Coal chemical wastewater ceramic flat sheet membrane water reuse system
The ceramic flat-sheet membrane wastewater reuse system solves the problems of complex and high cost in coal chemical wastewater treatment, achieving efficient and low-cost wastewater treatment with stable effluent quality, strong adaptability, minimal membrane fouling, and long service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HUAYUAN ENVIRONMENTAL TECH CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-06-23
AI Technical Summary
Existing methods for treating coal chemical wastewater are complex, require large areas of land, are complicated to operate, and have high operating costs. They also suffer from serious membrane fouling and expensive replacement of consumables.
The ceramic flat-plate membrane wastewater reuse system includes a ceramic membrane tank, a product water tank, a product water pump, a backwash pump, a chemical washing system, and an electrical control system. It utilizes the pore channels formed by nano-sized ceramic particles for filtration and chemical washing, and combines automatic control to achieve fully automatic operation.
It achieves high-throughput, low-cost wastewater treatment with minimal membrane fouling, long lifespan, stable effluent quality, strong adaptability, and low operating costs.
Smart Images
Figure CN224394656U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a ceramic flat sheet membrane system for recycling wastewater from coal chemical industry. Background Technology
[0002] my country's energy structure, characterized by abundant coal, scarce oil, and limited natural gas, has spurred the rapid development of the coal chemical industry, particularly emerging coal chemical industries. This rapid development generates substantial amounts of industrial wastewater, which is complex in composition and typically contains high levels of toxic and harmful substances such as phenols, cyanides, and benzene. It also exhibits extremely high levels of CODcr, color, and ammonia nitrogen, making it exceptionally difficult to treat. Wastewater treatment remains a significant challenge. Currently, biological methods are the primary approach for treating coal chemical wastewater in China. The treatment process can be summarized into three main parts: targeted physicochemical pretreatment → biological treatment → subsequent (or advanced) treatment. Biological treatment primarily includes processes such as A / O, A2O, SBR, and UASB. Following biological treatment, processes such as coagulation sedimentation and high-efficiency filters are often employed.
[0003] However, the treated wastewater often fails to consistently meet the "Emission Standard of Pollutants for Coking Chemical Industry" (GB16171-2012), and frequently exceeds the standards for SS, COD, and total nitrogen. Furthermore, the effluent fails to meet the influent requirements for subsequent advanced treatment, increasing the treatment load on these processes. Currently, domestic methods for advanced treatment generally employ processes such as "coagulation + adsorption + advanced oxidation." A coal chemical enterprise in Northwest China uses "activated carbon adsorption tank + coagulation + filtration adsorption tank" for subsequent treatment, achieving Class I discharge standards for its effluent. Other methods utilize a combined process of "sand filtration + ozone oxidation + MBR / powdered activated carbon (PAC)" for advanced treatment of coal gas wastewater, with the effluent reused in the circulating water system. However, these treatment methods still have some problems, such as excessively long and complex treatment processes, large footprints, numerous pieces of equipment, complex operation, high operating costs, and issues like severe membrane fouling leading to membrane clogging and expensive membrane replacement costs. Utility Model Content
[0004] To address the aforementioned problems, this invention proposes a ceramic flat-plate membrane system for recycling wastewater from coal chemical waste, which can effectively solve one of the problems mentioned above.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A ceramic flat-sheet membrane system for recycling wastewater from coal chemical industry, comprising:
[0007] Ceramic membrane tank, the ceramic membrane tank has a ceramic flat sheet membrane inside;
[0008] The water production tank is connected to the downstream side of the ceramic flat sheet membrane via a water production pipe.
[0009] A water production pump is installed on the water production pipe.
[0010] A backwash pump, the input end of which is connected to the product water tank via a pipeline, and the output end of which is connected to the wastewater side of the ceramic flat sheet membrane;
[0011] The bottom of the ceramic membrane tank is equipped with a sludge discharge pipe, and a sludge discharge pump is installed on the sludge discharge pipe.
