Sewage biochemical system heat utilization and plant hot water supply linkage system

Abstract

The utility model relates to a sewage biochemical system heat utilization and plant hot water supply linkage system, which relates to the technical field of sewage treatment, and comprises an aeration fan, a biochemical pool, an anaerobic pool, a first heat supply water tank and a second heat supply water tank, a heat exchange pipe is arranged in the anaerobic pool, a first heat insulation box is sleeved on the first heat supply water tank, and a second heat insulation box is sleeved on the second heat supply water tank. The second heat supply water tank is sleeved with a second heat preservation box, the input end of the heat exchange pipe, the input end of the first heat preservation box and the input end of the second heat preservation box are jointly communicated with an air supply main pipe, and the air supply main pipe is communicated with the output end of an aeration fan; the output end of the heat exchange pipe, the output end of the first heat preservation box and the output end of the second heat preservation box are jointly communicated with an air outlet main pipe, the air outlet main pipe is communicated with an aeration device, and the aeration device is located in the biochemical pool. The method has the effect of reducing the sewage biochemical treatment energy consumption.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially is related to a sewage biochemical system heat utilization and plant area hot water supply linkage system. BACKGROUND

[0002] Now in sewage treatment, the power consumption of aeration system accounts for 40-60% of total sewage station power consumption, wherein a part of electric energy is converted into heat energy loss, and the heat generated by equipment and pipeline is transferred into the biochemical tank, causing the temperature of biochemical system to rise, which is not conducive to the reproduction of microbial flora, and the biochemical mixed liquor must be cooled by an additional cooling water system.

[0003] The higher the temperature in the biochemical tank, the lower the dissolved oxygen content in the sewage, and the more likely it is to appear active sludge oxygen deficiency and anoxic condition, which makes the sludge activity poor, reduces the degradation efficiency of active sludge, and affects the effects of active sludge flocculation and sludge sedimentation.

[0004] Therefore, when the temperature in the biochemical tank rises, not only more cooling water is needed to cool the biochemical mixed liquor, but also more energy consumption is needed for the aeration of the biochemical tank to ensure the efficiency and quality of sewage treatment. SUMMARY

[0005] In order to reduce the energy consumption of sewage biochemical treatment, the application provides a sewage biochemical system heat utilization and plant area hot water supply linkage system.

[0006] The sewage biochemical system heat utilization and plant area hot water supply linkage system provided by the application adopts the following technical scheme:

[0007] A sewage biochemical system heat utilization and plant area hot water supply linkage system, comprising an aeration fan and a biochemical tank, further comprising an anaerobic tank, a first hot water supply tank and a second hot water supply tank, a heat exchange pipe is arranged in the anaerobic tank, a first heat preservation box is sleeved on the first hot water supply tank, a second heat preservation box is sleeved on the second hot water supply tank, a gas supply main pipe is commonly connected on the input end of the heat exchange pipe, the input end of the first heat preservation box and the input end of the second heat preservation box, the gas supply main pipe and the output end of the aeration fan are in communication with each other, an air outlet main pipe is commonly connected on the output end of the heat exchange pipe, the output end of the first heat preservation box and the output end of the second heat preservation box, an aeration device is connected on the air outlet main pipe, and the aeration device is located in the biochemical tank.

[0008] By adopting the technical scheme, after the aeration fan is started, the hot air generated by the aeration fan enters the heat exchange pipe, the first heat preservation box and the second heat preservation box through the gas supply main pipe, the hot air in the heat exchange pipe exchanges heat with the liquid in the anaerobic tank, so that the hot air in the heat exchange pipe is cooled, the liquid in the anaerobic tank is heated, the hot air in the first heat preservation box exchanges heat with the liquid in the first heat water tank, so that the hot air in the first heat preservation box is cooled, the liquid in the first heat water tank is heated, the hot air in the second heat preservation box exchanges heat with the liquid in the second heat water tank, so that the hot air in the second heat preservation box is cooled, the liquid in the second heat water tank is heated, and the cooled gas in the heat exchange pipe, the first heat preservation box and the second heat preservation box flows into the aeration device through the gas outlet main pipe. The aeration device aerates the biochemical tank. Since the cooled gas is used in the aeration device, the temperature of the biochemical tank is not easy to rise, on the one hand, the use of cooling water for cooling treatment is reduced, on the other hand, the use of more energy consumption for aeration of the biochemical tank is reduced, and the effect of reducing the energy consumption of sewage biochemical treatment is achieved.

