Device integrating double functions of DCP defluorination production and sewage pretreatment

Abstract

The utility model discloses a device integrating double functions of DCP (dicumyl peroxide) defluorination production and sewage pretreatment. The device is used for improving the working efficiency of DCP production and sewage treatment. The device integrating double functions of DCP defluorination production and sewage pretreatment comprises a defluorination tank, a defluorination liquid pipe, a three-way pipe, a neutralization reaction tank, a deep cone settling tank and a sewage pretreatment device, an outlet of the defluorination tank is connected with one side of a defluorination liquid pipe, the other side of the defluorination liquid pipe is connected with an inlet of a three-way pipe, a first outlet of the three-way pipe is connected with an inlet of the neutralization reaction tank through a first branch pipe, and a first valve is arranged at the joint of the first outlet and the first branch pipe; a second outlet of the three-way pipe is connected with the sewage pretreatment device through a second branch pipe; a second valve is arranged at the joint of the second outlet and the second branch pipe; and the outlet of the neutralization reaction tank is connected with the deep cone settling tank.

Description

Technical Field

[0001] The present application relates to the field of chemical production technology, and in particular to a device integrating the dual functions of DCP defluorination production and sewage pretreatment. Background Art

[0002] Dicalcium phosphate (DCP) is a white, odorless, tasteless powder or crystal that exists as triclinic crystals. The common process for producing DCP is the wet process. The wet process is to add solid raw materials to a phosphoric acid solution obtained by a wet method to generate water-soluble DCP. After vacuum concentration, cooling crystallization, and precipitation of DCP crystals, the product is dried, crushed, and sieved. In the wet process, a DCP defluorination device is provided to pre-treat the return water from the DCP production raw material slag yard to remove impurities and fluorine. In addition, a large amount of sewage will be generated after the wet process produces DCP, so another set of sewage pretreatment devices is also provided to remove phosphorus and fluorine from the sewage. The above two sets of devices have single functions and can only handle their respective tasks separately, which makes the utilization rate of the DCP defluorination device low, thereby reducing the working efficiency of chemical production. Utility Model Content

[0003] The present application provides a device integrating the dual functions of DCP defluorination production and sewage pretreatment, comprising: a defluorination tank, a defluorination liquid pipe, a tee pipe, a neutralization reaction tank, a deep cone sedimentation tank and a sewage pretreatment device;

[0004] The outlet of the defluorination tank is connected to one side of the defluorination liquid pipe, and the other side of the defluorination liquid pipe is connected to the inlet of the tee pipe. The first outlet of the tee pipe is connected to the inlet of the neutralization reaction tank through a first branch pipe, and a first valve is provided at the connection between the first outlet and the first branch pipe; the second outlet of the tee pipe is connected to the sewage pretreatment device through a second branch pipe, and a second valve is provided at the connection between the second outlet and the second branch pipe; the outlet of the neutralization reaction tank is connected to the deep cone sedimentation tank.

[0005] Optionally, the sewage pretreatment device includes a water distribution tank, the second outlet of the tee pipe is connected to the inlet of the water distribution tank, and the water distribution tank is used to pretreat the sewage.

[0006] Optionally, the sewage pretreatment device further includes a sludge collection tank, and the sewage outlet of the defluorination tank, the sewage outlet of the neutralization reaction tank and the sewage outlet of the deep cone sedimentation tank are respectively connected to the sludge collection tank through sewage pipes.

[0007] Optionally, a sludge pump is provided at the connection between the sewage pipe and the sludge collection tank.

[0008] Optionally, the outlet of the mud discharge pump is provided with a check valve and a rubber-lined straight-through valve.

[0009] Optionally, the sewage pipe is also connected to an industrial water pipe, and the industrial water pipe is used to introduce clean water to flush the sewage pipe.

[0010] Optionally, the device integrating the dual functions of DCP defluorination production and sewage pretreatment also includes a lime emulsion configuration and storage tank, a slag yard return water storage tank and a flocculant preparation tank, the outlet of the lime emulsion configuration and storage tank is connected to the inlet of the defluorination tank, the outlet of the flocculant preparation tank is connected to the inlet of the deep cone sedimentation tank, and the liquid outlet of the deep cone sedimentation tank is connected to the inlet of the slag yard return water storage tank.

