Multi-stage filtering and recycling device for printing and dyeing wastewater treatment

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a multistage filtering and recycling device for printing and dyeing wastewater treatment, which is characterized in that printing and dyeing wastewater automatically flows into a grating, the grating is communicated with an adjusting tank through a pipeline, the adjusting tank is provided with an acid storage tank, the adjusting tank is communicated with a reaction tank through a pipeline, and the reaction tank is provided with a flocculant tank and an oxidation decolorizing agent tank. The upper end of the reaction tank is communicated with a middle tank through a pipeline, the lower end of the reaction tank is connected with a sludge tank, the middle tank is communicated with a multi-stage filtering device through a pipeline, the multi-stage filtering device is communicated with a recycling water tank through a pipeline, the multi-stage filtering device is respectively communicated with a wastewater tank through pipelines, and the wastewater tank is communicated with a grid through a pipeline. According to the device designed by the utility model, pollutants such as suspended matters, chroma, organic matters and heavy metals in the printing and dyeing wastewater can be effectively removed through multi-stage filtration, so that the wastewater reaches the reuse standard, the wastewater treatment efficiency is improved, the cyclic utilization of the printing and dyeing wastewater is realized, and meanwhile, the water resource consumption of an enterprise is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a multi-stage filtering and recycling device for treating printing and dyeing wastewater. Background Art

[0002] Printing and dyeing wastewater usually contains high concentrations of pollutants such as organic matter, dyes, additives and inorganic salts, which have serious impacts on the environment and ecology. Traditional printing and dyeing wastewater treatment methods such as activated sludge method and chemical precipitation method can reduce the concentration of pollutants to a certain extent, but there are problems such as unstable treatment effect and easy to cause secondary pollution.

[0003] In recent years, with the improvement of environmental protection requirements and the continuous development of wastewater reuse technology, multi-stage filtration and reuse devices have been widely used in the treatment of printing and dyeing wastewater. This device can effectively remove and recycle various pollutants in printing and dyeing wastewater through multi-stage filtration and reuse technology, improve wastewater treatment efficiency, reduce treatment costs, and reduce environmental pollution.

[0004] At present, the multi-stage filtration and reuse device for printing and dyeing wastewater treatment has achieved certain results, but there are still some technical bottlenecks and challenges. For example, how to further improve filtration efficiency, reduce energy consumption, and reduce secondary pollution are still key issues that need to be solved. Therefore, research and development of more efficient and environmentally friendly multi-stage filtration and reuse devices for printing and dyeing wastewater treatment is of great significance to promoting the sustainable development of the printing and dyeing industry. Utility Model Content

[0005] Based on the problems existing in the above-mentioned background technology, the utility model proposes a multi-stage filtration and reuse device for treating printing and dyeing wastewater, the printing and dyeing wastewater flows into the grille by gravity, the grille is connected to a regulating tank through a pipeline, the regulating tank is provided with an acid storage tank, the regulating tank is connected to a reaction tank through a pipeline, the reaction tank is provided with a flocculant tank and an oxidation decolorizing agent tank, the upper end of the reaction tank is connected to an intermediate tank through a pipeline, and the lower end is connected to a sludge tank, the intermediate tank is connected to a multi-stage filtration device through a pipeline, the multi-stage filtration device is connected to a reuse water tank through a pipeline, the multi-stage filtration device is connected to a wastewater tank through a pipeline, respectively, and the wastewater tank is connected to the grille through a pipeline.

[0006] Preferably, the pipeline is connected to transport the printing and dyeing wastewater through a water pump.

[0007] Preferably, a pH value detector is installed on the regulating tank.

[0008] Preferably, the multi-stage filtration device is a sand filter, an activated carbon filter, an ultrafiltration membrane filter and a reverse osmosis membrane filter which are sequentially connected by pipelines.

[0009] Preferably, the pore size of the ultrafiltration membrane in the ultrafiltration membrane filter is in the range of 0.01-0.1 microns.

[0010] Preferably, the pore size of the reverse osmosis membrane in the reverse osmosis membrane filter is in the range of 0.0001-0.001 micrometers.

[0011] Compared with the prior art, the beneficial effects of the utility model are: 1) the device can effectively remove pollutants such as suspended matter, chromaticity, organic matter, heavy metals, etc. in printing and dyeing wastewater through multi-stage filtration, so that the wastewater meets the reuse standard and improves the wastewater treatment efficiency;

[0012] 2) Reduce treatment costs: Through multi-stage filtration and reuse, the recycling of printing and dyeing wastewater is achieved, which reduces the cost of wastewater treatment and also reduces the water consumption of enterprises;

[0013] 3) Reduce environmental pollution: The device can effectively remove pollutants in wastewater, reduce the pollution of wastewater to the environment, and is beneficial to protecting the ecological environment and human health;

[0014] 4) Easy to operate and maintain: The device has a compact structure, reasonable design, easy operation, maintenance and management, and is suitable for wastewater treatment and reuse in printing and dyeing enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a multi-stage filtration and reuse device for printing and dyeing wastewater treatment.

[0016] In the attached drawings, the names of the components represented by the various reference numerals are as follows: 1. grid; 2. regulating tank; 3. acid storage tank; 4. reaction tank; 5. flocculant tank; 6. oxidation decolorizing agent tank; 7. intermediate tank; 8. sludge tank; 9. recycled water tank; 10. wastewater tank; 11. pH detector; 12. sand filter; 13. activated carbon filter; 14. ultrafiltration membrane filter; 15. reverse osmosis membrane filter. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. 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.

