A sewage biochemical system and hot water supply system heat linkage system and heat linkage method

Abstract

The application discloses a sewage biochemical system and hot water supply system heat linkage system and a heat linkage method. The sewage biochemical system and hot water supply system heat linkage system comprises an aeration system, an anaerobic gas-liquid heat exchange system, a hot water heat exchange and constant-pressure water supply system and an aerobic aeration system. The aeration system is in communication with the anaerobic gas-liquid heat exchange system and the hot water heat exchange system at the same time. The hot water heat exchange system is in communication with the hot water constant-pressure water supply system. The anaerobic gas-liquid heat exchange system and the hot water heat exchange system are in communication with the aerobic aeration system at the same time. The system has the advantages of simple and reliable equipment, increased internal heat allocation, reduced scale and use frequency of the aerobic tank cooling device, remarkable energy-saving and consumption-reducing effect and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to biochemical system waste heat utilization system technical field, especially to a sewage biochemical system and hot water supply system heat linkage system and heat linkage method. BACKGROUND

[0002] In the present sewage treatment, the power consumption of aeration system accounts for about 40-60% of the total sewage station power consumption, part of the electrical energy is converted into heat energy loss. In addition, the heat generated by equipment and pipelines is transferred to the biochemical tank, causing the temperature of the biochemical system to rise, which is not conducive to the reproduction of microbial flora, and the biochemical mixed liquid must be cooled by an additional cooling water system. The temperature of the anaerobic system is usually lower than the temperature suitable for microbial growth and reproduction. The purpose of the present application is to collect and utilize the heat generated at the front end of the biochemical aeration system in advance, recycle the heat in the sewage station, and store it in the form of hot water for supply to the factory area and even surrounding enterprises, while reducing the scale and investment of the biochemical system heat exchange process and the regular hot water supply system in the factory.

[0003] The existing sewage treatment station does not utilize the waste heat of the biochemical aeration system, and it is difficult to control the temperature of the biochemical tank, especially in summer when the temperature is high and the water volume is abundant. The temperature in the biochemical tank is difficult to control, which affects the flocculation effect of activated sludge, the population of protozoa, sludge settling, and ultimately leads to poor sludge activity and reduced degradation efficiency. On the other hand, the higher the temperature of the sewage, the lower the dissolved oxygen content in the sewage, which will lead to insufficient oxygen supply to the activated sludge and anoxic conditions, requiring more energy consumption for aeration in the biochemical tank. Therefore, it is necessary to exchange heat, collect and utilize the heat at the front end of the aeration system, to intervene in advance for the stable operation of the entire sewage treatment station, and effectively utilize the waste heat to reduce the overall project investment.

[0004] Therefore, a sewage biochemical system and hot water supply system heat linkage system and heat linkage method are provided to solve the above problems. SUMMARY

[0005] The technical problem to be solved by the present application is that the existing sewage treatment station is in a state of unused waste heat for the biochemical aeration part, and the temperature control of the biochemical tank is difficult, especially in summer with high temperature and abundant water, the temperature in the biochemical tank is difficult to control, which affects the flocculation effect of activated sludge, protozoan population, sludge settling, etc., ultimately leading to poor sludge activity and reduced degradation efficiency. On the other hand, the higher the temperature of the sewage, the lower the dissolved oxygen content in the sewage, which will lead to insufficient oxygen supply to the activated sludge and anoxic, and more energy consumption is needed for the aeration of the biochemical tank. Therefore, it is urgent to exchange, collect and utilize the heat at the front end of the aeration system, to intervene in advance for the stable operation of the entire sewage treatment station, and effectively utilize the waste heat to reduce the overall project investment, so a sewage biochemical system and hot water supply system heat linkage system and heat linkage method are provided, the sewage biochemical system and hot water supply system heat linkage system comprises:

[0006] an aeration system, an anaerobic gas-liquid heat exchange system, a hot water heat exchange and constant pressure water supply system and an aerobic aeration system; the aeration system is in communication with the anaerobic gas-liquid heat exchange system and the hot water heat exchange system at the same time, the hot water heat exchange system is in communication with the hot water constant pressure water supply system, and the anaerobic gas-liquid heat exchange system, the hot water heat exchange system and the aerobic aeration system are in communication at the same time;

