Fenton reaction type circulating well system

Abstract

The present invention relates to the field of groundwater remediation, and particularly to a Fenton reaction type circulation well system, aiming to alleviate the technical problem that Fe(OH)3 precipitation blocks the lower perforated holes and aeration heads of the circulation well in the related art. The Fenton reaction type circulation well system includes a circulation well, a circulation well assembly and a sediment treatment assembly; the circulation well assembly includes an outer well pipe, and a sludge bin is formed by surrounding between the outer well pipe and the inner wall of the circulation well; the sediment treatment assembly includes a submersible sewage pump, a sludge suction pipe and a sludge treatment component; wherein, the submersible sewage pump is arranged at the bottom of the sludge bin; one end of the sludge suction pipe is connected to the submersible sewage pump, and the other end passes out of the circulation well and is connected to the sludge treatment component. By adopting the Fenton reaction type circulation well system, the sediment can be pumped out of the well, avoiding the accumulation of sediment at the bottom of the well, thereby realizing the protection of the lower perforated holes and aeration heads, and further ensuring the circulation effect of the circulation well and the remediation effect on groundwater.

Description

Technical Field

[0001] The present invention relates to the field of groundwater remediation, and particularly to a Fenton reaction type circulation well system. Background Art

[0002] At present, the remediation technologies for benzene series contaminated groundwater can be divided into in-situ remediation technologies and ex-situ remediation technologies. Among them, the ex-situ remediation technology has high usage costs, large floor areas for ground treatment facilities, and may cause volatilization of benzene series substances, resulting in secondary pollution to the surrounding environment, thereby affecting human production and life. The in-situ remediation technology, on the other hand, is simple to operate, causes little ground disturbance, has controllable remediation costs, and can effectively avoid the harm of secondary pollution to operators and the surrounding environment.

[0003] Among many groundwater in-situ remediation technologies, the groundwater circulation well technology has good application prospects in future in-situ organic pollution site remediation projects due to its effective remediation of volatile organic pollutants. In addition, in-situ chemical oxidation technology is also another effective means to solve benzene series pollution in groundwater. However, since the situation of single pollutants in domestic polluted sites is relatively rare, most polluted sites have a mixture of multiple pollutants. In this case, a single groundwater circulation well technology or in-situ chemical oxidation technology is difficult to handle. In actual operation, it is found that when the two are used in combination, a remediation effect of 1 + 1 > 2 can be achieved, and multiple pollutants can be removed simultaneously.

[0004] It should be pointed out here that the combination of the above two remediation technologies has also caused another problem, that is, Fe(OH)3 precipitation will occur during the drug injection process, and with the accumulation of the precipitation, it will cause blockage of the lower perforated holes and aeration heads of the circulation well, which will seriously affect the circulation effect of the circulation well and thus seriously affect the remediation effect. Summary of the Invention

[0005] The purpose of the present invention is to provide a Fenton reaction type circulation well system to alleviate the technical problem of Fe(OH)3 precipitation blocking the lower perforated holes and aeration heads of the circulation well in related technologies.

[0006] To solve the above technical problems, the technical solution provided by the present invention is as follows:

[0007] The Fenton reaction type circulation well system provided by the present invention includes: a circulation well, a circulation well assembly, and a sediment treatment assembly;

[0008] The circulation well assembly includes an outer well pipe, and a sludge bin is formed by enclosing between the outer well pipe and the inner wall of the circulation well;

[0009] The sediment treatment assembly includes a submersible sewage pump, a sludge suction pipe, and a sludge treatment component;

[0010] Among them, the submersible sewage pump is arranged at the bottom of the sludge bin;

[0011] One end of the sludge suction pipe is connected to the submersible sewage pump, and the other end extends out of the circulation well and is connected to the sludge treatment assembly.

[0012] Furthermore, the sludge treatment assembly includes a mixing tank, a mixing paddle, a PAC medicine tank, and a first medicine adding pipe;

[0013] The sludge suction pipe is communicated with the mixing tank;

[0014] The mixing paddle is arranged in the mixing tank;

[0015] One end of the first medicine adding pipe extends into the mixing tank, and the other end extends out of the mixing tank and is communicated with the PAC medicine tank.

