Method for the energy-efficient reconstruction of a biogas plant

Abstract

The present invention provides a method for energy-saving reconstruction and construction of biogas equipment, which belongs to the field of biogas reconstruction technology, and includes: constructing a buried pipe and connecting the buried pipe to a ground source heat pump. Excavating a foundation pit, fixing a gas collecting tank in the foundation pit, laying heat insulation materials on the bottom and side walls of the foundation pit, and fixing a heat exchange tank on the top of the gas collecting tank. Fixing multiple reaction chambers in the heat exchange tank, and connecting the reaction chambers to the gas collecting tank. Connecting the water outlet end of the buried pipe to the top of the heat exchange tank, and connecting the water inlet end of the buried pipe to the bottom of the heat exchange tank. The underground hot water is circulated in the buried pipe and the heat exchange tank by the ground source heat pump; adding fermentation material into the reaction chamber so that the biogas generated in the reaction chamber is passed into the gas collecting tank. The energy-saving reconstruction and construction method of biogas equipment provided by the present invention improves the efficiency of biogas production, and at the same time, the reaction chamber where biogas is generated and the gas collecting tank are both buried underground, so they do not occupy the usable area of ​​the surface, thereby improving applicability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of biogas reconstruction, and more particularly relates to a method for reconstructing and constructing a biogas device. BACKGROUND

[0002] When the energy application in China tends to be more and more environmentally friendly and renewable, the products and systems of renewable energy application are more and more used in various industries. Biogas is a demonstrative conversion from biomass energy to clean energy. However, the existing traditional biogas station has high cost and low efficiency, and the treatment of fecal pollution is not thorough and rapid. In particular, some biogas stations need to install a heating and insulation device in order to continuously produce biogas under different seasonal and climatic conditions. However, these heating and insulation devices need to use high-quality energy such as coal and electricity, resulting in high operating cost of the biogas station, which is not conducive to the promotion in the cold northern region. At the same time, the biogas station needs many supporting devices and connected pipelines, which makes the biogas station occupy a large ground area, so that the biogas station cannot be built in some remote and narrow areas. SUMMARY

[0003] The present application aims to provide a method for reconstructing and constructing a biogas device, which aims to solve the problems of high operating cost and large ground area occupation of the biogas station.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is to provide a method for reconstructing and constructing a biogas device, comprising:

[0005] Performing construction of a ground buried pipe and connecting the ground buried pipe with a ground source heat pump;

[0006] Excavating a foundation pit, fixing a gas collecting tank in the foundation pit, laying heat insulation material on the bottom and side wall of the foundation pit, and fixing a heat exchange tank on the top of the gas collecting tank;

[0007] Fixing a plurality of reaction chambers in the heat exchange tank and connecting the reaction chambers with the gas collecting tank;

[0008] Connecting the water outlet end of the ground buried pipe with the top of the heat exchange tank and connecting the water inlet end of the ground buried pipe with the bottom of the heat exchange tank;

[0009] Circulating the underground hot water in the ground buried pipe and the heat exchange tank by the ground source heat pump; and adding fermentation material into the reaction chambers to make the biogas generated in the reaction chambers enter the gas collecting tank.

[0010] In one possible implementation, the reaction chamber is provided with a discharge cavity and a reaction cavity, a first barrier net is slidably arranged in the reaction cavity, the bottom of the discharge cavity is connected with the gas collecting tank, a closure cover is detachably connected to the top of the reaction cavity, and the reaction cavity is used to contain fermentation material.

[0011] In a possible implementation, the reaction cavity is provided with a second barrier net, a third barrier net and a fourth barrier net; the first barrier net, the second barrier net, the third barrier net and the fourth barrier net are arranged in sequence; the first barrier net and the second barrier net are used in cooperation to clamp old materials and new materials, and the third barrier net and the fourth barrier net are used in cooperation to clamp new materials and old materials.

