CN117185483A - An energy-saving and emission reduction device and method for sewage treatment - Google Patents
An energy-saving and emission reduction device and method for sewage treatment Download PDFInfo
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- CN117185483A CN117185483A CN202310936749.6A CN202310936749A CN117185483A CN 117185483 A CN117185483 A CN 117185483A CN 202310936749 A CN202310936749 A CN 202310936749A CN 117185483 A CN117185483 A CN 117185483A
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Abstract
The invention relates to a sewage treatment energy-saving and emission-reducing device and a sewage treatment energy-saving and emission-reducing method, wherein the device comprises a non-aeration biological tank (1), an aeration biological tank (2) and a closed air chamber (3); the aeration-free biological tank (1) is communicated with a gas storage film (5) in the closed air chamber (3) through a gas guide pipe (4), the closed air chamber (3) is communicated with a blast pipe (6), and the gas storage film (5) is communicated with the aeration biological tank (2) through an aeration pipe (7). Compared with the prior art, the invention enables malodor and greenhouse gases generated by biochemistry to be monitored, stored and reused on site, and reduces the waste of energy resources.
Description
Technical Field
The invention relates to the technical field of energy conservation and environmental protection, in particular to an energy conservation and emission reduction device and method for sewage treatment.
Background
The energy-saving environment-friendly industry is taken as an important supporting force for green development, and is in charge of a great historical development opportunity. The biochemical treatment process is still the main technology in the sewage treatment field nowadays, and organic pollutants (such as BOD) in the sewage are degraded by microorganisms 5 TN, etc.) to harmless gaseous products, liquid products and organic-rich solid products. Compared with the physical and chemical treatment processes, the biochemical treatment process has the advantages of lower investment and better effect. The biochemical treatment generally comprises three processes of anaerobic, anoxic and aerobic, and due to the complexity of biochemical action, the anaerobic and anoxic processes may be accompanied by small amounts of toxic byproducts (such as H 2 S) generation of greenhouse gases. In the early sewage treatment process, a small amount of malodor and greenhouse gas generated in the anaerobic and anoxic process are not emphasized, then the malodor and the greenhouse gas are pumped to a centralized treatment center through a fan in a capping and pumping mode, and then the wastewater is discharged after reaching standards, but the method of centralized treatment after the fan pumping causes great waste of resource energy because of small concentration and large air quantity of the malodor and the greenhouse gas generated in the anoxic and anaerobic process.
Disclosure of Invention
The invention aims to provide an energy-saving and emission-reducing device and method for sewage treatment.
The aim of the invention can be achieved by the following technical scheme: an energy-saving and emission-reducing device for sewage treatment comprises a non-aeration biological tank, an aeration biological tank and a closed air chamber;
the aeration-free biological tank is communicated with the gas storage film in the closed air chamber through the gas guide pipe, the closed air chamber is communicated with the blast pipe, and the gas storage film is communicated with the aeration biological tank through the aeration pipe.
Preferably, the tank top of the aeration-free biological tank is provided with a guide and discharge small chamber higher than the tank top, the guide and discharge pipe is communicated with the guide and discharge small chamber and the gas storage film, and the guide and discharge pipe is provided with a first valve.
Preferably, a stirrer is arranged in the non-aeration biological tank, and a leak-proof water seal is arranged between the stirrer and the top of the non-aeration biological tank.
Preferably, the top of the aeration-free biological tank is sealed, and a closed manhole and an observation hole are formed in the top of the aeration-free biological tank.
Preferably, the non-aeration biological tank is connected with a water inlet mud pipe, a water outlet slope wall is arranged on the water outlet side of the non-aeration biological tank, and the water outlet slope wall is arranged between the non-aeration biological tank and the aeration biological tank. The water outlet slope wall can play a role in diversion and water sealing, and can also avoid local reflux caused by local turbulence in the aeration process of the aeration biological tank.
Further preferably, the end point of the water outlet slope wall is higher than the bottom of the overflow hole, and if the liquid level of the non-aeration biological tank falls below the overflow hole, the water of the aeration biological tank cannot flow back to the non-aeration biological tank.
Preferably, the aeration pipe is provided with a second valve, and the blast pipe is provided with a third valve.
Preferably, a distance meter for measuring the air full state of the air storage film is arranged below the air storage film, the air storage film is connected with a nitrogen analysis instrument and a carbon dioxide analysis instrument, and a sampling valve is arranged on the guide tube.
