CN216204453U

CN216204453U - Ferrous chloride solution cooling device

Info

Publication number: CN216204453U
Application number: CN202122494605.9U
Authority: CN
Inventors: 利小民; 李用存; 裴陈新
Original assignee: Magang Hefei Sheet Co ltd
Current assignee: Magang Group Holding Co Ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-04-05
Anticipated expiration: 2031-10-15

Abstract

The utility model relates to a ferrous chloride solution cooling device, and belongs to the field of industrial waste acid treatment equipment. A ferrous chloride solution cooling device comprises a liquid dropping hopper, wherein one side of the upper part of the liquid dropping hopper is communicated with a liquid inlet pipe, and the bottom of the liquid dropping hopper is provided with a liquid discharge pipe; the liquid flying part is arranged in the blanking hopper and is used for dispersing liquid; and the sealing cover is positioned above the liquid dropping hopper, is matched with the liquid dropping hopper in shape, and is used for sealing the upper part of the liquid dropping hopper so as to integrally seal the liquid dropping hopper. The adoption can form the negative pressure liquid falling fill of water curtain and be located the environment evacuation of ferrous chloride solution, reduces boiling mode through the pressure reduction and makes solution rapid evaporation cooling, and needn't utilize heat exchanger to cool down the solution, has avoided the condition of blockking up heat exchanger to take place.

Description

Ferrous chloride solution cooling 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 ferrous chloride solution cooling device.

Background

With the production of large-scale units, cold rolling steel continuous acidThe amount of waste acid generated by the washing production line is very large. Calculated according to a production line with general specifications, the amount of waste acid generated per hour can reach 8m³The total production of waste acid is about 500m per day³。

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.

According to the prior art, the purification process of ferrous chloride comprises the following steps:

1) firstly, reducing the content of hydrochloric acid, heating the waste acid to be more than 80 ℃, and consuming free hydrochloric acid through scrap iron in a dissolving tank to ensure that the content of hydrochloric acid is lower than 5 g/L;

2) reducing the temperature of the solution to below 45 ℃ by a graphite heat exchanger, raising the pH value by ammonia water, and carrying out aeration oxidation to form ferric hydroxide or aluminum hydroxide;

3) adding a flocculating agent to adsorb impurities, and then sending the mixture to a settling tank for precipitation to obtain high-purity ferrous chloride supernatant.

If the pH value of the solution is directly increased under the high-temperature condition in the step 2), colloids such as ferric hydroxide, aluminum hydroxide and the like can be formed, and then the indirect heat exchanger is used for cooling, so that the heat exchanger is seriously scaled, the performance of the heat exchanger is reduced, and even the function of the heat exchanger is lost.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

The utility model provides a ferrous chloride solution cooling device, aiming at the problem that in the prior art, ammonia water is added under a high-temperature condition to increase the pH value, so that the solution forms colloids such as ferric hydroxide, aluminum hydroxide and the like, and equipment is blocked. As hydrochloric acid in the ferrous chloride solution is converted into ammonium chloride and has no volatile corrosion factors, the temperature of the ferrous chloride solution can be reduced by adopting a vacuum evaporation mode.

2. Technical scheme

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

A ferrous chloride solution cooling device comprises a liquid dropping hopper, wherein one side of the upper part of the liquid dropping hopper is communicated with a liquid inlet pipe, and the bottom of the liquid dropping hopper is provided with a liquid discharge pipe; the liquid flying part is arranged inside the liquid dropping hopper and is used for dispersing liquid; and the sealing cover is positioned above the liquid dropping hopper, is matched with the liquid dropping hopper in shape, and is used for sealing the upper part of the liquid dropping hopper so as to integrally seal the liquid dropping hopper.

As a preferred embodiment, the liquid dropping hopper is a conical hopper with an upward opening; the liquid inlet pipe is obliquely guided into the liquid falling hopper so that the liquid spirally falls around the liquid falling hopper; the liquid discharge pipe is arranged at the bottom of the conical hopper.

In a preferred embodiment, the liquid flying part is a baffle plate structure which is protrudingly inserted on the inner side wall of the liquid dropping bucket.

As a preferred embodiment, the sealing cover is provided with a negative pressure hole for externally connecting a negative pressure device to reduce the pressure in the liquid dropping hopper.

As a preferred embodiment, the upper part of the dropping funnel is provided with a liquid separating ring, and the liquid separating ring is positioned below the liquid inlet pipe and arranged around the inner wall of the dropping funnel in a ring manner, and is used for guiding the liquid from the inner edge of the liquid separating ring to form a water curtain.

