A system for recycling fluorine removal agents in high-density pool sludge
By adding recovery pipes and valves between the southern and northern fluoride removal tanks of high-density sedimentation tanks, the reflow and reuse of sludge is achieved, and the problems of tight drying sites and increased energy consumption caused by high sludge moisture content are solved, and the reuse of fluoride removal agents and the reduction of sludge production are achieved.
Patent Information
- Application Number
- CN202421423374.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-20
AI Technical Summary
In factories where coal is used as raw materials for deep processing and preparation of methanol products, the sludge content in the high-density sedimentation tank is high, resulting in long-term drying before incineration, resulting in tight drying sites in the coal yard and increased boiler energy consumption.
A system for reuse of fluoride removal agents in high-density pool sludge is designed. By adding a recovery pipe and a valve between the southern and northern fluoride removal pools, the opening and closing of the valves are controlled using the original process conditions, and the reflow and reuse of biochemical sludge and physical and chemical sludge is realized.
Without increasing equipment and energy consumption, the reuse of fluorine-depleting agents is achieved, reducing the amount of sludge produced, stabilizing the operating conditions of the high-density fluorine-depleting pool, and solving the problem of fine fragmentation of alum flowers in Beichi.
Smart Images
Figure CN222700174U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of drug recovery, in particular to a system for recycling fluorine removal drugs in high-density pool sludge. Background Art
[0002] In factories that use coal as raw material for deep processing to produce methanol products, a defluorination device is installed to ensure that the fluoride ion in the discharged wastewater meets the standard. Generally, the designed water treatment volume is 300m 3 / h high-density sedimentation tanks (i.e., the South and North Defluorination Tanks). The South Tank treats clean wastewater with a fluoride content of 2-4 mg / L. When the fluoride content is <3 mg / L, PAC is added, and when the fluoride content is >3 mg / L, a small amount of defluoridation agent is added. The effluent from the North Tank sewage treatment plant has a fluoride content of 8-14 mg / L, and a large amount of defluoridation agent needs to be added, resulting in a large amount of biochemical sludge. Because the fluoride content in the North Tank influent is high, the amount of defluoridation agent added is large, and the amount of precipitated sludge produced is large, which needs to be incinerated. However, since the sludge water content is still high after being treated by the sludge dewatering machine, the sludge water content must be reduced by open air drying before mixing and burning. However, the sludge water content is still high after drying (>85%), resulting in tight drying space in the coal yard and increased boiler energy consumption. Utility Model Content
[0003] The utility model aims to provide a system for recycling defluorination agents in high-density pool sludge, thereby solving the above-mentioned problems existing in the prior art.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0005] A system for reusing defluorination agents in high-density pool sludge, comprising a north defluorination pool, a south defluorination pool, a first recovery pipe, a second recovery pipe, a first valve, a second valve, a third valve and a fourth valve; the north defluorination pool sludge return pipe of the north defluorination pool and the south defluorination pool sludge return pipe of the south defluorination pool are respectively provided with a first valve and a fourth valve; the first recovery pipe is provided with a second valve, one end of the first recovery pipe is connected to the north defluorination pool sludge return pipe, the connection point is located upstream of the first valve, the other end of the first recovery pipe is connected to the south defluorination pool sludge return pipe, the connection point is located downstream of the fourth valve; the second recovery pipe is provided with a third valve, one end of the second recovery pipe is connected to the south defluorination pool sludge return pipe, the connection point is located upstream of the fourth valve, the other end of the second recovery pipe is connected to the north defluorination pool sludge return pipe, the connection point is located downstream of the first valve.