Preferably, the bottom of the gas storage film is provided with a condensed water discharging component.
Preferably, the blast pipe is connected with an aeration branch pipe, and the aeration branch pipe is communicated with an aeration biological tank;
an oxidation state nitrogen reflux pipe is arranged between the aeration-free biological tank and the aeration biological tank, and an oxidation state nitrogen reflux pump is arranged on the oxidation state nitrogen reflux pipe.
Preferably, the gas storage film is made of high-strength flame-retardant materials with biogas permeation resistance, wear resistance, fold resistance and hydrogen sulfide corrosion resistance, and the operating pressure is 2-5 kpa.
Preferably, the effective volume of the gas storage film is not less than 10% of the daily sewage flow.
The energy-saving and emission-reducing sewage treatment method is carried out by using the device and comprises the following steps:
s1: sewage flows into the aeration-free biological tank through the water inlet mud pipe, malodor and greenhouse gas generated by anaerobic/anoxic reaction in the aeration-free biological tank enter the empty gas storage film in the sealed gas chamber through the gas guide pipe, at the moment, the first valve is in an open state, and the second valve and the third valve are in a closed state;
s2: when the gas storage membrane is full, the first valve is closed, the second valve and the third valve are opened, and the gas in the gas storage membrane is discharged to the aeration biological tank for cooperative aeration through the blast pipe and the aeration pipe;
s3: when the gas amount in the gas storage film is reduced to a set value, the first valve is opened, the second valve and the third valve are closed, and no foul smell and greenhouse gas generated by the reaction in the aeration biological tank are continuously discharged into the gas storage film;
sewage enters the aeration biological tank through the water outlet slope wall after anaerobic/anoxic reaction occurs in the aeration biological tank.
Preferably, in step S3, when the gas amount in the gas storage film is reduced to 20% of the gas storage film full state gas amount, the first valve is opened, and the second valve and the third valve are closed.
Preferably, the first valve, the second valve, the third valve and the range finder are all connected with the controller.
Preferably, the blast pressure is constantly greater than the pressure in the gas storage membrane.
Further preferably, the blast pressure is constantly greater than 0.6Mpa.
Preferably, the aeration-free biological tank and the air chamber are both closed.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides an energy-saving and emission-reducing device and method for sewage treatment, which enable malodor and greenhouse gases generated by biochemistry to be monitored, stored and reused on site, so that the waste of energy resources is reduced;
2. according to the invention, through the cooperation of the air storage film, the air guide pipe, the blast pipe and the aeration pipe, the malodor and the greenhouse gas generated by anaerobic/anoxic reaction in the aeration-free biological tank can be stored in the empty air storage film, the gas emission of the aeration-free biological tank is reduced, a deodorizing device is not required to be additionally arranged for collecting the space malodor of the aeration-free biological tank, the investment of the deodorizing device is reduced, the collected gas can be used for aerating the aeration biological tank, and the waste of energy resources is reduced;
4. the aeration-free biological tank can play a role in diversion and water sealing through the arrangement of the water outlet slope wall, and can also avoid local reflux caused by local turbulence in the aeration process of the aeration biological tank;
5. the invention can be used for the co-monitoring and storing on-site decrement device of malodorous gas and greenhouse gas of the conventional aeration-free biological tanks such as anoxic tanks, anaerobic tanks and the like, and can also be used for places where gas such as mud storage tanks, mud concentration tanks and the like emits similar gas;
6. the aeration-free biological tank and the air chamber are designed in a closed manner, so that the risk of malodor and greenhouse gas leakage can be reduced, and the safety of operation and production of the aeration-free biological tank is ensured;
7. the aeration-free biological tank guide and discharge small chamber is arranged, so that malodor and greenhouse gas generated by biological reaction of the aeration-free biological tank can be collected preliminarily, foam scum of the aeration-free biological tank is prevented from blocking the guide and discharge pipe, and the gas is convenient to discharge into a gas storage film;
8. the linkage design of the valve and the range finder realizes the automatic operation of odor collection and emission.
Drawings
FIG. 1 is a schematic diagram of a sewage treatment energy-saving and emission-reducing device;
in the figure: the device comprises a 1-aeration-free biological tank, a 2-aeration biological tank, a 3-closed air chamber, a 4-guide and discharge pipe, a 5-air storage film, a 6-blast pipe, a 7-aeration pipe, a 8-guide and discharge small chamber, a 9-stirrer, a 10-leak-proof water seal, a 11-manhole, a 12-observation hole, a 13-water inlet mud pipe, a 14-water outlet slope wall, a 15-range finder, a 16-aeration branch pipe, a 17-oxidation state nitrogen return pipe, a 18-oxidation state nitrogen return pump, an a-first valve, a b-second valve, a c-third valve, a d-sampling valve, an e-nitrogen analysis instrument and a carbon dioxide analysis instrument, an f-pressure relief valve and a g-automatic drain valve.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following examples.
