CN219368336U - Rotary kiln material cooling device for producing sulfuric acid process titanium dioxide - Google Patents
Rotary kiln material cooling device for producing sulfuric acid process titanium dioxide Download PDFInfo
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- CN219368336U CN219368336U CN202320346779.7U CN202320346779U CN219368336U CN 219368336 U CN219368336 U CN 219368336U CN 202320346779 U CN202320346779 U CN 202320346779U CN 219368336 U CN219368336 U CN 219368336U
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Abstract
The utility model belongs to the technical field of titanium dioxide production, and relates to a rotary kiln material cooling device for producing titanium dioxide by a sulfuric acid method, which comprises a rotary kiln, a hot air pipeline, an air-cooled cooler, a draught fan, a water-cooled cooler, a water inlet pipeline, a water outlet pipeline, a screw conveyor, a raw water tank and a transfer tank; the material discharging pipe of the rotary kiln is communicated with the feed inlet of the air-cooled cooler, the material discharging pipe of the air-cooled cooler is communicated with the feed inlet of the water-cooled cooler, and the material discharging pipe of the water-cooled cooler is communicated with the feed inlet of the screw conveyor; the air inlet of the air-cooled cooler is communicated with the atmosphere in the external environment, the exhaust pipe of the air-cooled cooler is communicated with the air inlet of the induced draft fan, and the air outlet of the induced draft fan is communicated with the combustion chamber of the rotary kiln through a hot air pipeline. The device is used by serially connecting the air-cooled cooler and the water-cooled cooler, so that the material temperature of the high-capacity rotary kiln can be reduced more efficiently, the energy conservation and consumption reduction are realized, and the occupied space of the cooling device is reduced.
Description
Technical Field
The utility model belongs to the technical field of titanium dioxide production, and particularly relates to a rotary kiln material cooling device for producing titanium dioxide by a sulfuric acid method.
Background
Titanium dioxide is one of the most important inorganic pigments and chemical raw materials, and the industrial production method thereof is generally divided into a sulfuric acid method and a chlorination method. When the titanium dioxide is produced by the sulfuric acid method, the purposes of dehydration, desulfurization and crystal form conversion of the meta-titanic acid filter cake are achieved by increasing the temperature of the materials in the calcination process, so that the meta-titanic acid filter cake is converted into titanium dioxide, the temperature of a semi-finished product of the titanium dioxide is up to 1000 ℃, and the temperature of the semi-finished product of the titanium dioxide is required to be reduced to 50-60 ℃ before entering a post-treatment process.
The common material cooling modes are divided into two types: air-cooled cooling and water-cooled cooling. The air-cooled cooling mode adopts an air-cooled cooler, takes air at normal temperature as a heat exchange medium, and utilizes the temperature difference between materials and air to transfer heat contained in the materials to the air, so that the purpose of reducing the temperature is achieved; the water-cooled cooling mode adopts a water-cooled cooler, water is used as a heat exchange medium, and the temperature difference between materials and water is utilized to realize heat transfer so as to achieve the aim of cooling. The two cooling modes can achieve the purpose of reducing the temperature of materials, but the heat taken away by air due to air-cooled cooling can be reused by the rotary kiln, so that energy sources can be saved, and the rotary kiln is widely popularized and used.
However, in practical production application, the air-cooled cooler for cooling the semi-finished product materials is longer in length and more in occupied space, and the air-cooled cooler also needs to ensure the cooling effect of the materials along with lengthening and widening along with the expansion of the kiln body of the rotary kiln and the improvement of productivity, so that the air-cooled cooler occupies more space and reduces the utilization rate of the space of the production site.
Therefore, how to reduce the occupied space of a cooling device and improve the field utilization rate while ensuring the cooling effect of the semi-finished titanium dioxide is a problem which needs to be solved by the technicians in the field.
