CN201190107Y - Titanium tetrachloride collecting device - Google Patents

Abstract

The utility model discloses a titanium tetrachloride collecting device for separating and collecting titanium tetrachloride liquid and mud, which can improve the yield of titanium tetrachloride produced by chlorination process. The collecting device comprises a condensation collector connected to a chlorination furnace through an air inlet (5), a liquid outlet (6) and a tail gas outlet (8) are arranged on the condensation collector, and a mud outlet (7) is also arranged on the condensation collector. The condensation collector can also be connected to a tail gas buffer tank (2), so that the titanium tetrachloride-containing gas from the chlorination furnace is discharged into corresponding devices through the tail gas outlet (8), the liquid outlet (6) and the mud outlet (7) respectively after cooling. The utility model has simple equipment, high purity of liquid titanium tetrachloride, and is conducive to subsequent purification, utilization and treatment processes. When the tail gas buffer tank (2) is used, the stability of the system pressure can be guaranteed. The utility model can be used as a collecting device for general low-boiling point compounds, and is particularly suitable for being used as a collecting device when titanium tetrachloride is produced by chlorination.

Description

Titanium tetrachloride collection device

technical field

The utility model relates to a collection device, in particular to a titanium tetrachloride collection device when titanium tetrachloride is produced by using a titanium-containing raw material chlorination process.

Background technique

At present, in the process of producing titanium tetrachloride by boiling chlorination of titanium raw materials, the chlorination process of the production process of titanium tetrachloride is as follows: petroleum coke is crushed, mixed with high-titanium slag in a certain proportion to obtain a mixture, and then Put the prepared mixture into the boiling chlorination furnace, chlorine gas enters the furnace from the bottom of the chlorination furnace, under high temperature conditions, the mixture reacts with chlorine gas to generate titanium tetrachloride and other gaseous impurities, these gases pass through the chlorination furnace The top of the furnace volatilizes and escapes from the chlorination furnace, and the crude titanium tetrachloride liquid is obtained after dust removal and leaching are collected, and the slag discharged from the bottom of the furnace is returned to the titanium slag electric furnace for recycling. The crude titanium tetrachloride liquid obtained by chlorination is purified through a refining process to obtain titanium tetrachloride. In the chlorination process, the collection of titanium tetrachloride is a key technology. Since the boiling point of titanium tetrachloride is not high, about 136.4°C, it is generally collected by condensation in industry. In the prior art, titanium tetrachloride is collected by spraying on the upper part of the boiling chlorination furnace, so that the gas generated by the reaction is dedusted and cooled to 600°C-700°C, and then flows into the heat exchanger through the outlet on the top of the boiling chlorination furnace , after being cooled, it becomes a crude titanium tetrachloride liquid, which flows into the storage device to prepare for the subsequent process. The tail gas in the chlorination process is treated by the tail gas treatment system and then discharged.

Since the gas containing titanium tetrachloride coming out of the chlorination furnace is mixed with dust, etc., after cooling, there are not only liquid substances, but also muddy precipitates and a small amount of unliquefied gas. Therefore, ordinary industrial heat exchangers are currently used as four In the process of titanium chloride condensation collector, the purity of the obtained crude titanium tetrachloride liquid is not high, so the titanium content of impurities in the refining and purification process is still high, and the titanium tetrachloride in the whole production process is reduced. Yield.

Utility model content

In order to overcome the deficiency that the existing titanium tetrachloride condensation collector cannot be separated and collected, and the obtained titanium tetrachloride liquid has relatively low purity, the technical problem to be solved by the utility model is to provide a tetrachloride liquid and mud separation and collection Titanium chloride collection device.

The technical solution adopted by the utility model to solve the technical problem is: the titanium tetrachloride collecting device includes a condensation collector connected to the chlorination furnace through the air inlet, and the condensation collector is provided with a liquid outlet and an exhaust gas outlet, and the condensation is collected There is also a mud outlet on the device.

