Heating method suitable for heating of small-gathering users based on stepped fermentation tank

Abstract

The invention discloses a stepped fermentation tank-based heating method suitable for heating of small-gathering users. The method comprises the following steps of: 1, building a stepped fermentation tank-based heating system suitable for the small-gathering users; 2, installing an instrument; thirdly, the heating water heated in the fermentation tank enters a heat preservation hot water tank; heating water in the heat preservation hot water tank sequentially passes through the heating areas and then flows back to the fermentation tank to be heated, and therefore circulation is completed; and 4, sequentially opening the fermentation tank movable baffles on the low step, sequentially transferring the wastes in the fermentation tank on the high step into the fermentation tank on the low step, and finally, filling the fermentation tank on the highest step with liquid organic matters and microorganisms through the cargo transportation step, thereby maintaining the operation of efficient heat production of the fermentation tanks. According to the system, renewable energy sources such as straw in northern rural areas can be fully utilized for heating, consumption of non-renewable energy sources such as coal is reduced, and the exhaust air rate of atmospheric pollutants is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of heating, and in particular relates to a heating system and a heating method suitable for small-group users based on a stepped fermentation tank. Background Art

[0002] At present, the proportion of clean heating in northern my country is low, especially in rural areas where a large amount of scattered coal is used in winter, resulting in large emissions of air pollutants. The northern region has a large amount of organic resources such as straw, but they are not well utilized, resulting in a waste of resources.

[0003] In addition, the distribution of rural residents in the north is relatively scattered. This distribution characteristic also means that it is difficult to implement traditional centralized heating in rural areas in the north. The main drawbacks are: 1. Traditional coal and firewood produce a large amount of air pollutants when burned.

[0004] 2. Traditional centralized heating is not suitable for the actual distribution of rural areas in the north.

[0005] 3. Traditional fermentation tanks cannot work during cleaning, have long working intervals, and are inconvenient to clean.

[0006] Based on this, a heating method that can meet the requirements of decentralized layout and replace traditional energy sources such as coal and firewood is needed to solve related problems. Summary of the invention

[0007] The technical problem to be solved by the invention is: in view of the problem that the existing technology cannot realize decentralized layout and will cause air pollution, a heating system and heating method suitable for small-group users based on a stepped fermentation tank is provided.

[0008] The technical solution of the present invention is specifically as follows: A heating method based on a stepped fermentation tank and suitable for heating small-group users includes the following steps: Step 1: Build a heating system suitable for small-group users based on a stepped fermentation tank: including heat source area equipment, heating circulation equipment and terminal heating equipment, among which the heating circulation equipment and terminal heating equipment constitute a floor heating system; The heat source zone equipment includes a fermentation tank and a liquid organic fermentation liquid in the fermentation tank; the fermentation tank is a stepped fermentation tank, including a cleaning platform and a cargo transport step, the cargo transport step includes a plurality of steps from high to low, and a fermentation tank is arranged on each step of the cargo transport step; Each fermentation tank includes a fixed pool bottom, three fixed pool walls and a movable baffle are arranged above the fixed pool bottom, and the three fixed pool walls and the movable baffle together form a fermentation tank; and the movable baffle is located at two adjacent steps, and a hoisting hole is arranged on the movable baffle, and the hoisting hole opens the movable baffle to transfer the liquid fermentation in the high fermentation tank to the fermentation tank on the lower step; A heat exchange pipe is laid in the fixed pool bottom, and the heat exchange pipe is connected with the heating pipe; The heating circulation equipment includes a heat source water distributor and a heat source water collector respectively connected to the heating pipeline, wherein a heating circulation water pump is arranged on the water collection and delivery pipeline of the heat source water collector, and the output end of the heating circulation water pump is connected to the insulated hot water tank through the heating pump delivery pipeline, the insulated hot water tank stores hot water, and a water level monitor and a water temperature monitor are arranged on the insulated hot water tank; The insulated hot water tank is connected to the terminal water distributor through the terminal water distribution pipeline, the insulated hot water tank is connected to the terminal water collector through the terminal water collection pipeline, the terminal water distributor is connected to the terminal water collector through the heating area geothermal coil, and the terminal water distributor, the terminal water collector and the heating area geothermal coil constitute the terminal heating equipment; Step 2: Install the instrument; Step 3: Under the action of the heating circulation water pump, the heating water heated in the fermentation tank passes through the heat exchange pipe and the heating pipe in turn and enters the insulated hot water tank; the heating water in the insulated hot water tank then passes through the heating area in turn and flows back to the fermentation tank for heating, thus completing the cycle; Step 4: When fully operational, each fermentation tank is filled with liquid organic fermentation material, the fermentation tank on the lower step starts fermentation first, and the fermentation tank on the highest step starts fermentation last; when replacing liquid organic matter: first, open the movable baffle of the fermentation tank on the lower step, transfer the waste in the fermentation tank on the lower step to the cleaning platform and then transport it away; then, open the movable baffles of the fermentation tank on the lower step in turn, transfer the waste in the fermentation tank on the high step to the fermentation tank on the lower step in turn, finally, fill the fermentation tank on the highest step with liquid organic matter and microorganisms through the cargo step, thereby maintaining the efficient heat production of the fermentation tank.

