Anaerobic tank reaction system

Abstract

The present invention relates to an anaerobic tank reaction system, which comprises an anaerobic tank, a water collecting device, a mud discharge device, a circulation device and a control device, wherein the water collecting device is arranged in the anaerobic tank, the mud discharge device comprises a mud collector, a mud discharge pipeline and a sludge pool, the mud collector is arranged in the anaerobic tank, the first end of the mud discharge pipeline is connected to the bottom of the anaerobic tank, the second end of the mud discharge pipeline is connected to the sludge pool, the circulation device comprises a first pipe, a second pipe, a third pipe and a circulation pump, the first end of the first pipe is connected to the water collecting device and the wastewater source, the second end of the first pipe is connected to the inlet of the circulation pump, the first end of the second pipe is connected to the outlet of the circulation pump, the second end of the second pipe is connected to the anaerobic tank, the first end of the third pipe is connected to the outlet of the circulation pump, the second end of the third pipe is connected to the mud discharge pipeline, and the control device is used to control the conduction and disconnection of the pipeline. The anaerobic tank reaction system of the present invention has good mud discharge effect, flexible operation mode and high system stability.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to an anaerobic tank reaction system. Background Art

[0002] The anaerobic tank is a highly efficient multi-stage internal circulation anaerobic reaction tank. The anaerobic tank is suitable for the treatment of high-concentration organic wastewater, such as corn starch wastewater, citric acid wastewater, beer wastewater, leachate and other wastewater.

[0003] The sludge concentration inside the anaerobic tank is relatively high, and sludge is easily deposited in the sludge hopper at the bottom. Since the calcium and magnesium ion content in the leachate inlet water is high and the sludge pump is not running continuously, the corresponding pipelines are easily blocked by scaling. The pipeline system of the blocked anaerobic tank cannot discharge sludge, and the tank needs to be opened for maintenance, which affects production, and the stability during use is poor, resulting in high operating costs. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides an anaerobic tank reaction system with better sludge discharge effect, flexible operation mode and higher system stability.

[0006] The anaerobic tank reaction system of the embodiment of the present invention comprises: an anaerobic tank; a water collecting device, wherein the water collecting device is arranged in the anaerobic tank; a sludge discharge device, wherein the sludge discharge device comprises a sludge collector, a sludge discharge pipeline and a sludge pool, wherein the sludge collector is arranged in the anaerobic tank and is located at the bottom of the anaerobic tank, wherein the first end of the sludge discharge pipeline is communicated with the bottom of the anaerobic tank, and the second end of the sludge discharge pipeline is communicated with the sludge pool; a circulation device, wherein the circulation device comprises a first pipe, a second pipe, a third pipe and a circulation pump, wherein the first end of the first pipe is communicated with at least one of the water collecting device and a wastewater source, the second end of the first pipe is communicated with the inlet of the circulation pump, the first end of the second pipe is communicated with the outlet of the circulation pump, the second end of the second pipe is communicated with the anaerobic tank, the first end of the third pipe is communicated with the outlet of the circulation pump, and the second end of the third pipe is communicated with the sludge discharge pipeline; and a control device, wherein the control device is used to control the conduction and disconnection of the sludge discharge pipeline, the first pipe, the second pipe and the third pipe.

[0007] According to the anaerobic tank reaction system of the embodiment of the present invention, when the anaerobic tank reaction system is operating normally, the circulation pump is started, and the control device controls the first pipe and the second pipe to be connected, so that the water collected in the water collection device and / or the wastewater in the wastewater source can enter the circulation pump, and the circulation pump transports the water to the anaerobic tank through the third pipe for biochemical reaction in the anaerobic tank. On the other hand, the sludge in the sludge collector can be transported to the sludge pool through the sludge discharge pipeline, so that the sludge concentration in the anaerobic tank can be maintained stable.

[0008] When the mud discharge pipeline in the anaerobic tank is blocked or mud discharge is blocked, the first pipe and the third pipe can be controlled by the control device to be connected, so that the water collected in the water collection device and / or the wastewater in the wastewater source can be passed into the bottom of the anaerobic tank through the mud discharge pipeline, thereby backwashing the mud discharge pipeline and the bottom of the anaerobic tank to avoid the problem of opening the cover of the anaerobic tank for maintenance, making the mud discharge of the anaerobic tank reaction system smoother, and the circulating water in the anaerobic tank reaction system can be fully utilized. Therefore, the anaerobic tank reaction system of the embodiment of the present invention has the advantages of better mud discharge effect, flexible operation mode, and higher system stability.