[0011] Optionally, the first branch pipe and the second branch pipe are HDPE steel skeleton composite pipes, and the nominal diameter of the HDPE steel skeleton composite pipe is 250 mm.

[0012] Optionally, the first valve and the second valve are rubber-lined straight-through valves.

[0013] Optionally, the device integrating the dual functions of DCP defluorination production and sewage pretreatment is communicatively connected to a DCP defluorination production DCS system and a sewage pretreatment DCS system.

[0014] It can be seen from the above technical solutions that this application has the following advantages:

[0015] The present application provides a device that integrates the dual functions of DCP defluorination production and sewage pretreatment, including: a defluorination tank, a defluorination liquid pipe, a tee, a neutralization reaction tank, a deep cone sedimentation tank and a sewage pretreatment device; the outlet of the defluorination tank is connected to one side of the defluorination liquid pipe, and the other side of the defluorination liquid pipe is connected to the inlet of the tee, the first outlet of the tee is connected to the inlet of the neutralization reaction tank through a first branch pipe, and a first valve is provided at the connection between the first outlet and the first branch pipe; the second outlet of the tee is connected to the sewage pretreatment device through a second branch pipe, and a second valve is provided at the connection between the second outlet and the second branch pipe; the outlet of the neutralization reaction tank is connected to the deep cone sedimentation tank. Thus, when DCP production is carried out, the first valve is opened and the second valve is closed, so that the defluorination liquid in the defluorination tank enters the neutralization reaction tank through the tee, the first valve and the first branch pipe to continue the DCP production process; when sewage pretreatment is carried out, the sewage enters the sewage pretreatment device through the tee, the second valve and the second branch pipe after defluorination in the defluorination tank. In summary, the device of the present application that integrates the dual functions of DCP defluorination production and sewage pretreatment can not only meet the defluorination needs in the DCP production process, but also realize the defluorination function of sewage pretreatment, thereby improving the utilization rate of the DCP defluorination device and thereby improving the work efficiency of chemical production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic structural diagram of an embodiment of a device that integrates the dual functions of DCP defluorination production and sewage pretreatment provided in this application. DETAILED DESCRIPTION

[0017] In order to solve the above technical problems, the present application provides a device that integrates the dual functions of DCP defluorination production and sewage pretreatment, which is used to improve the efficiency of DCP production and sewage treatment operations.

[0018] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only used to illustrate the relative position relationship between the various components or components, and do not particularly limit the specific installation orientation of the various components or components.

[0019] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0020] It should also be noted that the terms "first", "second", etc. in the specification and drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order, sequence or importance.

[0021] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0022] In addition, the structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0023] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in this application. Obviously, the embodiments described are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0024] See also Figure 1 The present application provides a device that integrates the dual functions of DCP defluorination production and sewage pretreatment, the device comprising:

[0025] Defluorination tank 01, defluorination liquid pipe 02, tee pipe 03, neutralization reaction tank 04, deep cone sedimentation tank 05 and sewage pretreatment device 06;

[0026] The outlet of the defluorination tank 01 is connected to one side of the defluorination liquid pipe 02, and the other side of the defluorination liquid pipe 02 is connected to the inlet of the tee pipe 03. The first outlet of the tee pipe 03 is connected to the inlet of the neutralization reaction tank 04 through the first branch pipe, and a first valve is provided at the connection between the first outlet and the first branch pipe; the second outlet of the tee pipe 03 is connected to the sewage pretreatment device 06 through the second branch pipe, and a second valve is provided at the connection between the second outlet and the second branch pipe; the outlet of the neutralization reaction tank 04 is connected to the deep cone sedimentation tank 05.

[0027] First, the various components in this embodiment are introduced below:

[0028] Defluorination Tank 01: Used to defluorinate the raw materials or wastewater used in DCP production. Defluorination agents, such as lime milk, are added to the defluorination tank for defluorination. The deoxygenation tank is equipped with a pH meter and agitator to assist in the defluorination reaction.

