CN112443754A - System and method for comprehensive utilization of chlorine gas produced by titanium dioxide produced by chlorination process - Google Patents
System and method for comprehensive utilization of chlorine gas produced by titanium dioxide produced by chlorination process Download PDFInfo
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- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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Abstract
The invention provides a system and a method for comprehensive utilization of chlorine gas produced by titanium dioxide by a chlorination process, wherein the system for comprehensive utilization of chlorine gas produced by titanium dioxide by the chlorination process comprises the following steps: the device comprises a liquid chlorine storage tank, a liquid chlorine gasification device, a chlorine buffer tank, a chlorination reaction device, a quenching device, a pressure regulating valve, a water bath chlorine heating device, an aluminum trichloride generator, a rock salt device, an oxidation reaction device, a cooling device and a gas-solid separation device; through setting up liquid chlorine gasification equipment can become gaseous to liquid chlorine, through setting up chlorine buffer tank can distribute chlorination process chlorine to retrieve the chlorine that the oxidation process produced, with the cyclic utilization that realizes the technology medium, improve the utilization ratio of chlorine, reduction in production cost.
Description
Technical Field
The invention relates to the field of metallurgy, in particular to a system and a method for comprehensive utilization of chlorine gas produced by titanium dioxide through a chlorination process.
Background
In the production of titanium dioxide and titanium sponge by chlorination process, at present, most processes firstly adopt boiling chlorination process to prepare intermediate titanium tetrachloride, and then further prepare titanium dioxide or titanium sponge by using titanium tetrachloride, and chlorine is one of the most main raw materials for boiling chlorination.
Chlorine is used as an important industrial raw material and has very wide application in industrial (especially chemical) production in China. Liquid chlorine is a low-pressure liquefied gas and belongs to dangerous goods. Therefore, how to ensure the safety of the liquid chlorine gasification in use is a very concerned problem for the majority of liquid chlorine users. The liquid chlorine is mostly discharged from the gas phase of the steel cylinder. The amount of gasified chlorine in the steel cylinder (especially in winter) sometimes cannot meet the production requirement, and a method of directly heating the steel cylinder is often adopted to accelerate gasification. The method can cause the temperature of the liquid fluorine to rise sharply, cause overpressure in the liquid chlorine steel cylinder or the buffer tank or melt the safety plug, and cause accidents. Still a considerable number of users employ cylinder liquid phase discharge methods. Chlorine gas discharged from the steel cylinder enters a gasification tank with a heating sleeve for gasification (the gasification tank belongs to three types of pressure vessels), and the jacket is usually heated by steam or hot water. The liquid chlorine in the tank can be rapidly gasified and is difficult to control due to the steam introduction; a set of hot water circulating device (such as a hot water tank, a hot water pump and the like) is added when hot water is introduced.
In the existing boiling chlorination process, the consumption of chlorine is high, the requirement on chlorine-related equipment is high, and the utilization rate of chlorine is not high
Disclosure of Invention
Aiming at the defects, the invention provides the system and the method for comprehensively utilizing chlorine gas produced by titanium dioxide through the chlorination process, so that the chlorine gas can be effectively utilized in the production engineering of titanium dioxide through the chlorination process, the loss of the chlorine gas is reduced, the chlorine gas can be applied to the production process more safely and effectively, and the utilization rate and the production efficiency of the chlorine gas are improved.
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the invention aims to provide a system for comprehensively utilizing chlorine gas produced by titanium dioxide in a chlorination process, and the system for comprehensively utilizing the chlorine gas has the advantages of high utilization rate of the chlorine gas, less loss, capability of reducing the production cost and the like.
The invention also aims to provide a method for comprehensively utilizing chlorine gas produced by titanium dioxide produced by a chlorination process.
