Anaerobic tank heating device and landfill leachate treatment equipment

Abstract

The utility model discloses an anaerobic tank heating device and landfill leachate treatment equipment, and relates to the technical field of landfill leachate treatment. The first heat exchanger is arranged on a liquid inlet pipeline between a liquid outlet of the anaerobic tank and an inlet end of the anaerobic circulating pump, and a first steam port connected with steam supply equipment is formed in the first heat exchanger. According to the anaerobic tank heating device provided by the utility model, the first heat exchanger is arranged on the liquid inlet pipeline between the liquid outlet of the anaerobic tank and the inlet end of the anaerobic circulating pump, and low-pressure steam is provided for the first heat exchanger through the first steam port on the first heat exchanger, so that the heat exchange effect and the heat exchange continuity are ensured; and the heat exchange efficiency is improved, continuous and uniform heating of the anaerobic tank is realized, the fluctuation of the heat exchange temperature is reduced, and the working efficiency of the UASB of the anaerobic tank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of garbage leachate treatment, and more specifically to an anaerobic pool heating device and garbage leachate treatment equipment. Background Art

[0002] During the operation of anaerobic tank UASB (Upflow Anaerobic Sludge Blanket), due to weather, temperature, season and other reasons, the water temperature of the anaerobic tank is often not high, which leads to the inability of the anaerobic reaction of the leachate to fully proceed under suitable conditions, causing great trouble to the back-end biochemical equipment. In order to solve these problems, anaerobic tank heating technology has been proposed and promoted, which can bring more suitable operating conditions for the anaerobic reaction in the process of landfill leachate treatment.

[0003] In the prior art, a heat exchanger is usually installed on the liquid outlet pipe between the outlet end of the anaerobic circulation pump and the liquid inlet of the anaerobic tank. The heat exchanger body includes a liquid inlet end, a liquid outlet end and a steam port. The heating effect of the anaerobic tank is achieved by mixing low-pressure steam with the leachate flowing into the heat exchanger. However, the steam pressure and leachate pressure of this technical solution need to meet the set pressure conditions to achieve a continuous heating effect. However, when the anaerobic tank UASB is working, the fluctuation of the boiler load often causes the steam pressure to change and fail to meet the design pressure, making it impossible to achieve effective control of continuous and uniform heating, resulting in the inability to effectively meet the appropriate conditions that should be possessed by the anaerobic reaction, thereby making the working efficiency of the anaerobic tank UASB low.

[0004] Therefore, how to achieve continuous and uniform heating of the anaerobic tank has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of this, an object of the present invention is to provide an anaerobic tank heating device to achieve continuous and uniform heating of the anaerobic tank.

[0006] Another object of the utility model is to provide a garbage leachate treatment device having the above-mentioned anaerobic tank heating device.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An anaerobic tank heating device, comprising:

[0009] The first heat exchanger is used to be arranged on the liquid inlet pipeline between the liquid outlet of the anaerobic tank and the inlet end of the anaerobic circulation pump, and the first heat exchanger is provided with a first steam port for connecting to the steam supply equipment.

[0010] Optionally, in the above-mentioned anaerobic tank heating device, the steam supply equipment is connected to the first steam port of the first heat exchanger through a first steam pipeline, and a first check valve for preventing steam backflow is provided on the first steam pipeline.

[0011] Optionally, in the above-mentioned anaerobic tank heating device, the first heat exchanger includes a mixing tube, the mixing tube having a liquid inlet end and a liquid outlet end relatively arranged, the liquid inlet end of the mixing tube is connected to the liquid outlet of the anaerobic tank, the liquid outlet end of the mixing tube is connected to the inlet end of the anaerobic circulation pump, and the first steam port is located between the liquid inlet end and the liquid outlet end of the mixing tube.

[0012] Optionally, in the above-mentioned anaerobic tank heating device, both the first steam pipeline and the mixing pipe are made of metal pipes.

[0013] Optionally, in the above-mentioned anaerobic tank heating device, the liquid inlet pipe is a PE pipe, and the distance between the position of the first steam port and the liquid inlet end of the mixing tube is 1 / 4 of the length of the mixing tube.

