Efficient operation system for treating waste gas and waste water

Abstract

The invention discloses an efficient operation system for treating waste gas and waste water, which comprises an alkaline washing tower, an aerobic tank, a demisting box, an oxidation spray tower, a second fan and an exhaust funnel, the alkaline washing tower is provided with a waste gas inlet, the aerobic tank is provided with a waste water inlet, the alkaline washing tower is provided with a first outlet and a second outlet, the oxidation spray tower is provided with a third outlet and a fourth outlet, and the second fan is provided with a third outlet and a fourth outlet. A first outlet of the alkaline washing tower is connected with a biological tower through a pipeline, an outlet of the biological tower is connected with an inlet of an oxidation spraying tower through a pipeline, a third outlet of the oxidation spraying tower is connected with an exhaust funnel through a pipeline, a fourth outlet of the oxidation spraying tower is connected with a pollution discharge pool through a pipeline, and a second outlet of the alkaline washing tower is connected with a demisting box through a pipeline; an outlet of the demisting box is connected with an activated carbon adsorption tower through a pipeline, an outlet of the activated carbon adsorption tower is connected with an exhaust funnel through a pipeline, and an outlet of the aerobic tank is connected with a biological tower through a pipeline. The device is suitable for occasions with various pollutant treatment requirements of waste gas and waste water, and the purification effect is high.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular to a highly efficient operation system capable of treating both waste gas and waste water. Background Art

[0002] With the development of industry, many factories will produce a large amount of wastewater and waste gas during operation. Factory waste gas often includes volatile organic compounds (VOCs) such as hydrocarbons and malodorous gases such as hydrogen sulfide, organic sulfur, and ammonia. In addition to making people feel uncomfortable, these malodorous gases are also very harmful to the human body. Volatile organic compounds (VOCs) refer to organic compounds with a saturated vapor pressure of about greater than 70Pa at room temperature and a boiling point of less than 250°C at normal pressure. These include alkanes, aromatics, olefins, alcohols, ethers, etc., which are the most common pollutants emitted by the petrochemical industry and have a huge destructive effect on the environment. The production wastewater and domestic sewage in the factory area have not been uniformly treated, which has caused serious impacts on people's lives and the environment.

[0003] Chinese patent publication number CN 214880855 U discloses a waste gas and wastewater coordinated treatment device, including wastewater treatment equipment, waste gas treatment equipment, a fan, a spray tower and an air duct, wherein a coarse filter tank and an aeration tank are arranged inside the wastewater treatment equipment, and a filter tank partition and a filter screen are in the middle of the wastewater treatment equipment, wherein the filter tank partition is integrated with the wastewater treatment equipment at the bottom, and the filter screen is at the top, wherein the waste gas treatment equipment includes a waste gas inlet, a cooler, a filter partition, an activated carbon treatment layer and a rear waste gas outlet, wherein the wastewater treatment equipment is connected to the waste gas treatment equipment through an air duct, and the waste gas treatment equipment is connected to the fan through the air duct, wherein the fan is connected to the spray tower through an air outlet duct, and wherein the air duct is connected to the waste gas treatment equipment, the wastewater treatment equipment and the fan through a flange. The above-mentioned prior art lacks an alkaline washing tower and a biological tower when treating waste gas, and is unable to remove the acidic components in the waste gas and treat the waste gas and odorous gas molecules by cultivating microbial membranes. At the same time, when the above-mentioned prior art fails and needs maintenance, there is no backup plan to continue treating the waste gas. The whole technology can only be shut down and wait for the faulty device to be repaired before restarting to treat the waste gas. The treated wastewater does not go through the process of the biological tower, and the overall treatment efficiency is low.

[0004] At present, my country's purification treatment of waste gas and wastewater basically has one set of processes, without a preset emergency system, high cost and low treatment efficiency, and high site requirements, which greatly increases construction and operation costs. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and to provide an efficient operation system for treating waste gas and wastewater, which solves the problems of the current waste gas treatment device failing and being unable to continue operating, the high cost of the treatment system, the low treatment efficiency and the high site requirements.

