Method for recovering and treating methane in sewage system

Abstract

The invention discloses a sewage system methane recovery treatment device which comprises a wastewater collection tank, an anaerobic tank and a water seal tank, the top end of the wastewater collection tank is fixedly connected with a motor, the outer wall of the wastewater collection tank is communicated with a first connecting pipe, one side of the wastewater collection tank is communicated with the anaerobic tank, and the other side of the wastewater collection tank is communicated with a second connecting pipe. The top end of the anaerobic jar is fixedly connected with a supporting block, the top end of the anaerobic jar is communicated with a second connecting pipe, the first connecting pipe and the second connecting pipe are mounted in a matched manner, one side of the anaerobic jar is communicated with a water-sealed jar, one side of the water-sealed jar is communicated with a gas-water separator, one side of the gas-water separator is fixedly connected with a desulfurization pump, and the other side of the gas-water separator is fixedly connected with a gas-liquid separator. According to the characteristics that carbon dioxide is easily dissolved in water and methane is insoluble in water, methane steam is obtained, and the methane steam can be recycled after being collected and stored. According to the system, pollution to the environment in the biogas combustion emptying process is avoided, meanwhile, the resource utilization rate is increased, and waste is turned into wealth.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and specifically provides a method for recycling and treating methane in a sewage system. Background Art

[0002] Most domestic sewage in general cities has been incorporated into the sewage sewer system. By setting up water regeneration facilities, the effluent from sewage treatment plants or the sewage in the sewage sewer system can be collected and treated to meet the water quality standards of reclaimed water, and then supplied to household users via the water distribution system, or used for other purposes such as industrial, agricultural, environmental landscape water use, and groundwater recharge.

[0003] Methane is generated after sewage treatment. However, at present, during sewage treatment, colloids, impurities, etc. in the water will cause blockages, and the generated methane is generally directly burned, and sulfides and other substances generated during combustion pollute the air.

[0004] Therefore, we propose a method for recycling and treating methane in a sewage system. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for recycling and treating methane in a sewage system to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A methane recycling and treating device for a sewage system, including a wastewater collection tank, an anaerobic tank, and a water seal tank. A motor is fixedly connected to the top of the wastewater collection tank. A first connecting pipe is connected to the outer wall of the wastewater collection tank. One side of the wastewater collection tank is connected to the anaerobic tank. A support block is fixedly connected to the top of the anaerobic tank. A second connecting pipe is connected to the top of the anaerobic tank. The first connecting pipe and the second connecting pipe are cooperatively installed. One side of the anaerobic tank is connected to the water seal tank. One side of the water seal tank is connected to a gas-liquid separator. A desulfurization pump is fixedly connected to one side of the gas-liquid separator. One side of the desulfurization pump is connected to a low-pressure storage tank. One side of the low-pressure storage tank is connected to a booster pump. One side of the booster pump is connected to a high-pressure storage tank. One side of the high-pressure storage tank is connected to a purifier. One side of the purifier is connected to a fuel boiler. A clogging removal device is provided at the top of the wastewater collection tank.

[0007] Preferably, the blockage clearing device comprises: a fixed sleeve, a connecting shaft and a driving gear, the top end of the support block is fixedly connected with the fixed sleeve, the middle part of the inner wall of the fixed sleeve is rotatably connected with the connecting shaft, the output end of the motor extends into the fixed sleeve and is fixedly connected with the connecting shaft, the output end of the motor is fixedly connected with the driving gear, one side of the fixed sleeve is rotatably connected with a guide rod, one end of the guide rod is fixedly connected with a one-way gear, the driving gear is meshed with the one-way gear, the top end of the support block is fixedly connected with an extension block, the side of the guide rod away from the one-way gear is rotatably connected with one side of the extension block, one end of the first connecting pipe is connected with the fixed sleeve, the top slider of the support block is connected with a movable sleeve, one side of the movable sleeve is fixedly connected with a threaded slider, one end of the guide rod is provided with a reciprocating thread, the threaded slider is threadedly connected to the reciprocating thread on the guide rod, and the end of the connecting shaft away from the motor is fixedly connected with a cleaning brush.

[0008] Preferably, a filter element is threadedly connected to the inner wall of the movable sleeve, a telescopic rod is fixedly connected to one end of the movable sleeve, and one end of the telescopic rod is connected to the second connecting pipe.

[0009] Preferably, a water inlet pipe is fixedly connected to the bottom end of the wastewater collection tank.

