CN117046361B - A device for wet dosing of powdered materials and water treatment method thereof - Google Patents

Abstract

The invention relates to the technical field of sewage advanced treatment, and discloses a device for feeding powder materials by a wet method and a water treatment method thereof. Meanwhile, a stirrer and a submersible sewage pump are arranged in the liquid storage device, and the slurry is subjected to intermittent aeration treatment and stirring through the existing process; the submersible sewage pump is respectively connected with a backflow pipeline, a slurry discharge pipeline and a water adding pipeline, wherein the backflow pipeline can enable slurry to flow back into the liquid storage device, the slurry discharge pipeline can enable the slurry to be added into a water body, and the water adding pipeline can enable the slurry to be transported to the mixing device to be mixed with powder.

Description

A device for wet dosing of powdered materials and water treatment method thereof

Technical Field

The present invention relates to the field of sewage deep treatment, and more specifically, to a device for wet dosing of powdered materials and a water treatment method thereof.

Background technique

As a good adsorbent, activated carbon is widely used in the field of environmental protection worldwide due to its large surface area and good chemical stability. The most common application is in water treatment. Powdered activated carbon is a water treatment process that has the functions of removing color, organic matter, odor, etc. With its application in recent years, the addition of powdered activated carbon has become an important method of concern for water plants. Due to the frequent water pollution incidents in recent years, more and more water plants have realized the importance of water pollution treatment. Therefore, in order to cope with these special situations, many water plants have added powdered activated carbon addition processes.

At present, there are two common dosing processes for powdered activated carbon. One is to prepare powdered activated carbon into a slurry with a concentration of about 10%, and transport it to the dosing point by a metering pump. This method is called wet dosing process; the other is to directly dosing powdered activated carbon into the water ejector by a quantitative feeding device, and the water ejector will add carbon powder to the dosing point. If we consider that carbon powder and water are mixed in the mixing tank, and compare the activated carbon wet dosing process with the activated carbon dry dosing process, it is generally believed that the wet process is easier to ensure accuracy, because carbon powder and water can be stirred in the mixing tank to obtain a very uniform slurry, and the dispersion uniformity in the pipeline is better.

The industry has conducted relevant research and design on devices for wet dosing of powder materials. For example, in the prior art, an activated carbon dosing device and method are provided. The device includes a carbon slurry tank, a jet pump and a gas-liquid separator. After the carbon is transported to the carbon slurry tank, water enters the carbon slurry tank through the jet pump, the gas-liquid separator, and the connecting pipe between the gas-liquid separator and the carbon slurry tank in sequence. The carbon powder input is synchronized with the water inlet. When the water inlet flows through the jet pump, the jet pump inlet inhales air, and the air in the carbon slurry tank is sucked into the jet pump. The carbon slurry tank is The interior is in a state of slight negative pressure. The carbon powder suspended in the air is sucked into the jet pump together with the air and fully mixed with water and then enters the gas-liquid separator. The air is separated from the water in the gas-liquid separator and then discharged. The carbon powder fully mixed with water flows with the water through a carbon slurry tank, a jet pump and a gas-liquid separator. After the carbon is transported to the carbon slurry tank, the water enters the carbon slurry tank through the jet pump, the gas-liquid separator, the connecting pipe between the gas-liquid separator and the carbon slurry tank, and then enters the carbon slurry tank. The invention forms a slight negative pressure in the carbon slurry tank through the suction action of the jet pump, so that the carbon powder entering the jet pump and the water flow collide and mix violently, and the water molecules quickly soak the activated carbon particles to form a stable activated carbon suspension, which solves the problem of the overflow of trace carbon powder extracted from the carbon slurry tank and raising dust.

The prior art discloses an enhanced deep treatment device for wet-dosing powdered activated carbon, which uses two rotating pressing rollers to crush the activated carbon into finer powder, squeezes the powdered activated carbon into a mixing pipe through a rotating feeding auger to mix and stir with water, and finally discharges activated carbon slurry in a fluid state. The fluid activated carbon slurry is input into sewage and can diffuse rapidly in the water and be fully mixed with the sewage, so that the activated carbon can fully absorb the pollutants in the sewage.

However, although the above-mentioned prior art can mix powdered activated carbon and water into carbon slurry, there are at least the following technical problems in the process of preparing the powdered activated carbon slurry: 1. Powdered activated carbon is prone to dust leakage during the process of being transported to the preparation tank by the oblique screw, resulting in excessive powder concentration in the production workshop, posing certain safety hazards; 2. Affected by the moisture absorption of activated carbon, agglomeration is prone to occur during the preparation of the carbon slurry, and the agglomerated activated carbon cannot be broken by stirring; 3. Activated carbon is in a suspended state in the solution and is easily deposited in the pipeline and at the bottom of the preparation tank. Ordinary stirring cannot ensure that the activated carbon can be evenly suspended, resulting in waste of activated carbon deposition; 4. Carbon slurry is a suspension with a high solid content, which is easy to cause blockage of the dosing pipeline and jet pump, resulting in a high failure rate of the jet pump and an increased frequency of maintenance. At the same time, the output flow of the screw pump is small, and multiple jet pumps are required for multiple-point dosing. Therefore, the existing dosing system has high investment cost and high maintenance cost.

