Anaerobic heating system utilizing circulating water

Abstract

The utility model provides an anaerobic heating system utilizing circulating water, the anaerobic heating system comprises a collecting tank, an anaerobic reactor, a heat exchange assembly and a circulating water assembly, the collecting tank is used for introducing sewage, an inlet of the anaerobic reactor is communicated with a sewage outlet of the collecting tank, the heat exchange assembly comprises a first heat exchanger and a first detector, and the circulating water assembly comprises a second heat exchanger and a second detector. The cold side inlet and the cold side outlet of the first heat exchanger are communicated with the sewage outlet and the sewage inlet respectively, the hot side inlet of the first heat exchanger is provided with a heat exchange valve and connected with the first detector, the circulating water assembly comprises a cooling part and a circulating water heat exchanger, and the hot side inlet of the circulating water heat exchanger is connected with a steam exhaust outlet of the steam turbine. A cold side inlet of the circulating water heat exchanger is connected with a liquid outlet of the cooling piece, a cold side outlet of the circulating water heat exchanger is connected with a hot side inlet of the first heat exchanger, and a hot side outlet of the first heat exchanger is connected with a liquid inlet of the cooling piece. The anaerobic heating system utilizing the circulating water is good in sewage treatment effect and low in energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an anaerobic heating system utilizing circulating water. Background Art

[0002] At present, domestic waste incineration plants generally need to be equipped with leachate treatment systems, and anaerobic processes are mostly used in the leachate treatment process. In some domestic waste incineration plants that cooperate with food waste treatment projects, anaerobic treatment processes are also mostly used in the food waste treatment process. The temperature of the medium-temperature anaerobic reactor needs to be maintained at 30-35°C, and the temperature of the high-temperature anaerobic process reactor is 50-55°C. Therefore, it is usually necessary to heat the sewage in the anaerobic reactor to maintain a suitable temperature for anaerobic reaction.

[0003] In the related technology, anaerobic systems mostly use steam heating to reduce the amount of power generation. And the steam is mostly directly heated, that is, the steam is mixed with sewage, which not only increases the treatment load of sewage treatment, but also requires an increase in the amount of demineralized water preparation. In addition, the circulating water return water needs to be cooled by a mechanical ventilation cooling tower, and the heat in the return water is dissipated into the air. This process consumes a lot of electricity. Utility Model Content

[0004] The present utility model is based on the discovery and recognition of the following facts and problems by the utility model inventor:

[0005] The inventor of the utility model discovered that, in the related technology, the mixed treatment of steam and sewage can increase the temperature of the anaerobic reactor and promote the activity of anaerobic microorganisms. The increased activity of anaerobic microorganisms accelerates the metabolism of anaerobic microorganisms and produces biogas during the metabolism. The main component of biogas is methane, which is a clean energy source and can be used to prepare desalted water. Therefore, the anaerobic system in the related technology not only increases the treatment load of sewage treatment, but also requires the addition of supporting desalted water preparation equipment, resulting in increased system operating costs.

[0006] The utility model aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the embodiment of the utility model proposes an anaerobic heating system using circulating water, which can reduce the treatment load of sewage treatment, realize the waste heat utilization of steam turbine steam, and reduce the power consumption of cooling tower.

[0007] The anaerobic heating system using circulating water in the embodiment of the utility model comprises:

[0008] A collecting tank, wherein the collecting tank has a sewage inlet and a sewage outlet, and the sewage inlet is used to introduce sewage;

[0009] An anaerobic reactor, wherein the anaerobic reactor has an inlet and an outlet, wherein the inlet is connected to the sewage outlet;

[0010] A heat exchange component, the heat exchange component comprising a first heat exchanger and a first detector, the cold side inlet of the first heat exchanger is connected to the sewage outlet, the cold side outlet of the first heat exchanger is connected to the inlet, the first detector is connected to the first heat exchanger, a heat exchange valve is provided at the hot side inlet of the first heat exchanger, the first detector is electrically connected to the heat exchange valve to detect the temperature of the sewage entering the first heat exchanger and transmit the detected temperature information to the heat exchange valve, and the heat exchange valve can adjust the opening according to the temperature information;