[0014] Optionally, the above-mentioned anaerobic tank heating device also includes a second heat exchanger, which is used to be arranged on the liquid outlet pipe between the outlet end of the anaerobic circulation pump and the liquid inlet of the anaerobic tank, and the second heat exchanger is provided with a second steam port for connecting to the steam supply equipment.

[0015] Optionally, in the above anaerobic tank heating device, the steam supply device is connected to the second steam port of the second heat exchanger through a second steam pipeline, and a second check valve for preventing steam backflow is provided on the second steam pipeline.

[0016] Optionally, in the above-mentioned anaerobic tank heating device, the steam supply device is provided with a steam outlet, the steam outlet is connected to a steam main pipe, and the first steam pipeline and the second steam pipeline are respectively connected to the steam main pipe.

[0017] Optionally, in the above-mentioned anaerobic tank heating device, a high temperature resistant filter is provided at the position of the first steam port and the second steam port.

[0018] A garbage leachate treatment device comprises an anaerobic tank and an anaerobic tank heating device as described above for heating the anaerobic tank.

[0019] The anaerobic tank heating device provided by the utility model is provided with a first heat exchanger on the liquid inlet pipe between the liquid outlet of the anaerobic tank and the inlet end of the anaerobic circulation pump, and low-pressure steam is provided in the first heat exchanger through the first steam port on the first heat exchanger. When the anaerobic tank UASB is in operation, the leachate flows out from the liquid outlet of the anaerobic tank, and is accelerated by the action of the anaerobic circulation pump. After mixing with the steam for heat exchange at the first heat exchanger, the leachate circulates to the liquid inlet at the bottom of the anaerobic tank. Since the first heat exchanger is provided on the liquid inlet pipe between the liquid outlet of the anaerobic tank and the inlet end of the anaerobic circulation pump, at this time, it is only necessary to ensure that the steam pressure is slightly higher than the static pressure at the inlet end of the anaerobic circulation pump, and the heat exchange will continue, so that it is no longer limited to the traditional steam with a set pressure, and the heat exchange effect and continuity of the heat exchange are guaranteed, the heat exchange efficiency is improved, the continuous and uniform heating of the anaerobic tank is realized, the fluctuation of the heat exchange temperature is reduced, and the working efficiency of the anaerobic tank UASB is improved.

[0020] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown separately in the drawings can be combined with each other arbitrarily, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 A schematic structural diagram of an anaerobic tank heating device provided in an embodiment of the utility model.

[0023] Wherein, 100 is a first heat exchanger, 101 is a liquid inlet pipe, 102 is a first steam port, 103 is a first steam pipeline, 1031 is a first check valve, 104 is a mixing pipe, 1041 is a liquid inlet end, and 1042 is a liquid outlet end;

[0024] 200 is a second heat exchanger, 201 is a liquid outlet pipe, 202 is a second steam port, 203 is a second steam pipeline, and 2031 is a second check valve;

[0025] 300 is an anaerobic circulation pump, 301 is an inlet end, and 302 is an outlet end;

[0026] 400 is the steam main. DETAILED DESCRIPTION

[0027] The core of the utility model is to provide an anaerobic tank heating device to achieve continuous and uniform heating of the anaerobic tank.

[0028] Another core of the utility model is to provide a garbage leachate treatment device with the above-mentioned anaerobic tank heating device.

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] During the operation of anaerobic tank UASB (Upflow Anaerobic Sludge Blanket), due to weather, temperature, season and other reasons, the water temperature of the anaerobic tank is often low, which leads to the inability of the anaerobic reaction of the leachate to fully proceed under suitable conditions, causing great trouble to the back-end biochemical equipment. In order to solve these problems, anaerobic tank heating technology has been proposed and promoted, which can bring more suitable operating conditions for the anaerobic reaction in the process of landfill leachate treatment.

