阅读说明：本技术 一种无机化工颜料生产用原料晶种的制备系统 (Preparation system of raw materials seed crystal for inorganic chemical pigment production ) 是由 李炳亮 陈宇 于 2021-02-22 设计创作，主要内容包括：本发明提供一种无机化工颜料生产用原料晶种的制备系统,所述系统包括晶种稀释单元、晶种制备单元、晶种沉降单元和晶种储存单元依次相连；将需要稀释的四氯化钛输入晶种稀释单元中稀释,稀释后分批次的往晶种制备单元送料；稀释后的四氯化钛溶液与碱液进行反应,实现部分中和达到酸/钛目标比值并完成中和反应；将晶种制备单元中得到的晶种悬浮液导入晶种沉降单元中进行析出沉降后输送至晶种储存单元；所述晶种稀释单元包括稀释槽、稀释泵、稀释混合器、过滤器和换热器。本发明提供四氯化钛晶种的制备系统能够提高生产质量和效率,实现连续化生产。(The invention provides a preparation system of raw material seed crystals for inorganic chemical pigment production, which comprises a seed crystal diluting unit, a seed crystal preparation unit, a seed crystal settling unit and a seed crystal storage unit which are sequentially connected; inputting titanium tetrachloride to be diluted into a seed crystal diluting unit for dilution, and feeding the diluted titanium tetrachloride to a seed crystal preparation unit in batches; reacting the diluted titanium tetrachloride solution with alkali liquor to realize partial neutralization to reach the acid/titanium target ratio and complete the neutralization reaction; introducing the seed crystal suspension obtained in the seed crystal preparation unit into a seed crystal sedimentation unit for precipitation and sedimentation, and then conveying the seed crystal suspension to a seed crystal storage unit; the seed crystal diluting unit comprises a diluting tank, a diluting pump, a diluting mixer, a filter and a heat exchanger. The preparation system of the titanium tetrachloride seed crystal provided by the invention can improve the production quality and efficiency and realize continuous production.)

1. The preparation system of the raw material seed crystal for the production of the inorganic chemical pigment is characterized by comprising a seed crystal diluting unit (100), a seed crystal preparation unit (200), a seed crystal settling unit (300) and a seed crystal storage unit (400) which are sequentially connected;

titanium tetrachloride to be diluted is input into a seed crystal diluting unit (100) for dilution, and the diluted titanium tetrachloride is fed to a seed crystal preparation unit (200) in batches; reacting the diluted titanium tetrachloride solution with alkali liquor to realize neutralization reaction; the seed crystal suspension obtained in the seed crystal preparation unit (200) is introduced into a seed crystal sedimentation unit (300) for precipitation and sedimentation, and then is conveyed to a seed crystal storage unit (400).

2. The system for preparing the raw material seed crystal for the production of the inorganic chemical pigment according to claim 1, wherein the seed crystal diluting unit (100) comprises a diluting tank (11), a diluting pump (12), a diluting mixer (13), a filter (14) and a heat exchanger (15);

the dilution tank (11), the dilution pump (12), the dilution mixer (13), the filter (14) and the heat exchanger (15) are sequentially connected, the dilution tank (11) is connected with the heat exchanger (15), and the material flows into the heat exchanger (15) from the dilution tank (11); the materials added into the dilution tank (11) comprise titanium tetrachloride and hydrochloric acid which need to be diluted, desalted water needs to be added into the dilution mixer (13), the heat exchanger (15) is connected with the seed crystal preparation unit (200), and the filtered titanium tetrachloride diluent enters the seed crystal preparation unit (200) under the action of the heat exchanger.

3. The system for preparing the raw material seed crystal for the production of inorganic chemical pigments according to claim 2, wherein the seed crystal preparation unit (200) comprises a post-dilution storage tank (21), a post-dilution storage tank pump (22), a seed crystal preparation tank (23), a lye tank (24) and a lye tank pump (25);

the diluted storage tank (21), the diluted storage tank pump (22) and the seed crystal preparation tank (23) are sequentially connected, the alkali liquor tank (24), the alkali liquor tank pump (25) and the seed crystal preparation tank (23) are sequentially connected, and routes which are sequentially connected with the diluted storage tank (21), the diluted storage tank pump (22) and the seed crystal preparation tank (23) are mutually connected in parallel;

the diluted storage tank (21) is connected with the heat exchanger (15), the diluted titanium tetrachloride in the diluted storage tank (21) is guided into the seed crystal preparation tank (23) by the diluted storage tank pump (22), and the alkali liquor in the alkali liquor tank (24) is guided into the seed crystal preparation tank (23) by the alkali liquor tank pump (25) to complete the neutralization reaction.