[0011] A circulating water component, the circulating water component includes a cooling element and a circulating water heat exchanger, the cooling element has a liquid inlet and a liquid discharge port, the hot side inlet of the circulating water heat exchanger is connected to the exhaust outlet of the steam turbine, the cold side inlet of the circulating water heat exchanger is connected to the liquid discharge port, the cold side outlet of the circulating water heat exchanger is connected to the hot side inlet of the first heat exchanger so as to pass the circulating water after heat exchange in the circulating water heat exchanger into the first heat exchanger, and the hot side outlet of the first heat exchanger is connected to the liquid inlet.

[0012] The anaerobic heating system using circulating water in the embodiment of the utility model can use the circulating water in the circulating water heat exchanger to exchange heat with the steam discharged from the turbine, and the circulating water after heat exchange is used to heat the sewage in the first heat exchanger. At this time, the circulating water after heat exchange is passed into the cooling element, which can reduce the electric energy used by the cooling element to cool the circulating water, and at the same time avoid the heat loss of the turbine steam, thereby improving the energy utilization rate.

[0013] In some embodiments, there are two first detectors, one of which is disposed at the cold side inlet of the first heat exchanger, and the other of which is disposed at the cold side outlet of the first heat exchanger.

[0014] In some embodiments, the heat exchange assembly also includes a second heat exchanger and a second detector, the hot side inlet of the second heat exchanger is connected to the second steam extraction port of the incineration plant, the cold side inlet of the second heat exchanger is connected to the cold side outlet of the first heat exchanger, the cold side outlet of the second heat exchanger is connected to the inlet, the second detector is arranged on the pipeline between the cold side outlet of the second heat exchanger and the inlet, the hot side inlet of the second heat exchanger is provided with a regulating valve, the second detector is electrically connected to the regulating valve to detect the temperature of sewage entering the second heat exchanger, and the regulating valve can adjust the opening according to the sewage temperature.

[0015] In some embodiments, the second heat exchanger has a heat exchange cavity, and a hot side inlet, a cold side inlet, and a cold side outlet of the second heat exchanger are all in communication with the heat exchange cavity.

[0016] In some embodiments, the second heat exchanger has a cold side section and a hot side section, the cold side section is arranged adjacent to the hot side section, the cold side inlet and the cold side outlet of the second heat exchanger are both connected to the cold side section, and the hot side inlet of the second heat exchanger is connected to the hot side section.

[0017] In some embodiments, the hot side outlet of the circulating water heat exchanger is connected to the boiler inlet.

[0018] In some embodiments, the cold side outlet of the circulating water heat exchanger is connected to the liquid inlet through a pipeline, and a valve is provided on the pipeline between the cold side outlet of the circulating water heat exchanger and the liquid inlet.

[0019] In some embodiments, the anaerobic heating system using circulating water of the embodiment of the utility model further includes a stirring member, and the stirring member is installed at the bottom of the collection tank so as to stir the sewage in the collection tank.

[0020] In some embodiments, the anaerobic heating system using circulating water of the embodiment of the utility model also includes a monitoring device and a regulating pump, the monitoring device includes a first monitor, the first monitor is connected to the collection tank and is used to detect the liquid level information of the sewage in the collection tank, the regulating pump is installed on the pipeline between the sewage outlet and the cold side inlet of the first heat exchanger, the first monitor is electrically connected to the regulating pump so that the regulating pump can receive the liquid level information monitored by the first monitor, and adjust the outlet opening of the regulating pump according to the liquid level information.

[0021] In some embodiments, the monitoring device also includes a second monitor, which is connected to the collection tank to monitor the temperature information of the sewage in the collection tank. The second monitor is electrically connected to the heat exchange valve so that the heat exchange valve can receive the temperature information monitored by the second monitor and adjust the opening of the heat exchange valve according to the temperature information. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of an anaerobic heating system using circulating water according to an embodiment of the utility model.

