Anaerobic compost gas treatment system

Abstract

The utility model discloses an anaerobic composting gas treatment system, which relates to the technical field of composting waste gas treatment and comprises a gas inlet pipe, an ammonia gas absorption treatment device, a communicating pipe, a hydrogen sulfide absorption treatment device and a gas outlet pipe which are communicated in sequence, the ammonia gas absorption treatment device is used for absorbing ammonia gas in the anaerobic composting gas, and the hydrogen sulfide absorption treatment device is used for absorbing hydrogen sulfide in the anaerobic composting gas; the gas inlet pipe and the communicating pipe are each provided with a gas flow adjusting device, and the gas flow adjusting devices are used for detecting and adjusting gas flow and flow velocity. Gas concentration detection devices are arranged on the gas inlet pipe, the communicating pipe and the gas outlet pipe and are used for detecting gas components and concentration. According to the anaerobic composting gas treatment device, ammonia gas and hydrogen sulfide in anaerobic composting gas can be absorbed, environmental pollution is reduced, relatively pure methane gas is obtained, and follow-up reutilization is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of compost waste gas treatment, in particular to an anaerobic composting gas treatment system. Background Art

[0002] If not effectively treated, various agricultural wastes, sludge, and manure can cause serious environmental pollution. Anaerobic composting is the process of decomposing and transforming organic matter using anaerobic microorganisms under oxygen-free conditions. These processes, such as biochemical reactions involving organic acids, convert organic matter into methane, carbon dioxide, and a number of low-molecular-weight intermediates. Therefore, using anaerobic composting to transform large amounts of organic waste into useful products not only reduces environmental risks but also creates valuable compost products such as soil conditioners and organic fertilizers.

[0003] However, the anaerobic composting process produces various odorous substances, and the resulting odor pollution has become a major obstacle to the development of composting technology. The harmless treatment and resource utilization of various toxic and harmful gases produced during anaerobic composting are also important aspects of sustainable agricultural development. Ammonia and hydrogen sulfide are the main odorous substances produced during anaerobic composting. Ammonia mainly comes from the degradation of organic matter during anaerobic composting, while hydrogen sulfide is a product of the incomplete decomposition of organic matter by anaerobic bacteria under anoxic conditions.

[0004] It can be seen that in order to increase the proportion of useful gases such as methane produced by anaerobic composting, how to reduce the escape of odor (ammonia and hydrogen sulfide) produced during the anaerobic composting process is a problem that needs to be solved urgently. Utility Model Content

[0005] The purpose of the utility model is to provide an anaerobic composting gas treatment system to solve the problems existing in the above-mentioned related technologies. It can absorb and treat ammonia and hydrogen sulfide in anaerobic composting gas, reduce environmental pollution, and obtain relatively pure methane gas, which is conducive to subsequent reuse.

[0006] To achieve the above purpose, the present invention provides the following solutions:

[0007] The utility model provides an anaerobic composting gas treatment system, comprising an air inlet pipe, an ammonia absorption treatment device, a connecting pipe, a hydrogen sulfide absorption treatment device and an air outlet pipe which are connected in sequence, wherein the inlet of the air inlet pipe is used for introducing anaerobic composting gas, the ammonia absorption treatment device is used for absorbing ammonia in the anaerobic composting gas, the hydrogen sulfide absorption treatment device is used for absorbing hydrogen sulfide in the anaerobic composting gas, and the outlet of the air outlet pipe is used for passing the treated anaerobic composting gas; the air inlet pipe and the connecting pipe are both provided with a gas flow regulating device, and the gas flow regulating device is used for detecting and regulating gas flow and flow velocity; the air inlet pipe, the connecting pipe and the air outlet pipe are all provided with a gas concentration detecting device, and the gas concentration detecting device is used for detecting gas components and concentration.

[0008] Preferably, the ammonia absorption treatment device is a dilute sulfuric acid absorption tower.

[0009] Preferably, an air inlet is provided at the bottom of the dilute sulfuric acid absorption tower, and an air outlet is provided at the top of the dilute sulfuric acid absorption tower, so that the anaerobic composting gas entering the dilute sulfuric acid absorption tower through the air inlet pipe can flow through the dilute sulfuric acid absorption tower from bottom to top.