Disclosure of Invention
The utility model aims to solve the technical problems and provides the rotary kiln material cooling device for producing the titanium dioxide by the sulfuric acid method, so that the space occupied by the cooling device is reduced and the field utilization rate is improved while the cooling effect of the semi-finished titanium dioxide is ensured.
The technical proposal is as follows: the rotary kiln material cooling device for producing the sulfuric acid process titanium dioxide comprises a rotary kiln, a hot air pipeline, an air-cooled cooler, a draught fan, a water-cooled cooler, a water inlet pipeline, a water outlet pipeline, a screw conveyor, a raw water tank and a transfer tank; the material discharging pipe of the rotary kiln is communicated with the feed inlet of the air-cooled cooler, the material discharging pipe of the air-cooled cooler is communicated with the feed inlet of the water-cooled cooler, and the material discharging pipe of the water-cooled cooler is communicated with the feed inlet of the screw conveyor; the air inlet of the air-cooled cooler is communicated with the atmosphere in the external environment, the exhaust pipe of the air-cooled cooler is communicated with the air inlet of the induced draft fan, the air outlet of the induced draft fan is communicated with the combustion chamber of the rotary kiln through a hot air pipeline, the water outlet of the raw water tank is communicated with the water inlet of the water-cooled cooler through a water inlet pipeline, a water feeding pump is arranged on the water inlet pipeline, the water outlet of the water-cooled cooler is communicated with the inlet of the transfer tank through a water outlet pipeline, the outlet of the transfer tank is connected with a boiler water supplementing pipeline, and a water supplementing pump is arranged on the boiler water supplementing pipeline.
It can be understood that the shell of hot air pipe, outlet conduit, boiler moisturizing pipeline and draught fan in this application all wraps up there is the heat preservation outside, and is equipped with corresponding support frame on each pipeline, sets up the heat preservation and is used for reducing heat loss to guarantee the security that the device used.
Preferably, the heat exchange mode of the air and the materials in the air-cooled cooler is indirect heat exchange so as to recycle hot air, the air-cooled cooler adopts a rotary drum structure, and the material discharging pipe of the rotary kiln, the air discharging pipe of the air-cooled cooler and the material discharging pipe of the air-cooled cooler are respectively in rotary and sealing connection with the cylinder body of the air-cooled cooler. When the rotary kiln is used, the material with the temperature of 900-1100 ℃ in the rotary kiln is sent into the air-cooled cooler by the material discharging pipe of the rotary kiln, and the material is conveyed to the discharge end of the air-cooled cooler along with the rotation of the cooling cylinder body of the air-cooled cooler, so that the material and cold air in the air chamber of the air-cooled cooler are subjected to heat exchange, and the material is cooled to below 250 ℃.
Preferably, the heat exchange mode of water and material in the water-cooled cooler is indirect heat exchange, the water-cooled cooler adopts a rotary drum structure, and can directly adopt a mature drum slag cooler device in the market to realize efficient heat exchange of the material, a discharge pipe of the air-cooled cooler and a discharge pipe of the water-cooled cooler are respectively and hermetically connected with a cylinder of the water-cooled cooler, and a water inlet pipeline and a water outlet pipeline are respectively and hermetically connected with a water inlet pipe and a water outlet pipe in the cylinder of the water-cooled cooler through rotary joints.
Preferably, the water-cooled cooler adopts a tube array type indirect heat exchange mode, the cooling medium adopts desalted water, and the tube array material adopts stainless steel so as to ensure the high-efficiency and long-period safe operation of the water-cooled cooler.
Preferably, the induced draft fan adopts high temperature resistant induced draft fan that Shanghai and Xin electromechanical technology limited company produced, and concrete model can select the type according to the hot air temperature that air-cooled cooler designed to guarantee the long-period safe operation of device.
