CN112390430A - Chemical industry sewage purification device for chemical plant - Google Patents

Chemical industry sewage purification device for chemical plant Download PDF

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Publication number
CN112390430A
CN112390430A CN202011156727.0A CN202011156727A CN112390430A CN 112390430 A CN112390430 A CN 112390430A CN 202011156727 A CN202011156727 A CN 202011156727A CN 112390430 A CN112390430 A CN 112390430A
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China
Prior art keywords
shell
transmission rod
bevel gear
filter
chemical
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CN202011156727.0A
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Chinese (zh)
Inventor
张钢强
米竟
闫佳伶
周立海
高楼军
焦春霞
常冬璞
周婷婷
王娜娜
柴红梅
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Yanan University
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Yanan University
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Priority to CN202011156727.0A priority Critical patent/CN112390430A/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

本发明属于污水净化技术领域，尤其是一种化工厂用化工污水净化装置，针对现有的在对污水净化时，不便于对污水散发的臭气进行处理，污染环境的问题，现提出如下方案，其包括外壳，所述外壳的顶部从左至右依次固定安装有过滤壳、搅拌壳和抽气壳，所述过滤壳、搅拌壳和抽气壳上分别转动安装有第一传动杆、第二传动杆和第三传动杆，第一传动杆的外侧固定安装有桨叶，过滤壳内固定安装有位于桨叶下方的滤网，所述第一传动杆的外侧固定套设有第一锥形齿轮和第二锥形齿轮，本发明可以对污水中的臭气进行处理，避免污染生产环境，同时可以加快滤网的过滤速度，结构简单，使用方便。

Figure 202011156727

The invention belongs to the technical field of sewage purification, in particular to a chemical sewage purification device for chemical plants. In view of the existing problems of inconvenient treatment of odors emitted by sewage and environmental pollution when purifying sewage, the following scheme is proposed. , which includes a shell, the top of the shell is fixedly installed with a filter shell, agitation shell and a suction shell in sequence from left to right, and the filter shell, the stirring shell and the suction shell are respectively rotatably installed with a first transmission rod, a second Two transmission rods and a third transmission rod, the outer side of the first transmission rod is fixedly installed with a paddle, the filter housing is fixedly installed with a filter screen located under the paddle, and the outer side of the first transmission rod is fixedly sleeved with a first cone The invention can treat the odor in the sewage, avoid polluting the production environment, and at the same time can speed up the filtering speed of the filter screen, the structure is simple, and the use is convenient.