[0012] In a possible implementation, one side of the gas collecting tank and the heat exchange tank is provided with an auxiliary tank, and an arc-shaped pipe is in communication between the auxiliary tank and the gas collecting tank; a discharging plate is slidably arranged in the gas collecting tank, the arc-shaped pipe and the auxiliary tank, and the discharging plate is used to push the waste materials in the gas collecting tank to the top of the auxiliary tank.

[0013] In a possible implementation, a guide rail is arranged along the axial direction of the gas collecting tank, the arc-shaped pipe and the auxiliary tank, and the discharging plate is rotationally fitted with the guide rail.

[0014] In a possible implementation, the gas collecting tank is communicated with an air outlet pump, the gas collecting tank is provided with air inlet holes communicated with a plurality of reaction cavities, and a valve is installed on each air inlet hole.

[0015] In a possible implementation, the gas collecting tank is communicated with a burner, the burner is used to heat the buried pipe, the burner is communicated with a tail gas tank, the tail gas tank is used to collect tail gas generated by the combustion of biogas in the burner, and the tail gas tank is used to introduce the tail gas into the gas collecting tank and a plurality of reaction chambers.

[0016] In a possible implementation, a heat insulation top plate is buckled on the heat exchange tank, the bottom surface of the heat insulation top plate is provided with a photovoltaic panel, the heat insulation top plate is hinged to one side of the foundation pit, and the heat insulation top plate is swung upward to make the photovoltaic panel contact sunlight.

[0017] In a possible implementation, the air outlet pump and the burner are arranged between the heat exchange tank and the auxiliary tank; and the heat insulation top plate is used as a support platform.

[0018] In a possible implementation, the fixing of the gas collecting tank in the foundation pit comprises:

[0019] A plurality of anchor rods are drilled at the bottom of the foundation pit, and concrete is poured at the bottom of the foundation pit;

[0020] After the concrete is solidified, the gas collecting tank is fixed.

[0021] The biogas equipment energy-saving reconstruction construction method has the beneficial effects that, compared with the prior art, the biogas equipment energy-saving reconstruction construction method has the ground heat exchanger in communication with the ground source heat pump, the gas collection tank is fixed in the foundation pit, and the heat exchange tank is fixed on the top of the gas collection tank.

[0022] In actual application, the water with low temperature is caused to flow into the ground from the heat exchange tank under the driving of the ground source heat pump, is caused to flow into the heat exchange tank after being heated in the ground, and thus the multiple reaction chambers are heated. The fermentation material is added in the reaction chambers, and the biogas generated by the fermentation material flows into the gas collection tank through the reaction chambers. In the application, the multiple reaction chambers are caused to keep relatively constant temperature by the ground source heat pump, so that the biogas generation efficiency is improved, and the reaction chambers and the gas collection tank in which the biogas is generated are both buried in the ground, so that the use area of the ground surface is not occupied, and the applicability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 The flow chart of the biogas equipment energy-saving reconstruction construction method provided by the embodiments of the present application is shown in the figure.

[0025] Figure 2 The connection schematic diagram of the gas collection tank and the heat exchange tank provided by the embodiments of the present application is shown in the figure.

[0026] Figure 3 The connection schematic diagram of the gas collection tank and the heat exchange tank provided by the embodiments of the present application is shown in the figure. Figure 2 The local enlarged schematic diagram of A in the figure.

[0027] In the figure, 1 is a foundation pit, 2 is a gas collection tank, 3 is an arc-shaped pipe, 4 is an auxiliary tank, 5 is a guide rail, 6 is a discharge plate, 7 is a heat exchange tank, 8 is a reaction chamber, 9 is a ground heat exchanger, 10 is a burner, 11 is an air outlet pump, 12 is a photovoltaic panel, 13 is a heat insulation top plate, 14 is a heat insulation material, 15 is concrete, 16 is an anchor rod, 17 is a first barrier net, 18 is a second barrier net, 19 is a third barrier net, 20 is a fourth barrier net, 21 is a valve, and 22 is a discharge cavity. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application and not to limit the present application.