Summary of the invention

In order to overcome the technical problems existing in the above-mentioned prior art, the present invention provides a device for wet dosing of powder materials.

Another object of the present invention is to provide a water treatment method for a device for wet dosing of powder materials.

A device for wet dosing of powder materials, comprising a material storage device, a mixing device for preparing high-concentration slurry, and a liquid storage device for making low-concentration slurry, wherein the mixing device is connected to the material storage device, and the liquid storage tank device for making low-concentration slurry is connected to the mixing device;

The material storage device is also connected to the unpacking machine, and includes a vacuum suction device, a dust collector and a powder bin; the powder bin is connected to the unpacking machine through the vacuum suction device, and is used to suck the powder material in the unpacking machine into the powder bin, and the inner cavity at the bottom of the powder bin is conical; the dust collector is arranged on the top of the powder bin, and is used to remove dust discharged from the powder bin;

The mixing device comprises a screw feeder, a wetting mechanism and a crushing and mixing pump; the screw feeder is connected to the discharge port of the storage device and is used to convey powder materials; the wetting mechanism is arranged at the feeding end of the screw feeder and is used to quickly mix the powder with water; the crushing and mixing pump is arranged at the bottom of the wetting mechanism and is used to mix and break up the agglomerated materials coming out of the wetting mechanism into a uniform slurry;

The liquid storage device is provided with a primary preparation chamber, and the primary preparation chamber is provided with a plurality of aeration pipes and a stirring device; the plurality of aeration pipes are connected to the negative pressure device, so that the primary preparation chamber can achieve intermittent aeration; the stirring device is arranged inside the primary preparation chamber, and is used to fully mix the high-concentration slurry with water;

The negative pressure device includes an air compressor, an air tank and a cold dryer; the air compressor is connected to one end of the air tank and is used to compress the air and store it in the air tank; the cold dryer is connected to the other end of the air tank and is used to dry the water vapor in the compressed air.

Preferably, the negative pressure device is connected to the aeration pipe via a through pipe, and high-pressure gas is injected into the aeration pipe to cause the gas to explode in the aeration pipe to form bubbles, thereby achieving aeration.

Preferably, the powdered material comprises powdered activated carbon.

Preferably, the unpacking machine is used to drive mechanical equipment to unpack the powder material, and the vacuum suction device can transport the unpacked powder material to the powder bin through a suction pipe.

Through the design of the above technical solution, the material storage process is: the unpacking machine unpacks the powder material, and then the vacuum suction device transports the unpacked powder material to the powder silo through the change of air pressure.

Furthermore, the crushing and mixing pump is provided with a crushing and cutting turntable, and the crushing and cutting turntable is driven by a motor to rotate and cut.

Preferably, the turntable of the crushing mixing pump is made of stainless steel.

Furthermore, the inner cavity of the wetting mechanism is conical in shape, and is provided with a water inlet, which is sleeved with a water inlet pipe; the water in the water inlet pipe enters the inner cavity of the wetting mechanism from the water inlet in a tangential manner to form a vortex water flow, and the powdered material falls into the vortex water flow in small amounts multiple times to be mixed into a high-concentration slurry, and is quickly mixed with the vortex water flow to prevent the powdered activated carbon from adhering to the inner wall of the wetting mechanism.

Furthermore, a gate valve is provided at the connection between the screw feeder and the storage device, and the gate valve is used to accurately control the conveying equivalent of the powder.

Furthermore, the mixing device is also provided with an isolation valve and an anti-backwater sensor, the isolation valve is used to connect the screw feeder with the wetting mechanism, and the anti-backwater sensor is arranged in the wetting mechanism to control the opening or closing of the isolation valve.

Preferably, the anti-backwater sensor is electrically connected to the isolation valve, and the anti-backwater sensor is used to detect abnormalities in the wetting mechanism, and can control the powder material in the wetting mechanism by controlling the opening or closing of the isolation valve.

Through the above technical solution design, the mixing and configuration process: according to the real-time water volume and the ratio concentration, the screw feeder is accurately controlled to transport an equivalent amount of powder material, the gate valve at the discharge of the powder bin is removed according to the demand, and the powder material falls onto the screw feeder, and the screw feeder transports the powder material to the wetting mechanism. The inner cavity of the wetting mechanism is conical in shape, and the inner cavity of the wetting mechanism is provided with a water inlet, and the water inlet is sleeved with a water inlet pipe. Water enters the wetting mechanism from the water inlet in a tangential manner in the water inlet pipe, thereby forming a vortex water flow in the wetting mechanism. The powder material falls into the vortex water flow in a small amount and multiple times to mix, so as to avoid the powder material adhering to the inner wall of the wetting mechanism. The liquid obtained after mixing enters the crushing and mixing pump. The pump is provided with a crushing and cutting turntable at the solid-liquid inlet. The turntable is made of 316 stainless steel and is connected to the motor main shaft. The speed can reach 1500RPM. All clumped powder materials are thoroughly broken up through the quick cutting function, and then mixed with water and enter the preparation tank to complete the mixing and configuration process.