[0012] Preferably, the product water pipe is connected to a vacuum pipe, which is used to remove air from the output pipe of the ceramic membrane tank and the ceramic flat sheet membrane module to ensure stable product water operation.
[0013] Preferably, the coal chemical wastewater ceramic flat sheet membrane water reuse system further includes a scrubbing blower. The gas output end of the scrubbing blower is connected to the bottom of the ceramic membrane tank through an aeration pipe. The scrubbing blower is used to use air to scrub the surface of the ceramic flat sheet membrane with bubbles.
[0014] Preferably, the aeration pipe is provided with an automatic exhaust port.
[0015] Preferably, the coal chemical wastewater ceramic flat sheet membrane water reuse system further includes a chemical washing system, the output end of which faces the ceramic flat sheet membrane, and the chemical washing system includes a sodium hypochlorite dosing system and / or a citric acid dosing system.
[0016] The sodium hypochlorite dosing system includes a sodium hypochlorite dosing pump and a sodium hypochlorite dosing tank. The sodium hypochlorite dosing tank is connected to the ceramic flat membrane via a pipeline. The sodium hypochlorite dosing pump is installed on the pipeline between the sodium hypochlorite dosing tank and the ceramic flat membrane.
[0017] The sodium chlorate dosing system includes a citric acid dosing pump and a citric acid dosing tank. The citric acid dosing tank is connected to the ceramic flat membrane via a pipeline. The citric acid dosing pump is located on the pipeline between the citric acid dosing tank and the ceramic flat membrane.
[0018] Preferably, the chemical washing system further includes a chemical washing water pump, the input end of which is connected to the product water tank via a pipeline, and the output end of which is connected to the output end of the sodium chlorate dosing system and / or the citric acid dosing system.
[0019] Preferably, the ceramic flat sheet membrane is a membrane with porous channels formed by bonding uniform nano-sized ceramic particles.
[0020] Preferably, the average diameter of the pore channels of the ceramic membrane is 10-200 nm, and the ceramic particles are made of metal oxide ceramic.
[0021] The beneficial effects of using this utility model are:
[0022] (1) It has strong adaptability, low requirements for influent water quality, strong anti-pollution ability, adopts a new type of functional nano-ceramic flat sheet membrane, has high flux, long service life, up to 15 years or more, and low operating cost.
[0023] (2) The new functional nano-ceramic flat sheet membrane is used. After the membrane is fouled, it only needs simple maintenance cleaning or chemical cleaning. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the coal chemical wastewater ceramic flat sheet membrane water reuse system of this utility model.
[0025] Figure label:
[0026] 1-Inlet gate, 2-Ceramic membrane tank, 3-Product water pipe, 4-Product water pump, 5-Product water tank, 6-Vacuum pipe, 7-Scrubber blower, 8-Automatic exhaust port, 9-Backwash pump, 10-Sodium hypochlorite dosing pump, 11-Sodium hypochlorite dosing tank, 12-Citrate dosing tank, 13-Citrate dosing pump, 14-Clean water pump, 15-Sludge pump. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this technical solution clearer, the following detailed description, in conjunction with specific embodiments, further illustrates this technical solution. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this technical solution.
[0028] like Figure 1 As shown in the figure, this embodiment proposes a ceramic flat sheet membrane water reuse system for coal chemical wastewater. The filtration device of the system is a ceramic membrane tank 2. The interior of the ceramic membrane tank 2 is a filtration device with ceramic flat sheet membrane modules as the main filtration body. An inlet gate 1 is set at the front of the ceramic membrane tank 2. Coal chemical wastewater is input by opening and closing the inlet gate 1, which can be controlled by a program.
[0029] The product water tank 5 is connected to the side of the ceramic flat sheet membrane after filtration via the product water pipe 3. Specifically, after the raw water enters the ceramic membrane tank 2, the water treated by the ceramic flat sheet membrane reaction tank is collected through the pipe and pumped out under pressure by the product water pump 4, and the effluent enters the product water tank 5.