[0016] Furthermore, the sludge treatment assembly further includes a first sludge pipe, a first sludge pump, and a plate and frame filter press;

[0017] The first sludge pipe is connected between the mixing tank and the plate and frame filter press, and one end of the first sludge pipe communicated with the mixing tank is close to the bottom of the mixing tank;

[0018] The first sludge pump is arranged on the first sludge pipe.

[0019] Furthermore, the sludge treatment assembly further includes a horizontal flow sedimentation tank and a first supernatant pipe;

[0020] One end of the first supernatant pipe is communicated with the mixing tank and is close to the top of the mixing tank, and the other end is communicated with the horizontal flow sedimentation tank.

[0021] Furthermore, the sludge treatment assembly further includes a reflux well and a second supernatant pipe;

[0022] One end of the second supernatant pipe is communicated with the horizontal flow sedimentation tank and is close to the top of the horizontal flow sedimentation tank, and the other end extends into the reflux well;

[0023] A valve is arranged on the second supernatant pipe.

[0024] Furthermore, the sludge treatment assembly further includes a second sludge pipe and a second sludge pump;

[0025] The second sludge pipe is connected between the horizontal flow sedimentation tank and the plate and frame filter press, and one end of the second sludge pipe communicated with the horizontal flow sedimentation tank is close to the bottom of the horizontal flow sedimentation tank;

[0026] The second sludge pump is arranged on the second sludge pipe.

[0027] Furthermore, the sludge treatment assembly further includes a sludge pool, a third sludge pipe, and a lift pump;

[0028] Both the first sludge pipe and the second sludge pipe communicate with the sludge tank;

[0029] One end of the third sludge pipe communicates with the sludge tank, and the other end is connected to the plate and frame filter press;

[0030] The lift pump is arranged on the third sludge pipe.

[0031] Further, along the longitudinal direction of the circulation well, an overflow groove is formed by the depression of the side wall of the circulation well, and a sludge bin is formed by enclosing between the groove surface of the overflow groove and the outer side wall of the outer well pipe;

[0032] The precipitation treatment assembly further includes a push flow plate and a driving assembly;

[0033] The push flow plate is arranged inside the outer well pipe, at the bottom of the outer well pipe, and is directly opposite to the sludge bin;

[0034] The driving assembly is in transmission connection with the push flow plate to drive the push flow plate to move in a direction close to or away from the sludge bin.

[0035] Further, the circulation well assembly further includes a flange, and the flange is arranged at the wellhead of the circulation well;

[0036] A lifting rope is arranged on the flange, and the hanging end of the lifting rope is connected to the submersible sewage pump.

[0037] Further, the circulation well assembly further includes an inner well pipe, and the inner well pipe is arranged inside the outer well pipe;

[0038] The Fenton reaction type circulation well system further includes a chemical dosing assembly, and the chemical dosing assembly includes a Fenton chemical dosing tank, a second chemical dosing pipe, and a chemical dosing pump;

[0039] Wherein, one end of the second chemical dosing pipe extends into the inner well pipe, and the other end passes out of the circulation well and communicates with the Fenton chemical dosing tank;

[0040] The chemical dosing pump is arranged on the second chemical dosing pipe.

[0041] Based on the above technical solutions, the technical effects that can be achieved by the Fenton reaction type circulation well system provided by the present invention are as follows:

[0042] The Fenton reaction type circulation well system provided by the present invention includes a circulation well, a circulation well assembly, and a precipitation treatment assembly; the circulation well assembly includes an outer well pipe, and a sludge bin is formed by enclosing between the outer well pipe and the inner wall of the circulation well; the precipitation treatment assembly includes a submersible sewage pump, a sludge suction pipe, and a sludge treatment component; wherein, the submersible sewage pump is arranged at the bottom of the sludge bin; one end of the sludge suction pipe is connected to the submersible sewage pump, and the other end passes out of the circulation well and is connected to the sludge treatment component.

[0043] In this Fenton reaction type circular well system, a sludge bin is formed between the outer well pipe and the inner wall of the circular well. Through the lower perforated holes, the sludge bin is communicated with the outer well pipe. The submersible sewage pump at the bottom of the sludge bin can pump the relevant sediment out of the circular well through the sludge suction pipe, and the sediment is treated by the sludge treatment component. It can be seen that by adopting this Fenton reaction type circular well system, the sediment can be pumped out of the well, avoiding the accumulation of sediment at the bottom of the well, thereby realizing the protection of the lower perforated holes and the aeration head, and further ensuring the circulation effect of the circular well and the groundwater remediation effect. Description of the Drawings

[0044] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0045] Figure 1 Schematic diagram of the Fenton reaction type circular well system provided by the embodiment of the present invention;

[0046] Figure 2 Top view of the cooperation between the well pipe and the circular well provided by the embodiment of the present invention;

[0047] Figure 3 Application schematic diagram of the flow pushing plate provided by the embodiment of the present invention.