Furthermore, the aeration pipe has holes obliquely opened at 30-35 degrees downward, the hole size is 2mm-3mm, the hole spacing is 50mm-55mm, and the spacing between the aeration pipes is 300mm-330mm.

Preferably, the aeration pipe is made of PVC pipe, the aeration pipe has a hole opening at an angle of 30 degrees downward, the hole size is 2 mm, the hole spacing is 50 mm, and the spacing between the aeration pipes is 300 mm.

Furthermore, the negative pressure device is also connected to the unpacking machine through a pipeline to supply compressed air to the unpacking machine; the negative pressure device is also connected to the vacuum suction device through a pipeline; the negative pressure device is also connected to the dust collector through a pipeline to provide air pressure and cleaning pulse air source for the dust collector; the negative pressure device is also connected to the bottom of the inner cavity of the powder silo through a pipeline to provide an air source for the powder silo.

Furthermore, the liquid storage device is provided with a secondary preparation chamber, which includes a stirring device and a submersible sewage pump. The stirring device is arranged inside the secondary preparation chamber to improve the uniformity of the slurry, and the submersible sewage pump is arranged inside the secondary preparation chamber to discharge the slurry from the liquid storage device.

Furthermore, the drainage outlet of the submersible sewage pump is detachably connected with a slurry discharge pipe for discharging the slurry into the water; the drainage outlet of the submersible sewage pump is also detachably provided with a reflux pipe connected to the secondary preparation chamber for reflux stirring of the slurry to reduce bottom sedimentation; the drainage outlet of the submersible sewage pump is also detachably provided with a water adding pipe connected to the wetting mechanism and the crushing and mixing pump respectively for increasing the concentration of the prepared slurry.

Through the design of the above technical scheme, the reflux process: the submersible sewage pump is equipped with a frequency converter, which can adjust the flow rate by frequency conversion. The outlet of the submersible sewage pump is detachably connected with a reflux pipe, and the reflux pipe is provided with an electric valve. The reflux pipe leads to the bottom of the secondary cavity. The submersible sewage pump can make the slurry return to the secondary cavity through the reflux pipe, which can effectively reduce the deposition of the slurry at the bottom of the secondary cavity; the outlet of the submersible sewage pump is also provided with a slurry discharge pipe, and the submersible sewage pump can quantitatively add the slurry into the water body through the slurry discharge pipe.

A water treatment method using the device for wet dosing of powder materials comprises the following steps:

S1: The vacuum suction device transports the powder material from the bagging machine to the powder silo;

S2: Pre-wetting the powder material; according to the demand, the gate valve at the discharge of the powder silo is removed, and the powder material falls onto the screw feeder. The screw feeder transports the powder material to the wetting mechanism. The wetting mechanism is provided with a water inlet pipe, and the water inlet pipe enters the wetting mechanism through water injection, thereby forming a vortex water flow in the wetting mechanism. According to the demand, the isolation valve is opened to allow the powder material to fall into the vortex water flow of the wetting mechanism for mixing and pre-wetting;

S3: The pre-wetted slurry is transported to a crushing and mixing pump, which cuts and breaks up the slurry and water to form a uniform slurry of required concentration;

S4: The slurry in the crushing and mixing pump is transported to the primary preparation chamber, where the primary preparation chamber stirs and aerates the slurry;

S5: The slurry treated in the primary preparation chamber is transported to the secondary preparation chamber, and the submersible sewage pump in the secondary preparation chamber quantitatively transports the slurry back to the secondary preparation chamber through the reflux pipe; when necessary, the submersible sewage pump can transport the slurry into the water through the slurry discharge pipe; when necessary, the submersible sewage pump can transport the slurry back to the wetting mechanism or/and the crushing and mixing pump through the water supply pipe.

Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

The inner cavity of the wetting mechanism can make the water form a vortex fluid. When the powder material falls into the wetting mechanism, it can be quickly mixed with water to form a high-concentration slurry, and then enter the crushing and mixing pump to mix with water; after pre-wetting to form a high-concentration slurry, the gap between the powder particles can be effectively reduced, so that the slurry is easier to dissolve and mix in water, avoiding the aggregation of powder particles and the formation of clots, thereby achieving a more uniform configuration of the slurry, and finally mixing with water to enter the preparation tank. At the same time, a first-level mixer and a dispersed aeration device are arranged in the liquid storage device, and the compressed air of the existing process is used to intermittently make the slurry generate bubbles for aeration treatment, thereby solving the sedimentation problem at the bottom of the liquid storage device and ensuring the uniformity of the slurry; a submersible sewage pump is arranged in the secondary cavity of the preparation tank, and the submersible sewage pump is connected to a reflux pipe, which leads to the bottom of the secondary cavity. The submersible sewage pump can make the slurry return to the secondary cavity through the reflux pipe, which can effectively reduce the deposition of the slurry at the bottom of the secondary cavity; the outlet of the submersible sewage pump is also provided with a slurry discharge pipe, and the submersible sewage pump can quantitatively add the slurry to the water body through the slurry discharge pipe.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a device for wet dosing of powder materials;

Among them, 1. material storage device; 101. unpacking machine; 102. vacuum suction device; 103. dust collector; 104. powder silo; 2. mixing device; 201. screw feeder; 202. wetting mechanism; 203. crushing and mixing pump; 204. gate valve; 205. isolation valve; 206. anti-backwater sensor; 3. liquid storage device; 301. primary preparation chamber; 302. secondary preparation chamber; 303. aeration pipe; 304. stirring device; 305. submersible sewage pump; 306. slurry discharge pipe; 307. reflux pipe; 308. water supply pipe; 4. negative pressure device; 401. air compressor; 402. gas storage tank; 403. cold dryer.