[0007] the hot water heat exchange and constant pressure water supply system comprises a first hot water supply tank, a second hot water supply tank and a hot water supply main pipe, the first hot water supply tank and the second hot water supply tank are in communication with the aeration system at the same time, the first hot water supply tank and the second hot water supply tank are in communication with the aerobic aeration system at the same time, and the first hot water supply tank and the second hot water supply tank are also in communication with the hot water supply main pipe at the same time;

[0008] the first hot water supply tank comprises a second air inlet, a first water supplement inlet, a second air outlet, a first hot water outlet and a first mixing stirrer, the first mixing stirrer is fixedly installed in the first hot water supply tank, the second air inlet is in communication with the aeration system, the first water supplement inlet is in communication with external tap water, the second air outlet is in communication with the aerobic aeration system, and the first hot water outlet is in communication with the hot water main pipe;

[0009] the second hot water supply tank comprises a third air inlet, a second water supplement inlet, a third air outlet, a second hot water outlet and a second mixing stirrer, the second mixing stirrer is fixedly installed in the second hot water supply tank, the third air inlet is in communication with the aeration system, the second water supplement inlet is in communication with external tap water, the third air outlet is in communication with the aerobic aeration system, and the second hot water outlet is in communication with the hot water main pipe.

[0010] Further, the aeration system is an aeration fan, the aeration fan is connected to the anaerobic gas-liquid heat exchange system, the second air inlet of the first hot water supply tank and the third air inlet of the second hot water supply tank in parallel through a fan air supply main pipe, and a first thermometer is arranged on the fan air supply main pipe.

[0011] Further, the anaerobic gas-liquid heat exchange system comprises an anaerobic tank, an anaerobic gas-liquid heat exchange device is fixedly installed at the bottom of the anaerobic tank, a first air inlet is arranged on the anaerobic gas-liquid heat exchange device, the first air inlet is connected to the fan air supply main pipe through the anaerobic tank, a first air inlet valve is fixedly arranged on the pipeline between the first air inlet and the fan air supply main pipe, a first air outlet is arranged at the end of the first air inlet of the anaerobic gas-liquid heat exchange device, the first air outlet is connected to the aerobic aeration system through the anaerobic tank, a first air outlet valve is fixedly installed on the pipeline at the first air outlet, and a second thermometer is fixedly arranged in the anaerobic tank.

[0012] Further, a second air inlet valve is fixedly installed on the pipeline at the second air inlet, a first water supplement valve is fixedly installed on the pipeline at the first water supplement inlet, a second air outlet valve is fixedly installed on the pipeline at the second air outlet, a first hot water valve is fixedly arranged on the pipeline at the first hot water outlet, a constant pressure water supply pump is fixedly installed between the first hot water valve and the hot water supply main pipe, a first liquid level meter and a third thermometer are fixedly installed on the first hot water supply tank.

[0013] Further, a third air inlet valve is fixedly installed on the pipeline at the third air inlet, a second water supplement valve is fixedly installed on the pipeline at the second water supplement inlet, a third air outlet valve is fixedly installed on the pipeline at the third air outlet, a second hot water valve is fixedly arranged on the pipeline at the second hot water outlet, a constant pressure water supply pump is fixedly installed between the second hot water valve and the hot water supply main pipe, a second liquid level meter and a fourth thermometer are fixedly installed on the second hot water supply tank.

[0014] Further, the aerobic aeration system comprises an aerobic tank, an aeration device is fixedly installed at the bottom of the aerobic tank, and an air outlet main pipe is arranged, the air inlet end of the air outlet main pipe is connected to the first air outlet, the second air outlet and the third air outlet at the same time, the air outlet end of the air outlet main pipe is connected to the aeration device, a fifth thermometer is fixedly installed on the air outlet main pipe, and a sixth thermometer is fixedly installed on the aerobic tank.