In a preferred embodiment, the dropping funnel is internally provided with a liquid distribution part which receives the liquid introduced into the liquid inlet pipe, discharges the liquid by utilizing pores formed in the liquid inlet pipe and drops the liquid into the dropping funnel.

As a preferred embodiment, the liquid distribution part is a groove structure connected in the middle of the liquid distribution ring; the aperture is disposed on the bottom surface of the channel structure.

3. Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that: the adoption can form the negative pressure liquid falling fill of water curtain and be located the environment evacuation of ferrous chloride solution, reduces boiling mode through the pressure reduction and makes solution rapid evaporation cooling, and needn't utilize heat exchanger to cool down the solution, has avoided the condition of blockking up heat exchanger to take place. Meanwhile, the concentration of the concentrated ferrous chloride solution formed after evaporation is higher, and according to the actual production, the concentrated ferrous chloride solution can be concentrated by 5-10%, so that the preparation of high-purity ferrous chloride supernatant is facilitated.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of the present invention from two different angles.

In the figure:

1. a liquid falling hopper;

1a, a liquid inlet pipe; 1b, a liquid discharge pipe; 1c, a liquid flying part; 1d, a liquid separating ring;

2. a liquid distribution portion;

2a, pores;

3. sealing the cover;

3a and a negative pressure hole.

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

As shown in fig. 1-2, a ferrous chloride solution cooling device comprises a liquid dropping hopper 1 which is in a conical hopper shape with an upward opening, and one side of the upper edge of the liquid dropping hopper is communicated with a liquid inlet pipe 1 a. The liquid inlet pipe 1a is used for introducing the ferrous chloride solution with higher temperature into the liquid dropping funnel 1. The bottom of the liquid falling hopper 1 is provided with a liquid discharge pipe 1b, and the liquid discharge pipe 1b is positioned at the central tip of the conical hopper structure and is used for concentrated liquid discharge.

The apparatus further includes a flying liquid portion 1 c. The flying liquid part 1c is formed of a multi-stem baffle-like structure. The plurality of baffle-shaped structures are arranged inside the falling liquid hopper 1, are vertical relative to the inner side wall of the falling liquid hopper 1 and are used for dispersedly guiding the falling liquid. The dispersed liquid continuously splashes in the dropping funnel 1 to form water splash. The liquid forms a larger specific surface area in the suspension process, and is easier to evaporate and reduce the temperature in a vacuum environment. It is emphasized that the evaporation and temperature reduction can be accelerated when the ferrous chloride solution whirls down along the inner wall of the dropping funnel 1.

In order to form a reduced pressure or vacuum environment in the dropping funnel 1, in the present embodiment, a cover 3 is covered above the dropping funnel 1. The shape of the sealing cover 3 is matched with that of the liquid dropping bucket 1, and the sealing cover is used for sealing the upper part of the liquid dropping bucket 1, so that the liquid dropping bucket 1 is integrally sealed. The sealing cover 3 is provided with a negative pressure hole for externally connecting a negative pressure device, such as a negative pressure machine, so that the interior of the liquid dropping hopper is decompressed or vacuumized.

In another possible embodiment, in order to improve the dispersion and evaporation heat dissipation effects of the ferrous chloride solution in the dropping funnel 1, a liquid separating ring 1d is further added on the upper part of the dropping funnel 1. The liquid separating ring 1d is positioned below the liquid inlet pipe 1a and is annularly arranged around the inner wall of the liquid dropping hopper. The working principle is as follows: liquid is led into around falling liquid fill 1 inner wall to feed liquor pipe 1a, and when liquid was at the upper surface of dividing liquid ring 1d along its radial inside overflow, ferrous chloride solution will form the cascade from dividing the interior edge flow of liquid ring 1d, further improves liquid evaporation cooling effect.

In another possible embodiment, in order to fully utilize the space of the dropping funnel 1 and further improve the evaporation cooling effect, in this embodiment, a groove structure is additionally arranged in the middle of the liquid separating ring 1 d. The groove structure is arranged along the radial direction, two ends of the groove structure are respectively jointed at two inner edges of the opposite positions of the liquid separating ring 1d, and one end of the groove structure is close to the liquid inlet pipe 1a so as to receive the solution led out from the liquid inlet pipe 1 a. The bottom plate of the tank structure is provided with an aperture 2a so that the solution overflowing the tank structure falls through the aperture 2a to form an intermediate water curtain.

In order to ensure that the ferrous chloride solution in the liquid hopper 1 flows out smoothly under the negative pressure condition, a liquid pump is added at the liquid discharge pipe 1b to resist the backflow of the solution caused by the internal negative pressure.