[0009] In some embodiments, the sludge discharge device also includes a sludge discharge pump, and the sludge discharge pipeline includes a fourth pipe and a fifth pipe, the first end of the fourth pipe is connected to the bottom of the anaerobic tank, the second end of the fourth pipe is connected to the inlet of the sludge discharge pump, the first end of the fifth pipe is connected to the outlet of the sludge discharge pump, the second end of the fifth pipe is connected to the sludge tank, and the second end of the third pipe is connected to the fourth pipe.

[0010] In some embodiments, the circulation device also includes a sixth pipe and a seventh pipe, the first end of the sixth pipe is connected to the first pipe, the second end of the sixth pipe is connected to the fourth pipe, the first end of the seventh pipe is connected to the outlet of the mud pump, and the second end of the seventh pipe is connected to the fifth pipe, and the control device is used to control the conduction and disconnection of the sixth pipe and the seventh pipe.

[0011] In some embodiments, the mud discharge pipeline also includes an eighth pipe, a first end of the eighth pipe is connected to the fourth pipe, a second end of the eighth pipe is connected to the fifth pipe, and the control device is used to control the conduction and disconnection of the eighth pipe.

[0012] In some embodiments, the mud discharge device also includes a mud discharge bucket, which is arranged at the bottom of the anaerobic tank, and the mud collector is located above the mud discharge bucket. The second end of the fourth tube has a first branch, a second branch, and a third branch. The first branch extends into the mud discharge bucket, the second branch extends between the bottom wall of the mud discharge bucket and the bottom wall of the anaerobic tank, and the third branch is connected to the mud collector.

[0013] In some embodiments, there are at least two third branches, which are arranged at intervals along the vertical direction of the anaerobic tank.

[0014] In some embodiments, the anaerobic tank reaction system also includes a steam heating device, which includes a steam mixer and a steam pipeline. The first end of the steam mixer is connected to the second end of the first tube, the second end of the steam mixer is connected to the inlet of the circulation pump, the third end of the steam mixer is connected to the first end of the steam pipeline, the second end of the steam pipeline is used to connect to a steam source, and the control device is used to control the conduction and disconnection of the steam pipeline.

[0015] In some embodiments, the control device includes a check valve, an electric valve and a pressure transmitter. The check valve, the electric valve and the pressure transmitter are all arranged in the steam pipeline. The check valve is used to allow the steam in the steam pipeline to move only in the direction of the steam mixer. The pressure transmitter is used to detect the pressure in the steam pipeline. When the pressure in the steam pipeline exceeds or is lower than a set value, the electric valve is closed to disconnect the steam pipeline.

[0016] In some embodiments, the anaerobic jar reaction system further includes a first three-phase separator and a second three-phase separator, the first three-phase separator and the second three-phase separator are arranged in the anaerobic tube along the up and down directions, and the water collection device is disposed between the first three-phase separator and the second three-phase separator.

[0017] In some embodiments, the anaerobic tank reaction system also includes a gas-liquid separation device, which includes a gas-liquid separation tank, a water seal tank, a riser and an outlet pipe, the first end of the riser is in contact with the first three-phase separator and / or the second three-phase separator, the second end of the riser is connected to the gas-liquid separation tank, and the gas-liquid separation tank is connected to the outlet pipe through the water seal tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of an anaerobic tank reaction system according to an embodiment of the present invention.

