CN212669229U

CN212669229U - Discharge system for leaching slurry of leaching tower

Info

Publication number: CN212669229U
Application number: CN202020911014.XU
Authority: CN
Inventors: 李露; 杨洪武; 冯支斌
Original assignee: Yibin Tianyuan Haifeng Hetai Co ltd; Yibin Tianyuan Group Co Ltd
Current assignee: Yibin Tianyuan Haifeng Hetai Co ltd; Yibin Tianyuan Group Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-03-09
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses a leaching tower leaching slurry discharge system, which comprises a leaching tower, a filter and a circulating tank; the leaching tower is connected with the filter through a discharge pipe arranged at a discharge port at the bottom of the leaching tower, the circulating tank is communicated with the discharge pipe through an acid inlet pipe, an acid inlet circulating pump is arranged on the acid inlet pipe, a discharge flow regulating valve is further arranged on the discharge pipe, and the discharge flow regulating valve is arranged on a downstream discharge pipe at the communication position of the acid inlet pipe and the discharge pipe. The method has the advantages that the existing discharge system of the leaching slurry of the artificial rutile leaching tower is changed, a slurry tank and corresponding stirring equipment are not required to be arranged, the method of stirring the artificial rutile slurry by a stirrer is replaced, the failure rate of the equipment is obviously reduced, the continuous long-period operation can be realized, the stable and continuous output of the artificial rutile product is ensured, and the equipment and the device can stably operate.

Description

Discharge system for leaching slurry of leaching tower

Technical Field

The utility model relates to a chemical production equipment, especially a chlorination process titanium white powder production facility.

Background

The titanium dioxide produced by the chloride process has the advantages of high automation degree, good product quality, large scale and less discharge of three wastes, and becomes the development trend of the domestic titanium dioxide industry, and the country actively encourages the development of the titanium dioxide produced by the chloride process. However, the production of titanium dioxide by the chlorination process has high requirements on raw materials, the raw materials need to be enriched, hydrochloric acid is adopted to leach modified titanium concentrate in the preparation process of the artificial rutile, so that high-quality chlorinated raw materials, namely the artificial rutile can be obtained, and calcium, magnesium and nonferrous metal impurities in the materials are basically leached into a liquid phase after acid leaching. After the production process of the solid-liquid leaching reaction is carried out, leaching and filtering treatment is carried out on leached solid-liquid slurry, and after the solid-liquid leaching reaction is completed, the slurry needs to be discharged into a slurry tank and then slowly discharged into a filter for filtering. Because the specific gravity of the solid particles of the leaching materials is larger than that of the leaching liquid, the solid particles are very easy to settle, and in order to prevent the solid particles from being discharged due to the settlement, a stirrer is required to be added on the slurry tank to prevent the slurry from settling.

When the particle size of solid materials in the leached slurry is required to be kept unchanged, the slurry can be stirred at a high rotating speed, the physical refining phenomenon of the particles of the solid materials can occur under the stirring condition, and the product quality is influenced.

At present, carbon steel lining rubber stirrers are usually adopted in the prior production of the artificial rutile, but 6 stirrers are damaged in two or more months of short production time in our factory, and the analysis reason is that the lining rubber layer can resist corrosion but does not resist wear, the lining rubber layer is worn in a short time, and then the hydrochloric acid quickly corrodes steel.

If the apparatus uses an otherwise externally lined stirrer, such as an externally lined enamel or glass liner, but because the stirrer is large, the enamel or glass liner is very fragile during installation and can be damaged if the acid-resistant blocks of the leaching apparatus fall out into the slurry as it is discharged from the leaching tower in an impact.

Therefore, no method for solving the problem of stirrer damage can be found in the industry at present, once the stirrer is damaged, the system can be completely shut down, and the artificial rutile device cannot continuously and stably run for a long period.

SUMMERY OF THE UTILITY MODEL

In order to guarantee the stable continuous output of artificial rutile product, the device even running, the utility model provides a slurry discharge system is leached out to leaching tower.