[0015] Further, the anaerobic gas-liquid heat exchange device is a plurality of parallel arranged circular thin-walled stainless steel pipes.

[0016] Further, the first hot water supply tank and the second hot water supply tank are structurally identical, the main material of the first hot water supply tank is 304 stainless steel, the outer wall of the first hot water supply tank is provided with an inner concave square groove, the groove depth of the inner concave square groove is greater than 1 / 20 of the tank diameter of the first hot water supply tank, a jacket layer is sleeved outside the outer wall of the first hot water supply tank, the inner layer of the jacket layer is used for gas-liquid heat exchange, and the outermost layer is used for external heat preservation of the first hot water supply tank.

[0017] Further, the first mixing stirrer and the second mixing stirrer are both low-speed stirrers, the depth of the first mixing stirrer inserted into the first hot water supply tank is 3 / 4 of the liquid level height, and the depth of the second mixing stirrer inserted into the second hot water supply tank is 3 / 4 of the liquid level height.

[0018] Further, the horizontal height of the second gas inlet is higher than that of the second gas outlet, and the horizontal height of the third gas inlet is higher than that of the third gas outlet.

[0019] Further, the application also provides a sewage biochemical system and hot water supply system heat linkage method for the sewage biochemical system and hot water supply system heat linkage system.

[0020] S1: When tap water in the first hot water supply tank and the second hot water supply tank is fully filled, open the first gas inlet valve and the first gas outlet valve of the anaerobic tank, and the second gas inlet valve and the second gas outlet valve of the first hot water supply tank;

[0021] S2: Open the aeration fan, and the hot gas source flows through the anaerobic gas-liquid heat exchange device and the heat exchange tank jacket layer through the pipeline. Since the gas temperature is high and the liquid temperature is low, part of the heat carried by the gas is transferred to the liquid. After the gas source is heat-exchanged, it enters the aeration system. It should be noted that the first gas inlet valve of the anaerobic gas-liquid heat exchange device is preferably an adjusting valve, and the opening of the first gas inlet valve is adjusted according to the second thermometer;

[0022] S3: After the temperature of the first hot water supply tank reaches the set value, open the third gas inlet valve and the third gas outlet valve of the second hot water supply tank;

[0023] S4: Close the second gas inlet valve and the second gas outlet valve of the first hot water supply tank, and open the first hot water valve of the hot water supply tank;

[0024] S5: The hot water constant pressure water supply system automatically operates according to the pressure of the system self-contained pressure tank pressure gauge. When the pressure is lower than the set value, the first constant pressure water supply pump or the second constant pressure water supply pump is opened. When the pressure gauge reaches the set high pressure value, the first constant pressure water supply pump or the second constant pressure water supply pump is automatically closed.

[0025] S6: After the first water level meter of the first hot water tank reaches the set low value, open the second hot water valve, the second air inlet valve and the second air outlet valve of the hot water tank, then close the first hot water valve, the third air inlet valve and the third air outlet valve of the second hot water tank, open the first water supplement valve, and close the water supplement valve after the first water level meter reaches the set high value.

[0026] S7: After the second water level meter of the second hot water tank reaches the set low value, open the first hot water valve, the third air inlet valve and the third air outlet valve of the hot water tank, then close the second hot water valve, the second air inlet valve and the second air outlet valve of the hot water tank, open the second water supplement valve, and close the water supplement valve after the second water level meter reaches the set high value. Return to S6 operation.

[0027] The present application has the following beneficial effects:

[0028] 1. The process and equipment used in the present application are simple and reliable, the water supplement, hot water supply and heat preservation operations do not affect the continuous operation of the whole aeration system, the degree of automation is high, the operation is convenient, the equipment manufacturing difficulty is low, the project construction cost is low, the waste heat of the aeration system can be effectively utilized, the internal heat distribution of the system is increased, the size and use frequency of the cooling device of the aerobic tank are reduced, and the energy saving and consumption reduction effect is remarkable.