[0009] Preferably, a first thermometer is arranged on the gas supply main pipe, a fifth thermometer is arranged on the gas outlet main pipe, and a sixth thermometer is arranged on the biochemical tank.

[0010] By adopting the technical scheme, the first thermometer detects the temperature in the gas supply main pipe, the fifth thermometer detects the temperature of the gas outlet main pipe, and the sixth thermometer detects the temperature of the biochemical tank, so as to monitor the heat exchange efficiency of the hot air.

[0011] Preferably, a first gas inlet pipe is arranged in communication between the gas supply main pipe and the heat exchange pipe, a first gas inlet valve is arranged on the first gas inlet pipe, a first gas outlet pipe is arranged in communication between the gas outlet main pipe and the heat exchange pipe, a first gas outlet valve is arranged on the first gas outlet pipe, and a second thermometer is arranged on the anaerobic tank.

[0012] By adopting the technical scheme, the second thermometer detects the temperature inside the anaerobic tank, the opening degree of the first gas inlet valve is controlled according to the temperature of the anaerobic tank, so as to achieve the effect of adjusting the temperature of the anaerobic tank, reduce the use of external steam of the anaerobic tank, achieve the effect of reducing energy consumption, and the way of heat exchange between the hot air and the anaerobic tank is more gentle than the way of directly heating the anaerobic tank by steam, and the influence of instantaneous temperature difference change on the microbial strains is reduced.

[0013] Preferably, a first hot water pipe is arranged in communication on the first heat water tank, a first hot water valve is arranged on the first hot water pipe, a first constant pressure water supply pump is arranged in communication on the first hot water pipe, a second hot water pipe is arranged in communication on the second heat water tank, a second hot water valve is arranged on the second hot water pipe, and a second constant pressure water supply pump is arranged in communication on the second hot water pipe. The first constant pressure water supply pump and the second constant pressure water supply pump are commonly connected to a hot water supply main pipe.

[0014] By adopting the technical scheme, when the first constant pressure water supply pump starts and the first hot water valve opens, hot water in the first hot water supply tank is discharged through the hot water supply main pipe, and when the second constant pressure water supply pump starts and the second hot water valve opens, hot water in the second hot water supply tank is discharged through the hot water supply main pipe, thereby achieving the effect of heating tap water by using the heat energy of the aeration fan.

[0015] Preferably, a first liquid level gauge is arranged on the first hot water supply tank, a first water replenishing pipe is arranged in communication on the first hot water supply tank, a first water replenishing valve is arranged on the first water replenishing pipe, a second liquid level gauge is arranged on the second hot water supply tank, a second water replenishing pipe is arranged in communication on the second hot water supply tank, and a second water replenishing valve is arranged on the second water replenishing pipe.

[0016] By adopting the technical scheme, the first liquid level gauge detects the liquid level height in the first hot water supply tank, when the liquid level in the first hot water supply tank is a set low liquid level, the first constant pressure water supply pump stops and the first hot water valve closes, the first water replenishing valve opens, tap water enters the first hot water supply tank through the first water replenishing pipe, until the liquid level in the first hot water supply tank is a set high liquid level, the first water replenishing valve closes, the second liquid level gauge detects the liquid level height in the second hot water supply tank, when the liquid level in the second hot water supply tank is a set low liquid level, the second constant pressure water supply pump stops and the second hot water valve closes, the second water replenishing valve opens, tap water enters the second hot water supply tank through the second water replenishing pipe, until the liquid level in the second hot water supply tank is a set high liquid level, the second water replenishing valve closes, thereby achieving the effect of automatically replenishing tap water to the first hot water supply tank and the second hot water supply tank.

