CN-121974417-A - Small-flow acid mine wastewater treatment system and treatment method

CN121974417ACN 121974417 ACN121974417 ACN 121974417ACN-121974417-A

Abstract

The invention discloses a small-flow acid mine wastewater treatment system and a treatment method, and belongs to the technical field of sewage treatment equipment. The technical problem to be solved is that the removal efficiency of the heavy metal sludge such as pH, iron and manganese in the acid mine wastewater is not high. The technical scheme main points include that according to waste water treatment order sets gradually first barrel, treatment tank and second barrel, be equipped with first filter component in the first barrel, be equipped with agitating unit and aeration equipment in the treatment tank, the intercommunication has the dosing tube on the lateral wall of treatment tank, be equipped with stirring subassembly and second filter component in the second barrel, the second filter component is collected mud in the waste water that stirring subassembly stirs.

Inventors

ZHAO WENDE
HAN ZHANTAO
YANG BINHE
LI JINCHAO
ZHANG WEN
CHEN RI
ZHAO XUEHAO

Assignees

生态环境部土壤与农业农村生态环境监管技术中心

Dates

Publication Date: 20260505
Application Date: 20260226

Claims (10)

1. The small-flow acid mine wastewater treatment system is characterized by comprising a first barrel (1), a treatment tank (2) and a second barrel (3) which are sequentially arranged according to a wastewater treatment sequence, wherein a first filter assembly (5) is arranged in the first barrel (1), a stirring device (16) and an aeration device (17) are arranged in the treatment tank (2), a dosing tube (13) is communicated with the side wall of the treatment tank (2), a stirring assembly (19) and a second filter assembly (18) are arranged in the second barrel (3), and the second filter assembly (18) is used for collecting sludge in wastewater stirred by the stirring assembly (19).
2. The small-flow acid mine wastewater treatment system according to claim 1, wherein an installation groove is formed in the inner wall of the first barrel (1), a supporting ring (6) is arranged in the installation groove, a gap exists between the supporting ring (6) and the inner top surface of the installation groove, and a discharge pipe (9) is communicated with the side wall of the first barrel (1); The first filtering component (5) comprises a rotary table (51) and a baffle plate (52), the rotary table (51) is made of a filter screen, the rotary table (51) is integrally hollow round table-shaped, the edge of the rotary table (51) extends into the mounting groove, the baffle plate (52) is arranged on the rotary table (51) at intervals, a mounting plate (7) is arranged on the top surface of the first barrel (1), and a first driving motor (8) for driving the rotary table (51) to rotate is arranged on the mounting plate (7).
3. The small-flow acid mine wastewater treatment system according to claim 2, wherein a yielding groove is formed in the top surface of the supporting ring (6), balls (10) are arranged in the yielding groove, and the turntable (51) is arranged on the balls (10); The support ring (6) is connected with the first cylinder body (1) through the locating pin (11), the locating pin (11) comprises a rod part (111), an expansion part (112) and a limiting part (113), the expansion part (112) and the limiting part (113) are arranged at two ends of the rod part (111) in the length direction, the expansion part (112) is integrally conical, and an expansion groove (114) for dividing the expansion part (112) into a plurality of parts is formed in the expansion part (112); the connecting hole communicated with the expansion groove (114) is formed in the rod portion (111), a plug (115) is connected in the connecting hole in a threaded mode, and the diameter of one end, close to the expansion portion (112), of the plug (115) is gradually increased along the direction away from the rod portion (111).
4. The small-flow acid mine wastewater treatment system as claimed in claim 1, wherein a cleaning assembly (12) is arranged on the inner wall of the first barrel (1), the cleaning assembly (12) comprises a first cleaning pipe (121) and a second cleaning pipe (122), the first cleaning pipe (121) is arranged below the first filtering assembly (5), the second cleaning pipe (122) is arranged above the first filtering assembly (5), and a plurality of spray heads (123) are communicated with the first cleaning pipe (121) and the second cleaning pipe (122).
5. The small-flow acid mine wastewater treatment system of claim 1, wherein the stirring assembly (19) comprises a bottom plate (191) and a stirring shaft (192), the bottom plate (191) is arranged on the inner bottom surface of the second cylinder (3), the stirring shaft (192) is arranged on the bottom plate (191), a plurality of stirring plates (193) are arranged on the bottom plate (191), a guide plate (194) is arranged on the stirring shaft (192), the guide plate (194) is spiral, and a second driving motor (195) for driving the bottom plate (191) to rotate is fixed on the bottom surface of the second cylinder (3).
6. The small-flow acid mine wastewater treatment system as set forth in claim 1, wherein the second filtering component (18) comprises a plurality of connecting rods (181) and filtering net bags (182), the filtering net bags (182) are provided with a plurality of connecting rods (181) which are mutually hinged, each connecting rod (181) is provided with one filtering net bag (182), and the inner wall of the second cylinder (3) is provided with a clamping groove (20) for the connecting rods (181) to clamp in.
7. The small-flow acidic mine wastewater treatment system of claim 6, wherein the filter string bag (182) comprises a frame body (1821) and a baffle cover (1822), the frame body (1821) is made of a frame and a filter screen, the frame body (1821) is a container with one surface open, the baffle cover (1822) is arranged in the opening of the frame body (1821), a baffle block (1823) is arranged on the frame body (1821), and one surface of the baffle block (1823) facing the inside of the frame body (1821) is an inclined surface.
8. The small-flow acid mine wastewater treatment system of claim 1, further comprising a filter pressing device (4), wherein the filter pressing device (4) comprises a barrel body (41) and a pressing plate (42), a frame is arranged on the outer wall of the barrel body (41), a hydraulic cylinder (43) is arranged on the frame, a piston rod of the hydraulic cylinder (43) faces into the barrel body (41), the pressing plate (42) is arranged on the piston rod of the hydraulic cylinder (43), a filter plate (44) is arranged in the barrel body (41), the inner cavity of the barrel body (41) is divided into two parts by the filter plate (44), and a discharge pipe (45) is communicated with the bottom end of the barrel body (41).
9. A method for treating small-flow acid mine wastewater is characterized by adopting the acid mine wastewater treatment system according to any one of claims 1-8, and further comprising the following steps: the first filter component (5) with 20-100 meshes is adopted to filter the wastewater once; Detecting the flow Q 1 and ph 1 of the wastewater entering the treatment tank (2), calculating the basic dosage M s , adding a neutralizing substance into the treatment tank (2), and neutralizing the wastewater; Detecting ph 2 of wastewater discharged from the treatment tank (2), calculating a dosing variation delta M according to ph 2 , correcting a basic dosing amount M s to obtain an actual dosing amount M, and correcting the amount of a neutralization substance added into the wastewater according to the actual dosing amount M; and adopting a 600-800-mesh second filter assembly (18) to carry out secondary filtration on the wastewater.
10. The method for treating small-flow acidic mine wastewater of claim 9, wherein the ph range of wastewater correction is smaller than the standard ph range of corresponding treatment.