Example 1
An energy-saving and emission-reducing device for sewage treatment is shown in figure 1, and comprises an aeration-free biological tank 1, an aeration biological tank 2 and a closed air chamber 3.
Wherein, no aeration biological tank 1 passes through air duct 4 intercommunication airtight air chamber 3 internal air storage membrane 5, and air storage membrane 5 passes through aeration pipe 7 intercommunication aeration biological tank 2, and blast pipe 6 communicates with airtight air chamber 3.
The device can monitor and store malodor and greenhouse gas generated by biochemistry on site and make secondary use, thereby reducing the waste of energy resources.
Example 2
The energy-saving and emission-reducing sewage treatment device is characterized in that a guide-exhaust small chamber 8 higher than the tank top is arranged on the tank top of the aeration-free biological tank 1, the guide-exhaust pipe 4 is communicated with the guide-exhaust small chamber 8 and the air storage film 5, the air storage film 5 is communicated with the aeration biological tank 2 through an aeration pipe 7, and a blast pipe 6 is communicated with the closed air chamber 3. The top of the aeration-free biological tank 1 is sealed, and a closed manhole 11 and an observation hole 12 are arranged on the top. The non-aeration biological tank 1 is internally provided with a stirrer 9, and a leak-proof water seal 10 is arranged between the stirrer 9 and the top of the non-aeration biological tank 1. The non-aeration biological tank 1 is connected with a water inlet mud pipe 13, and a water outlet slope wall 14 is arranged between the non-aeration biological tank 1 and the aeration biological tank 2.
The guide and discharge pipe 4 is provided with a first valve a, the aeration pipe 7 is provided with a second valve b, and the blast pipe 6 is provided with a third valve c.
The energy-saving and emission-reducing sewage treatment method is carried out by using the device and comprises the following steps:
s1: sewage flows into the aeration-free biological tank 1 through the water inlet mud pipe 13, malodor and greenhouse gas generated by anaerobic/anoxic reaction in the aeration-free biological tank 1 enter the empty gas storage film 5 in the closed air chamber 3 through the gas guide pipe, at the moment, the first valve a is in an open state, and the second valve b and the third valve c are in a closed state;
s2: when the gas storage film 5 is full, the first valve a is closed, the second valve b and the third valve c are opened, and the gas in the gas storage film 5 is discharged to the aeration biological tank 2 through the blast pipe 6 and the aeration pipe 7 for cooperative aeration;
s3: when the gas amount in the gas storage film 5 is reduced to a set value, the first valve a is opened, the second valve b and the third valve c are closed, and no malodor and greenhouse gas generated by the reaction in the aeration biological tank 1 are continuously discharged into the gas storage film 5;
in the process, sewage enters the aeration biological tank 2 through the water outlet slope wall 14 after anaerobic/anoxic reaction occurs in the aeration biological tank 1.
Example 3
The utility model provides a sewage treatment energy saving and emission reduction device, is equipped with distancer 15 below air storage membrane 5 for measure air-filled state of air storage membrane 5, air storage membrane 5 is connected with nitrogen analysis instrument and carbon dioxide analysis instrument e, and air storage membrane 5 bottom is equipped with the comdenstion water and discharges the subassembly. The guide tube 4 is provided with a sampling valve d. The remainder was the same as in example 2.
Example 4
An energy-saving and emission-reducing device for sewage treatment is provided, which aims at preventing condensed water from gathering in a gas storage film 5, and a condensed water discharging component is arranged at the bottom. The discharging component consists of a condensed water collecting pipe, a differential pressure liquid level meter and a condensed water pneumatic valve, and after the condensed water reaches a fixed liquid level, the pneumatic valve is operated to open and discharge condensed water to a certain liquid level, and then the valve is closed. The above steps are repeated. The remainder was the same as in example 3.
