Biogas residue treatment system
By granulating, drying, and gasifying pyrolysis to treat biogas residue, a circular loop is formed to utilize heat, solving the problems of poor permeability and pollution of biogas residue, realizing the harmless and resource-based utilization of biogas residue, and reducing the risk of environmental pollution.
Patent Information
- Application Number
- CN202423312957.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The fine structure of biogas residue results in poor permeability, which affects the rate of mycelial growth. Furthermore, the drying process pollutes the air and soil, making it unusable and posing a risk of secondary environmental pollution.
The biogas residue is extruded into granules using a granulation device, dried by a drying device, and then pyrolyzed and gasified in a gasification and pyrolysis device to generate combustible gas and generate electricity. A circulating loop is formed using a flue gas heat exchanger and a waste heat recovery device to make full use of the heat. The gasified slag is used for the manufacture of inorganic fertilizer.
This method achieves the harmless disposal and resource utilization of biogas residue, avoids secondary environmental pollution, improves energy utilization efficiency, and reduces drying costs.
Smart Images
Figure CN223646511U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy conservation and environmental protection technology, and in particular to a biogas residue treatment system. Background Technology
[0002] Biogas residue, especially that from livestock manure fermentation, is often very fine, resembling powder. Without proper formulation, this results in poor permeability of the substrate, hindering microbial growth and increasing contamination rates, thus preventing effective utilization. Furthermore, the drying process of biogas residue is problematic, particularly since manure-based biogas residue often emits a foul odor, polluting both the air and soil. Therefore, there is an urgent need to design a biogas residue treatment system that can harmlessly dispose of biogas residue, achieving resource utilization while effectively preventing secondary environmental pollution. Utility Model Content
[0003] The purpose of this invention is to propose a biogas residue treatment system that can achieve resource utilization through harmless disposal of biogas residue while effectively protecting against secondary pollution of the environment caused by biogas residue.
[0004] To achieve this objective, the present invention adopts the following technical solution:
[0005] This utility model provides a biogas residue treatment system, including:
[0006] The granulation device is used to extrude biogas residue into biogas residue granules and spread them evenly in the drying device. The drying device is used to dry the biogas residue granules to form dried biogas residue granules.
[0007] A gasification pyrolysis device is used to pyrolyze and gasify the dried biogas residue particles to generate combustible gas and collect the gasified slag.
[0008] The biogas generator set has its air inlet connected to the gasification and pyrolysis device, and its air outlet connected to the drying device via a flue gas heat exchanger. The gasification and pyrolysis device, the biogas generator set, the flue gas heat exchanger, and the drying device are connected end-to-end through pipelines to form a gas circulation loop. The combustible gas generated by the gasification and pyrolysis device is introduced into the biogas generator set to generate high-temperature flue gas. The hot air generated by the high-temperature flue gas after heat exchange in the flue gas heat exchanger is introduced into the drying device to dry the biogas residue particles. The hot air after drying the biogas residue particles flows back to the flue gas heat exchanger through the circulation loop.
[0009] The waste heat recovery device has its inlet connected to the drying device and its outlet connected to the gas circulation loop, so that the heat recovered by the waste heat recovery device heats the incoming fresh air and then introduces it into the circulation loop.
[0010] The biogas residue treatment system comprises a gasification and pyrolysis unit, a biogas generator set, a flue gas heat exchanger, and a drying unit, all connected end-to-end via pipelines to form a gas circulation loop. The combustible gas generated by the gasification and pyrolysis unit is introduced into the biogas generator set to produce high-temperature flue gas. This high-temperature flue gas is then heated by the flue gas heat exchanger, and the resulting hot air is introduced into the drying unit to dry the biogas residue particles. The dried hot air then flows back to the flue gas heat exchanger through the circulation loop. Heat recovered by the waste heat recovery device heats the incoming fresh air before it is introduced into the circulation loop to fully utilize the heat. The gasification and pyrolysis unit collects the gasified slag. This biogas residue treatment system can fully utilize the energy from the biogas residue; the gasified slag can be used as a raw material for inorganic fertilizer production, truly realizing the comprehensive resource utilization of biogas residue and effectively avoiding secondary pollution of the environment.
