阅读说明：本技术 强酸盐气相法白炭黑制备系统 (System for preparing white carbon black by strong acid salt gas phase method ) 是由 汤广斌 甘世杰 刘旭 王恩伟 郑强 李冬 孙浩杰 位南南 于 2018-08-20 设计创作，主要内容包括：本发明涉及强酸盐气相法白炭黑制备系统,包括强酸盐供料装置、水玻璃供料装置、反应釜和产品收集装置,所述强酸盐供料装置和水玻璃供料装置分别与反应釜相连接,还包括相连接的压滤装置和相变水处理装置,所述反应釜和产品收集装置分别与压滤装置相连接,所述相变水处理装置与强酸盐供料装置相连接,所述强酸盐供料装置为联碱生产母液供给装置。本发明基于现有联碱生产工艺及白炭黑制备方法进行有机结合设计,实现白炭黑的高效自动化生产,并大幅降低生产成本,且产品纯度高,同时,所得产品的洗涤液通过相变水处理后,返回联碱生产装置当做原料,有效解决了联碱生产副产物取出过程能耗高和积压存储问题,节约空间,降低经济成本。(The invention relates to a system for preparing white carbon black by using a strong acid salt gas phase method, which comprises a strong acid salt feeding device, a water glass feeding device, a reaction kettle and a product collecting device, wherein the strong acid salt feeding device and the water glass feeding device are respectively connected with the reaction kettle, the system also comprises a filter pressing device and a phase change water treatment device which are connected with each other, the reaction kettle and the product collecting device are respectively connected with the filter pressing device, the phase change water treatment device is connected with the strong acid salt feeding device, and the strong acid salt feeding device is a combined alkali production mother liquor feeding device. The invention is designed by organic combination based on the existing combined alkali production process and the white carbon black preparation method, realizes high-efficiency automatic production of the white carbon black, greatly reduces the production cost, has high product purity, and simultaneously, the washing liquid of the obtained product is treated by phase-change water and then returns to a combined alkali production device to be used as a raw material, thereby effectively solving the problems of high energy consumption and overstock storage in the process of taking out the byproducts in the combined alkali production, saving the space and reducing the economic cost.)

1. Strong acid salt vapor phase white carbon black preparation system, including strong acid salt feedway, water glass feedway, reation kettle and product collection device, strong acid salt feedway with water glass feedway respectively with reation kettle is connected its characterized in that: still including the filter pressing device and the phase transition water treatment facilities that are connected, reation kettle with product collection device respectively with the filter pressing device is connected, phase transition water treatment facilities with strong acid salt feedway is connected, strong acid salt feedway is the antithetical couplet alkali production mother liquor feeding device.

2. The system for preparing the strong acid salt fumed silica according to claim 1, which is characterized in that: the lower part of the reaction kettle is connected with the filter pressing device, the bottom of the filter pressing device is connected with the product collecting device, and the lower part of the phase change water treatment device is connected with the combined soda production mother liquor supply device.

3. The system for preparing the strong acid salt fumed silica according to claim 1, which is characterized in that: the combined alkali production mother liquor supply device is connected with the reaction kettle through a U-shaped pipeline.

4. The system for preparing the strong acid salt fumed silica according to any one of claims 1 to 3, which is characterized in that: the system is characterized in that the reaction kettle is provided with a material uniform distribution device, an automatic stirring device, a heating device, a cooling device, a negative pressure evaporation device, an automatic cleaning device and a discharging device, wherein the discharging device is connected with the filter pressing device through a material liquid conveying pipeline, and the combined alkali production mother liquid supply device and the water glass supply device are respectively connected with the material uniform distribution device.

5. The system for preparing the strong acid salt fumed silica according to claim 4, which is characterized in that: the negative pressure evaporation device is an alternating load negative pressure evaporation device and comprises a vacuum pump and a gas ammonia recovery cooler which are connected.

6. The system for preparing the strong acid salt fumed silica according to claim 4, which is characterized in that: the discharging device comprises a discharging valve and a centrifugal pump, and the centrifugal pump is connected with the feed liquid conveying pipeline.

7. The system for preparing the strong acid salt fumed silica according to claim 4, which is characterized in that: and the phase change water treatment device is provided with a discharger, and the discharger is connected with the combined alkali production mother liquor supply device through a treatment liquor conveying pipeline.

8. The system for preparing the strong acid salt fumed silica according to claim 4, which is characterized in that: the material uniform distribution device is provided with a plurality of branch pipe distributors, and each branch pipe distributor is provided with a spray head.