[0030] The pipeline connecting the permeate pump 4 to the ceramic flat sheet membrane module is equipped with a vacuum pipe 6. The vacuum unit can remove air from the ceramic membrane unit pipeline and the ceramic flat sheet membrane module in the ceramic membrane tank 2 through the vacuum pipe 6, ensuring stable permeate operation.
[0031] The input end of the backwash pump 9 is connected to the product water tank 5 through a pipeline, and the output end of the backwash pump 9 is connected to the wastewater side of the ceramic flat sheet membrane. The ceramic flat sheet membrane module is connected to a backwash pipe, and the backwash pump 9 can use the effluent from the product water tank 5 to backwash the ceramic flat sheet membrane through the pipeline.
[0032] The coal chemical wastewater ceramic flat sheet membrane water reuse system also includes a chemical washing system. The output end of the chemical washing system faces the ceramic flat sheet membrane. The chemical washing system includes a sodium hypochlorite dosing system and a citric acid dosing system. The sodium hypochlorite dosing system includes a sodium hypochlorite dosing pump 10 and a sodium hypochlorite dosing tank 11. The sodium hypochlorite dosing tank 11 is connected to the ceramic flat sheet membrane through a pipeline. The sodium hypochlorite dosing pump 10 is installed on the pipeline between the sodium hypochlorite dosing tank 11 and the ceramic flat sheet membrane.
[0033] The sodium chlorate dosing system includes a citric acid dosing pump 13 and a citric acid dosing tank 12. The citric acid dosing tank 12 is connected to the ceramic flat sheet membrane via a pipeline, and the citric acid dosing pump 13 is located on the pipeline between the citric acid dosing tank 12 and the ceramic flat sheet membrane. The chemical washing system also includes a chemical washing water pump 14. The input end of the chemical washing water pump 14 is connected to the product water tank 5 via a pipeline, and the output end of the chemical washing water pump 14 is connected to the output end of the sodium chlorate dosing system and / or the citric acid dosing system. This system can chemically wash the ceramic flat sheet membrane module through the chemical washing pipeline.
[0034] Ceramic flat sheet membranes are membranes with porous channels formed by bonding uniform nanoscale ceramic particles. The average diameter of the pore channels in ceramic membranes is 10–200 nm. The ceramic particles are made of metal oxide ceramics.
[0035] In this invention, an inlet gate 1 is installed in front of the ceramic membrane tank 2, which can automatically open and close to control the water flow into the ceramic membrane tank 2. Raw water enters the ceramic membrane tank 2, and the water treated by the ceramic flat-plate membrane reactor is collected through a pipeline into the permeate pipe 3. The permeate pump 4 then draws water under pressure, and the water flows into the permeate tank 5. A vacuum pipe 6 is installed on the pipeline connecting the permeate pump 4 to the ceramic flat-plate membrane module. The vacuum unit can remove air from the ceramic flat-plate membrane pipeline and the ceramic flat-plate membrane module to ensure stable permeate operation. An aeration pipe is installed at the bottom of the ceramic membrane tank 2, and a scrubbing blower 7 can use air to perform bubble scrubbing on the surface of the ceramic flat-plate membrane. An automatic exhaust port 8 is installed on the aeration pipe, which can automatically perform air-water backwashing to avoid clogging. The ceramic flat-plate membrane module is connected to a backwash pipe, and a backwash pump 9 can use the water from the permeate tank 5 to backwash the ceramic flat-plate membrane through the pipeline. The ceramic flat-sheet membrane module is connected to a chemical washing pipeline. The dosing unit includes a sodium hypochlorite dosing tank 11, a sodium hypochlorite dosing pump 10, a citric acid dosing tank 12, a citric acid dosing pump 13, and a chemical washing water pump 14. Chemical washing of the ceramic flat-sheet membrane module can be performed through the chemical washing pipeline. A sludge discharge pipeline is located at the bottom of the ceramic membrane tank 2. The sludge discharge pump 15 is connected to the sludge discharge pipeline at the bottom of the membrane tank via fittings for periodic sludge discharge.