[0017] Preferably, a second air inlet pipe is arranged in communication between the air supply main pipe and the first heat preservation tank, a second air inlet valve is arranged on the second air inlet pipe, a second air outlet pipe is arranged in communication between the air outlet main pipe and the first heat preservation tank, a second air outlet valve is arranged on the second air outlet pipe, and a third temperature gauge is arranged on the first hot water supply tank.

[0018] By adopting the technical scheme, the third temperature gauge detects the temperature in the first hot water supply tank, when tap water in the first hot water supply tank is heated to a set temperature, the first constant pressure water supply pump starts and the first hot water valve opens, the second air inlet valve and the second air outlet valve are closed, when the liquid level in the first hot water supply tank is a set low liquid level, the first constant pressure water supply pump stops and the first hot water valve closes, the first water replenishing valve opens, tap water enters the first hot water supply tank through the first water replenishing pipe, until the liquid level in the first hot water supply tank is a set high liquid level, the first water replenishing valve closes, and the second air inlet valve and the second air outlet valve open, thereby achieving the effect of controlling the opening degree of the second air inlet valve according to the internal temperature and the liquid level of the first hot water supply tank.

[0019] Preferably, a first spiral groove is formed on the outer wall of the first hot water supply tank, the bottom end of the first spiral groove is in communication with the second air inlet pipe, and the top end of the first spiral groove is in communication with the second air outlet pipe.

[0020] By adopting the technical scheme, the hot gas flows along the first spiral groove, and part of the heat is transferred to the tap water in the outer wall of the first heat supply water tank by taking the outer wall of the first heat supply water tank as a heat exchange surface. On one hand, the first spiral groove increases the contact area between the outer wall of the first heat supply water tank and the hot gas, and on the other hand, the hot gas flows from the bottom end of the first spiral groove to the top end of the first spiral groove, thereby prolonging the flow path of the hot gas, and the heat exchange efficiency of the hot gas and the tap water is improved.

[0021] Preferably, a third air inlet pipe is arranged in communication between the air supply main pipe and the second heat preservation tank, a third air inlet valve is arranged on the third air inlet pipe, a third air outlet pipe is arranged in communication between the air outlet main pipe and the second heat preservation tank, a third air outlet valve is arranged on the third air outlet pipe, and a fourth thermometer is arranged on the second heat supply water tank.

[0022] By adopting the technical scheme, the fourth thermometer detects the temperature in the second heat supply water tank. When the tap water in the second heat supply water tank is heated to a set temperature, the second constant pressure water supply pump is started and the second hot water valve is opened, and the third air inlet valve and the third air outlet valve are closed. When the liquid level in the second heat supply water tank is a set low liquid level, the second constant pressure water supply pump is stopped and the second hot water valve is closed, and the second water supplement valve is opened. The tap water enters the second heat supply water tank through the second water supplement pipe until the liquid level in the second heat supply water tank is a set high liquid level, the second water supplement valve is closed, and the third air inlet valve and the third air outlet valve are opened. The effect of controlling the opening degree of the third air inlet valve according to the internal temperature and the liquid level of the second heat supply water tank is realized.

[0023] Preferably, a second spiral groove is arranged on the outer wall of the second heat supply water tank, the bottom end of the second spiral groove is in communication with the third air inlet pipe, and the top end of the second spiral groove is in communication with the third air outlet pipe.

[0024] By adopting the technical scheme, the hot gas flows along the second spiral groove, and part of the heat is transferred to the tap water in the outer wall of the second heat supply water tank by taking the outer wall of the second heat supply water tank as a heat exchange surface. On one hand, the second spiral groove increases the contact area between the outer wall of the second heat supply water tank and the hot gas, and on the other hand, the hot gas flows from the bottom end of the second spiral groove to the top end of the second spiral groove, thereby prolonging the flow path of the hot gas, and the heat exchange efficiency of the hot gas and the tap water is improved.

[0025] Preferably, a first mixing stirrer is arranged in the first heat supply water tank, and a second mixing stirrer is arranged in the second heat supply water tank.