[0011] As a preferred embodiment of the above-mentioned biogas residue treatment system, the gasification pyrolysis device includes a gasification device and a flue gas purification device connected together. The flue gas purification device is connected to the biogas generator set. The gasification device is used to receive the dried biogas residue particles and pyrolyze and gasify the dried biogas residue particles to obtain the combustible gas. The flue gas purification device is used to purify the combustible gas.
[0012] The gasification unit is used to receive dried biogas residue particles and to pyrolyze and gasify the dried biogas residue particles to obtain combustible gas; the purification unit is used to purify the combustible gas.
[0013] As a preferred embodiment of the above-mentioned biogas residue treatment system, a dry material silo is provided between the drying device and the gasification device, and the dry material silo is used to store the dried biogas residue particles.
[0014] A conveying device is provided between the dry material silo and the drying device, and the conveying device is used to transport the dried biogas residue particles in the dry material silo to the gasification device.
[0015] The dry material silo is designed to store the dried biogas residue particles obtained from the drying unit, so that they can be transported to the gasification unit later.
[0016] The installation of a conveying device enables the dried biogas residue particles to be transported into the gasification unit, thereby improving the level of automation.
[0017] As a preferred embodiment of the above-mentioned biogas treatment system, the flue gas purification device includes multi-stage purification components, which are connected in sequence.
[0018] The flue gas purification treatment device includes multi-stage purification components, which can perform multi-stage washing on the pyrolysis and gasification combustible gas, effectively removing dust and desulfurizing the combustible gas, and purifying the combustible gas.
[0019] As a preferred embodiment of the above-mentioned biogas residue treatment system, the gasification device is connected to a slag remover, which is used to collect furnace slag.
[0020] The slag remover is designed to collect slag for use as a raw material in the manufacture of inorganic fertilizers.
[0021] As a preferred embodiment of the above-mentioned biogas residue treatment system, a dehumidifier is provided between the waste heat recovery device and the drying device. The dehumidifier is used to dehumidify the hot air after the biogas residue particles are dried and then introduce it into the waste heat recovery device.
[0022] The dehumidifier is installed to dehumidify the hot air after the biogas residue particles have been dried, so that it can be recirculated into the circulation loop for reuse.
[0023] As a preferred embodiment of the above-mentioned biogas residue treatment system, the waste heat recovery device is connected to the tail gas treatment device, which is used to treat the tail gas discharged from the waste heat recovery device before discharging it.
[0024] The exhaust gas treatment device is used to treat the exhaust gas discharged from the waste heat recovery device before it is released, so as to prevent the direct discharge of exhaust gas from causing environmental pollution.
[0025] As a preferred embodiment of the above-mentioned biogas residue treatment system, a hot air circulating fan is provided on the circulation loop, and the hot air circulating fan is located on the pipeline between the air outlet of the drying device and the flue gas heat exchanger.
[0026] The hot air circulation fan provides power for the circulation of hot air within the circulation loop.
[0027] As a preferred embodiment of the above-mentioned biogas residue treatment system, the drying device is provided with multiple layers of mesh belts, which are arranged sequentially along the height direction of the drying device, and the mesh belts are used to receive the biogas residue particles.
[0028] The multi-layer mesh belt can increase the drying area of the biogas residue particles and improve the drying efficiency.
[0029] As a preferred embodiment of the above-mentioned biogas residue treatment system, the drying device is provided with five layers of mesh belts arranged sequentially from top to bottom.
[0030] The drying device has five layers of mesh belts arranged from top to bottom. These five layers of mesh belts can make full use of the space inside the drying device and increase the drying area of the biogas residue particles.
