A brine storage pond sludge treatment method and treatment system

Abstract

The present invention provides a brine storage tank sludge treatment method and treatment system, which solves the technical problems of high investment cost and need to stop the operation of the sludge treatment method in the prior art. The method comprises the following steps: disconnecting the wastewater pipeline from the first water pump of the first regenerated wastewater storage tank to the fresh water tank, and connecting the disconnected wastewater pipeline outlet to the mud pump of the brine storage tank through the first pipeline; disconnecting the wastewater pipeline from the first water pump of the first regenerated wastewater storage tank to the primary refined brine process, and connecting the disconnected wastewater pipeline outlet to the primary brine slag tank through the second pipeline; thereby forming a brine storage tank sludge extraction pipeline from the brine storage tank through the first pipeline and the second pipeline to the primary brine slag tank. The method of the present invention utilizes the existing electrolysis device resin tower regeneration wastewater pipeline to intermittently return the sludge in the brine storage tank to the primary brine slag tank, so as to achieve the purpose of cleaning the brine storage tank sludge, and only requires a one-time investment, and has a high reuse rate.

Description

Technical Field

[0001] The invention relates to the technical field of brine storage pond silt removal, and in particular to a brine storage pond sludge treatment method and treatment system. Background Art

[0002] During the process of refining and producing well salt brine, chlor-alkali enterprises need to build brine storage pools for storing brine and buffering production. As the operation time increases, the silt carried by the returned brine continues to deposit, and the effective volume of the brine pool continues to decrease. Once the vacancy in the brine pool decreases sharply, the salt well fails or is stopped for overhaul, the pressure relief and drainage of the salt well will be unbalanced, posing a threat to the full-load and stable production of the enterprise. At present, for the brine storage pools of well salt chlor-alkali enterprises, the mud reinjection well method is generally used to clean the silt in the brine storage pool, that is, a high-pressure plunger pump is used to dilute the salt mud and then inject water into the well to achieve the purpose of dredging, and the salt mud is stored in the underground melt cavity. The mud reinjection well method has high requirements for the melt cavity, and reinjection can only be carried out for abandoned well groups or well groups with large melt cavities.

[0003] However, the mud reinjection well method requires a high-pressure mud plunger pump specially used for transporting salt mud. The current brine pump is a clean water pump, which cannot transport viscous salt mud with a large solid content. In addition, the device using the mud reinjection well method must be completely isolated from the currently operating system, so it is necessary to re-lay the pipeline from the freshwater pool to the pump inlet. If the company adopts the mixed injection well method, all brine pumps share a water injection main pipe, and a special mud injection pipeline needs to be laid, which has a high investment cost. In addition, during the operation of this method, if the solid content of the silt is not properly controlled, it is easy to block the surface pipeline, the technical casing of the well group and the melt cavity. In the later stage of operation, a large amount of silt is injected into the well, and the brine returned may be muddy. Summary of the invention

[0004] The purpose of the present invention is to provide a brine storage pond sludge treatment method and treatment system to solve the technical problems of high investment cost and need to stop the operation of the sludge treatment method in the prior art. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a method for treating brine storage pond sludge, comprising the following steps:

[0007] Disconnect the wastewater pipeline from the first water pump of the first regenerated wastewater storage tank to the freshwater tank, and connect the disconnected wastewater pipeline outlet to the mud pump of the brine storage tank through the first pipeline;

[0008] Disconnect the wastewater pipeline from the first water pump of the first regenerated wastewater storage tank to the primary refined brine process, and connect the disconnected wastewater pipeline outlet to the primary brine slag pool through the second pipeline; thereby forming a brine storage tank sludge extraction pipeline from the brine storage tank through the first pipeline and the second pipeline to the primary brine slag pool.

[0009] According to a preferred embodiment, the processing method further comprises the following steps:

[0010] A blind plate is provided at the outlet pipeline of the first water pump of the first regenerated wastewater storage tank, so that the return pipeline from the first water pump to the first regenerated wastewater storage tank can return normally;

[0011] The first drain valve of the first regeneration wastewater storage tank is connected to the second drain valve of the second regeneration wastewater storage tank through the third pipeline, so that when the resin tower is regenerated, the waste liquid circulated and neutralized in the first regeneration wastewater storage tank enters the second regeneration wastewater storage tank through the first drain valve, the third pipeline and the second drain valve, and is transported to the fresh water tank through the second water pump of the second regeneration wastewater storage tank.