[0026] By adopting the technical scheme, the first mixing stirrer runs to drive the tap water in the first heat supply water tank to flow, so that the tap water in the first heat supply water tank is uniformly heated. The second mixing stirrer runs to drive the tap water in the second heat supply water tank to flow, so that the tap water in the second heat supply water tank is uniformly heated.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. By setting the aeration fan, biochemical tank, anaerobic tank, first hot water supply tank, second hot water supply tank, heat exchange pipe, first heat preservation tank, second heat preservation tank, gas supply main pipe, gas outlet main pipe and aeration device, the temperature of the biochemical tank is not easily raised, on the one hand, reducing the use of cooling water for cooling treatment, on the other hand, reducing the use of more energy consumption for biochemical tank aeration, realizing the effect of reducing the energy consumption of sewage biochemical treatment;

[0029] 2. By setting the first air inlet pipe, the first air inlet valve, the first air outlet pipe, the first air outlet valve and the second thermometer, the effect of adjusting the temperature of the anaerobic tank is realized, the use of external steam of the anaerobic tank is reduced, the effect of reducing energy consumption is realized, and the heat exchange mode of hot gas and anaerobic tank is more gentle than the mode of directly heating the anaerobic tank with steam, reducing the influence of instantaneous temperature difference change on microbial strains;

[0030] 3. By setting the first spiral groove and the second spiral groove, the heat exchange efficiency of hot gas and tap water is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic diagram of a sewage biochemical system heat utilization and plant heat water supply linkage system in an embodiment of the present application.

[0032] Figure 2 is a schematic diagram of the connection relationship between the biochemical tank and the gas outlet main pipe in an embodiment of the present application.

[0033] Figure 3 is a schematic diagram of the connection relationship between the anaerobic tank and the gas supply main pipe in an embodiment of the present application.

[0034] Figure 4 is a schematic diagram of the position relationship between the first hot water supply tank and the first heat preservation tank in an embodiment of the present application.

[0035] Figure 5 is a schematic diagram of the position relationship between the second hot water supply tank and the second heat preservation tank in an embodiment of the present application.

[0036] Explanation of reference signs: 1, aeration fan; 2, biochemical tank; 21, aeration device; 22, sixth thermometer; 3, anaerobic tank; 31, heat exchange pipe; 32, first air inlet pipe; 321, first air inlet valve; 33, first air outlet pipe; 331, first air outlet valve; 34, second thermometer; 4, first hot water supply tank; 41, first heat preservation tank; 411, first helical groove; 42, first liquid level meter; 43, first water supplement pipe; 431, first water supplement valve; 44, third thermometer; 45, second air inlet pipe; 451, second air inlet valve; 46, second air outlet pipe; 461, second air outlet valve; 47, first mixing stirrer; 5, second hot water supply tank; 51, second heat preservation tank; 511, second helical groove; 52, second liquid level meter; 53, second water supplement pipe; 531, second water supplement valve; 54, fourth thermometer; 55, third air inlet pipe; 551, third air inlet valve; 56, third air outlet pipe; 561, third air outlet valve; 57, second mixing stirrer; 6, air supply main pipe; 61, first thermometer; 7, air outlet main pipe; 71, fifth thermometer; 8, hot water supply main pipe; 81, first hot water pipe; 811, first hot water valve; 812, first constant pressure water supply pump; 82, second hot water pipe; 821, second hot water valve; 822, second constant pressure water supply pump. DETAILED DESCRIPTION

[0037] The following will be described in detail in combination with the accompanying drawings. Figures 1-5 The present application is further described in detail.