[0010] Preferably, the top end of the oil-fired boiler is connected to an air outlet pipe.

[0011] Preferably, a bracket is fixedly connected to the bottom end of the wastewater collection tank.

[0012] Preferably, the motor is a reduction motor.

[0013] The present invention also provides the following technical solution: a method for recovering and treating methane in a sewage system, comprising the following steps:

[0014] 1) Through the purification and desulfurization of the biogas generated during the anaerobic treatment of sewage, a mixed gas with methane and carbon dioxide as the main components is obtained, and then the mixed gas is pressurized and liquefied for easy storage and transportation; the liquefied mixed gas is then introduced into the boiler for heating, and methane vapor is obtained based on the characteristics of carbon dioxide being soluble in water and methane being insoluble in water, which can be reused after being collected and stored. This system avoids the pollution to the environment during the combustion and emptying of biogas, and at the same time, improves the utilization rate of resources and turns waste into treasure.

[0015] 2) When inputting wastewater, the starting motor drives the connecting shaft to rotate, and the cleaning brush at one end of the connecting shaft is used to scrape the surface of the filter element to prevent the filter element surface from being blocked and slow down the flow rate of wastewater. At the same time, the driving gear drives the one-way gear to rotate. At this time, the one-way gear forms an idle rotation and does not drive the guide rod to rotate.

[0016] 3) When replacing the filter element, only need to start the motor in reverse to drive the driving gear to rotate. Then, through the single-direction gear transmission, the guide rod rotates. Through the cooperation of the reciprocating thread at one end of the guide rod and the threaded slider, the moving sleeve is driven to move, so that the fixed sleeve and the moving sleeve move away from each other. At this time, only need to rotate the filter element to remove it.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] By purifying and desulfurizing the biogas generated during the anaerobic treatment of sewage, a mixed gas mainly composed of methane and carbon dioxide is obtained. Then, the mixed gas is pressurized and liquefied for convenient storage and transportation. Then, the liquefied mixed gas is introduced into the boiler for heating. According to the characteristics that carbon dioxide is easily soluble in water and methane is insoluble in water, methane steam is obtained. After collection and storage, it can be reused. This system avoids environmental pollution caused during the combustion and exhaustion of biogas. At the same time, it improves the resource utilization rate and turns waste into treasure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall partial cross-sectional structure of the present invention;

[0020] Figure 2 It is one of the schematic diagrams of the wastewater collection tank structure of the present invention;

[0021] Figure 3 It is the second schematic diagram of the wastewater collection tank structure of the present invention.

[0022] In the figure: 1. Wastewater collection tank; 2. Anaerobic tank; 3. Water seal tank; 4. Motor; 5. First connecting pipe; 6. Support block; 7. Second connecting pipe; 9. Gas-liquid separator; 10. Desulfurization pump; 11. Low-pressure storage tank; 12. Booster pump; 13. High-pressure storage tank; 15. Fuel boiler; 16. Clogging removal device; 17. Filter element; 18. Telescopic rod; 19. Water inlet pipe; 20. Gas outlet pipe; 21. Bracket; 161. Fixed sleeve; 162. Connecting shaft; 163. Driving gear; 164. Guide rod; 165. Single-direction gear; 166. Extension block; 167. Moving sleeve; 168. Threaded slider; 169. Thread; 1610. Cleaning brush. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1 - 3As shown in the figure, a methane recovery and treatment device for a sewage system includes a wastewater collection tank 1, an anaerobic tank 2, and a water seal tank 3. A motor 4 is fixedly connected to the top end of the wastewater collection tank 1. A first connecting pipe 5 is connected to the outer wall of the wastewater collection tank 1. The anaerobic tank 2 is connected to one side of the wastewater collection tank 1. A support block 6 is fixedly connected to the top end of the anaerobic tank 1. A second connecting pipe 7 is connected to the top end of the anaerobic tank 2. The first connecting pipe 5 and the second connecting pipe 7 are cooperatively installed. The water seal tank 3 is connected to one side of the anaerobic tank 2. A gas-liquid separator 9 is connected to one side of the water seal tank 3. A desulfurization pump 10 is fixedly connected to one side of the gas-liquid separator 9. A low-pressure storage tank 11 is connected to one side of the desulfurization pump 10. A booster pump 12 is connected to one side of the low-pressure storage tank 11. A high-pressure storage tank 13 is connected to one side of the booster pump 12. A fuel boiler 15 is connected to one side of the high-pressure storage tank 13. A clogging removal device 16 is provided at the top end of the wastewater collection tank 1. A water inlet pipe 19 is fixedly connected to the bottom end of the wastewater collection tank 1. An air outlet pipe 20 is connected to the top end of the fuel boiler 15. A support 21 is fixedly connected to the bottom end of the wastewater collection tank 1. The motor 4 is a reduction motor.

