CN112811645A

CN112811645A - Heavy metal-containing sewage treatment device based on chelation reaction and use method thereof

Info

Publication number: CN112811645A
Application number: CN202011527226.9A
Authority: CN
Inventors: 张攀; 张贵红; 荣婕
Original assignee: Li Sheng Hangzhou Technology Co ltd
Current assignee: Li Sheng Hangzhou Technology Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-05-18
Anticipated expiration: 2040-12-22
Also published as: CN112811645B

Abstract

The invention discloses a heavy metal-containing sewage treatment device based on chelation reaction and a using method thereof, and the heavy metal-containing sewage treatment device comprises a precipitation filter box, a heating blower, a centrifugal dryer and a powder collecting box, wherein the heating blower, the centrifugal dryer and the powder collecting box are all positioned on one side of the outside of the precipitation filter box, the centrifugal dryer is positioned on one side of the output end of the heating blower, and the powder collecting box is positioned on one side of the centrifugal dryer, which is far away from the heating blower; the method comprises the following steps: step one, adjusting the pH of sewage; step two, adding a metal chelating agent in a settling chamber, and standing for settling; step three, further filtering by the filter plate to obtain clear water; step four, discharging the precipitate and carrying out centrifugal drying; step five, collecting heavy metal precipitate powder; the invention solves the problems of complex structural design, low treatment efficiency of heavy metal sewage and high cost of heavy metal sewage treatment in the prior art.

Description

Heavy metal-containing sewage treatment device based on chelation reaction and use method thereof

Technical Field

The invention belongs to the technical field of sewage treatment equipment, and particularly relates to a heavy metal-containing sewage treatment device based on a chelation reaction and a using method thereof.

Background

The heavy metal sewage is wastewater containing heavy metal discharged in the industrial production processes of mining and metallurgy, mechanical manufacturing, chemical industry, electronics, instruments and the like. Heavy metal (such as cadmium, nickel, mercury, zinc and the like) wastewater is one of the industrial wastewater which has the most serious environmental pollution and the most serious harm to human beings. With the development of the industrialization process, the production amount of the sewage containing heavy metal ions is larger and larger, the direct discharge not only can pollute the environment such as water source and soil, but also can enter the human body through the food chain, and serious harm is caused to the human health.

The chelation reaction is a chemical reaction that produces a chelate. The ligand capable of forming chelate is called chelating agent, and the heavy metal chelating agent can react with Cu in the wastewater at normal temperature and in a wide pH value range²⁺、Cd²⁺、Hg²⁺、Pb²⁺、Mn²⁺、Ni²⁺、Zn²⁺、Cr³⁺And various heavy metal ions are subjected to chemical reaction, and insoluble flocculent precipitate with low water content and easy filtration removal is rapidly generated in a short time, so that the aim of removing the heavy metal ions from the sewage is fulfilled.

The existing heavy metal sewage treatment device based on the chelation reaction has the disadvantages of complex structural design, low treatment efficiency on heavy metal sewage and increased cost for heavy metal sewage treatment of enterprises.

Disclosure of Invention

The invention aims to provide a heavy metal-containing sewage treatment device based on chelation reaction and a using method thereof, and solves the problems that the heavy metal sewage treatment device based on chelation reaction in the prior art is complex in structural design, low in treatment efficiency of heavy metal sewage and high in cost of heavy metal sewage treatment.

The purpose of the invention can be realized by the following technical scheme:

a heavy metal-containing sewage treatment device based on chelation reaction comprises a precipitation filter box, a heating blower, a centrifugal dryer and a powder collecting box, wherein the heating blower, the centrifugal dryer and the powder collecting box are all positioned on one side of the outside of the precipitation filter box, the centrifugal dryer is positioned on one side of the output end of the heating blower, and the powder collecting box is positioned on one side of the centrifugal dryer away from the heating blower;

the sedimentation filter box comprises a box body, a first clapboard, a second clapboard, a third clapboard, a water inlet funnel, a water retaining cylinder body, a drip hopper, a first water collecting support, a water collecting tank, a second water collecting support, a cleaning pipe, a clear water inlet pipe, a sewage discharge port, a filter plate support, a filter plate and a clear water outlet pipe, wherein the bottom end of the box body is provided with a bottom plate, the inclination angle of the bottom plate is 5 degrees, the first clapboard is positioned at one side inside the box body and is fixedly connected with the inner wall of the box body, the second clapboard is positioned at the other side inside the box body, the second clapboard is fixedly connected with the inner wall of the box body, the third clapboard is positioned at one side of the second clapboard, which is far away from the first clapboard, the third clapboard is respectively fixedly connected with the second clapboard and the inner wall of the box body, the first clapboard, the second clapboard and the third clapboard respectively divide the inside of the box body into a pH adjusting chamber, a settling, the settling chamber is positioned between the first partition plate and the second partition plate, the filter chamber is positioned on one side of the third partition plate, the clean water chamber is positioned on the other side of the third partition plate, the water inlet funnel is positioned in the pH adjusting chamber, the bottom end of the water inlet funnel is fixed on the upper surface of the bottom plate, one end of the water inlet is fixedly communicated with the water inlet funnel, the other end of the water inlet penetrates through the side wall of the box body, the water retaining barrel is positioned above the water inlet funnel, one side of the water retaining barrel is fixedly connected with the first partition plate, the other side of the water retaining barrel is fixedly connected with the inner wall of the box body, the top end of the water inlet funnel is positioned in the water retaining barrel, the center of the top end of the water retaining barrel is provided with the drip hopper, the bottom end of the drip hopper penetrates through the top end of the water retaining barrel, the water collecting tank is positioned above the, the other end of the water collecting tank is provided with a second water collecting support, the second water collecting support is fixedly connected with a second partition plate, the second water collecting support and the second partition plate are provided with water guide through holes, the water guide through holes are matched with the water collecting tank, the bottom end of the settling chamber is provided with two oppositely arranged sewage outlets, one side of the bottom end of the settling chamber, far away from the sewage outlets, is provided with a cleaning pipe, the two ends of the cleaning pipe are sealed, the bottom end of the cleaning pipe is provided with a plurality of uniformly distributed water spray ports, one end of the clean water inlet pipe is fixedly communicated with one end of the cleaning pipe, the other end of the clean water inlet pipe penetrates through the side wall of the box body, the center of the third partition plate is provided with a rectangular groove, the two sides of the rectangular groove are oppositely provided with filter plate supports, the filter plate supports are fixedly connected with the third partition plate, a plurality of filter plates are arranged, the below of filter is equipped with the clear water exit tube of two opposition settings, the one end of clear water exit tube runs through third baffle and clear water room intercommunication, and the other end of clear water exit tube runs through the box lateral wall.