[0009] The insulated hot water tank is connected to the constant pressure water replenishment device and the solar collector through pipelines, wherein the constant pressure water replenishment device is arranged on the water distribution pipeline, and the water distribution pipeline is connected to the insulated hot water tank through the water replenishment pipeline; the solar collector is connected to the insulated hot water tank through the heating pipeline and the return pipeline.

[0010] An eighth solenoid valve and a third flowmeter are arranged on the water collection and delivery pipeline, and the eighth solenoid valve is located at the water outlet side of the heat source water collector; a second solenoid valve is arranged on the heating pumping pipeline, and a ninth solenoid valve and a third pressure gauge are arranged on the water distribution pipeline, and the ninth solenoid valve is located at the water inlet side of the heat source water distributor; a first flowmeter, a first pressure gauge and a seventh solenoid valve are arranged on the water supply pipeline; a sixth solenoid valve, a fifth thermometer and an auxiliary heating circulating water pump are arranged on the return water pipeline; a first solenoid valve and a second flowmeter are arranged on the terminal water distribution pipeline; a second pressure gauge and a third solenoid valve are arranged on the terminal water collection pipeline; a fifth solenoid valve, a sixth thermometer and an automatic exhaust valve are arranged on the insulated hot water tank, and the automatic exhaust valve is arranged at a high place in the connecting space of the insulated hot water tank; a fourth solenoid valve is arranged on the water outlet pipeline of the constant pressure water supply device; a first thermometer, a second thermometer, a third thermometer and a fourth thermometer are arranged on the water inlet pipeline of the heat source water collector; all thermometers, solenoid valves, flowmeters, pressure gauges and circulating water pumps are connected to the central processing unit.