Figure 202011156727

Description

Chemical industry sewage purification device for chemical plant
Technical Field
The invention relates to the technical field of sewage purification, in particular to a chemical sewage purification device for a chemical plant.
Background
Sewage purification: in order to achieve the process of purifying sewage which is discharged into a certain water body or reused, the sewage treatment is widely applied to various fields of buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and the sewage treatment also increasingly enters the daily life of common people.
In the prior art, when sewage is purified, odor emitted by sewage is not convenient to treat, and the environment is polluted, so that a chemical sewage purification device for a chemical plant is provided for solving the problems.
Disclosure of Invention
The invention aims to solve the defects that odor emitted by sewage is inconvenient to treat and pollutes the environment when the sewage is purified, and provides a chemical sewage purification device for a chemical plant.
In order to achieve the purpose, the invention adopts the following technical scheme:
a chemical sewage purification device for a chemical plant comprises an outer shell, wherein a filter shell, a stirring shell and an air pumping shell are sequentially and fixedly arranged at the top of the outer shell from left to right, a first transmission rod, a second transmission rod and a third transmission rod are respectively rotatably arranged on the filter shell, the outer side of the first transmission rod is fixedly provided with a paddle, a filter screen positioned below the paddle is fixedly arranged in the filter shell, the outer side of the first transmission rod is fixedly sleeved with a first bevel gear and a second bevel gear, the first bevel gear and the second bevel gear are respectively meshed with a third bevel gear and a fourth bevel gear, the bottoms of the third bevel gear and the fourth bevel gear are respectively and fixedly connected with the tops of the second transmission rod and the third transmission rod, the outer side of the third transmission rod is fixedly provided with a fan blade, the fan blade is positioned in the air pumping shell, one side of the air pumping shell is fixedly communicated with a purification shell, one side of purifying the shell is equipped with the gas vent, is equipped with high ozone UV ultraviolet lamp and active carbon filter layer in the purifying shell, the top of shell is equipped with the air inlet, air inlet and the fixed intercommunication of shell of bleeding, the one end fixed mounting of first transfer line has first connecting rod, and the one end of first connecting rod is rotated and is installed the second connecting rod, and the top of second connecting rod is rotated and is installed the connecting plate, and the connecting plate is located the top of filtering the shell, the bottom fixed mounting of connecting plate has two hitting poles, and first transfer line is located between two hitting poles, and the filter screen is located the below of hitting pole.
Preferably, the top of the filtering shell is provided with a water inlet, and the top of the outer shell is provided with an inlet communicated with the filtering shell.
Preferably, the bottom fixedly connected with drain pipe of stirring shell is equipped with the solenoid valve on the drain pipe, and the bottom of drain pipe extends to in the shell.
Preferably, the top of the stirring shell is provided with an inlet, and the outer side of the second transmission rod is fixedly provided with a plurality of stirring rods.
Preferably, a liquid discharge pipe is arranged at the bottom of one side of the shell, and a valve is arranged on the liquid discharge pipe.
Preferably, the top of the stirring shell and the top of the air exhaust shell are respectively and fixedly provided with a second bearing and a third bearing, and inner rings of the second bearing and the third bearing are respectively and fixedly connected with the outer sides of the second transmission rod and the third transmission rod.
Preferably, one side of the filter shell is fixedly provided with a first bearing, and an inner ring of the first bearing is fixedly connected with the outer side of the first transmission rod.
Preferably, two vertical holes are formed in the top of the filter shell, and the outer sides of the two beating rods are respectively in contact with the inner walls of the two vertical holes.
Compared with the prior art, the invention has the advantages that:
(1) when the scheme is used, a sewage treating agent is added into the stirring shell from the adding port, then clean water is added, the high-ozone UV ultraviolet lamp is opened, sewage enters the filtering shell from the water inlet, the sewage can impact the paddle, the paddle drives the first transmission rod to rotate, the sewage enters the shell from the inlet after being filtered by the filter screen, the first connecting rod, the first conical gear and the second conical gear are driven to rotate by the first transmission rod, the third conical gear and the fourth conical gear drive the third conical gear and the fourth conical gear to rotate, the second transmission rod drives the stirring rod to rotate to stir the sewage treating agent, the electromagnetic valve is opened, and a sewage treating agent solution is discharged into the shell from the liquid outlet pipe and is contacted with the sewage to purify the sewage;
(2) according to the scheme, the fan blades are driven to rotate through the third transmission rod, the fan blades blow upwards, so that odor in the shell enters the air exhaust shell through the air inlet and then enters the purification shell, air exhaust is photolyzed through the high-ozone UV ultraviolet lamp, gas is adsorbed through the activated carbon adsorption layer, and the treated gas is discharged from the air outlet;
(3) according to the scheme, the first connecting rod drives the second connecting rod to move, the second connecting rod drives the connecting plate to reciprocate up and down, the connecting plate drives the striking rod to reciprocate up and down, and the filter screen is struck by the striking rod, so that the filtering speed of the filter screen is increased;
(4) the invention can treat the odor in the sewage, avoid polluting the production environment, and simultaneously can accelerate the filtering speed of the filter screen, and has simple structure and convenient use.
Drawings
FIG. 1 is a schematic structural diagram of a chemical wastewater purification apparatus for a chemical plant according to the present invention;
FIG. 2 is a schematic structural diagram of part A of a chemical wastewater purification apparatus for a chemical plant according to the present invention;
FIG. 3 is a schematic side view of a part of a chemical wastewater purification apparatus for a chemical plant according to the present invention;