[0031] The beneficial effects of this utility model are:
[0032] The biogas residue treatment system proposed in this utility model comprises a gasification pyrolysis device, a biogas generator set, a flue gas heat exchanger, and a drying device, all connected end-to-end by pipelines to form a gas circulation loop. The combustible gas generated by the gasification pyrolysis device is introduced into the biogas generator set to produce high-temperature flue gas. This high-temperature flue gas, after heat exchange in the flue gas heat exchanger, generates hot air which is then introduced into the drying device to dry the biogas residue particles. The dried hot air then flows back to the flue gas heat exchanger through the circulation loop. Heat recovered by the waste heat recovery device heats the incoming fresh air before it is introduced into the circulation loop to fully utilize the heat. The gasification pyrolysis device collects the gasified slag. This biogas residue treatment system can fully utilize the energy from the biogas residue; the gasified slag can be used as a raw material for inorganic fertilizer manufacturing, truly realizing the comprehensive resource utilization of biogas residue and effectively avoiding secondary pollution of the environment by biogas residue. Attached Figure Description
[0033] Figure 1 This is a schematic diagram of the biogas residue treatment system provided by this utility model.
[0034] In the picture:
[0035] 1. Granulation device;
[0036] 2. Drying device;
[0037] 31. Gasification device; 32. Flue gas purification device;
[0038] 4. Biogas generator set; 5. Flue gas heat exchanger; 6. Waste heat recovery device;
[0039] 7. Dry material silo; 8. Conveying device; 9. Slag remover; 10. Dehumidifier; 11. Exhaust gas treatment device; 12. Hot air circulating fan. Detailed Implementation
[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0044] Biogas residue, especially that from livestock manure fermentation, is often very fine, resembling powder. Without proper formulation, this results in poor permeability of the substrate, hindering microbial growth and increasing contamination rates, thus preventing effective utilization. Furthermore, the drying process of biogas residue is problematic, particularly since manure-based biogas residue often emits a foul odor, polluting both the air and soil. Therefore, there is an urgent need to design a biogas residue treatment system that can harmlessly dispose of biogas residue, achieving resource utilization while effectively preventing secondary environmental pollution.
[0045] like Figure 1As shown, this embodiment provides a biogas residue treatment system, including a granulation device 1, a drying device 2, a gasification pyrolysis device, a biogas generator set 4, a flue gas heat exchanger 5, and a waste heat recovery device 6. The granulation device 1 is used to extrude biogas residue into granules and evenly spread them in the drying device 2. The drying device 2 is used to dry the biogas residue granules to form dried biogas residue granules. The gasification pyrolysis device is used to pyrolyze and gasify the dried biogas residue granules to generate combustible gas and collect the gasified slag. The inlet of the biogas generator set 4 is connected to the gasification pyrolysis device, and the outlet of the biogas generator set 4 is connected to the drying device 2 via the flue gas heat exchanger 5. The gasification pyrolysis device, biogas generator set 4, flue gas heat exchanger 5, and drying device 2 are connected end to end by pipelines to form a gas circulation loop. The combustible gas generated by the gasification pyrolysis device is introduced into the biogas generator set 4 to generate high-temperature flue gas. The high-temperature flue gas is heated by the flue gas heat exchanger 5 and the resulting hot air is introduced into the drying device 2 to dry the biogas residue particles. The hot air after drying the biogas residue particles flows back to the flue gas heat exchanger 5 through the circulation loop. The inlet of the waste heat recovery device 6 is connected to the drying device 2, and the outlet of the waste heat recovery device 6 is connected to the gas circulation loop so that the heat recovered by the waste heat recovery device 6 heats the incoming fresh air and then introduces it into the circulation loop.
[0046] This biogas residue treatment system can fully utilize the energy from biogas residue, and the gasified slag can be used as a raw material for inorganic fertilizer manufacturing, truly realizing the comprehensive resource utilization of biogas residue and effectively avoiding secondary pollution of the environment by biogas residue.
[0047] The biogas residue treatment system in this embodiment is used to treat livestock manure biogas residue. In other embodiments, the biogas residue treatment system can also be used to treat other biogas residues, and there are no restrictions on this.
[0048] like Figure 1 As shown, the gasification pyrolysis device includes a gasification device 31 and a flue gas purification device 32 connected to each other. The flue gas purification device 32 is connected to the biogas generator set 4. The gasification device 31 is used to receive dried biogas residue particles and to pyrolyze and gasify the dried biogas residue particles to obtain combustible gas. After the dried biogas residue particles are gasified and pyrolyzed, the residual organic parts in the biogas residue are fully utilized to convert into clean combustible gas for power generation, thus fully recovering the energy of the biogas residue. The flue gas purification device 32 is used to purify the combustible gas.