In order to achieve the above object, a first aspect of the present invention provides a system for comprehensive utilization of chlorine gas produced by titanium dioxide through a chlorination process, where the system for comprehensive utilization of chlorine gas produced by titanium dioxide through a chlorination process comprises: the device comprises a liquid chlorine storage tank, a liquid chlorine gasification device, a chlorine buffer tank, a chlorination reaction device, a quenching device, a pressure regulating valve, a water bath chlorine heating device, an aluminum trichloride generator, a rock salt device, an oxidation reaction device, a cooling device and a gas-solid separation device;
the liquid chlorine storage tank is provided with a first liquid chlorine outlet and a first liquid chlorine inlet;
the liquid chlorine gasification device is provided with a second liquid chlorine inlet and a second chlorine outlet; the second liquid chlorine inlet is connected with the first liquid chlorine outlet;
the chlorine buffer tank is provided with a third chlorine inlet and a third chlorine outlet; the third chlorine inlet is connected with the second chlorine outlet;
the chlorination reaction device is provided with a fourth chlorine gas inlet and a first mixed gas outlet; the fourth chlorine inlet is connected with the third chlorine outlet;
the quenching device is provided with a first mixed gas inlet, a pentachlorinated gas inlet and a second mixed gas outlet;
the water bath chlorine gas heating device is provided with a sixth chlorine gas inlet and a fourth chlorine gas outlet; the sixth chlorine inlet is connected with the second chlorine outlet, and a pressure regulating valve is arranged on a pipeline connecting the sixth chlorine inlet with the second chlorine outlet;
the aluminum trichloride generator is provided with a seventh chlorine gas inlet and a third mixed gas outlet; the seventh chlorine inlet is connected with the fourth chlorine outlet;
the oxidation reaction device is provided with a second mixed gas inlet, a rock salt inlet, an eighth chlorine inlet, a ninth chlorine inlet and a third mixed gas outlet; the second mixed gas inlet is connected with the third mixed gas outlet; the rock salt inlet, the eighth chlorine inlet and the ninth chlorine inlet are all connected with the fourth chlorine outlet, and a rock salt device is further arranged on a pipeline connecting the rock salt inlet and the fourth chlorine outlet;
the cooling device is provided with a third mixed gas inlet and a material outlet; the third mixed gas inlet is connected with the third mixed gas outlet;
the gas-solid separation device is provided with a material inlet, a fifth mixed gas outlet and a material outlet; the material inlet is connected with the material outlet, and the fifth mixed gas outlet is connected with the chlorine buffer tank.
According to the system for comprehensively utilizing chlorine gas produced by titanium dioxide through a chlorination process, the liquid chlorine gas can be converted into gas through the liquid chlorine gasification device, the chlorine gas buffer tank is arranged, the chlorine gas in the chlorination process can be distributed, and the chlorine gas generated in the oxidation process is recovered, so that the cyclic use of process media is realized, the utilization rate of the chlorine gas is improved, and the production cost is reduced.
According to one embodiment of the invention, the heating temperature T1 of the water bath chlorine gas heating device is 50-70 ℃, and the flow rate V1 of chlorine gas input into the water bath chlorine gas heating device is controlled by the pressure regulating valve to satisfy the following conditions: V1/T1 ═ 0.001m3/s·℃～0.01m3/s·℃。
According to one embodiment of the invention, the cooling temperature of the quenching device is-5 ℃ to 10 ℃.
The second aspect of the invention provides a method for comprehensive utilization of chlorine gas produced by titanium dioxide through a chlorination process, which is applied to any one of the systems for comprehensive utilization of chlorine gas produced by titanium dioxide through a chlorination process, and the method for comprehensive utilization of chlorine gas produced by titanium dioxide through a chlorination process comprises the following steps:
s10, gasifying the liquid chlorine through a liquid chlorine gasifying device, and distributing the gasified chlorine to a chlorination process and an oxidation process;
s20, sending the gasified chlorine distributed to the chlorination process in the step S10 to a chlorine buffer tank, and outputting and distributing the chlorine to a chlorination reaction device and a quenching device through the chlorine buffer tank;
s21, sending the mixed gas generated in the chlorination reaction device to a quenching device for cooling;
s30, sending the gasified chlorine distributed to the oxidation process in the step S10 to a chlorine water bath heating device;
s31, dividing the chlorine gas heated by the water bath in the step 30 into four paths, sending the first path to an aluminum trichloride generator to generate an aluminum trichloride mixed gas, and sending the generated aluminum trichloride mixed gas to an oxidation reaction device; the second path is used as rock salt feeding carrier gas, and rock salt in the rock salt device is sent to the oxidation reaction device; the third path and the fourth path are directly sent to an oxidation reaction device to be used as gas curtain protection;
and S32, conveying the material generated by the reaction of the oxidation reactor to a cooling device for cooling, conveying the cooled material to a gas-solid separation device for gas-solid separation, and conveying the separated gas to a chlorine buffer tank.