[0023] Reference numerals:

[0024] 1. Collection tank, 11. Sewage inlet, 12. Sewage outlet,

[0025] 2. Anaerobic reactor, 21. inlet, 22. outlet,

[0026] 3. heat exchange component, 31. first heat exchanger, 32. first detector, 33. second heat exchanger, 34. second detector,

[0027] 4. Circulating water assembly, 41. Cooling element, 411. Liquid inlet, 412. Liquid outlet, 42. Circulating water heat exchanger, 43. Valve,

[0028] 5. Stirring parts,

[0029] 6. Monitoring device, 61. First monitoring device, 62. Adjusting pump, 63. Second monitoring device,

[0030] 7. Adjust the pump. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0032] like Figure 1 As shown, the anaerobic heating system using circulating water according to the embodiment of the utility model comprises: a collection tank 1 , an anaerobic reactor 2 , a heat exchange component 3 and a circulating water component 4 .

[0033] The collection tank 1 has a sewage inlet 11 and a sewage outlet 12, and the sewage inlet 11 is used to pass sewage. The anaerobic reactor 2 has an inlet 21 and an outlet 22, and the inlet 21 is connected to the sewage outlet 12. Specifically, as shown in the figure, sewage is passed into the collection tank 1 through the sewage inlet 11 for buffering, and the sewage outlet 12 of the collection tank 1 is connected to the inlet 21 of the anaerobic reactor 2, so that the sewage can enter the anaerobic reactor 2 from the collection tank 1 for the next step of treatment.

[0034] The heat exchange component 3 includes a first heat exchanger 31 and a first detector 32. The cold side inlet of the first heat exchanger 31 is connected to the sewage outlet 12, and the cold side outlet of the first heat exchanger 31 is connected to the inlet 21. The first detector 32 is connected to the first heat exchanger 31. The hot side inlet of the first heat exchanger 31 is provided with a heat exchange valve. The first detector 32 is electrically connected to the heat exchange valve to detect the temperature of the sewage entering the first heat exchanger 31 and transmit the detected temperature information to the heat exchange valve. The heat exchange valve can adjust the opening according to the temperature information.

[0035] The circulating water assembly 4 includes a cooling element 41 and a circulating water heat exchanger 42. The cooling element 41 has a liquid inlet 411 and a liquid discharge port 412. The hot side inlet of the circulating water heat exchanger 42 is connected to the exhaust outlet of the steam turbine, the cold side inlet of the circulating water heat exchanger 42 is connected to the liquid discharge port 412, and the cold side outlet of the circulating water heat exchanger 42 is connected to the hot side inlet of the first heat exchanger 31 so as to pass the circulating water after heat exchange in the circulating water heat exchanger 42 into the first heat exchanger 31. The hot side outlet of the first heat exchanger 31 is connected to the liquid inlet 411.

[0036] It can be understood that, as shown in the figure, the sewage outlet 12 can be connected to the cold side inlet of the first heat exchanger 31 through a pipeline, and the hot side inlet of the first heat exchanger 31 can be connected to the cold side outlet of the circulation and heat exchanger through a pipeline, so that the sewage discharged from the sewage outlet 12 is passed into the first heat exchanger 31 as a cold source, and the circulating water after heat exchange with steam in the circulating water heat exchanger 42 is passed into the first heat exchanger 31 as a heat source, so that after the sewage is heated by the circulating water after heat exchange in the first heat exchanger 31, the heated sewage is passed into the anaerobic reactor 2.