[0006] The technical solution adopted by the present invention is as follows: The invention discloses an efficient operation system for treating waste gas and waste water, comprising an alkali washing tower, an aerobic pool, a demister box, an oxidation spray tower, a second fan and an exhaust pipe. The alkali washing tower is provided with a waste gas inlet, the aerobic pool is provided with a waste water inlet, the alkali washing tower is provided with a first outlet and a second outlet, the oxidation spray tower is provided with a third outlet and a fourth outlet, the first outlet of the alkali washing tower is connected with a biological tower through a pipeline, the outlet of the biological tower is connected with the inlet of the oxidation spray tower through a pipeline, the third outlet of the oxidation spray tower is connected with the exhaust pipe through a pipeline, the fourth outlet of the oxidation spray tower is connected with a sewage tank through a pipeline, the second outlet of the alkali washing tower is connected with a demister box through a pipeline, the outlet of the demister box is connected with an activated carbon adsorption tower through a pipeline, the outlet of the activated carbon adsorption tower is connected with the exhaust pipe through a pipeline, and the outlet of the aerobic pool is connected with the biological tower through a pipeline.

[0007] Furthermore, a first one-way valve and a second one-way valve are respectively provided at the first outlet and the second outlet.

[0008] Furthermore, multiple demisting layers are arranged inside the demisting box, and the distance between each two adjacent demisting layers is 16-20 cm.

[0009] Furthermore, a second fan is connected between the third outlet of the oxidation spray tower and the exhaust pipe.

[0010] Furthermore, the aerobic pool is connected to a first fan.

[0011] Furthermore, an electrically sliding awning is provided on the top of the exhaust pipe.

[0012] The beneficial effects of the present invention are: (1) The present invention sets up an emergency backup system in the waste gas treatment process. When the biological tower or oxidation spray tower in the conventional waste gas treatment system fails and needs to be shut down for maintenance, the system immediately activates the emergency backup system to treat the waste gas, without the need to shut down the entire system and wait for the faulty device to be repaired before restarting to continue to treat the waste gas, which greatly improves the waste gas treatment efficiency; (2) In the present invention, biological towers and oxidation spray towers are used to treat wastewater and waste gas, which can remove acidic components in waste gas and treat odorous gas molecules in waste gas and wastewater by cultivating microbial membranes, so that the treatment is very thorough; (3) The present invention is applicable to situations where multiple pollutant treatment is required, such as treating waste gas, waste water, or treating waste gas and waste water simultaneously. The purification effect is very high and the construction and operation costs of pollutant treatment are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the efficient operation system for treating waste gas and waste water of the present invention.

[0014] In the figure, 1, alkaline washing tower; 2, aerobic pool; 3, demisting box; 4, biological tower; 5, oxidation spray tower; 6, exhaust gas inlet; 7, wastewater inlet; 8, first fan; 9, second fan; 10, first outlet; 11, second outlet; 12, exhaust pipe; 13, sewage tank; 14, activated carbon adsorption tower; 15, demisting layer; 16, third outlet; 17, fourth outlet; 18, awning; 19, first one-way valve; 20, second one-way valve. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings: like Figure 1 As shown, the present invention comprises an alkali washing tower 1, an aerobic pool 2, a demister box 3, an oxidation spray tower 5, a second fan 9 and an exhaust pipe 12, wherein the alkali washing tower 1 is provided with a waste gas inlet 6, the aerobic pool 2 is provided with a waste water inlet 7, the alkali washing tower 1 is provided with a first outlet 10 and a second outlet 11, and the oxidation spray tower 5 is provided with a third outlet 16 and a fourth outlet 17.

[0016] The first outlet 10 of the alkali washing tower 1 of the present invention is connected to the biological tower 4 through a pipeline, and the waste gas enters the alkali washing tower 1 through the waste gas inlet 6, and the acidic components in the waste gas are removed by the acid-base neutralization principle; then the waste gas with the acidic components removed enters the biological tower 4, and the waste gas is treated again by cultivating microbial membranes using a biological method.