[0019] The utility model relates to a multi-stage filtering and recycling device for treating printing and dyeing wastewater. The printing and dyeing wastewater flows into a grille 1 by gravity. The grille 1 is connected with a regulating tank 2 through a pipeline. The grille 1 and the regulating tank 2 are used to regulate the flow and water quality of the printing and dyeing wastewater and remove large particle impurities and suspended matter in the wastewater. An acid storage tank 3 is arranged on the regulating tank 2. The regulating tank 2 is connected with a reaction tank 4 through a pipeline. A flocculant tank 5 and an oxidation decolorant tank 6 are arranged on the reaction tank 4. The upper end of the reaction tank 4 is connected with an intermediate tank 7 through a pipeline, and the lower end is connected with a sludge tank 8. Through the separation and sedimentation process after flocculation reaction and oxidation decolorization reaction in the reaction tank 4, the supernatant in the reaction tank 4 enters the intermediate tank 7, and the solid impurities after sedimentation enter the sludge tank 8. The intermediate tank 7 is connected with a multi-stage filtering device through a pipeline. The multi-stage filtering device is connected with a recycling water tank 9 through a pipeline. The multi-stage filtering device is respectively connected with a wastewater tank 10 through pipelines, and the wastewater tank 10 is connected with the grille 1 through a pipeline.

[0020] Furthermore, the pipeline is connected to transport the printing and dyeing wastewater through a water pump.

[0021] Furthermore, a pH detector 11 is installed on the regulating tank 2 for accurately measuring the pH value of the printing and dyeing wastewater, thereby avoiding the waste of acid in the acid storage tank 3. Appropriate acid is added to the regulating tank 2 to make the pH value of the sewage in the regulating tank 2 between 6 and 7; in this way, not only can the sewage to be treated be initially close to the standard discharge value, but also the amount of acid used can be minimized.

[0022] Furthermore, the multi-stage filtration device is a sand filter 12, an activated carbon filter 13, an ultrafiltration membrane filter 14 and a reverse osmosis membrane filter connected in sequence by pipelines. The sand filter 12 and the activated carbon filter 13 are used to remove fine particles and organic matter in the wastewater and improve the transparency of the wastewater. The ultrafiltration membrane technology is used to further remove organic matter, microorganisms and colloids in the wastewater to improve the purity of the wastewater. The reverse osmosis membrane technology is used to deeply treat the wastewater to remove pollutants such as salt and heavy metals in the wastewater so that the wastewater meets the reuse standard.

[0023] Furthermore, the pore size of the ultrafiltration membrane in the ultrafiltration membrane filter 14 is in the range of 0.01-0.1 microns. The ultrafiltration membrane technology is used to further remove organic matter, microorganisms and colloidal substances in the wastewater, thereby improving the purity of the wastewater. The pore size of the ultrafiltration membrane is in the range of 0.01-0.1 microns, which can effectively intercept impurities in the wastewater.

[0024] Furthermore, the pore size of the reverse osmosis membrane in the reverse osmosis membrane filter is in the range of 0.0001-0.001 microns. Through the reverse osmosis membrane technology, the wastewater is deeply treated to remove pollutants such as salt and heavy metals in the wastewater, so that the wastewater meets the reuse standard. The pore size of the reverse osmosis membrane is in the range of 0.0001-0.001 microns, which can achieve efficient purification of wastewater.

[0025] The water source treated by the multi-stage filtration and recycling device is collected and transported to the printing and dyeing recycling pool 9 through a pipeline to achieve the recycling of wastewater. The recycling pool 9 can be designed according to actual needs to ensure a stable supply of recycled water.

[0026] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention. The protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A multi-stage filtration and recycling device for treating printing and dyeing wastewater, characterized in that: The printing and dyeing wastewater flows into the grille by gravity, and the grille is connected to a regulating tank through a pipeline, an acid storage tank is arranged on the regulating tank, and the regulating tank is connected to a reaction tank through a pipeline, and a flocculant tank and an oxidative decolorizing agent tank are arranged on the reaction tank. The upper end of the reaction tank is connected to an intermediate tank through a pipeline, and the lower end is connected to a sludge tank. The intermediate tank is connected to a multi-stage filtering device through a pipeline, and the multi-stage filtering device is connected to a reuse water tank through a pipeline. The multi-stage filtering device is connected to a wastewater tank through a pipeline respectively, and the wastewater tank is connected to the grille through a pipeline.

2. A multi-stage filtration and recycling device for treating printing and dyeing wastewater according to claim 1, characterized in that: The pipeline is connected to transport the printing and dyeing wastewater through a water pump.

3. The multi-stage filtration and recycling device for treating printing and dyeing wastewater according to claim 1, characterized in that: A pH value detector is installed on the regulating tank.

4. The multi-stage filtration and recycling device for treating printing and dyeing wastewater according to claim 1, characterized in that: The multi-stage filtering device comprises a sand filter, an activated carbon filter, an ultrafiltration membrane filter and a reverse osmosis membrane filter which are sequentially connected by pipelines.

5. The multi-stage filtration and recycling device for treating printing and dyeing wastewater according to claim 4 is characterized in that: The pore size of the ultrafiltration membrane in the ultrafiltration membrane filter is in the range of 0.01-0.1 microns.

6. The multi-stage filtration and recycling device for treating printing and dyeing wastewater according to claim 4, characterized in that: The pore size of the reverse osmosis membrane in the reverse osmosis membrane filter ranges from 0.0001 to 0.001 microns.

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