[0012] According to a preferred embodiment, the processing method further comprises the following steps:

[0013] The plate-and-frame filtrate pipeline of the filtrate tank is connected to the outlet pipeline of the second water pump of the second regenerated wastewater storage tank to transport it to the fresh water tank through the outlet pipeline.

[0014] The present invention also provides a brine storage tank sludge treatment system, comprising: a brine storage tank, a first regenerated wastewater storage tank and a primary brine slag tank, wherein a mud pump is provided in the brine storage tank, and the outlet of the mud pump is connected to the wastewater pipeline outlet disconnected from the first water pump of the first regenerated wastewater storage tank to the fresh water tank through a first pipeline; the wastewater pipeline outlet disconnected from the first water pump of the first regenerated wastewater storage tank to the primary refined brine process is connected to the primary brine slag tank through a second pipeline; so as to form a brine storage tank sludge extraction pipeline from the brine storage tank through the first pipeline and the second pipeline to the primary brine slag tank.

[0015] According to a preferred embodiment, a blind plate is provided at the outlet pipeline of the first water pump of the first regenerated wastewater storage tank to form a reflux pipeline for the first regenerated wastewater storage tank and the first water pump to reflux to the first regenerated wastewater storage tank through a reflux pipeline.

[0016] According to a preferred embodiment, the first drain valve of the first regeneration wastewater storage tank is connected to the second drain valve of the second regeneration wastewater storage tank via a third pipeline.

[0017] According to a preferred embodiment, the plate-frame filtrate pipeline of the filtrate tank is connected to the outlet pipeline of the second water pump of the second regenerated wastewater storage tank.

[0018] According to a preferred embodiment, the mud pump is a vertical mud pump, and the mud pump is fixed to the brine storage tank through a bracket.

[0019] According to a preferred embodiment, the brine storage tank is connected to an air compressor.

[0020] Based on the above technical scheme, the brine storage pond sludge treatment method and treatment system of the present invention have at least the following technical effects:

[0021] The brine storage pool sludge treatment method of the present invention utilizes the regeneration wastewater pipeline of the existing electrolysis device resin tower, disconnects the wastewater pipeline from the first water pump of the first regeneration wastewater storage tank to the fresh water tank, and connects the disconnected wastewater pipeline outlet to the mud pump of the brine storage pool through the first pipeline; then disconnects the wastewater pipeline from the first water pump of the first regeneration wastewater storage tank to the primary refined brine process, and connects the disconnected wastewater pipeline outlet to the primary brine slag pool through the second pipeline; thereby forming a brine storage pool sludge extraction pipeline from the brine storage pool through the first pipeline and the second pipeline to the primary brine slag pool. The treatment method of the present invention utilizes the existing electrolysis device resin tower regeneration wastewater pipeline to intermittently return the sludge in the brine storage pool to the primary brine slag pool, so as to achieve the purpose of cleaning the brine storage pool sludge. The method only requires a one-time investment, has a high reuse rate, can repeatedly desilt the brine storage pool, and is safer, more reliable, and more economical than other existing methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention 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 only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of the brine storage tank sludge treatment system of the present invention.

[0024] In the figure: 1- brine storage tank; 2- fresh water tank; 3- first water pump; 4- first regenerated wastewater storage tank; 5- second water pump; 6- second regenerated wastewater storage tank; 7- reflux pipeline; 8- blind plate; 10 first pipeline; 11- second pipeline; 12- primary brine slag tank; 13- first water pump; 14- first drain valve; 15- second drain valve; 16- filtrate tank; 17- plate and frame filtrate pipeline; 18- mud pump; 19- air compressor; 20- bracket. DETAILED DESCRIPTION

[0025] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0026] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings.

[0027] Example 1

[0028] This embodiment provides a method for treating brine storage pond sludge, comprising the following steps:

[0029] Step 1: disconnect the wastewater pipeline from the first water pump 3 of the first regenerated wastewater storage tank 4 to the freshwater tank 2, and connect the disconnected wastewater pipeline outlet to the mud pump 18 of the brine storage tank 1 through the first pipeline 10. Preferably, when disconnecting the wastewater pipeline from the first regenerated wastewater storage tank 4 to the freshwater tank, lead the disconnected wastewater pipeline outlet to the ground, and then connect the mud pump 18 to the disconnected wastewater pipeline outlet through the first pipeline 10. Preferably, the first pipeline 10 can be a temporary rubber hose.