[0037] The cooling element 41 can be a cooling tower, and the cooling element 41 can use electric energy to drive the fan to cool the circulating water. The cooling water discharged from the drain port 412 of the cooling element 41 is passed into the circulating water heat exchanger 42, and can be cooled with the steam discharged from the exhaust port of the steam turbine. After the circulating water exchanges heat with the steam, it is passed into the first heat exchanger 31 as a heat source, and the sewage passed into the first heat exchanger 31 is heated (indirect heat exchange), which not only realizes the use of the heat of the circulating water heat exchanger 42 to heat the sewage, but also utilizes the waste heat of the exhaust of the steam turbine. In addition, it avoids the use of power plant steam to heat the sewage, reducing the use of steam.

[0038] During the heat exchange process between circulating water and steam, the circulating water absorbs the latent heat of steam and its temperature rises to 40-50°C. The circulating water return water needs to be cooled by the mechanical ventilation cooling tower in the factory before use, and this process consumes a lot of electricity. Therefore, after the circulating water exchanges heat with the sewage, its own temperature drops, and the circulating water after heat exchange is passed into the cooling element 41, which not only realizes the utilization of the heat energy of the circulating water, but also reduces the electricity consumed by the cooling element 41 during the cooling process.

[0039] Optionally, the hot side outlet of the circulating water heat exchanger 42 is connected to the boiler inlet 21. That is, the steam discharged from the exhaust outlet of the steam turbine is passed into the circulating water heat exchanger 42, and heat is exchanged with the circulating water in the circulating water heat exchanger 42, so that the steam is cooled and liquefied to form liquid, and this part of the liquid can be passed back into the boiler for use to avoid waste.

[0040] It should be noted that the first detector 32 may be a temperature sensor, and the first detector 32 and the heat exchange valve may be connected via a wired line or wirelessly, so that the first detector 32 and the heat exchange valve can transmit signals. The circulating water heat exchanger 42 may be a condenser, and a water pump is provided on the pipeline between the cold side inlet of the circulating water heat exchanger 42 and the drain port 412 of the cooling element 41, so as to extract the circulating water in the cooling element 41 and pass it into the circulating water heat exchanger 42.

[0041] That is to say, the first detector 32 can detect the sewage temperature and process the detected sewage temperature, that is, when the sewage temperature is lower than the preset temperature, a control instruction to increase the opening and closing degree can be issued to the heat exchange valve, so that the opening of the heat exchange valve is increased, thereby increasing the flow of circulating water entering the first heat exchanger 31, thereby improving the heat exchange efficiency between the circulating water and the sewage, and achieving the purpose of increasing the sewage temperature. Conversely, when it is detected that the sewage temperature is higher than the preset temperature, an instruction to reduce the opening and closing degree can be issued to the heat exchange valve to reduce the temperature of the sewage after heat exchange.

[0042] Preferably, there are two first detectors 32, one of which is arranged at the cold side inlet of the first heat exchanger 31, and the other of which is arranged at the cold side outlet of the first heat exchanger 31. That is to say, before the sewage discharged from the sewage outlet 12 enters the first heat exchanger 31, one of the first detectors 32 can be used to detect the temperature, and then when the sewage after heat exchange is discharged from the cold side outlet of the first heat exchanger 31, the other first detector 32 can be used to detect the temperature of the sewage after heat exchange, so that the temperature change of the sewage before and after heat exchange can be better detected, so that the opening and closing degree of the heat exchange valve can be more accurately controlled through the detection information, so as to ensure higher detection accuracy, and the heat exchange valve can be quickly controlled through the value changes of the two first detectors 32 in time to ensure the heat exchange effect of the first heat exchanger 31.

[0043] Therefore, the anaerobic heating system using circulating water in the embodiment of the utility model can use the circulating water in the circulating water heat exchanger 42 to exchange heat with the steam exhausted by the turbine, and the circulating water after heat exchange is used to heat the sewage in the first heat exchanger 31. At this time, the circulating water after heat exchange is passed into the cooling element 41, which can reduce the electric energy used by the cooling element 41 to cool the circulating water, and at the same time avoid the heat loss of the turbine steam, thereby improving the energy utilization rate.