[0011] The control strategy of the CPU is as follows: (1) When the water level monitor detects that the water level in the hot water tank drops abnormally, the signal is fed back to the central processor, which then performs the following processing: 1.1. Close the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the eighth solenoid valve, and the ninth solenoid valve, and turn off the heating circulation water pump and the auxiliary heating circulation water pump; 1.2. Check the values ​​of the first pressure gauge, the second pressure gauge, and the third pressure gauge: If the value of the first pressure gauge decreases significantly, it means that the heating circulation equipment has a large amount of water leakage; if the value of the second pressure gauge decreases significantly, it means that the terminal heating equipment has a large amount of water leakage; if the value of the third pressure gauge decreases significantly, it means that the heat source area equipment has a large amount of water leakage; (2) When the water level monitor detects that the water level in the insulated hot water tank rises abnormally, the signal is fed back to the central processor, which then performs the following processing: 2.1. Check the values ​​of the first flow meter, the second flow meter, and the third flow meter: If the value of the first flow meter is significantly smaller, it means that the heating circulation equipment has a pipe blockage; if the value of the second flow meter is significantly reduced, it means that the terminal heating equipment has a pipe blockage; if the value of the third flow meter is significantly reduced, it means that the heat source area equipment has a pipe blockage; 2.2. Close the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the eighth solenoid valve, and the ninth solenoid valve, and turn off the heating circulation water pump and the auxiliary heating circulation water pump; (3) When the water temperature monitor detects that the water temperature in the insulated hot water tank is lower than 38°C, the signal is fed back to the central processor, which performs the following processing: 3.1. Open the fifth solenoid valve and the sixth solenoid valve to run the auxiliary heating circulating water pump; 3.2. Check the values ​​of the first thermometer, the second thermometer, the third thermometer, and the fourth thermometer: if the value of a thermometer is lower than 38°C, a reminder is issued: timely check the situation in the corresponding fermentation tank and update the liquid organic fermentation product in time; 3.2. Check the values ​​of the fifth thermometer and the sixth thermometer: If the value of the fifth thermometer is higher than that of the sixth thermometer, close the fifth solenoid valve and the sixth solenoid valve, and stop the auxiliary heating circulating water pump; (4) When the water temperature monitor detects that the water temperature in the insulated hot water tank is higher than 62°C, the signal is fed back to the central processor, which performs the following processing: 4.1. Open the seventh solenoid valve to mix the low-temperature return water with the high-temperature supply water; 4.2. If the water temperature in the insulated hot water tank is lower than 60°C, close the seventh solenoid valve.

[0012] The beneficial effects of the present invention are: 1. The present invention can make full use of renewable energy sources such as straw in northern rural areas for heating, reduce the consumption of non-renewable energy such as coal, and reduce the exhaust volume of atmospheric pollutants.

[0013] 2. The present invention can reduce the pressure of straw and provide fertilizer for crops by utilizing renewable energy such as straw.

[0014] 3. When the present invention handles some abnormal conditions, it can replace manual control and save manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the principle diagram of the present invention; Figure 2 This is a schematic diagram of the piping layout of the stepped fermentation tank; Figure 3 It is a side view of the fermentation tank; Figure 4 This is a schematic diagram of the heat exchange pipeline layout; Figure 5 It is the structural diagram of the slot node; Figure 6 This is a structural diagram of the floor heating system; Figure 7 It is the strategy diagram of water level control system; Figure 8 This is the strategy diagram of the water temperature control system. DETAILED DESCRIPTION

[0016] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] like Figure 1 — Figure 6 As shown, a heating system suitable for small-group users based on a stepped fermentation tank is implemented according to functional segments, including a heat source area device 1, a heating circulation device 2 and a terminal heating device 3, wherein the heating circulation device 2 and the terminal heating device 3 constitute a floor heating system.

[0019] The heat source area equipment 1 includes a fermentation tank and a liquid organic fermentation liquid 100 in the fermentation tank. The fermentation tank is a stepped fermentation tank, including a cleaning platform 101 and a cargo step 102. The cargo step 102 includes multiple steps from high to low, and a fermentation tank is arranged on each step of the cargo step 102.

[0020] It should be noted that, in the figure, there are five steps, and multiple steps can be set according to actual conditions. The highest step is step ①, and the lowest step is step ⑤. The cleaning platform 101 is located at the bottom of step ⑤. The cleaning platform 101 is used to clean and transfer the fermented material in tank ⑤. The cargo step 102 is a platform for replenishing raw materials, transferring fermented materials, and inspecting the fermentation tank.

[0021] Each fermentation tank includes a fixed pool bottom 12 at the bottom, three fixed pool walls 11 and a movable baffle 19 are arranged above the fixed pool bottom 12, and the three fixed pool walls 11 and the movable baffle 19 together form a fermentation tank; and the movable baffle 19 is located at two adjacent steps, and a lifting hole 191 is arranged on the movable baffle 19. The lifting hole 191 can open the movable baffle 19 to transfer the liquid fermentation material in the high fermentation tank to the fermentation tank on the lower step.