[0030] Step 2: disconnect the wastewater pipeline from the first water pump 3 of the first regenerated wastewater storage tank 4 to the primary refined brine process, and connect the disconnected wastewater pipeline outlet to the primary brine slag pool 12 through the second pipeline 11; thereby forming a brine storage tank sludge extraction pipeline from the brine storage tank 1 through the first pipeline 10 and the second pipeline 11 to the primary brine slag pool 12. Preferably, when disconnecting the wastewater pipeline from the first water pump of the first regenerated wastewater storage tank to the primary refined brine process, the first water pump of the first regenerated wastewater storage tank can be disconnected through the flange of the primary refined brine process, and a pipeline can be laid from the flange to the primary brine slag pool.

[0031] Preferably, after the sludge is sent to the primary brine slag pool, the water is extracted by a plate and frame filter press or a centrifuge and then the sludge can be sent out for treatment.

[0032] Step 3: A blind plate 8 is provided on the outlet pipe of the first water pump 3 of the first regenerated wastewater storage tank 4 to enable normal reflux through the reflux pipe 7 from the first water pump 3 to the first regenerated wastewater storage tank 4; to ensure that when the resin tower is regenerated, the wastewater in the first regenerated wastewater storage tank can be refluxed and neutralized through the first water pump and the reflux pipe, so as not to affect the treatment process of the original first regenerated wastewater of the resin tower regeneration.

[0033] Step 4: Connect the first drain valve 14 of the first regeneration wastewater storage tank 4 and the second drain valve 15 of the second regeneration wastewater storage tank 6 through the third pipeline 13, so that when the resin tower is regenerated, the waste liquid circulated and neutralized in the first regeneration wastewater storage tank 4 enters the second regeneration wastewater storage tank 6 through the first drain valve 14, the third pipeline 13 and the second drain valve 15, and is transported to the freshwater tank 2 through the second water pump 5 of the second regeneration wastewater storage tank 6. This ensures that the treated wastewater in the first regeneration wastewater storage tank 4 can be transported to the freshwater tank 2 by the second regeneration wastewater storage tank, without affecting the treatment efficiency of the second regeneration wastewater storage tank.

[0034] Step 5: Connect the plate-frame filtrate pipeline 17 of the filtrate pool 16 to the outlet pipeline 21 of the second water pump 5 of the second regenerated wastewater storage tank 6 to transport the wastewater to the freshwater pool 2 through the outlet pipeline 21 .

[0035] Preferably, the solid content of the brine storage pond mud can be appropriately adjusted by the amount of brine in the brine pond.

[0036] Therefore, the brine storage tank sludge treatment method of the present invention utilizes the existing electrolysis device resin tower regeneration wastewater to the freshwater tank pipeline, and intermittently returns the sludge in the brine storage tank to the primary brine slag tank to achieve the purpose of cleaning the brine storage tank sludge, and then the primary brine slag tank is filtered (centrifuged) through a plate and frame filter press (turbine centrifuge) and then transported out for treatment together with the salt sludge. Thereby achieving the purpose of dredging and increasing the effective volume of the brine storage tank. The treatment method of the present invention does not require parking, and while treating the brine storage tank sludge, the normal operation of other processes can be guaranteed. At the same time, this method only requires a one-time investment, has a high reuse rate, and can repeatedly dredge the brine storage tank. Compared with other existing methods, it is safer, more reliable, and more economical.