[0006] Preferably, the fluorine removal north pool includes a north high-efficiency sedimentation tank, a fluorine removal north pool bottom sludge discharge pipe, a north sludge return pump A, a north sludge discharge pump, a fluorine removal north pool external sludge discharge pipe, and a fluorine removal north pool sludge return pipe;
[0007] The north high-efficiency sedimentation tank is connected to the mixing tank, and the lower end of the north high-efficiency sedimentation tank is connected to two fluoride removal north tank bottom sludge discharge pipes, and the two fluoride removal north tank bottom sludge discharge pipes are respectively connected to the input end of the north sludge return pump A and the input end of the north sludge discharge pump, and the output end of the north sludge return pump A and the output end of the north sludge discharge pump are respectively connected to the sludge thickening tank and the mixing tank through the fluoride removal north tank external sludge discharge pipe and the fluoride removal north tank sludge return pipe.
[0008] Preferably, the fluorine removal north tank also includes a north sludge return pump B; a fluorine removal north tank intermediate pipe is connected between the two fluorine removal north tank bottom sludge discharge pipes, the fluorine removal north tank intermediate pipe is connected to the input end of the north sludge return pump B, and the output end of the north sludge return pump B is respectively connected to the fluorine removal north tank external sludge discharge pipe and the fluorine removal north tank sludge return pipe via the north sludge tank cut-off valve and the north sedimentation tank switching valve.
[0009] Preferably, the fluorine removal north pool includes a south high-efficiency sedimentation tank, a fluorine removal south pool bottom sludge pipe, a south sludge return pump A, a south sludge discharge pump, a fluorine removal south pool external sludge pipe, and a fluorine removal south pool sludge return pipe;
[0010] The southern high-efficiency sedimentation tank is connected to the mixing tank, and the lower end of the southern high-efficiency sedimentation tank is connected to two fluoride-removing southern tank bottom sludge discharge pipes, and the two fluoride-removing southern tank bottom sludge discharge pipes are respectively connected to the input end of the southern sludge return pump A and the input end of the southern sludge discharge pump, and the output end of the southern sludge return pump A and the output end of the south sludge discharge pump are respectively connected to the sludge thickening tank and the mixing tank through the fluoride-removing southern tank external sludge discharge pipe and the fluoride-removing southern tank sludge return pipe.
[0011] Preferably, the fluorine removal south pool also includes a south sludge return pump B; a fluorine removal south pool intermediate pipe is connected between the two fluorine removal south pool bottom sludge discharge pipes, the fluorine removal south pool intermediate pipe is connected to the input end of the south sludge return pump B, and the output end of the south sludge return pump B is respectively connected to the fluorine removal south pool external sludge discharge pipe and the fluorine removal south pool sludge return pipe via the south sludge pool shut-off valve and the south sedimentation tank switching valve.
[0012] Preferably, the sludge discharge pipe outside the fluorine removal north pool and the sludge discharge pipe outside the fluorine removal south pool are connected to the sludge thickening tank after merging.
[0013] Preferably, the north sludge return pump A, the north sludge discharge pump, the north sludge return pump B, the south sludge return pump A, the south sludge discharge pump and the south sludge return pump B are all connected to the mechanical seal water pipe.
[0014] The beneficial effects of the utility model are as follows: by adding a recovery pipe and a valve between the south defluorination pool and the north defluorination pool, without increasing equipment and energy consumption, the original process conditions are utilized, and only by controlling the opening and closing and the opening of the corresponding valves, the return and reuse of biochemical sludge and physicochemical sludge are achieved, thereby saving defluorination agents, reducing sludge generation and stabilizing the operating conditions of the high-density defluorination pool, and solving the problem of fine alum flowers in the north pool. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural diagram of the reuse system in the embodiment of the utility model. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.
[0017] like Figure 1 As shown, in this embodiment, a system for recycling defluorination agents in high-density pool sludge is provided, including a defluorination north pool, a defluorination south pool, a first recovery pipe, a second recovery pipe, a first valve, a second valve, a third valve and a fourth valve; the defluorination north pool sludge return pipe of the defluorination north pool and the defluorination south pool sludge return pipe of the defluorination south pool are respectively provided with a first valve and a fourth valve; the first recovery pipe is provided with a second valve, one end of the first recovery pipe is connected to the defluorination north pool sludge return pipe, and the connection point is located upstream of the first valve, and the other end of the first recovery pipe is connected to the defluorination south pool sludge return pipe, and the connection point is located downstream of the fourth valve; the second recovery pipe is provided with a third valve, one end of the second recovery pipe is connected to the defluorination south pool sludge return pipe, and the connection point is located upstream of the fourth valve, and the other end of the second recovery pipe is connected to the defluorination north pool sludge return pipe, and the connection point is located downstream of the first valve.
