Flushing water pipeline structure of wastewater pretreatment system

Abstract

The utility model discloses a flushing water pipeline structure of a wastewater pretreatment system. The flushing water pipeline structure comprises a produced water filtering pipeline for connecting a produced water tank of a coagulative precipitation tank and a sewage filter; the sludge conveying pipeline is used for connecting the sludge hopper of the coagulative precipitation tank and the sludge dewatering machine; a flushing pipeline is arranged between the produced water filtering pipeline and the sludge conveying pipeline, and the flushing pipeline is used for taking water to be filtered in the produced water filtering pipeline to flush the sludge conveying pipeline and / or equipment. According to the utility model, the water to be filtered in the produced water filtering pipeline is used as a water source, and then the sludge conveying pipeline and / or equipment are flushed through the flushing pipeline, so that the produced water in the pretreatment system is recycled, an external water source does not need to be connected, the resource utilization rate is improved, and the treatment burden of a subsequent evaporative crystallization system is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a flushing water pipeline structure for a wastewater pretreatment system. Background Technology

[0002] With the rapid development of my country's industry, a large amount of high-salinity wastewater is generated during industrial production. This type of wastewater is highly corrosive, biodegradable, and environmentally polluting. In the pretreatment stage, processes such as coagulation, sedimentation, and flotation are mainly used to form flocs from colloids and suspended solids in the wastewater in the coagulation sedimentation tank, which are then separated in the sedimentation tank. This process can remove most of the calcium and magnesium ions, heavy metal ions, organic matter, and suspended solids from the wastewater. Furthermore, a certain amount of sludge is generated during the entire wastewater pretreatment process. After preliminary sludge-water separation in the sedimentation tank, the sludge further settles in the sludge hopper, facilitating subsequent sludge dewatering. The supernatant after sludge-water separation overflows into the product water tank, is filtered, and then further treated through a subsequent evaporation and crystallization system.

[0003] During sludge transport within pipelines, material deposits can easily accumulate on the inner walls, reducing the flow area, increasing resistance, and affecting the normal operation of the system. The deposits may also contain corrosive components, damaging the pipelines. Therefore, regular hydraulic flushing of the entire system is necessary. However, current hydraulic flushing methods involve introducing external water sources (such as tap water), which wastes water resources and increases the processing burden on subsequent evaporation and crystallization systems.

[0004] Therefore, it is necessary to provide a flushing water pipeline structure for a wastewater pretreatment system to overcome the above-mentioned defects. Utility Model Content

[0005] The purpose of this invention is to provide a flushing water pipeline structure for a wastewater pretreatment system, aiming to improve the problem that existing wastewater pretreatment systems require additional water sources for hydraulic flushing of various sludge conveying pipelines and / or equipment.

[0006] To achieve the above objectives, this utility model provides a flushing water pipeline structure for a wastewater pretreatment system, comprising:

[0007] A product water filtration pipeline is used to connect the product water tank of the coagulation sedimentation tank and the wastewater filter; the product water filtration pipeline is used to transport the water to be filtered in the product water tank to the wastewater filter for filtration.

[0008] The sludge conveying pipeline is used to connect the sludge hopper of the coagulation sedimentation tank to the sludge dewatering machine; the sludge conveying pipeline is used to transport the sludge-containing wastewater in the sludge hopper to the sludge dewatering machine for dewatering, and / or to recirculate a portion of the sludge-containing wastewater back to the front end of the coagulation sedimentation tank.

[0009] A flushing pipe is provided between the product water filtration pipeline and the sludge conveying pipeline. The flushing pipe is used to take the water to be filtered from the product water filtration pipeline to flush the sludge conveying pipeline and / or the sludge dewatering machine.

[0010] In a preferred embodiment, the sludge conveying pipeline includes a sludge discharge branch and a dewatering branch. The sludge discharge branch is used to convey the sludge-containing wastewater in the sludge hopper to the sludge storage tank, and the dewatering branch is used to convey the sludge-containing wastewater in the sludge storage tank to the sludge dewatering machine.

[0011] The flushing pipeline includes a flushing main line connected at one end to the product water filtration pipeline, and a first flushing branch line and a second flushing branch line both leading out from the flushing main line.

[0012] The first flushing branch is used to flush the sludge discharge branch, and the second flushing branch is used to flush the dewatering branch.

[0013] In a preferred embodiment, the sludge conveying pipeline further includes a sludge circulation branch line connected in parallel with the sludge discharge branch line; the sludge circulation branch line is used to return the sludge-containing wastewater in the sludge hopper to the front end of the coagulation sedimentation tank; the flushing pipeline further includes a third flushing branch line led out from the flushing main line, the third flushing branch line being used to flush the sludge circulation branch line.

[0014] In a preferred embodiment, the flushing pipeline further includes a fourth flushing branch branch extending from the main flushing line, the fourth flushing branch branch being used to flush the sludge dewatering machine.

