CN216191332U - Granular alkaline compound adding device - Google Patents

Abstract

The utility model relates to a granular alkaline compound adding device, and belongs to the field of industrial waste acid treatment equipment. A granular alkaline compound adding device comprises a swinging pipe, wherein the swinging pipe is a pipe body, the upper part of the swinging pipe is provided with a feeding port, and the lower part of the swinging pipe is a material guiding part; the support shaft is matched with the swinging pipe and is used for movably supporting the swinging pipe; the feeding pipe is positioned at the feeding port, and the end part of the discharging pipe is provided with a spray head; the spray head is opposite to the inner wall of the swing pipe and used for spraying materials and gas, and the sprayed gas acts on the inner wall of the swing pipe to drive the swing pipe to swing. The compressed air is adopted to spray the granular alkaline materials on the side wall of the swing pipe which can swing flexibly, so that the swing pipe can swing under pressure. The material sprayed in the swing pipe is swung and spread after entering the swing pipe and is uniformly distributed in the mixing space.

Description

Granular alkaline compound adding device

Technical Field

The utility model relates to the field of industrial waste acid treatment equipment, in particular to a treatment device for chemical product production and metallurgical hydrochloric acid pickling waste acid, namely a granular alkaline compound adding device.

Background

With the production of large-scale units, the waste acid amount generated by the continuous pickling production line of cold rolled steel is very large. According to the calculation of a production line with general specifications, the amount of waste acid generated per hour can reach 8 cubic meters.

In order to treat the waste acid and improve the residual value of the waste acid, the conversion of the waste acid into high-purity ferrous chloride is an important method.

In the ferrous chloride purification process, the following steps are included:

1. heating the waste acid to over 80 ℃, and consuming free hydrochloric acid through scrap iron in the dissolving tank;

2. cooling the solution to below 50 ℃, raising the pH value by using ammonia water, and carrying out aeration oxidation to form ferric hydroxide or aluminum hydroxide;

3. adding flocculant and sending to a settling tank to clarify the solution.

In the continuous production, the solution for treating the ferrous chloride is large in volume, and the concentrated ammonia adding amount is large, so that the local pH is very high, and the formed floccule is slowly dissolved. Meanwhile, ammonia water is added in a centralized manner, and the ammonia-containing solution is volatilized into the air to pollute the environment.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

Aiming at the problems of uneven mixing and overhigh local concentration and volatility caused by adding ammonia water to improve the pH value in the prior art, the utility model provides the granular alkaline compound adding device.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A granular alkaline compound adding device comprises a swinging pipe, wherein the swinging pipe is a pipe body, the upper part of the swinging pipe is provided with a feeding port, and the lower part of the swinging pipe is a material guiding part; the support shaft is matched with the swinging pipe and is used for movably supporting the swinging pipe; the feeding pipe is positioned at the feeding port, and the end part of the discharging pipe is provided with a spray head; the spray head is opposite to the inner wall of the swing pipe and used for spraying materials and gas, and the sprayed gas acts on the inner wall of the swing pipe to drive the swing pipe to swing.

In a possible embodiment, the feeding port is a conical port for guiding materials and providing sufficient space for accommodating a feeding pipe; the material guiding part is a vertical cylinder.

In a possible embodiment, the feeding pipe is L-shaped and comprises a vertical upper feeding structure and a spray head which is inclined towards the inner wall of the feeding opening.

In a possible embodiment, the side of the oscillating tube is provided with side lugs with through holes; the supporting shaft is a horizontal shaft and penetrates through the through hole to form movable support for the swinging pipe.

In a possible embodiment, a group of through holes are formed in the side wall of the swing pipe; the support shaft penetrates through the group of through holes to form movable support for the swing pipe.

In a possible embodiment, the track of the through hole is intersected with the central axis of the swing pipe, so that the swing pipe is in a vertical state when the swing pipe is static at normal state, and initial blanking can be accurately fallen into the mixing tank. And in the swing process, the material scattering postures to the two sides are symmetrical and uniform.

In a possible embodiment, when the swing pipe is located at a normal position, the feeding pipe is located in the middle of the feeding port, so that the swing pipe is prevented from swinging to touch the spray head, and the swing posture is prevented from changing a uniform reciprocating state due to impact.

In a possible embodiment, the feeding pipe is pumped by an air pump with constant pressurization, and the swing pipe is ensured to swing uniformly and orderly by providing constant air pressure driving force.

3. Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

compressed dry air or nitrogen is adopted to spray granular alkaline materials on the side wall of the oscillating pipe which can oscillate flexibly, so that the pressure oscillation of the oscillating pipe is realized. The swinging driving force is constant-pressure gas at a fixed position, but when the swinging pipe swings to a far point, the swinging pipe is far away from the spray head, the pressure of the swinging pipe is weakened, the ratio of the swinging pipe to the spray head is increased under the action of restoring force, the swinging pipe is restored to the original position, the spray head is close to the spray head of the swinging pipe again under the action of inertia, the spray head is close to the inner wall of the swinging pipe, the swinging pipe is pushed to the far point again under higher air pressure, and the reciprocating operation is carried out, so that the materials sprayed in the swinging pipe enter the swinging pipe and then swing and spread out, and are uniformly distributed in a mixing space.

The buffer part formed by arranging the plate structure has the following effects: 1) the solution circulation path is prolonged, namely the reaction time of the solution and the particles is prolonged, and the dissolving sufficiency is improved; 2) place the particulate matter in the front portion of plate structure, the plate structure provides the guarantee space for the residence of particulate matter, improves particulate matter and solution interact power, improves the particulate matter promptly and is eroded the dissolving effect by solution.

Adopt crisscross each other, relative perpendicular plate structure that sets up, on the one hand provides certain residence space for the particulate matter, and more importantly makes solution have the effect of delaying the reciprocal oscillation of class in-process, strengthens erosion particle at the oscillation in-process, accelerates the particulate matter to dissolve.

Through such oscillation, the pH value of the solution is integrally more uniform.

If adopt the curved plate, then unify the centre of curvature on mixing space's central line, can well balance the relation between solution reverberation effect and the velocity of flow, be unlikely to make the velocity of flow slow down excessively, and it is better to stay the particulate matter effect. The uniform curvature center is also beneficial to the quick positioning and installation of the plate structure.

Drawings

FIG. 1 is a perspective view of a mixing tank in accordance with example 1;

FIG. 2 is a perspective view of a mixing tank according to example 2;

FIG. 3 is the embodiment 2 gas impact swing feeding device three-dimensional structure diagram.

In the figure:

1. a mixing space; 2. a buffer section; 21. a plate structure;

3. a swing pipe; 31. a barrel; 32. a tapered mouth;

4. a support shaft; 5. a feed pipe; 6. and (4) a spray head.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the embodiment.

Example 1

Referring to fig. 1, a particulate alkaline compound feeding apparatus comprises a mixing space 1 consisting of a mixing tank. Dog teeth on two opposite side walls of the mixing tank are provided with plate structures 21 in a staggered manner, and the plate structures 21 on the two side walls are vertical to each other, so that a certain downstream inclination angle is formed and the flow of the solution is accelerated. In this embodiment, the plate structure 21 is a straight plate, one end of which is integrally formed on the mixing tank, and the other end of which extends over half of the mixing tank, so as to guide the liquid to the other side sufficiently and form a more obvious turbulent flow. The lower edge of the plate structure 21 sealingly engages the bottom surface of the mixing tank to prevent the particles from flowing away from the bottom.

When in use, waste acid discharged from the pickling line is continuously fed into a dissolving tank by heating to 90 ℃, and iron reacts with HCl in the dissolving tank to replace elements with positive potential compared with the iron. And (4) finishing primary impurity removal and HCl content reduction in the dissolving tank, and enabling the solution to flow out of the dissolving tank. The solution flowing out of the dissolving tank is at a temperature above 80 ℃ and the HCl content is less than 5 g/L. The solution then flows into a mixing tank. The openings of the plate structure 21 are staggered to create turbulent flow conditions in the fluid. At this time, the solid alkaline particles are scattered along the length direction of the dissolution tank, fall into the buffer part 2 consisting of a plurality of plate structures 21, are dissolved under the erosion of the introduced hot acid solution, and enter the next process along the dissolution tank.

The spreading of the solid alkaline particles is realized by adopting a gas impact swinging feeding device. Specifically, the gas impact pendulum charging device comprises a pendulum pipe 3 disposed above the mixing tank. The side part of the swing pipe 4 is provided with a through hole. The horizontal support shaft 4 penetrates through the through hole to movably support the swing pipe 3. The lower part of the swing pipe 3 is a cylinder 31 leading to a mixing tank for spreading solid alkaline particles to the mixing tank. The upper part of the swing pipe 3 is provided with a conical opening 32 which is used for receiving and guiding solid alkaline particles. An L-shaped feeding pipe 5 is arranged in the conical opening 32, and a spray head 6 is arranged at the tail end of the feeding pipe 5. The feeding pipe 5 and the conical opening 32 are independent from each other and are supported by an external fixed structure.