According to one embodiment of the present invention, in step S10, the ratio of the gas distributed to the oxidation step and the chlorination step is 1: 1.5-2.
According to an embodiment of the present invention, in step S20, the ratio of the gas distributed to the chlorination reaction device and the quenching device is 1:2 to 2.5, and the cooling temperature of the quenching device is-5 ℃ to 10 ℃.
According to one embodiment of the present invention, in step S31, the chlorine gas is distributed to the first path, the second path, the third path and the fourth path in a ratio of 3:1:2:2, and the chlorine gas in the third path and the fourth path is sent to different areas in the oxidation reaction apparatus.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a system and a method for comprehensive utilization of chlorine gas produced by titanium dioxide by a chlorination process according to an embodiment of the present invention.
Reference numerals:
1 liquid chlorine storage tank, 2 first liquid chlorine outlet, 3 second liquid chlorine inlet, 4 liquid chlorine gasification device, 5 second chlorine outlet, 6 third chlorine inlet, 7 chlorine buffer tank, 8 third chlorine outlet, 9 fifth chlorine inlet, 10 fourth chlorine inlet, 11 chlorination reaction device, 12 quenching device, 13 second mixed gas outlet, 14 pressure regulating valve, 15 sixth chlorine inlet, 16 water bath chlorine heating device, 17 fourth chlorine outlet, 18 seventh chlorine inlet, 19 aluminum trichloride generator, 20 third mixed gas outlet, 21 second mixed gas inlet, 22 rock salt device, 23 rock salt inlet, 24 oxidation reaction device, 25 fourth mixed gas outlet, 26 first liquid chlorine inlet, 27 first mixed gas outlet, 28 first mixed gas inlet, 30 eighth chlorine inlet, 31 ninth chlorine inlet, 32 third mixed gas inlet, 33 cooling device, 34 material outlet, 35 material inlet, 36 gas-solid separation device, 37 fifth mixed gas outlet and 38 material outlet
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. As used herein, "the" is intended to include the plural forms, including "at least one" unless the content clearly indicates otherwise. "at least one" is not to be construed as limiting "one" or "an". The terms "comprises," "comprising," "includes" and/or "including" specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The use of "first," "second," and similar terms in the present disclosure does not denote any order, quantity, or importance, but rather the components are distinguished. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The system for comprehensive utilization of chlorine gas produced by titanium dioxide by a chlorination process according to the embodiment of the invention is described below with reference to FIG. 1. As shown in figure 1 of the drawings, in which,
the system for chlorine comprehensive utilization in the production of titanium dioxide by a chlorination process comprises: the device comprises a liquid chlorine storage tank 1, a liquid chlorine gasification device 4, a chlorine buffer tank 7, a chlorination reaction device 11, a quenching device 12, a pressure regulating valve 14, a water bath chlorine heating device 16, an aluminum trichloride generator 19, a rock salt device 22, an oxidation reaction device 24, a cooling device 33 and a gas-solid separation device 36;
the liquid chlorine storage tank 1 is provided with a first liquid chlorine outlet 2 and a first liquid chlorine inlet 26;
the liquid chlorine gasification device 4 is provided with a second liquid chlorine inlet 3 and a second chlorine outlet 5; the second liquid chlorine inlet 3 is connected with the first liquid chlorine outlet 2; the liquid chlorine in the liquid chlorine storage tank 1 is sent to a liquid chlorine gasification device 4, and is gasified into a gaseous state in the liquid chlorine gasification device 4. The gasified chlorine is output from a second chlorine outlet 5 and distributed to a chlorination process and an oxidation process; wherein the chlorination process comprises a chlorine buffer tank 7, a chlorination reaction device 11 and a quenching device 12;
the chlorine buffer tank 7 is provided with a third chlorine inlet 6 and a third chlorine outlet 8; the third chlorine inlet 6 is connected with the second chlorine outlet 5; the chlorine distributed to the chlorination process is temporarily stored in a chlorine buffer tank 7, and then a third chlorine outlet 8 is arranged to output to a chlorination reaction device 11 and a quenching device 12.