[0029] 2. The heat exchange system of the anaerobic tank in the present application can effectively reduce the use of external steam, and is more gentle than the steam heating process, reduces the influence of instantaneous temperature difference change on microorganism strains, and the anaerobic gas-liquid heat exchange system is simple to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is the pipeline instrument flow chart of the present application;

[0031] Figure 2 is the process flow diagram of the present application;

[0032] Figure 3 is the flow chart of the heat linkage method of the present application.

[0033] In the figure, 1, an aeration system; 1.1, an aeration fan; 1.2, a gas supply main pipe; 1.3, a first temperature meter; 1.4, a first air inlet valve; 1.5, a first air inlet; 1.6, a second air inlet valve; 1.7, a second air inlet; 1.8, a third air inlet valve; 1.9, a third air inlet;

[0034] 2, an anaerobic gas-liquid heat exchange system; 2.1, an anaerobic tank; 2.2, an anaerobic gas-liquid heat exchange device; 2.3, a first air outlet; 2.4, a first air outlet valve; 2.5, a second temperature meter;

[0035] 3. The hot water heat exchange system and the hot water constant pressure water supply system; 3.1. The first hot water supply tank; 3.2. The third thermometer; 3.3. The first mixing stirrer; 3.4. The second air outlet valve; 3.5. The second air outlet; 3.6. The first water supplement inlet; 3.7. The first water supplement valve; 3.8. The first hot water valve; 3.9. The second hot water supply tank; 3.10. The fourth thermometer; 3.11. The second mixing stirrer; 3.12. The third air outlet valve; 3.13. The third air outlet; 3.14. The second water supplement inlet; 3.15. The second water supplement valve; 3.16. The second hot water valve; 3.17. The first hot water inlet; 3.18. The first constant pressure water supply pump; 3.19. The second constant pressure water supply pump; 3.20. The hot water supply main pipe; 3.21. The first liquid level meter; 3.22. The second liquid level meter; 3.23. The second hot water inlet.

[0036] 4. The aerobic aeration system; 4.1. The aerobic tank; 4.2. The fifth thermometer; 4.3. The air outlet main pipe; 4.4. The aeration device; 4.5. The sixth thermometer. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. EMBODIMENT

[0038] Please refer to the drawings in the description Figures 1-2 The technical problem to be solved in the embodiment is that the waste heat of the biochemical aeration part of the existing sewage treatment station is not utilized, the temperature control of the biochemical tank is difficult, especially in summer with high temperature and abundant water, the temperature in the biochemical tank is difficult to control, which affects the flocculation effect of activated sludge, the protozoan population, sludge settling, etc., ultimately leading to poor sludge activity and reduced degradation efficiency. On the other hand, the higher the temperature of the sewage, the lower the dissolved oxygen content in the sewage, which will lead to insufficient oxygen supply to the activated sludge and anoxic, which requires more energy consumption for aeration of the biochemical tank. Therefore, it is urgent to exchange, collect and utilize the heat at the front end of the aeration system, to intervene in advance for the stable operation of the entire sewage treatment station, effectively utilize the waste heat, and reduce the overall project investment. Therefore, a sewage biochemical system and hot water supply system heat linkage system and heat linkage method are provided, which comprises:

[0039] The aeration system 1, the anaerobic gas-liquid heat exchange system 2, the hot water heat exchange and constant pressure water supply system 3 and the aerobic aeration system 4; the aeration system 1 is in communication with the anaerobic gas-liquid heat exchange system 2 and the hot water heat exchange system at the same time, the hot water heat exchange system is in communication with the hot water constant pressure water supply system, the anaerobic gas-liquid heat exchange system 2 and the hot water heat exchange system are in communication with the aerobic aeration system 4 at the same time;

[0040] The hot water heat exchange and constant pressure water supply system 3 comprises a first hot water supply tank 3.1, a second hot water supply tank 3.9 and a hot water supply main pipe 3.20, the first hot water supply tank 3.1 and the second hot water supply tank 3.9 are in communication with the aeration system 1 at the same time, the first hot water supply tank 3.1 and the second hot water supply tank 3.9 are in communication with the aerobic aeration system 4 at the same time, and the first hot water supply tank 3.1 and the second hot water supply tank 3.9 are also in communication with the hot water supply main pipe 3.20 at the same time;