[0048] Reference numerals: 1 - outer well pipe; 2 - sludge bin; 3 - submersible sewage pump; 4 - sludge suction pipe; 5 - mixing tank; 6 - mixing paddle; 7 - PAC medicine box; 8 - first medicine adding pipe; 9 - first sludge pipe; 10 - first sludge pump; 11 - plate and frame filter press; 12 - horizontal flow sedimentation tank; 13 - first supernatant pipe; 14 - return well; 15 - second supernatant pipe; 16 - valve; 17 - second sludge pipe; 18 - second sludge pump; 19 - sludge tank; 20 - third sludge pipe; 21 - lift pump; 22 - flow pushing plate; 23 - flange; 24 - lifting rope; 25 - inner well pipe; 26 - Fenton medicine adding box; 27 - second medicine adding pipe; 28 - medicine adding pump; 29 - power supply; 30 - air compressor; 31 - cable; 32 - aeration pipe; 33 - activated carbon adsorption box; 34 - tail gas pipe; 35 - upper perforated holes; 36 - lower perforated holes; 37 - aeration head; 38 - compression spring; 39 - pulley; 40 - towing rope; 41 - towing driving part. Detailed Embodiments

[0049] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but is merely representative of selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0051] The following will detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0052] Among numerous in-situ groundwater remediation technologies, the groundwater circulation well technology has good application prospects in future in-situ organic contaminated site remediation projects due to its effective remediation of volatile organic pollutants. In addition, in-situ chemical oxidation technology is also another effective means to solve the problem of benzene series pollution in groundwater. However, since the situation of single pollutants in domestic contaminated sites is relatively rare, most contaminated sites have a mixture of multiple pollutants. In this case, a single groundwater circulation well technology or in-situ chemical oxidation technology is difficult to cope with. It has been found in actual operation that when the two are used in combination, a remediation effect of 1 + 1 > 2 can be achieved, and multiple pollutants can be removed simultaneously.

[0053] It should be noted here that the combination of the above two remediation technologies also brings another problem, that is, Fe(OH)3 precipitation will occur during the drug injection process, and with the accumulation of the precipitation, it will cause the problem of blockage of the slotted holes and aeration heads at the lower part of the circulation well, which will seriously affect the circulation effect of the circulation well and thus seriously affect the remediation effect.

[0054] In view of this, the present invention provides a Fenton reaction type circulation well system, including a circulation well, a circulation well assembly and a sediment treatment assembly; the circulation well assembly includes an outer well pipe 1, and a sludge bin 2 is formed by surrounding between the outer well pipe 1 and the inner wall of the circulation well; the sediment treatment assembly includes a submersible sewage pump 3, a sludge suction pipe 4 and a sludge treatment component; wherein, the submersible sewage pump 3 is arranged at the bottom of the sludge bin 2; one end of the sludge suction pipe 4 is connected to the submersible sewage pump 3, and the other end passes out of the circulation well and is connected to the sludge treatment component.

[0055] In this Fenton reaction type circulation well system, a sludge bin 2 is formed between the outer well pipe 1 and the inner wall of the circulation well. Through the lower perforated holes 36, the sludge bin 2 is communicated with the outer well pipe 1. The submersible sewage pump 3 at the bottom of the sludge bin 2 can pump the relevant sediment out of the circulation well through the sludge suction pipe 4, and the sediment is processed by the sludge treatment assembly. It can be seen that by using this Fenton reaction type circulation well system, the sediment can be pumped out of the well to avoid the accumulation of sediment at the bottom of the well, thereby protecting the lower perforated holes 36 and the aeration head 37, and further ensuring the circulation effect of the circulation well and the groundwater remediation effect.