The chlorination reaction device 11 is provided with a fourth chlorine gas inlet 10 and a first mixed gas outlet 27; the fourth chlorine inlet 10 is connected with the third chlorine outlet 8; the chlorination reaction state is used for chlorination reaction when preparing titanium tetrachloride as an intermediate in the chlorination-process titanium dioxide production process, and gas and residual chlorine generated after the chlorination reaction are discharged through a first mixed gas outlet 27 and are sent to a quenching device 12.
The quenching device 12 is provided with a first mixed gas inlet 28, a fifth chlorine gas inlet 9 and a second mixed gas outlet 13; the quenching device 12 is used for rapidly cooling the mixed gas generated by the chlorination reaction device 11, and simultaneously, part of chlorine gas output by the chlorine buffer tank 7 enters the quenching device 12, and the part of chlorine gas has lower temperature, and can rapidly reduce the temperature of the mixed gas after being mixed with the mixed gas generated by the chlorination reaction device 11, so that the cooling efficiency of the quenching device 12 is further improved; the cooled mixed gas can be conveyed to a chlorine liquefying device through a second mixed gas outlet 13 to extract chlorine in the mixed gas and return the chlorine to the liquid chlorine storage tank 1, so that the cyclic use of a process medium is realized, and the utilization rate of the chlorine is improved.
The oxidation process in the system for comprehensive utilization of chlorine in titanium dioxide production by chlorination process provided by the embodiment of the invention comprises a water bath chlorine heating device 16, an aluminum trichloride generator 19, a rock salt device 22, an oxidation reaction device 24, a cooling device 33 and a gas-solid separation device 36;
the water bath chlorine gas heating device 16 is provided with a sixth chlorine gas inlet 15 and a fourth chlorine gas outlet 17; the sixth chlorine inlet 15 is connected with the second chlorine outlet 5, and a pressure regulating valve 14 is arranged on a pipeline connecting the sixth chlorine inlet 15 and the second chlorine outlet 5; the chlorine gas sent to the oxidation step from the liquid chlorine vaporizer 4 is first heated to 50 to 70 ℃ in a water bath heater. A pressure regulating valve 14 is also arranged on the pipeline connecting the sixth chlorine inlet 15 and the second chlorine outlet 5 and is used for controlling the flow rate of the gas input into the water bath heating device. The chlorine gas heated by the water bath is divided into four paths, the first path is sent to an aluminum trichloride generator 19 for preparing aluminum trichloride, and the second path is used as rock salt feeding carrier gas for sending rock salt in a rock salt device 22 to an oxidation reaction device 24; the third and fourth paths are directly sent to the oxidation reaction device 24 for gas curtain protection;
the aluminum trichloride generator 19 is provided with a seventh chlorine gas inlet 18 and a third mixed gas outlet 20; the seventh chlorine inlet 18 is connected with the fourth chlorine outlet 17; the aluminum trichloride generator 19 is used for preparing aluminum trichloride, and the generated aluminum trichloride mixed gas is conveyed to the oxidation reaction device 24 through the third mixed gas outlet 20.