[0029] Defluorination Liquid Pipe 02: Used to transport the defluorinated slurry to other components for subsequent work. Defluorination Liquid Pipe 02 is made of corrosion-resistant, high-strength metal material to ensure that the device has good corrosion resistance during the defluorination process.

[0030] Tee 03: A pipe used to divert or control liquid flow. The tee 03 used in this application has one inlet and two outlets. The inlet of tee 03 is connected to the defluorination liquid pipe 02, controlling the flow of the defluorination liquid. The first outlet of tee 03 is oriented toward DCP production, while the second outlet is oriented toward wastewater pretreatment, thus achieving the dual functions of DCP defluorination production and wastewater pretreatment in this application's device.

[0031] Neutralization Reaction Tank 04: This is the core component of DCP production, producing DCP through a neutralization reaction. The first outlet of the tee pipe 03 is connected to the inlet of the neutralization reaction tank 04 via a first branch pipe. A first valve is installed at the junction of the first outlet and the first branch pipe. When DCP production is required, the first valve is opened and the second valve is closed. The defluorinated DCP slurry is transported through the tee pipe 03 and the first branch pipe to the neutralization reaction tank 04. A pH meter and stirring equipment are installed in the neutralization reaction tank 04 to assist in the completion of the neutralization reaction.

[0032] Deep Cone Sedimentation Tank 05: Used for solid-liquid separation, it performs both thickening and clarification functions. When the primary purpose of sedimentation separation is to obtain a clarified liquid, Deep Cone Sedimentation Tank 05 serves as a clarifier. If the primary purpose of sedimentation separation is to obtain a precipitate containing solid particles, Deep Cone Sedimentation Tank 05 serves as a thickener. The outlet of Neutralization Tank 04 is connected to the inlet of Deep Cone Sedimentation Tank 05, and the neutralization reaction product enters Deep Cone Sedimentation Tank 05. Therefore, for the apparatus of this application, obtaining DCP requires a precipitate after settling.

[0033] Sewage Pretreatment Unit 06: Used to pretreat wastewater, including high-phosphorus water. The second outlet of T-tube 03 is connected to Sewage Pretreatment Unit 06 via a second branch pipe. A second valve is installed at the junction of the second outlet and the second branch pipe. When defluoridation is being performed on the wastewater in defluoridation tank 01, the first valve is closed and the second valve is opened, thereby controlling the flow of the defluoridated wastewater into Sewage Pretreatment Unit 06. After defluoridation in defluoridation tank 01, the wastewater undergoes phosphorus removal and other operations in Sewage Pretreatment Unit 06. Once the wastewater meets the new standards, it is transported to subsequent treatment units for more demanding treatment.

[0034] In this embodiment, when DCP production is carried out, the first valve is opened and the second valve is closed, so that the defluorination liquid in the defluorination tank 01 enters the neutralization reaction tank 04 through the tee pipe 03, the first valve and the first branch pipe to continue the DCP production process; when sewage pretreatment is carried out, the sewage is defluorinated in the defluorination tank 01 and then enters the sewage pretreatment device 06 through the tee pipe 03, the second valve and the second branch pipe. Therefore, the device of the present application that integrates the dual functions of DCP defluorination production and sewage pretreatment can not only meet the defluorination needs in the DCP production process, but also realize the defluorination function of sewage pretreatment, thereby improving the utilization rate of the DCP defluorination device and thereby improving the work efficiency of chemical production.

[0035] In an optional embodiment, the sewage pretreatment device 06 includes a water distribution tank 061 , the second outlet of the tee pipe 03 is connected to the inlet of the water distribution tank 061 , and the water distribution tank 061 is used to pretreat the sewage.

[0036] In this optional embodiment, the sewage pretreatment device 06 is equipped with a water distribution tank 061. The sewage treatment in the water distribution tank 061 includes phosphorus removal, ammonia nitrogen removal, etc. The second outlet of the tee pipe 03 is connected to the inlet of the water distribution tank 061 through the second branch pipe.

[0037] In an optional embodiment, the sewage pretreatment device 06 further includes a sludge collection tank 062 , and the sewage outlets of the defluorination tank 01 , the neutralization reaction tank 04 and the deep cone sedimentation tank 05 are respectively connected to the sludge collection tank 062 through sewage pipes.