During the use, the solid alkaline granule is gone into by pressure equipment such as external air pump with the help of compressed dry air or nitrogen gas pump to the conveying pipe 5 other end, and near shower nozzle 6, conveying pipe 5 moves towards and truns into the level from vertical downwards to spout the inside wall to bell 32, utilize the swing of gas drive swing pipe 3. Specifically, when the nozzle 6 is close to the inner side wall of the tapered opening 32, the pressure of the air jet on the inner side wall of the tapered opening 32 is increased, the swing pipe 3 is further pushed to swing, otherwise, the pressure on the inner side wall of the tapered opening 32 is reduced, the swing pipe 3 swings to a far point and returns by means of gravity, and the swing pipe swings in a reciprocating periodic manner. Because the swinging direction of the bottom end of the swinging pipe 3 is consistent with the trend of the mixing tank, solid alkaline particles can be uniformly scattered in the mixing tank and decomposed in a flowing high-temperature ferrous chloride solution to improve the pH value of the solution.

Example 2

As shown in fig. 2 and 3, the horizontal support shaft 4 passes through the middle of the swing pipe 3 to support the swing pipe 3, while the other basic technical solutions of embodiment 1 remain unchanged. The inclined support is avoided, so that the swinging pipe 3 can not be vertically reset under normal conditions. Since the horizontal support shaft 4 penetrates the swing pipe 3, the horizontal support shaft 4 located inside the swing pipe 3 can directly connect and support the shower head 6. The complexity of an external supporting member is reduced, and the integrity of the equipment is improved.

In the present embodiment, the buffer portion 2 is constituted by a plate structure 21. The plate structure 21 is a curved plate. The camber center of plate structure 21 all is located mixed space 1's axis department, and plate structure 21 is minor arc structure, and the one end tangent line that is closest to the flow direction is the obtuse angle, avoids depositing water in the bent plate. The uniform curvature center is beneficial to the quick positioning and installation of the plate structure.

Example 3

On the basis that the other basic solution of embodiment 1 remains unchanged, the mixing space 1 is a mixing tube. Solid alkaline particles are introduced through the inlet section of the mixing tube. Adopt the body structure can avoid mixing the in-process impurity that dopes.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which shall fall within the scope of the claimed invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (8)

1. A particulate alkaline compound adding apparatus, characterized in that: comprises that

The swinging pipe (3) is a pipe body, the upper part of the swinging pipe is provided with a feeding port, and the lower part of the swinging pipe is a material guiding part;

a support shaft (4) which is matched with the swing pipe (3) and is used for movably supporting the swing pipe (3);

the feeding pipe (5) is positioned at the feeding port, and the end part of the discharging pipe is provided with a spray head (6); the spray head (6) is opposite to the inner wall of the swing pipe (3) and is used for spraying materials and gas, and the sprayed gas acts on the inner wall of the swing pipe (3) to drive the swing pipe (3) to swing.

2. A particulate alkaline compound feeding device as claimed in claim 1, wherein:

the feeding port is a conical port (32) for guiding materials and providing sufficient space for accommodating the feeding pipe (5); the material guiding part is a vertical cylinder (31).

3. A particulate alkaline compound feeding device as claimed in claim 1, wherein:

the feeding pipe (5) is L-shaped and comprises a vertical upper material conveying structure and a nozzle (6) which inclines towards the inner wall of the feeding opening.

4. A particulate alkaline compound feeding device as claimed in claim 1, wherein:

the side part of the swing pipe (3) is provided with a side lug with a through hole; the supporting shaft (4) is a horizontal shaft and penetrates through the through hole to form movable support for the swinging pipe (3).

5. A particulate alkaline compound feeding device as claimed in claim 1, wherein:

a group of through holes are formed in the side wall of the swing pipe (3); the supporting shaft (4) horizontally penetrates through the group of through holes to form movable support for the swinging pipe (3).

6. The apparatus for adding a granular basic compound as set forth in claim 5, wherein:

the track of the through hole is intersected with the central axis of the swing pipe (3).

7. A particulate basic compound adding device according to any one of claims 1 to 6, wherein:

when the swing pipe (3) is located at a normal position, the feeding pipe (5) is located in the middle of the feeding port.

8. The apparatus for adding a granular basic compound as set forth in claim 7, wherein:

the feeding pipe (5) is pumped by an air pump to constantly pressurize.

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