Detailed ways

In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

Example 1

As shown in Figure 1, this embodiment discloses a device for wet dosing of powdered materials, including a storage device 1, a mixing device 2 and a liquid storage device 3. The storage device 1 transports powdered activated carbon to the mixing device 2, the mixing device 2 pre-wets the powdered activated carbon to form a high-concentration carbon slurry, and then mixes the high-concentration carbon slurry with water and stirs it to form a carbon slurry of a desired concentration, and finally enters the liquid storage device 3 for storage. When needed, the carbon slurry is transported from the liquid storage device 3 to a water body.

The material storage device 1 includes a packing unpacker 101, a vacuum suction device 102, a dust collector 103 and a powder bin 104. The suction port of the vacuum suction device 102 is connected to the packing unpacker 101 through a suction pipe, the discharge port of the vacuum suction device 102 is connected to the powder bin 104, and the dust collector 103 is arranged on the top of the powder bin 104 to remove dust in the powder bin 104.

In the implementation process of this embodiment, the storage process: the unpacking machine 101 unpacks the powdered activated carbon, then opens the vacuum suction device 102 to generate sufficient air pressure, and the suction port of the vacuum suction device 102 transfers the activated carbon powder to the powder bin 104 through the suction pipe to complete the storage process. The storage device 1 can effectively reduce the leakage of activated carbon powder, avoid affecting the accuracy and stability of preparing carbon slurry, and cause a decrease in production quality.

Example 2

As shown in Figure 1, this embodiment discloses a device for wet dosing of powdered materials, including a storage device 1, a mixing device 2 and a liquid storage device 3. The storage device 1 transports powdered activated carbon to the mixing device 2, the mixing device 2 pre-wets the powdered activated carbon to form a high-concentration carbon slurry, and then mixes the high-concentration carbon slurry with water and stirs it to form a carbon slurry of a desired concentration, and finally enters the liquid storage device 3 for storage. When needed, the carbon slurry is transported from the liquid storage device 3 to a water body.

The mixing device 2 includes a screw feeder 201, a wetting mechanism 202 and a crushing and mixing pump 203. A gate valve 204 is provided at the discharge of the screw feeder 201 and the powder bin 104. The wetting mechanism 202 is provided at the feeding end of the screw feeder 201 for quickly mixing the powder with water. The crushing and mixing pump 203 is provided at the bottom end of the wetting mechanism 202 for mixing and breaking up the agglomerated materials coming out of the wetting mechanism 202 into a high-concentration carbon slurry.

In the implementation process of this embodiment, the mixing configuration process: according to the real-time water volume and the ratio concentration, the screw feeder 201 is accurately controlled to transport an equivalent amount of powdered activated carbon, the gate valve 204 at the discharge of the powder bin 104 is removed, and the powdered activated carbon falls onto the screw feeder 201, and the screw feeder 201 transports the powdered activated carbon to the wetting mechanism 202. The wetting mechanism 202 is provided with a water inlet pipe, and the water inlet pipe enters the wetting mechanism 202 by injecting water, thereby forming a vortex fluid in the wetting mechanism 202, and the powdered activated carbon can quickly mix with water when falling into the inner cavity of the wetting mechanism. The mixed activated carbon will not adhere to the inner cavity wall of the wetting mechanism 202, and the mixed liquid enters the crushing and mixing pump 203. The crushing and mixing pump 203 is equipped with a crushing and cutting turntable at the solid-liquid inlet. The turntable is made of 316 stainless steel and is connected to the motor main shaft. The speed can reach 1500RPM. The crushing and cutting turntable can quickly cut all the clumped activated carbon to form a high-concentration carbon slurry. Then the high-concentration carbon slurry enters the liquid storage device 3 and mixes with water to complete the mixing configuration process. The mixing device 2 can prevent the powdered activated carbon from agglomerating when it is directly mixed with water.

Example 3

As shown in Figure 1, this embodiment discloses a device for wet dosing of powdered materials, including a storage device 1, a mixing device 2 and a liquid storage device 3. The storage device 1 transports powdered activated carbon to the mixing device 2, the mixing device 2 pre-wets the powdered activated carbon to form a high-concentration carbon slurry, and then mixes the high-concentration carbon slurry with water and stirs it to form a carbon slurry of a desired concentration, and finally enters the liquid storage device 3 for storage. When needed, the carbon slurry is transported from the liquid storage device 3 to a water body.