[0010] Preferably, the hydrogen sulfide absorption treatment device is a diethanolamine absorption tower.

[0011] Preferably, an air inlet is provided at the bottom of the diethanolamine absorption tower, and an air outlet is provided at the top of the diethanolamine absorption tower, so that the anaerobic composting gas entering the diethanolamine absorption tower through the connecting pipe can flow through the diethanolamine absorption tower from bottom to top.

[0012] Preferably, the gas flow regulating device is a pneumatic flow regulating valve.

[0013] Preferably, the gas concentration detection device is a gas detector.

[0014] Preferably, the gas detector on the air intake pipe is located behind the pneumatic flow regulating valve on the air intake pipe.

[0015] Preferably, the gas detector on the connecting pipe is located behind the pneumatic flow regulating valve on the connecting pipe.

[0016] Preferably, the anaerobic composting gas treatment system further includes a controller, and each of the gas flow regulating devices and each of the gas concentration detecting devices are electrically connected to the controller.

[0017] Compared with the related art, the utility model has achieved the following technical effects:

[0018] The anaerobic composting gas treatment system provided by the utility model comprises an air inlet pipe, an ammonia absorption treatment device, a connecting pipe, a hydrogen sulfide absorption treatment device and an air outlet pipe which are connected in sequence. When in use, the anaerobic composting gas is introduced into the system through the air inlet pipe, and the flow rate and flow velocity of the anaerobic composting gas can be detected and adjusted by the gas flow regulating device on the air inlet pipe. The components and concentration of the anaerobic composting gas can be detected by the gas concentration detecting device on the air inlet pipe, so as to facilitate the regulation of the ammonia absorption process parameters to improve the ammonia removal rate. Then, the anaerobic composting gas enters the ammonia absorption treatment device through the air inlet pipe for ammonia absorption. The anaerobic composting gas after ammonia removal enters the connecting pipe. The flow rate and flow velocity of the anaerobic composting gas after ammonia removal can be detected and adjusted by the gas flow regulating device on the connecting pipe. The gas concentration detection device on the through pipe can detect the components and concentration of the anaerobic composting gas after the ammonia is removed, which is convenient for regulating the parameters of the hydrogen sulfide absorption process to improve the hydrogen sulfide removal rate. Then, the anaerobic composting gas after the ammonia is removed enters the hydrogen sulfide absorption treatment device through the connecting pipe for hydrogen sulfide absorption. The anaerobic composting gas after the hydrogen sulfide is removed enters the outlet pipe. The gas concentration detection device on the outlet pipe can detect the components and concentration of the anaerobic composting gas after the hydrogen sulfide is removed. If the concentrations of ammonia and hydrogen sulfide are lower than the standard threshold, they can be discharged. If they are higher than the standard threshold, they need to be treated again until they meet the standard before being discharged. This system realizes the absorption and treatment of ammonia and hydrogen sulfide in anaerobic composting gas, reduces environmental pollution, and obtains relatively pure methane gas, which is conducive to subsequent reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of an anaerobic composting gas treatment system provided by an embodiment of the present utility model;

[0021] Figure 2 A schematic diagram of a gas flow regulating device provided in an embodiment of the present utility model;

[0022] Figure 3 A schematic diagram of a gas concentration detection device provided in an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the workflow of the anaerobic composting gas treatment system provided by an embodiment of the present utility model.