4. The system for preparing the raw material seed crystal for the production of inorganic chemical industry pigment according to claim 3, wherein the seed crystal preparation unit (200) further comprises a waste tank (26) and a waste tank pump (27) which are connected in sequence, the diluted titanium tetrachloride waste is conveyed from the diluted storage tank (21) to the waste tank (26) through the diluted storage tank pump (22), and the waste liquid in the waste tank (26) is conveyed to the waste liquid treatment unit through the waste tank pump (27).

5. The system for preparing the raw material seed crystal for the production of inorganic chemical pigments is characterized in that the seed crystal settling unit (300) comprises a hot water tank (31), a hot water pump (32) and a seed crystal settling tank (33);

washing the seed crystal suspension prepared in the seed crystal preparation tank (23) by hot water obtained through the hot water tank (31) in the process water passing through the hot water tank (31), the hot water pump (32) and the seed crystal settling tank (33) which are connected in sequence, settling the seed crystal after the seed crystal is separated out, controlling the concentration of the settled seed crystal at 40 g/L, and discharging supernatant containing a large amount of soluble salts generated by neutralization to obtain the waste seed crystal produced in the seed crystal settling tank (33); the seed crystal prepared in the seed preparation tank (23) and the waste seed crystal enter the seed storage unit (400).

6. The system for preparing the raw material seed crystal for the production of inorganic chemical pigments according to claim 5, wherein the seed storage unit (400) comprises a seed storage tank (41), a seed storage tank transportation pump (42), a waste seed storage tank (43), a waste seed storage tank transportation pump (44); the seed crystal storage tank (41) and the waste seed crystal storage tank (43) are both connected with the seed crystal settling tank (33) and are respectively used for storing seed crystals and waste seed crystals.

7. The system for preparing the raw material seed crystal for the production of the inorganic chemical pigment according to claim 6, wherein the seed crystal storage tank (41) is further sequentially connected with a washing tower (45) and a washing liquid delivery pump (46), the seed crystal storage tank (41) after the reaction is washed by the washing tower (45), and waste liquid for cleaning the seed crystal storage tank (41) is discharged by the washing liquid delivery pump (46).

8. The system for preparing the raw material seed crystal for producing the inorganic chemical pigment according to claim 1, wherein the alkali solution is a sodium hydroxide solution.

Technical Field

The invention belongs to the technical field of inorganic chemical pigment production, and particularly relates to a preparation system of raw material seed crystals for inorganic chemical pigment production.

Background

Titanium tetrachloride is generally used mainly for the production of titanium sponge and titanium white by chlorination process as an important intermediate raw material in the titanium industry.

Titanium dioxide is an important white pigment and porcelain glaze, and compared with other white pigments, the titanium dioxide has superior whiteness, tinting strength, covering power, weather resistance, heat resistance and chemical stability, and particularly has no toxicity. The titanium dioxide production process belongs to the fine chemical engineering range, the production process is continuously optimized, the production cost of the titanium dioxide is reduced to the maximum extent under the condition of not influencing the yield and the quality of the titanium dioxide, and the titanium dioxide production process is always the target pursued by titanium dioxide manufacturers.

In the prior art, a system for preparing titanium tetrachloride crystal seeds cannot realize continuous production, and the preparation efficiency is not high.

Disclosure of Invention

In order to solve the problems, the invention provides a preparation system of raw material seed crystals for producing inorganic chemical pigments.

The invention provides the following technical scheme:

a preparation system of raw material seed crystals for inorganic chemical pigment production comprises a seed crystal diluting unit, a seed crystal preparation unit, a seed crystal settling unit and a seed crystal storage unit which are sequentially connected;

inputting titanium tetrachloride to be diluted into a seed crystal diluting unit for dilution, and feeding the diluted titanium tetrachloride to a seed crystal preparation unit in batches; reacting the diluted titanium tetrachloride solution with alkali liquor to realize neutralization reaction; introducing the seed crystal suspension obtained in the seed crystal preparation unit into a seed crystal sedimentation unit for precipitation and sedimentation, and then conveying the seed crystal suspension to a seed crystal storage unit;

preferably, the seed crystal diluting unit comprises a diluting tank, a diluting pump, a diluting mixer, a filter and a heat exchanger;

the dilution tank, the dilution pump, the dilution mixer, the filter and the heat exchanger are sequentially connected, the dilution tank is connected with the heat exchanger, and the material flows into the heat exchanger from the dilution tank; the materials added into the dilution tank comprise titanium tetrachloride and hydrochloric acid which need to be diluted, desalted water needs to be added into the dilution mixer, the heat exchanger is connected with the seed crystal preparation unit, and the filtered titanium tetrachloride diluent enters the seed crystal preparation unit under the action of the heat exchanger.