The beneficial effects of the utility model are: the equipment is simple, the purity of the titanium tetrachloride liquid is greatly improved, and corresponding purification measures or reuse can be adopted according to the different physical states of the obtained substance after cooling, which is beneficial to improving the purity of the titanium tetrachloride liquid in the entire production process. The recovery rate of titanium; when the tail gas buffer tank is used, the stability of the system pressure can be ensured, and the burden of tail gas treatment can be reduced at the same time.

Description of drawings

Fig. 1 is the schematic diagram of the utility model.

Fig. 2 is another schematic diagram of the utility model.

Marked in the figure, 1-cooling chamber, 2-exhaust gas buffer tank, 3-connecting pipe, 4-cooling jacket, 5-air inlet, 6-liquid outlet, 7-mud outlet, 8-exhaust gas outlet, 9- Tail gas discharge port, 10-secondary mud outlet, 11-spray device, 12-cooling pipe, 13-tail gas inlet, 14-liquid storage device, 15-mud storage device, 16-filter plate.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Fig. 1 and Fig. 2, the titanium tetrachloride collecting device of the present utility model comprises the condensation collector that is communicated with the chlorination furnace through the air inlet 5, and the condensation collector is provided with a liquid outlet 6 and a tail gas outlet 8, A mud outlet 7 is also arranged on the condensation collector. According to the different physical states of the titanium tetrachloride-containing gas coming out of the chlorination furnace after cooling, design multiple discharge outlets in different positions, and collect the cooled titanium tetrachloride-containing substances into different devices, which can be effectively Improve the purity of titanium tetrachloride liquid, and adopt corresponding purification measures or reuse according to the different physical states of the obtained substances after cooling, so as to increase the yield of titanium tetrachloride in the entire production process.

In order to improve the liquefaction rate of titanium tetrachloride-containing gas and facilitate classification and collection, the condensation collector can adopt a cooling chamber 1 with a cooling jacket 4 on the outer wall, and the liquid outlet 6, mud outlet 7 and tail gas outlet 8 are arranged on the cooling chamber 1 .

Further, as shown in Figure 1, in order to facilitate the collection of liquid and muddy substances, the bottom of the cooling chamber 1 adopts a cone-shaped structure with the top of the cone facing down, and the mud outlet 7 is arranged at the top of the cone-shaped structure. The storage device 15 is connected so that the mud is not easy to deposit at the bottom of the condensation collector 1, and the muddy matter containing titanium tetrachloride can be collected in the mud storage device 15 for reuse; the liquid outlet 6 is arranged at the bottom of the mud outlet 7. The position is connected with the liquid storage device 14, and the titanium tetrachloride liquid obtained after cooling can be collected in the liquid storage device 14 through the liquid outlet 6, and the titanium tetrachloride content is higher in the liquid obtained after precipitation, It is convenient for purification in the subsequent process.

The cooling chamber 1 can also adopt a structure in which a filter plate 16 is arranged at the bottom to separate mud and liquid. The mud outlet 7 is arranged on the upper side of the filter plate 16, and the liquid outlet 6 is arranged on the lower side of the filter plate 16. The filter plate 16 should be arranged obliquely, and the mud outlet 7 can be arranged at the low point on the upper side of the filter plate 16 to connect with the mud storage device 15, thereby facilitating the outflow of mud, and the liquid outlet 6 is arranged on the filter plate 16 The bottom of the cooling chamber 1 on the lower side is connected with the liquid storage device 14 .

The liquid storage device 14 and the mud storage device 15 are respectively provided with outlets according to the requirements of subsequent processing procedures and connected with corresponding processing devices.

Because the gas outlet is arranged on the top of the device in general collecting devices, the tail gas outlet 8 of the condensation collector of the present utility model should also be arranged on the top of the condensation collector. As shown in Figure 1, the tail gas outlet 8 is arranged in the cooling chamber 1 the top of. And in order to increase the condensing stroke that contains titanium tetrachloride gas, air inlet 5 is arranged on the middle part or the lower part of cooling chamber 1, and air inlet 6 is higher than liquid outlet 6 and mud outlet 7, to reduce air inlet resistance as far as possible and guarantee Condensation travel is limited.

In order to further increase the liquefaction rate of the gas containing titanium tetrachloride, thereby increasing the yield of titanium tetrachloride, a supplementary cooling device is arranged in the cooling chamber 1 .