[0037] Example 2

[0038] like Figure 1 As shown, this embodiment provides a brine storage tank sludge treatment system, including a brine storage tank 1, a first regeneration wastewater storage tank 4 and a primary brine slag tank 12. Among them, a mud pump 18 is provided in the brine storage tank 1, and the outlet of the mud pump 18 is connected to the wastewater pipeline outlet disconnected from the first water pump 3 of the first regeneration wastewater storage tank 4 to the fresh water tank 2 through a first pipeline 10. The wastewater pipeline outlet disconnected from the first water pump 3 of the first regeneration wastewater storage tank 4 to the primary refined brine process is connected to the primary brine slag tank 12 through a second pipeline 11; so as to form a brine storage tank sludge extraction pipeline from the brine storage tank 1 through the first pipeline 10 and the second pipeline 11 to the primary brine slag tank 12. Preferably, a plate and frame filter press or a centrifuge is provided in the primary brine slag tank. During treatment, the sludge in the brine storage tank 1 is pumped into the primary brine slag tank through the first pipeline and the second pipeline by the mud pump, and the water is separated by the plate and frame filter press or the centrifuge in the primary brine slag tank, and then it can be sent out for treatment.

[0039] Preferably, a blind plate 8 is provided at the outlet pipeline of the first water pump 3 of the first regenerated wastewater storage tank 4, so that the first regenerated wastewater storage tank 4 and the first water pump 3 can be refluxed to the reflux pipeline of the first regenerated wastewater storage tank 4 through the reflux pipeline 7 to operate normally. To ensure that the wastewater in the original first regenerated wastewater storage tank is normally circulated and neutralized. Preferably, the first drain valve 14 of the first regenerated wastewater storage tank 4 is connected to the second drain valve 15 of the second regenerated wastewater storage tank 6 through the third pipeline 13. So that when the resin tower is regenerated, the acid and alkali waste liquid is circulated and neutralized by the first water pump of the first regenerated wastewater storage tank, and after the neutralization is completed, it enters the second regenerated wastewater storage tank through the first drain valve and the second drain valve, and is transported to the fresh water tank by the second water pump of the second regenerated wastewater storage tank. To ensure the normal operation of the resin tower regeneration program.

[0040] Preferably, the plate-frame filtrate pipeline 17 of the filtrate tank 16 is connected to the outlet pipeline 21 of the second water pump 5 of the second regenerated wastewater storage tank 6. In order to change the filtrate pipeline from the original filtrate tank to the outlet pipeline of the first regenerated wastewater storage tank to the outlet pipeline of the second water pump of the second regenerated wastewater storage tank, so as to ensure the normal operation of the filtrate tank.

[0041] Preferably, the mud pump 18 is a vertical mud pump. The mud pump 18 is fixed to the brine storage tank 1 through a bracket 20. Preferably, the bracket 20 can be a simple movable steel pipe rack constructed with pipes to fix the vertical mud pump. Preferably, an air compressor 19 is connected to the brine storage tank 1. A temporary hose is used to connect the air compressor to the brine storage tank to stir the sludge.

[0042] Therefore, the brine storage tank sludge treatment system of the present invention utilizes the existing electrolysis device resin tower regeneration wastewater to the fresh water tank pipeline, and intermittently returns the sludge in the brine storage tank to the primary brine slag tank, so as to achieve the purpose of cleaning the brine storage tank sludge. The treatment system of the present invention does not need to be stopped, and while treating the brine storage tank sludge, it can ensure the normal operation of other processes.

[0043] Example 3

[0044] This embodiment is described by taking a certain chlor-alkali enterprise as an example.

[0045] A chlor-alkali enterprise currently has four groups of nine horizontally connected salt wells in use, producing 350m³ of brine per day. The first and second line caustic soda units have two brine storage tanks with a diameter of 50m and a volume of 10,793m³, which mainly store brine and buffer production. Since the brine storage tank was built and put into operation in 2004, it has not been dredged. However, with the extension of operation time, the silt entrained by the brine has been continuously deposited, and the effective volume of the brine tank has been continuously reduced. By 2018, the effective volume of the 2# brine tank had dropped to 33%. In order to increase the effective volume of the brine tank, the company used an excavator to clean out about 1,000m³ of sludge from the 2# brine tank in April 2018. However, the excavated salt mud was relatively sparse and difficult to stack and transport, which was prone to environmental incidents. In addition, the arm length of the excavator was limited, so only a small amount of cleaning was done on the edge of the brine tank. By June 2019, the effective volume of the 2# brine pool had dropped to 20% of the total volume, and the vacancy rate in the brine pool had dropped sharply. If a salt well malfunctioned or was shut down for overhaul, the pressure relief and drainage of the salt well would be unbalanced, posing a threat to the company's stable production at full load.

