 respectively. The other ends of the first spray liquid branch pipe 304 and the second spray liquid branch pipe 305 are connected to the first spray liquid port 109 and the second spray liquid port 110 of the washing tower body 1 respectively. A water pump 6 is arranged on the reflux main pipe 302.
[0025] After the alkaline washing liquid in the alkaline washing layer at the bottom of the washing tower body 1 passes through the spray liquid reflux branch pipe 303 and the reflux main pipe 302, it is pumped into the first spray liquid branch pipe 304 and the second spray liquid branch pipe 305 by the water pump 6, thereby realizing the reuse of the alkaline washing liquid and greatly saving water resources; the concentration sensor 5 detects the alkaline washing liquid sample flowing out of the sampling reflux port 104, and when it does not meet the requirements, the sewage main pipe 301 is opened to discharge the alkaline washing liquid in the alkaline washing layer, thereby ensuring the quality of alkaline washing of the flue gas;
[0026] In a specific implementation, the concentration sensor 5 can be a pH sensor, as well as a sensor for measuring the concentration of products of acidic gases such as sulfur dioxide, hydrogen chloride, and hydrofluoric acid after alkaline washing.
[0027] Embodiment 2: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:
[0028] The liquid pipeline system 3 also includes an overflow branch pipeline 308, one end of which is connected to the overflow port 106 of the washing tower body 1, and the other end is connected to the sewage main pipeline 301. When there is too much alkaline washing liquid in the alkaline washing layer at the bottom of the washing tower body 1, it can be discharged through the overflow branch pipeline 308 to avoid affecting the normal operation of the washing tower.
[0029] Embodiment 3, this embodiment is a further improvement on the basis of embodiment 2, and its details are as follows:
[0030] The other end of the overflow branch pipe 308 is connected to the sampling branch pipe 306 through the three-way valve 4 and is located between the concentration sensor 5 and the sampling return port 104 of the washing tower body 1. The concentration sensor 5 can detect the liquid in the overflow branch pipe 308 and the sampling branch pipe 306 respectively.
[0031] Embodiment 4: This embodiment is a further improvement on the basis of embodiment 3, and its details are as follows:
[0032] The liquid pipeline system 3 also includes a sampling discharge branch pipeline 309 and a sampling return branch pipeline 310; one end of the sampling discharge branch pipeline 309 is respectively connected to the sampling branch pipeline 306 and the sampling return branch pipeline 310 through a three-way valve 4, and the other end is respectively connected to the sewage branch pipeline 307 and the sewage main pipeline 301, and the other end of the sampling return branch pipeline 310 is respectively connected to the spray liquid return branch pipeline 303 and the return main pipeline 302 through a three-way valve 4. According to the detection results of the concentration sensor 5 on the liquid in the overflow branch pipeline 308 and the sampling branch pipeline 306, it is selected to discharge the sampled or overflowed liquid to the sewage main pipeline 301 or the return main pipeline 302, so as to better manage and utilize water resources.
[0033] Embodiment 5, this embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:
[0034] The liquid pipeline system 3 also includes a clean water main pipeline 311, which is connected to a backwash branch pipeline 312 and a water replenishment branch pipeline 313 through a three-way valve 4. The backwash branch pipeline 312 is connected to the backwash port 107 of the washing tower body 1, and the water replenishment branch pipeline 313 is connected to the water replenishment port 108 of the washing tower body 1. The clean water main pipeline 311 can respectively provide water for backwashing and replenishment, which greatly saves pipeline resources.
[0035] Embodiment 6: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:
[0036] A Y-type filter 7 is provided on the return main pipeline 302 at the water inlet end of the water pump 6. The impurities brought out by the return main pipeline 302 can be filtered to avoid clogging or damage of the water pump 6.
[0037] Embodiment 7, this embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:
[0038] A check valve 8 is provided on the return main pipeline 302 at the water outlet of the water pump 6 to prevent the liquid pumped out by the water pump 6 from flowing back into the water pump 6.