When the acid pickling line is used, waste acid discharged from the acid pickling line is heated to 90 ℃ and is continuously sent into a dissolving tank, and iron reacts with HCl in the dissolving tank to replace elements with positive potential compared with 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 temperature of the ferrous chloride solution flowing out of the dissolving tank is above 80 ℃, and the HCl content is less than 5 g/L. Then adjusting the pH value of the solution to be more than 3.5 by using an alkaline substance. Then aerating and oxidizing to form ferric hydroxide or aluminum hydroxide colloid, finally introducing the ferrous chloride solution into the negative pressure cooling device, reducing the boiling point of the solution by reducing the pressure, accelerating the volatilization and concentration of the ferrous chloride solution, reducing the waste liquid amount and reducing the temperature. Specifically, before the water curtain is formed, the air pressure in the liquid dropping funnel 1 needs to be reduced, namely, the negative pressure hole 3a is sealed and connected with a negative pressure machine. After the internal pressure of the dropping funnel 1 is reduced to a preset standard, the ferrous chloride solution is introduced into the dropping funnel 1 from the liquid inlet pipe 1 a.

The ferrous chloride solution firstly rotates around the inner wall of the upper part of the falling liquid hopper 1 to fall to the groove structure based on inertia, part of the solution enters the groove structure under the action of blocking and guiding flow on the side wall of the groove and falls into the falling liquid hopper 1 through the hole 2a at the bottom of the groove structure to form a water curtain. The solution falling in the form of water curtain has large specific surface area and large contact area with air, and is easier to evaporate and dissipate heat. The other part of the solution falls from the inner edge of the liquid separating ring 1d and enters the liquid falling hopper 1 to form a circular water curtain, and evaporation and cooling can be accelerated. Solution whereabouts in-process is raised by the separation blade structure on the inside wall, increases the splash density that solution formed through splashing each other to improve solution and air area of contact once more, improve evaporation cooling effect. The solution is dropped to the bottom of the dropping funnel 1 and then discharged from a drain pipe 1b at the bottom.

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

1. The utility model provides a ferrous chloride solution cooling device which characterized in that: comprises that

A liquid dropping hopper (1), wherein one side of the upper part of the liquid dropping hopper is communicated with a liquid inlet pipe (1a), and the bottom of the liquid dropping hopper is provided with a liquid discharge pipe (1 b);

a flying liquid part (1c) which is arranged inside the liquid dropping bucket (1) and is used for dispersing liquid;

and the sealing cover (3) is positioned above the liquid dropping bucket (1), is matched with the liquid dropping bucket (1) in shape, and is used for sealing the upper part of the liquid dropping bucket (1) so as to integrally seal the liquid dropping bucket (1).

2. The ferrous chloride solution cooling device of claim 1, wherein:

the liquid dropping hopper (1) is a conical hopper with an upward opening; the liquid inlet pipe (1a) is obliquely led into the liquid dropping hopper (1) so that liquid can spirally drop around the liquid dropping hopper; the liquid discharge pipe (1b) is arranged at the bottom of the conical hopper.

3. The ferrous chloride solution cooling device of claim 1, wherein:

the liquid flying part (1c) is a separation blade structure which is protrudingly inserted on the inner side wall of the liquid falling hopper (1).

4. The ferrous chloride solution cooling device of claim 1, wherein:

and the sealing cover (3) is provided with a negative pressure hole (3 a) for being externally connected with negative pressure equipment to reduce the pressure in the liquid dropping hopper.

5. The ferrous chloride solution cooling device of claim 1, wherein:

the upper portion of the liquid dropping bucket (1) is provided with a liquid separating ring (1d), the liquid separating ring (1d) is located below the liquid inlet pipe (1a) and is annularly arranged around the inner wall of the liquid dropping bucket and used for guiding liquid to drop from the inner edge of the liquid separating ring (1d) to form a water curtain.

6. The ferrous chloride solution cooling device of claim 1, wherein:

the liquid dropping hopper (1) is internally provided with a liquid distribution part (2), the liquid distribution part (2) receives liquid introduced into the liquid inlet pipe (1a), and the liquid is discharged by utilizing the pores (2a) arranged on the liquid distribution part and is scattered into the liquid dropping hopper (1).

7. The ferrous chloride solution cooling device of claim 5, wherein:

8. The ferrous chloride solution cooling device of claim 7, wherein:

the liquid distribution part (2) is of a groove structure connected to the middle of the liquid distribution ring (1 d); the aperture (2a) is arranged on the bottom surface of the groove structure.