[0038] The embodiments of the present application disclose a sewage biochemical system heat utilization and plant area hot water supply linkage system. Referring to the drawings Figures 1 to 5, including aeration fan 1, biochemical pool 2, anaerobic tank 3, first hot water tank 4 and second hot water tank 5. A plurality of heat exchange pipes 31 of stainless steel material are installed in the anaerobic tank 3, a first heat preservation box 41 is sleeved on the first hot water tank 4, the outer wall of the first heat preservation box 41 is wrapped with glass wool with a thickness of 50mm, a second heat preservation box 51 is sleeved on the second hot water tank 5, and the outer wall of the second heat preservation box 51 is wrapped with glass wool with a thickness of 50mm. The input end of the heat exchange pipe 31, the input end of the first heat preservation box 41 and the input end of the second heat preservation box 51 are commonly connected to the gas supply main pipe 6, and the gas supply main pipe 6 is in communication with the output end of the aeration fan 1. The output end of the heat exchange pipe 31, the output end of the first heat preservation box 41 and the output end of the second heat preservation box 51 are commonly connected to the gas outlet main pipe 7, and the gas outlet main pipe 7 is connected to the aeration device 21, and the aeration device 21 is located in the biochemical pool 2. After the aeration fan 1 is started, the hot air generated by the aeration fan 1 enters the heat exchange pipe 31, the first heat preservation box 41 and the second heat preservation box 51 through the gas supply main pipe 6, the hot air in the heat exchange pipe 31 exchanges heat with the liquid in the anaerobic tank, thereby cooling the hot air in the heat exchange pipe 31 and heating the liquid in the anaerobic tank 3; the hot air in the first heat preservation box 41 exchanges heat with the liquid in the first hot water tank 4, thereby cooling the hot air in the first heat preservation box 41 and heating the liquid in the first hot water tank 4; the hot air in the second heat preservation box 51 exchanges heat with the liquid in the second hot water tank 5, thereby cooling the hot air in the second heat preservation box 51 and heating the liquid in the second hot water tank 5. The cooled gas in the heat exchange pipe 31, the first heat preservation box 41 and the second heat preservation box 51 flows into the aeration device 21 through the gas outlet main pipe 7, and the aeration device 21 aerates the biochemical pool 2. Because the cooled gas is used in the aeration device 21, the temperature of the biochemical pool 2 is not easily increased, which reduces the use of cooling water for cooling treatment and reduces the use of more energy for aeration of the biochemical pool 2, thereby achieving the effect of reducing the energy consumption of the biochemical treatment of sewage.

[0039] In order to monitor the heat exchange efficiency of the hot gas, with reference to Figures 1 to 3 , a first thermometer 61 is installed on the gas supply main pipe 6 to detect the temperature in the gas supply main pipe 6. A fifth thermometer 71 is installed on the gas outlet main pipe 7 to detect the temperature of the gas outlet main pipe 7. A sixth thermometer 22 is installed on the biochemical pool 2 to detect the temperature of the biochemical pool 2.

[0040] In order to adjust the temperature of the anaerobic tank 3, with reference to Figures 1 to 3, the gas supply main pipe 6 and the heat exchange pipe 31 are communicated by a first air inlet pipe 32, the first air inlet valve 321 is installed on the first air inlet pipe 32, and the first air inlet valve 321 is an adjusting valve. The gas outlet pipe 7 and the heat exchange pipe are communicated by a first air outlet pipe 33, and the first air outlet valve 331 is installed on the first air outlet pipe 33. The first air outlet valve 331 is an electromagnetic valve. The anaerobic tank 3 is provided with a second thermometer 34, and the second thermometer 34 detects the temperature inside the anaerobic tank 3. The opening of the first air inlet valve 321 is controlled according to the temperature of the anaerobic tank 3, so as to realize the effect of adjusting the temperature of the anaerobic tank 3. The heat energy generated by the aeration fan 1 is used to heat the anaerobic tank 3, so as to reduce the use of steam connected to the anaerobic tank 3, and realize the effect of reducing energy consumption. The heat exchange mode of the heat gas and the anaerobic tank 3 is more gentle than the mode of directly heating the anaerobic tank 3 by steam, and the influence of the instantaneous temperature difference change on the microbial strains is reduced.

[0041] In order to realize the automatic switching effect of the first heat supply water tank 4 and the second heat supply water tank 5, refer to Figures 1 to 5 , the gas supply main pipe 6 and the first heat preservation box 41 are communicated by a second air inlet pipe 45, and the second air inlet valve 451 is installed on the second air inlet pipe 45. The second air inlet valve 451 is an adjusting valve. The gas outlet pipe 7 and the first heat preservation box 41 are communicated by a second air outlet pipe 46, and the second air outlet valve 461 is installed on the second air outlet pipe 46. The second air outlet valve 461 is an electromagnetic valve. The first heat supply water tank 4 is provided with a third thermometer 44, and the third thermometer 44 detects the temperature in the first heat supply water tank 4. The first heat supply water tank 4 is provided with a first liquid level meter 42, and the first liquid level meter 42 detects the liquid level height in the first heat supply water tank 4. The first heat supply water tank 4 is communicated by a first water supplement pipe 43, and the first water supplement valve 431 is installed on the first water supplement pipe 43. The first water supplement valve 431 is an electromagnetic valve.