[0031] In the prior art, an anaerobic tank has a liquid inlet and a liquid outlet, and the liquid outlet is located above the liquid inlet. The liquid outlet of the anaerobic tank is connected to the inlet of the anaerobic circulation pump through an inlet pipe, and the outlet of the anaerobic circulation pump is connected to the liquid inlet of the anaerobic tank through an outlet pipe. In order to ensure that the water temperature of the anaerobic tank can meet the appropriate conditions for anaerobic reaction, a heat exchanger is usually installed on the outlet pipe between the outlet of the anaerobic circulation pump and the liquid inlet of the anaerobic tank. The heat exchanger body includes a liquid inlet, a liquid outlet and a steam port, and the heating effect of the anaerobic tank is achieved by mixing low-pressure steam with the leachate flowing into the heat exchanger.

[0032] However, the steam pressure and leachate pressure of this technical solution need to meet the set pressure conditions to achieve continuous heating effect. However, when the anaerobic tank UASB is working, the boiler load fluctuation often causes the steam pressure to change and cannot meet the rated design pressure, making it impossible to effectively control continuous and uniform heating, resulting in the inability to effectively meet the appropriate conditions that should be possessed by anaerobic reactions, resulting in low working efficiency of the anaerobic tank UASB.

[0033] For this reason, Figure 1As shown, the embodiment of the utility model discloses an anaerobic tank heating device, including a first heat exchanger 100. By arranging the first heat exchanger 100 on the liquid inlet pipe 101 between the liquid outlet of the anaerobic tank and the inlet end 301 of the anaerobic circulation pump 300, and providing low-pressure steam in the first heat exchanger 100 through the first steam port 102 on the first heat exchanger 100, the heat exchange effect and the continuity of heat exchange are guaranteed, the heat exchange efficiency is improved, the continuous and uniform heating of the anaerobic tank is realized, the fluctuation of the heat exchange temperature is reduced, and the working efficiency of the anaerobic tank UASB is improved.

[0034] The following will be combined Figure 1 The anaerobic tank heating device disclosed in the embodiment of the utility model is specifically explained and illustrated.

[0035] Among them, the first heat exchanger 100 is arranged on the liquid inlet pipe 101 between the liquid outlet of the anaerobic tank and the inlet end 301 of the anaerobic circulation pump 300, and the first heat exchanger 100 is provided with a first steam port 102 connected to the steam supply device, so that low-pressure steam is provided to the first heat exchanger 100 through the steam supply device, so that the low-pressure steam is mixed with the leachate flowing through the first heat exchanger 100 for heat exchange and then flows back to the anaerobic tank, so as to achieve the effect of heating the anaerobic tank. Specifically, when the anaerobic tank UASB is running, the leachate flows out from the liquid outlet of the anaerobic tank, is accelerated by the anaerobic circulation pump 300, and is mixed with the steam for heat exchange at the first heat exchanger 100, and then circulates to the liquid inlet at the bottom of the anaerobic tank. Since the first heat exchanger 100 is arranged on the liquid inlet pipe 101 between the liquid outlet of the anaerobic tank and the inlet end 301 of the anaerobic circulation pump 300, at this time, it is only necessary to ensure that the steam pressure is slightly higher than the static pressure of the inlet end 301 of the anaerobic circulation pump 300, and the heat exchange will continue, so that it is no longer limited to the traditional steam with a set pressure, and the heat exchange effect and continuity of the heat exchange are guaranteed, the heat exchange efficiency is improved, the continuous and uniform heating of the anaerobic tank is realized, the fluctuation of the heat exchange temperature is reduced, and the working efficiency of the anaerobic tank UASB is improved.

[0036] Furthermore, if Figure 1 As shown, the steam supply device is connected to the first steam port 102 of the first heat exchanger 100 through the first steam pipeline 103, and a first check valve 1031 is provided on the first steam pipeline 103 to prevent the steam from flowing back to the steam supply device and ensure the normal supply of steam. At the same time, a high temperature resistant filter is provided at the position of the first steam port 102 to ensure that the steam enters the first heat exchanger 100 evenly. Among them, the high temperature resistant filter of the first steam port 102 can be, but not limited to, a stainless steel filter, and can also be other metal filters, and the first check valve 1031 can be a lift check valve, a swing check valve or a butterfly check valve, which is not limited herein.

