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Sand-slag co-removal efficient pretreatment system and process

A pretreatment and high-efficiency technology, which is applied in the direction of reversed device, filter separation, fixed filter element filter, etc., which can solve the problem of low filtration accuracy and interception efficiency, reduced sewage treatment effect, equipment and pipelines. Wear and other problems, to achieve the effect of improving the removal rate, reducing land occupation and civil construction costs, and reducing civil construction requirements

Active Publication Date: 2021-07-23
SCIMEE TECH & SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems existing in the existing municipal sewage pretreatment process when the method of removing slag first and then removing sand is used for pretreatment. The sand removal efficiency of the process is low, and it is easy to aggravate the problems of follow-up equipment and pipeline wear, blockage, and reduced sewage treatment effect. A high-efficiency pretreatment system for sand and slag removal is provided, which is carried out by first removing sand and then removing slag. Municipal sewage pretreatment can effectively solve the technical problems mentioned above, and the specific idea is as follows:

Method used

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  • Sand-slag co-removal efficient pretreatment system and process
  • Sand-slag co-removal efficient pretreatment system and process

Examples

Experimental program
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Effect test

Embodiment 1

[0037] see figure 1 In this embodiment, a high-efficiency pretreatment system for co-removal of sand and slag is provided, including a slag removal unit and a sand removal unit. The slag removal unit includes a delivery pump 101, a hydrocyclone 102, and a sand-water separator 103. The unit comprises an orifice grill apparatus 104, a constructed flow channel 106, and a screw press 105, wherein,

[0038] In this embodiment, the upper part of the hydrocyclone 102 is provided with an overflow port and a water inlet, and the lower end of the hydrocyclone 102 is provided with a sand outlet, and the delivery pump 101 is connected to the water inlet of the hydrocyclone 102 through the pipeline 110 connected, such as figure 1 As shown, the delivery pump 101 is used to pressurize the sewage to be treated. On the one hand, the upstream sewage to be treated can smoothly enter the hydrocyclone 102 under the delivery of the delivery pump 101; The device 102 needs a pressure of about 0.06-...

Embodiment 2

[0053] In order to solve the problem of increasing the concentration of sand discharged from the grit chamber at the bottom of the hydrocyclone 102, the main difference between this embodiment 2 and the above-mentioned embodiment 1 is that in the high-efficiency pretreatment system for co-removing sand and slag provided by this embodiment, there is also including the controller and valve 202, such as figure 2 As shown, the sand outlet is connected with a sand discharge pipe 201, the valve 202 is installed on the sand discharge pipe 201, and the underflow box 203 is arranged below the sand discharge pipe 201, as figure 2 As shown, to undertake the sand-water mixture;

[0054] The controller is connected with the valve 202, and the controller is used for controlling the opening / closing of the valve 202 at regular intervals, and controlling the duration of the valve 202 being kept open. That is, in this embodiment, by setting the controller and the valve 202, the controller ca...

Embodiment 3

[0059] According to the high-efficiency pretreatment system for co-removal of sand and slag provided in Example 2, this embodiment provides a high-efficiency pretreatment process for co-removal of sand and slag, including the following process:

[0060] 1. Use the delivery pump 101 to input the sewage into the hydrocyclone 102, and the hydrocyclone 102 uses centrifugal force to settle and separate the sand and grid residue in the sewage to form a sand-water mixture, and the sewage after separating the sand-water mixture is input into the orifice grid Grid equipment 104, to utilize the orifice grid equipment 104 to further intercept the sand and grid slag in the sewage, to achieve the purpose of efficiently intercepting sand and grid slag; the water output in the orifice grid equipment 104 is input into the subsequent treatment unit, and The screen residue water separated from the orifice grid equipment 104 is sent to the screw press 105 to separate the screen residue and water,...

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Abstract

The invention relates to a sand-slag co-removal efficient pretreatment system and process, the pretreatment system comprises a slag removal unit and a sand removal unit, the slag removal unit comprises a hydrocyclone, and the sand removal unit comprises pore plate grating equipment; an overflow port of the hydrocyclone is communicated with the water inlet end of the pore plate grating equipment, the hydrocyclone settles and separates sand grains and grating slag by utilizing centrifugal force, and the pore plate grating equipment is used for further intercepting the sand grains and the grating slag; according to the pretreatment system, municipal sewage pretreatment is carried out by adopting a mode of firstly removing sand and then removing slag, so that the sand removal efficiency can be remarkably improved, the removal rate of fine sand of more than 100 microns can reach 90%, and the fine sand can be effectively prevented from entering the subsequent treatment unit; therefore, abrasion of process equipment and pipelines can be effectively reduced, the problems that MLVSS / MLSS is reduced, the sludge yield is increased, and the follow-up sludge treatment difficulty is large are avoided, sand grains and grating slag in sewage can be further intercepted with high precision and high removal rate, and the slag / sand removal rate is increased.

Description

technical field [0001] The invention relates to the technical field of sewage treatment equipment, in particular to an efficient pretreatment system and process for co-removing sand and slag. Background technique [0002] Sewage pretreatment is a pretreatment facility set up according to the water quality requirements of the follow-up treatment process before the sewage enters the traditional biological treatment process. Its main function is to use the principle of filtration and separation to remove sand and slag. In the treatment, the grid is usually used to remove the slag, and the traditional cyclone grit chamber is used to remove the sand. [0003] However, in the existing municipal sewage pretreatment process, the method of removing slag first and then removing sand is generally used for sewage pretreatment. On the one hand, the filtration accuracy is not high enough, the interception efficiency is low, the sealing is poor, and it is easy to block. , especially the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D29/03B04C5/00
CPCB01D29/03B04C5/00
Inventor 毕永伟舒峰袁华洁蒋红光张勤杨瑞连杨小林
Owner SCIMEE TECH & SCI CO LTD
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