The oxidation reaction state is used for the vapor phase oxidation of titanium tetrachloride in the titanium dioxide production process by the chlorination method; the oxidation reaction device 24 is provided with a second mixed gas inlet 21, a rock salt inlet 23, an eighth chlorine inlet 30, a ninth chlorine inlet 31 and a third mixed gas outlet 20; the second mixed gas inlet 21 is connected with the third mixed gas outlet 20; the rock salt inlet 23, the eighth chlorine inlet 30 and the ninth chlorine inlet 31 are all connected with the fourth chlorine outlet 17, and a rock salt device 22 is further arranged on a pipeline connecting the rock salt inlet 23 and the fourth chlorine outlet 17; the rock salt device 22 is used for inputting rock salt into a pipeline connecting the rock salt inlet 23 and the fourth chlorine gas outlet 17, and the rock salt is sent to the oxidation reaction device 24 through chlorine gas flowing in the pipeline to participate in oxidation reaction;
the chlorine gas heated by the water bath chlorine gas heating device 16 is also sent to different areas in the oxidation reaction device 24 through the eighth chlorine gas inlet 30 and the ninth chlorine gas inlet 31 to be used as a gas curtain protection.
The cooling device 33 is provided with a third mixed gas inlet 32 and a material outlet 34; the third mixed gas inlet 32 is connected to the third mixed gas outlet 20; the cooling device 33 and the third mixed gas outlet 20 of the oxidation reaction device 24 are used for cooling the mixed gas output by the third mixed gas outlet 20;
the gas-solid separation device 36 is provided with a material inlet 35, a fifth mixed gas outlet 37 and a material outlet 38; the material inlet 35 is connected with the material outlet 34, and the fifth mixed gas outlet 37 is connected with the chlorine buffer tank 7. The gas-solid separation device 36 is connected with the material outlet 34 of the cooling device 33, the mixed gas cooled by the cooling device 33 realizes gas-solid separation in the gas-solid separation device 36, the separated solid material is discharged through the material discharge port 38, the separated gas is conveyed to the chlorine buffer tank 7, and chlorine in the gas can be used for chlorination reaction participating in a chlorination process, so that the cyclic use of a process medium is realized, and the production cost is further reduced.
According to the system for comprehensively utilizing chlorine gas produced by titanium dioxide through a chlorination process, the liquid chlorine gas can be converted into gas through the liquid chlorine gasification device 4, the chlorine gas generated in the chlorination process can be distributed through the chlorine gas buffer tank 7, and the chlorine gas generated in the oxidation process is recovered, so that the cyclic use of process media is realized, the utilization rate of the chlorine gas is improved, and the production cost is reduced.
According to one embodiment of the invention, the heating temperature T1 of the water bath chlorine heating device 16 is 50-70 ℃, and the flow rate V1 of chlorine gas input into the water bath chlorine heating device 16 is controlled by the pressure regulating valve 14 to satisfy the following conditions: V1/T1 ═ 0.001m3/s·℃～0.01m3s.degree.C. The gas flow rate input into the water bath chlorine gas heating device 16 is controlled, and the heating temperature of the water bath chlorine gas heating device 16 is matched to heat the chlorine gas to 50-70 ℃, so that the subsequent preparation efficiency of the aluminum trichloride and the oxidation efficiency in the oxidation reaction device 24 are improved.
According to one embodiment of the present invention, the cooling temperature of the quenching device 12 is-5 ℃ to 10 ℃.
The second aspect of the invention provides a method for comprehensive utilization of chlorine gas produced by titanium dioxide through a chlorination process, which is applied to any one of the systems for comprehensive utilization of chlorine gas produced by titanium dioxide through a chlorination process, and the method for comprehensive utilization of chlorine gas produced by titanium dioxide through a chlorination process comprises the following steps:
s10, gasifying the liquid chlorine by the liquid chlorine gasifying device 4, and distributing the gasified chlorine gas to the chlorination step and the oxidation step;
s20, sending the gasified chlorine gas distributed to the chlorination process in the step S10 to a chlorine buffer tank 7, and outputting and distributing the chlorine gas to a chlorination reaction device and a quenching device 12 through the chlorine buffer tank 7;
s21, sending the mixed gas generated in the chlorination reaction device to a quenching device 12 for cooling;
s30, sending the gasified chlorine gas distributed to the oxidation process in the step S10 to a chlorine water bath heating device 16;
s31, dividing the chlorine gas heated by the water bath in the step 30 into four paths, wherein the first path is sent to an aluminum trichloride generator 19 to generate an aluminum trichloride mixed gas, and the generated aluminum trichloride mixed gas is sent to an oxidation reaction device 24; the second path is used as rock salt feeding carrier gas, and rock salt in the rock salt device 22 is sent to the oxidation reaction device 24; the third and fourth paths are directly sent to the oxidation reaction device 24 for gas curtain protection;
and S32, conveying the material generated by the reaction of the oxidation reactor to a cooling device 33 for cooling, conveying the cooled material to a gas-solid separation device 36 for gas-solid separation, and conveying the separated gas to a chlorine buffer tank 7.
