Industrial wastewater recycling system convenient to use and process thereof

Abstract

The invention discloses an industrial wastewater recycling system convenient to use and a process thereof, relates to the technical field of wastewater recycling systems, and solves the problems that when an existing industrial wastewater purification device is used, separation work usually needs to be carried out through multiple times of precipitation, the consumed time is long, and the requirement for batch wastewater recycling is difficult to meet. Comprising a sewage discharge channel, the sewage discharge channel is sequentially communicated with a plurality of groups of pretreatment sedimentation tanks, a plurality of pretreatment sedimentation tanks are arranged in each group, a distribution tank is arranged between every two adjacent groups of pretreatment sedimentation tanks, and wastewater settled in the previous group of pretreatment sedimentation tanks enters the distribution tanks and is distributed to the next group of pretreatment sedimentation tanks through the distribution tanks; and the last group of pretreatment sedimentation tank is communicated to the recovery tank. Precipitation is carried out through the multiple sets of pretreatment sedimentation tanks, combination of different sedimentation agents and methods is achieved, the multiple pretreatment sedimentation tanks in each set are arranged, sedimentation is carried out in sequence, and the effect of improving the industrial wastewater treatment efficiency is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater reuse systems, and in particular to an easy-to-use industrial wastewater reuse system and a process thereof. Background Art

[0002] Industrial wastewater includes production wastewater, production sewage and cooling water, and refers to wastewater and waste liquid generated in the industrial production process, which contains industrial production materials, intermediate products, by-products and pollutants generated in the production process that are lost with water. Industrial wastewater is of various types and complex composition, and may contain industrial waste, various metals, heavy metals and other toxic substances, which pollute the environment and are very harmful to human health. Therefore, according to the composition and concentration of pollutants in the wastewater, appropriate purification measures should be taken for disposal before it can be discharged; However, existing industrial wastewater purification devices usually require multiple sedimentation steps to perform separation, which is time-consuming and difficult to meet the needs of batch wastewater recovery. Summary of the invention

[0003] The purpose of the present invention is to provide an easy-to-use industrial wastewater reuse system and process thereof, which can realize the combination of different precipitation agents and methods by using multiple groups of pretreatment sedimentation tanks for sedimentation, and set up multiple pretreatment sedimentation tanks in each group, and carry out sedimentation in sequence, and distribute to the next group of pretreatment sedimentation tanks through a distribution tank, so as to avoid disturbance between different batches of wastewater and improve the treatment efficiency of industrial wastewater.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: A convenient industrial wastewater reuse system comprises a sewage discharge channel, which is sequentially connected to a plurality of groups of pretreatment sedimentation tanks. Each group of pretreatment sedimentation tanks is provided with a plurality of sewage discharge channels, and distribution tanks are provided between adjacent groups of pretreatment sedimentation tanks. Wastewater precipitated in the previous group of pretreatment sedimentation tanks enters the distribution tank and is distributed to each pretreatment sedimentation tank of the next group through the distribution tank; the last group of pretreatment sedimentation tanks is connected to a recovery tank.

[0005] Furthermore, the sewage discharge channel is provided with inclined and mutually parallel coarse filter plates and scraper belts, the scraper belts include a conveyor belt and spaced scrapers on the periphery of the conveyor belt, the spaced scrapers pass over the coarse filter plates in turn, and scrape the debris on the coarse filter plates upwards to remove them.

[0006] Furthermore, the coarse filter plate includes an upper extension plate, a recovery box is provided below the upper end of the extension plate, and the interval scraper scrapes the debris on the coarse filter plate upwards and along the extension plate into the recovery box.

[0007] Furthermore, slide grooves for downward installation of the coarse filter plate are provided on opposite sides of the sewage discharge channel.

[0008] Furthermore, the coarse filter plate is provided with a plurality of sections hinged to each other.

[0009] Furthermore, a mobile dosing assembly is provided above the pretreatment sedimentation tanks of the same group, and the mobile dosing assembly reciprocates above different pretreatment sedimentation tanks and adds coagulants and flocculants thereto.

[0010] Furthermore, a disinfection tank is provided between the last set of pretreatment sedimentation tanks and the recovery tank.

[0011] Furthermore, the sludge separated in the pretreatment sedimentation tank and / or the debris in the recovery tank are introduced into a dehydration device.

[0012] The present application also discloses a convenient industrial wastewater recovery process, comprising the following steps: The industrial wastewater is passed into the sewage channel, preliminarily filtered through the coarse filter plate in the sewage channel, and then passed into several groups of pretreatment sedimentation tanks in turn. The wastewater precipitated in the previous group of pretreatment sedimentation tanks enters the distribution tank and is distributed to the pretreatment sedimentation tanks of the next group through the distribution tank; the wastewater precipitated in the last group of pretreatment sedimentation tanks is passed into the disinfection tank for disinfection, and finally passed into the recovery tank.