Example 5
An energy-saving and emission-reducing device for sewage treatment is characterized in that the blast pipe 6 is also connected with an aeration branch pipe 16, and the aeration branch pipe 16 is communicated with the aeration biological tank 2. An oxidation state nitrogen reflux pipe 17 is arranged between the non-aeration biological tank 1 and the aeration biological tank 2, the oxidation state nitrogen reflux pipe 17 is communicated with the non-aeration biological tank 1 and the aeration biological tank 2 from the bottom of the tank, and an oxidation state nitrogen reflux pump 18 is arranged on the oxidation state nitrogen reflux pipe 17. The remainder was the same as in example 4.
The mixed liquor of the aeration biological tank 2 is returned to the non-aeration biological tank 1, in order to ensure the air tightness of the non-aeration biological tank 1, an oxidation state nitrogen reflux pump 18 adopts a submerged water form to replace a conventional reflux pump to lift the mixed liquor to a reflux canal, and then the mixed liquor falls into the non-aeration biological tank 1.
Example 6
The sewage treatment energy-saving emission-reducing device has the advantages that the aeration-free biological tank 1 is completely closed, all manholes 11, observation holes 12 and the like are closed, and the installation holes of equipment such as a stirrer 9 and the like are sealed by adopting a water seal. The water outlet slope wall 14 can prevent the oxygen-containing water in the aeration biological tank 2 from flowing back to the aeration-free biological tank 1. The top of the aeration-free biological tank 1 is provided with a guide and discharge small chamber 8 which is higher than the top of the tank to prevent the Dusai guide and discharge pipe 4 such as foam scum and the like. The airtight air chamber 3 is internally provided with an air storage film 5, and the lower part is provided with a range finder 15 for detecting the air storage volume. The closed air chamber 3 is connected with a blast pipe 6, and the air storage film 5 can be discharged to the tail end of the aeration biological tank 2 during blast pressurization.
The working principle of the device of the embodiment is as follows:
1. sewage flows into the closed aeration-free biological tank 1 through the submerged pipelines at the two ends, and enters the aeration biological tank 2 through the slope wall at the lower end in the tank after anaerobic/anoxic reaction occurs in the aeration-free biological tank 1. Malodorous gas and greenhouse gas generated by anaerobic/anoxic reaction in the aeration-free biological tank 1 enter a guide and discharge small chamber 8 higher than the tank top, gradually enter an empty gas storage film 5 in the closed air chamber 3 through a guide and discharge pipe 4 communicated with the guide and discharge small chamber 8, and at the moment, the first valve a is in an open state, and the second valve b and the third valve c are in a closed state. Malodor and greenhouse gas generated in anaerobic and anoxic biochemical processes are collected by the gas storage film 5 and are not required to be pumped into the odor centralized treatment device by adopting a fan. Through calculation, the air quantity sucked by the deodorizing fan in the anaerobic and anoxic process is the water surface area multiplied by the unit area ventilation index (3 m) 3 /m 2 H) +water surface area x ultra high x space ventilation (1-2 times/h). Examples: about 3200m is needed for a sewage treatment plant of 10 ten thousand tons/day 2 Anaerobic anoxic tank area, deodorizing air quantity of 14000m 3 And/h, about 15kw deodorizing fans are needed to be configured, and the corresponding energy consumption is saved by about 360kwh/d.
2. The distance meter 15 is arranged at the lower end of the air storage film 5 to measure the air-filled state of the air storage film. When the gas storage process of the gas storage membrane is completed to realize the full state, the first valve a is closed, the second valve b and the third valve c are opened, and the gas in the gas storage membrane 5 is discharged to the aeration biological pond 2 for cooperative aeration through the pressure of the air blower of the aeration pond, so that the emission of malodor and greenhouse gas is reduced. The emission reduction amount of malodorous gas and greenhouse gas can be calculated in real time through online analysis instruments such as nitrogen, carbon dioxide and the like connected to the gas storage film 5.
3. When the gas amount in the gas storage film 5 is reduced to a set threshold value, the second valve b and the third valve c are closed, the first valve a is opened, and no malodor and greenhouse gas generated by the reaction in the aeration biological tank 1 are continuously discharged into the gas storage film 5.
4. When the pressure of the gas storage film 5 reaches a full state critical value, the pressure release valve f is temporarily opened to release the pressure, and the pressure release valve f is closed after the pressure reaches balance. The bottom of the gas storage film 5 is provided with an automatic drain valve g and a differential pressure liquid level meter, and when the liquid level at the bottom reaches a specified scale, the waste water condensed in the gas storage film 5 is discharged.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (10)
1. The energy-saving and emission-reducing sewage treatment device is characterized by comprising an aeration-free biological tank (1), an aeration biological tank (2) and a closed air chamber (3);
the aeration-free biological tank (1) is communicated with a gas storage film (5) in the closed air chamber (3) through a gas guide pipe (4), the closed air chamber (3) is communicated with a blast pipe (6), and the gas storage film (5) is communicated with the aeration biological tank (2) through an aeration pipe (7).