[0025] Please refer to Figures 2 - 3 As shown in the figure, the clogging removal device 16 includes a fixed sleeve 161, a connecting shaft 162, and a driving gear 163. A fixed sleeve 161 is fixedly connected to the top end of the support block 6. The middle part of the inner wall of the fixed sleeve 161 is rotationally connected to a connecting shaft 162. The output end of the motor 4 extends into the fixed sleeve 161 and is fixedly connected to the connecting shaft 162. The output end of the motor 4 is fixedly connected to a driving gear 163. A guide rod 164 is rotationally connected to one side of the fixed sleeve 161. A one-way gear 165 is fixedly connected to one end of the guide rod 164. The driving gear 163 is meshed with the one-way gear 165. An extension block 166 is fixedly connected to the top end of the support block 6. The side of the guide rod 164 away from the one-way gear 165 is rotationally connected to the side of the extension block 166. One end of the first connecting pipe 5 is connected to the fixed sleeve 161. A moving sleeve 167 is slidably connected to the top end of the support block 6. A threaded slider 168 is fixedly connected to one side of the moving sleeve 167. A reciprocating thread 169 is provided at one end of the guide rod 164. The threaded slider 168 is threadedly connected to the reciprocating thread 169 on the guide rod 164. A cleaning brush 1610 is fixedly connected to the end of the connecting shaft 162 away from the motor 4.

[0026] Please refer to Figures 1 - 3 As shown in the figure, a filter element 17 is threadedly connected to the inner wall of the moving sleeve 167. A telescopic rod 18 is fixedly connected to one end of the moving sleeve 167. One end of the telescopic rod 18 is connected to the second connecting pipe 7.

[0027] Please refer to Figures 2 - 3As shown, a method for recovering and treating methane in a sewage system includes the following steps:

[0028] 1), Purify and desulfurize the biogas generated during the anaerobic treatment of sewage to obtain a mixed gas mainly composed of methane and carbon dioxide, and then perform pressurized liquefaction treatment on the mixed gas to facilitate storage and transportation; then introduce the liquefied mixed gas into a boiler for heating. According to the characteristics that carbon dioxide is easily soluble in water and methane is insoluble in water, methane steam is obtained, which can be reused after collection and storage. This system avoids environmental pollution during the combustion and evacuation of biogas. At the same time, it improves the resource utilization rate and turns waste into treasure.

[0029] 2), When inputting wastewater, start the motor 4 to drive the connecting shaft 162 to rotate. The cleaning brush 1610 at one end of the connecting shaft 162 scrapes the surface of the filter element 17 to prevent the surface of the filter element 17 from being blocked and delay the flow rate of wastewater. At the same time, the driving gear 163 drives the one-way gear 165 to rotate. At this time, the one-way gear 165 idles and does not drive the guide rod 164 to rotate.

[0030] 3), When replacing the filter element 17, only need to reverse-start the motor 4 to drive the driving gear 163 to rotate, and drive the guide rod 164 to rotate through the transmission of the one-way gear 165. Through the cooperation of the reciprocating thread 169 at one end of the guide rod 164 and the thread slider 168, the moving sleeve 167 is driven to move, so that the fixed sleeve 161 and the moving sleeve 167 move away. At this time, only need to rotate the filter element 17 to remove the filter element 17.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A methane recovery and treatment device for a sewage system, comprising: a wastewater collection tank (1), an anaerobic tank (2) and a water seal tank (3). A motor (4) is fixedly connected to the top end of the wastewater collection tank (1). A first connecting pipe (5) is connected to the outer wall of the wastewater collection tank (1). One side of the wastewater collection tank (1) is connected to the anaerobic tank (2). A support block (6) is fixedly connected to the top end of the anaerobic tank (1). It is characterized in that: a second connecting pipe (7) is connected to the top end of the anaerobic tank (2). The first connecting pipe (5) and the second connecting pipe (7) are cooperatively installed. One side of the anaerobic tank (2) is connected to the water seal tank (8). One side of the water seal tank (8) is connected to a gas-liquid separator (9). A desulfurization pump (10) is fixedly connected to one side of the gas-liquid separator (9). One side of the desulfurization pump (10) is connected to a low-pressure storage tank (11). One side of the low-pressure storage tank (11) is connected to a booster pump (12). One side of the booster pump (12) is connected to a high-pressure storage tank (13). One side of the high-pressure storage tank (13) is connected to a purifier (14). One side of the purifier (14) is connected to a fuel boiler (15). A clogging removal device (16) is provided at the top end of the wastewater collection tank (1).