[0044] In some embodiments, the heat exchange component 3 also includes a second heat exchanger 33 and a second detector 34. The hot side inlet of the second heat exchanger 33 is connected to the second steam extraction port of the incineration plant, the cold side inlet of the second heat exchanger 33 is connected to the cold side outlet of the first heat exchanger 31, and the cold side outlet of the second heat exchanger 33 is connected to the inlet 21. The second detector 34 is arranged on the pipeline between the cold side outlet of the second heat exchanger 33 and the inlet 21. The hot side inlet of the second heat exchanger 33 is provided with a regulating valve. The second detector 34 is electrically connected to the regulating valve to detect the temperature of the sewage entering the second heat exchanger 33, and the regulating valve can adjust the opening according to the sewage temperature.

[0045] Specifically, Figure 1As shown, the cold side outlet of the first heat exchanger 31 is connected to the cold side inlet of the second heat exchanger 33 through a pipeline, and the cold side outlet of the second heat exchanger 33 is connected to the inlet 21 of the anaerobic reactor 2 through a pipeline, so that the sewage after heat exchange in the first heat exchanger 31 passes through the second heat exchanger 33 for heat exchange and then enters the anaerobic reactor 2.

[0046] It is understandable that the second detector 34 may be a temperature sensor, which can detect the temperature of sewage discharged after heat exchange in the second heat exchanger 33 and determine whether the opening of the regulating valve needs to be changed based on the detected temperature.

[0047] It should be noted that the treatment temperatures of the medium-temperature anaerobic treatment process and the high-temperature anaerobic treatment process in the anaerobic treatment process are 30-35°C and 50-55°C, respectively. The heat exchange temperature of circulating water and steam is generally 40-50°C. If the anaerobic reactor 2 needs to perform a medium-temperature anaerobic treatment process, the temperature standard can be reached by using the first heat exchanger 31 for heat exchange. At this time, the regulating valve is closed, that is, the sewage in the second heat exchanger 33 does not undergo heat exchange. On the contrary, if the anaerobic reactor 2 needs to perform a high-temperature anaerobic treatment process, and the temperature of the sewage after heat exchange in the first heat exchanger 31 does not meet the standard, the regulating valve can be opened so that the sewage undergoes a second heat exchange in the second heat exchanger 33 so that the sewage temperature reaches the temperature required for the high-temperature anaerobic treatment process.

[0048] Optionally, the second heat exchanger 33 has a heat exchange cavity, and the hot side inlet, cold side inlet and cold side outlet of the second heat exchanger 33 are all connected to the heat exchange cavity. In other words, the sewage and the steam discharged from the second steam extraction port of the incineration plant are directly heat exchanged in the second heat exchanger 33, so that the heating effect is better.

[0049] Optionally, the second heat exchanger 33 has a cold side section and a hot side section, the cold side section is arranged adjacent to the hot side section, the cold side inlet and the cold side outlet of the second heat exchanger 33 are both connected to the cold side section, and the hot side inlet of the second heat exchanger 33 is connected to the hot side section. In other words, the sewage and the steam discharged from the second steam extraction port of the incineration plant are indirectly heat exchanged in the second heat exchanger 33 to avoid direct mixing of the sewage and the steam, thereby reducing the processing load of subsequent sewage treatment.

[0050] In some embodiments, the cold side outlet of the circulating water heat exchanger 42 is connected to the liquid inlet 411 through a pipeline, and a valve 43 is provided on the pipeline between the cold side outlet of the circulating water heat exchanger 42 and the liquid inlet 411 .

[0051] Specifically, Figure 1 As shown, the cold side outlet of the circulating water heat exchanger 42 is connected to two branches, one branch is connected to the hot side inlet of the first heat exchanger 31 , and the other branch is connected to the liquid inlet 411 of the cooling element 41 .