[0049] Optionally, a dry material silo 7 is provided between the drying unit 2 and the gasification unit 31. The dry material silo 7 is used to store dried biogas residue particles. A conveying device 8 is provided between the dry material silo 7 and the drying unit 2. The conveying device 8 is used to transport the dried biogas residue particles in the dry material silo 7 to the gasification unit 31. The dry material silo 7 allows for the storage of the dried biogas residue particles obtained from the drying unit 2, facilitating their subsequent transport to the gasification unit 31. The conveying device 8 transports the dried biogas residue particles to the gasification unit 31, improving the level of automation.
[0050] Optionally, the flue gas purification device 32 includes a multi-stage purification assembly connected in sequence. This assembly performs multi-stage washing on the pyrolysis-gasified combustible gas, effectively removing dust and desulfurizing it, thus purifying the gas. In this embodiment, the combustible gas undergoes multi-stage alkaline washing within the multi-stage purification assembly.
[0051] Optionally, the gasification unit 31 is connected to a slag remover 9, which is used to collect slag. The slag remover 9 is configured to collect slag for use as raw material in the manufacture of inorganic fertilizer.
[0052] Optionally, a dehumidifier 10 is provided between the waste heat recovery device 6 and the drying device 2. The dehumidifier 10 is used to dehumidify the hot air after drying the biogas residue particles and introduce it into the waste heat recovery device 6 so that it can be continuously introduced into the circulation loop for recycling.
[0053] Optionally, the waste heat recovery device 6 is connected to the exhaust gas treatment device 11, which is used to treat the exhaust gas discharged from the waste heat recovery device 6 before discharging it to prevent direct discharge of exhaust gas from causing environmental pollution.
[0054] Optionally, a hot air circulating fan 12 is provided in the circulation loop, and the hot air circulating fan 12 is installed on the pipeline between the air outlet of the drying device 2 and the flue gas heat exchanger 5. The installation of the hot air circulating fan 12 can provide power for the circulation of hot air in the circulation loop.
[0055] Optionally, the drying device 2 is equipped with multiple mesh belts, which are arranged sequentially along the height of the drying device 2. The mesh belts are used to receive the biogas residue particles. The arrangement of multiple mesh belts can increase the drying area of the biogas residue particles and improve the drying efficiency.
[0056] In this embodiment, five layers of mesh belts are arranged sequentially from top to bottom inside the drying device 2. The five layers of mesh belts can make full use of the space inside the drying device 2 and increase the drying area of the biogas residue particles.
[0057] In this embodiment, biogas residue with a moisture content of 55%-85% is granulated into particles by a granulation device 1 and then evenly spread on a mesh belt in a drying device 2. The mesh belt has 5 layers and is conveyed from top to bottom until it is discharged. The thickness of the biogas residue particles spread on each layer of the mesh belt is controlled between 35mm and 45mm. After drying in the drying device 2, the moisture content is reduced to below 15%. The dried biogas residue is then passed through a gasification device 31 to generate combustible gas. The combustible gas enters a flue gas purification device 32 for multi-stage washing, mainly removing dust and desulfurizing. The cleaned combustible gas enters the biogas generator set 4 to generate electricity. The high-temperature flue gas generated by the biogas generator set 4 is heated to 130°C hot air by a high-temperature heat exchanger. The hot air enters the drying device 2 through pipelines, passes through the mesh belt layer by layer, and dries the biogas residue particles by thermal convection. The high-humidity mixed hot air that absorbs the moisture of the biogas residue is heated by the waste heat recovery device 6. The recovered heat is used to heat the incoming fresh air and then enters the circulation loop. The exhaust gas treatment device 11 treats the exhaust gas discharged from the waste heat recovery device 6 and discharges it in compliance with standards.