[0041] The first hot water supply tank 3.1 comprises a second air inlet 1.7, a first water supplement inlet 3.6, a second air outlet 3.5, a first hot water outlet 3.17 and a first mixing stirrer 3.3, the first mixing stirrer 3.3 is fixedly installed in the first hot water supply tank 3.1, the second air inlet 1.7 is in communication with the aeration system 1, the first water supplement inlet 3.6 is in communication with external tap water, the second air outlet 3.5 is in communication with the aerobic aeration system 4, and the first hot water outlet 3.17 is in communication with the hot water main pipe;

[0042] The second hot water supply tank 3.9 comprises a third air inlet 1.9, a second water supplement inlet 3.14, a third air outlet 3.13, a second hot water outlet 3.23 and a second stirrer 3.11, the second stirrer 3.11 is fixedly installed in the second hot water supply tank 3.9, the third air inlet 1.9 is in communication with the aeration system 1, the second water supplement inlet 3.14 is in communication with external tap water, the third air outlet 3.13 is in communication with the aerobic aeration system 4, and the second hot water outlet 3.23 is in communication with the hot water main pipe.

[0043] The aeration system 1 is an aeration fan 1.1, the aeration fan 1.1 is connected in parallel to the anaerobic gas-liquid heat exchange system 2, the second air inlet 1.7 of the first hot water supply tank 3.1 and the third air inlet 1.9 of the second hot water supply tank 3.9 through a fan air supply main pipe 1.2, and a first thermometer 1.3 is arranged on the fan air supply main pipe 1.2.

[0044] Anaerobic gas-liquid heat exchange system 2 includes anaerobic tank 2.1, the bottom of anaerobic tank 2.1 is fixedly installed with anaerobic gas-liquid heat exchange device 2.2, first air inlet 1.5 is arranged on anaerobic gas-liquid heat exchange device 2.2, first air inlet 1.5 communicates with fan gas supply main pipe 1.2 through anaerobic tank 2.1, first air inlet valve 1.4 is fixedly arranged on the pipeline between first air inlet 1.5 and fan gas supply main pipe 1.2, first air outlet 2.3 is arranged at the end of anaerobic gas-liquid heat exchange device 2.2, first air outlet 2.3 communicates with aerobic aeration system 4 through anaerobic tank 2.1, first air outlet valve 2.4 is fixedly installed on the pipeline at first air outlet 2.3, second thermometer 2.5 is fixedly arranged in anaerobic tank 2.1, the second thermometer 2.5 in the tank is interlocked with first air inlet valve 1.4, and the opening of first air inlet valve 1.4 is adjusted to maintain the temperature of anaerobic reaction tank in the appropriate interval.

[0045] Second air inlet valve 1.6 is fixedly installed on the pipeline at second air inlet 1.7, first water supplement valve 3.7 is fixedly installed on the pipeline at first water supplement port 3.6, second air outlet valve 3.4 is fixedly installed on the pipeline at second air outlet 3.5, first hot water valve 3.8 is fixedly arranged on the pipeline at first hot water port 3.17, first constant pressure water supply pump 3.18 is fixedly installed between first hot water valve 3.8 and hot water supply main pipe 3.20, first liquid level meter 3.21 and third thermometer 3.2 are fixedly installed on first hot water tank 3.1.

[0046] Third air inlet valve 1.8 is fixedly installed on the pipeline at third air inlet 1.9, second water supplement valve 3.15 is fixedly installed on the pipeline at second water supplement port 3.14, third air outlet valve 3.12 is fixedly installed on the pipeline at third air outlet 3.13, second hot water valve 3.16 is fixedly arranged on the pipeline at second hot water port 3.23, second constant pressure water supply pump 3.19 is fixedly installed between second hot water valve 3.16 and hot water supply main pipe 3.20, second liquid level meter 3.22 and fourth thermometer 3.10 are fixedly installed on second hot water tank 3.9.