The utility model provides a technical scheme that its technical problem adopted is: the leaching tower leaching slurry discharge system comprises a leaching tower, a filter and a circulating tank; the leaching tower is connected with the filter through a discharge pipe arranged at a discharge port at the bottom of the leaching tower, the circulating tank is communicated with the discharge pipe through an acid inlet pipe, an acid inlet circulating pump is arranged on the acid inlet pipe, a discharge flow regulating valve is further arranged on the discharge pipe, and the discharge flow regulating valve is arranged on a downstream discharge pipe at the communication position of the acid inlet pipe and the discharge pipe.

The utility model discloses utilize present artificial rutile leaching tower to be in the fluidization state when leaching, thereby advance the acid from leaching tower bottom through setting up into the acid pipe and keep leaching tower interior material fluidization not deposit. And meanwhile, a discharge flow regulating valve is arranged on the discharge pipe to regulate the flow entering the filtering equipment. The flow of acid inlet of the circulating pump is controlled to be 3-12 m³And h, slowly opening the discharge flow regulating valve, uniformly discharging the slurry out of the leaching tower along with the leaching acid liquid in the fluidized bed, directly performing filtering operation, simultaneously preventing the slurry in the tower from being deposited in a fluidized state, and continuously and stably discharging the slurry without blocking the system.

As a further improvement of the utility model, the filter is a belt filter.

The utility model has the advantages that: the existing discharge system of the leaching slurry of the artificial rutile leaching tower is changed, a slurry tank and corresponding stirring equipment are not required to be arranged, the method for stirring the artificial rutile slurry by a stirrer is replaced, the failure rate of the equipment is obviously reduced, the continuous long-period operation can be realized, the stable and continuous output of the artificial rutile product is ensured, and the equipment and the device can stably operate.

Drawings

Fig. 1 is a schematic structural diagram of a leaching tower leaching slurry discharge system of the utility model.

Labeled as: 1-leaching tower, 2-belt filter, 3-circulation tank, 4-discharging pipe, 5-acid inlet pipe, 6-acid inlet circulation pump and 7-discharging flow regulating valve.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example (b):

as shown in figure 1, the leaching tower leaching slurry discharge system comprises a leaching tower 1, a belt filter 2 and a circulating tank 3; leaching tower 1 links to each other with belt filter 2 through setting up row's material pipe 4 at its bottom discharge gate, circulation tank 3 is through advancing acid pipe 5 and arranging material pipe 4 intercommunication, it is provided with into acid circulating pump 6 on the acid pipe 5 to advance, it arranges material flow control valve 7 still to be provided with on row material pipe 4, it arranges on the material pipe to arrange material flow control valve 7 sets up the low reaches of advancing acid pipe 5 and arranging material pipe 2 intercommunication department on.

During working, the artificial rutile leaching is carried out in a fluidized bed mode, the leaching process is completed, steam used for leaching is closed, an acid inlet circulating pump 6 is started to feed acid from the bottom of the leaching tower 1 through an acid inlet pipe 5, so that fluidization and non-deposition of materials in the leaching tower 1 are kept, and the mass concentration of acid liquor is 1-10%; the discharging temperature of the mixed slurry is controlled to be 50-120 ℃ by controlling the concentration and flow of the acid liquor, and the solid content of the mixed slurry is controlled to be 3-50%. And slowly opening a discharge flow regulating valve 7, uniformly discharging the slurry out of the leaching tower 1 along with the leaching acid liquid in the fluidized bed, and directly performing filtering operation on the slurry in the belt filter 2, wherein the temperature of the leached slurry in the belt filter 2 is controlled to be 80-85 ℃. The slurry in the tower is not deposited in a fluidized state, and can be continuously and stably discharged without blocking the system.

Claims

1. The leaching tower leaching slurry discharge system comprises a leaching tower, a filter and a circulating tank; the leaching tower is connected with the filter through a discharge pipe arranged at a discharge port at the bottom of the leaching tower, the circulating tank is communicated with the discharge pipe through an acid inlet pipe, an acid inlet circulating pump is arranged on the acid inlet pipe, a discharge flow regulating valve is further arranged on the discharge pipe, and the discharge flow regulating valve is arranged on a downstream discharge pipe at the communication position of the acid inlet pipe and the discharge pipe.

2. The leach tower leach slurry discharge system according to claim 1, wherein: the filter is a belt filter.