[0019] Reference numerals:

[0020] 1. Anaerobic tank; 11. Water outlet;

[0021] 2. Water collection device;

[0022] 3. Mud discharge device; 31. Mud collector; 32. Mud discharge pipeline; 321. Fourth pipe; 3211. First branch; 3212. Second branch; 3213. Third branch; 322. Fifth pipe; 3221. Second flow meter; 323. Eighth pipe; 33. Sludge pool; 34. Mud discharge pump; 341. Sixth valve; 342. Seventh valve; 35. Mud discharge bucket;

[0023] 41. first pipe; 42. second pipe; 421. first flow meter; 43. third pipe; 44. circulation pump; 45. sixth pipe; 46. seventh pipe;

[0024] 51. Check valve; 52. Electric valve; 53. Pressure transmitter; 54. First valve; 55. Second valve; 56. Third valve; 57. Fourth valve; 58. Fifth valve;

[0025] 6. Steam heating device; 61. Steam mixer; 62. Steam pipeline;

[0026] 71. A first three-phase separator; 72. A second three-phase separator;

[0027] 8. Gas-liquid separation device; 81. Gas-liquid separation tank; 82. Water seal tank; 83. Lifting pipe;

[0028] 91. Wastewater source; 92. Steam source; 93. Anaerobic effluent collection tank; 93. Biogas tank. DETAILED DESCRIPTION

[0029] 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 should not be understood as limiting the present invention.

[0030] The anaerobic jar reaction system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0031] like Figure 1 As shown, the anaerobic tank reaction system according to the embodiment of the present invention includes: an anaerobic tank 1, a water collecting device 2, a mud discharge device 3, a circulation device and a control device.

[0032] The water collecting device 2 is arranged in the anaerobic tank 1, and the mud discharge device 3 includes a mud collector 31, a mud discharge pipeline 32 and a sludge pool 33. The mud collector 31 is arranged in the anaerobic tank 1 and is located at the bottom of the anaerobic tank 1. The first end of the mud discharge pipeline 32 is connected to the bottom of the anaerobic tank 1, and the second end of the mud discharge pipeline 32 is connected to the sludge pool 33. The circulation device includes a first pipe 41, a second pipe 42, a third pipe 43 and a circulation pump 44. The first end of the first pipe 41 is connected to the water collecting device 2 and at least one of the wastewater source 91, the second end of the first pipe 41 is connected to the inlet of the circulation pump 44, the first end of the second pipe 42 is connected to the outlet of the circulation pump 44, the second end of the second pipe 42 is connected to the anaerobic tank 1, the first end of the third pipe 43 is connected to the outlet of the circulation pump 44, and the second end of the third pipe 43 is connected to the mud discharge pipeline 32. The control device is used to control the conduction and disconnection of the mud discharge pipeline 32, the first pipe 41, the second pipe 42 and the third pipe 43.

[0033] According to the anaerobic tank reaction system of the embodiment of the present invention, when the anaerobic tank reaction system is operating normally, the circulation pump 44 is started, and the control device controls the first pipe 41 and the second pipe 42 to be connected, so that the water collected in the water collection device 2 and / or the wastewater in the wastewater source 91 can enter the circulation pump 44, and the circulation pump 44 transports the water to the anaerobic tank 1 through the third pipe 43 for biochemical reaction in the anaerobic tank 1. On the other hand, the sludge in the sludge collector 31 can be transported to the sludge pool 33 through the sludge discharge pipeline 32, so that the sludge concentration in the anaerobic tank 1 can be maintained stable.

[0034] When the mud discharge pipeline 32 in the anaerobic tank 1 is blocked or mud discharge is blocked, the first pipe 41 and the third pipe 43 can be controlled by the control device to be connected, so that the water collected in the water collection device 2 and / or the wastewater in the wastewater source 91 can be passed into the bottom of the anaerobic tank 1 through the mud discharge pipeline 32, thereby backwashing the mud discharge pipeline 32 and the bottom of the anaerobic tank 1 to avoid the problem of opening the cover of the anaerobic tank 1 for maintenance, making the mud discharge of the anaerobic tank reaction system smoother, and the circulating water in the anaerobic tank reaction system can be fully utilized. Therefore, the anaerobic tank reaction system of the embodiment of the present invention has the advantages of better mud discharge effect, flexible operation mode, and higher system stability.

[0035] For example, the control device includes a first valve 54 and a second valve 55. The first valve 54 is provided on the first tube 41 and is used to control the on-off of the first tube 41. The second valve 55 is provided on the third tube 43 and is used to control the on-off of the third tube 43.