[0046] In order to promptly eliminate the threat of brine pool sludge to production, the company used the existing electrolysis device resin tower regeneration wastewater to the freshwater pool pipeline, intermittently fed the sludge in the brine storage pool back to the primary brine slag pool, and then filtered (centrifuged) through a plate and frame filter press (turbine centrifuge) and transported it out together with the salt sludge for treatment. The company successfully sent the sludge from the 2# brine pool into the slag pool. The investment was about 40,000 yuan. Subsequently, the company dredged the 1# brine storage pool and two freshwater pools. A total of 20,000 m³ of dredging was completed. Therefore, the treatment method of the present invention has a low investment cost and can achieve the purpose of effectively cleaning sludge.

[0047] In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means two or more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0049] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for treating brine storage pond sludge, characterized in that: The steps include: Disconnecting the wastewater pipeline from the first water pump (3) of the first regenerated wastewater storage tank (4) to the freshwater tank (2), and connecting the disconnected wastewater pipeline outlet to the mud pump (18) of the brine storage tank (1) via the first pipeline (10); Disconnect the wastewater pipeline from the first water pump (3) of the first regenerated wastewater storage tank (4) to the primary refined brine process, and connect the disconnected wastewater pipeline outlet to the primary brine slag pool (12) through the second pipeline (11); thereby forming a brine storage pool sludge extraction pipeline from the brine storage pool (1) through the first pipeline (10) and the second pipeline (11) to the primary brine slag pool (12); A blind plate (8) is provided on the outlet pipeline of the first water pump (3) of the first regenerated wastewater storage tank (4) so ​​that the return pipeline (7) from the first water pump (3) to the first regenerated wastewater storage tank (4) can return normally; The first drain valve (14) of the first regeneration wastewater storage tank (4) is connected to the second drain valve (15) of the second regeneration wastewater storage tank (6) through the third pipeline (13), so that when the resin tower is regenerated, the waste liquid circulated and neutralized in the first regeneration wastewater storage tank (4) enters the second regeneration wastewater storage tank (6) through the first drain valve (14), the third pipeline (13) and the second drain valve (15), and is transported to the fresh water tank (2) through the second water pump (5) of the second regeneration wastewater storage tank (6); The brine storage pond sludge treatment method is implemented based on a brine storage pond sludge treatment system, and the brine storage pond sludge treatment system comprises: a brine storage pond (1), a first regenerated wastewater storage tank (4) and a primary brine slag tank (12), wherein a slurry pump (18) is provided in the brine storage pond (1), and the outlet of the slurry pump (18) is connected to the wastewater pipeline outlet disconnected from the first water pump (3) of the first regenerated wastewater storage tank (4) to the fresh water tank (2) through a first pipeline (10); the wastewater pipeline outlet disconnected from the first water pump (3) of the first regenerated wastewater storage tank (4) to the primary refined brine process is connected to the primary brine slag tank (12) through a second pipeline (11); so as to form a brine storage pond sludge extraction pipeline from the brine storage pond (1) through the first pipeline (10) and the second pipeline (11) to the primary brine slag tank (12); A blind plate (8) is provided on the outlet pipeline of the first water pump (3) of the first regenerated wastewater storage tank (4) to form a reflux pipeline for the first regenerated wastewater storage tank (4) and the first water pump (3) to reflux to the first regenerated wastewater storage tank (4) through the reflux pipeline (7); The first drain valve (14) of the first regenerated wastewater storage tank (4) is connected to the second drain valve (15) of the second regenerated wastewater storage tank (6) via a third pipeline (13).

2. The method for treating brine storage pond sludge according to claim 1, characterized in that: The processing method further comprises the following steps: The plate-and-frame filtrate pipeline (17) of the filtrate pool (16) is connected to the outlet pipeline (21) of the second water pump (5) of the second regenerated wastewater storage tank (6) so as to be transported to the freshwater pool (2) through the outlet pipeline (21).

3. The method for treating brine storage pond sludge according to claim 1, characterized in that: The mud pump (18) is a vertical mud pump, and the mud pump (18) is fixed to the brine storage tank (1) via a bracket (20).

4. The method for treating brine storage pond sludge according to claim 1, characterized in that: The brine storage tank (1) is connected to an air compressor (19).

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