[0024] In the figure: 1-inlet pipe, 2-ammonia absorption and treatment device, 3-connecting pipe, 4-hydrogen sulfide absorption and treatment device, 5-outlet pipe, 6-gas flow control device, 7-gas concentration detection device, 8-computer, 9-integrated circuit. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The purpose of the utility model is to provide an anaerobic composting gas treatment system to solve the problems existing in the relevant technologies. It can absorb and treat ammonia and hydrogen sulfide in anaerobic composting gas to reduce environmental pollution, and obtain relatively pure methane gas, which is conducive to subsequent reuse.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] like Figure 1 As shown, this embodiment provides an anaerobic composting gas treatment system, including an air inlet pipe 1, an ammonia absorption treatment device 2, a connecting pipe 3, a hydrogen sulfide absorption treatment device 4 and an air outlet pipe 5 connected in sequence. The inlet of the air inlet pipe 1 is used to pass anaerobic composting gas, the ammonia absorption treatment device 2 is used to absorb ammonia in the anaerobic composting gas, the hydrogen sulfide absorption treatment device 4 is used to absorb hydrogen sulfide in the anaerobic composting gas, and the outlet of the air outlet pipe 5 is used to pass the treated anaerobic composting gas; the air inlet pipe 1 and the connecting pipe 3 are both provided with a gas flow regulating device 6, and the gas flow regulating device 6 is used to detect and regulate the gas flow and flow rate; the air inlet pipe 1, the connecting pipe 3 and the air outlet pipe 5 are all provided with a gas concentration detection device 7, and the gas concentration detection device 7 is used to detect the gas component and concentration; specifically, as shown in FIG. Figure 2 As shown, the gas flow regulating device 6 in this embodiment is a pneumatic flow regulating valve. Figure 3 As shown, the gas concentration detection device 7 in this embodiment is a gas detector. The gas detector on the intake pipe 1 is located behind the pneumatic flow regulating valve on the intake pipe 1, and the gas detector on the connecting pipe 3 is located behind the pneumatic flow regulating valve on the connecting pipe 3.

[0029] Furthermore, the system also includes a controller, and each gas flow regulating device 6 and each gas concentration detection device 7 are electrically connected to the controller. The gas flow, flow rate, component and concentration information obtained by each gas flow regulating device 6 and each gas concentration detection device 7 are transmitted to the controller. The controller can monitor the entire gas treatment process online and prompt abnormal situations, which is also convenient for operators to adjust the gas flow and flow rate according to the gas processing volume and equipment status of the day; specifically, the controller in this embodiment is mainly composed of a computer 8, an integrated circuit board 9 and related circuits, and the circuits connect the computer 8, the integrated circuit board 9, each gas flow regulating device 6 and each gas concentration detection device 7.

[0030] In this embodiment, the ammonia absorption treatment device 2 is a dilute sulfuric acid absorption tower, which absorbs ammonia in the anaerobic composting gas through the dilute sulfuric acid absorption liquid in the dilute sulfuric acid absorption tower. The liquid after absorbing ammonia is subsequently concentrated and crystallized to obtain ammonium sulfate crystals for recycling.

[0031] Furthermore, an air inlet is provided at the bottom of the dilute sulfuric acid absorption tower, and an air outlet is provided at the top of the dilute sulfuric acid absorption tower, so that the anaerobic composting gas entering the dilute sulfuric acid absorption tower through the air inlet pipe 1 can flow through the dilute sulfuric acid absorption tower from bottom to top, thereby enhancing the absorption effect.

[0032] In this embodiment, the hydrogen sulfide absorption and treatment device 4 is a diethanolamine absorption tower, which absorbs hydrogen sulfide in the anaerobic composting gas through the diethanolamine absorption liquid in the diethanolamine absorption tower. The liquid rich in hydrogen sulfide after absorption is subsequently desorbed to obtain high-concentration hydrogen sulfide, which is then recycled.

[0033] Furthermore, an air inlet is provided at the bottom of the diethanolamine absorption tower, and an air outlet is provided at the top of the diethanolamine absorption tower, so that the anaerobic composting gas entering the diethanolamine absorption tower through the connecting pipe 3 can flow through the diethanolamine absorption tower from bottom to top, thereby enhancing the absorption effect.

[0034] It should be noted that the dilute sulfuric acid absorption tower and the diethanolamine absorption tower in this embodiment are both conventional absorption towers, and their specific structures are not particularly limited, as long as they can achieve the above functions.