[0036] Specifically, Figure 1As shown, the mud discharge device 3 also includes a mud discharge pump 34, and the mud discharge pipeline 32 includes a fourth pipe 321 and a fifth pipe 322. The first end of the fourth pipe 321 is connected to the bottom of the anaerobic tank 1, the second end of the fourth pipe 321 is connected to the inlet of the mud discharge pump 34, the first end of the fifth pipe 322 is connected to the outlet of the mud discharge pump 34, and the second end of the fifth pipe 322 is connected to the sludge pool 33. When the mud discharge device 3 is working, the mud discharge pump 34 is started to allow the sludge in the anaerobic tank 1 to enter the mud discharge pump 34 through the fourth pipe 321, and then be transported to the sludge pool 33 by the mud discharge pump 34 through the fifth pipe 322. The anaerobic tank reaction system of the embodiment of the present invention can improve the efficiency of mud discharge of the anaerobic tank 1 and reduce the problem of blockage of the mud discharge pipeline 32 by setting the mud discharge pump 34.

[0037] Furthermore, if Figure 1 As shown, the second end of the third pipe 43 is connected to the fourth pipe 321. When the mud discharge pipeline 32 in the anaerobic tank 1 is blocked or mud discharge is blocked, the first pipe 41 and the third pipe 43 can be controlled by the control device to be connected, so that the water collected in the water collection device 2 and / or the wastewater in the wastewater source 91 enter the bottom of the anaerobic tank 1 through the third pipe 43 and the fourth pipe 321, thereby backwashing the fourth pipe 321 and the bottom of the anaerobic tank 1 to dredge the mud discharge device 3.

[0038] In some embodiments, Figure 1 As shown, the circulation device also includes a sixth tube 45 and a seventh tube 46. The first end of the sixth tube 45 is connected to the first tube 41, the second end of the sixth tube 45 is connected to the fourth tube 321, the first end of the seventh tube 46 is connected to the outlet of the mud pump 34, and the second end of the seventh tube 46 is connected to the fifth tube 322. The control device is used to control the conduction and disconnection of the sixth tube 45 and the seventh tube 46.

[0039] It is understandable that the sixth pipe 45 and the seventh pipe 46 can be connected and disconnected respectively, wherein the sixth pipe 45 can use the circulating pump 44 to flush the mud discharge pipeline. The seventh pipe 46 can use the circulating pump 44 to discharge mud. When the mud discharge pump 34 is damaged or repaired, the seventh pipe 46 can be connected separately to discharge mud from the anaerobic tank reaction system. It is understandable that the mud discharge process of the anaerobic tank reaction system is intermittent mud discharge and does not need to be continuously opened. Therefore, the connection and disconnection of the sixth pipe 45 and the seventh pipe 46 can be independently controlled by the control device.

[0040] When the sludge discharge in the anaerobic tank 1 is blocked, the control device can be used to control the first tube 41 to be disconnected, the sixth tube 45 and the seventh tube 46 to be connected, and the circulation pump 44 can extract the mixed liquid in the bottom of the anaerobic tank 1 through the sixth tube 45 and the fourth tube 321, and discharge it into the sludge pool 33 through the seventh tube 46 and the fifth tube 322, so that the anaerobic tank 1 can perform low liquid level circulation, slow down the accumulation of sludge at the bottom, and make the sludge discharge in the anaerobic tank 1 smoother.

[0041] For example, Figure 1 As shown, the control device includes a third valve 56 and a fourth valve 57. The third valve 56 is provided on the sixth pipe 45, and the fourth valve 57 is provided on the seventh pipe 46. The third valve 56 is used to control the opening and closing of the sixth pipe 45, and the fourth valve 57 is used to control the opening and closing of the seventh pipe 46.

[0042] Alternatively, if Figure 1 As shown, the sludge discharge pipeline 32 also includes an eighth pipe 323, a first end of the eighth pipe 323 is connected to the fourth pipe 321, and a second end of the eighth pipe 323 is connected to the fifth pipe 322, and the control device is used to control the conduction and disconnection of the eighth pipe 323. For example, the control device includes a fifth valve 58, and the fifth valve 58 is arranged on the eighth pipe 323, and the fifth valve 58 is arranged on the eighth pipe 323. The fifth valve 58 is used to control the on-off of the eighth pipe 323, and the fifth valve 58 is used to control the on-off of the eighth pipe 323. During the operation of the anaerobic tank 1, if the liquid level of the sludge tank 33 is lower than the liquid level of the anaerobic tank 1 or the sludge discharge pump 34 needs to be repaired, the sludge discharge pump 34 can be turned off and the eighth pipe 323 can be turned on, so as to use the liquid level difference between the anaerobic tank 1 and the sludge tank 33 for gravity sludge discharge.