Further, the centrifugal dryer comprises a base, a first barrel body, an air inlet box, bearing seats, a driven belt wheel, a driving belt wheel, a belt, a driving motor, a first rotary cover, a packing auger sleeve, a feed inlet, a conveying packing auger, a conveying motor, a second barrel body, a powder outlet, a second rotary cover, an exhaust pipe, a first net barrel, a second net barrel and an end cover, wherein the first barrel body is fixedly arranged above the base, the air inlet box is fixedly arranged on one side of the first barrel body, the interior of the air inlet box is communicated with the interior of the first barrel body, an air inlet is formed in one side of the air inlet box and fixedly communicated with the output end of a heating blower through an air pipe, the second barrel body is arranged on one side of the base and fixedly communicated with the first barrel body, the powder outlet openings are formed in the upper sides of the second barrel body, the bearing seats are arranged on two sides of the base, and are respectively and fixedly connected with the first barrel body and the second barrel, the first rotary cover and the second rotary cover are respectively positioned inside the first barrel body and the second barrel body, one end of the first rotary cover penetrates through the first barrel body and the bearing seat to be fixedly provided with a driven belt wheel, the first rotary cover is rotatably connected with the bearing seat, one end of the second rotary cover penetrates through the second barrel body and the bearing seat, the second rotary cover is rotatably connected with the bearing seat, one side below the driven belt wheel is provided with a driving motor, the output end of the driving motor is fixedly provided with a driving belt wheel, a belt is arranged between the driving belt wheel and the driven belt wheel, the center of the first rotary cover is provided with an auger sleeve, the first rotary cover is rotatably connected with the auger sleeve, one end of the auger sleeve is fixedly provided with an end cover, the other end of the auger sleeve is fixedly provided with a material conveying motor, a conveying auger is arranged inside the auger sleeve, one end of the conveying auger is rotatably connected with the end cover, and the other end of the conveying, the one end top that the auger sleeve pipe is close to defeated material motor is equipped with the feed inlet, the feed inlet passes through pipeline and drain intercommunication, and the one end below that defeated material motor was kept away from to the auger sleeve pipe is equipped with the discharge gate, and the center of the rotatory lid of second is equipped with the exhaust pipe, and the rotatory lid of second rotates with the exhaust pipe to be connected, and the installation is fixed with first net section of thick bamboo between first rotatory lid and the rotatory lid of second, the inside of first net section of thick bamboo is equipped with the second net section of thick bamboo, the both ends of second net section of thick bamboo respectively with first rotatory lid and the rotatory lid fixed connection of second, the waist shape through-hole that a plurality of evenly distributed was opened to the part that the rotatory lid of second is located between first net section of thick bamboo and the second net section of.

Further, the powder collecting box comprises a collecting box body, a box door, a powder inlet, a collecting cloth bag, an upper groove plate, a lower groove plate, a weighing sensor and a garbage box, wherein a box outlet is formed in one side of the collecting box body, the box door is installed on the box outlet in a matched mode, a powder inlet is formed in one side, away from the box door, of the collecting box body, one end of the powder inlet is communicated with the inside of the collecting box body, the other end of the powder inlet is communicated with the powder outlet, the upper groove plate is arranged above the inside of the collecting box body and fixedly connected with the inner wall of the collecting box body, the upper groove plate is located below the powder inlet, the collecting cloth bag is arranged between the upper groove plate and the powder inlet, one end of the collecting cloth bag is fixedly communicated with the powder inlet, the other end of the collecting cloth bag penetrates through the upper groove plate, the lower groove plate is arranged below the upper groove plate and slidably connected with the inner wall of the collecting box body, the dustbin is respectively with last frid and lower frid sliding connection, and the below center of lower frid installs weighing sensor.

Further, an air outlet is formed in the center of the top end of the box body and communicated with the interior of the settling chamber; two observation windows which are oppositely arranged are installed on one side of the box body, which is far away from the sewage draining exit, and the two observation windows are respectively communicated with the pH adjusting chamber and the settling chamber.

Further, open at first baffle center has the access hole, install the access hole lid on the access hole, the below of access hole lid is equipped with one row of a plurality of evenly distributed's rectangular hole, rectangular hole intercommunication pH surge chamber and drip chamber.