[0017] The outlet of the biological tower 4 of the present invention is connected to the inlet of the oxidation spray tower 5 through a pipeline, and the waste gas after the previous purification steps enters the oxidation spray tower 5, and the toxic and harmful substances in the waste gas are continuously degraded to purify the waste gas until the emission standard is met. The third outlet 16 of the oxidation spray tower 5 is connected to the exhaust pipe 12 through a pipeline, and the fourth outlet 17 of the oxidation spray tower 5 is connected to the sewage pool 13 through a pipeline, wherein the third outlet 10 of the oxidation spray tower 5 is connected to the exhaust pipe 12 with a second fan 9, and the purified waste gas enters the exhaust pipe 12 under the action of the second fan 9 and is discharged into the atmosphere; the top of the exhaust pipe 12 is provided with an electrically movable rain shelter 18 to prevent rain and snow from entering the exhaust tower 12 in bad weather such as rain and snow, thereby affecting the subsequent exhaust gas discharge.

[0018] The second outlet 11 of the alkali washing tower 1 of the present invention is connected to the demisting box 3 through a pipeline, and the outlet of the demisting box 3 is connected to the activated carbon adsorption tower 14 through a pipeline, and the outlet of the activated carbon adsorption tower 14 is connected to the exhaust pipe 12 through a pipeline. This waste gas treatment process is an emergency system. When the biological tower 4 and the oxidation spray tower 5 fail and need to be shut down for maintenance, there is no need to shut down the entire system and wait for the faulty device to be repaired before restarting to continue to treat the waste gas. The waste gas can continue to be treated through the emergency system, which greatly improves the waste gas treatment efficiency; wherein the demisting box 3 mainly utilizes physical interception to reduce the water content in the waste gas, and a plurality of demisting layers 15 are arranged inside the demisting box 3, and the spacing between each adjacent two demisting layers 15 is 16-20cm, which facilitates the full contact between the demisting layer and the waste gas, can effectively reduce the water content in the waste gas, and improve the demisting efficiency.

[0019] The outlet of the aerobic pool 2 of the present invention is connected to the biological tower 4 through a pipeline. The function of the aerobic pool 2 is to allow the activated sludge to perform aerobic respiration, further decompose organic matter into inorganic matter, and remove pollutants. Wastewater enters the aerobic pool 2 through the wastewater inlet 7, and the pollutants in the wastewater are first removed; then the wastewater with pollutants removed enters the biological tower 4, and the process of removing odorous gas molecules in the wastewater is carried out; the aerobic pool 2 is connected to a first fan 8 for aerating and oxygenating the inside of the aerobic pool 2.

[0020] The first outlet 10 and the second outlet 11 of the present invention are respectively provided with a first one-way valve 19 and a second one-way valve 20 for controlling the flow direction of the exhaust gas; the conventional operation system of the exhaust gas treatment is: close the second one-way valve 20, open the first one-way valve 19, and allow the exhaust gas treated by the alkali washing tower 1 to flow through the biological tower 4, the oxidation spray tower 5 and the exhaust pipe 12 in sequence; if the biological tower 4 and the oxidation spray tower 5 fail to maintain, close the first one-way valve 19, open the second one-way valve 20 to start the exhaust gas treatment emergency system, and allow the exhaust gas treated by the alkali washing tower 1 to flow through the demisting box 3, the activated carbon adsorption tower 14 and the exhaust pipe 12 in sequence.