[0043] Specifically, Figure 1 As shown, a sixth valve 341 is provided at the inlet of the mud pump 34, and a seventh valve 342 is provided at the outlet of the mud pump 34. The sixth valve 341 is used to control the on-off of the inlet of the mud pump 34, and the seventh valve 342 is used to control the on-off of the outlet of the mud pump 34.

[0044] In some embodiments, Figure 1 As shown, the mud discharge device 3 further includes a mud discharge bucket 35, which is arranged at the bottom of the anaerobic tank 1, and the mud collector 31 is located above the mud discharge bucket 35. The second end of the fourth pipe 321 has a first branch 3211, a second branch 3212, and a third branch 3213. The first branch 3211 extends into the mud discharge bucket 35, the second branch 3212 extends between the bottom wall of the mud discharge bucket 35 and the bottom wall of the anaerobic tank 1, and the third branch 3213 is connected to the mud collector 31. For example, there are at least two third branches 3213 and they are arranged at intervals along the up and down direction of the anaerobic tank 1.

[0045] Specifically, Figure 1As shown, there are four flange interfaces between the fourth pipe 321 and the anaerobic tank 1. Stop valves are provided at the positions of the four flange interfaces to control the on and off of the four flange interfaces respectively. Two of the flange interfaces are connected to the sludge collector 31 at the bottom of the anaerobic tank 1. One flange interface is located at the lower part of the sludge hopper in the anaerobic tank 1. A sludge discharge pipe connected to a flange interface extends into the bottom of the sludge hopper in the anaerobic tank 1 and is not connected to the sludge collector 31. The branches connected by the four flange interfaces merge into a mother pipe and are connected to the inlet of the sludge pump 34. It can be understood that the anaerobic reaction system of the embodiment of the present invention is connected to the bottom of the anaerobic tank 1 and the sludge collector 31 by setting a plurality of branches, so that one or more of the branches can be used as a backup sludge discharge port, thereby improving the stability of the operation of the anaerobic reaction system.

[0046] In some embodiments, Figure 1 As shown, the anaerobic tank reaction system also includes a steam heating device 6, which includes a steam mixer 61 and a steam pipeline 62. The first end of the steam mixer 61 is connected to the second end of the first tube 41, the second end of the steam mixer 61 is connected to the inlet of the circulation pump 44, the third end of the steam mixer 61 is connected to the first end of the steam pipeline 62, and the second end of the steam pipeline 62 is used to communicate with the steam source 92. The control device is used to control the conduction and disconnection of the steam pipeline 62. When the temperature in the anaerobic tank 1 does not meet the process requirements, steam is introduced into the steam mixer 61 to heat the inlet water and the mixed liquid in the anaerobic tank 1, and the water outlet is returned to the anaerobic tank 1 through the circulation pump 44, thereby improving the efficiency of microbial reproduction in the anaerobic tank 1, and the use effect is better.

[0047] Alternatively, if Figure 1 As shown, the control device includes a check valve 51, an electric valve 52 and a pressure transmitter 53. The check valve 51, the electric valve 52 and the pressure transmitter 53 are all arranged in the steam pipeline 62. The check valve 51 is used to make the steam in the steam pipeline 62 move only in the direction of the steam mixer 61. The pressure transmitter 53 is used to detect the pressure in the steam pipeline 62. When the pressure in the steam pipeline 62 exceeds or is lower than the set value, the electric valve 52 is closed to disconnect the steam pipeline 62. It can be understood that during operation, the electric valve 52 on the steam pipeline 62 is interlocked with the circulation pump 44 and the pressure transmitter 53. When the circulation pump 44 fails or the steam pressure value is lower than the liquid level head in the anaerobic tank 1, the electric valve 52 is closed. The double protection of the check valve 51 and the electric valve 52 prevents the mixed liquid in the anaerobic tank 1 from flowing back into the steam pipeline 62, thereby improving the safety of the anaerobic tank reaction system during operation.