A use method of a heavy metal-containing sewage treatment device based on a chelation reaction specifically comprises the following steps:

firstly, injecting sewage into a pH adjusting chamber of a box body through a water inlet funnel and a water retaining cylinder, simultaneously adding an alkaline agent into a dropping funnel, dropping the alkaline agent into the sewage of the water inlet funnel from the bottom end of the dropping funnel, adjusting the pH value of the sewage to 6.5-8.5, and enabling the sewage after pH adjustment to enter a settling chamber from a rectangular hole in a first partition plate;

step two, the sewage with the adjusted pH flows into a settling chamber from a pH adjusting chamber, the water level in the settling chamber rises, a heavy metal chelating agent is added into the settling chamber, the heavy metal chelating agent and heavy metal ions in the sewage are subjected to a chelating reaction to form a chelate salt precipitate, the chelate salt precipitate is kept stand and precipitated in the settling chamber, the liquid level of the sewage after the precipitation treatment rises above a water collecting tank, and the sewage flows into the water collecting tank and flows into a filtering chamber through a flow guide hole in a second partition plate;

filtering the sewage flowing into the filtering chamber by using a filtering plate, filtering and removing residual chelate salt precipitates in the sewage to obtain clear water, wherein the clear water flows into a clear water chamber through a rectangular groove on a third partition plate, and the clear water in the clear water chamber flows out of the precipitation filtering tank through a clear water outlet pipe;

step four, when the accumulation height of the chelate salt precipitate in the settling chamber exceeds the height of a drain outlet, the drain outlet is opened, the chelate salt precipitate precipitated at the bottom end of the bottom plate enters the interior of the auger sleeve through the pipeline and the feed inlet, the material conveying motor is started to convey the chelate salt precipitate to the interior of the second net cylinder, at the moment, the driving motor is started, the output end of the driving motor drives the driving belt wheel to rotate, the driving belt wheel drives the driven belt wheel to rotate through the belt, the driven belt wheel drives the first rotary cover to rotate, the first rotary cover drives the second rotary cover to rotate through the first net cylinder and the second net cylinder, the heating blower is started at the same time, the output end of the heating blower enables hot air to enter the interior of the first cylinder through the air inlet of the air inlet box, the chelate salt precipitate is rolled and dried into fine heavy metal precipitate powder in the second net cylinder and flows out from the pores of the second net cylinder, then is blown into the second barrel body by hot air and centrifugally sprayed out from the powder outlet under the drive of the hot air;

and fifthly, the powder of the heavy metal precipitate enters the dustbin through the powder inlet and the collecting cloth bag to be collected, when the heavy metal precipitate in the dustbin is fully collected by weighing through the weighing sensor, the powder inlet is closed, the dustbin door is opened, the dustbin in the collecting box body is taken out, the powder inlet is opened again after the dustbin is replaced, and then the dustbin door is closed.

The invention has the beneficial effects that:

according to the invention, the first partition plate, the second partition plate and the third partition plate are arranged to divide the interior of the box body into the pH adjusting chamber, the settling chamber, the filtering chamber and the clear water chamber, and the water inlet funnel and the water retaining cylinder are arranged in the pH adjusting chamber, so that the pH adjustment can be completed when sewage enters the box body, and the sewage treatment efficiency is improved; the water collecting tank is arranged in the settling chamber, so that the chelate salt precipitate can be settled in dynamic water flow, and the process that sewage flows from the pH adjusting chamber to the settling chamber is more stable and the impact on the settling process is reduced by arranging a plurality of uniformly distributed rectangular holes below the first partition plate; by arranging the filter plates in the filter chamber, sewage flowing into the filter chamber can be filtered again, cleaner clear water is ensured to be obtained, and the treated clear water is recycled;

according to the invention, by arranging the heating blower, the centrifugal dryer and the powder collecting box, the chelate salt precipitate precipitated in the precipitation chamber can be dried and refined, and is conveyed to the powder collecting box for collection, so that the solid precipitate can be further treated conveniently;

the invention has simple structure, high sewage treatment efficiency and lower treatment cost, and can treat heavy metal sewage in the flowing process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a heavy metal-containing sewage treatment device based on a chelation reaction according to the present invention;

FIG. 2 is a schematic view showing the internal structure of the sedimentation filter tank of the present invention;

FIG. 3 is a side view of a sediment filtration tank of the present invention;

FIG. 4 is a top view of a sediment filtration tank of the present invention;

FIG. 5 is a front view of the centrifugal dryer of the present invention;

FIG. 6 is a top view of the centrifugal dryer of the present invention;

FIG. 7 is a schematic view of the internal structure of the centrifugal dryer of the present invention;

FIG. 8 is a schematic view showing the internal structure of the powder collecting box of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a sedimentation filter tank; 101. a box body; 1011. a base plate; 102. a first separator; 103. a second separator; 104. a third partition plate; 105. a water inlet; 106. a water inlet funnel; 107. a water retaining cylinder body; 108. a drip hopper; 109. an air outlet; 110. a first water collecting bracket; 111. a water collection tank; 112. a second water collecting bracket; 113. cleaning the tube; 114. clear water enters the pipe; 115. a sewage draining outlet; 116. an observation window; 117. a filter plate holder; 118. a filter plate; 119. a clear water outlet pipe; 120. an access opening cover; 2. heating the blower; 3. a centrifugal dryer; 301. a base; 302. a first barrel body; 303. an air inlet box; 304. an air inlet; 305. a bearing seat; 306. a driven pulley; 307. a driving pulley; 308. a belt; 309. a drive motor; 310. a first rotary cover; 311. a packing auger sleeve; 312. a feed inlet; 313. conveying the auger; 314. a material conveying motor; 315. a second barrel body; 316. a powder outlet; 317. a second rotary cover; 318. an exhaust duct; 319. a first net drum; 320. a second mesh drum; 321. an end cap; 4. a powder collection box; 401. a collecting box body; 402. a box door; 403. a powder inlet; 404. collecting the cloth bag; 405. an upper groove plate; 406. a lower slot plate; 407. a weighing sensor; 408. a garbage can is provided.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the present invention is a heavy metal-containing sewage treatment apparatus based on chelation reaction, including a precipitation filter box 1, a heating blower 2, a centrifugal dryer 3 and a powder collection box 4, wherein the heating blower 2, the centrifugal dryer 3 and the powder collection box 4 are all located at one side of the exterior of the precipitation filter box 1, the centrifugal dryer 3 is located at one side of the output end of the heating blower 2, and the powder collection box 4 is located at one side of the centrifugal dryer 3 away from the heating blower 2;