[0029] Please refer to Figures 1 to 3 , the energy-saving reconstruction and construction method of the biogas equipment provided by the present application will be described. The energy-saving reconstruction and construction method of the biogas equipment comprises:

[0030] The construction of the ground buried pipe 9 is carried out and the ground buried pipe 9 is communicated with the ground source heat pump.

[0031] The foundation pit 1 is excavated, the gas collecting tank 2 is fixed in the foundation pit 1, the heat insulation material 14 is laid at the bottom and the sidewall of the foundation pit 1, and the heat exchange tank 7 is fixed at the top of the gas collecting tank 2.

[0032] A plurality of reaction chambers 8 are fixed in the heat exchange tank 7, and the reaction chambers 8 are communicated with the gas collecting tank 2.

[0033] The water outlet end of the ground buried pipe 9 is communicated with the top of the heat exchange tank 7, and the water inlet end of the ground buried pipe 9 is communicated with the bottom of the heat exchange tank 7.

[0034] The underground hot water is circulated and flowed in the ground buried pipe 9 and the heat exchange tank 7 by the ground source heat pump, and the biogas generated in the reaction chambers 8 is introduced into the gas collecting tank 2 by adding the fermentation material into the reaction chambers 8.

[0035] The energy-saving reconstruction and construction method of the biogas equipment provided by the present application has the beneficial effects that, compared with the prior art, in the energy-saving reconstruction and construction method of the biogas equipment of the present application, the ground buried pipe 9 is communicated with the ground source heat pump, the gas collecting tank 2 is fixed in the foundation pit 1, and the heat exchange tank 7 is fixed at the top of the gas collecting tank 2. A plurality of reaction chambers 8 are fixed in the heat exchange tank 7, the water outlet end of the ground buried pipe 9 is communicated with the top of the heat exchange tank 7, and the water inlet end of the ground buried pipe 9 is communicated with the bottom of the heat exchange tank 7.

[0036] In actual application, the water with lower temperature is flowed from the heat exchange tank 7 to the underground under the driving of the ground source heat pump, and is pumped into the heat exchange tank 7 after being heated in the underground, so as to heat the plurality of reaction chambers 8. The fermentation material is added in the reaction chambers 8, and the biogas generated by the fermentation material is introduced into the gas collecting tank 2 through the reaction chambers 8. In the present application, the plurality of reaction chambers 8 are kept at relatively constant temperature by the ground source heat pump, so as to improve the generation efficiency of the biogas. The reaction chambers 8 and the gas collecting tank 2 in which the biogas is generated are both buried in the underground, so as not to occupy the use area of the ground surface, and the applicability is improved.

[0037] When biogas was just popular, there were more rural population and more fermentation materials for producing biogas, and the waste after fermentation could be used as fertilizer for farmland, so biogas was built in each household. However, with the decrease of rural population, the materials for producing biogas decrease, and the energy supply in rural areas changes, and at present, biogas mostly exists in the form of biogas station. The existing biogas station needs to install biogas tank, gas storage tank, purification tank and material tank and other devices on the ground. Since the volume of these devices is large, and the connection between the devices also needs pipeline, it leads to a large ground area occupied by the whole biogas station. When the external temperature is high, the biogas produced in the biogas tank can meet the needs of daily use, but once the external temperature decreases, the activity of microorganisms in the fermentation material decreases, which leads to a sharp decrease in the amount of biogas produced, and even cannot meet the daily use. In order to ensure the constant temperature of the biogas tank, the existing one will use external heating system to continuously heat the biogas tank, but due to the large volume of the biogas tank in the biogas station, the heat loss is serious, which leads to the need of more energy input by the heating system, and the overall economic benefit is low.

[0038] The present application aims to provide a biogas tank construction and a biogas production method, which greatly reduces the required area, thereby meeting the needs of some areas with less available area, such as remote areas, and can maintain the biogas production rate and ensure the energy supply.