[0048] Furthermore, if Figure 1As shown, a first flow meter 421 is further provided on the second pipe 42, and a second flow meter 3221 is provided on the fifth pipe 322. The first flow meter 421 is used to detect the flow rate of the liquid entering the anaerobic tank 1 from the second pipe 42, and the second flow meter 3221 is used to detect the amount of sludge entering the sludge pool 33 from the fifth pipe 322, thereby improving the operation stability of the anaerobic tank reaction system.

[0049] Furthermore, if Figure 1 As shown, the anaerobic tank reaction system further includes a first three-phase separator 71 and a second three-phase separator 72, which are arranged in the anaerobic tube along the up-down direction, and the water collecting device 2 is arranged between the first three-phase separator 71 and the second three-phase separator 72. For example, the first three-phase separator 71 is arranged above the second three-phase separator 72, so that the anaerobic tank 1 is divided into three layers of upper, middle and lower layers, so that the separation effect of gas, liquid and sludge in the anaerobic tank 1 can be better.

[0050] Furthermore, if Figure 1 As shown, the anaerobic jar reaction system also includes a gas-liquid separation device 8, which includes a gas-liquid separation tank 81, a water seal tank 82, a riser 83 and an air outlet pipe. The first end of the riser 83 is in contact with the first three-phase separator 71 and / or the second three-phase separator 72, and the second end of the riser 83 is connected to the gas-liquid separation tank 81. The gas-liquid separation tank 81 is connected to the air outlet pipe through the water seal tank 82. For example, part of the lifting pipe 83 contacts the first three-phase separator 71, and another part of the lifting pipe 83 contacts the second three-phase separator 72. The lifting pipe 83 can pass the gas-liquid mixture produced by the first three-phase separator 71 and the second three-phase separator 72 into the gas-liquid separation device 8. The gas-liquid separator separates the gas and passes it into the water seal tank 82, and then the gas can be passed into the biogas cabinet 93 for collection. In addition, a water outlet 11 is provided at the upper end of the anaerobic tank 1, and the water produced by the anaerobic tank 1 can be discharged to the outside through the water outlet 11. For example, the discharged water can be passed into the anaerobic effluent collection tank 93 for collection.

[0051] like Figure 1 As shown, the specific working process of the anaerobic tank reaction system of the embodiment of the present invention is as follows.

[0052] When the anaerobic tank 1 is operating normally, all valves on the third pipe 43, the sixth pipe 45, the seventh pipe 46 and the eighth pipe 323 are closed, that is, the second valve 55, the third valve 56, the fourth valve 57 and the fifth valve 58 are closed. The leachate inlet and the effluent of the water collecting device 2 of the anaerobic tank 1 enter the circulation pump 44 through the first pipe 41, and the circulation pump 44 passes the liquid into the anaerobic tank 1 through the second pipe 42. When the temperature in the anaerobic tank 1 does not meet the process requirements, steam is passed into the steam mixer 61 to heat the leachate inlet and the mixed liquid in the anaerobic tank 1. The effluent of the circulation pump 44 returns to the anaerobic tank 1. A first flowmeter 421 is provided on the second pipe 42 for monitoring the circulation volume. The circulation pump 44 can be frequency-controlled as needed to adjust the circulating water volume. Microorganisms in the anaerobic tank 1 multiply rapidly, so it is necessary to regularly discharge sludge from the bottom of the anaerobic tank 1 to maintain a stable sludge concentration.

[0053] Specifically, there is a sludge hopper at the bottom of the anaerobic tank 1. When working normally, the third branch 3213 can be connected to the sludge in the anaerobic tank 1 through the sludge pump 34 outside the anaerobic tank 1. The sludge pump 34 is preferably a screw pump. The fifth pipe 322 is connected to the sludge pool 33 in the station for further processing. The fifth pipe 322 is provided with a second flow meter 3221 for monitoring the amount of sludge discharged.

[0054] In addition, during operation, the electric valve 52 on the steam pipeline 62 is interlocked with the circulation pump 44 and the pressure transmitter 53. When the circulation pump 44 fails or the steam pressure value is lower than the liquid level head in the anaerobic tank 1, the electric valve 52 is closed, and the double protection of the check valve 51 and the electric valve 52 is used to prevent the mixed liquid in the anaerobic tank 1 from flowing back into the steam pipeline 62.