the sediment filter tank 1 comprises a tank body 101, a first partition plate 102, a second partition plate 103, a third partition plate 104, a water inlet 105, a water inlet funnel 106, a water retaining cylinder 107, a dropping hopper 108, a first water collecting support 110, a water collecting tank 111, a second water collecting support 112, a cleaning pipe 113, a clean water inlet pipe 114, a sewage outlet 115, a filter plate support 117, a filter plate 118 and a clean water outlet pipe 119, wherein a bottom plate 1011 is arranged at the bottom end of the tank body 101, the inclination angle of the bottom plate 1011 is 5 degrees, the first partition plate 102 is arranged on one side inside the tank body 101, the first partition plate 102 is fixedly connected with the inner wall of the tank body 101, the second partition plate 103 is arranged on the other side inside the tank body 101, the second partition plate 103 is fixedly connected with the inner wall of the tank body 101, the third partition plate 104 is arranged on one side of the second partition plate 103 far away from the first partition plate 102, the third partition plate 104 is fixedly connected with the, The third partition plate 104 divides the interior of the box body 101 into a pH adjusting chamber, a settling chamber, a filtering chamber and a clear water chamber respectively, the pH adjusting chamber is positioned between the first partition plate 102 and the inner wall of the box body 101, the settling chamber is positioned between the first partition plate 102 and the second partition plate 103, the filtering chamber is positioned on one side of the third partition plate 104, the clear water chamber is positioned on the other side of the third partition plate 104, the water inlet funnel 106 is positioned in the pH adjusting chamber, the bottom end of the water inlet funnel 106 is fixed on the upper surface of the bottom plate 1011, one end of the water inlet 105 is fixedly communicated with the water inlet funnel 106, the other end of the water inlet 105 penetrates through the side wall of the box body 101, the water retaining cylinder 107 is positioned above the water inlet funnel 106, one side of the water retaining cylinder 107 is fixedly connected with the first partition plate 102, the other side of the water retaining cylinder 107 is fixedly connected with the inner wall of the box body 101, the top, the bottom end of the drip bucket 108 penetrates through the top end of the water retaining cylinder 107, the water collecting tank 111 is positioned above the inner part of the settling chamber, the first water collecting support 110 is installed at one end of the water collecting tank 111, the first water collecting support 110 is fixedly connected with the first partition plate 102, the second water collecting support 112 is installed at the other end of the water collecting tank 111, the second water collecting support 112 is fixedly connected with the second partition plate 103, water guiding through holes are formed in the second water collecting support 112 and the second partition plate 103 and matched with the water collecting tank 111, two opposite sewage outlets 115 are formed in the bottom end of the settling chamber, a cleaning pipe 113 is arranged on one side, away from the sewage outlets 115, of the bottom end of the settling chamber, the two ends of the cleaning pipe 113 are sealed, a plurality of uniformly distributed water spray ports are formed in the bottom end of the cleaning pipe 114, one end of the cleaning water inlet pipe 114 is fixedly communicated with one end of the cleaning pipe 113, and the other end of the cleaning water inlet pipe 114, the center of third baffle 104 is opened there is the rectangular channel, the both sides opposition of rectangular channel is equipped with filter plate support 117, filter plate support 117 and third baffle 104 fixed connection, install a plurality of filter 118 between filter plate support 117 and the third baffle 104, filter 118 and rectangular channel cooperate, and the below of filter 118 is equipped with two clear water exit tubes 119 that opposition set up, the one end of clear water exit tube 119 runs through third baffle 104 and clear water room intercommunication, and the other end of clear water exit tube 119 runs through the box 101 lateral wall.

The centrifugal dryer 3 comprises a base 301, a first barrel 302, an air inlet box 303, a bearing seat 305, a driven pulley 306, a driving pulley 307, a belt 308, a driving motor 309, a first rotary cover 310, a packing auger sleeve 311, a feeding port 312, a conveying packing auger 313, a conveying motor 314, a second barrel 315, a powder outlet 316, a second rotary cover 317, an exhaust pipe 318, a first net cylinder 319, a second net cylinder 320 and an end cover 321, wherein the first barrel 302 is fixedly arranged above the base 301, the air inlet box 303 is fixedly arranged on one side of the first barrel 302, the inside of the air inlet box 303 is communicated with the inside of the first barrel 302, an air inlet 304 is formed on one side of the air inlet 303, the air inlet 304 is fixedly communicated with the output end of the heating blower 2 through an air pipe, the second barrel 315 is arranged on one side of the base 301, the second barrel 315 is fixedly communicated with the first barrel 302, the powder outlet 316 is arranged above the second barrel 315, bearing seats 305 are arranged on two sides of the base 301, the two bearing seats 305 are respectively fixedly connected with a first barrel 302 and a second barrel 315, a first rotating cover 310 and a second rotating cover 317 are respectively positioned inside the first barrel 302 and the second barrel 315, one end of the first rotating cover 310 penetrates through the first barrel 302 and the bearing seats 305 and is fixedly provided with a driven pulley 306, the first rotating cover 310 is rotatably connected with the bearing seats 305, one end of the second rotating cover 317 penetrates through the second barrel 315 and the bearing seats 305, the second rotating cover 317 is rotatably connected with the bearing seats 305, one side below the driven pulley 306 is provided with a driving motor 309, an output end of the driving motor 309 is fixedly provided with a driving pulley 307, a belt 308 is arranged between the driving pulley 307 and the driven pulley 306, the center of the first rotating cover 310 is provided with an auger sleeve 311, the first rotating cover 310 is rotatably connected with the auger sleeve 311, an end cover 321 is fixedly arranged at one end of the auger sleeve 311, a material conveying motor 314 is fixedly arranged at the other end of the auger sleeve 311, a material conveying auger 313 is arranged inside the auger sleeve 311, one end of the material conveying auger 313 is rotatably connected with the end cover 321, the other end of the material conveying auger 313 is fixedly connected with the output end of the material conveying motor 314, a material inlet 312 is arranged above one end of the auger sleeve 311 close to the material conveying motor 314, the material inlet 312 is communicated with a sewage outlet 115 through a pipeline, a material outlet is arranged below one end of the auger sleeve 311 far away from the material conveying motor 314, an exhaust pipe 318 is arranged at the center of the second rotary cover 317, the second rotary cover 317 is rotatably connected with the exhaust pipe 318, a first net barrel 319 is fixedly arranged between the first rotary cover 310 and the second rotary cover 317, a second net barrel 320 is arranged inside the first net barrel 319, two ends of the second net barrel 320 are fixedly connected with the first rotary cover 310 and the second rotary cover 317 respectively, the second rotary cover 317 is provided with a plurality of waist-shaped through holes uniformly distributed at a portion between the first net drum 319 and the second net drum 320, and one end of the exhaust duct 318 is communicated with the inside of the second net drum 320.