[0039] In some embodiments of the energy-saving reconstruction and construction method of the biogas equipment provided in the present application, please refer to Figure 1 and Figure 2 The reaction chamber 8 is provided with a discharging cavity 22 and a reaction cavity, and the first barrier net 17 is slidably arranged in the reaction cavity; the bottom of the discharging cavity 22 is communicated with the gas collecting tank 2, and the top of the reaction cavity is detachably connected with a closing cover, and the reaction cavity is used for accommodating fermentation materials.

[0040] The top of the reaction chamber 8 is provided with a material hole, and the top of the reaction chamber 8 penetrates the heat exchange tank 7 upwards, so that the material hole can be in contact with the outside, and a closing cover is detachably arranged in the material hole. By detaching the closing cover, fermentation materials can be added to the reaction chamber 8, or the waste after complete fermentation in the reaction chamber 8 can be taken out. In order to avoid heat loss from the top of the heat exchange tank 7, a heat insulation top plate 13 is arranged on the top of the heat exchange tank 7.

[0041] For further illustration, the reaction chamber 8 is vertically provided with a discharging cavity 22 and a reaction cavity. The discharging cavity 22 is located above the gas inlet hole, and the reaction cavity is located on one side of the discharging cavity 22. The bottom of the reaction cavity is blocked, and the top is a closed cover. A first barrier net 17 is arranged between the discharging cavity 22 and the reaction cavity. The fermentation material added into the reaction cavity is first fermented in the reaction cavity. Since the closed cover has been blocked, the biogas generated can only pass through the first barrier net 17 into the gas collecting tank 2. It needs to be particularly pointed out that the gas collecting tank 2 is used to collect biogas on the one hand, and on the other hand, since waste is stored in the gas collecting tank 2, although the waste can generate less biogas, but since it contains more microorganisms, the waste can still generate a certain amount of biogas in the gas collecting tank 2, so that the application of the biogas generating device can maximize the complete reaction of organic matter, thereby improving the utilization rate of materials.

[0042] When the organic matter in the reaction cavity is completely reacted, the first barrier net 17 is extracted through the closed cover, and the organic matter in the reaction cavity will enter the gas collecting tank 2 through the discharging cavity 22 and the gas inlet hole under the action of gravity and the like.

[0043] In some embodiments of the energy-saving reconstruction and construction method of the biogas equipment provided in the application, please refer to Figure 1 and Figure 2 , the second barrier net 18, the third barrier net 19 and the fourth barrier net 20 are slidably arranged in the reaction cavity; the first barrier net 17, the second barrier net 18, the third barrier net 19 and the fourth barrier net 20 are arranged in sequence; the first barrier net 17 and the second barrier net 18 cooperate to clamp old materials and new materials, and the third barrier net 19 and the fourth barrier net 20 cooperate to clamp new materials and old materials.

[0044] If only the first barrier net 17 is arranged, although the fermentation material new material can be added into the reaction cavity through the closed cover, since the microorganism content of the newly added fermentation material is low, if there is no old material added into the new material, due to the low microorganism content, a very long time is needed to ensure that the biogas generation rate reaches the requirement. In order to solve the above problem, the second barrier net 18, the third barrier net 19 and the fourth barrier net 20 are arranged in the reaction cavity in the application. In actual application, first, the old material fermented for a period of time can be clamped between the first barrier net 17 and the second barrier net 18, and the new material can be clamped between the third barrier net 19 and the fourth barrier net 20. After the old material in the first barrier net 17 and the second barrier net 18 is reacted for a period of time, the new material is placed between the third barrier net 19 and the fourth barrier net 20. Then it is added into the reaction cavity through the closed cover. At this time, the second barrier net 18 and the third barrier net 19 are in contact. After the closed cover is closed, the microorganisms in the old material contact with the new material through the second barrier net 18 and the third barrier net 19, thereby accelerating the reproduction speed of the microorganisms in the new material, thereby improving the biogas generation rate.