[0018] In this embodiment, the defluorination device includes a north defluorination pool and a south defluorination pool:
[0019] (1) The defluorination northern pool includes a northern high-efficiency sedimentation tank, a defluorination northern pool bottom sludge discharge pipe, a northern sludge return pump A, a northern sludge discharge pump, a defluorination northern pool external sludge discharge pipe, and a defluorination northern pool sludge return pipe;
[0020] The north high-efficiency sedimentation tank is connected to the mixing tank, and the lower end of the north high-efficiency sedimentation tank is connected to two fluoride removal north tank bottom sludge discharge pipes, and the two fluoride removal north tank bottom sludge discharge pipes are respectively connected to the input end of the north sludge return pump A and the input end of the north sludge discharge pump, and the output end of the north sludge return pump A and the output end of the north sludge discharge pump are respectively connected to the sludge thickening tank and the mixing tank through the fluoride removal north tank external sludge discharge pipe and the fluoride removal north tank sludge return pipe.
[0021] The fluorine removal north tank also includes a north sludge return pump B; a fluorine removal north tank intermediate pipe is connected between the two fluorine removal north tank bottom sludge discharge pipes, the fluorine removal north tank intermediate pipe is connected to the input end of the north sludge return pump B, and the output end of the north sludge return pump B is respectively connected to the fluorine removal north tank external sludge discharge pipe and the fluorine removal north tank sludge return pipe through the north sludge tank cut-off valve and the north sedimentation tank switching valve.
[0022] (2) The fluoride removal north pool includes a south high-efficiency sedimentation tank, a fluoride removal south pool bottom sludge discharge pipe, a south sludge return pump A, a south sludge discharge pump, a fluoride removal south pool external sludge discharge pipe, and a fluoride removal south pool sludge return pipe;
[0023] The southern high-efficiency sedimentation tank is connected to the mixing tank, and the lower end of the southern high-efficiency sedimentation tank is connected to two fluoride-removing southern tank bottom sludge discharge pipes, and the two fluoride-removing southern tank bottom sludge discharge pipes are respectively connected to the input end of the southern sludge return pump A and the input end of the southern sludge discharge pump, and the output end of the southern sludge return pump A and the output end of the south sludge discharge pump are respectively connected to the sludge thickening tank and the mixing tank through the fluoride-removing southern tank external sludge discharge pipe and the fluoride-removing southern tank sludge return pipe.
[0024] The fluorine removal south pool also includes a south sludge return pump B; a fluorine removal south pool intermediate pipe is connected between the two fluorine removal south pool bottom sludge discharge pipes, the fluorine removal south pool intermediate pipe is connected to the input end of the south sludge return pump B, and the output end of the south sludge return pump B is respectively connected to the fluorine removal south pool external sludge discharge pipe and the fluorine removal south pool sludge return pipe via the south sludge pool cut-off valve and the south sedimentation tank switching valve.
[0025] In this embodiment, the sludge pipe discharged from the north fluorine removal tank and the sludge pipe discharged from the south fluorine removal tank are connected to the sludge thickening tank after merging. The north sludge return pump A, the north sludge discharge pump, the north sludge return pump B, the south sludge return pump A, the south sludge discharge pump and the south sludge return pump B are all connected to the mechanical seal water pipe.