2. The methane recovery and treatment device for a sewage system according to claim 1, characterized in that: the clogging removal device (16) includes: a fixed sleeve (161), a connecting shaft (162) and a driving gear (163). A fixed sleeve (161) is fixedly connected to the top end of the support block (6). The middle part of the inner wall of the fixed sleeve (161) is rotatably connected to a connecting shaft (162). The output end of the motor (4) extends into the fixed sleeve (161) and is fixedly connected to the connecting shaft (162). The output end of the motor (4) is fixedly connected to a driving gear (163). One side of the fixed sleeve (161) is rotatably connected to a guide rod (164). One end of the guide rod (164) is fixedly connected to a one-way gear (165). The driving gear (163) is meshed with the one-way gear (165). An extension block (166) is fixedly connected to the top end of the support block (6). The side of the guide rod (164) away from the one-way gear (165) is rotatably connected to the side of the extension block (166). One end of the first connecting pipe (5) is connected to the fixed sleeve (161). A movable sleeve (167) is slidably connected to the top end of the support block (6). A threaded slider (168) is fixedly connected to one side of the movable sleeve (167). A reciprocating thread (169) is provided at one end of the guide rod (164). The threaded slider (168) is threadedly connected to the reciprocating thread (169) on the guide rod (164). The end of the connecting shaft (162) away from the motor (4) is fixedly connected to a cleaning brush (1610).

3. The methane recovery and treatment device for a sewage system according to claim 2, characterized in that: The inner wall of the movable sleeve (167) is threadedly connected with a filter element (17). One end of the movable sleeve (167) is fixedly connected with a telescopic rod (18), and one end of the telescopic rod (18) is connected to the second connecting pipe (7).

4. A methane recovery and treatment device for a sewage system according to claim 1, characterized in that: The bottom end of the wastewater collection tank (1) is fixedly connected with a water inlet pipe (19).

5. A methane recovery and treatment device for a sewage system according to claim 1, characterized in that: The top end of the fuel boiler (15) is connected with an air outlet pipe (20).

6. A methane recovery and treatment device for a sewage system according to claim 1, characterized in that: The bottom end of the wastewater collection tank (1) is fixedly connected with a bracket (21).

7. A methane recovery and treatment device for a sewage system according to claim 1, characterized in that: The motor (4) is a reduction motor.

8. A method for recovering and treating methane in a sewage system, characterized in that it includes the following steps: 1), By purifying and desulfurizing the biogas generated during the anaerobic treatment of sewage, a mixed gas mainly composed of methane and carbon dioxide is obtained, and then the mixed gas is pressurized and liquefied for convenient storage and transportation; then the liquefied mixed gas is introduced into a boiler for heating. According to the characteristics that carbon dioxide is easily soluble in water and methane is insoluble in water, methane steam is obtained, and after collection and storage, it can be reused. This system avoids environmental pollution caused by the combustion and exhaustion of biogas, and at the same time, improves the resource utilization rate and turns waste into treasure. 2), When inputting wastewater, start the motor (4) to drive the connecting shaft (162) to rotate, and use the cleaning brush (1610) at one end of the connecting shaft (162) to scrape the surface of the filter element (17), thereby preventing the surface of the filter element (17) from being blocked and delaying the wastewater flow rate. At the same time, the driving gear (163) drives the one-way gear (165) to rotate. At this time, the one-way gear (165) idles and does not drive the guide rod (164) to rotate. 3), When replacing the filter element (17), only need to reverse-start the motor (4) to drive the driving gear (163) to rotate, and transmit it to the guide rod (164) through the one-way gear (165) to rotate. Through the cooperation of the reciprocating thread (169) at one end of the guide rod (164) and the thread slider (168), the movable sleeve (167) is driven to move, so that the fixed sleeve (161) and the movable sleeve (167) move away. At this time, only need to rotate the filter element (17) to remove the filter element (17).

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