Wet grinding device for activated carbon

Abstract

The utility model discloses a kind of wet grinding device for activated carbon, including feeding hopper, buffer tank, agitator and screw feeding machine;One end of the screw feeding machine is inserted into feeding hopper, the other end of the screw feeding machine and buffer tank are abutted together;The top of the buffer tank is provided with emulsifying machine, and the granular activated carbon in buffer tank is pre-ground, the buffer tank is provided with agitator, and the lower portion of the buffer tank is provided with pipeline and shear pump, and the small granular activated carbon after pre-grinding is ground again.The wet grinding device for activated carbon provided by the utility model can reduce the amount of wet slag and the cost of wet slag delivery, while increasing steam income.

Description

Technical Field

[0001] This utility model relates to a wet grinding device, and more particularly to a wet grinding device for activated carbon. Background Technology

[0002] With increasingly stringent environmental protection requirements, activated carbon is being used more and more in various locations to treat waste gas and wastewater. This often results in granular activated carbon being mixed with solid waste for incineration. Activated carbon is a black, porous solid carbonaceous material produced from coal or carbonaceous materials through crushing, molding, or carbonization and activation of uniform coal particles. Its main component is carbon, with small amounts of oxygen, hydrogen, sulfur, nitrogen, chlorine, and other elements. It has a large specific surface area and extremely strong adsorption capacity. For hazardous waste incineration companies, the volume of granular activated carbon remains almost unchanged after incineration. After incineration, it absorbs water in the wet slag machine, making it heavier than the original activated carbon. Furthermore, granular activated carbon easily clogs the feed pipes of the SMP system, preventing it from being incinerated through the SMP system, and resulting in high landfill costs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a wet grinding device for activated carbon, which can reduce the amount of wet slag generated and the cost of sending wet slag out, while increasing steam revenue.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is to provide a wet grinding device for activated carbon, including a feeding hopper, a buffer tank, a stirrer, and a screw feeder; one end of the screw feeder extends into the feeding hopper, and the other end of the screw feeder abuts against the buffer tank; an emulsifier is provided above the buffer tank to pre-grind the granular activated carbon in the buffer tank; a stirrer is provided in the buffer tank; and a pipe and a shear pump are provided below the buffer tank to further grind the pre-ground small granular activated carbon.

[0005] Furthermore, the contact point between the screw feeder and the buffer tank is provided with a reinforced magnetic adsorption metal block or nail.

[0006] Furthermore, a level gauge is installed on the buffer tank.

[0007] Furthermore, the conveying speed of the screw feeder is 1.5t / h.

[0008] Furthermore, a stator blade and a rotor blade are provided at the inlet of the emulsifier to form a high-shear crushing zone. Below the high-shear crushing zone, a grinding disc is provided, and a three-stage fine grinding zone is formed by gradually reducing the tooth pitch of the grinding disc.

[0009] Furthermore, the particle size of the granular activated carbon at the inlet of the buffer tank is 5-10 mm, and the particle size of the ground activated carbon at the outlet of the buffer tank is <0.5 mm.

[0010] Furthermore, a pneumatic diaphragm pump is also provided. The inlet of the pneumatic diaphragm pump is connected to the ton container via a hose, and the outlet of the pneumatic diaphragm pump is delivered to the buffer tank via a pipeline.

[0011] Compared with the prior art, the present invention has the following advantages: The wet grinding device for activated carbon provided by the present invention mixes waste granular activated carbon with water (or low calorific value wastewater) and then grinds and crushes it. The mixture of ground activated carbon and water enters the solid waste pool and is fed into the incineration line for incineration through a grab bucket. Most of the tiny activated carbon particles are completely burned, thereby reducing the amount of wet slag generated and the cost of sending wet slag out, while increasing steam revenue. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the wet grinding device for activated carbon according to the present invention. Figure 2 This is a schematic diagram of the combined structure of the feeding hopper and the emulsifier of this utility model.

[0013] The diagram is marked as follows: 1. Feeding hopper; 2. Agitator; 3. Emulsifier; 4. Shear pump; 5. Screw feeder; 6. Level gauge; 7. Buffer tank; 8. Pneumatic diaphragm pump. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the wet grinding device for activated carbon according to the present invention. Figure 2 This is a schematic diagram of the combined structure of the feeding hopper and the emulsifier of this utility model.

[0016] Please see Figure 1 and Figure 2 The present invention provides a wet grinding device for activated carbon, comprising a feeding hopper 1, a buffer tank 7, a stirrer 2, and a screw feeder 5; one end of the screw feeder 5 extends into the feeding hopper 1, and the other end of the screw feeder 5 abuts against the buffer tank 7; an emulsifier 3 is provided above the buffer tank 7 to pre-grind the granular activated carbon in the buffer tank 7; a stirrer 2 is provided in the buffer tank 7; and a pipe and a shear pump 4 are provided below the buffer tank 7 to further grind the pre-ground small granular activated carbon.

[0017] The wet grinding device for activated carbon provided by this utility model has a strong magnetic zone formed at the contact point between the screw feeder 5 and the buffer tank 7 by a reinforced magnetic adsorption metal block or nail. Figure 1 As shown in the dashed box, it is used to adsorb iron blocks in activated carbon; the buffer tank 7 is equipped with a level gauge 6 to detect the liquid level of the particles.