[0045] When the new material is reacted for a period of time, the closing cover is opened, the first barrier net 17 is pulled out from the closing cover, and the old material is pushed into the gas collecting tank 2 through the gas inlet under the action of gravity and the like after being pulled out, and then the second barrier net 18 is pulled out. At this time, the old material has completely entered the gas collecting tank 2. After the first barrier net 17 and the second barrier net 18 are completely pulled out, new material is added therebetween, and the reaction cavity is inserted from the closing cover. At this time, the first barrier net 17 and the second barrier net 18 are pressed against the fourth barrier net 20, so that the first barrier net 17 and the second barrier net 18 are located on the side of the third barrier net 19 and the fourth barrier net 20 away from the gas outlet cavity. At this time, the microorganisms in the fermentation substance clamped in the third barrier net 19 and the fourth barrier net 20 will enter the new material through the first barrier net 17.

[0046] The conventional biogas station directly mixes a part of the old material with the new material. Since the biogas station adds a large amount of new material at a time, and in order to improve the stirring effect, a stirring tank needs to be separately installed in the biogas station. Since the transfer of the fermentation substance is involved, the pipeline connection is relatively complex, and more importantly, since the stirring tank and the related pipeline exist, a large ground area is undoubtedly occupied, but some remote areas cannot meet the above conditions. In the present application, the old material and the new material are attached, so that the transfer of the microorganisms can be completed without external energy input. Since the fermentation substance is flattened under the clamping of the barrier net, the complete contact of the old material and the new material is ensured.

[0047] In some embodiments of the biogas equipment energy-saving reconstruction construction method provided in the present application, please refer to Figure 1 The side of the gas collecting tank 2 and the heat exchange tank 7 is provided with an auxiliary tank 4, and an arc-shaped pipe 3 is connected between the auxiliary tank 4 and the gas collecting tank 2. The gas collecting tank 2, the arc-shaped pipe 3 and the auxiliary tank 4 are slidably provided with a discharge plate 6, which is used to push the waste in the gas collecting tank 2 to the top of the auxiliary tank 4.

[0048] After being used for a period of time, the waste in the gas collecting tank 2 needs to be discharged. Since the gas collecting tank 2 and the like are buried underground, it is difficult for workers to clean the waste in the gas collecting tank 2, and there is also a certain danger. Therefore, the side of the gas collecting tank 2 and the heat exchange tank 7 is provided with an auxiliary tank 4, which is vertically arranged. An arc-shaped pipe 3 is connected between the auxiliary tank 4 and the gas collecting tank 2, and the gas collecting tank 2, the auxiliary tank 4 and the arc-shaped pipe 3 form a v-shaped structure.

[0049] The gas collecting tank 2 and the auxiliary tank 4 are both provided with an open side close to the arc-shaped pipe 3, and a discharging plate 6 is slidably arranged in the gas collecting tank 2, the arc-shaped pipe 3 and the auxiliary tank 4. The discharging plate 6 can slide along the gas collecting tank 2, the arc-shaped pipe 3 and the auxiliary tank 4. A sealing cover is arranged on the top of the auxiliary tank 4. When it is needed to discharge the old material in the gas collecting tank 2, the biogas in the gas collecting tank 2 is first extracted by the gas outlet pump 11, and the valves 21 are closed, then the sealing cover is opened, and the discharging plate 6 is slid from one end of the gas collecting tank 2 away from the auxiliary tank 4 along the arc-shaped pipe 3 and the auxiliary tank 4 in sequence, and finally the discharging plate 6 slides to the sealing cover. In the process of sliding of the discharging plate 6, the waste material can be dragged from the gas collecting tank 2 to the top of the auxiliary tank 4, so that the waste material can be taken out from the sealing cover.

[0050] In some embodiments of the method for energy-saving reconstruction and construction of the biogas equipment provided in the application, referring to Figure 1 , guide rails 5 are arranged along the axial direction of the gas collecting tank 2, the arc-shaped pipe 3 and the auxiliary tank 4, and the discharging plate 6 is rotationally matched with the guide rails 5.