[0013] Furthermore, a coagulant and a flocculant are added into the pretreatment sedimentation tank to stir and re-sediment.

[0014] In summary, the present invention has the following beneficial effects: Through the coarse filter plate and the scraper belt, the debris on the coarse filter plate can be scraped upwards to be removed during filtering, and scraped along the extension plate to be recovered into the recovery box; then multiple groups of pretreatment sedimentation tanks are set up for sedimentation to achieve a combination of different precipitation agents and methods, and multiple pretreatment sedimentation tanks are set up in each group to carry out sedimentation in turn, and distributed to the next group of pretreatment sedimentation tanks through the distribution tank, so as to avoid disturbance between different batches of wastewater and improve the treatment efficiency of industrial wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an industrial wastewater reuse system that is easy to use according to the present invention; Figure 2 The present invention is a schematic diagram of the structure of a sewage discharge channel in an industrial wastewater reuse system that is easy to use.

[0016] In the figure, 1. sewage channel; 11. coarse filter plate; 111. extension plate; 12. scraper belt; 121. interval scraper; 13. recovery box; 14. chute; 2. pretreatment sedimentation tank; 3. distribution tank; 4. recovery tank; 5. disinfection tank; 6. dehydration device. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings, and this embodiment does not constitute a limitation of the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0018] An easy-to-use industrial wastewater reuse system, such as Figure 1 As shown, it includes a sewage discharge channel 1, which is connected to several groups of pretreatment sedimentation tanks 2 in sequence. Each group of pretreatment sedimentation tanks 2 is provided with several, and distribution tanks 3 are provided between adjacent groups of pretreatment sedimentation tanks 2. The wastewater precipitated in the previous group of pretreatment sedimentation tanks 2 is pumped into the distribution tank 3, and is distributed to each pretreatment sedimentation tank 2 of the next group through the corresponding different valves on the distribution tank 3 (the sewage discharge channel 1 and the distribution tank 3 are connected to different pretreatment sedimentation tanks 2 in the next group through different valves, so that industrial wastewater can be continuously passed into the empty sedimentation tanks in sequence without affecting the pretreatment sedimentation tank 2 that is being precipitated), so that multiple pretreatment sedimentation tanks 2 can work independently of each other, which is convenient for the irregular and intermittent passing of industrial wastewater, and also convenient for the maintenance and cleaning of a single pretreatment sedimentation tank 2; the last group of pretreatment sedimentation tanks 2 is connected to the disinfection tank 5, and the discharge end of the disinfection tank 5 is connected to the recovery tank 4.

[0019] like Figure 1 As shown, a mobile dosing assembly is connected above the pretreatment sedimentation tank 2 of the same group, which can be a device for dosing different pretreatment sedimentation tanks 2 through a pipeline and a valve structure, or a mobile dosing vehicle structure. Of course, it can also be replaced by a fixed dosing assembly, which is fixed above each corresponding pretreatment sedimentation tank 2; The mobile dosing component reciprocates / is connected above different pretreatment sedimentation tanks 2, and coagulants and flocculants are added to the corresponding pretreatment sedimentation tanks 2 through a dosing pump. After the coagulants and flocculants are added, they are stirred for a certain period of time so that the industrial wastewater undergoes a coagulation reaction and then gravity sedimentation. Different types or concentrations of agents are added to different groups of pretreatment sedimentation tanks 2, and different agents are selected for different types of industrial wastewater to remove impurities in the wastewater in a targeted manner. In some embodiments, the pretreatment sedimentation tank 2 can also be replaced by other filtering devices.

[0020] like Figure 2As shown, the sewage channel 1 is provided with an inclined and mutually parallel coarse filter plate 11 and a scraper belt 12, the scraper belt 12 is located above the coarse filter plate 11, and the industrial wastewater is introduced from above the coarse filter plate 11, and the floating or suspended matter in the wastewater is removed through the coarse filter plate 11. The scraper belt 12 includes conveyor belts on both sides and spaced scrapers 121 on the periphery of the conveyor belt. The spaced scrapers 121 have the same width as the coarse filter plate 11, are connected between the two conveyor belts and are arranged in an array outside the conveyor belt, and their peripheries pass over the coarse filter plate 11 in turn to scrape and remove the debris on the upper surface of the coarse filter plate 11 upwards, and the spaced scrapers 121 may have a certain elasticity, so that they are more stably abutted against the coarse filter plate 11 for scraping; The coarse filter plate 11 includes an extension plate 111 on the upper side, and a recovery box 13 is provided below the upper end of the extension plate 111. The recovery box 13 is fixed to one side of the sewage channel 1. The discharge end of the sewage channel 1 passes through the recovery box 13 to the outside, and the interval scraper 121 scrapes the debris on the coarse filter plate 11 upwards and scrapes it into the recovery box 13 along the extension plate 111.