The powder collecting box 4 comprises a collecting box body 401, a box door 402, a powder inlet 403, a collecting cloth bag 404, an upper groove plate 405, a lower groove plate 406, a weighing sensor 407 and a garbage box 408, wherein a box outlet is formed in one side of the collecting box body 401, the box door 402 is installed on the box outlet in a matching manner, the powder inlet 403 is formed in one side, away from the box door 402, of the collecting box body 401, one end of the powder inlet 403 is communicated with the inside of the collecting box body 401, the other end of the powder inlet 403 is communicated with the powder outlet 316, the upper groove plate 405 is arranged above the inside of the collecting box body 401, the upper groove plate 405 is fixedly connected with the inner wall of the collecting box body 401, the upper groove plate 405 is positioned below the powder inlet 403, the collecting cloth bag 404 is arranged between the upper groove plate 405 and the powder inlet 403, one end of the collecting cloth bag 404 is fixedly communicated with the powder inlet 403, the other end of the collecting cloth bag 404 penetrates through the upper, the lower trough plate 406 is connected with the inner wall of the collecting box body 401 in a sliding mode, a garbage can 408 is arranged between the upper trough plate 405 and the lower trough plate 406, the garbage can 408 is respectively connected with the upper trough plate 405 and the lower trough plate 406 in a sliding mode, and a weighing sensor 407 is installed in the center of the lower portion of the lower trough plate 406.

An air outlet 109 is formed in the center of the top end of the box body 101, and the air outlet 109 is communicated with the inside of the settling chamber; two observation windows 116 which are oppositely arranged are arranged on one side of the box body 101, which is far away from the sewage draining exit 115, and the two observation windows 116 are respectively communicated with the pH adjusting chamber and the settling chamber.

Open at first baffle 102 center has the access hole, install access hole lid 120 on the access hole, the below of access hole lid 120 is equipped with a row of a plurality of evenly distributed's rectangular hole, rectangular hole intercommunication pH adjustment chamber and settling chamber.

The use method of the heavy metal-containing sewage treatment device based on the chelation reaction specifically comprises the following steps:

firstly, injecting sewage into a pH adjusting chamber of a box body 101 through a water inlet 105 through a water inlet funnel 106 and a water retaining cylinder 107, simultaneously adding an alkaline agent into a dropping funnel 108, dropping the alkaline agent into the sewage of the water inlet funnel 106 from the bottom end of the dropping funnel 108, adjusting the pH value of the sewage to 6.5-8.5, and enabling the sewage after pH adjustment to enter a settling chamber from a rectangular hole on a first partition plate 102;

step two, the sewage with the adjusted pH flows into a settling chamber from a pH adjusting chamber, the water level in the settling chamber rises, a heavy metal chelating agent is added into the settling chamber, the heavy metal chelating agent and heavy metal ions in the sewage are subjected to a chelating reaction to form a chelate salt precipitate, the chelate salt precipitate is kept standing and precipitates in the settling chamber, the liquid level of the sewage after the precipitation treatment rises above a water collecting tank 111, and the sewage flows into the water collecting tank 111 and flows into a filtering chamber through a flow guide hole in a second partition plate 103;

step three, filtering the sewage flowing into the filtering chamber by using a filtering plate 118, filtering and removing the residual chelate salt precipitate in the sewage to obtain clear water, wherein the clear water flows into a clear water chamber through a rectangular groove on a third partition plate 104, and the clear water in the clear water chamber flows out of the precipitation filtering box 1 through a clear water outlet pipe 119;

step four, when the accumulation height of the chelate salt precipitate in the settling chamber exceeds the height of the drain outlet 115, opening the drain outlet 115, allowing the chelate salt precipitate precipitated at the bottom end of the bottom plate 1011 to enter the auger sleeve 311 through the pipeline and the feed inlet 312, starting the material conveying motor 314, conveying the chelate salt precipitate into the second mesh cylinder 320, then opening the driving motor 309, driving the output end of the driving motor 309 to drive the driving pulley 307 to rotate, driving the driven pulley 307 to rotate through the belt 308, driving the first rotating cover 310 to rotate through the driven pulley 306, driving the second rotating cover 317 to rotate through the first mesh cylinder 319 and the second mesh cylinder 320, simultaneously starting the heating blower 2, allowing the output end of the heating blower 2 to allow hot air to enter the first barrel 302 through the air inlet 304 of the air inlet box 303, rolling and drying the chelate salt precipitate into fine heavy metal precipitate powder in the second mesh cylinder 320, flows out of the pores of the second mesh cylinder 320 and the first mesh cylinder 319, is blown into the second barrel body 315 by hot air, and is centrifugally sprayed out from the powder outlet 316 under the driving of the hot air;

and fifthly, the powder of the heavy metal precipitate enters the dustbin 408 through the powder inlet 403 and the collecting cloth bag 404 for collection, when the weighing sensor 407 weighs the heavy metal precipitate in the dustbin 408 and collects the heavy metal precipitate fully, the powder inlet 403 is closed, the door 402 is opened, the dustbin 408 in the collecting box body 401 is taken out, the powder inlet 403 is opened again after a new dustbin 408 is replaced, and then the door 402 is closed.