[0022] A heat exchange pipe 13 is laid in the fixed pool bottom 12, and the heat exchange pipe 13 is supported by a heat exchange pipe support 14. The heat exchange pipe support 14 serves as a platform to support the heat exchange pipe, so that the heat exchange pipe is fully in contact with the liquid fermentation product. A pipe hole 15 is opened on the side fixed pool wall 11, and a heating pipe 16 is arranged in the pipe hole 15. The heating pipe 16 is connected to the heat exchange pipe 13. Cover plate support 17 is arranged around the fixed pool wall 11. The cover plate support 17 is used to support the cover plate 171 of the fermentation tank. The cover plate 171 covers the fermentation tank to create an oxygen-deficient and oxygen-free environment for the fermentation tank.

[0023] Furthermore, a slot 111 is provided on the side of the fixed pool wall 11 , and a movable baffle 19 is provided in the slot 111 .

[0024] Furthermore, a heat-insulating material is laid on the fixed pool wall 11 to reduce heat loss.

[0025] Furthermore, a heat insulating layer is laid inside the fixed pool bottom 12 to reduce heat loss. The fixed pool bottom 12 is divided into a pool bottom section A 121 and a pool bottom section B 122: the pool bottom section A 121 is a sloped section, and the pool bottom section B 122 is a horizontal section; the sloped section is conducive to the transfer of waste materials, and the horizontal section can reduce the pressure of the material on the baffle.

[0026] Furthermore, the heat transfer coefficient of the heat exchange pipe 13 is large, which is conducive to quickly absorbing the heat in the fermentation tank; the heating pipe 16 is wrapped with insulation material to reduce the heat loss of the pipe.

[0027] Furthermore, a ventilation hole 18 is provided on the fixed pool wall 11, and the ventilation hole 18 is a gas discharge port.

[0028] The heating circulation equipment 2 includes a heat source water distributor 21 and a heat source water collector 22 respectively connected to the heating pipe 16, wherein a heating circulation water pump 23 is arranged on the water collection and delivery pipeline 401 of the heat source water collector 22, and the heating circulation water pump 23 provides power for the entire heating system. The output end of the heating circulation water pump 23 is connected to the insulated hot water tank 24 through the heating pumping pipeline 402. The insulated hot water tank 24 stores hot water, and a water level monitor and a water temperature monitor are arranged on the insulated hot water tank 24.

[0029] The heat preservation hot water tank 24 is connected to the constant pressure water replenishment device 25 and the solar collector 26 through pipelines, wherein the constant pressure water replenishment device 25 stabilizes the pressure of the heating system and replenishes the water lost by the heating system, and the solar collector 26 assists in heating the hot water. Specifically, the constant pressure water replenishment device 25 is arranged on the water distribution pipeline 403, and the water distribution pipeline 403 is connected to the heat preservation hot water tank 24 through the water replenishment pipeline 404. The solar collector 26 is connected to the heat preservation hot water tank 24 through the heating pipeline and the return water pipeline 405.

[0030] The insulated hot water tank 24 is connected to the terminal water distributor 31 through the terminal water distribution pipeline 406, the insulated hot water tank 24 is connected to the terminal water collector 32 through the terminal water collection pipeline 407, the terminal water distributor 31 is connected to the terminal water collector 32 through the heating area geothermal coil, and the terminal water distributor 31, the terminal water collector 32 and the heating area geothermal coil constitute the terminal heating equipment 3.

[0031] An eighth solenoid valve F8 and a third flow meter L3 are provided on the water collection and delivery pipeline 401, and the eighth solenoid valve F8 is located on the water outlet side of the heat source water collector 22; a second solenoid valve F2 is provided on the heating pumping pipeline 402, and a ninth solenoid valve F9 and a third pressure gauge Y3 are provided on the water distribution pipeline 403, and the ninth solenoid valve F9 is located on the water inlet side of the heat source water distributor 21; a first flow meter L1, a first pressure gauge Y1 and a seventh solenoid valve F7 are provided on the water supply pipeline 404; a sixth solenoid valve F6, a fifth thermometer W5 and an auxiliary heating circulation water pump 28 are provided on the return water pipeline 405; a first solenoid valve F1 and a second flow meter L2 are provided on the terminal water distribution pipeline 406; A second pressure gauge Y2 and a third solenoid valve F3 are provided on 407; a fifth solenoid valve F5, a sixth thermometer W6 and an automatic exhaust valve P are provided on the insulated hot water tank 24, and the automatic exhaust valve P is provided at a high position of the connecting space of the insulated hot water tank to automatically exhaust the accumulated air in the insulated hot water tank; a fourth solenoid valve F4 is provided on the water outlet pipe of the constant pressure water replenishment device 25; at least one thermometer is provided on the water inlet pipe of the heat source water collector 22, and each thermometer corresponds to a heating pipe 16. In the figure, thermometers are respectively provided for heating pipes No. 1 to No. 4, that is, a first thermometer W1, a second thermometer W2, a third thermometer W3 and a fourth thermometer W4 are provided on the water inlet pipe of the heat source water collector 22.