[0058] This biogas residue treatment system converts the organic part of biogas residue into combustible gas to power the biogas generator set 4, realizing the energy utilization of biogas residue. At the same time, the harmlessly treated slag can also be used as raw material for inorganic fertilizer, truly realizing the resource utilization of biogas residue. The flue gas is dried at low temperature, which fully recovers the heat of the high-temperature waste flue gas from biogas power generation and effectively reduces the drying cost. The investment is low and the operating cost is low.
[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A biogas residue treatment system, characterized in that, include: Granulation device (1) and drying device (2), wherein the granulation device (1) is used to extrude biogas residue into biogas residue particles and spread them evenly in the drying device (2), and the drying device (2) is used to dry the biogas residue particles to form dried biogas residue particles. A gasification pyrolysis device is used to pyrolyze and gasify the dried biogas residue particles to generate combustible gas and collect the gasified slag. A biogas generator set (4) is provided. The inlet of the biogas generator set (4) is connected to the gasification pyrolysis device. The outlet of the biogas generator set (4) is connected to the drying device (2) via a flue gas heat exchanger (5). The gasification pyrolysis device, the biogas generator set (4), the flue gas heat exchanger (5), and the drying device (2) are connected end to end through pipelines to form a gas circulation loop. The combustible gas generated by the gasification pyrolysis device is introduced into the biogas generator set (4) to generate high-temperature flue gas. The hot air generated by the high-temperature flue gas after heat exchange through the flue gas heat exchanger (5) is introduced into the drying device (2) to dry the biogas residue particles. The hot air after drying the biogas residue particles flows back to the flue gas heat exchanger (5) through the circulation loop. Waste heat recovery device (6), the inlet of the waste heat recovery device (6) is connected to the drying device (2), and the outlet of the waste heat recovery device (6) is connected to the gas circulation loop, so that the heat recovered by the waste heat recovery device (6) heats the fresh air that is added and then introduces it into the circulation loop.
2. The biogas residue treatment system according to claim 1, characterized in that, The gasification pyrolysis device includes a gasification device (31) and a flue gas purification device (32) connected together. The flue gas purification device (32) is connected to the biogas generator set (4). The gasification device (31) is used to receive the dried biogas residue particles and pyrolyze and gasify the dried biogas residue particles to obtain the combustible gas. The flue gas purification device (32) is used to purify the combustible gas.
3. The biogas residue treatment system according to claim 2, characterized in that, A dry material silo (7) is provided between the drying device (2) and the gasification device (31), and the dry material silo (7) is used to store the dried biogas residue particles; A conveying device (8) is provided between the dry material bin (7) and the drying device (2). The conveying device (8) is used to transport the dried biogas residue particles in the dry material bin (7) to the gasification device (31).
4. The biogas residue treatment system according to claim 2, characterized in that, The flue gas purification device (32) includes a multi-stage purification component, and the multi-stage purification component is connected in sequence.
5. The biogas residue treatment system according to claim 2, characterized in that, The gasification device (31) is connected to the slag remover (9), which is used to collect slag.
6. The biogas residue treatment system according to any one of claims 1-5, characterized in that, A dehumidifier (10) is provided between the waste heat recovery device (6) and the drying device (2). The dehumidifier (10) is used to dehumidify the hot air after the biogas residue particles are dried and introduce it into the waste heat recovery device (6).
7. The biogas residue treatment system according to any one of claims 1-5, characterized in that, The waste heat recovery device (6) is connected to the exhaust gas treatment device (11), which is used to treat the exhaust gas discharged from the waste heat recovery device (6) before discharging it.
8. The biogas residue treatment system according to any one of claims 1-5, characterized in that, A hot air circulating fan (12) is provided on the circulation loop. The hot air circulating fan (12) is located on the pipeline between the air outlet of the drying device (2) and the flue gas heat exchanger (5).
9. The biogas residue treatment system according to any one of claims 1-5, characterized in that, The drying device (2) is equipped with multiple mesh belts, which are arranged sequentially along the height of the drying device (2). The mesh belts are used to receive the biogas residue particles.
10. The biogas residue treatment system according to claim 9, characterized in that, The drying device (2) is equipped with five layers of mesh belts arranged from top to bottom.