[0052] That is to say, the circulating water discharged from the cold side outlet of the circulating water heat exchanger 42 can be discharged according to the demand of the first heat exchanger 31, that is, when the first heat exchanger 31 requires more heat source, the valve 43 on the pipeline between the cold side outlet of the circulating water heat exchanger 42 and the liquid inlet 411 can be closed to allow the circulating water to pass into the first heat exchanger 31 after heat exchange with steam. Conversely, if the heat source demand of the first heat exchanger 31 decreases, the valve 43 can be opened so that the excess circulating water in the circulating water heat exchanger 42 can be directly passed into the cooling element 41.

[0053] In some embodiments, the anaerobic heating system using circulating water in the embodiment of the utility model further includes a stirring member 5, which is installed at the bottom of the collection tank 1 to stir the sewage in the collection tank 1. It is understandable that the stirring member 5 can be a paddle stirrer, so that when the stirring member 5 is started, the high-speed rotation of the slurry can generate a vortex, thereby ensuring that the sewage is uniform in quality and quantity in the collection tank 1, providing conditions for sufficient anaerobic reaction in the subsequent process.

[0054] In some embodiments, the anaerobic heating system using circulating water of the embodiment of the present invention also includes a monitoring device 6 and a regulating pump 7. The monitoring device 6 includes a first monitor 61. The first monitor 61 is connected to the collection tank and is used to detect the liquid level information of the sewage in the collection tank. The regulating pump 7 is installed on the pipeline between the sewage outlet and the cold side inlet of the first heat exchanger. The first monitor 61 is electrically connected to the regulating pump 7 so that the regulating pump 7 can receive the liquid level information monitored by the first monitor 61 and adjust the outlet opening of the regulating pump 7 according to the liquid level information.

[0055] It is understandable that if Figure 1 As shown, the first monitor 61 is installed on the side wall of the collection tank so as to monitor the liquid level of the sewage in the collection tank in real time. The first monitor 61 can be a liquid level sensor. The first monitor 61 and the regulating pump 7 can be connected by wire or wirelessly, so that the first monitor 61 can transmit the monitored sewage liquid level information to the regulating pump 7, so that the regulating pump 7 can adjust the outlet opening according to the liquid height information to ensure the stability of the subsequent sewage heat exchange process.

[0056] In some embodiments, the monitoring element 6 further includes a second monitor 62, which is connected to the collection tank to monitor the temperature information of the sewage in the collection tank. The second monitor 62 is electrically connected to the heat exchange valve so that the heat exchange valve can receive the temperature information monitored by the second monitor 62 and adjust the opening of the heat exchange valve according to the temperature information. It can be understood that if Figure 1As shown, the second monitor 62 is installed on the side wall of the collection tank so as to monitor the temperature of the sewage in the collection tank in real time. The second monitor 62 may be a temperature sensor. The second monitor 62 and the heat exchange valve may be connected by wire or wirelessly, so that the second monitor 62 can transmit the monitored temperature information of the sewage to the heat exchange valve, so that the heat exchange valve can adjust the opening according to the temperature information, thereby ensuring the heat exchange effect between the circulating water and the sewage in the first heat exchanger.

[0057] That is to say, the anaerobic heating system using circulating water in the embodiment of the present invention can use the first monitor 61 and the second monitor 62 to monitor the sewage level and temperature in the collection tank in real time, and control the outlet opening of the regulating pump 7 and the opening of the heat exchange valve according to the monitored information, so that the flow rate of sewage and the circulating water flow rate in the first heat exchanger maintain a certain ratio. While ensuring the heat exchange effect, the sewage volume and circulating water volume can be monitored in real time during the operation of the entire system, thereby improving the stability of the system operation.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0063] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An anaerobic heating system using circulating water, characterized in that: include: A collecting tank, wherein the collecting tank has a sewage inlet and a sewage outlet, and the sewage inlet is used to introduce sewage; An anaerobic reactor, wherein the anaerobic reactor has an inlet and an outlet, wherein the inlet is connected to the sewage outlet; A heat exchange component, the heat exchange component comprising a first heat exchanger and a first detector, the cold side inlet of the first heat exchanger is connected to the sewage outlet, the cold side outlet of the first heat exchanger is connected to the inlet, the first detector is connected to the first heat exchanger, a heat exchange valve is provided at the hot side inlet of the first heat exchanger, the first detector is electrically connected to the heat exchange valve to detect the temperature of the sewage entering the first heat exchanger and transmit the detected temperature information to the heat exchange valve, and the heat exchange valve can adjust the opening according to the temperature information; A circulating water component, the circulating water component includes a cooling element and a circulating water heat exchanger, the cooling element has a liquid inlet and a liquid discharge port, the hot side inlet of the circulating water heat exchanger is connected to the exhaust outlet of the steam turbine, the cold side inlet of the circulating water heat exchanger is connected to the liquid discharge port, the cold side outlet of the circulating water heat exchanger is connected to the hot side inlet of the first heat exchanger so as to pass the circulating water after heat exchange in the circulating water heat exchanger into the first heat exchanger, and the hot side outlet of the first heat exchanger is connected to the liquid inlet.