[0032] All of the above-mentioned thermometers, solenoid valves, flow meters, pressure gauges, circulating water pumps, etc. are connected to the central processor 27, which collects data from various instruments and regulates the operation of various equipment and valves.

[0033] The implementation principle of fermentation tank of the present invention is: 1. The liquid organic matter in the fermentation tank will generate a lot of heat during the decomposition process of microorganisms and the self-reproduction of microorganisms.

[0034] 2. The heat exchange pipe 13 with low-temperature water flowing therein can take away the high-temperature heat in the liquid organic matter fermentation tank, thereby increasing the temperature of the heating water.

[0035] A heating method for a small gathering user heating system based on a stepped fermentation tank, the working conditions of the system are as follows: Step 1: Build a heating system suitable for small-group users based on a stepped fermentation tank: including indoor stepped fermentation tanks and equipment rooms in the heat source area equipment 1; Step 2: Install related equipment, instruments, valves and connecting pipes; Step 3: Under the action of the heating circulation water pump 23, the heating water after the fermentation tank is heated, passes through the heat exchange pipe 13 and the heating pipe 16 in turn, and enters the thermal insulation hot water tank 24; the heating water in the thermal insulation hot water tank 24 passes through the heating area in turn, and then flows back to the fermentation tank for heating, thereby completing the cycle. Among them, part of the hot water stored in the thermal insulation hot water tank 24 is heated by the solar collector 26 under the action of the auxiliary heating circulation water pump 28, and flows back to the thermal insulation hot water tank 24. The water level in the thermal insulation hot water tank 24 fluctuates within a small range.

[0036] The third step is the heating water circulation operation stage.

[0037] Step 4: When fully operational, each fermentation tank is filled with liquid organic fermentation material, the fermentation tank on the lower step starts fermentation first, and the fermentation tank on the highest step ferments last; when replacing liquid organic matter: first, open the movable baffle of the fermentation tank on the lower step, transfer the waste in the fermentation tank on the lower step to the cleaning platform 101 and then transport it away; then, open the movable baffles of the fermentation tank on the lower step in turn, transfer the waste in the fermentation tank on the high step to the fermentation tank on the lower step in turn, and finally, fill the fermentation tank on the highest step with liquid organic matter and microorganisms through the cargo step 102, thereby maintaining the efficient heat production operation of the fermentation tank.

[0038] In the diagram, fermentation tanks 1, 2, 3, and 4 are all filled with liquid organic fermentation materials (there is a certain time interval when each fermentation tank is filled with liquid organic fermentation materials, with fermentation tank 4 starting first and fermentation tank 1 ending). When replacing liquid organic matter: first, open the movable baffle of fermentation tank 4, transfer the waste in fermentation tank 4 to cleaning tank 5, and then transport it away through the cleaning platform; then, open the movable baffle of fermentation tank 3, transfer the waste in fermentation tank 3 to fermentation tank 4, and continue fermentation; then, open the movable baffle of fermentation tank 2+, transfer the waste in fermentation tank 2 to fermentation tank 3, and continue fermentation; then, open the movable baffle of fermentation tank 1, transfer the waste in fermentation tank 1 to fermentation tank 2, and continue fermentation; finally, fill fermentation tank 1 with liquid organic matter and microorganisms through the cargo transport step. The efficient heat production operation of the fermentation tank is maintained.