[0037] like Figure 1 As shown, in a specific embodiment, the first heat exchanger 100 includes a mixing tube 104, and the mixing tube 104 has two opposite ends. For ease of understanding, the two opposite ends of the mixing tube 104 are defined as a liquid inlet end 1041 and a liquid outlet end 1042. The liquid inlet end 1041 of the mixing tube 104 is connected to the liquid outlet of the anaerobic tank, the liquid outlet end 1042 of the mixing tube 104 is connected to the inlet end 301 of the anaerobic circulation pump 300, and the first steam port 102 is located between the liquid inlet end 1041 and the liquid outlet end 1042 of the mixing tube 104. In order to prevent steam under high temperature conditions from damaging the first heat exchanger 100 and the first steam pipeline 103, the first steam pipeline 103 and the mixing tube 104 are both made of metal pipes. In the present embodiment, the first steam pipeline 103 and the mixing tube 104 may be made of but not limited to stainless steel pipes, and the first heat exchanger 100 is made of a mixing tube 104 with a nominal diameter of 200 mm. At the same time, a high temperature resistant seal is provided at the connection position between the first steam pipeline 103 and the mixing tube 104, i.e., the first steam port 102, to ensure the sealing between the first steam pipeline 103 and the first heat exchanger 100 and prevent leakage of leachate. The high temperature resistant seal may be but not limited to a metal wound gasket, or a high temperature resistant sealing pad, etc., which is not limited in this article.

[0038] Furthermore, since the liquid inlet pipeline 101 adopts a PE tube (polyethylene tube), in order to prevent the steam at the first steam port 102 from damaging the liquid inlet pipeline 101, in this embodiment, the distance between the position of the first steam port 102 and the liquid inlet end 1041 of the mixing tube 104 is 1 / 4 of the length of the mixing tube 104, so as to reduce the influence of the steam discharged from the first steam port 102 on the liquid inlet pipeline 101, and at the same time, it can be ensured that the steam entering the first heat exchanger 100 is fully mixed with the leachate flowing through the first heat exchanger 100, so that the temperature rise of the leachate is more uniform, thereby effectively reducing the fluctuation of the heat exchange temperature. It should be noted that in the present application, the liquid inlet pipeline 101 can also be made of a metal tube to reduce the influence of the steam discharged from the first steam port 102 on the liquid inlet pipeline 101, but the corresponding cost will also increase.

[0039] Furthermore, if Figure 1As shown, the anaerobic tank heating device can also be provided with a second heat exchanger 200 on the basis of the first heat exchanger 100. The second heat exchanger 200 is provided on the liquid outlet pipe 201 between the outlet end 302 of the anaerobic circulation pump 300 and the liquid inlet of the anaerobic tank, and the second heat exchanger 200 is provided with a second steam port 202 connected to the steam supply device, so as to provide low-pressure steam to the second heat exchanger 200 through the steam supply device, so that the low-pressure steam is mixed with the leachate flowing through the second heat exchanger 200 for heat exchange and then flows back to the anaerobic tank, so as to improve the heating effect of the anaerobic tank. When the first heat exchanger 100 fails, the second heat exchanger 200 can be used as a backup heating device, so as to ensure the stability and reliability of the anaerobic tank heating device.

[0040] Furthermore, if Figure 1 As shown, the steam supply device is connected to the second steam port 202 of the second heat exchanger 200 through the second steam pipeline 203, and a second check valve 2031 is provided on the second steam pipeline 203 to prevent the steam from flowing back to the steam supply device and ensure the normal supply of steam. At the same time, a high temperature resistant filter is provided at the position of the second steam port 202 to ensure that the steam enters the second steam pipeline 203 evenly. Among them, the high temperature resistant filter of the second steam port 202 can be, but not limited to, a stainless steel filter, and can also be other metal filters, and the second check valve 2031 can be a lift check valve, a swing check valve or a butterfly check valve, which is not limited herein.