The working principle of the invention is as follows:

when the heavy metal sewage treatment device based on the chelation reaction is used, firstly, sewage is injected into a pH adjusting chamber of a box body 101 from a water inlet 105 through a water inlet funnel 106 and a water retaining cylinder 107, meanwhile, an alkaline agent is added into a dropping funnel 108, the alkaline agent is dropped into the sewage of the water inlet funnel 106 from the bottom end of the dropping funnel 108, the pH value of the sewage is adjusted to 6.5-8.5, a pH meter can be adopted for pH value measurement and alkaline agent adding amount control, and the sewage after pH adjustment enters a settling chamber from a rectangular hole in a first partition plate 102;

the sewage with the pH adjusted continuously flows into the settling chamber from the pH adjusting chamber, the water level in the settling chamber rises, before the water level in the settling chamber is lower than that of the water collecting tank 111, a heavy metal chelating agent is added into the settling chamber, the heavy metal chelating agent is a xanthate chelating agent or a dithiocarbamate chelating agent, the heavy metal chelating agent and heavy metal ions in the sewage undergo a chelating reaction to form a chelate salt precipitate, the chelate salt precipitate stands still in the settling chamber and is precipitated, the liquid level of the sewage after the precipitation treatment rises to be higher than that of the water collecting tank 111, and the sewage flows into the water collecting tank 111 and flows into the filtering chamber through the flow guide holes in the second partition plate 103;

the sewage flowing into the filtering chamber is filtered by the plurality of filtering plates 118, the residual chelate salt precipitate in the sewage is filtered and removed, clear water is obtained, the clear water flows into the clear water chamber through the rectangular groove on the third partition plate 104, the clear water in the clear water chamber flows out of the precipitation filtering box 1 through the clear water outlet pipe 119, and the treated clear water can be used for industrial production again;

when the accumulation height of the chelate salt precipitate in the settling chamber exceeds the height of the drain outlet 115, the drain outlet 115 is opened, the chelate salt precipitate precipitated at the bottom end of the bottom plate 1011 enters the packing auger sleeve 311 through the pipeline and the feed inlet 312, the material conveying motor 314 is started, the output end of the material conveying motor 314 drives the conveying packing auger 313 to rotate, the conveying packing auger 313 conveys the chelate salt precipitate to the inside of the second mesh cylinder 320, at the moment, the driving motor 309 is opened, the output end of the driving motor 309 drives the driving belt wheel 307 to rotate, the driving belt wheel 307 drives the driven belt wheel 306 to rotate through the belt 308, the driven belt wheel 306 drives the first rotating cover 310 to rotate, the first rotating cover 310 drives the second rotating cover 317 to rotate through the first mesh cylinder 319 and the second mesh cylinder 320, the heating blower 2 is started simultaneously, the output end of the heating blower 2 enters hot air into the first barrel 302 through the air inlet 304 of the air inlet box 303, the chelate salt precipitate is rolled and dried into fine heavy metal precipitate powder in, flows out of the pores of the second mesh cylinder 320 and the first mesh cylinder 319, is blown into the second barrel body 315 by hot air, is centrifugally sprayed out from the powder outlet 316 under the driving of the hot air, and the water vapor in the second mesh cylinder 320 is discharged out of the centrifugal dryer 3 through the exhaust pipe 318;

heavy metal precipitate powder enters the garbage can 408 through the powder inlet 403 and the collecting cloth bag 404 for collection, when the weighing sensor 407 weighs heavy metal precipitates in the garbage can 408 and fully collects the heavy metal precipitates, the powder inlet 403 is closed, the box door 402 is opened, the garbage can 408 in the collecting box body 401 is taken out, the powder inlet 403 is opened again after a new garbage can 408 is replaced, and then the box door 402 is closed.

The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.

Claims

1. The utility model provides a contain heavy metal sewage treatment plant based on chelate reaction which characterized in that: the device comprises a precipitation filter box (1), a heating blower (2), a centrifugal dryer (3) and a powder collecting box (4), wherein the heating blower (2), the centrifugal dryer (3) and the powder collecting box (4) are all located on one side of the outside of the precipitation filter box (1), the centrifugal dryer (3) is located on one side of the output end of the heating blower (2), and the powder collecting box (4) is located on one side, far away from the heating blower (2), of the centrifugal dryer (3);