[0015] In a preferred embodiment, the product water filtration pipeline is further connected to a filter backwashing branch, which is used to flush the product water pipeline of the sewage filter.

[0016] The flushing water pipeline structure of the wastewater pretreatment system provided by this utility model uses the water to be filtered in the product water filtration pipeline as the water source, and then uses the flushing pipeline to flush the sludge conveying pipeline and / or sludge dewatering machine and other equipment. This realizes the recycling of the product water inside the pretreatment system, eliminates the need to connect to an external water source, improves resource utilization, and reduces the processing burden of the subsequent evaporation and crystallization system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the flushing water pipeline structure of the wastewater pretreatment system provided by this utility model.

[0019] The diagram is labeled as follows: 100, flushing water pipeline structure of the wastewater pretreatment system; 200, coagulation sedimentation tank; 201, sludge hopper; 202, product water tank; 300, wastewater filter; 301, product water pipeline; 400, sludge storage tank; 500, sludge dewatering machine.

[0020] 10. Product water filtration pipeline; 11. Filter backwashing branch; 20. Sludge conveying pipeline; 21. Sludge discharge branch; 22. Dewatering branch; 23. Sludge circulation branch; 30. Flushing pipeline; 31. Flushing main line; 32. First flushing branch; 33. Second flushing branch; 34. Third flushing branch; 35. Fourth flushing branch. Detailed Implementation

[0021] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are merely for explaining the present utility model and are not intended to limit the present utility model.

[0022] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0023] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0024] It should be noted that before describing the structure of this utility model in detail, some equipment of the wastewater pretreatment system that may be involved will be described:

[0025] The coagulation sedimentation tank 200 is used to promote the flocculation and precipitation of impurities such as calcium and magnesium ions, heavy metal ions, organic matter and suspended solids in wastewater after reacting with added agents. After preliminary sludge-water separation, these precipitates are settled in the sludge hopper 201 to form sludge, while the supernatant after sludge-water separation overflows into the product water tank 202 for collection.

[0026] Wastewater filter 300, such as scraper self-cleaning filter, fiber ball filter, etc., is used to filter the clear liquid (i.e. the water to be filtered) in the product water tank 202, and further adsorb and filter out the solid suspended particles in the water, so that the filtered water can enter the subsequent evaporation and crystallization system for evaporation and crystallization. The filtered solid suspended particles are periodically discharged through the forward and backwashing process.

[0027] Sludge storage tank 400 is used to temporarily store sludge discharged from sludge hopper 201;

[0028] Sludge dewatering machine 500, such as screw press sludge dewatering machine, is used to dewater sludge conveyed from sludge storage tank 400.

[0029] In an embodiment of this utility model, a flushing water pipeline structure 100 for a wastewater pretreatment system is provided for periodically or irregularly flushing the sludge conveying pipeline and equipment of the wastewater pretreatment system.

[0030] like Figure 1 As shown, the flushing water pipeline structure 100 of the wastewater pretreatment system includes: a product water filtration pipeline 10 for connecting the product water tank 202 of the coagulation sedimentation tank 200 and the wastewater filter 300, a sludge conveying pipeline 20 for connecting the sludge hopper 201 of the coagulation sedimentation tank 200 and the sludge dewatering machine 500, and a flushing pipeline 30 disposed between the product water filtration pipeline 10 and the sludge conveying pipeline 20.

[0031] The product water filtration pipeline 10 is used to transport the water to be filtered in the product water tank 202 to the wastewater filter 300 for filtration. The sludge conveying pipeline 20 is used to transport the sludge-containing wastewater in the sludge hopper 201 to the sludge dewatering machine 500 for dewatering, and / or to circulate a portion of the sludge-containing wastewater back to the front end of the coagulation sedimentation tank 200. The flushing pipeline 30 is used to take the water to be filtered from the product water filtration pipeline 10 to flush the sludge conveying pipeline 20 and / or the sludge dewatering machine 500.

[0032] Specifically, the sludge conveying pipeline 20 includes a sludge discharge branch 21 and a dewatering branch 22. The sludge discharge branch 21 is used to convey the sludge-containing wastewater in the sludge hopper 201 to the sludge storage tank 400, and the dewatering branch 22 is used to convey the sludge-containing wastewater in the sludge storage tank 400 to the sludge dewatering machine 500.

[0033] Accordingly, the flushing pipeline 30 includes a flushing main line 31 connected at one end to the product water filtration pipeline 10, and a first flushing branch line 32 and a second flushing branch line 33 both extending from the flushing main line 31. The first flushing branch line 32 is used to flush the sludge discharge branch line 21, and the second flushing branch line 33 is used to flush the dewatering branch line 22, thereby realizing independent flushing of the two sections of the sludge conveying pipeline 20 and improving the flushing effect.