2. The sewage treatment energy-saving and emission-reducing device according to claim 1, wherein a guide and discharge small chamber (8) higher than the tank top is arranged on the tank top of the aeration-free biological tank (1), the guide and discharge small chamber (8) and the air storage film (5) are communicated by the guide and discharge pipe (4), and a first valve (a) is arranged on the guide and discharge pipe (4).
3. The sewage treatment energy-saving and emission-reducing device according to claim 1, wherein a stirrer (9) is arranged in the aeration-free biological tank (1), and a leak-proof water seal (10) is arranged between the stirrer (9) and the tank top of the aeration-free biological tank (1).
4. The sewage treatment energy-saving and emission-reducing device according to claim 1, wherein the top of the aeration-free biological tank (1) is sealed, and a closed manhole (11) and an observation hole (12) are arranged on the aeration-free biological tank.
5. The sewage treatment energy-saving and emission-reducing device according to claim 1, wherein the non-aeration biological tank (1) is connected with a water inlet mud pipe (13), a water outlet slope wall (14) is arranged on the water outlet side of the non-aeration biological tank (1), and the water outlet slope wall (14) is arranged between the non-aeration biological tank (1) and the aeration biological tank (2).
6. The energy-saving and emission-reducing sewage treatment device according to claim 1, wherein the aeration pipe (7) is provided with a second valve (b), and the blast pipe (6) is provided with a third valve (c).
7. The sewage treatment energy-saving and emission-reducing device according to claim 1, wherein a distance meter (15) for measuring the air-filled state of the air storage film is arranged below the air storage film (5), the air storage film (5) is connected with a nitrogen analysis instrument and a carbon dioxide analysis instrument, and a sampling valve (d) is arranged on the guide tube (4).
8. The sewage treatment energy-saving and emission-reducing device according to claim 1, wherein a condensed water discharging component is arranged at the bottom of the gas storage film (5).
9. The sewage treatment energy-saving and emission-reducing device according to claim 1, wherein the blast pipe (6) is connected with an aeration branch pipe (16), and the aeration branch pipe (16) is communicated with the aeration biological tank (2);
an oxidation state nitrogen reflux pipe (17) is arranged between the aeration-free biological tank (1) and the aeration biological tank (2), and an oxidation state nitrogen reflux pump (18) is arranged on the oxidation state nitrogen reflux pipe (17).
10. A method for energy conservation and emission reduction of sewage treatment, which is characterized by using the device of any one of claims 1-9, comprising the following steps:
s1: sewage flows into the aeration-free biological tank (1) through the water inlet mud pipe (13), malodor generated by anaerobic/anoxic reaction in the aeration-free biological tank (1) and greenhouse gas enter the empty gas storage membrane (5) in the closed air chamber (3) through the gas guide pipe, at the moment, the first valve (a) is in an open state, and the second valve (b) and the third valve (c) are in a closed state;
s2: when the gas storage membrane (5) is full, the first valve (a) is closed, the second valve (b) and the third valve (c) are opened, and the gas in the gas storage membrane (5) is discharged to the aeration biological tank (2) for cooperative aeration through the blast pipe (6) and the aeration pipe (7);
s3: when the gas amount in the gas storage film (5) is reduced to a set value, the first valve (a) is opened, the second valve (b) and the third valve (c) are closed, and no malodor and greenhouse gas generated by the reaction in the aeration biological tank (1) are continuously discharged into the gas storage film (5);
sewage enters the aeration biological tank (2) through the water outlet slope wall (14) after anaerobic/anoxic reaction occurs in the aeration biological tank (1).
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| CN202310936749.6A CN117185483B (en) | 2023-07-28 | 2023-07-28 | Sewage treatment energy-saving and emission-reducing device and method |
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| CN117185483A true CN117185483A (en) | 2023-12-08 |
| CN117185483B CN117185483B (en) | 2026-03-10 |
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Cited By (1)
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| CN119797573A (en) * | 2025-01-22 | 2025-04-11 | 中国电建集团中南勘测设计研究院有限公司 | A sewage blower energy-saving system and operation method |
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