On the basis of Example 2, during the implementation of this example, the mixing device 2 is further provided with an isolation valve 205 and an anti-backwater sensor 206. The isolation valve 205 is used to connect the screw feeder 201 with the wetting mechanism 202, and the anti-backwater sensor 206 is arranged in the wetting mechanism 202 to control the opening or closing of the isolation valve 205.

When there is a failure in the water supply and the carbon slurry cannot be transported out of the wetting mechanism 202 in time, the anti-backwater protection device will automatically start. At this time, the gate valve 204 and the isolation valve 205 are closed, which can effectively prevent water from entering the feeder.

When the carbon slurry preparation process is completed, the gate valve 204 will be closed, which can effectively prevent water vapor from entering the powder silo 104 and causing the powdered activated carbon inside to absorb moisture.

Example 4

As shown in Figure 1, this embodiment discloses a device for wet dosing of powdered materials, including a storage device 1, a mixing device 2 and a liquid storage device 3. The storage device 1 transports powdered activated carbon to the mixing device 2, the mixing device 2 pre-wets the powdered activated carbon to form a high-concentration carbon slurry, and then mixes the high-concentration carbon slurry with water and stirs it to form a carbon slurry of a desired concentration, and finally enters the liquid storage device 3 for storage. When needed, the carbon slurry is transported from the liquid storage device 3 to a water body.

The liquid storage device 3 is provided with a primary preparation chamber 301, and the primary preparation chamber 301 is provided with a plurality of aeration pipes 303 and a stirring device 304. The dry aeration pipes 303 are connected to the negative pressure device 4 to enable the primary preparation chamber 301 to achieve intermittent aeration. The stirring device 304 is arranged inside the primary preparation chamber 301 to fully mix the high-concentration carbon slurry with water.

The negative pressure device 4 includes an air compressor 401, an air tank 402 and a cold dryer 403. The air compressor 401 is connected to one end of the air tank 402 for compressing air and storing it in the air tank 402. The cold dryer 403 is connected to the other end of the air tank 402 for drying water vapor in the compressed air.

The aeration pipe 303 is made of PVC pipe, and the aeration pipe 303 has a hole opening at an angle of 30 degrees downward, the hole size is 2 mm, the hole spacing is 50 mm, and the spacing between the aeration pipes 303 is 300 mm.

During the implementation of this embodiment, when high-concentration carbon slurry and water enter the first-level preparation chamber 301, the stirring device 304 can stir and mix the high-concentration carbon slurry and water into the required carbon slurry; the negative pressure device 4 is connected to the aeration pipe 303 through a pipeline, and high-pressure gas is injected into the aeration pipe 303, so that the high-pressure gas explodes in the tube holes of the aeration pipe 303 to form bubbles, thereby vigorously stirring the high-concentration carbon slurry and water, improving the uniformity of the carbon slurry in the cavity, and avoiding the deposition of the carbon slurry at the bottom; since the aeration pipe 303 is a PVC pipe with excellent corrosion resistance, the PVC pipe is relatively economical and suitable for large-scale use and low-cost projects.

When the negative pressure device 4 performs compression work, the air compressor 401 compresses the air and stores it in the air tank 402. However, when aeration is required, the air tank 402 is opened and the compressed air is dried by the cold dryer 403, which can effectively prevent water vapor from entering the air tank 402 and affecting the concentration configuration of the carbon slurry.

Example 5

As shown in Figure 1, this embodiment discloses a device for wet dosing of powdered materials, including a storage device 1, a mixing device 2 and a liquid storage device 3. The storage device 1 transports powdered activated carbon to the mixing device 2, the mixing device 2 pre-wets the powdered activated carbon to form a high-concentration carbon slurry, and then mixes the high-concentration carbon slurry with water and stirs it to form a carbon slurry of a desired concentration, and finally enters the liquid storage device 3 for storage. When needed, the carbon slurry is transported from the liquid storage device 3 to a water body.

During the implementation of this embodiment, the negative pressure device 4 is also connected to the unpacking machine 101 through a pipeline, and supplies a compression power source to the pneumatic components of the unpacking machine 101, thereby ensuring the normal operation of the unpacking machine 101; the negative pressure device 4 is also connected to the vacuum absorber 102 through a pipeline, and blows air to the inside of the vacuum absorber 102 to remove dust, thereby ensuring the normal operation of the vacuum absorber 102; the negative pressure device 4 is also connected to the dust collector 103 through a pipeline, and provides air pressure and cleaning pulse air source for the dust collector 103, thereby ensuring the dust removal work of the powder bin 104 by the dust collector 103; the negative pressure device 4 is also connected to the bottom of the inner cavity of the powder bin 104 through a pipeline. When necessary, the carbon powder attached to the inner cavity of the bottom of the powder bin 104 is blown off by blowing air to the bottom of the inner cavity of the powder bin 104, thereby avoiding the accumulation of carbon powder and clogging of the bottom of the inner cavity of the powder bin 104.