[0056] The following combines Figures 1 to 3 to detail the structure and shape of the Fenton reaction type circulation well system provided in this embodiment:

[0057] Regarding the circulation well assembly, specifically:

[0058] Referring to Figure 1 , the circulation well assembly further includes a flange 23, an inner well pipe 25, an air compressor 30, an aeration pipe 32, an activated carbon adsorption box 33, and an exhaust pipe 34. Among them, the flange 23 is arranged at the wellhead of the circulation well, and the submersible sewage pump 3 is hoisted on the flange 23 through a lifting rope 24. The inner well pipe 25 is inserted into the outer well pipe 1, and upper perforated holes 35 and lower perforated holes 36 are provided in the upper and lower parts of the outer well pipe 1. One end of the aeration pipe 32 is connected to the air compressor 30, the other end is provided with an aeration head 37, and it passes through the flange 23 and extends into the inner well pipe 25. One end of the exhaust pipe 34 is connected to the activated carbon adsorption box 33, and the other end is communicated with the outer well pipe 1.

[0059] With the above design, a circulation well assembly based on the circulation well repair principle is formed. By aerating in the well, the groundwater can be circulated, and the volatile and semi-volatile organic compounds dissolved in the groundwater are carried into the inner well and removed by aeration stripping. An in-situ vertical groundwater circulation flow is generated in the aquifer around the well, and the pressure gradient difference between the two leaky screens in the well is the driving force of this circulation flow.

[0060] In the embodiment of the present application, referring to Figure 1 , the Fenton reaction type circulation well system further includes a chemical dosing assembly, and the chemical dosing assembly includes a Fenton chemical dosing tank 26, a second chemical dosing pipe 27, and a chemical dosing pump 28. Among them, one end of the second chemical dosing pipe 27 extends into the inner well pipe 25, and the other end passes out of the circulation well and is communicated with the Fenton chemical dosing tank 26. The chemical dosing pump 28 is arranged on the second chemical dosing pipe 27.

[0061] Here, the chemical dosing assembly cooperates with the circulation well assembly, that is, the combination of in-situ chemical oxidation technology and groundwater circulation well technology is realized. In this way, multiple pollutants can be removed simultaneously, and a repair effect of 1 + 1 > 2 can be produced.

[0062] Furthermore, referring to Figure 1 andFigure 2 Along the longitudinal direction of the circular well, the side wall of the circular well is recessed to form a flow-through groove, and a sludge bin 2 is formed by enclosing between the groove surface of the flow-through groove and the outer side wall of the outer well pipe 1; the sedimentation treatment assembly further includes a push plate 22 and a driving assembly; the push plate 22 is arranged inside the outer well pipe 1, at the bottom of the outer well pipe 1, and is directly opposite to the sludge bin 2; the driving assembly is in transmission connection with the push plate 22 to drive the push plate 22 to move in a direction close to or away from the sludge bin 2.

[0063] Specifically, referring to Figure 3 As shown, the driving assembly includes a compression spring 38, a pulley 39, a traction rope 40 and a traction driving member 41; among them, there are multiple compression springs 38, which are connected between the surface of the push plate 22 facing away from the sludge bin 2 and the inner wall of the outer well pipe 1; there are two groups of pulleys 39, and in each group, one pulley 39 is inside the outer well pipe 1 and the other pulley 39 is outside the circular well; the traction rope 40 corresponds to each pulley 39 in each group, one end of which is connected to the push plate 22, and the other end bypasses the corresponding pulley 39 and is connected to the traction driving member 41 outside the circular well. Here, the principle of the traction driving member 41 is equivalent to that of a winch.

[0064] Combined with Figure 3 As shown, when the amount of sludge at the bottom of the outer well pipe 1 is small, the traction driving member 41 pulls the push plate 22 to move to the right through the traction rope 40, and at the same time the compression spring 38 contracts. When the amount of sludge at the bottom of the outer well pipe 1 reaches a certain level, the traction driving member 41 releases the traction rope 40. At this time, under the action of the restoring force of the compression spring 38, the push plate 22 moves to the left, thereby pushing the sludge towards the sludge bin 2, so that the sludge does not accumulate at a relatively far distance from the submersible pump 3 and can be timely discharged from the well body. In this way, the effectiveness of the operation of the submersible pump 3 is ensured, and the precipitation is prevented from blocking the lower perforated holes 36 and the aeration heads 37.