[0035] like Figure 4 As shown, the working process of the anaerobic composting gas treatment system provided in this embodiment is as follows:

[0036] The anaerobic composting gas is introduced into the system through the air inlet pipe 1, and the gas flow rate and flow rate information are obtained through the gas flow regulating device 6 on the air inlet pipe 1 and transmitted to the controller. The operator adjusts the gas flow rate and flow rate according to the equipment processing situation on that day; the regulated gas passes through the gas concentration detection device 7 on the air inlet pipe 1, and the gas composition and concentration information are obtained and transmitted to the controller, and the overall status of the system is monitored by the controller; the gas after obtaining the information is introduced into the ammonia absorption treatment device 2, and the ammonia absorption process parameters are adjusted by the controller to improve the ammonia removal rate, so that the ammonia in the anaerobic composting gas is removed; the gas after ammonia removal is adjusted in flow rate and flow rate by the gas flow regulating device 6 on the connecting pipe 3, and then The gas concentration detection device 7 on the connecting pipe 3 obtains the gas composition and concentration and transmits them to the controller. If the ammonia concentration meets the standard, it is passed to the next gas treatment device. If the ammonia concentration is higher than the minimum concentration threshold, the controller alarm prompts the operator to check and repair the equipment; the regulated gas is passed into the hydrogen sulfide absorption treatment device 4, and the controller adjusts the hydrogen sulfide absorption process parameters to improve the hydrogen sulfide removal rate, so that the hydrogen sulfide in the anaerobic composting gas is removed; the gas after hydrogen sulfide removal passes through the gas concentration detection device 7 on the outlet pipe 5, obtains the gas composition and concentration and transmits it to the controller. If the ammonia and hydrogen sulfide concentrations are lower than the standard threshold, they can be discharged. If they are higher than the standard threshold, they need to be processed again until they meet the standard before being discharged.

[0037] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An anaerobic composting gas treatment system, characterized by: The apparatus comprises an air inlet pipe, an ammonia absorption treatment device, a connecting pipe, a hydrogen sulfide absorption treatment device and an air outlet pipe which are connected in sequence. The inlet of the air inlet pipe is used to introduce anaerobic composting gas. The ammonia absorption treatment device is used to absorb ammonia in the anaerobic composting gas. The hydrogen sulfide absorption treatment device is used to absorb hydrogen sulfide in the anaerobic composting gas. The outlet of the air outlet pipe is used to pass the treated anaerobic composting gas. The air inlet pipe and the connecting pipe are both provided with a gas flow regulating device, which is used to detect and regulate the gas flow and flow rate. The air inlet pipe, the connecting pipe and the air outlet pipe are all provided with a gas concentration detecting device, which is used to detect the gas components and concentration.

2. The anaerobic composting gas treatment system according to claim 1, characterized in that: The ammonia absorption treatment device is a dilute sulfuric acid absorption tower.

3. The anaerobic composting gas treatment system according to claim 2, characterized in that: The bottom of the dilute sulfuric acid absorption tower is provided with an air inlet, and the top of the dilute sulfuric acid absorption tower is provided with an air outlet, so that the anaerobic composting gas entering the dilute sulfuric acid absorption tower through the air inlet pipe can flow through the dilute sulfuric acid absorption tower from bottom to top.

4. The anaerobic composting gas treatment system according to claim 1, characterized in that: The hydrogen sulfide absorption and treatment device is a diethanolamine absorption tower.

5. The anaerobic composting gas treatment system according to claim 4, characterized in that: An air inlet is provided at the bottom of the diethanolamine absorption tower, and an air outlet is provided at the top of the diethanolamine absorption tower, so that the anaerobic composting gas entering the diethanolamine absorption tower through the connecting pipe can flow through the diethanolamine absorption tower from bottom to top.

6. The anaerobic composting gas treatment system according to claim 1, characterized in that: The gas flow regulating device is a pneumatic flow regulating valve.

7. The anaerobic composting gas treatment system according to claim 6, characterized in that: The gas concentration detection device is a gas detector.

8. The anaerobic composting gas treatment system according to claim 7, characterized in that: The gas detector on the air intake pipe is located behind the pneumatic flow regulating valve on the air intake pipe.

9. The anaerobic composting gas treatment system according to claim 7, characterized in that: The gas detector on the connecting pipe is located behind the pneumatic flow regulating valve on the connecting pipe.

10. The anaerobic composting gas treatment system according to any one of claims 1 to 9, characterized in that: The anaerobic composting gas treatment system further includes a controller, and each of the gas flow regulating devices and each of the gas concentration detecting devices are electrically connected to the controller.

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