[0021] like Figure 2 As shown, slide grooves 14 for the coarse filter plate 11 to be installed downward are fixed on opposite sides of the sewage channel 1, which facilitates the installation and removal of the coarse filter plate 11; in this embodiment, the coarse filter plate 11 is provided with a plurality of sections hinged to each other, and the hinge point is located at the lower side of the coarse filter plate 11, so as to facilitate hooking the coarse filter plate 11 of different sections when pulling out the coarse filter plate 11, thereby limiting the highest point of its upper end when pulling out (the coarse filter plate 11 pulled upward can be folded downward to a horizontal position to facilitate continued pulling).

[0022] This embodiment also discloses a convenient industrial wastewater recovery process, comprising the following steps: The industrial wastewater is passed into the sewage channel 1 and initially filtered through the coarse filter plate 11 in the sewage channel 1. Then the industrial wastewater is sequentially introduced into several groups of pretreatment sedimentation tanks 2, and each pretreatment sedimentation tank 2 is stirred and precipitated by adding coagulants and flocculants; wherein the wastewater precipitated in the previous group of pretreatment sedimentation tanks 2 first enters the distribution tank 3, and then is distributed to each pretreatment sedimentation tank 2 of the next group through the corresponding valve pipeline on the distribution tank 3; The wastewater after precipitation in the last set of pretreatment sedimentation tanks 2 is passed into the disinfection tank 5, into which chlorine is introduced and stirred to achieve disinfection, and finally passed into the recovery tank 4; The sludge separated in the pretreatment sedimentation tank 2 and the debris in the recovery tank 13 are pumped into the sludge tank, and then dehydrated by the dehydration device 6 (screw stacker), and the separated water returns to the sewage channel 1, while the mud cake is transported out for treatment.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. An industrial wastewater reuse system that is easy to use, characterized by: It includes a sewage discharge channel, which is connected to several groups of pretreatment sedimentation tanks in sequence. Each group of pretreatment sedimentation tanks is equipped with several pretreatment sedimentation tanks. Distribution tanks are arranged between adjacent groups of pretreatment sedimentation tanks. The wastewater precipitated in the previous group of pretreatment sedimentation tanks enters the distribution tank and is distributed to the pretreatment sedimentation tanks of the next group through the distribution tank; the last group of pretreatment sedimentation tanks is connected to the recovery tank.

2. The industrial wastewater reuse system according to claim 1 is characterized in that: The sewage discharge channel is provided with an inclined and mutually parallel coarse filter plate and a scraper belt, the scraper belt includes a conveyor belt and interval scrapers on the periphery of the conveyor belt, and the interval scrapers pass over the coarse filter plate in turn to scrape and remove the debris on it upwards.

3. The industrial wastewater reuse system according to claim 2 is characterized in that: The coarse filter plate comprises an extension plate on the upper side, a recovery box is provided below the upper end of the extension plate, and the interval scraper scrapes the debris on the coarse filter plate upwards and along the extension plate into the recovery box.

4. A convenient industrial wastewater reuse system according to claim 1 or 2, characterized in that: The opposite sides of the sewage discharge channel are provided with sliding grooves for the coarse filter plate to be installed downwards.

5. The industrial wastewater reuse system according to claim 4 is characterized in that: The coarse filter plate is provided with a plurality of sections which are hinged to each other.

6. The industrial wastewater reuse system according to claim 1 is characterized by: A mobile dosing assembly is arranged above the pretreatment sedimentation tanks of the same group. The mobile dosing assembly reciprocates above different pretreatment sedimentation tanks and adds coagulant and flocculant thereto.

7. An industrial wastewater reuse system that is easy to use according to claim 1 or 7, characterized in that: A disinfection tank is also provided between the last group of pretreatment sedimentation tanks and the recovery tank.

8. The industrial wastewater reuse system according to claim 3 is characterized by: The sludge separated in the pretreatment sedimentation tank and / or the debris in the recovery tank are introduced into the dehydration device.

9. A recycling process based on the easy-to-use industrial wastewater reuse system according to claim 1, characterized in that: The following steps are included: The industrial wastewater is passed into the sewage channel, preliminarily filtered through the coarse filter plate in the sewage channel, and then passed into several groups of pretreatment sedimentation tanks in turn. The wastewater precipitated in the previous group of pretreatment sedimentation tanks enters the distribution tank and is distributed to the pretreatment sedimentation tanks of the next group through the distribution tank; the wastewater precipitated in the last group of pretreatment sedimentation tanks is passed into the disinfection tank for disinfection, and finally passed into the recovery tank.

10. The industrial wastewater recycling process according to claim 9 is characterized in that: Coagulants and flocculants are added into the pretreatment sedimentation tank for stirring and re-sedimentation.

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