Example 6

As shown in Figure 1, this embodiment discloses a device for wet dosing of powdered materials, including a storage device 1, a mixing device 2 and a liquid storage device 3. The storage device 1 transports powdered activated carbon to the mixing device 2, the mixing device 2 pre-wets the powdered activated carbon to form a high-concentration carbon slurry, and then mixes the high-concentration carbon slurry with water and stirs it to form a carbon slurry of a desired concentration, and finally enters the liquid storage device 3 for storage. When needed, the carbon slurry is transported from the liquid storage device 3 to a water body.

During the implementation of this embodiment, the liquid storage device 3 is also provided with a secondary preparation chamber 302, and a plurality of submersible sewage pumps 305 are arranged in the secondary preparation chamber 302 for adding carbon slurry. The submersible sewage pump 305 is equipped with a frequency converter, and the flow rate can be adjusted by frequency conversion. The drainage outlet of the submersible sewage pump 305 can also be removably provided with a reflux pipe 307, and an adjustable electric valve and an electromagnetic flowmeter are arranged in the reflux pipe 307. The carbon slurry is refluxed and stirred through the reflux pipe 307 at the bottom of the secondary preparation chamber 302, which can effectively reduce the deposition of the carbon slurry at the bottom of the secondary preparation chamber 302; the drainage outlet of the submersible sewage pump 305 can also be removably provided with a plurality of slurry discharge pipes 306, and an adjustable electric valve and an electromagnetic flowmeter are arranged in the slurry discharge pipe 306; because the submersible sewage pump 305 has low operating costs, stable operation, saves ground space, has the advantages of high automation and low energy consumption, and is easy to maintain, it can also effectively reduce the risk of personnel activities.

When the liquid storage device 3 needs to add carbon slurry into the water body, the electric valve and electromagnetic flowmeter of the return pipe 307 are closed, the electric valve and electromagnetic flowmeter of the slurry discharge pipe 306 are opened, and the parameters of the electromagnetic flowmeter in the slurry discharge pipe 306 are set. The electromagnetic flowmeter adjusts the opening of the electric valve according to the parameters to ensure that the dosage meets the requirements;

When the liquid storage device 3 does not need to add carbon slurry into the water body, the electric valve and electromagnetic flowmeter of the reflux pipe 307 are opened, the electric valve and electromagnetic flowmeter of the slurry discharge pipe 306 are closed, and the parameters of the electromagnetic flowmeter in the reflux pipe 307 are set. The electromagnetic flowmeter adjusts the opening of the electric valve according to the parameters, so as to flexibly control the reflux rate of the carbon slurry in the secondary preparation chamber 302.

Example 7

As shown in Figure 1, this embodiment discloses a device for wet dosing of powdered materials, including a storage device 1, a mixing device 2 and a liquid storage device 3. The storage device 1 transports powdered activated carbon to the mixing device 2, the mixing device 2 pre-wets the powdered activated carbon to form a high-concentration carbon slurry, and then mixes the high-concentration carbon slurry with water and stirs it to form a carbon slurry of a desired concentration, and finally enters the liquid storage device 3 for storage. When needed, the carbon slurry is transported from the liquid storage device 3 to a water body.

On the basis of Example 5, during the implementation of this embodiment, the drainage outlet of the submersible sewage pump 305 can also be removably provided with a pipeline leading to the wetting mechanism 202 and/or the crushing and mixing pump 203. When the carbon slurry concentration in the liquid storage device 3 is insufficient, the submersible sewage pump 305 transports the carbon slurry to the wetting mechanism 202 and/or the crushing and mixing pump 203 through the pipeline for mixing and stirring to increase the carbon slurry concentration.

A water treatment method for a powder material wet dosing device comprises the following steps:

S1: The vacuum suction device 102 transports the powder material from the unpacking machine 101 to the powder material bin 104;

S2: pre-wetting the powder material; according to the demand, the gate valve 204 at the discharge of the powder bin 104 is removed, and the powdered activated carbon falls onto the screw feeder 201, and the screw feeder 201 transports the powdered activated carbon to the wetting mechanism 202. The wetting mechanism 202 is provided with a water inlet pipe, and the water inlet pipe enters the wetting mechanism 202 by injecting water, thereby forming a vortex water flow in the wetting mechanism 202. According to the demand, the isolation valve 205 is opened to allow the powdered activated carbon to fall into the wetting mechanism 202 and be mixed with the vortex water flow for pre-wetting;

S3: The pre-wetted carbon slurry is transported to the crushing and mixing pump 203, which cuts and breaks up the carbon slurry and water to form a uniform carbon slurry of required concentration;

S4: The carbon slurry in the crushing and mixing pump 203 is transported to the primary preparation chamber 301, and the primary preparation chamber 301 performs stirring and aeration treatment on the carbon slurry;

S5: The treated carbon slurry in the primary preparation chamber 301 is transported to the secondary preparation chamber 302, and the submersible sewage pump 305 in the secondary preparation chamber 302 quantitatively transports the carbon slurry back to the secondary preparation chamber 302 through the reflux pipe 307; when necessary, the submersible sewage pump 305 can transport the carbon slurry into the water through the slurry discharge pipe 306; when necessary, the submersible sewage pump 305 can transport the carbon slurry back to the wetting mechanism 202 or/and the crushing and mixing pump 203 through the water supply pipe 308.