[0047] First hot water tank 3.1 is supplemented with tap water through first water supplement port 3.6 according to the low position indication of first liquid level meter 3.21, and second hot water tank 3.9 is also supplemented with tap water through second water supplement port 3.14 according to the low position indication of second liquid level meter 3.22.

[0048] The aerobic aeration system 4 comprises an aerobic tank 4.1, an aeration device 4.4 fixedly installed at the bottom of the aerobic tank 4.1, and a gas outlet main pipe 4.3, the gas inlet end of which is in communication with the first gas outlet 2.3, the second gas outlet 3.5 and the third gas outlet 3.13, the gas outlet end of the gas outlet main pipe 4.3 is in communication with the aeration device 4.4, and the fifth thermometer 4.2 is fixedly installed on the gas outlet main pipe 4.3, and the sixth thermometer 4.5 is fixedly installed on the aerobic tank 4.1.

[0049] The anaerobic gas-liquid heat exchange device 2.2 is a plurality of parallelly arranged circular thin-wall stainless steel pipes.

[0050] The first heat supply water tank 3.1 and the second heat supply water tank 3.9 are the same in structure, the main material of the first heat supply water tank 3.1 is 304 stainless steel, the outer wall of the first heat supply water tank 3.1 is provided with an inwardly recessed square groove, the overall height of the inwardly recessed square groove accounts for 1 / 2 of the height of the water tank, the groove depth of the inwardly recessed square groove is greater than 1 / 20 of the tank diameter of the first heat supply water tank 3.1, a reinforced mixer is arranged at the top of the first heat supply water tank 3.1, the first mixing mixer 3.3 is fastened to the mixing support through bolts, a jacket layer is arranged outside the outer wall of the first heat supply water tank 3.1, the jacket layer is used for external heat preservation of the first heat supply water tank 3.1, and 50mm-thick glass wool is arranged outside the jacket layer for heat preservation.

[0051] The first mixing mixer 3.3 and the second mixing mixer 3.11 are the same in structure and are both low-speed mixers, the first mixing mixer 3.3 is inserted into the first heat supply water tank 3.1 by a depth of 3 / 4 of the liquid level height, the second mixing mixer 3.11 is inserted into the second heat supply water tank 3.9 by a depth of 3 / 4 of the liquid level height, the first mixing mixer is provided with three layers of blades, and the blades adopt an anchor plate type.

[0052] The horizontal height of the second gas inlet 1.7 is higher than that of the second gas outlet 3.5, and the horizontal height of the third gas inlet 1.9 is higher than that of the third gas outlet 3.13, hot air is connected with the jacket layer of the heat supply water tank through the gas inlets, hot gas enters from the upper opening and flows out from the lower opening, the outer wall of the heat supply water tank is used as a heat exchange surface to transfer part of the heat to tap water in the water tank, and the two heat supply water tanks alternately complete heat exchange and heat supply.

[0053] The pipelines and valves before the anaerobic gas-liquid heat exchange system 2 and the hot water heat exchange and constant-pressure water supply system 3 are all provided with heat preservation.

[0054] In this embodiment, the aeration fan is connected to the anaerobic gas-liquid heat exchange device 2.2, the first heat water tank 3.1 and the second heat water tank 3.9 through the fan air supply main pipe 1.2, and after the heat transfer and utilization are completed, the air is collected into the air outlet main pipe 4.3 to supply the aeration device 4.4 of the aerobic tank 4.1. The first heat water tank 3.1 and the second heat water tank 3.9 are heated to the set temperature and then delivered to each hot water point through the first constant pressure water supply pump 3.18 and the second constant pressure water supply pump 3.19.

[0055] The first thermometer 1.3 and the fifth thermometer 4.2 are used to monitor the overall heat exchange efficiency of the system, the second thermometer 2.5 is used to adjust the opening of the first air inlet valve, and the third thermometer 3.2 and the fourth thermometer 3.10 are used for automatic heat preservation of the heat water tank. The first liquid level meter 3.21 on the first heat water tank 3.1 and the second liquid level meter 3.22 on the second heat water tank 3.9 are switched by low liquid level feedback to use the heat exchange water tank.