As shown in Fig. 1, described supplementary cooling device can adopt cooling pipe 12, and described cooling pipe 12 can adopt the structural form of serpentine pipe, makes the gas containing titanium tetrachloride at the top in cooling chamber 1 and cooling pipe 12 The cooling liquid flowing inside takes place sufficient heat exchange to achieve the effect of supplementary cooling. The cooling liquid can be any liquid with a melting point lower than 0°C, such as ethylene glycol, saturated aqueous solution of calcium chloride, and the like.

As shown in Figure 2, the described supplementary cooling device can also adopt spraying device 11, and there can be one or more spraying devices 11, and spraying device 11 is connected in the liquid storage device 14 through pipeline, promptly utilizes the already cooled The obtained titanium tetrachloride-containing liquid is used to cool the titanium tetrachloride-containing gas, thereby improving the liquefaction rate of the titanium tetrachloride-containing gas without increasing the difficulty of subsequent processes such as refining and purification.

Furthermore, as shown in FIG. 1 and FIG. 2 , the condensation collector is connected to the tail gas buffer tank 2 through the tail gas outlet 8 . Compared with the original way that the tail gas is directly discharged from the chlorination furnace, due to the existence of the tail gas buffer tank 2, the pressure in the chlorination furnace can be more stable, which is more conducive to maintaining a reasonable and efficient reaction environment in the furnace.

In addition, a secondary mud outlet 10 may be provided on the tail gas buffer tank 2 , and the secondary mud outlet 10 is connected to a mud storage device 15 . In the tail gas buffer tank 2, part of the tail gas is still liquefied to form secondary mud containing titanium tetrachloride, and the secondary mud outlet 10 is provided to collect the secondary mud, which can further increase the yield of titanium tetrachloride.

The tail gas buffer tank 2 should generally be provided with a tail gas discharge port 9, and be connected with the tail gas treatment system through the tail gas discharge port 9, and the tail gas discharge port 9 should be arranged on the top of the tail gas buffer tank 2.

In order to increase the liquefaction rate of exhaust gas, the exhaust gas inlet 13 of the exhaust buffer tank 2 is set at the bottom of the exhaust buffer tank 2 higher than the secondary mud outlet 10, so as to increase the tail gas condensation stroke.

Utilize the titanium tetrachloride collection device of the present utility model, after cooling, the titanium tetrachloride-containing gas from the chlorination furnace is discharged into the corresponding device through the tail gas outlet 8, the liquid outlet 6 and the mud outlet 7 respectively, that is, the tail gas passes through The tail gas outlet 8 enters the tail gas treatment device, and the liquid containing titanium tetrachloride obtained after cooling is collected into the liquid storage device 14 through the liquid outlet 6, and the slurry-like substance containing titanium tetrachloride is collected into the mud storage through the mud outlet 7 device 15.

When the condensation collector 1 is used in connection with the tail gas buffer tank 2, the titanium tetrachloride-containing gas from the chlorination furnace is cooled and discharged to the tail gas buffer tank 2, liquid outlet 8, liquid outlet 6 and mud outlet 7 respectively. In the storage device 14 and the mud storage device 15 , the secondary mud in the tail gas buffer tank 2 is discharged into the mud storage device 15 through the secondary mud outlet 10 .

The utility model has simple equipment, and the purity of the liquid titanium tetrachloride is higher, which is beneficial to simplify the follow-up process, and can ensure the stability of the system pressure while collecting.

Example 1:

As shown in Figure 1, the temperature from the chlorination furnace is 500? After the titanium tetrachloride-containing gas enters the cooling chamber 1, it is cooled into a liquid and a slurry due to the effect of the cooling jacket 4 on the outer layer of the cooling chamber 1; in the cooling jacket 4, the cooling water is used as the medium, and the cooling water flow rate The cooling water outlet temperature is about 30°C; the top of the cooling chamber 1 is provided with a cooling pipe 12 as a supplementary cooling device, and the cooling pipe 12 is cooled by circulating ethylene glycol with a melting point temperature lower than -10°C. The outlet temperature of diol is about 10°C, and the non-liquefied titanium tetrachloride gas is further cooled and liquefied after contacting the cooling pipe 12 at the top of the cooling chamber 1; the tetrachloride gas remaining in the cooling chamber 1 in liquid form Titanium enters the liquid storage device from the liquid outlet 6, and the titanium tetrachloride left in the cooling chamber 1 in the form of mud enters the mud storage device from the mud outlet 7, and the tail gas enters the tail gas buffer tank 2 through the tail gas outlet 8, and is further liquefied and collected. After titanium chloride slurry, the remaining tail gas goes to the tail gas treatment system.