[0039] like Figure 7 , Figure 8 As shown, the control strategy of the central processor 27 is as follows: (1) When the water level monitor detects that the water level in the hot water tank 24 drops abnormally, the signal is fed back to the central processor 27, and the central processor 27 performs the following processing: 1.1. Close the first solenoid valve F1, the second solenoid valve F2, the third solenoid valve F3, the fourth solenoid valve F4, the eighth solenoid valve F8, the ninth solenoid valve F9, and close the heating circulation water pump 23 and the auxiliary heating circulation water pump 28; 1.2. Check the values ​​of the first pressure gauge Y1, the second pressure gauge Y2, and the third pressure gauge Y3. If the value of the first pressure gauge Y1 decreases significantly, it means that the heating circulation equipment 2 has a large amount of water leakage; if the value of the second pressure gauge Y2 decreases significantly, it means that the terminal heating equipment 3 has a large amount of water leakage; if the value of the third pressure gauge Y3 decreases significantly, it means that the heat source area equipment 1 has a large amount of water leakage.

[0040] (2) When the water level monitor detects that the water level in the insulated hot water tank 24 rises abnormally, the signal is fed back to the central processor 27, and the central processor performs the following processing: 2.1. Check the values ​​of the first flow meter L1, the second flow meter L2, and the third flow meter L3. If the value of the first flow meter L1 is significantly smaller, it means that the heating circulation equipment 2 has a pipe blockage; if the value of the second flow meter L2 is significantly reduced, it means that the terminal heating equipment 3 has a pipe blockage; if the value of the third flow meter L3 is significantly reduced, it means that the heat source area equipment 1 has a pipe blockage; 2.2. Close the first solenoid valve F1, the second solenoid valve F2, the third solenoid valve F3, the fourth solenoid valve F4, the eighth solenoid valve F8, and the ninth solenoid valve F9, and close the heating circulation water pump 23 and the auxiliary heating circulation water pump 28.

[0041] (3) When the water temperature monitor detects that the water temperature in the insulated hot water tank 24 is lower than 38°C, the signal is fed back to the central processor 27, and the central processor performs the following processing: 3.1. Open the fifth solenoid valve F5 and the sixth solenoid valve F6 to operate the auxiliary heating circulating water pump 28; 3.2. Check the values ​​of the first thermometer W1, the second thermometer W2, the third thermometer W3, and the fourth thermometer W4. If the value of a thermometer is lower than 38°C, a reminder is issued: check the situation in the corresponding fermentation tank in time and update the liquid organic fermentation product in time; 3.2. Check the values ​​of the fifth thermometer W5 and the sixth thermometer W6. If the value of the fifth thermometer W5 is higher than the value of the sixth thermometer W6, close the fifth solenoid valve F5 and the sixth solenoid valve F6, and stop the auxiliary heating circulation water pump 28.