[0036] This equipment also includes an electrical control system, which is electrically connected to the aforementioned inlet gate 1, product water pump 4, scrubbing blower 7, automatic exhaust port 8, backwash pump 9, sodium hypochlorite dosing pump 10, citric acid dosing pump 13, chemical washing water pump 14, and sludge discharge pump 15. The electrical control system is PLC-controlled, and the entire system can achieve fully automated operation. This technology has a good effect on treating coal chemical wastewater, and the effluent quality and quantity are stable.
[0037] The above content is only a preferred embodiment of this utility model. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the ideas of this technical content. As long as these changes do not depart from the concept of this utility model, they all fall within the protection scope of this patent.
Claims
1. A ceramic flat-sheet membrane system for recycling wastewater from coal chemical industry, characterized in that: include Ceramic membrane tank, the ceramic membrane tank has a ceramic flat sheet membrane inside; The water production tank is connected to the downstream side of the ceramic flat sheet membrane via a water production pipe. A water production pump is installed on the water production pipe. A backwash pump, the input end of which is connected to the product water tank via a pipeline, and the output end of which is connected to the wastewater side of the ceramic flat sheet membrane; The bottom of the ceramic membrane tank is equipped with a sludge discharge pipe, and a sludge discharge pump is installed on the sludge discharge pipe.
2. The coal chemical wastewater ceramic flat sheet membrane water reuse system according to claim 1, characterized in that: The product water pipe is connected to a vacuum pipe, which is used to remove air from the output pipe of the ceramic membrane tank and the ceramic flat sheet membrane module to ensure stable product water operation.
3. The coal chemical wastewater ceramic flat sheet membrane water reuse system according to claim 1, characterized in that: The coal chemical wastewater ceramic flat sheet membrane water reuse system also includes a scrubbing blower. The gas output end of the scrubbing blower is connected to the bottom of the ceramic membrane tank through an aeration pipe. The scrubbing blower is used to use air to scrub the surface of the ceramic flat sheet membrane with bubbles.
4. The coal chemical wastewater ceramic flat sheet membrane water reuse system according to claim 3, characterized in that: The aeration pipe is equipped with an automatic exhaust port.
5. The coal chemical wastewater ceramic flat sheet membrane water reuse system according to claim 1, characterized in that: The coal chemical wastewater ceramic flat sheet membrane water reuse system also includes a chemical washing system, the output end of which faces the ceramic flat sheet membrane, and the chemical washing system includes a sodium hypochlorite dosing system and / or a citric acid dosing system. The sodium hypochlorite dosing system includes a sodium hypochlorite dosing pump and a sodium hypochlorite dosing tank. The sodium hypochlorite dosing tank is connected to the ceramic flat membrane via a pipeline. The sodium hypochlorite dosing pump is installed on the pipeline between the sodium hypochlorite dosing tank and the ceramic flat membrane. The sodium chlorate dosing system includes a citric acid dosing pump and a citric acid dosing tank. The citric acid dosing tank is connected to the ceramic flat membrane via a pipeline. The citric acid dosing pump is located on the pipeline between the citric acid dosing tank and the ceramic flat membrane.
6. The coal chemical wastewater ceramic flat sheet membrane water reuse system according to claim 5, characterized in that: The chemical washing system also includes a chemical washing water pump, the input end of which is connected to the product water tank via a pipeline, and the output end of which is connected to the output end of the sodium chlorate dosing system and / or the citric acid dosing system.
7. The coal chemical wastewater ceramic flat sheet membrane water reuse system according to claim 1, characterized in that: The ceramic flat sheet membrane is formed by bonding uniform nano-sized ceramic particles to create a membrane with porous channels.
8. The coal chemical wastewater ceramic flat sheet membrane water reuse system according to claim 7, characterized in that: The ceramic membrane has an average pore channel diameter of 10–200 nm, and the ceramic particles are made of metal oxide ceramic.