the sedimentation filter box (1) comprises a box body (101), a first partition plate (102), a second partition plate (103), a third partition plate (104), a water inlet (105), a water inlet funnel (106), a water retaining cylinder body (107), a drip hopper (108), a first water collecting support (110), a water collecting tank (111), a second water collecting support (112), a cleaning pipe (113), a clear water inlet pipe (114), a sewage outlet (115), a filter plate support (117), a filter plate (118) and a clear water outlet pipe (119), wherein a bottom plate (1011) is arranged at the bottom end of the box body (101), the inclination angle of the bottom plate (1011) is 5 degrees, the first partition plate (102) is positioned at one side inside the box body (101), the first partition plate (102) is fixedly connected with the inner wall of the box body (101), the second partition plate (103) is positioned at the other side inside the box body (101), and the second partition plate (103) is fixedly connected with the inner wall, the third clapboard (104) is positioned at one side of the second clapboard (103) far away from the first clapboard (102), the third clapboard (104) is respectively fixedly connected with the second clapboard (103) and the inner wall of the box body (101), the first clapboard (102), the second clapboard (103) and the third clapboard (104) respectively separate the interior of the box body (101) into a pH adjusting chamber, a settling chamber, a filtering chamber and a clear water chamber, the pH adjusting chamber is positioned between the first clapboard (102) and the inner wall of the box body (101), the settling chamber is positioned between the first clapboard (102) and the second clapboard (103), the filtering chamber is positioned at one side of the third clapboard (104), the clear water chamber is positioned at the other side of the third clapboard (104), the water inlet funnel (106) is positioned in the pH adjusting chamber, the bottom end of the water inlet funnel (106) is fixed on the upper surface of the bottom plate (1011), one end of the water inlet (105) is fixedly communicated with the water inlet funnel (106), the other end of water inlet (105) runs through box (101) lateral wall, manger plate barrel (107) are located into water funnel (106) top, one side and first baffle (102) fixed connection of manger plate barrel (107), the opposite side and box (101) inner wall fixed connection of manger plate barrel (107), it is inside that funnel (106) top of intaking is located manger plate barrel (107), drip fill (108) are installed at manger plate barrel (107) top center, drip fill (108) are run through to the bottom of drip fill (108) top, water catch bowl (111) are located the inside top of drip chamber, first water collecting support (110) is installed to water catch bowl (111) one end, first water collecting support (110) and first baffle (102) fixed connection, second water collecting support (112) is installed to the other end of water catch bowl (111), second water collecting support (112) and second baffle (103) fixed connection, a water guide through hole is formed in the second water collecting support (112) and the second partition plate (103), the water guide through hole is matched with the water collecting tank (111), two opposite sewage outlets (115) are formed in the bottom end of the settling chamber, a cleaning pipe (113) is arranged on one side, away from the sewage outlets (115), of the bottom end of the settling chamber, the two ends of the cleaning pipe (113) are sealed, a plurality of uniformly distributed water spray openings are formed in the bottom end of the cleaning pipe (113), one end, facing into the cleaning pipe (114), of the cleaning water is fixedly communicated with one end of the cleaning pipe (113), the other end, facing into the cleaning water, of the cleaning water inlet pipe (114) penetrates through the side wall of the box body (101), a rectangular groove is formed in the center of the third partition plate (104), filter plate supports (117) are oppositely arranged on the two sides of the rectangular groove, the filter plate supports (117) are fixedly connected with the third partition plate (104), and a plurality of filter plates (118, the filter (118) cooperate with the rectangular channel, and the below of filter (118) is equipped with two clear water exit tubes (119) that set up oppositely, the one end of clear water exit tube (119) runs through third baffle (104) and clear water room intercommunication, and the other end of clear water exit tube (119) runs through box (101) lateral wall.

2. The heavy metal-containing sewage treatment device based on the chelation reaction according to claim 1, characterized in that: the centrifugal dryer (3) comprises a base (301), a first barrel body (302), an air inlet box (303), a bearing seat (305), a driven pulley (306), a driving pulley (307), a belt (308), a driving motor (309), a first rotary cover (310), a packing auger sleeve (311), a feed inlet (312), a conveying packing auger (313), a conveying motor (314), a second barrel body (315), a powder outlet (316), a second rotary cover (317), an exhaust pipe (318), a first mesh cylinder (319), a second mesh cylinder (320) and an end cover (321), wherein the first barrel body (302) is fixedly arranged above the base (301), the air inlet box (303) is fixedly arranged on one side of the first barrel body (302), the inside of the air inlet box (303) is communicated with the inside of the first barrel body (302), an air inlet (304) is formed on one side of the air inlet box (303), and the air inlet (304) is fixedly communicated with the output end of the heating blower (2) through an air pipe, a second barrel body (315) is arranged on one side of the base (301), the second barrel body (315) is fixedly communicated with the first barrel body (302), a powder outlet (316) is arranged above the peripheral side of the second barrel body (315), bearing seats (305) are arranged on two sides of the base (301), the two bearing seats (305) are respectively and fixedly connected with the first barrel body (302) and the second barrel body (315), a first rotating cover (310) and a second rotating cover (317) are respectively positioned inside the first barrel body (302) and the second barrel body (315), a driven pulley (306) is fixedly arranged at one end of the first rotating cover (310) through the first barrel body (302) and the bearing seats (305), the first rotating cover (310) is rotatably connected with the bearing seats (305), one end of the second rotating cover (317) is rotatably connected with the second barrel body (315) and the bearing seats (305), and the second rotating cover (317) is rotatably connected with the bearing seats (305), driven pulley (306) below one side is equipped with driving motor (309), the output installation of driving motor (309) is fixed with driving pulley (307), install belt (308) between driving pulley (307) and driven pulley (306), the center of first rotary cover (310) is equipped with auger sleeve (311), first rotary cover (310) rotates with auger sleeve (311) and is connected, the one end installation of auger sleeve (311) is fixed with end cover (321), the other end installation of auger sleeve (311) is fixed with defeated material motor (314), the inside of auger sleeve (311) is equipped with carries auger (313), the one end of carrying auger (313) rotates with end cover (321) and is connected, carry the other end of auger (313) and the output fixed connection of defeated material motor (314), auger sleeve (311) is close to the one end top of defeated material motor (314) and is equipped with feed inlet (312), feed inlet (312) are through pipeline and drain (115) intercommunication, and the one end below that defeated material motor (314) was kept away from in auger sleeve pipe (311) is equipped with the discharge gate, and the center of the rotatory lid of second (317) is equipped with exhaust pipe (318), and the rotatory lid of second (317) rotates with exhaust pipe (318) to be connected, and the installation is fixed with first net section of thick bamboo (319) between first rotatory lid (310) and the rotatory lid of second (317), the inside of first net section of thick bamboo (319) is equipped with second net section of thick bamboo (320), the both ends of second net section of thick bamboo (320) respectively with first rotatory lid (310) and the rotatory lid of second (317) fixed connection, the waist shape through-hole that has a plurality of evenly distributed is opened to the part that the rotatory lid of second (317) is located between first net section of thick bamboo (319) and the second net section of thick bamboo (320), the one end and the inside intercommunication of second net section of thick bamboo (320.