[0042] (4) When the water temperature monitor detects that the water temperature in the insulated hot water tank 24 is higher than 62°C, the signal is fed back to the central processor 27, and the central processor performs the following processing: 4.1. Open the seventh solenoid valve F7 to mix the low-temperature return water with the high-temperature supply water; 4.2. If the water temperature in the heat-insulating hot water tank 24 is lower than 60° C., close the seventh solenoid valve F7.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. A heating method based on a stepped fermentation tank suitable for heating small gathering users, characterized in that: The steps include: Step 1: construct a heating system suitable for small-group users based on a stepped fermentation tank: including heat source area equipment (1), heating circulation equipment (2) and terminal heating equipment (3), wherein the heating circulation equipment (2) and the terminal heating equipment (3) constitute a floor heating system; The heat source area equipment (1) comprises a fermentation tank and a liquid organic fermentation liquid (100) located in the fermentation tank; the fermentation tank is a stepped fermentation tank, comprising a cleaning platform (101) and a cargo transport step (102); the cargo transport step (102) comprises a plurality of steps from high to low, and a fermentation tank is arranged on each step of the cargo transport step (102); Each fermentation tank comprises a fixed pool bottom (12) at the bottom, three fixed pool walls (11) and a movable baffle (19) are arranged above the fixed pool bottom (12), and the three fixed pool walls (11) and the movable baffle (19) together form a fermentation tank; and the movable baffle (19) is located at two adjacent steps, and a lifting hole (191) is arranged on the movable baffle (19), and the lifting hole (191) opens the movable baffle (19) to transfer the liquid fermentation material in the fermentation tank at the upper step to the fermentation tank at the lower step; A heat exchange pipe (13) is laid in the fixed pool bottom (12), and the heat exchange pipe (13) is connected to the heating pipe (16); The heating circulation equipment (2) comprises a heat source water distributor (21) and a heat source water collector (22) respectively connected to the heating pipe (16), wherein a heating circulation water pump (23) is arranged on the water collection and delivery pipeline (401) of the heat source water collector (22), and the output end of the heating circulation water pump (23) is connected to the heat preservation hot water tank (24) through the heating pump delivery pipeline (402), the heat preservation hot water tank (24) stores hot water, and a water level monitor and a water temperature monitor are arranged on the heat preservation hot water tank (24); The heat-insulating hot water tank (24) is connected to the terminal water distributor (31) via the terminal water distribution pipeline (406); the heat-insulating hot water tank (24) is connected to the terminal water collector (32) via the terminal water collection pipeline (407); the terminal water distributor (31) is connected to the terminal water collector (32) via the heating area geothermal coil; the terminal water distributor (31), the terminal water collector (32) and the heating area geothermal coil constitute the terminal heating device (3); Step 2: Install the instrument; Step 3: Under the action of the heating circulation water pump (23), the heating water heated in the fermentation tank passes through the heat exchange pipe (13) and the heating pipe (16) in sequence and enters the heat preservation hot water tank (24); the heating water in the heat preservation hot water tank (24) then passes through the heating area in sequence and flows back to the fermentation tank for heating, thereby completing the cycle; Step 4: When fully operational, each fermentation tank is filled with liquid organic fermentation material, the fermentation tank on the lower step starts fermentation first, and the fermentation tank on the highest step ferments last; when replacing liquid organic matter: first, open the movable baffle of the fermentation tank on the lower step, transfer the waste in the fermentation tank on the lower step to the cleaning platform (101) and then transport it away; then, open the movable baffles of the fermentation tank on the lower step in turn, transfer the waste in the fermentation tank on the higher step in turn to the fermentation tank on the lower step, and finally, fill the fermentation tank on the highest step with liquid organic matter and microorganisms through the transport step (102), thereby maintaining the efficient heat production operation of the fermentation tank.

2. The heating method based on the stepped fermentation tank and applicable to heating of small gathering users according to claim 1 is characterized in that: The heat-insulating hot water tank (24) is connected to the constant-pressure water replenishment device (25) and the solar thermal collector (26) through pipelines, wherein the constant-pressure water replenishment device (25) is arranged on a water distribution pipeline (403), and the water distribution pipeline (403) is connected to the heat-insulating hot water tank (24) through a water replenishment pipeline (404); and the solar thermal collector (26) is connected to the heat-insulating hot water tank (24) through a heating pipeline and a return water pipeline (405).

3. The heating method based on the stepped fermentation tank and applicable to heating of small gathering users according to claim 2 is characterized in that: An eighth solenoid valve (F8) and a third flow meter (L3) are provided on the water collection and delivery pipeline (401), and the eighth solenoid valve (F8) is located on the water outlet side of the heat source water collector (22); a second solenoid valve (F2) is provided on the heating pumping pipeline (402), a ninth solenoid valve (F9) and a third pressure gauge (Y3) are provided on the water distribution pipeline (403), and the ninth solenoid valve (F9) is located on the water inlet side of the heat source water distributor (21); a first flow meter (L1), a first pressure gauge (Y1) and a seventh solenoid valve (F7) are provided on the water supply pipeline (404); a sixth solenoid valve (F6), a fifth thermometer (W5) and an auxiliary heating circulation water pump (28) are provided on the return water pipeline (405); and a pressure gauge (W5) is provided on the terminal water distribution pipeline (406). A first solenoid valve (F1) and a second flow meter (L2) are provided; a second pressure gauge (Y2) and a third solenoid valve (F3) are provided on the terminal water collection pipeline (407); a fifth solenoid valve (F5), a sixth thermometer (W6) and an automatic exhaust valve (P) are provided on the heat-insulating hot water tank (24), and the automatic exhaust valve (P) is provided at a high position of the communication space of the heat-insulating hot water tank; a fourth solenoid valve (F4) is provided on the outlet pipeline of the constant-pressure water replenishment device (25); a first thermometer (W1), a second thermometer (W2), a third thermometer (W3) and a fourth thermometer (W4) are provided on the inlet pipeline of the heat source water collector (22); and all the thermometers, solenoid valves, flow meters, pressure gauges and circulating water pumps are connected to a central processor (27).