[0056] In a specific embodiment, the first air inlet valve 1.4, the second air inlet valve 1.6, the third air inlet valve 1.8, the first air outlet valve 2.4, the second air outlet valve 3.4 and the third air outlet valve 3.12 are all electric valves, so as to realize automatic operation of the whole system.

[0057] In this embodiment, a sewage biochemical system and heat water supply system heat linkage method is also provided, which comprises the following steps:

[0058] S1: When the first heat water tank and the second heat water tank are filled with tap water, the first air inlet valve and the first air outlet valve of the anaerobic tank, the second air inlet valve and the second air outlet valve of the first heat water tank are opened;

[0059] S2: The aeration fan is opened, and the hot gas source flows through the anaerobic gas-liquid heat exchange device and the heat exchange water tank jacket layer through the pipeline. Because the gas temperature is high and the liquid temperature is low, part of the heat carried by the gas is transferred to the liquid. After the gas source is heat exchanged, it enters the aeration system. It should be noted that the first air inlet valve of the anaerobic gas-liquid heat exchange device is preferably an adjusting valve, and the opening of the first air inlet valve is adjusted according to the second thermometer;

[0060] S3: When the temperature of the first heat water tank reaches the set value, the third air inlet valve and the third air outlet valve of the second heat water tank are opened;

[0061] S4: The second air inlet valve and the second air outlet valve of the first heat water tank are closed, and the first hot water valve of the heat water tank is opened;

[0062] S5: The hot water constant pressure water supply system automatically operates according to the pressure of the system self-contained pressure stabilizing tank pressure gauge. When the pressure is lower than the set value, the first constant pressure water supply pump or the second constant pressure water supply pump is opened. When the pressure gauge reaches the set high pressure value, the first constant pressure water supply pump or the second constant pressure water supply pump is automatically closed;

[0063] S6: After the first water tank first liquid level meter reaches the set low value, open the second hot water valve of the first water tank, the second air inlet valve and the second air outlet valve, then close the first hot water valve of the first water tank, the third air inlet valve and the third air outlet valve of the second water tank, open the first water supplement valve, and close the water supplement valve after the first liquid level meter reaches the set high value.

[0064] S7: After the second water tank second liquid level meter reaches the set low value, open the first hot water valve, the third air inlet valve and the third air outlet valve of the first water tank, then close the second hot water valve, the second air inlet valve and the second air outlet valve of the first water tank, open the second water supplement valve, and close the water supplement valve after the second liquid level meter reaches the set high value. Return to S6 operation. In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0065] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited, the above-mentioned terms in the present application can be understood according to the specific meaning in the specific situation by those skilled in the art.