Through the above technical solution design, the mixing and configuration process: according to the real-time water volume and the ratio concentration, the screw feeder is accurately controlled to transport an equivalent amount of powdered activated carbon, the gate valve 204 at the outlet of the screw feeder is removed, and the powdered activated carbon falls into the wetting mechanism 202. The inner cavity of the wetting mechanism 202 is conical in shape, and the inner cavity of the wetting mechanism 202 is provided with a water inlet, and the water inlet is sleeved with a water inlet pipe. Water enters the wetting mechanism 202 from the water inlet in a tangential manner in the water inlet pipe, thereby forming a vortex water flow in the wetting mechanism 202. The powdered material falls into the vortex water flow in small amounts and multiple times to mix, so as to prevent the powdered activated carbon from adhering to the inner wall of the wetting mechanism 202. The liquid obtained after mixing enters the crushing and mixing pump. The pump is provided with a crushing and cutting turntable at the solid-liquid inlet. The turntable is made of 316 stainless steel and is connected to the motor main shaft. The speed can reach 1500RPM. All clumped activated carbons are completely broken up through the quick cutting function, and then mixed with water and enter the preparation tank to complete the mixing and configuration process.

working principle

The unpacking machine 101 unpacks the powder material, the vacuum suction device 102 transports the powder material to the powder bin 104 through the suction pipe, the gate valve 204 at the discharge of the powder bin 104 is removed, and the powder material falls onto the screw feeder 201, and the screw feeder 201 transports the powder material to the wetting mechanism 202, and the wetting mechanism 202 is provided with a water inlet, and the water inlet is connected to the water inlet pipe, and water enters the wetting mechanism from the water inlet in a tangential manner. 202, so that a vortex water flow is formed in the wetting mechanism 202, and the powder material falls into the vortex water flow for mixing and pre-wetting, and the mixed slurry enters the crushing and mixing pump 203. The crushing and mixing pump 203 is provided with a crushing and cutting turntable at the solid-liquid inlet. The crushing and cutting turntable has a fast cutting function to completely break up all the clumped powder materials to form a high-concentration slurry, and then the high-concentration slurry and water enter the primary preparation chamber 301. The stirring device 304 in the primary preparation chamber 301 The high-concentration slurry is stirred and mixed with water to form the required slurry. The aeration pipe 303 is arranged in the cavity of the primary preparation chamber 301. The negative pressure device 4 is connected to the aeration pipe 303 through a pipeline. By injecting high-pressure gas into the aeration pipe 303, the high-pressure gas explodes in the tube hole of the aeration pipe 303 to form bubbles, thereby vigorously stirring the high-concentration slurry and water, and then the slurry of the required concentration enters the secondary preparation chamber 302. A submersible sewage pump 305 is arranged in the secondary preparation chamber 302. When it is necessary to put the slurry into the water, the submersible sewage pump 305 transports the slurry to the slurry discharge pipe 306 and puts it into the water; when it is not necessary to put the slurry into the water, the submersible sewage pump 305 transports the slurry to the return pipe 307 and refluxes it into the secondary preparation chamber 302; when the concentration of the slurry in the secondary preparation chamber 302 is too low, the submersible sewage pump 305 can transport the slurry back to the wetting mechanism 202 and/or the crushing and mixing pump 203 through the water supply pipe 308 to increase the concentration of the slurry.

Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims (4)

1. The device for wet feeding of the powder materials is characterized by comprising a storage device (1), a mixing device (2) for preparing high-concentration powder slurry and a liquid storage device (3) for preparing low-concentration powder slurry; the mixing device (2) is connected with the stock device (1); the liquid storage device (3) for preparing the low-concentration slurry is communicated with the mixing device (2);

The material storage device (1) is also connected with the bale breaker (101), and the material storage device (1) comprises a vacuum aspirator (102), a dust remover (103) and a powder bin (104); the powder bin (104) is connected to the bale breaker (101) through the vacuum aspirator (102) and is used for sucking powder materials in the bale breaker (101) into the powder bin (104); the dust remover (103) is arranged at the top of the powder bin (104) and is used for removing dust discharged by the powder bin (104);

the mixing device (2) comprises a screw feeder (201), a wetting mechanism (202) and a crushing and mixing pump (203);

The spiral feeder (201) is connected to a discharge port of the material storage device (1) and is used for conveying powder materials;

the wetting mechanism (202) is arranged at the feeding end of the spiral feeder (201) and is used for rapidly mixing powder with water;

The crushing and mixing pump (203) is arranged at the bottom end of the wetting mechanism (202) and is used for mixing and scattering the agglomerated materials from the wetting mechanism (202) into uniform slurry;