9. The system for preparing the strong acid salt fumed silica according to claim 8, which is characterized in that: the branch pipe distributors are divided into two groups, namely a first branch pipe distributor and a second branch pipe distributor, the first branch pipe distributor is connected with the combined alkali production mother liquor supply device, and the second branch pipe distributor is connected with the water glass supply device.

10. The system for preparing the strong acid salt fumed silica according to any one of claims 1 to 3, which is characterized in that: the combined alkali production mother liquor supply device is used for providing a strong acid salt raw material to the reaction kettle, and the strong acid salt raw material is a circulating feed liquid in combined alkali production.

Technical Field

The invention relates to the technical field of white carbon black production and preparation, in particular to a system for preparing white carbon black by using a strong acid salt gas phase method of a combined alkali production byproduct.

Background

With the application and popularization of white carbon black, the demand of white carbon black is increasing day by day, and accordingly, the market price is rising continuously, but the supply and demand are still short. The white carbon black is roughly divided into fumed silica and precipitated silica according to the production method. The fumed silica is white amorphous flocculent semitransparent solid colloidal nano particles in a normal state, but the preparation process is complex and the equipment investment is high. At present, most of the industrial production routes of white carbon black are precipitation methods, and the precipitation method white carbon black refers to silicon dioxide produced by using sulfuric acid, hydrochloric acid, strong acid salt and water glass as basic raw materials. The preparation system of the precipitated white carbon black has high requirements on temperature and pH value, the technological process of preparing the white carbon black by adopting the strong acid salt and the water glass as raw materials is an exothermic reaction, volatile irritant gas ammonia is generated at the same time, the environment is polluted, and the automation degree of the traditional production equipment is low.

In addition, a combined soda production method, called as a combined soda method for short, is a main method for producing soda, has a large number of byproducts in the combined soda production, is mostly used in the market of compound fertilizers, has strong seasonality, is easy to agglomerate, occupies a large amount of space for storage, and has high economic cost.

Disclosure of Invention

The invention aims to provide a system for preparing the white carbon black by the strong acid salt gas phase method, which is designed based on the existing combined alkali production process and the white carbon black preparation method, realizes the high-efficiency automatic production of the white carbon black, greatly reduces the production cost to meet the market demand, effectively solves the problem of overstocked storage of the byproducts of the combined alkali production, and saves the space and the economic cost.

The technical scheme for solving the problems is as follows: strong acid salt vapor phase method white carbon black preparation system, including strong acid salt feedway, water glass feedway, reation kettle and product collection device, strong acid salt feedway with water glass feedway respectively with reation kettle is connected, still including the filter-pressing device and the phase transition water treatment facilities that are connected, reation kettle with product collection device respectively with filter-pressing device is connected, phase transition water treatment facilities with strong acid salt feedway is connected, strong acid salt feedway is the antithetical couplet alkali production mother liquor feeding device.

Further, in the system for preparing the white carbon black by the strong acid salt vapor phase method, the lower part of the reaction kettle is connected with the filter pressing device, the bottom of the filter pressing device is connected with the product collecting device, and the lower part of the phase change water treatment device is connected with the combined soda production mother liquor supply device.

Further, in the system for preparing the strong acid salt fumed silica, the device for supplying the mother liquor in the combined alkali production is connected with the reaction kettle through a U-shaped pipeline.

Further, in the system for preparing the strong acid salt vapor phase white carbon black, the reaction kettle is provided with a material uniform distribution device, an automatic stirring device, a heating device, a cooling device, a negative pressure evaporation device, an automatic cleaning device and a discharging device, the discharging device is connected with the filter pressing device through a material liquid conveying pipeline, and the combined alkali production mother liquid supply device and the water glass supply device are respectively connected with the material uniform distribution device.

Preferably, in the system for preparing the strong acid salt fumed silica, the negative pressure evaporation device is an alternating load negative pressure evaporation device and comprises a vacuum pump and a gas ammonia recovery cooler which are connected with each other.

Preferably, in the system for preparing the strong acid salt fumed silica, the discharging device comprises a discharging valve and a centrifugal pump, and the centrifugal pump is connected with the feed liquid conveying pipeline.

Preferably, in the system for preparing the strong acid salt fumed silica, a discharger is arranged on the phase change water treatment device, and the discharger is connected with the combined alkali production mother liquor supply device through a treatment liquor conveying pipeline.