[0051] Because of the existence of the arc-shaped pipe 3 and the auxiliary tank 4, the discharging plate 6 needs to change the direction of movement in the process of sliding. In order to enable the discharging plate 6 to move along the preset direction and prevent the discharging plate 6 from being limited in the process of sliding, guide rails 5 are arranged along the axial length direction of the gas collecting tank 2, the arc-shaped pipe 3 and the auxiliary tank 4, and the discharging plate 6 is provided with avoiding holes for sliding matching with the guide rails 5. Meanwhile, driving teeth are arranged on the discharging plate 6, and mounting teeth are arranged on the guide rails 5 for transmission matching with the driving teeth, and the mounting teeth are arranged along the length direction of the guide rails 5. The driving teeth are transmissionally connected with a motor, the motor drives the driving teeth to rotate, and the transmission matching between the driving teeth and the mounting teeth drives the whole discharging plate 6 to move, and the movement of the discharging plate 6 drives the waste material to move. In order to ensure the sealing property, sealing pads are arranged along the circumferential direction of the discharging plate 6, and the sealing pads can avoid the waste material from being adhered to the inner walls of the gas collecting tank 2, the arc-shaped pipe 3 and the auxiliary tank 4.

[0052] In some embodiments of the method for energy-saving reconstruction and construction of the biogas equipment provided in the application, referring to Figure 1 , the gas collecting tank 2 is communicated with a gas outlet pump 11, the gas collecting tank 2 is provided with gas inlet holes communicated with the plurality of reaction cavities, and the gas inlet holes are respectively provided with valves 21.

[0053] In the present application, the fermentation material needs to be replaced by opening the sealing cover. If the gas collecting tank 2 is always in communication with the discharge cavity 22, then after the sealing cover is opened, the biogas in the gas collecting tank 2 will be discharged from the sealing cover through the discharge cavity 22 and the reaction cavity, which has certain danger. In order to solve the above problem, a valve 21 is installed at the gas inlet in the present application, and each gas outlet cavity corresponds to a valve 21. When the fermentation material needs to be replaced by the sealing door or the old material in the gas collecting tank 2 needs to be discharged, the corresponding valve 21 should be closed to prevent the overflow of biogas. The valve 21 is controlled by electricity. Since the gas collecting tank 2 stores a certain pressure of biogas, in order to further improve the safety, the gas outlet pump 11 is communicated with the gas collecting tank 2. Before the operation, the biogas in the gas collecting tank 2 and the reaction chamber 8 is discharged through the gas outlet pump 11, and then the valve 21 is closed for subsequent operation.

[0054] In some embodiments of the energy-saving reconstruction and construction method of the biogas equipment provided in the present application, please refer to Figure 1 The heat exchange tank 7 is buckled with a heat insulation top plate 13, the bottom surface of the heat insulation top plate 13 is provided with a photovoltaic panel 12, the heat insulation top plate 13 is hinged to one side of the foundation pit 1, and the heat insulation top plate 13 swings upward to make the photovoltaic panel 12 contact sunlight. When the external temperature is relatively high, at this time, the reaction chamber 8 does not need to be heated by the ground source heat pump to extract hot water, at this time, the ground source heat pump can be in a closed state, and since the external temperature is relatively high, the heat exchange tank 7 can ensure the constant temperature through the heating of the outside.

[0055] In order to further recover energy, the heat insulation top plate 13 can be hinged to one side of the foundation pit 1, and a pushing piece is installed on the other side of the heat insulation top plate 13. Under the action of the pushing piece, the heat insulation top plate 13 swings around the hinge point. When the external temperature is relatively low, the heat insulation top plate 13 is buckled on the heat exchange tank 7 to avoid the loss of temperature in the heat exchange tank 7. When the external temperature rises and the light intensity is relatively high, the top plate can be swung by the pushing piece. And the bottom surface of the heat insulation top plate 13 is provided with a photovoltaic panel 12, when the top plate swings to a certain angle, the photovoltaic panel 12 is arranged at an acute angle with the ground, so as to convert light energy into electric energy.