[0041] It should be noted that the specific structure of the second heat exchanger 200 is similar to that of the first heat exchanger 100, and will not be described in detail herein. Of course, the first heat exchanger 100 and the second heat exchanger 200 may also adopt other heat exchangers capable of achieving mixed heating of steam and water, and this is not limited herein.

[0042] Furthermore, in order to realize that the steam supply device is connected to the first heat exchanger 100 and the second heat exchanger 200 at the same time, the steam supply device is provided with a steam outlet, the steam outlet is connected to the steam main pipe 400, and the first steam pipeline 103 and the second steam pipeline 203 are respectively communicated with the steam main pipe 400. At the same time, control valves may be respectively provided on the first steam pipeline 103 and the second steam pipeline 203 to realize separate control of the first steam pipeline 103 and the second steam pipeline 203, so as to control and maintain the first heat exchanger 100 and the second heat exchanger 200.

[0043] The utility model embodiment also discloses a landfill leachate treatment device, including an anaerobic tank and a heating device for heating the anaerobic tank. The heating device is the anaerobic tank heating device disclosed in the above embodiment, and therefore has all the technical effects of the above anaerobic tank heating device, which will not be repeated herein.

[0044] The terms "first" and "second" in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anaerobic tank heating device, characterized in that: include: The first heat exchanger (100) is used to be arranged on the liquid inlet pipe (101) between the liquid outlet of the anaerobic tank and the inlet end (301) of the anaerobic circulation pump (300), and the first heat exchanger (100) is provided with a first steam port (102) for connecting to a steam supply device.

2. The anaerobic tank heating device according to claim 1, characterized in that: The steam supply device is connected to the first steam port (102) of the first heat exchanger (100) via a first steam pipeline (103), and a first check valve (1031) is provided on the first steam pipeline (103) for preventing steam backflow.

3. The anaerobic tank heating device according to claim 2, characterized in that: The first heat exchanger (100) comprises a mixing tube (104), wherein the mixing tube (104) has a liquid inlet end (1041) and a liquid outlet end (1042) arranged opposite to each other, the liquid inlet end (1041) of the mixing tube (104) is connected to the liquid outlet of the anaerobic tank, the liquid outlet end (1042) of the mixing tube (104) is connected to the inlet end (301) of the anaerobic circulation pump (300), and the first steam port (102) is located between the liquid inlet end (1041) and the liquid outlet end (1042) of the mixing tube (104).

4. The anaerobic tank heating device according to claim 3, characterized in that: The first steam pipeline (103) and the mixing pipe (104) are both made of metal pipes.

5. The anaerobic tank heating device according to claim 4, characterized in that: The liquid inlet pipe (101) is a PE pipe, and the distance between the position of the first steam port (102) and the liquid inlet end (1041) of the mixing tube (104) is 1 / 4 of the length of the mixing tube (104).

6. The anaerobic tank heating device according to claim 2, characterized in that: The invention also comprises a second heat exchanger (200), wherein the second heat exchanger (200) is arranged on a liquid outlet pipe (201) between an outlet end (302) of the anaerobic circulation pump (300) and a liquid inlet of the anaerobic tank, and the second heat exchanger (200) is provided with a second steam port (202) for connecting to the steam supply device.

7. The anaerobic tank heating device according to claim 6, characterized in that: The steam supply device is connected to the second steam port (202) of the second heat exchanger (200) via a second steam pipeline (203), and a second check valve (2031) is provided on the second steam pipeline (203) for preventing steam backflow.

8. The anaerobic tank heating device according to claim 7, characterized in that: The steam supply device is provided with a steam outlet, the steam outlet is connected to a steam main pipe (400), and the first steam pipeline (103) and the second steam pipeline (203) are respectively connected to the steam main pipe (400).

9. The anaerobic tank heating device according to claim 6, characterized in that: High temperature resistant filters are provided at the positions of the first steam port (102) and the second steam port (202).

10. A landfill leachate treatment device, characterized in that: The invention comprises an anaerobic tank and an anaerobic tank heating device as claimed in any one of claims 1 to 9 for heating the anaerobic tank.

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