Example 2:

As shown in Figure 2, after the titanium tetrachloride gas containing titanium tetrachloride at 500°C from the chlorination furnace enters the cooling chamber 1, it is cooled into liquid and muddy matter due to the cooling jacket 4 on the outer layer of the cooling chamber 1; The cooling jacket 4 uses cooling water as the medium, the cooling water flow rate is 500kg/h, and the cooling water outlet temperature is about 30°C; the top of the cooling chamber 1 is equipped with a spray device 11 as a supplementary cooling device, and the spray device 11 sprays Spray titanium tetrachloride liquid with a temperature of -5°C, and the flow rate is 50kg/h. The unliquefied titanium tetrachloride gas is further cooled after contacting the cold titanium tetrachloride liquid sprayed from the top of the cooling chamber 1. Liquefaction; the titanium tetrachloride left in the cooling chamber 1 in liquid form enters the liquid storage device from the liquid outlet 6, and the titanium tetrachloride remaining in the cooling chamber 1 enters the mud storage device from the mud outlet 7 in the form of mud, and the tail gas then Enter the tail gas buffer tank 2 through the tail gas outlet 8, and after further liquefying and collecting the titanium tetrachloride-containing mud, the remaining tail gas goes to the tail gas treatment system.

Claims (10)

1. Titanium tetrachloride collection device, comprises the condensation collector that is communicated with chlorination furnace by air inlet (5), is provided with liquid outlet (6) and tail gas outlet (8) on the condensation collector, is characterized in that: condensation A mud outlet (7) is also arranged on the collector. 2. titanium tetrachloride collection device as claimed in claim 1, is characterized in that: condensation collector (1) adopts the cooling chamber (1) that outer wall is provided with cooling jacket (4), liquid outlet (6), mud The outlet (7) and the tail gas outlet (8) are arranged on the cooling chamber (1). 3. The titanium tetrachloride collection device as claimed in claim 2, characterized in that: the bottom of the cooling chamber (1) adopts a cone-shaped structure with the top of the cone facing down, and the mud outlet (7) is arranged at the top of the cone-shaped structure , the liquid outlet (6) is arranged at a position higher than the mud outlet (7). 4. titanium tetrachloride collecting device as claimed in claim 2, is characterized in that: cooling chamber (1) bottom is provided with filter plate (16), and mud outlet (7) is arranged on the upper side of filter plate (16), The liquid outlet (6) is arranged on the underside of the filter plate (16). 5. The titanium tetrachloride collecting device as claimed in claim 2, 3 or 4, characterized in that: the air inlet (5) is arranged in the middle or the bottom of the cooling chamber (1), and the air inlet (6) is higher than Liquid outlet (6) and mud outlet (7). 6. The titanium tetrachloride collecting device as claimed in claim 2, 3 or 4, characterized in that: a supplementary cooling device is arranged in the cooling chamber (1). 7. The titanium tetrachloride collecting device as claimed in claim 6, characterized in that: the supplementary cooling device is a cooling pipe (12) and/or a spraying device (11). 8. The titanium tetrachloride collecting device as claimed in claim 1, 2, 3 or 4, characterized in that: the condensation collector is connected with the tail gas buffer tank (2) through the tail gas outlet (8). 9. The titanium tetrachloride collecting device according to claim 8, characterized in that: the tail gas buffer tank (2) is provided with a secondary mud outlet (10). 10. titanium tetrachloride collecting device as claimed in claim 8 is characterized in that: the tail gas inlet (13) of tail gas buffer tank (2) is arranged on the bottom of tail gas buffer tank (2) higher than secondary mud outlet (10) position.

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