[0039] Embodiment 8: This embodiment is a further improvement on the basis of Embodiment 1, and its details are as follows:
[0040] The smoke inlet pipe 201 and the smoke exhaust pipe 202 are both heat-insulated pipelines.
[0041] Insulated pipelines can maintain the temperature of flue gas and prevent it from condensing, ensuring that the flue gas maintains a suitable temperature and state when entering the scrubbing tower, thereby ensuring the scrubbing effect; insulated pipelines can also avoid additional heating requirements, thereby reducing energy consumption.
[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A wet deacidification system for incineration flue gas, characterized in that: The invention comprises a washing tower body (1) and a flue gas pipeline system (2) and a liquid pipeline system (3) connected to the washing tower body (1); the flue gas pipeline system (2) comprises a smoke inlet pipeline (201) and a smoke exhaust pipeline (202) respectively connected to a smoke inlet (101) and a smoke outlet (102) of the washing tower body (1); The liquid pipeline system (3) comprises a sewage main pipeline (301), a return main pipeline (302), a spray liquid return branch pipeline (303), a first spray liquid branch pipeline (304), a second spray liquid branch pipeline (305), a sampling branch pipeline (306) and a sewage branch pipeline (307); One end of the sampling branch pipe (306) and the sewage branch pipe (307) are respectively connected to the sewage outlet (103) and the sampling return port (104) of the washing tower body (1), and the other end is respectively connected to the sewage main pipe (301) through a three-way valve (4). A concentration sensor (5) is provided on the sampling branch pipe (306); One end of the reflux main pipe (302) is connected to the spray liquid outlet (105) of the washing tower body (1), and the other end is respectively connected to one end of the first spray liquid branch pipe (304) and the second spray liquid branch pipe (305); the other ends of the first spray liquid branch pipe (304) and the second spray liquid branch pipe (305) are respectively connected to the first spray liquid port (109) and the second spray liquid port (110) of the washing tower body (1); and a water pump (6) is arranged on the reflux main pipe (302).
2. The incineration flue gas wet deacidification system according to claim 1, characterized in that: The liquid pipeline system (3) further comprises an overflow branch pipeline (308), one end of which is connected to the overflow port (106) of the washing tower body (1), and the other end of which is connected to the sewage main pipeline (301).
3. The incineration flue gas wet deacidification system according to claim 2, characterized in that: The other end of the overflow branch pipe (308) is connected to the sampling branch pipe (306) via a three-way valve (4) and is located between the concentration sensor (5) and the sampling reflux port (104) of the washing tower body (1).
4. The incineration flue gas wet deacidification system according to claim 3, characterized in that: The liquid pipeline system (3) further comprises a sampling discharge branch pipeline (309) and a sampling return branch pipeline (310); one end of the sampling discharge branch pipeline (309) is respectively connected to the sampling branch pipeline (306) and the sampling return branch pipeline (310) via a three-way valve (4), and the other end is respectively connected to the sewage branch pipeline (307) and the sewage main pipeline (301); the other end of the sampling return branch pipeline (310) is respectively connected to the spray liquid return branch pipeline (303) and the return main pipeline (302) via a three-way valve (4).
5. The incineration flue gas wet deacidification system according to claim 1, characterized in that: The liquid pipeline system (3) further comprises a clean water main pipeline (311), wherein the clean water main pipeline (311) is respectively connected to a backwash branch pipeline (312) and a water replenishment branch pipeline (313) via a three-way valve (4); the backwash branch pipeline (312) is in communication with a backwash port (107) of the washing tower body (1), and the water replenishment branch pipeline (313) is in communication with a water replenishment port (108) of the washing tower body (1).
6. The incineration flue gas wet deacidification system according to claim 1, characterized in that: A Y-type filter (7) is provided on the return main pipeline (302) at the water inlet end of the water pump (6).
7. The incineration flue gas wet deacidification system according to claim 1, characterized in that: A check valve (8) is provided on the return main pipeline (302) at the water outlet end of the water pump (6).
8. The incineration flue gas wet deacidification system according to claim 1, characterized in that: The smoke inlet pipe (201) and the smoke exhaust pipe (202) are both heat-insulated pipelines.