[0026] In this embodiment, a mixing mixer and a flocculating mixer are provided in the mixing tank. A thickening scraper is provided in the high-efficiency sedimentation tank. Corresponding switch valves are provided on the corresponding pipelines, as shown in FIG. Figure 1 For example, a mud inlet valve is provided on the mud discharge pipe at the bottom of the pool; a mechanical seal water valve is provided on the connecting pipe between the mechanical seal water pipe and the corresponding pump; an inlet switching valve is provided on the intermediate pipe of the north defluorination pool and the intermediate pipe of the south defluorination pool; and a sludge pump outlet valve is provided on the connecting pipe between the pump and the concentration pool or sedimentation pool.
[0027] In this embodiment, the working process of the fluorine removal device is that the precipitated sludge in the fluorine removal south (north) sedimentation tank is discharged through the sludge discharge pipeline at the bottom of the south (north) tank, part of the sludge is pressurized and transported to the sludge thickening tank by the south (north) sludge discharge pump, and the other part of the sludge is pressurized and transported to the mixing tank of the fluorine removal south (north) high-efficiency sedimentation tank by the south (north) sludge return pump for reuse.
[0028] In this embodiment, on the basis of the defluorination device, a first recovery pipe, a second recovery pipe, a first valve, a second valve, a third valve and a fourth valve are added. During operation, the third valve is opened and the fourth valve is closed, and the physical and chemical sludge in the South Pool is sent to the North Pool, which is conducive to flocculation and sedimentation in the North Pool and solves the problem of alum flocculants floating and crushing. The second valve is opened and the first valve is closed, and the biochemical sludge in the North Pool is sent to the South Pool, and the defluorination agent remaining in the sludge can be reused, reducing the consumption of defluorination agent in the South Pool. The amount of reflux sludge between the South and North Pools can also be adjusted by adjusting the valve opening according to the actual working conditions, which is conducive to the stability of the working conditions of the South and North Pools.
[0029] In this embodiment, the physical and chemical sludge in the North Pool is sent to the South Pool, and the residual defluoridation agent in the North Pool sludge can be reused, reducing the agent consumption in the South Pool and saving about 5% of the defluoridation agent consumption. The physical and chemical sludge in the South Pool is sent to the North Pool, which is conducive to the flocculation and sedimentation of the North Pool, solving the problem of alum flocs floating and fragmentation caused by the over-clarification of the sewage effluent in the North Pool, reducing the fluoride ion content of the effluent, stabilizing the effluent water quality, and avoiding the COD or ammonia nitrogen index exceeding the standard due to the automatic detector at the environmental monitoring point of the company's external outlet due to the fine alum flocs, causing environmental problems. After the above-mentioned transformation is completed and put into operation, the amount of defluoridation sludge produced can be reduced by about 10%, reducing the operating consumption of the defluoridation sludge pump and the plate and frame filter press, reducing the workload of employees, alleviating the tension in the coal yard drying area, and reducing the consumption of the boiler due to the increased sludge mixing.
[0030] By adopting the above technical solution disclosed in the utility model, the following beneficial effects are obtained:
[0031] The utility model provides a system for recycling fluorine removal agents in sludge water discharged from a high-density pool. By adding a recovery pipe and a valve between a south defluorination pool and a north defluorination pool, the original process conditions are utilized without increasing equipment and energy consumption. Only by controlling the opening and closing and the opening of corresponding valves, the recycling of biochemical sludge and physicochemical sludge is realized, thereby achieving the effects of saving fluorine removal agents, reducing sludge generation, and stabilizing the operating conditions of the high-density defluorination pool, and solving the problem of fine alum flowers in the north pool.
[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.
Claims
1. A system for recycling defluorination agents in high-density pool sludge, characterized by: It includes a north defluorination pool, a south defluorination pool, a first recovery pipe, a second recovery pipe, a first valve, a second valve, a third valve and a fourth valve; the first valve and the fourth valve are respectively provided on the sludge return pipe of the north defluorination pool of the north defluorination pool and the sludge return pipe of the south defluorination pool of the south defluorination pool; the second valve is provided on the first recovery pipe, one end of the first recovery pipe is connected to the sludge return pipe of the north defluorination pool, and the connection point is located upstream of the first valve, and the other end of the first recovery pipe is connected to the sludge return pipe of the south defluorination pool, and the connection point is located downstream of the fourth valve; the third valve is provided on the second recovery pipe, one end of the second recovery pipe is connected to the sludge return pipe of the south defluorination pool, and the connection point is located upstream of the fourth valve, and the other end of the second recovery pipe is connected to the sludge return pipe of the north defluorination pool, and the connection point is located downstream of the first valve.