3. The heavy metal-containing sewage treatment device based on the chelation reaction according to claim 1, characterized in that: the powder collecting box (4) comprises a collecting box body (401), a box door (402), a powder inlet (403), a collecting cloth bag (404), an upper groove plate (405), a lower groove plate (406), a weighing sensor (407) and a garbage box (408), wherein a box outlet is formed in one side of the collecting box body (401), the box door (402) is installed on the box outlet in a matched mode, the powder inlet (403) is formed in one side, away from the box door (402), of the collecting box body (401), one end of the powder inlet (403) is communicated with the inside of the collecting box body (401), the other end of the powder inlet (403) is communicated with the powder outlet (316), the upper groove plate (405) is arranged above the inside of the collecting box body (401), the upper groove plate (405) is fixedly connected with the inner wall of the collecting box body (401), the upper groove plate (405) is located below the powder inlet (403), the collecting cloth bag (404) is arranged between the upper groove plate (405) and the powder inlet (, the powder collecting device is characterized in that one end of the collecting cloth bag (404) is fixedly communicated with the powder inlet (403), the other end of the collecting cloth bag (404) penetrates through the upper groove plate (405), the lower groove plate (406) is arranged below the upper groove plate (405), the lower groove plate (406) is in sliding connection with the inner wall of the collecting box body (401), a garbage can (408) is arranged between the upper groove plate (405) and the lower groove plate (406), the garbage can (408) is respectively in sliding connection with the upper groove plate (405) and the lower groove plate (406), and a weighing sensor (407) is installed at the center of the lower part of the lower groove plate (406).

4. The heavy metal-containing sewage treatment device based on the chelation reaction according to claim 1, characterized in that: an air outlet (109) is formed in the center of the top end of the box body (101), and the air outlet (109) is communicated with the inside of the settling chamber; two observation windows (116) which are oppositely arranged are installed on one side, away from the sewage draining outlet (115), of the box body (101), and the two observation windows (116) are respectively communicated with the pH adjusting chamber and the settling chamber.

5. The heavy metal-containing sewage treatment device based on the chelation reaction according to claim 1, characterized in that: the utility model discloses a pH adjusting device, including first baffle (102), first baffle is provided with the access hole in the center, install access hole lid (120) on the access hole, the below of access hole lid (120) is equipped with one row of a plurality of evenly distributed's rectangular hole, rectangular hole intercommunication pH adjusting chamber and drip chamber.

6. The use method of the heavy metal-containing sewage treatment device based on the chelation reaction according to claim 1, characterized in that: the method specifically comprises the following steps:

firstly, injecting sewage into a pH adjusting chamber of a box body (101) through a water inlet (105) and a water inlet funnel (106) and a water retaining cylinder (107), simultaneously adding an alkaline agent into a dropping hopper (108), dropping the alkaline agent into the sewage of the water inlet funnel (106) from the bottom end of the dropping hopper (108), adjusting the pH value of the sewage to 6.5-8.5, and enabling the sewage after pH adjustment to enter a settling chamber from a rectangular hole on a first partition plate (102);

step two, the sewage with the pH adjusted flows into a settling chamber from a pH adjusting chamber, the water level in the settling chamber rises, a heavy metal chelating agent is added into the settling chamber, the heavy metal chelating agent and heavy metal ions in the sewage are subjected to a chelating reaction to form a chelate salt precipitate, the chelate salt precipitate is kept stand and precipitated in the settling chamber, the liquid level of the sewage after the precipitation treatment rises above a water collecting tank (111), and the sewage flows into the water collecting tank (111) and flows into a filtering chamber through a flow guide hole in a second partition plate (103);

step three, filtering the sewage flowing into the filtering chamber by a filtering plate (118), filtering and removing residual chelate salt precipitates in the sewage to obtain clear water, wherein the clear water flows into a clear water chamber through a rectangular groove on a third partition plate (104), and the clear water in the clear water chamber flows out of the precipitation filtering box (1) through a clear water outlet pipe (119);

step four, when the accumulation height of the chelate salt precipitate in the settling chamber exceeds the height of the drain outlet (115), the drain outlet (115) is opened, the chelate salt precipitate precipitated at the bottom end of the bottom plate (1011) enters the auger sleeve (311) through the pipeline and the feed inlet (312), the material conveying motor (314) is started, the chelate salt precipitate is conveyed to the inside of the second mesh cylinder (320), at the moment, the driving motor (309) is opened, the output end of the driving motor (309) drives the driving belt wheel (307) to rotate, the driving belt wheel (307) drives the driven belt wheel (306) to rotate through the belt (308), the driven belt wheel (306) drives the first rotating cover (310) to rotate, the first rotating cover (310) drives the second rotating cover (317) to rotate through the first mesh cylinder (319) and the second mesh cylinder (320), the heating blower (2) is started at the same time, the output end of the heating blower (2) enables hot air to enter the first barrel (302) through the air inlet (304) of the air inlet box (303), the chelated salt precipitate is rolled and dried in the second mesh cylinder (320) to form fine heavy metal precipitate powder, flows out from the pores of the second mesh cylinder (320) and the first mesh cylinder (319), is blown into the second barrel body (315) by hot air, and is centrifugally sprayed out from the powder outlet (316) under the drive of the hot air;

fifthly, the powder of the heavy metal precipitate enters a dustbin (408) through a powder inlet (403) and a collecting cloth bag (404) to be collected, when a weighing sensor (407) weighs the heavy metal precipitate in the dustbin (408) to be fully collected, the powder inlet (403) is closed, a dustbin door (402) is opened, the dustbin (408) in a collecting box body (401) is taken out, the powder inlet (403) is opened again after a new dustbin (408) is replaced, and then the dustbin door (402) is closed.