FIG. 4 is a schematic top view of a stirring shell and a first transmission rod of a chemical wastewater purification device for a chemical plant according to the present invention;
fig. 5 is a schematic three-dimensional structure diagram of an air pumping shell of a chemical sewage purification device for a chemical plant according to the present invention.
In the figure: the device comprises a shell 1, a filter shell 2, a stirring shell 3, an air pumping shell 4, a purifying shell 5, a second transmission rod 6, a third transmission rod 7, a first transmission rod 8, a paddle 9, a water inlet 10, a filter screen 11, a high-ozone UV ultraviolet lamp 12, an activated carbon filter layer 13, fan blades 14, a first connecting rod 15, a second connecting rod 16, a connecting plate 17, a beating rod 18, a first bevel gear 19, a third bevel gear 20, a second bevel gear 21, a fourth bevel gear 22, a liquid outlet pipe 23, a liquid inlet 24, a liquid inlet 25, a gas outlet 26, a stirring rod 27 and a liquid outlet pipe 28.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments, but not all embodiments.
Referring to fig. 1-5, a chemical wastewater purification device for a chemical plant comprises a housing 1, a filter shell 2, a stirring shell 3 and an air exhaust shell 4 are fixedly installed on the top of the housing 1 from left to right in sequence, a first transmission rod 8, a second transmission rod 6 and a third transmission rod 7 are respectively installed on the filter shell 2, the stirring shell 3 and the air exhaust shell 4 in a rotating manner, a paddle 9 is fixedly installed on the outer side of the first transmission rod 8, a filter screen 11 positioned below the paddle 9 is fixedly installed in the filter shell 2, a first bevel gear 19 and a second bevel gear 21 are fixedly sleeved on the outer side of the first transmission rod 8, a third bevel gear 20 and a fourth bevel gear 22 are respectively engaged on the first bevel gear 19 and the second bevel gear 21, the bottoms of the third bevel gear 20 and the fourth bevel gear 22 are respectively fixedly connected with the tops of the second transmission rod 6 and the third transmission rod 7, and a fan blade 14 is fixedly installed on the outer side of the third transmission rod, flabellum 14 is located shell 4 of bleeding, the fixed intercommunication in one side of shell 4 of bleeding has purification shell 5, one side of purification shell 5 is equipped with gas vent 26, be equipped with high ozone UV ultraviolet lamp 12 and active carbon filter layer 13 in the purification shell 5, the top of shell 1 is equipped with air inlet 24, air inlet 24 and the fixed intercommunication of shell 4 of bleeding, the one end fixed mounting of first transfer link 8 has first connecting rod 15, the one end of first connecting rod 15 is rotated and is installed second connecting rod 16, the top of second connecting rod 16 is rotated and is installed connecting plate 17, connecting plate 17 is located the top of filtering shell 2, the bottom fixed mounting of connecting plate 17 has two hitting poles 18, first transfer link 8 is located between two hitting poles 18, filter screen 11 is located the below of hitting pole 18.
In this embodiment, the top of the filtering shell 2 is provided with a water inlet 10, the top of the outer shell 1 is provided with an inlet communicated with the filtering shell 2, and the water inlet 10 is used for sewage to enter.
In this embodiment, the bottom fixedly connected with drain pipe 23 of stirring shell 3 is equipped with the solenoid valve on the drain pipe 23, and in the bottom of drain pipe 23 extended to shell 1, drain pipe 23 was used for adding sewage treatment agent.
In this embodiment, the top of the stirring shell 3 is provided with an inlet 25, the outer side of the second transmission rod 6 is fixedly provided with a plurality of stirring rods 27, and the stirring rods 27 are used for stirring the sewage treatment agent.
In this embodiment, a drain pipe 28 is disposed at the bottom of one side of the housing 1, a valve is disposed on the drain pipe 28, and the drain pipe 28 is used for discharging the treated sewage.
In this embodiment, the top of the stirring shell 3 and the top of the air exhaust shell 4 are respectively and fixedly provided with a second bearing and a third bearing, and inner rings of the second bearing and the third bearing are respectively and fixedly connected with the outer sides of the second transmission rod 6 and the third transmission rod 7.
In this embodiment, a first bearing is fixedly installed on one side of the filter housing 2, and an inner ring of the first bearing is fixedly connected with the outer side of the first transmission rod 8.
In this embodiment, two vertical holes are formed in the top of the filter housing 2, and the outer sides of the two striking rods 18 are respectively in contact with the inner walls of the two vertical holes.
In the embodiment, when the device is used, a sewage treatment agent is added into the stirring shell 3 from the adding port 25, then clean water is added, the high-ozone UV ultraviolet lamp 12 is turned on, sewage enters the filtering shell 2 from the water inlet 10, the sewage impacts the paddle 9, the paddle 9 drives the first transmission rod 8 to rotate, the sewage is filtered by the filter screen 11 and enters the shell 1 from the inlet, the first transmission rod 8 drives the first connecting rod 15, the first bevel gear 19 and the second bevel gear 21 to rotate, the first bevel gear 19 and the second bevel gear 21 drive the third bevel gear 20 and the fourth bevel gear 22 to rotate, the third bevel gear 20 and the fourth bevel gear 22 drive the second transmission rod 6 and the third transmission rod 7 to rotate, the second transmission rod 6 drives the stirring rod 27 to rotate to stir the sewage treatment agent, the electromagnetic valve is turned on, and sewage treatment agent solution is discharged into the shell 1 from the liquid outlet pipe 23, with sewage contact, purify sewage, drive flabellum 14 through third transfer line 7 and rotate, flabellum 14 is bloied upwards, and then make the foul smell in the shell 1 pass through air inlet 24 and get into in the shell of taking out air 4, then get into and purify shell 5, carry out the photodissociation to the bleed through high ozone UV ultraviolet lamp 12, adsorb the processing through activated carbon adsorption layer 13 to gas, gas after the processing is discharged by gas vent 26, drive the motion of second connecting rod 16 through first connecting rod 15, second connecting rod 16 drives connecting plate 17 reciprocating motion from top to bottom, connecting plate 17 drives and hits beating rod 18 reciprocating motion from top to bottom, hit filter screen 11 through hitting rod 18 and hit, accelerate filter screen 11's filter speed.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention in the technical scope of the present invention.