[0056] The buckle plate at the top of the heat exchange tank 7 can also absorb the external heat to warm up the water in the heat exchange tank 7. When the external temperature is relatively low, the heat insulation top plate 13 is reset by the pushing piece to wrap the heat exchange tank 7 in the foundation pit 1 for heat preservation.

[0057] In some embodiments of the energy-saving reconstruction and construction method of the biogas equipment provided in the present application, please refer to Figure 1The gas collecting tank 2 is communicated with a burner 10, the burner 10 is used for heating the buried pipe 9, the burner 10 is communicated with a tail gas tank, the tail gas tank is used for collecting tail gas generated by biogas combustion in the burner 10, and the tail gas tank is used for passing the tail gas into the gas collecting tank 2 and the plurality of reaction chambers 8.

[0058] Through the above arrangement, the integration level in the application can be improved, and the heat insulation top plate 13 can be used as a support platform after being positioned at the top of the heat exchange tank 7, thus facilitating daily life and production needs.

[0059] In some embodiments of the biogas equipment energy-saving reconstruction construction method provided in the application, referring to Figure 1 and Figure 2 fixing the gas collecting tank 2 in the foundation pit 1 comprises:

[0060] A plurality of anchor rods 16 are drilled at the bottom of the foundation pit 1, and concrete 15 is poured at the bottom of the foundation pit 1.

[0061] After the concrete 15 is cured, the gas collecting tank 2 is fixed.

[0062] The heat insulation material 14 is laid in the excavated foundation pit 1, the gas collecting tank 2 is installed at the bottom of the foundation pit 1, the gas collecting tank 2 itself can be regarded as a cuboid structure, a plurality of gas inlet holes are formed at the top of the gas collecting tank 2. The plurality of gas inlet holes are parallel to each other and are arranged at a certain distance apart.

[0063] The heat exchange tank 7 is fixed at the top of the gas collecting tank 2, the heat exchange tank 7 is provided with a plurality of communication holes corresponding to the gas inlet holes. The water outlet of the ground source heat pump is communicated with the top of the heat exchange tank 7, and the water inlet of the ground source heat pump is communicated with the bottom of the heat exchange tank 7. A plurality of reaction chambers 8 are vertically arranged in the heat exchange tank 7, and each reaction chamber 8 is vertically arranged. The bottom of the reaction chamber 8 penetrates the communication hole and is communicated with the gas inlet hole, and the top of the reaction chamber 8 penetrates the heat exchange tank 7.

[0064] The reaction chamber 8 is used for placing fermentation materials, the ground source heat pump inputs cold water into the ground, the cold water is heated after heat exchange in the ground, and then hot water is input into the heat exchange tank 7, the reaction chamber 8 is soaked in the hot water extracted by the ground source heat pump, so that the temperature in the reaction chamber 8 can be kept constant. After the temperature in the reaction chamber 8 is kept constant, the biogas generated by the fermentation materials enters the gas collecting tank 2 from the bottom of the reaction chamber 8 through the gas inlet hole.

[0065] In the application, the reaction chamber 8 exchanges heat with hot water to ensure appropriate temperature, and due to the heat insulation effect of the heat exchange tank 7 and the heat insulation material 14, the influence of low external temperature on the temperature in the reaction chamber 8 can be avoided. The gas collecting tank 2 is located at the bottom of the heat exchange tank 7, and the gas collecting tank 2 can isolate the bottom of the foundation pit 1 from the heat exchange tank 7, thereby avoiding the decrease of the temperature of the hot water in the heat exchange tank 7.

[0066] In the actual installation process, in order to improve the stability of the position of the gas collecting tank 2 and have sufficient bearing capacity, a plurality of anchor rods 16 are arranged on the bottom of the foundation pit 1 after the foundation pit 1 is excavated, then the concrete 15 is poured on the top of the anchor rods 16, when the concrete 15 is solidified, the heat insulation material 14 is laid on the side wall of the foundation pit 1 and the top of the concrete 15, and then the gas collecting tank 2 is fixed after the heat insulation material 14 is laid, so that the gas collecting tank 2 can stably support the heat exchange tank 7.