Description

Small-flow acid mine wastewater treatment system and treatment method Technical Field The invention relates to the technical field of sewage treatment equipment, in particular to a small-flow acid mine wastewater treatment system and a treatment method. Background The acidic water for coal mine refers to mine drainage water with pH value of <6, and the pH value is generally 2.3-5.7. The water contains Fe 2+、Fe3+、Mn2+、SO42- and other metal ions, and the concentration of SO 42- is high. The mineralization degree and the hardness of the acid mine wastewater increase with the decrease of the pH value. The release route of the acid mine wastewater can be divided into three stages. During production, the groundwater level is low, at which time accumulation is difficult to form. During the mining process, acidic substances generated by oxidation of minerals are discharged along with the water discharged during the mining process. After the pit is closed, water drainage is stopped, the underground water level gradually rises, the mine tunnel is filled with water, the underground water reacts with minerals oxidized previously, acidic components are promoted to be dissolved and enriched, and wastewater is formed. Entering the overflow stage, the groundwater level continuously rises, either rushes out of the ground surface or merges into the river. Whether the waste water is gushed out of the ground surface or is gathered into a river, the original clean water source is polluted, so that once the pollution condition of the abandoned mine is found, the waste water is particularly important to treat. Because the wastewater is wrapped with a large amount of sludge formed by silt, slag and the like, when the wastewater is treated, the sedimentation tank and the grit chamber are utilized to pretreat the wastewater, so that the sludge in the wastewater is settled, the subsequent further treatment of the wastewater is facilitated, and the related technology is mature. However, the acid mine wastewater has the characteristic of extremely unstable chemical composition, the composition of the acid mine wastewater can be changed along with the change of seasons and even day and night, the water quality fluctuation is large, and particularly, the wastewater with small flow, namely mine water with flow less than or equal to 1000 square/day, is changed due to the fact that most of underground water seeps, the underground water pressure is changed, and the wastewater is more variable due to the unstable flow. The traditional sedimentation tank needs to wait for the sedimentation of sludge statically to remove the sludge in the wastewater, and the properties such as the density and the viscosity of the wastewater are changed due to the change of the wastewater, so that the sedimentation time of the sludge is also changed, the sedimentation time of the wastewater in the sedimentation tank is generally based on a longer standard, and the sludge removal efficiency is not high. Disclosure of Invention The invention aims to provide a small-flow acid mine wastewater treatment system and a treatment method, which are used for solving the technical problem of low removal efficiency of heavy metal sludge such as pH, iron, manganese and the like in acid mine wastewater. Description of the terminology: Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the claimed subject matter belongs. All patents, patent inventions, and publications cited herein are incorporated by reference in their entirety unless otherwise indicated. If there are multiple definitions of terms herein, the definitions of this chapter shall control. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the subject matter of the invention, as claimed. In the present invention, the singular is used to include the plural unless specifically stated otherwise. It should also be noted that the use of "or" means "and/or" unless stated otherwise. Furthermore, the terms "include," as well as other forms, such as "comprising," "including," and "containing," are not limiting. The invention provides a small-flow acid mine wastewater treatment system which comprises a first barrel, a treatment tank and a second barrel which are sequentially arranged according to a wastewater treatment sequence, wherein a first filter assembly is arranged in the first barrel, a stirring device and an aeration device are arranged in the treatment tank, a dosing pipe is communicated with the side wall of the treatment tank, a stirring assembly and a second filter assembly are arranged in the second barrel, and the second filter assembly is used for collecting sludge in wastewater stirred by the stirring assembly. Further, an installation groove is formed in the inner wall of the first