[0055] If the liquid level of the sludge pool 33 is lower than the liquid level of the anaerobic tank 1 or the sludge pump 34 needs to be repaired during operation, the sixth valve 341 and the seventh valve 342 can be closed, and the fifth valve 58 can be opened to use the liquid level difference between the anaerobic tank 1 and the rear sludge pool 33 for gravity sludge discharge.

[0056] If the sludge discharge device 3 in the anaerobic tank 1 fails to discharge sludge smoothly during operation, the following methods can be adopted:

[0057] 1. The first branch 3211 is opened, and the sludge is discharged by using the first branch 3211 directly extending into the sludge hopper of the anaerobic tank 1.

[0058] 2. Close the sixth valve 341 and open the second valve 55, so that during the external circulation, the water outlet of the circulation pump 44 can be used to flush the fourth pipe 321 and the bottom of the anaerobic tank 1, dredge the sludge discharge device 3, and use the leachate inlet water and the first-layer three-phase separator outlet water to dilute and mix the sludge in the sludge hopper.

[0059] 3. Close the first valve 54 and the sixth valve 341, open the third valve 56 and the fourth valve 57, and the circulation pump 44 can extract the mixed liquid in the sludge hopper at the bottom of the anaerobic tank 1 through the fourth pipe 321 for low liquid level circulation to slow down the accumulation of sludge at the bottom.

[0060] In summary, the anaerobic jar reaction system of the embodiment of the present invention has the following technical effects.

[0061] 1. The anaerobic tank reaction system of the embodiment of the present invention adopts multi-point mud discharge, which can ensure that when one of the pipelines is blocked, other spare pipelines can be used for mud discharge.

[0062] 2. The anaerobic tank reaction system of the embodiment of the present invention has a bypass (eighth pipe 323) between the fourth pipe 321 and the fifth pipe 322, so that the high liquid level of the anaerobic tank 1 can be used to discharge mud by gravity when the mud pump 34 is under maintenance or in normal operation, saving operating costs.

[0063] 3. The anaerobic tank reaction system of the embodiment of the present invention is connected between the outlet pipe of the circulation pump 44 and the inlet pipe of the sludge pump 34 (i.e., the third pipe 43 is provided), so that the large flow of the circulation pump 44 can be used to flush the sludge pipeline 32 and clear the sludge pipeline 32, and the leachate inlet and the three-phase separator outlet can be used to dilute and stir the sludge in the sludge hopper.

[0064] 4. The anaerobic tank reaction system of the embodiment of the present invention is connected between the inlet of the circulation pump 44 and the inlet of the sludge pump 34, and the outlet pipe of the circulation pump 44 is connected to the outlet pipe of the sludge pump 34 (that is, the sixth pipe 45 and the seventh pipe 46 are provided). The circulation pump 44 can be used for sludge discharge, and the inlet pipe of the sludge pump 34 can be used to achieve low liquid level circulation to slow down the accumulation of sludge at the bottom.

[0065] 5. The anaerobic tank reaction system of the embodiment of the present invention is provided with an electric valve 52, a check valve 51 and a pressure transmitter 53 in the steam pipeline 62. The electric valve 52 is interlocked with the circulation pump 44 and the pressure transmitter 53. When the circulation pump 44 fails or the steam pressure is lower than the liquid level head in the anaerobic tank 1, the electric valve 52 is closed. The double protection of the check valve 51 and the electric valve 52 is used to prevent the mixed liquid in the anaerobic tank 1 from flowing back into the steam pipeline 62.

[0066] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, 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 limiting the present invention.

[0067] 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 invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] 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.

[0069] In the present invention, 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.

[0070] In the present invention, 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 invention. 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.