[0042] Refer to Figures 1 to 5 , the gas supply main pipe 6 and the second heat preservation box 51 are communicated by a third air inlet pipe 55, and the third air inlet valve 551 is installed on the third air inlet pipe 55. The third air inlet valve 551 is an adjusting valve. The gas outlet pipe 7 and the second heat preservation box 51 are communicated by a third air outlet pipe 56, and the third air outlet valve 561 is installed on the third air outlet pipe 56. The third air outlet valve 561 is an electromagnetic valve. The second heat supply water tank 5 is provided with a fourth thermometer 54, and the fourth thermometer 54 detects the temperature in the second heat supply water tank 5. The second heat supply water tank 5 is provided with a second liquid level meter 52, and the second liquid level meter 52 detects the liquid level height in the second heat supply water tank 5. The second heat supply water tank 5 is communicated by a second water supplement pipe 53, and the second water supplement valve 531 is installed on the second water supplement pipe 53. The second water supplement valve 531 is an electromagnetic valve.

[0043] Refer to Figures 1 to 5The first hot water tank 4 is connected with the first hot water pipe 81, and the first hot water valve 811 is installed on the first hot water pipe 81. The second hot water tank 5 is connected with the second hot water pipe 82, and the second hot water valve 821 is installed on the second hot water pipe 82. The first constant pressure water supply pump 812 is connected with the first hot water pipe 81, and the second constant pressure water supply pump 822 is connected with the second hot water pipe 82. The hot water supply main pipe 8 is connected with the first constant pressure water supply pump 812 and the second constant pressure water supply pump 822.

[0044] Referring to Figures 1 to 5 When the tap water in the first hot water tank 4 is heated to the set temperature, the first constant pressure water supply pump 812 is started and the first hot water valve 811 is opened. The second inlet valve 451 and the second outlet valve 461 are closed. When the liquid level in the first hot water tank 4 is set to the low liquid level, the first constant pressure water supply pump 812 is stopped and the first hot water valve 811 is closed. The first water supplement valve 431 is opened, and the tap water enters the first hot water tank 4 through the first water supplement pipe 43. Until the liquid level in the first hot water tank 4 is set to the high liquid level, the first water supplement valve 431 is closed, and the second inlet valve 451 and the second outlet valve 461 are opened. The effect of controlling the opening degree of the second inlet valve 451 according to the temperature and liquid level inside the first hot water tank 4 is realized. When the tap water in the second hot water tank 5 is heated to the set temperature, the second constant pressure water supply pump 822 is started and the second hot water valve 821 is opened. The third inlet valve 551 and the third outlet valve 561 are closed. When the liquid level in the second hot water tank 5 is set to the low liquid level, the second constant pressure water supply pump 822 is stopped and the second hot water valve 821 is closed. The second water supplement valve 531 is opened, and the tap water enters the second hot water tank 5 through the second water supplement pipe 53. Until the liquid level in the second hot water tank 5 is set to the high liquid level, the second water supplement valve 531 is closed, and the third inlet valve 551 and the third outlet valve 561 are opened. The effect of controlling the opening degree of the third inlet valve 551 according to the temperature and liquid level inside the second hot water tank 5 is realized. When the first hot water tank 4 is heated, the second hot water tank 5 is drained first and then supplemented with water. When the second hot water tank 5 is heated, the first hot water tank 4 is drained first and then supplemented with water. The first heat exchange tank and the second heat exchange tank are alternately connected with hot air.