[0067] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for energy-saving reconstruction and construction of a biogas equipment, characterized in that: include: constructing a buried pipe and connecting the buried pipe to a ground source heat pump; Excavating a foundation pit, fixing a gas collecting tank in the foundation pit, laying heat-insulating materials on the bottom and side walls of the foundation pit, and fixing a heat exchange tank on the top of the gas collecting tank; A plurality of reaction chambers are fixed in the heat exchange tank, and the reaction chambers are connected to the gas collecting tank; Connect the water outlet end of the buried pipe to the top of the heat exchange tank, and connect the water inlet end of the buried pipe to the bottom of the heat exchange tank; The underground hot water is circulated in the buried pipe and the heat exchange tank by the ground source heat pump; the fermentation product is added into the reaction chamber so that the biogas generated in the reaction chamber is passed into the gas collecting tank; An auxiliary tank is provided on one side of the gas collecting tank and the heat exchange tank, and an arc-shaped pipe is connected between the auxiliary tank and the gas collecting tank; a discharge plate is slidably provided in the gas collecting tank, the arc-shaped pipe and the auxiliary tank, and the discharge plate is used to push the waste material in the gas collecting tank to the top of the auxiliary tank; A guide rail is provided along the axial direction of the gas collecting tank, the arc tube and the auxiliary tank, and the discharge plate is rotatably matched with the guide rail.

2. The method for energy-saving reconstruction and construction of biogas equipment according to claim 1, characterized in that: The reaction chamber is provided with a discharge chamber and a reaction chamber, a first barrier net is slidably provided in the reaction chamber; the bottom of the discharge chamber is communicated with the gas collecting tank, the top of the reaction chamber is detachably connected with a closing cover, and the reaction chamber is used to accommodate fermentation products.

3. The method for energy-saving reconstruction and construction of biogas equipment according to claim 2, characterized in that: A second barrier net, a third barrier net and a fourth barrier net are slidingly provided in the reaction chamber; the first barrier net, the second barrier net, the third barrier net and the fourth barrier net are arranged in sequence; the first barrier net and the second barrier net are used to clamp old materials and new materials, and the third barrier net and the fourth barrier net are used to clamp new materials and old materials.

4. The method for energy-saving reconstruction and construction of biogas equipment according to claim 2, characterized in that: The gas collecting tank is connected to an air outlet pump, and the gas collecting tank is provided with air inlet holes connected to the plurality of reaction chambers, and valves are correspondingly installed on the air inlet holes.

5. The method for energy-saving reconstruction and construction of biogas equipment according to claim 4, characterized in that: The gas collecting tank is connected to a burner, which is used to heat the buried pipe. The burner is connected to a tail gas tank, which is used to collect tail gas generated by the combustion of biogas in the burner, and the tail gas tank is used to pass the tail gas into the gas collecting tank and the multiple reaction chambers.

6. The method for energy-saving reconstruction and construction of biogas equipment according to claim 5, characterized in that: The heat exchange tank is buckled with an insulating top plate, the bottom surface of the insulating top plate is provided with a photovoltaic panel, the insulating top plate is hinged to one side of the foundation pit, and the insulating top plate is swung upward to allow the photovoltaic panel to contact sunlight.

7. The method for energy-saving reconstruction and construction of biogas equipment according to claim 6, characterized in that: The air outlet pump and the burner are arranged between the heat exchange tank and the auxiliary tank; and the heat-insulating top plate is used as a supporting platform.

8. The method for energy-saving reconstruction and construction of biogas equipment according to claim 1, characterized in that: The fixing of the gas collecting tank in the foundation pit comprises: Drilling a plurality of anchor rods at the bottom of the foundation pit and pouring concrete at the bottom of the foundation pit; After the concrete is solidified, the gas collecting tank is fixed.

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