[0034] Furthermore, the sludge conveying pipeline 20 also includes a sludge circulation branch 23 connected in parallel with the sludge discharge branch 21. The sludge circulation branch 23 is used to return the sludge-containing wastewater in the sludge hopper 201 to the front end of the coagulation sedimentation tank 200, thereby increasing the sludge concentration in the coagulation sedimentation tank 200. This facilitates the flocculation of solid particles generated by the reaction of calcium and magnesium impurities with the added reagents, forming a noticeable precipitate (acting as a "seed crystal"). Correspondingly, the flushing pipeline 30 also includes a third flushing branch 34 extending from the flushing main line 31. The third flushing branch 34 is used to flush the sludge circulation branch 23.

[0035] Furthermore, the flushing pipeline 30 also includes a fourth flushing branch 35 extending from the flushing main pipeline 31. The fourth flushing branch 35 is used to flush the sludge dewatering machine 500.

[0036] Furthermore, the product water filtration pipeline 10 is also connected to a filter backwashing branch 11. That is, a separate pipeline, namely the filter backwashing branch 11, is led out from the product water filtration pipeline 10, which is specifically used to flush the product water pipeline 301 of the sewage filter 300, so as to avoid easy blockage of the product water pipeline 301 at the bottom of the sewage filter 300.

[0037] It should be noted that, in order to help readers distinguish between the relevant pipelines and flushing pipelines of the wastewater pretreatment system, Figure 1 The flushing pipelines in the diagram are shown in dashed lines for ease of understanding only and are not intended to be specific limitations. Furthermore, each pipeline and branch is equipped with a drive pump and valve device to achieve the conveying function and corresponding on / off control. As a conventional technical means, this utility model does not elaborate on this, but it does not mean that these pump structures and valve devices are absent.

[0038] In summary, the flushing water pipeline structure 100 of the wastewater pretreatment system provided by this utility model uses the water to be filtered in the product water filtration pipeline 10 as the water source, and then flushes the sludge conveying pipeline and / or the sludge conveying pipeline of equipment such as the sludge dewatering machine through the flushing pipeline 30. This realizes the recycling of the product water inside the pretreatment system, eliminates the need to connect to an external water source, improves resource utilization, and reduces the processing burden of the subsequent evaporation and crystallization system.

[0039] This invention is not limited to the description in the specification and embodiments. Therefore, other advantages and modifications can be readily realized by those skilled in the art. Thus, without departing from the spirit and scope of the general concept as defined by the claims and their equivalents, this invention is not limited to the specific details, representative devices and illustrated examples shown and described herein.

Claims

1. A flushing water pipeline structure for a wastewater pretreatment system, characterized in that, The application relates to a water production and filtration system for a coagulation sedimentation tank. The water production and filtration system comprises: a water production and filtration pipeline for connecting a water production tank of a coagulation sedimentation tank and a sewage filter, and for conveying water to be filtered in the water production tank to the sewage filter for filtration; a sludge conveying pipeline for connecting a sludge tank of the coagulation sedimentation tank and a sludge dewatering machine, and for conveying sludge-containing sewage in the sludge tank to the sludge dewatering machine for dewatering, and / or for recycling part of the sludge-containing sewage back to the front end of the coagulation sedimentation tank; a flushing pipeline is arranged between the water production and filtration pipeline and the sludge conveying pipeline, and is used for taking water to be filtered in the water production and filtration pipeline to flush the sludge conveying pipeline and / or the sludge dewatering machine.

2. The rinse water line structure of the wastewater pretreatment system according to Claim 1, wherein The sludge conveying pipeline comprises a sludge discharging branch for conveying sludge-containing sewage in the sludge tank to a sludge storage tank, and a dewatering branch for conveying sludge-containing sewage in the sludge storage tank to the sludge dewatering machine. The flushing pipeline comprises a flushing main pipeline connected to the water production and filtration pipeline, and a first flushing branch and a second flushing branch both leading from the flushing main pipeline; The first flushing branch is used for flushing the sludge discharging branch, and the second flushing branch is used for flushing the dewatering branch.

3. The rinse water line structure of the wastewater pretreatment system according to Claim 2, characterized by The sludge conveying pipeline further comprises a sludge recycling branch arranged in parallel with the sludge discharging branch; the sludge recycling branch is used for recycling sludge-containing sewage in the sludge tank back to the front end of the coagulation sedimentation tank; the flushing pipeline further comprises a third flushing branch leading from the flushing main pipeline, and the third flushing branch is used for flushing the sludge recycling branch.

4. The backwash water line structure of the wastewater pretreatment system according to Claim 2, wherein The flushing pipeline further comprises a fourth flushing branch leading from the flushing main pipeline, and the fourth flushing branch is used for flushing the sludge dewatering machine.

5. The backwash water line structure of the wastewater pretreatment system according to Claim 1, wherein The water production and filtration pipeline is further connected with a filter backwashing branch, and the filter backwashing branch is used for flushing the water production pipeline of the sewage filter.

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