[0065] Regarding the sludge treatment component, specifically:

[0066] Referring to Figure 1 As shown, the sludge treatment component includes a mixing tank 5, a mixing paddle 6, a PAC medicine tank 7 and a first medicine adding pipe 8; the sludge suction pipe 4 is communicated with the mixing tank 5; the mixing paddle 6 is arranged inside the mixing tank 5; one end of the first medicine adding pipe 8 extends into the mixing tank 5, and the other end passes out of the mixing tank 5 and is communicated with the PAC medicine tank 7.

[0067] Specifically, the PAC dosing tank is filled with PAC (Polyaluminum chloride) agent. Through the agitation of the agitator paddle 6, the muddy water mixture pumped up by the submersible pump 3 can be fully mixed with the PAC agent. This PAC agent is a highly efficient flocculant, which is yellow, light yellow, dark brown or dark gray in color, in the form of resinous solid, and has strong bridging adsorption performance. During the hydrolysis process, physical and chemical processes such as coagulation, adsorption and precipitation will occur. Here, the muddy water mixture can produce precipitation and deposit in the agitation tank 5.

[0068] Further, continue to refer to Figure 1 , the sludge treatment component further includes a first sludge pipe 9, a first sludge pump 10, a horizontal flow sedimentation tank 12, a first supernatant pipe 13, a second sludge pipe 17, a second sludge pump 18, a sludge tank 19, a third sludge pipe 20, a lift pump 21 and a plate and frame filter press 11; wherein, one end of the first sludge pipe 9 is communicated with the agitation tank 5 and is close to the bottom of the agitation tank 5, and the other end is communicated with the sludge tank 19, and the first sludge pump 10 is arranged on the first sludge pipe 9; one end of the first supernatant pipe 13 is communicated with the agitation tank 5 and is close to the top of the agitation tank 5, and the other end is communicated with the horizontal flow sedimentation tank 12; one end of the second sludge pipe 17 is communicated with the horizontal flow sedimentation tank 12 and is close to the bottom of the horizontal flow sedimentation tank 12, and the other end is communicated with the sludge tank 19, and the second sludge pump 18 is arranged on the second sludge pipe 17; one end of the third sludge pipe 20 is communicated with the sludge tank 19, and the other end is connected to the plate and frame filter press 11; the lift pump 21 is arranged on the third sludge pipe 20.

[0069] Specifically, the first sludge pump 10 can pump the sludge in the agitation tank 5 away through the first sludge pipe 9 and transfer it to the sludge tank 19; the supernatant in the agitation tank 5 flows to the horizontal flow sedimentation tank 12 through the first supernatant pipe 13. After a period of time, precipitation will form again at the bottom of the horizontal flow sedimentation tank 12. This precipitation is also transferred to the sludge tank 19 under the combined action of the second sludge pump 18 and the second sludge pipe 17; under the cooperation of the lift pump 21 and the third sludge pipe 20, the sediment in the sludge tank 19 is lifted to the plate and frame filter press 11 in the form of a muddy water mixture. The plate and frame filter press 11 can dehydrate the sludge to form mud cakes, which can then be transported out for disposal.

[0070] Further, please continue to refer to Figure 1 , the sludge treatment component further includes a reflux well 14 and a second supernatant pipe 15; one end of the second supernatant pipe 15 is communicated with the horizontal flow sedimentation tank 12 and is close to the top of the horizontal flow sedimentation tank 12, and the other end extends into the reflux well 14; a valve 16 is arranged on the second supernatant pipe 15. The supernatant in the horizontal flow sedimentation tank 12 can flow into the reflux well 14 through the second supernatant pipe 15, and the valve 16 controls the amount of returned water here.

[0071] It should be added here that for each electrical device in the Fenton reaction type circulation well system, such as the submersible sewage pump 3, the first sludge pump 10, the plate and frame filter press 11, etc., they are powered by the power supply 29, and the power supply 29 is connected to each device through the cable 31.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A Fenton reaction type circulating well system, characterized in that, Including: A circular well, a circular well assembly and a sedimentation treatment assembly; The circular well assembly includes an outer well pipe (1), and a sludge bin (2) is formed between the outer well pipe (1) and the inner wall of the circular well; The sedimentation treatment assembly includes a submersible sewage pump (3), a sludge suction pipe (4) and a sludge treatment component; Wherein, the submersible sewage pump (3) is arranged at the bottom of the sludge bin (2); One end of the sludge suction pipe (4) is connected to the submersible sewage pump (3), and the other end penetrates out of the circular well and is connected to the sludge treatment component; Along the longitudinal direction of the circular well, an overflow groove is formed by the depression of the side wall of the circular well, and the sludge bin (2) is formed between the groove surface of the overflow groove and the outer side wall of the outer well pipe (1); The sedimentation treatment assembly further includes a flow pusher plate (22) and a driving component; The flow pusher plate (22) is arranged inside the outer well pipe (1), at the bottom of the outer well pipe (1), and is directly opposite to the sludge bin (2); The driving component is in transmission connection with the flow pusher plate (22) to drive the flow pusher plate (22) to move in a direction close to or away from the sludge bin (2).