According to one embodiment of the present invention, in step S10, the ratio of the gas distributed to the oxidation step and the chlorination step is 1: 1.5-2.
According to one embodiment of the present invention, in step S20, the ratio of the gas distributed to the chlorination reaction device 11 and the quenching device 12 is 1:2 to 2.5, and the cooling temperature of the quenching device 12 is-5 ℃ to 10 ℃. The mixed gas output by the chlorination reaction device can be quickly cooled by controlling the proportion of the chlorine gas input into the quenching device, so that the mixed gas is cooled to-5-10 ℃. The subsequent chlorine recovery and tail gas treatment are facilitated.
According to one embodiment of the present invention, in step S31, the chlorine gas is distributed to the first, second, third and fourth paths in a ratio of 3:1:2:2, and the chlorine gas in the third and fourth paths is sent to different areas of the oxidation reaction apparatus 24. The demand of preparing aluminum trichloride is met by controlling the distribution proportion of chlorine gas for water bath heating, and meanwhile, driving gas can be provided for the input of rock salt; the chlorine gas in the third path and the chlorine gas in the fourth path are sent to different areas in the oxidation reaction device 24, so that gas curtain protection can be provided for gas phase oxidation in the oxidation reaction device 24, and the utilization rate of the chlorine gas is greatly improved.
Although terms such as liquid chlorine storage tank, liquid chlorine gasification apparatus, chlorine buffer tank, chlorination reaction apparatus, quenching apparatus, pressure regulating valve, water bath chlorine gas heating apparatus, aluminum trichloride generator, rock salt apparatus, oxidation reaction apparatus, cooling apparatus, and gas-solid separation apparatus are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A system for chlorine comprehensive utilization in titanium dioxide production by a chlorination process is characterized in that: the system for chlorine comprehensive utilization in the production of titanium dioxide by a chlorination process comprises: the device comprises a liquid chlorine storage tank, a liquid chlorine gasification device, a chlorine buffer tank, a chlorination reaction device, a quenching device, a pressure regulating valve, a water bath chlorine heating device, an aluminum trichloride generator, a rock salt device, an oxidation reaction device, a cooling device and a gas-solid separation device;
the liquid chlorine storage tank is provided with a first liquid chlorine outlet and a first liquid chlorine inlet;
the liquid chlorine gasification device is provided with a second liquid chlorine inlet and a second chlorine outlet; the second liquid chlorine inlet is connected with the first liquid chlorine outlet;
the chlorine buffer tank is provided with a third chlorine inlet and a third chlorine outlet; the third chlorine inlet is connected with the second chlorine outlet;
the chlorination reaction device is provided with a fourth chlorine gas inlet and a first mixed gas outlet; the fourth chlorine inlet is connected with the third chlorine outlet;
the quenching device is provided with a first mixed gas inlet, a pentachlorinated gas inlet and a second mixed gas outlet;
the water bath chlorine gas heating device is provided with a sixth chlorine gas inlet and a fourth chlorine gas outlet; the sixth chlorine inlet is connected with the second chlorine outlet, and a pressure regulating valve is arranged on a pipeline connecting the sixth chlorine inlet with the second chlorine outlet;
the aluminum trichloride generator is provided with a seventh chlorine gas inlet and a third mixed gas outlet; the seventh chlorine inlet is connected with the fourth chlorine outlet;
the oxidation reaction device is provided with a second mixed gas inlet, a rock salt inlet, an eighth chlorine inlet, a ninth chlorine inlet and a third mixed gas outlet; the second mixed gas inlet is connected with the third mixed gas outlet; the rock salt inlet, the eighth chlorine inlet and the ninth chlorine inlet are all connected with the fourth chlorine outlet, and a rock salt device is further arranged on a pipeline connecting the rock salt inlet and the fourth chlorine outlet;
the cooling device is provided with a third mixed gas inlet and a material outlet; the third mixed gas inlet is connected with the third mixed gas outlet;
the gas-solid separation device is provided with a material inlet, a fifth mixed gas outlet and a material outlet; the material inlet is connected with the material outlet, and the fifth mixed gas outlet is connected with the chlorine buffer tank.