Claims (8)

1.一种化工厂用化工污水净化装置，包括外壳(1)，其特征在于，所述外壳(1)的顶部从左至右依次固定安装有过滤壳(2)、搅拌壳(3)和抽气壳(4)，所述过滤壳(2)、搅拌壳(3)和抽气壳(4)上分别转动安装有第一传动杆(8)、第二传动杆(6)和第三传动杆(7)，第一传动杆(8)的外侧固定安装有桨叶(9)，过滤壳(2)内固定安装有位于桨叶(9)下方的滤网(11)，所述第一传动杆(8)的外侧固定套设有第一锥形齿轮(19)和第二锥形齿轮(21)，第一锥形齿轮(19)和第二锥形齿轮(21)上分别啮合有第三锥形齿轮(20)和第四锥形齿轮(22)，第三锥形齿轮(20)和第四锥形齿轮(22)的底部分别与第二传动杆(6)和第三传动杆(7)的顶部固定连接，所述第三传动杆(7)的外侧固定安装有扇叶(14)，扇叶(14)位于抽气壳(4)内，所述抽气壳(4)的一侧固定连通有净化壳(5)，净化壳(5)的一侧设有排气口(26)，净化壳(5)内设有高臭氧UV紫外灯(12)和活性炭过滤层(13)，所述外壳(1)的顶部设有进气口(24)，进气口(24)与抽气壳(4)固定连通，所述第一传动杆(8)的一端固定安装有第一连杆(15)，第一连杆(15)的一端转动安装有第二连杆(16)，第二连杆(16)的顶部转动安装有连接板(17)，连接板(17)位于过滤壳(2)的上方，所述连接板(17)的底部固定安装有两个击打杆(18)，第一传动杆(8)位于两个击打杆(18)之间，滤网(11)位于击打杆(18)的下方。1. A chemical sewage purification device for a chemical plant, comprising an outer shell (1), characterized in that the top of the outer shell (1) is sequentially fixedly installed with a filter shell (2), a stirring shell (3) and a filter shell (2) from left to right. The air extraction shell (4), a first transmission rod (8), a second transmission rod (6) and a third transmission rod (6) and a third transmission rod (8), a second transmission rod (6) and a third transmission rod (8) are respectively rotatably installed on the filter shell (2), the stirring shell (3) and the air extraction shell (4). A transmission rod (7), a paddle (9) is fixedly installed on the outer side of the first transmission rod (8), and a filter screen (11) located under the paddle (9) is fixedly installed in the filter housing (2). A first bevel gear (19) and a second bevel gear (21) are fixedly sleeved on the outer side of a transmission rod (8), and the first bevel gear (19) and the second bevel gear (21) are respectively meshed with each other. There are a third bevel gear (20) and a fourth bevel gear (22), and the bottom of the third bevel gear (20) and the fourth bevel gear (22) are respectively connected with the second transmission rod (6) and the third bevel gear (22). The top of the transmission rod (7) is fixedly connected, the outer side of the third transmission rod (7) is fixedly installed with a fan blade (14), and the fan blade (14) is located in the air extraction shell (4), and the air extraction shell ( One side of 4) is fixedly connected with a purification shell (5), one side of the purification shell (5) is provided with an exhaust port (26), and a high-ozone UV lamp (12) and an activated carbon filter are arranged in the purification shell (5). Layer (13), the top of the casing (1) is provided with an air inlet (24), the air inlet (24) is in fixed communication with the air extraction shell (4), and one end of the first transmission rod (8) is fixed A first connecting rod (15) is installed, one end of the first connecting rod (15) is rotatably installed with a second connecting rod (16), the top of the second connecting rod (16) is rotatably installed with a connecting plate (17), and the connecting plate (17) is located above the filter shell (2), two hitting rods (18) are fixedly installed on the bottom of the connecting plate (17), and the first transmission rod (8) is located between the two hitting rods (18). During this time, the filter screen (11) is located under the hitting rod (18). 2.根据权利要求1所述的一种化工厂用化工污水净化装置，其特征在于，所述过滤壳(2)的顶部设有进水口(10)，外壳(1)的顶部设有与过滤壳(2)相连通的入口。