2. The Fenton reaction type circulating well system according to claim 1, characterized in that, The sludge treatment component includes a stirring tank (5), a stirring paddle (6), a PAC medicine tank (7) and a first medicine adding pipe (8); The sludge suction pipe (4) is communicated with the stirring tank (5); The stirring paddle (6) is arranged inside the stirring tank (5); One end of the first medicine adding pipe (8) extends into the stirring tank (5), and the other end penetrates out of the stirring tank (5) and is communicated with the PAC medicine tank (7).

3. The Fenton reaction type circulating well system according to claim 2, characterized in that, The sludge treatment component further includes a first sludge pipe (9), a first sludge pump (10) and a plate and frame filter press (11); The first sludge pipe (9) is connected between the stirring tank (5) and the plate and frame filter press (11), and the end of the first sludge pipe (9) communicated with the stirring tank (5) is close to the bottom of the stirring tank (5); The first sludge pump (10) is arranged on the first sludge pipe (9).

4. The Fenton reaction type circulation well system according to claim 3, characterized in that, The sludge treatment component further includes a horizontal flow sedimentation tank (12) and a first supernatant pipe (13); One end of the first supernatant pipe (13) is communicated with the stirring tank (5), close to the top of the stirring tank (5), and the other end is communicated with the horizontal flow sedimentation tank (12).

5. The Fenton reaction type circulating well system according to claim 4, wherein The sludge treatment component further includes a reflux well (14) and a second supernatant pipe (15); One end of the second supernatant pipe (15) is communicated with the horizontal flow sedimentation tank (12), close to the top of the horizontal flow sedimentation tank (12), and the other end extends into the reflux well (14); A valve (16) is arranged on the second supernatant pipe (15).

6. The Fenton reaction type circulating well system according to claim 4, characterized in that The sludge treatment component further includes a second sludge pipe (17) and a second sludge pump (18); The second sludge pipe (17) is connected between the horizontal flow sedimentation tank (12) and the plate and frame filter press (11), and the end of the second sludge pipe (17) communicated with the horizontal flow sedimentation tank (12) is close to the bottom of the horizontal flow sedimentation tank (12); The second sludge pump (18) is arranged on the second sludge pipe (17).

7. The Fenton reaction type circulation well system according to claim 6, characterized in that, The sludge treatment component further includes a sludge tank (19), a third sludge pipe (20), and a lift pump (21); Both the first sludge pipe (9) and the second sludge pipe (17) communicate with the sludge tank (19); One end of the third sludge pipe (20) communicates with the sludge tank (19), and the other end is connected to the plate and frame filter press (11); The lift pump (21) is arranged on the third sludge pipe (20).

8. The Fenton reaction type circulation well system according to claim 1, characterized in that The circulation well assembly further includes a flange (23), and the flange (23) is arranged at the wellhead of the circulation well; A lifting rope (24) is arranged on the flange (23), and the hanging end of the lifting rope (24) is connected to the submersible sewage pump (3).

9. The Fenton reaction type circulating well system according to any one of claims 1 to 8, characterized in that The circulation well assembly further includes an inner well pipe (25), and the inner well pipe (25) is arranged inside the outer well pipe (1); The Fenton reaction type circulation well system further includes a chemical dosing assembly, and the chemical dosing assembly includes a Fenton chemical dosing tank (26), a second chemical dosing pipe (27), and a chemical dosing pump (28); Wherein, one end of the second chemical dosing pipe (27) extends into the inner well pipe (25), and the other end passes out of the circulation well and communicates with the Fenton chemical dosing tank (26); The chemical dosing pump (28) is arranged on the second chemical dosing pipe (27).

Images