[0071] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to 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 tank reaction system, characterized in that: include: Anaerobic tank; A water collecting device, wherein the water collecting device is arranged in the anaerobic tank; A mud discharge device, the mud discharge device comprising a mud collector, a mud discharge pipeline and a sludge pool, the mud collector is arranged in the anaerobic tank and located at the bottom of the anaerobic tank, the first end of the mud discharge pipeline is connected to the bottom of the anaerobic tank, and the second end of the mud discharge pipeline is connected to the sludge pool; A circulation device, the circulation device comprising a first pipe, a second pipe, a third pipe and a circulation pump, wherein a first end of the first pipe is connected to at least one of the water collecting device and the wastewater source, a second end of the first pipe is connected to an inlet of the circulation pump, a first end of the second pipe is connected to an outlet of the circulation pump, a second end of the second pipe is connected to the anaerobic tank, a first end of the third pipe is connected to the outlet of the circulation pump, and a second end of the third pipe is connected to the mud discharge pipeline; A control device is used to control the connection and disconnection of the mud discharge pipeline, the first pipe, the second pipe and the third pipe.

2. The anaerobic tank reaction system according to claim 1, characterized in that: The mud discharge device also includes a mud discharge pump, and the mud discharge pipeline includes a fourth pipe and a fifth pipe, the first end of the fourth pipe is connected to the bottom of the anaerobic tank, the second end of the fourth pipe is connected to the inlet of the mud discharge pump, the first end of the fifth pipe is connected to the outlet of the mud discharge pump, the second end of the fifth pipe is connected to the sludge tank, and the second end of the third pipe is connected to the fourth pipe.

3. The anaerobic tank reaction system according to claim 2, characterized in that: The circulation device also includes a sixth pipe and a seventh pipe, the first end of the sixth pipe is connected to the first pipe, the second end of the sixth pipe is connected to the fourth pipe, the first end of the seventh pipe is connected to the outlet of the mud pump, and the second end of the seventh pipe is connected to the fifth pipe. The control device is used to control the conduction and disconnection of the sixth pipe and the seventh pipe.

4. The anaerobic tank reaction system according to claim 2, characterized in that: The mud discharge pipeline also includes an eighth pipe, a first end of the eighth pipe is connected to the fourth pipe, a second end of the eighth pipe is connected to the fifth pipe, and the control device is used to control the conduction and disconnection of the eighth pipe.

5. The anaerobic tank reaction system according to claim 2, characterized in that: The mud discharge device also includes a mud discharge bucket, which is arranged at the bottom of the anaerobic tank. The mud collector is located above the mud discharge bucket. The second end of the fourth pipe has a first branch, a second branch, and a third branch. The first branch extends into the mud discharge bucket, the second branch extends between the bottom wall of the mud discharge bucket and the bottom wall of the anaerobic tank, and the third branch is connected to the mud collector.

6. The anaerobic tank reaction system according to claim 5, characterized in that: There are at least two third branches, which are arranged at intervals along the vertical direction of the anaerobic tank.

7. The anaerobic tank reaction system according to claim 1, characterized in that: It also includes a steam heating device, which includes a steam mixer and a steam pipeline. The first end of the steam mixer is connected to the second end of the first pipe, the second end of the steam mixer is connected to the inlet of the circulating pump, the third end of the steam mixer is connected to the first end of the steam pipeline, the second end of the steam pipeline is used to connect to a steam source, and the control device is used to control the conduction and disconnection of the steam pipeline.

8. The anaerobic tank reaction system according to claim 7, characterized in that: The control device includes a check valve, an electric valve and a pressure transmitter. The check valve, the electric valve and the pressure transmitter are all arranged in the steam pipeline. The check valve is used to allow the steam in the steam pipeline to move only in the direction of the steam mixer. The pressure transmitter is used to detect the pressure in the steam pipeline. When the pressure in the steam pipeline exceeds or is lower than a set value, the electric valve is closed to disconnect the steam pipeline.

9. The anaerobic tank reaction system according to any one of claims 1 to 8, characterized in that: It also includes a first three-phase separator and a second three-phase separator. The first three-phase separator and the second three-phase separator are arranged in the anaerobic tank along the up and down direction, and the water collecting device is arranged between the first three-phase separator and the second three-phase separator.

10. The anaerobic tank reaction system according to claim 9, characterized in that: It also includes a gas-liquid separation device, which includes a gas-liquid separation tank, a water seal tank, a lifting pipe and an air outlet pipe. The first end of the lifting pipe is in contact with the first three-phase separator and / or the second three-phase separator, and the second end of the lifting pipe is connected to the gas-liquid separation tank. The gas-liquid separation tank is connected to the air outlet pipe through the water seal tank.

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