Preferably, the seed crystal preparation unit comprises a diluted storage tank, a diluted storage tank pump, a seed crystal preparation tank, a lye tank and a lye tank pump;

the diluted storage tank, the diluted storage tank pump and the seed crystal preparation tank are sequentially connected, the alkali liquor tank pump and the seed crystal preparation tank are sequentially connected, and the routes which are sequentially connected with the diluted storage tank, the diluted storage tank pump and the seed crystal preparation tank are mutually connected in parallel;

the diluted storage tank is connected with the heat exchanger, the diluted titanium tetrachloride in the diluted storage tank is guided into the crystal seed preparation tank by the diluted storage tank pump, and the alkali liquor in the alkali liquor tank is guided into the crystal seed preparation tank by the alkali liquor tank pump to complete neutralization reaction.

Preferably, the seed crystal preparation unit further comprises a waste tank and a waste tank pump which are connected in sequence, the diluted titanium tetrachloride waste is conveyed to the waste tank from the diluted storage tank through the diluted storage tank pump, and the waste liquid in the waste tank is conveyed to the waste liquid treatment unit through the waste tank pump.

Preferably, the seed crystal settling unit comprises a hot water tank, a hot water pump and a seed crystal settling tank;

the process water passes through the hot water tank, the hot water pump and the crystal seed settling tank which are connected in sequence, the crystal seed suspension prepared in the crystal seed preparation tank is washed by hot water obtained through the hot water tank, the crystal seed is settled after being separated out, the concentration of the settlement is controlled at 40 g/L, supernatant containing a large amount of soluble salt generated by neutralization is discharged, and the waste crystal seed produced in the crystal seed settling tank is obtained; and the seed crystal prepared in the seed crystal preparation tank and the waste seed crystal enter the seed crystal storage unit.

Preferably, the seed crystal storage unit comprises a seed crystal storage tank, a seed crystal storage tank transportation pump, a waste seed crystal storage tank and a waste seed crystal storage tank transportation pump; the seed crystal storage tank and the waste seed crystal storage tank are connected with the seed crystal settling tank and are respectively used for storing seed crystals and waste seed crystals.

Preferably, the seed crystal storage tank is further sequentially connected with a washing tower and a washing liquid delivery pump, the seed crystal storage tank after the reaction is washed by the washing tower, and waste liquid for cleaning the seed crystal storage tank is discharged by the washing liquid delivery pump.

Preferably, the alkali liquor is sodium hydroxide solution.

The invention has the beneficial effects that:

the invention provides a preparation system of titanium tetrachloride crystal seeds, which comprises a crystal seed dilution unit, a crystal seed preparation unit, a crystal seed sedimentation unit and a crystal seed storage unit which are sequentially connected; inputting titanium tetrachloride to be diluted into a seed crystal diluting unit for dilution, and feeding the diluted titanium tetrachloride to a seed crystal preparation unit in batches; reacting the diluted titanium tetrachloride solution with alkali liquor to realize neutralization reaction; introducing the seed crystal suspension obtained in the seed crystal preparation unit into a seed crystal sedimentation unit for precipitation and sedimentation, and then conveying the seed crystal suspension to a seed crystal storage unit; the production quality and efficiency can be improved, and continuous production is realized;

the process water passes through the hot water tank, the hot water pump and the crystal seed settling tank which are connected in sequence, the crystal seed suspension prepared in the crystal seed preparation tank is washed by hot water obtained through the hot water tank, the crystal seed is settled after being separated out, the concentration of the settlement is controlled at 40 g/L, supernatant containing a large amount of soluble salt generated by neutralization is discharged, and the waste crystal seed produced in the crystal seed settling tank is obtained; the seed crystal and the waste seed crystal prepared in the seed crystal preparation tank enter the seed crystal storage unit, the sedimentation speed is controlled, and the high-purity and high-yield titanium tetrachloride seed crystal is obtained.