Preferably, in the system for preparing the strong acid salt fumed silica, the material uniform distribution device is provided with a plurality of branch pipe distributors, and each branch pipe distributor is provided with a spray head.

Preferably, in the system for preparing the silica white by the strong acid salt vapor phase method, two groups of branch pipe distributors are provided, namely a first branch pipe distributor and a second branch pipe distributor, wherein the first branch pipe distributor is connected with the combined alkali production mother liquor supply device, and the second branch pipe distributor is connected with the water glass supply device.

Further, in the system for preparing the white carbon black by the strong acid salt vapor phase method, the device for supplying the mother liquor for the combined alkali production is used for supplying the raw material of the strong acid salt to the reaction kettle, and the raw material of the strong acid salt is a circulating feed liquid in the combined alkali production.

Compared with the prior art, the invention has the beneficial effects that: the existing production equipment is fully utilized, organic combination design is carried out based on the existing combined alkali production process and the white carbon black preparation method, efficient automatic production of the white carbon black is realized, the production cost is greatly reduced, the product purity is high, meanwhile, after the water content of the washing liquid of the obtained product is reduced to the system requirement index through phase-change water treatment, the washing liquid returns to a combined alkali production system device to serve as a raw material, the problems of high energy consumption and overstocked storage in the process of taking out ammonium chloride from the combined alkali production byproducts are effectively solved, the space is saved, the economic cost is reduced, and the method is suitable for industrial popularization and application.

Drawings

FIG. 1 is a schematic structural diagram of a system for preparing fumed silica by a strong acid salt vapor phase method.

Detailed Description

The present invention will be described in detail below with reference to the drawings and examples, but the present invention is not limited to the examples.

As shown in fig. 1, the system for preparing white carbon black by using a strong acid salt vapor phase method comprises a strong acid salt feeding device, a water glass feeding device, a reaction kettle and a product collecting device, wherein the strong acid salt feeding device and the water glass feeding device are respectively connected with the reaction kettle, the system also comprises a filter pressing device and a phase change water treatment device which are connected with each other, the reaction kettle and the product collecting device are respectively connected with the filter pressing device, the phase change water treatment device is connected with the strong acid salt feeding device, and the strong acid salt feeding device is a combined alkali production mother liquor feeding device.

In the embodiment, the combined alkali production process and the white carbon black preparation method are organically combined, so that the problems of high energy consumption, overstock storage and the like in the process of taking out ammonium chloride from the byproducts in the combined alkali production are solved while the white carbon black product is prepared. When the method is specifically applied, a combined alkali production mother liquor supply device is used as a strong acid salt supply device to add a strong acid salt raw material into a reaction kettle, meanwhile, the water glass supply device is used for adding a water glass raw material into the reaction kettle, the two raw materials are fully mixed in the reaction kettle and react to obtain a white carbon black product feed liquid, the obtained white carbon black product feed liquid is treated by a filter pressing device to ensure the high purity of the product, the white carbon black product obtained after filter pressing treatment is sent to a product collecting device for collection, the filtrate obtained after filter pressing treatment is sent to a phase change water treatment device for heavy component recovery treatment, the water content is reduced to the index required by the system through evaporation phase change water treatment, and a heavy component recovery feed liquid is obtained, the heavy component feed liquid is sodium chloride generated by water and reaction and a sodium chloride supersaturated solution in the system, and the obtained heavy component feed liquid is recovered and sent to a combined alkali production system for continuous recycling, thereby fully realizing energy conservation and loss reduction, having no other pollutant discharge and greatly enhancing the environmental protection effect.

In the above embodiment, in order to ensure that the white carbon black product is prepared and solve the problems of energy consumption of by-products in the co-alkali production and the like, preferably, the raw material of strong acid salt is added into the reaction kettle through the co-alkali production mother liquor supply device, the raw material of strong acid salt is a circulating feed liquor in the co-alkali production, and the fixed ammonia content of the circulating feed liquor is 35 tt-90 tt (tt is an ammonia water titer and is used for representing the ammonia water concentration, 1mol/L is equivalent to 20tt, and 1 titer is 0.85 g ammonia/L).

In the above embodiment, in order to ensure efficient operation of the system, preferably, the lower part of the reaction kettle is connected with the pressure filter device, the bottom of the pressure filter device is connected with the product collecting device, and the lower part of the phase change water treatment device is connected with the combined soda production mother liquor supply device, so that the separation and recovery are accelerated.