2. The anaerobic heating system using circulating water according to claim 1, characterized in that: There are two first detectors, one of which is disposed at the cold side inlet of the first heat exchanger, and the other of which is disposed at the cold side outlet of the first heat exchanger.

3. The anaerobic heating system using circulating water according to claim 2, characterized in that: The heat exchange assembly also includes a second heat exchanger and a second detector. The hot side inlet of the second heat exchanger is connected to the second steam extraction port of the incineration plant, the cold side inlet of the second heat exchanger is connected to the cold side outlet of the first heat exchanger, and the cold side outlet of the second heat exchanger is connected to the inlet. The second detector is arranged on the pipeline between the cold side outlet and the inlet of the second heat exchanger. The hot side inlet of the second heat exchanger is provided with a regulating valve. The second detector is electrically connected to the regulating valve to detect the temperature of sewage entering the second heat exchanger, and the regulating valve can adjust the opening according to the sewage temperature.

4. The anaerobic heating system using circulating water according to claim 3, characterized in that: The second heat exchanger has a heat exchange cavity, and a hot side inlet, a cold side inlet and a cold side outlet of the second heat exchanger are all in communication with the heat exchange cavity.

5. The anaerobic heating system using circulating water according to claim 3, characterized in that: The second heat exchanger has a cold side section and a hot side section, the cold side section is arranged adjacent to the hot side section, the cold side inlet and the cold side outlet of the second heat exchanger are both connected to the cold side section, and the hot side inlet of the second heat exchanger is connected to the hot side section.

6. The anaerobic heating system using circulating water according to claim 4 or 5, characterized in that: The hot side outlet of the circulating water heat exchanger is connected to the boiler inlet.

7. The anaerobic heating system using circulating water according to claim 6, characterized in that: The cold side outlet of the circulating water heat exchanger is connected to the liquid inlet through a pipeline, and a valve is provided on the pipeline between the cold side outlet of the circulating water heat exchanger and the liquid inlet.

8. The anaerobic heating system using circulating water according to claim 7, characterized in that: It also includes a stirring member, which is installed at the bottom of the collection tank to stir the sewage in the collection tank.

9. The anaerobic heating system using circulating water according to claim 8, characterized in that: It also includes a monitoring component and a regulating pump. The monitoring component includes a first monitor, which is connected to the collection tank and used to detect the liquid level information of the sewage in the collection tank. The regulating pump is installed on the pipeline between the sewage outlet and the cold side inlet of the first heat exchanger. The first monitor is electrically connected to the regulating pump so that the regulating pump can receive the liquid level information monitored by the first monitor and adjust the outlet opening of the regulating pump according to the liquid level information.

10. The anaerobic heating system using circulating water according to claim 9, characterized in that: The monitoring device also includes a second monitor, which is connected to the collection tank to monitor the temperature information of the sewage in the collection tank. The second monitor is electrically connected to the heat exchange valve so that the heat exchange valve can receive the temperature information monitored by the second monitor and adjust the opening of the heat exchange valve according to the temperature information.

Images