[0018] The working principle of this utility model is that the solid-liquid mixed material is input from the feed port. The granular activated carbon in the ton bag is manually fixed on a four-corner frame. The activated carbon falls from the bottom of the ton bag into the feeding hopper 1. The screw feeder 5 conveys it to the buffer tank 7 for grinding at 1.5t / h. Before entering the buffer tank 7, the metal blocks or nails with enhanced magnetic adsorption are used to prevent friction damage to the stirring rotor. After entering the buffer tank 7, it is mixed and emulsified with water (or low calorific value wastewater) for simple stirring. Then it enters the high shear crushing zone of the emulsifier 3. The powdered activated carbon that meets the requirements is conveyed to the incinerator. The activated carbon that does not meet the requirements is returned to the pump for grinding.

[0019] The wet grinding device of this utility model is also equipped with a pneumatic diaphragm pump 8, which is used to pump the wastewater in the ton container containing low calorific value wastewater into the buffer tank 7; optionally, the inlet of the pneumatic diaphragm pump 8 is connected to the ton container through a hose, and the outlet is transported to the buffer tank 7 through a pipeline.

[0020] The grinding process of this invention consists of two parts. The first part involves the emulsifier 3 pre-grinding the granular activated carbon in the buffer tank 7. The second part involves the shear pump 4 further grinding the pre-ground granular activated carbon. Both parts have grinding discs, and the material passes through the grinding rings of the rotary disc and the grinding rings of the stator spacer disc step by step. After mutual grinding between them, the material is finally output from the outlet. Due to the multiple grinding processes between the grinding rings, the material is refined. According to actual usage requirements, the finer the particle size of the granular activated carbon, the better, with a desired particle size of <0.5mm. Preferably, the particle size of the granular activated carbon at the inlet of the buffer tank 7 is 5~10mm, and the particle size of the ground activated carbon at the outlet of the buffer tank 7 is <0.5mm.

[0021] The emulsifier 3 of this utility model is a fine emulsifier. Its working principle is as follows: Under the high-speed rotation of the motor, the material directly enters the high-shear crushing zone from the inlet, rapidly breaking down large clumps, lumps, and other particles in the fluid. Then, it is sucked into the shearing and pulverizing zone. In the very narrow working passage, the rotor blades and stator blades cut at high speed, generating intense friction and grinding. Under the action of mechanical motion and centrifugal force, the pulverized material is pressed back into the fine grinding zone for further grinding. The fine grinding zone has three stages; the further outward the stage, the higher the precision of the grinding discs, the smaller the tooth pitch, and the longer the linear velocity, resulting in finer grinding of the material. Simultaneously, the fluid gradually extends radially in a curved path. At each stage, the direction and velocity of the fluid change instantaneously, and it undergoes tens of millions of high-speed shearing, intense friction, extrusion grinding, and particle pulverization per minute. After tens of millions of high-speed shearing and grinding cycles in the three fine grinding zones, the liquid material undergoes molecular chain breakage, particle pulverization, and particle tearing, achieving the effects of dispersion, pulverization, emulsification, homogenization, and refinement.

[0022] Technical parameters of fine emulsifier: 1) It has powerful crushing, dispersing, emulsifying, homogenizing, mixing and conveying functions; 2) It has a quiet design, no noise, good dynamic balance and no vibration; 3) The materials of the rotating and stationary mills can be 304, 306L, 2205 and 2Cr13, and can be nitrided or tungsten carbide treated.

[0023] The wet grinding device for activated carbon provided by this utility model premixes and pre-crushes wastewater and waste activated carbon to ensure uniform feeding; automated feeding reduces the workload of operators and the risks associated with operation; and the customized buffer tank 7 design is adapted to the physicochemical properties of waste activated carbon, offering the following advantages: 1. Reduce the amount of wet residue generated and the cost of transporting it to other areas; 2. Increase steam revenue; 3. Improve combustion efficiency and reduce pollutant emissions.

[0024] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A wet grinding apparatus for activated carbon, characterized in that, It includes a feeding hopper (1), a buffer tank (7), a stirrer (2), and a screw feeder (5); one end of the screw feeder (5) extends into the feeding hopper (1), and the other end of the screw feeder (5) is in contact with the buffer tank (7); an emulsifier (3) is provided above the buffer tank (7) to pre-grind the granular activated carbon in the buffer tank (7); a stirrer (2) is provided in the buffer tank (7); and a pipe and a shear pump (4) are provided below the buffer tank (7) to re-grind the pre-ground small granular activated carbon.

2. The wet grinding apparatus for activated carbon as described in claim 1, characterized in that, The screw feeder (5) and the buffer tank (7) are fitted with reinforced magnetic adsorption metal blocks or nails at their contact points.

3. The wet grinding apparatus for activated carbon as described in claim 1, characterized in that, The buffer tank (7) is equipped with a level gauge (6).

4. The wet grinding apparatus for activated carbon as described in claim 1, characterized in that, The conveying speed of the screw feeder (5) is 1.5t / h.

5. The wet grinding apparatus for activated carbon as described in claim 1, characterized in that, The emulsifier (3) is provided with stator blades and rotor blades at the inlet to form a high-shear crushing zone. A grinding disc is provided below the high-shear crushing zone and a three-stage fine grinding zone is formed by gradually reducing the tooth pitch of the grinding disc.

6. The wet grinding apparatus for activated carbon as described in claim 5, characterized in that, The particle size of the granular activated carbon at the inlet of the buffer tank (7) is 5~10mm, and the particle size of the ground activated carbon at the outlet of the buffer tank (7) is <0.5mm.

7. The wet grinding apparatus for activated carbon as described in claim 1, characterized in that, It is also equipped with a pneumatic diaphragm pump (8), the inlet of which is connected to the ton via a hose, and the outlet of which is delivered to the buffer tank (7) via a pipeline.

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