In the above embodiment, in order to improve the uniformity of the material reaction, preferably, the combined alkali production mother liquor supply device is connected to the reaction kettle through a U-shaped pipeline, so as to reduce the potential difference; preferably, the U-shaped pipeline is connected with the distributor in the reaction kettle, so that the strong acid salt raw material is uniformly distributed in the reaction kettle so as to be fully mixed with the water glass raw material.

In some embodiments of the present invention, in order to improve the production efficiency of the white carbon black product and the quality of the white carbon black product, preferably, a material uniform distribution device, an automatic stirring device, a heating device, a cooling device, a negative pressure evaporation device, an automatic cleaning device, and a discharging device are arranged on the reaction kettle, the discharging device is connected to the filter pressing device through a material liquid conveying pipeline, and the combined alkali production mother liquid supply device and the water glass supply device are respectively connected to the material uniform distribution device.

When the method is specifically applied to the embodiment, on the basis of basic operation of a system, the strong acid salt raw material and the water glass raw material are uniformly distributed and contacted in the reaction kettle through the material uniform distribution device, and are stirred through the automatic stirring device, so that the reaction materials are fully and uniformly mixed, the uniformity of the reaction is guaranteed, the reaction speed and the utilization rate of the materials are improved, the temperature of the reaction is regulated through the heating device and the cooling device during the reaction, the temperature stability of the reaction is guaranteed, the pressure of the reaction in the reaction kettle is controlled through the negative pressure evaporation device, and the whole reaction process is guaranteed to be stably carried out; after the reaction is finished, the material is quickly discharged through the discharging device, and the automatic cleaning device is started to clean the inner wall of the reaction kettle and the automatic stirring device at the same time, so that the cleaning liquid and the material liquid obtained by the reaction quickly enter the filter pressing device from the bottom of the reaction kettle for filter pressing; through the arrangement, the uniform and stable operation of the white carbon black preparation is guaranteed, and the production efficiency and the product quality are greatly improved.

In the above embodiment, in order to ensure the pressure stability required for the reaction in the reaction kettle, the negative pressure evaporation device is preferably an alternating load negative pressure evaporation device, the alternating load negative pressure evaporation device includes a vacuum pump and a gas ammonia recovery cooler connected to each other, and the pressure inside the reaction kettle is adjusted by the combined action of the vacuum pump and the gas ammonia recovery cooler.

In the above embodiment, in order to ensure that the obtained product can be quickly subjected to filter pressing purification and avoid the crystal phase combination intervention of other byproducts, the discharging device comprises a discharging valve and a centrifugal pump, the centrifugal pump is connected with the material liquid conveying pipeline, the discharging valve is arranged at the bottom of the reaction kettle, the discharging valve is opened, and the material liquid flowing downwards is accelerated by the centrifugal pump and conveyed to the filter pressing device through the material liquid conveying pipeline.

In the above embodiment, in order to accelerate the circulation supply of the feed liquid for the production of the combined alkali, preferably, the phase-change water treatment device is provided with a discharger, and the discharger is connected with the feed device of the combined alkali production mother liquid through a treatment liquid conveying pipeline, so as to improve the production efficiency.

In the above embodiment, in order to enhance the uniformity of the reaction, preferably, the material uniform distribution device is provided with a plurality of branch pipe distributors, and each branch pipe distributor is provided with a spray head; preferably, there are two groups of branch pipe distributors, namely a first branch pipe distributor and a second branch pipe distributor, wherein the first branch pipe distributor is connected with the combined soda production mother liquor supply device, and the second branch pipe distributor is connected with the water glass supply device; the combined alkali production mother liquor supply device is preferably connected with the first branch pipe distributor through the U-shaped pipe, the strong acid salt material provided by the combined alkali production mother liquor supply device is uniformly distributed in the reaction kettle through the first branch pipe distributor while the bit pressure is reduced, and the water glass material provided by the water glass supply device of the second branch pipe distributor is uniformly distributed in the reaction kettle; preferably, first branch pipe distributor and second branch pipe distributor are adjacent to be set up and act on simultaneously to make relevant reaction material evenly distributed and abundant contact in reation kettle, thereby cooperate automatic stirring device's stirring, the homogeneity of abundant guarantee reaction, and then provide the assurance for product quality.

The present invention is not limited to the above-described embodiments, and any obvious modifications or alterations to the above-described embodiments may be made by those skilled in the art without departing from the spirit of the present invention and the scope of the appended claims.