2. The device for purifying chemical sewage in a chemical plant according to claim 1, wherein the top of the filter shell (2) is provided with a water inlet (10), and the top of the shell (1) is provided with a water inlet (10). The inlet that the shell (2) communicates with. 3.根据权利要求1所述的一种化工厂用化工污水净化装置，其特征在于，所述搅拌壳(3)的底部固定连接有出液管(23)，出液管(23)上设有电磁阀，出液管(23)的底端延伸至外壳(1)内。3. A chemical sewage purification device for a chemical plant according to claim 1, characterized in that, a liquid outlet pipe (23) is fixedly connected to the bottom of the stirring shell (3), and the liquid outlet pipe (23) is provided with a liquid outlet pipe (23). There is a solenoid valve, and the bottom end of the liquid outlet pipe (23) extends into the casing (1). 4.根据权利要求1所述的一种化工厂用化工污水净化装置，其特征在于，所述搅拌壳(3)的顶部设有加入口(25)，第二传动杆(6)的外侧固定安装有多个搅拌杆(27)。4. A chemical sewage purification device for a chemical plant according to claim 1, wherein the top of the stirring shell (3) is provided with an inlet (25), and the outer side of the second transmission rod (6) is fixed A number of stirring rods (27) are installed. 5.根据权利要求1所述的一种化工厂用化工污水净化装置，其特征在于，所述外壳(1)的一侧底部设有排液管(28)，排液管(28)上设有阀门。5. A chemical sewage purification device for a chemical plant according to claim 1, characterized in that, a drain pipe (28) is provided at the bottom of one side of the casing (1), and a drain pipe (28) is provided on the drain pipe (28). There are valves. 6.根据权利要求1所述的一种化工厂用化工污水净化装置，其特征在于，所述搅拌壳(3)和抽气壳(4)的顶部分别固定安装有第二轴承和第三轴承，第二轴承和第三轴承的内圈分别与第二传动杆(6)和第三传动杆(7)的外侧固定连接。6. A chemical sewage purification device for a chemical plant according to claim 1, characterized in that, the tops of the stirring shell (3) and the suction shell (4) are respectively fixedly installed with a second bearing and a third bearing , the inner rings of the second bearing and the third bearing are respectively fixedly connected with the outer sides of the second transmission rod (6) and the third transmission rod (7). 7.根据权利要求1所述的一种化工厂用化工污水净化装置，其特征在于，所述过滤壳(2)的一侧固定安装有第一轴承，第一轴承的内圈与第一传动杆(8)的外侧固定连接。7. A chemical sewage purification device for a chemical plant according to claim 1, characterized in that, a first bearing is fixedly installed on one side of the filter shell (2), and the inner ring of the first bearing is connected to the first transmission The outer side of the rod (8) is fixedly connected. 8.根据权利要求1所述的一种化工厂用化工污水净化装置，其特征在于，所述过滤壳(2)的顶部开设有两个竖孔，两个击打杆(18)的外侧分别与两个竖孔的内壁相接触。8. A chemical sewage purification device for a chemical plant according to claim 1, wherein the top of the filter shell (2) is provided with two vertical holes, and the outer sides of the two beating rods (18) are respectively In contact with the inner walls of the two vertical holes.
CN202011156727.0A 2020-10-26 2020-10-26 Chemical industry sewage purification device for chemical plant Pending CN112390430A (en)

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CN210786596U (en) * 2019-09-26 2020-06-19 王袁 Coating drying furnace exhaust treatment device
CN111389860A (en) * 2020-03-23 2020-07-10 刘丽华 Waste treatment system of production concrete water-reducing agent reation kettle
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Application publication date: 20210223