[0038] In this optional embodiment, during the DCP production and sewage treatment process, sludge is easily accumulated in the defluorination tank 01, the neutralization reaction tank 04 and the deep cone sedimentation tank 05. Therefore, it is necessary to set up a sewage pipe and a sludge collection tank 062 to discharge this sludge, and then connect the sewage outlets of the defluorination tank 01, the neutralization reaction tank 04 and the deep cone sedimentation tank 05 to the same sewage pipe, and then connect the sewage pipe to the sludge collection tank 062. After the sludge is transferred to the sludge collection tank 062 through the sewage pipe, the sludge is treated in the sludge collection tank 062 and discharged when the sludge meets the sewage discharge standards.

[0039] In an optional embodiment, a sludge pump is provided at the connection between the sewage pipe and the sludge collection tank 062 .

[0040] In this optional embodiment, the sludge pump pumps the sludge in the sewage pipe to the sludge collection tank 062 through pressure relationship, so as to prevent excessive accumulation of sludge in the sewage pipe, causing blockage and making it difficult to discharge.

[0041] In an optional embodiment, the outlet of the mud discharge pump is provided with a check valve and a rubber-lined straight-through valve.

[0042] In this optional embodiment, the check valve prevents the sludge from flowing back, and the rubber-lined straight-through valve adjusts the flow, pressure and direction of the sludge by controlling the opening and closing of the valve, thereby achieving control and regulation of the sewage pipe.

[0043] In an optional embodiment, the sewage pipe is also connected to an industrial water pipe, which is used to introduce clean water to flush the sewage pipe.

[0044] In this optional embodiment, even if a sludge pump is provided, sludge will inevitably remain in the sewage pipe, so an industrial water pipe is connected to the vicinity of the sewage pipe inlet, and clean water is introduced to flush the sludge remaining on the sewage pipe.

[0045] In an optional embodiment, the device integrating the dual functions of DCP defluorination production and sewage pretreatment also includes a lime emulsion configuration and storage tank 07, a slag yard return water storage tank 08 and a flocculant preparation tank 09. The outlet of the lime emulsion configuration and storage tank 07 is connected to the inlet of the defluorination tank 01, the outlet of the flocculant preparation tank 09 is connected to the inlet of the deep cone sedimentation tank 05, and the liquid outlet of the deep cone sedimentation tank 05 is connected to the inlet of the slag yard return water storage tank 08.

[0046] In this optional embodiment, the DCP production process also requires a lime emulsion preparation and storage tank 07, a slag field return water storage tank 08, and a flocculant preparation tank 09. Lime emulsion preparation and storage tank 07 is used to produce lime emulsion, which can serve as a defluorinating agent. Therefore, the product outlet of lime emulsion preparation and storage tank 07 is connected to the inlet of defluorinating tank 01. Lime emulsion can also be used as a raw material for the neutralization reaction in DCP production. Specifically, the product outlet of lime emulsion preparation and storage tank 07 is connected to the inlet of neutralization reaction tank 04. Flocculant preparation tank 09 is used to produce flocculants, which improve solid-liquid separation efficiency. Therefore, the outlet of flocculant preparation tank 09 is connected to the inlet of deep cone settling tank 05, accelerating the solid-liquid separation process there. After solid-liquid separation, the supernatant from deep cone settling tank 05 is transported through the liquid outlet to slag field return water storage tank 08 for subsequent processing and utilization.

[0047] In an optional embodiment, the first branch pipe and the second branch pipe are HDPE steel skeleton composite pipes, and the nominal diameter of the HDPE steel skeleton composite pipe is 250 mm.

[0048] In this optional embodiment, the HDPE steel skeleton composite pipe has excellent flexibility, overcomes the shortcomings of steel pipes and plastic pipes while retaining the advantages of steel pipes and plastic pipes, has high strength and corrosion resistance, and is suitable for long-distance liquid or gas transportation systems.

[0049] In an optional embodiment, the first valve and the second valve are rubber-lined straight-through valves.