2. The system for comprehensive utilization of chlorine gas produced by titanium dioxide through chlorination process according to claim 1, characterized in that: the heating temperature T1 of the water bath chlorine gas heating device is 50-70 ℃, and the chlorine flow rate V1 input into the water bath chlorine gas heating device is controlled by the pressure regulating valve to meet the following requirements: V1/T1 ═ 0.001m3/s·℃～0.01m3/s·℃。
3. The system for producing condensed TiCl4 mixed gas by using titanium dioxide through chlorination process as claimed in claim 1, wherein: the cooling temperature of the quenching device is-5 ℃ to 10 ℃.
4. A method for comprehensive utilization of chlorine gas produced by titanium dioxide through a chlorination process is applied to the system for comprehensive utilization of chlorine gas produced by titanium dioxide through a chlorination process according to any one of claims 1 to 3, and is characterized in that: the method for comprehensively utilizing chlorine gas produced by titanium dioxide produced by chlorination process comprises the following steps:
s10, gasifying the liquid chlorine through a liquid chlorine gasifying device, and distributing the gasified chlorine to a chlorination process and an oxidation process;
s20, sending the gasified chlorine distributed to the chlorination process in the step S10 to a chlorine buffer tank, and outputting and distributing the chlorine to a chlorination reaction device and a quenching device through the chlorine buffer tank;
s21, sending the mixed gas generated in the chlorination reaction device to a quenching device for cooling;
s30, sending the gasified chlorine distributed to the oxidation process in the step S10 to a chlorine water bath heating device;
s31, dividing the chlorine gas heated by the water bath in the step 30 into four paths, sending the first path to an aluminum trichloride generator to generate an aluminum trichloride mixed gas, and sending the generated aluminum trichloride mixed gas to an oxidation reaction device; the second path is used as rock salt feeding carrier gas, and rock salt in the rock salt device is sent to the oxidation reaction device; the third path and the fourth path are directly sent to an oxidation reaction device to be used as gas curtain protection;
and S32, conveying the material generated by the reaction of the oxidation reactor to a cooling device for cooling, conveying the cooled material to a gas-solid separation device for gas-solid separation, and conveying the separated gas to a chlorine buffer tank.
5. The method for comprehensive utilization of chlorine gas produced by titanium dioxide through chlorination process according to claim 4, which is characterized in that: in step S10, the ratio of the gas distributed to the oxidation step and the chlorination step is 1: 1.5-2.
6. The method for comprehensive utilization of chlorine gas produced by titanium dioxide through chlorination process according to claim 9, wherein the method comprises the following steps: in step S20, the ratio of the gas distributed to the chlorination reaction device and the quenching device is 1: 2-2.5, and the cooling temperature of the quenching device is-5 ℃ to 10 ℃.
7. The method for comprehensive utilization of chlorine gas produced by titanium dioxide through chlorination process according to claim 4, which is characterized in that: in step S31, the ratio of the chlorine gas distributed to the first, second, third and fourth paths is 3:1:2:2, and the chlorine gas in the third and fourth paths is sent to different areas in the oxidation reaction apparatus.
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