[0045] In order to improve the heat exchange efficiency of hot air and tap water, referring to Figure 4 and Figure 5, the first spiral groove 411 bottom end and the second air inlet pipe 45 intercommunication, the first spiral groove 411 top end and the second air outlet pipe 46 intercommunication. Hot gas flows along the first spiral groove 411, with the first heat supply tank 4 outer wall as the heat exchange surface to transfer part of the heat to the first heat supply tank 4 outer wall in the tap water. On the one hand, the first spiral groove 411 increases the contact area of the first heat supply tank 4 outer wall and hot gas, on the other hand, the hot gas flows from the first spiral groove 411 bottom end to the first spiral groove 411 top end, prolongs the hot gas flow path, thereby improving the heat exchange efficiency of hot gas and tap water. The second heat supply tank 5 outer wall is provided with a second spiral groove 511, the second spiral groove 511 bottom end and the third air inlet pipe 55 intercommunication, the second spiral groove 511 top end and the third air outlet pipe 56 intercommunication. Hot gas flows along the second spiral groove 511, with the second heat supply tank 5 outer wall as the heat exchange surface to transfer part of the heat to the second heat supply tank 5 outer wall in the tap water. On the one hand, the second spiral groove 511 increases the contact area of the second heat supply tank 5 outer wall and hot gas, on the other hand, the hot gas flows from the second spiral groove 511 bottom end to the second spiral groove 511 top end, prolongs the hot gas flow path, thereby improving the heat exchange efficiency of hot gas and tap water. The first heat supply tank 4 is provided with a first mixing stirrer 47, and the second heat supply tank 5 is provided with a second mixing stirrer 57. The first mixing stirrer 47 runs to drive the tap water in the first heat supply tank 4 to flow, so that the tap water in the first heat supply tank 4 is uniformly heated. The second mixing stirrer 57 runs to drive the tap water in the second heat supply tank 5 to flow, so that the tap water in the second heat supply tank 5 is uniformly heated.

[0046] The implementation principle of the wastewater biochemical system heat utilization and plant hot water supply linkage system of the embodiment of the application is as follows: after the aeration fan 1 is started, the hot air generated by the aeration fan 1 enters the heat exchange pipe 31, the first heat preservation box 41 and the second heat preservation box 51 through the air supply main pipe 6, the hot air in the heat exchange pipe 31 exchanges heat with the liquid in the anaerobic tank, so that the hot air in the heat exchange pipe 31 is cooled and the liquid in the anaerobic tank 3 is heated; the hot air in the first heat preservation box 41 exchanges heat with the liquid of the first heat supply tank 4, so that the hot air in the first heat preservation box 41 is cooled and the liquid in the first heat supply tank 4 is heated; the hot air in the second heat preservation box 51 exchanges heat with the liquid of the second heat supply tank 5, so that the hot air in the second heat preservation box 51 is cooled and the liquid in the second heat supply tank 5 is heated. The cooled gas in the heat exchange pipe 31, the first heat preservation box 41 and the second heat preservation box 51 flows into the aeration device 21 through the air outlet main pipe 7, and the aeration device 21 aerates the biochemical tank 2. Since the cooled gas is used in the aeration device 21, the temperature of the biochemical tank 2 is not easy to rise, on the one hand, the use of cooling water for cooling treatment is reduced, on the other hand, the use of more energy consumption for aeration of the biochemical tank 2 is reduced, and the effect of reducing the energy consumption of wastewater biochemical treatment is achieved.

[0047] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A sewage biochemical system heat utilization and plant area hot water supply linkage system, comprising an aeration fan (1) and a biochemical tank (2), characterized in that: It also includes anaerobic tank (3), the first hot water tank (4) and the second hot water tank (5), the heat exchange pipe (31) is provided in the anaerobic tank (3), the first hot water tank (4) is sleeved with the first insulation box (41), the second hot water tank (5) is sleeved with the second insulation box (51), the input end of the heat exchange pipe (31), the input end of the first insulation box (41) and the input end of the second insulation box (51) are jointly communicated with the gas supply main pipe (6), the gas supply main pipe (6) and the output end of the aeration fan (1) are communicated with each other, the output end of the heat exchange pipe (31), the output end of the first insulation box (41) and the output end of the second insulation box (51) are jointly communicated with the gas outlet main pipe (7), the gas outlet main pipe (7) is communicated with the aeration device (21), and the aeration device (21) is located in the biochemical tank (2); The first spiral groove (411) is formed in the outer wall of the first hot water tank (4), the bottom end of the first spiral groove (411) is communicated with the gas supply main pipe (6), and the top end of the first spiral groove (411) is communicated with the gas outlet main pipe (7); The second spiral groove (511) is formed in the outer wall of the second hot water tank (5), the bottom end of the second spiral groove (511) is communicated with the gas supply main pipe (6), and the top end of the second spiral groove (511) is communicated with the gas outlet main pipe (7).