[0050] In this optional embodiment, similarly, the first valve and the second valve use rubber-lined straight-through valves to facilitate control of valve opening and closing and guide the flow direction of the fluid.

[0051] In an optional embodiment, the device integrating the dual functions of DCP defluorination production and sewage pretreatment is communicatively connected to the DCP defluorination production DCS system and the sewage pretreatment DCS system.

[0052] In this optional embodiment, the DCS system, i.e., a distributed control system, is a control system with decentralized control functions and centralized display operations. The device integrating the dual functions of DCP defluorination production and sewage pretreatment is communicatively connected to the DCP defluorination production DCS system and the sewage pretreatment DCS system for remote and centralized control of the DCP defluorination production and sewage pretreatment work.

[0053] It should be noted that the above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device integrating the dual functions of DCP defluorination production and sewage pretreatment, characterized in that: include: Defluorination tank, defluorination liquid pipe, tee pipe, neutralization reaction tank, deep cone sedimentation tank and sewage pretreatment device; The outlet of the defluorination tank is connected to one side of the defluorination liquid pipe, and the other side of the defluorination liquid pipe is connected to the inlet of the tee pipe. The first outlet of the tee pipe is connected to the inlet of the neutralization reaction tank through a first branch pipe, and a first valve is provided at the connection between the first outlet and the first branch pipe; the second outlet of the tee pipe is connected to the sewage pretreatment device through a second branch pipe, and a second valve is provided at the connection between the second outlet and the second branch pipe; the outlet of the neutralization reaction tank is connected to the deep cone sedimentation tank.

2. The device according to claim 1, which integrates the dual functions of DCP defluorination production and sewage pretreatment, is characterized in that: The sewage pretreatment device includes a water distribution tank, the second outlet of the three-way pipe is connected to the inlet of the water distribution tank, and the water distribution tank is used to pretreat sewage.

3. The device according to claim 1, which integrates the dual functions of DCP defluorination production and sewage pretreatment, is characterized in that: The sewage pretreatment device further comprises a sludge collection tank, and the sewage outlets of the defluorination tank, the neutralization reaction tank and the deep cone sedimentation tank are respectively connected to the sludge collection tank through sewage pipes.

4. The device according to claim 3, which integrates the dual functions of DCP defluorination production and sewage pretreatment, is characterized in that: A sludge pump is provided at the connection between the sewage pipe and the sludge collection tank.

5. The device according to claim 4, which integrates the dual functions of DCP defluorination production and sewage pretreatment, is characterized in that: The outlet of the mud discharge pump is provided with a check valve and a rubber-lined straight-through valve.

6. The device according to claim 3, which integrates the dual functions of DCP defluorination production and sewage pretreatment, is characterized in that: The sewage pipe is also connected to an industrial water pipe, and the industrial water pipe is used to introduce clean water to flush the sewage pipe.

7. The device according to claim 1, which integrates the dual functions of DCP defluorination production and sewage pretreatment, is characterized in that: The device integrating the dual functions of DCP defluorination production and sewage pretreatment also includes a lime emulsion configuration and storage tank, a slag yard return water storage tank and a flocculant preparation tank. The outlet of the lime emulsion configuration and storage tank is connected to the inlet of the defluorination tank, the outlet of the flocculant preparation tank is connected to the inlet of the deep cone sedimentation tank, and the liquid outlet of the deep cone sedimentation tank is connected to the inlet of the slag yard return water storage tank.

8. The device according to any one of claims 1 to 7, which integrates the dual functions of DCP defluorination production and sewage pretreatment, is characterized in that: The first branch pipe and the second branch pipe are HDPE steel skeleton composite pipes, and the nominal diameter of the HDPE steel skeleton composite pipe is 250 mm.

9. The device for integrating DCP defluorination production and sewage pretreatment according to any one of claims 1 to 7, characterized in that: The first valve and the second valve are rubber-lined straight-through valves.

10. The device integrating the dual functions of DCP defluorination production and sewage pretreatment according to any one of claims 1 to 7, characterized in that: The device integrating the dual functions of DCP defluorination production and sewage pretreatment is communicatively connected with the DCP defluorination production DCS system and the sewage pretreatment DCS system.

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