[0066] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A heat linkage system for a sewage biochemical system and a hot water supply system, characterized in that: include: an aeration system, an anaerobic liquid heat exchange system, a hot water heat exchange system, a hot water constant pressure water supply system and an aerobic aeration system; the aeration system is simultaneously connected to the anaerobic liquid heat exchange system and the hot water heat exchange system, the hot water heat exchange system is connected to the hot water constant pressure water supply system, the anaerobic liquid heat exchange system and the hot water heat exchange system are simultaneously connected to the aerobic aeration system; the hot water heat exchange system includes: a first hot water supply tank and a second hot water supply tank, the hot water constant pressure water supply system includes a hot water supply main, the first hot water supply tank and the second hot water supply tank are simultaneously connected to the aeration system, the first hot water supply tank and the second hot water supply tank are simultaneously connected to the aerobic aeration system, the first hot water supply tank and the second hot water supply tank are also simultaneously connected to the hot water supply main; the first hot water supply tank The first mixing mixer is fixedly installed in the first hot water supply tank, the second air inlet is connected to the aeration system, the first water inlet is connected to the external tap water, the second air outlet is connected to the aerobic aeration system, and the first hot water inlet is connected to the hot water main; the second hot water supply tank includes a third air inlet, a second water inlet, a third air outlet, a second hot water inlet and a second mixing mixer, the second mixing mixer is fixedly installed in the second hot water supply tank, the third air inlet is connected to the aeration system, the second water inlet is connected to the external tap water, the third air outlet is connected to the aerobic aeration system, and the second hot water inlet is connected to the hot water main; The aeration system is an aeration fan, which is connected in parallel to the anaerobic liquid heat exchange system, the second air inlet of the first hot water supply tank, and the third air inlet of the second hot water supply tank through a fan air supply main pipe, and a first thermometer is provided on the fan air supply main pipe; The anaerobic gas-liquid heat exchange system includes an anaerobic tank, an anaerobic gas-liquid heat exchange device is fixedly installed at the bottom of the anaerobic tank, a first air inlet is provided on the anaerobic gas-liquid heat exchange device, the first air inlet passes through the anaerobic tank and is connected to the fan air supply main pipe, a first air inlet valve is fixedly provided on the pipeline between the first air inlet and the fan air supply main pipe, a first air outlet is provided at the end of the anaerobic gas-liquid heat exchange device away from the first air inlet, the first air outlet passes through the anaerobic tank and is connected to the aerobic aeration system, a first air outlet valve is fixedly installed on the pipeline at the first air outlet, a second thermometer is fixedly installed in the anaerobic tank, and the anaerobic gas-liquid heat exchange device is a plurality of circular thin-walled stainless steel pipes arranged in parallel.

2. The heat linkage system of sewage biochemical system and hot water supply system according to claim 1 is characterized in that: A second air inlet valve is fixedly installed on the pipe at the second air inlet, a first water supply valve is fixedly installed on the pipe at the first water supply port, a second air outlet valve is fixedly installed on the pipe at the second air outlet, a first hot water valve is fixedly provided on the pipe at the first hot water outlet, a constant pressure water supply pump is fixedly installed between the first hot water valve and the hot water supply main pipe, and a first liquid level gauge and a third thermometer are fixedly installed on the first hot water supply tank.

3. The heat linkage system of sewage biochemical system and hot water supply system according to claim 2 is characterized in that: A third air inlet valve is fixedly installed on the pipe at the third air inlet, a second water supply valve is fixedly installed on the pipe at the second water supply port, a third air outlet valve is fixedly installed on the pipe at the third air outlet, a second hot water valve is fixedly provided on the pipe at the second hot water outlet, a constant pressure water supply pump is fixedly installed between the second hot water valve and the hot water supply main pipe, and a second liquid level gauge and a fourth thermometer are fixedly installed on the second hot water supply tank.

4. The heat linkage system of sewage biochemical system and hot water supply system according to claim 3 is characterized in that: The aerobic aeration system includes an aerobic tank, an aeration device is fixedly installed at the bottom of the aerobic tank, and also includes an air outlet main pipe, the air inlet end of the air outlet main pipe is connected to the first air outlet, the second air outlet and the third air outlet at the same time, the air outlet end of the air outlet main pipe is connected to the aeration device, a fifth thermometer is fixedly installed on the air outlet main pipe, and a sixth thermometer is fixedly installed on the aerobic tank.

5. The heat linkage system of sewage biochemical system and hot water supply system according to claim 4 is characterized in that: The first hot water supply tank and the second hot water supply tank have the same structure. The main material of the first hot water supply tank is 304 stainless steel. The outer wall of the first hot water supply tank is provided with an inward-concave square groove. The groove depth of the inward-concave square groove is greater than 1 / 20 of the tank diameter of the first hot water supply tank. The outer wall of the first hot water supply tank is provided with a jacket layer. The inner layer of the jacket layer is used for gas-liquid heat exchange, and the outermost layer is used for external insulation of the first hot water supply tank.

6. The heat linkage system of sewage biochemical system and hot water supply system according to claim 5 is characterized in that: The first mixer and the second mixer are both low-speed mixers. The first mixer is inserted into the first hot water supply tank to a depth of 3 / 4 of the liquid level, and the second mixer is inserted into the second hot water supply tank to a depth of 3 / 4 of the liquid level.

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