2. The system according to claim 1, wherein the system is characterized in that: The first thermometer (61) is arranged on the gas supply main pipe (6), the fifth thermometer (71) is arranged on the gas outlet main pipe (7), and the sixth thermometer (22) is arranged on the biochemical tank (2).

3. The system according to claim 1, wherein the system is characterized in that: The first air inlet pipe (32) is arranged between the gas supply main pipe (6) and the heat exchange pipe (31), the first air inlet valve (321) is arranged on the first air inlet pipe (32), the first air outlet pipe (33) is arranged between the gas outlet main pipe (7) and the heat exchange pipe (31), the first air outlet valve (331) is arranged on the first air outlet pipe (33), and the second thermometer (34) is arranged on the anaerobic tank (3).

4. The system according to claim 1, wherein the system is characterized in that: The first hot water pipe (81) is arranged on the first hot water tank (4), the first hot water valve (811) is arranged on the first hot water pipe (81), the first constant pressure water supply pump (812) is arranged on the first hot water pipe (81), the second hot water pipe (82) is arranged on the second hot water tank (5), the second hot water valve (821) is arranged on the second hot water pipe (82), the second constant pressure water supply pump (822) is arranged on the second hot water pipe (82), and the hot water supply main pipe (8) is jointly communicated with the first constant pressure water supply pump (812) and the second constant pressure water supply pump (822).

5. The system according to claim 4, wherein the system is characterized in that: The first liquid level meter (42) is arranged on the first hot water tank (4), the first water replenishing pipe (43) is arranged on the first hot water tank (4), the first water replenishing valve (431) is arranged on the first water replenishing pipe (43), the second liquid level meter (52) is arranged on the second hot water tank (5), the second water replenishing pipe (53) is arranged on the second hot water tank (5), and the second water replenishing valve (531) is arranged on the second water replenishing pipe (53).

6. The system according to claim 5, wherein the system further comprises a heat exchanger. The second air inlet pipe (45) is arranged in communication between the air supply main pipe (6) and the first heat preservation box (41), the second air inlet valve (451) is arranged on the second air inlet pipe (45), the second air outlet pipe (46) is arranged in communication between the air outlet main pipe (7) and the first heat preservation box (41), the second air outlet valve (461) is arranged on the second air outlet pipe (46), the third thermometer (44) is arranged on the first hot water supply tank (4), the bottom end of the first spiral groove (411) is in mutual communication with the second air inlet pipe (45), and the top end of the first spiral groove (411) is in mutual communication with the second air outlet pipe (46).

7. The system according to claim 5, wherein the system further comprises a heat exchanger. The third air inlet pipe (55) is arranged in communication between the air supply main pipe (6) and the second heat preservation box (51), the third air inlet valve (551) is arranged on the third air inlet pipe (55), the third air outlet pipe (56) is arranged in communication between the air outlet main pipe (7) and the second heat preservation box (51), the third air outlet valve (561) is arranged on the third air outlet pipe (56), the fourth thermometer (54) is arranged on the second hot water supply tank (5), the bottom end of the second spiral groove (511) is in mutual communication with the third air inlet pipe (55), and the top end of the second spiral groove (511) is in mutual communication with the third air outlet pipe (56).

8. The system according to claim 1, wherein the system is characterized in that: The first mixing stirrer (47) is arranged in the first hot water supply tank (4), and the second mixing stirrer (57) is arranged in the second hot water supply tank (5).

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