The liquid storage device (3) is provided with a first-stage preparation cavity (301), and the first-stage preparation cavity (301) is provided with a plurality of aeration pipes (303) and a stirring device (304); the plurality of aeration pipes (303) are connected with the negative pressure device (4) to enable the first-stage preparation cavity (301) to realize interval aeration;

the stirring device (304) is arranged in the first-stage preparation cavity (301) and is used for fully mixing high-concentration slurry with water;

the negative pressure device (4) comprises an air compressor (401), an air storage tank (402) and a cold dryer (403);

the air compressor (401) is communicated with one end of the air storage tank (402) and is used for compressing and storing air in the air storage tank (402); the cold dryer (403) is connected to the other end of the air storage tank (402) and is used for drying water vapor in the compressed air;

The inner cavity of the wetting mechanism (202) is cone-shaped, the inner cavity of the wetting mechanism (202) is provided with a water inlet, and the water inlet is sleeved with a water inlet pipe; the water in the water inlet pipe enters the inner cavity of the wetting mechanism (202) from the water inlet in a tangential mode to form vortex water flow, and powder materials fall into the vortex water flow for a plurality of times in a small amount to be mixed into high-concentration powder slurry;

the powder material comprises powder activated carbon;

The negative pressure device (4) is also communicated with the bale breaker (101) through a pipeline, and compressed air is supplied to the bale breaker (101); the negative pressure device (4) is also communicated with the vacuum absorber (102) through a pipeline; the negative pressure device (4) is also communicated with the dust remover (103) through a pipeline, and provides air pressure and ash cleaning pulse air sources for the dust remover (103); the negative pressure device (4) is also communicated with the bottom of the inner cavity of the powder bin (104) through a pipeline;

a crushing and cutting rotary table is arranged in the crushing and mixing pump (203), and the crushing and cutting rotary table is driven by a motor to perform rotary cutting;

the mixing device (2) is also provided with an isolation valve (205) and an anti-backwater sensor (206); the isolation valve (205) is arranged at the joint of the spiral feeder (201) and the wetting mechanism (202); the backwater prevention sensor (206) is arranged in the wetting mechanism (202) and is used for controlling the opening or closing of the isolation valve (205);

The liquid storage device (3) is further provided with a secondary preparation cavity (302), the secondary preparation cavity (302) comprises a stirring device (304) and a submersible sewage pump (305), and the stirring device (304) is arranged in the secondary preparation cavity (302) and used for improving uniformity of slurry; the submersible sewage pump (305) is arranged in the secondary preparation cavity (302) and is used for discharging slurry out of the liquid storage device (3);

The drainage outlet of the submersible sewage pump (305) is detachably connected with a slurry drainage pipeline (306) for draining slurry into water; the drain outlet of the submersible sewage pump (305) is also detachably provided with a backflow pipeline (307) which is communicated with the secondary preparation cavity (302) and is used for carrying out backflow stirring on slurry so as to reduce deposition at the bottom; the drain outlet of the submersible sewage pump (305) is also detachably provided with a water adding pipeline (308) which is respectively communicated with the wetting mechanism (202) and the crushing and mixing pump (203) and is used for increasing the concentration of the prepared slurry.

2. The device for wet feeding of powder materials according to claim 1, wherein a gate valve (204) is arranged at the joint of the spiral feeder (201) and the storage device (1), and the gate valve (204) is used for precisely controlling the conveying equivalent of powder.

3. The device for wet feeding of powder materials according to claim 1, wherein the aeration pipes (303) are provided with holes at an angle of 30-35 degrees downwards, the size of the holes is 2-3 mm, the arrangement space of the holes is 50-55 mm, and the arrangement space between the aeration pipes (303) is 300-330 mm.

4. A water treatment method using the apparatus for wet feeding of powder materials as claimed in claim 2, comprising the steps of:

S1: the vacuum absorber (102) conveys powder materials from the bale breaker (101) to the powder storage bin (104);

s2: pre-wetting the powder material; removing a gate valve (204) at a discharging position of a powder bin (104) according to requirements, enabling powder materials to fall onto a spiral feeder (201), conveying the powder materials into a wetting mechanism (202) by the spiral feeder (201), arranging a water inlet pipe in the wetting mechanism (202), enabling the water inlet pipe to enter the wetting mechanism (202) through water injection, forming vortex water flow in the wetting mechanism (202), opening an isolation valve (205) according to requirements, and enabling the powder materials to fall into the vortex water flow of the wetting mechanism (202) to be mixed and pre-wetted;

S3: the pre-wetted slurry is conveyed to a crushing and mixing pump (203), and the crushing and mixing pump (203) cuts and breaks up the slurry and water to form slurry with required concentration and uniformity;

s4: conveying the needed slurry in the crushing and mixing pump (203) into a first-stage preparation cavity (301), wherein the first-stage preparation cavity (301) is used for stirring and aerating the needed slurry;

s5: the powder slurry treated in the first-stage preparation cavity (301) is conveyed to the second-stage preparation cavity (302), and a submersible sewage pump (305) in the second-stage preparation cavity (302) quantitatively conveys the powder slurry back into the second-stage preparation cavity (302) through a return pipeline (307); the submersible sewage pump (305) can transport and throw the slurry into water through a slurry discharge pipeline (306); the submersible sewage pump (305) may transport the slurry back into the wetting mechanism (202) or/and the breaking and mixing pump (203) through a water adding pipe (308).