[0021] The use process of the present invention is as follows: When in use, the waste gas discharge pipe and the waste water discharge pipe of the sewage station in the factory are connected to the waste gas inlet 6 and the waste water inlet 7 respectively, and the first one-way valve 19 is opened and the second one-way valve 20 is closed. The waste gas in the sewage station first enters the alkaline washing tower 1 through the pipeline, and the acidic components in the waste gas are removed by the acid-base neutralization principle; then the waste gas with the acidic components removed enters the biological tower 4 through the pipeline, and the waste gas is treated again with odorous substances by cultivating microbial membranes using a biological method; finally, the waste gas with the odorous substances removed enters the oxidation spray tower 5 through the pipeline, and continues to degrade toxic and harmful substances in the waste gas until it meets the emission standards and is discharged from the exhaust pipe 12.

[0022] The wastewater stored in the sewage station first enters the aerobic tank 2 through a pipe, so that the wastewater and the aerobic tank 2 can fully react to remove pollutants in the wastewater; then it enters the biological tower 4 through a pipe to remove the malodorous gas molecules generated in the wastewater; finally, the wastewater with the malodorous gas molecules removed enters the oxidation spray tower 5 through a pipe to continue to degrade the toxic and harmful substances in the wastewater until it meets the emission standards and is discharged into the sewage tank 13.

[0023] Wastewater is treated regularly, while waste gas is treated continuously for a long time. When the biological tower 4 and the oxidation spray tower 5 malfunction and are shut down for maintenance, the present treatment system starts the waste gas treatment emergency system, opens the second one-way valve 20 and closes the first one-way valve 19 at the same time, so that the waste gas treated by the alkali washing tower 1 first enters the demisting box 3, and uses physical interception to reduce the water content in the waste gas; the waste gas without mist then enters the activated carbon adsorption tower 14 through a pipeline to adsorb pollutants until it meets the emission standards and is discharged from the exhaust pipe 12.

[0024] Other unexplained parts of the present invention are the same as those of the prior art.

Claims

1. A high-efficiency operation system for treating waste gas and waste water, comprising an alkali scrubber (1), an aerobic tank (2), a demister (3), an oxidation spray tower (5), a second fan (9) and an exhaust pipe (12), wherein the alkali scrubber (1) is provided with a waste gas inlet (6), and the aerobic tank (2) is provided with a waste water inlet (7), characterized in that: The alkali washing tower (1) is provided with a first outlet (10) and a second outlet (11), and the oxidation spray tower (5) is provided with a third outlet (16) and a fourth outlet (17). The first outlet (10) of the alkali washing tower (1) is connected to a biological tower (4) via a pipeline, and the outlet of the biological tower (4) is connected to an inlet of the oxidation spray tower (5) via a pipeline. The third outlet (16) of the oxidation spray tower (5) is connected to an exhaust pipe (12) via a pipeline, and the fourth outlet (17) of the oxidation spray tower (5) is connected to a sewage tank (13) via a pipeline. The second outlet (11) of the alkali washing tower (1) is connected to a demisting box (3) via a pipeline, and the outlet of the demisting box (3) is connected to an activated carbon adsorption tower (14) via a pipeline, and the outlet of the activated carbon adsorption tower (14) is connected to the exhaust pipe (12) via a pipeline. The outlet of the aerobic tank (2) is connected to the biological tower (4) via a pipeline.

2. The high-efficiency operation system for treating waste gas and wastewater according to claim 1 is characterized in that: A first one-way valve (19) and a second one-way valve (20) are respectively provided at the first outlet (10) and the second outlet (11).

3. The high-efficiency operation system for treating waste gas and wastewater according to claim 1 is characterized in that: The demisting box (3) is provided with multiple demisting layers (15) inside, and the distance between each two adjacent demisting layers (15) is 16-20 cm.

4. The high-efficiency operation system for treating waste gas and waste water according to claim 1 is characterized in that: A second fan (9) is connected between the third outlet (16) of the oxidation spray tower (5) and the exhaust pipe (12).

5. The high-efficiency operation system for treating waste gas and waste water according to claim 1 is characterized in that: The aerobic pool (2) is connected to a first fan (8).

6. The high-efficiency operation system for treating waste gas and waste water according to claim 1 is characterized in that: The top of the exhaust pipe (12) is provided with an electrically movable rain shelter (18).

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