4. The heating method based on the stepped fermentation tank and applicable to heating of small gathering users according to claim 3 is characterized in that: The control strategy of the central processing unit (27) is as follows: (1) When the water level monitor detects that the water level in the insulated hot water tank (24) drops abnormally, the signal is fed back to the central processor (27), and the central processor (27) performs the following processing: 1.

1. Close the first solenoid valve (F1), the second solenoid valve (F2), the third solenoid valve (F3), the fourth solenoid valve (F4), the eighth solenoid valve (F8), and the ninth solenoid valve (F9), and turn off the heating circulation water pump (23) and the auxiliary heating circulation water pump (28); 1.

2. Check the values ​​of the first pressure gauge (Y1), the second pressure gauge (Y2), and the third pressure gauge (Y3): If the value of the first pressure gauge (Y1) decreases significantly, it means that the heating circulation equipment (2) has a large amount of water leakage; if the value of the second pressure gauge (Y2) decreases significantly, it means that the terminal heating equipment (3) has a large amount of water leakage; if the value of the third pressure gauge (Y3) decreases significantly, it means that the heat source area equipment (1) has a large amount of water leakage; (2) When the water level monitor detects that the water level in the insulated hot water tank (24) rises abnormally, the signal is fed back to the central processor (27), and the central processor performs the following processing: 2.

1. Check the values ​​of the first flow meter (L1), the second flow meter (L2), and the third flow meter (L3): If the value of the first flow meter (L1) is significantly smaller, it means that the pipe of the heating circulation equipment (2) is blocked; if the value of the second flow meter (L2) is significantly reduced, it means that the pipe of the terminal heating equipment (3) is blocked; if the value of the third flow meter (L3) is significantly reduced, it means that the pipe of the heat source area equipment (1) is blocked; 2.

2. Close the first solenoid valve (F1), the second solenoid valve (F2), the third solenoid valve (F3), the fourth solenoid valve (F4), the eighth solenoid valve (F8), and the ninth solenoid valve (F9), and turn off the heating circulation water pump (23) and the auxiliary heating circulation water pump (28); (3) When the water temperature monitor detects that the water temperature in the insulated hot water tank (24) is lower than 38°C, the signal is fed back to the central processor (27), and the central processor performs the following processing: 3.

1. Open the fifth solenoid valve (F5) and the sixth solenoid valve (F6) to operate the auxiliary heating circulating water pump (28); 3.

2. Check the values ​​of the first thermometer (W1), the second thermometer (W2), the third thermometer (W3), and the fourth thermometer (W4): If the value of a thermometer is lower than 38°C, a reminder is issued: Check the situation in the corresponding fermentation tank in time and update the liquid organic fermentation product in time; 3.

2. Check the values ​​of the fifth thermometer (W5) and the sixth thermometer (W6): If the value of the fifth thermometer (W5) is higher than the value of the sixth thermometer (W6), close the fifth solenoid valve (F5) and the sixth solenoid valve (F6), and stop the auxiliary heating circulation water pump (28); (4) When the water temperature monitor detects that the water temperature in the insulated hot water tank (24) is higher than 62°C, the signal is fed back to the central processor (27), and the central processor performs the following processing: 4.

1. Open the seventh solenoid valve (F7) to mix the low-temperature return water with the high-temperature supply water; 4.

2. If the water temperature in the heat-insulating hot water tank (24) is lower than 60°C, close the seventh solenoid valve (F7).

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