Drawings

FIG. 1 is a schematic view of a production system of the present invention;

FIG. 2 is a diagram of a seed dilution unit section;

FIG. 3 is a diagram of a seed preparation unit section;

FIG. 4 is a diagram of a seed precipitation unit section;

fig. 5 is a diagram of a seed storage unit section.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, the present embodiment provides a storage device for titanium tetrachloride seed crystals, and the system includes a seed crystal dilution unit 100, a seed crystal preparation unit 200, a seed crystal sedimentation unit 300, and a seed crystal storage unit 400 connected in sequence;

inputting titanium tetrachloride to be diluted into a seed crystal diluting unit 100 for dilution, and feeding the diluted titanium tetrachloride to a seed crystal preparation unit 200 in batches; reacting the diluted titanium tetrachloride solution with alkali liquor to realize neutralization reaction; the seed crystal suspension obtained in the seed crystal preparation unit 200 is introduced into the seed crystal precipitation unit 300, precipitated and precipitated, and then transported to the seed crystal storage unit 400.

Further, the seed crystal diluting unit 100 includes a diluting tank 11, a diluting pump 12, a diluting mixer 13, a filter 14, and a heat exchanger 15;

the dilution tank 11, the dilution pump 12, the dilution mixer 13, the filter 14 and the heat exchanger 15 are sequentially connected, the dilution tank 11 is connected with the heat exchanger 15, and the material flows into the heat exchanger 15 from the dilution tank 11; the materials added in the dilution tank 11 comprise titanium tetrachloride and hydrochloric acid which need to be diluted, desalted water needs to be added in the dilution mixer 13, the heat exchanger 15 is connected with the seed crystal preparation unit 200, and the filtered titanium tetrachloride diluent enters the seed crystal preparation unit 200 under the action of the heat exchanger.

In a further embodiment, the seed crystal preparation unit 200 includes a post-dilution tank 21, a post-dilution tank pump 22, a seed crystal preparation tank 23, a soda tank 24, and a soda tank pump 25;

the diluted storage tank 21, the diluted storage tank pump 22 and the seed crystal preparation tank 23 are sequentially connected, the lye tank 24, the lye tank pump 25 and the seed crystal preparation tank 23 are sequentially connected, and the routes sequentially connected with the diluted storage tank 21, the diluted storage tank pump 22 and the seed crystal preparation tank 23 are mutually connected in parallel;

the diluted storage tank 21 is connected to the heat exchanger 15, the diluted titanium tetrachloride in the diluted storage tank 21 is introduced into the seed crystal preparation tank 23 by the diluted storage tank pump 22, and the alkali solution in the alkali solution tank 24 is introduced into the seed crystal preparation tank 23 by the alkali solution tank pump 25, thereby completing the neutralization reaction.

In a further embodiment, the seed crystal preparation unit 200 further comprises a waste tank 26 and a waste tank pump 27 connected in sequence, the diluted titanium tetrachloride waste is conveyed from the post-dilution storage tank 21 to the waste tank 26 through the post-dilution storage tank pump 22, and the waste liquid in the waste tank 26 is conveyed to the waste liquid treatment unit through the waste tank pump 27.

In a further embodiment, the seed precipitation unit 300 comprises a hot water tank 31, a hot water pump 32 and a seed precipitation tank 33;

the process water passes through the hot water tank 31, the hot water pump 32 and the crystal seed settling tank 33 which are connected in sequence, the crystal seed suspension prepared in the crystal seed preparation tank 23 is washed by hot water obtained through the hot water tank 31, the crystal seeds are settled after being separated out, the concentration of the settlement is controlled at 40 g/L, supernatant containing a large amount of soluble salt generated by neutralization is discharged, and the waste crystal seeds produced in the crystal seed settling tank 33 are obtained; the seed crystal prepared in the seed preparation tank 23 and the waste seed crystal enter the seed storage unit 400.

In a further embodiment, the seed storage unit 400 includes a seed tank 41, a seed tank transport pump 42, a waste seed tank 43, a waste seed tank transport pump 44; the seed crystal storage tank 41 and the waste seed crystal storage tank 43 are connected to the seed precipitation tank 33 and are used to store seed crystals and waste seed crystals, respectively.

In a further embodiment, the seed storage tank 41 is further connected to a washing tower 45 and a washing liquid delivery pump 46 in sequence, the seed storage tank 41 after the reaction is washed by the washing tower 45, and the waste liquid for cleaning the seed storage tank 41 is discharged by the washing liquid delivery pump 46.

In a further embodiment, the lye is a sodium hydroxide solution.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.