2. The system for recycling fluorine removal agents in high-density pool sludge according to claim 1, characterized in that: The defluorination north pool comprises a north high-efficiency sedimentation tank, a defluorination north pool bottom sludge discharge pipe, a north sludge return pump A, a north sludge discharge pump, a defluorination north pool external sludge discharge pipe, and a defluorination north pool sludge return pipe; The north high-efficiency sedimentation tank is connected to the mixing tank, and the lower end of the north high-efficiency sedimentation tank is connected to two fluoride removal north tank bottom sludge discharge pipes, and the two fluoride removal north tank bottom sludge discharge pipes are respectively connected to the input end of the north sludge return pump A and the input end of the north sludge discharge pump, and the output end of the north sludge return pump A and the output end of the north sludge discharge pump are respectively connected to the sludge thickening tank and the mixing tank through the fluoride removal north tank external sludge discharge pipe and the fluoride removal north tank sludge return pipe.
3. The system for recycling defluorination agent in high-density pool sludge according to claim 2, characterized in that: The fluorine removal north tank also includes a north sludge return pump B; a fluorine removal north tank intermediate pipe is connected between the two fluorine removal north tank bottom sludge discharge pipes, the fluorine removal north tank intermediate pipe is connected to the input end of the north sludge return pump B, and the output end of the north sludge return pump B is respectively connected to the fluorine removal north tank external sludge discharge pipe and the fluorine removal north tank sludge return pipe through the north sludge tank cut-off valve and the north sedimentation tank switching valve.
4. The system for recycling defluorination agent in high-density pool sludge according to claim 3, characterized in that: The defluorination north pool includes a south high-efficiency sedimentation pool, a sludge discharge pipe at the bottom of the defluorination south pool, a south sludge return pump A, a south sludge discharge pump, a sludge discharge pipe outside the defluorination south pool, and a sludge return pipe of the defluorination south pool; The southern high-efficiency sedimentation tank is connected to the mixing tank, and the lower end of the southern high-efficiency sedimentation tank is connected to two fluoride-removing southern tank bottom sludge discharge pipes, and the two fluoride-removing southern tank bottom sludge discharge pipes are respectively connected to the input end of the southern sludge return pump A and the input end of the southern sludge discharge pump, and the output end of the southern sludge return pump A and the output end of the south sludge discharge pump are respectively connected to the sludge thickening tank and the mixing tank through the fluoride-removing southern tank external sludge discharge pipe and the fluoride-removing southern tank sludge return pipe.
5. The system for recycling defluorination agent in high-density pool sludge according to claim 4, characterized in that: The fluorine removal south pool also includes a south sludge return pump B; a fluorine removal south pool intermediate pipe is connected between the two fluorine removal south pool bottom sludge discharge pipes, the fluorine removal south pool intermediate pipe is connected to the input end of the south sludge return pump B, and the output end of the south sludge return pump B is respectively connected to the fluorine removal south pool external sludge discharge pipe and the fluorine removal south pool sludge return pipe via the south sludge pool cut-off valve and the south sedimentation tank switching valve.
6. The system for recycling defluorination agent in high-density pool sludge according to claim 5, characterized in that: The sludge discharge pipe outside the fluorine removal north pool and the sludge discharge pipe outside the fluorine removal south pool are connected to the sludge thickening pool after converging.
7. The system for recycling defluorination agents in high-density pool sludge according to claim 5, characterized in that: The north sludge return pump A, the north sludge discharge pump, the north sludge return pump B, the south sludge return pump A, the south sludge discharge pump and the south sludge return pump B are all connected to the mechanical seal water pipe.