The utility model also comprises other components which can be used for the normal use of the rotary kiln material cooling device for producing titanium dioxide by sulfuric acid method, which are conventional means in the field, and in addition, the undefined devices or components in the utility model, such as rotary kiln, air-cooled cooler, water-cooled cooler, screw conveyor, raw water tank, transfer tank and the like, all adopt the prior art in the field, and the technical personnel in the field can select the specification and model of the corresponding components or devices according to the actual needs.
The working principle of the utility model is as follows: the method comprises the steps of firstly, feeding the outlet materials of the rotary kiln into an air-cooled cooler to indirectly exchange heat with air in an air chamber of the air-cooled cooler, enabling the temperature of the materials to be reduced to below 250 ℃, enabling hot air after heat exchange to be reused in a combustion chamber, saving natural gas consumption in the combustion chamber, enabling the materials discharged by the air-cooled cooler to enter the water-cooled cooler again to indirectly exchange heat with desalted water, enabling desalted water to be reused for boiler water supplement after heat exchange, and enabling the materials to be fed into a next working procedure to be treated through a screw conveyor. In order to ensure the safety and the service life of the water-cooled cooler, the feeding temperature of the water-cooled cooler is less than or equal to 250 ℃ and the water inlet temperature is less than or equal to 30 ℃.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the air-cooled cooler and the water-cooled cooler are used in series, so that the material temperature of the high-capacity rotary kiln can be reduced more efficiently, and the occupied space of a cooling device is reduced; on the other hand, the heat generated after the heat exchange of the air-cooled cooler and the water-cooled cooler is recycled, so that the energy waste is reduced, the purposes of saving energy, reducing consumption and improving the space utilization rate of the production site are realized, and the method has great significance in the field of titanium dioxide production by a sulfuric acid method.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model in an embodiment.
Detailed Description
The technology of the present utility model will be described in further detail with reference to the accompanying drawings and detailed description.
Examples:
as shown in fig. 1, the rotary kiln material cooling device for producing titanium pigment by sulfuric acid method provided by the embodiment comprises a rotary kiln 1, a hot air pipeline 2, an air-cooled cooler 3, a draught fan 4, a water-cooled cooler 5, a water inlet pipeline 6, a water outlet pipeline 7, a screw conveyor 8, a raw water tank 9 and a transfer tank 10; the material discharging pipe 11 of the rotary kiln is communicated with the feed inlet of the air-cooled cooler, the material discharging pipe 12 of the air-cooled cooler is communicated with the feed inlet of the water-cooled cooler, and the material discharging pipe 13 of the water-cooled cooler is communicated with the feed inlet of the screw conveyor; the air inlet of the air-cooled cooler is communicated with the atmosphere in the external environment, the exhaust pipe 14 of the air-cooled cooler is communicated with the air inlet of the induced draft fan, the air outlet of the induced draft fan is communicated with the combustion chamber of the rotary kiln through a hot air pipeline, the water outlet of the raw water tank is communicated with the water inlet of the water-cooled cooler through a water inlet pipeline, a water feeding pump 15 is arranged on the water inlet pipeline, the water outlet of the water-cooled cooler is communicated with the inlet of the transfer tank through a water outlet pipeline, the outlet of the transfer tank is connected with a boiler water supplementing pipeline 16, and a water supplementing pump 17 is arranged on the boiler water supplementing pipeline.
It can be understood that the shell of hot air pipe, outlet conduit, boiler moisturizing pipeline and draught fan in this application all wraps up outside having heat preservation (not shown in the figure), and is equipped with corresponding support frame (not shown in the figure) on each pipeline, sets up the heat preservation and is used for reducing heat loss to guarantee the security that the device used.
In this embodiment, the heat exchange manner of the air and the material in the air-cooled cooler is indirect heat exchange so as to recycle the hot air, and the air-cooled cooler adopts a drum rotary structure, and the material discharging pipe of the rotary kiln, the air discharging pipe of the air-cooled cooler and the material discharging pipe of the air-cooled cooler are respectively rotated and hermetically connected with the cylinder of the air-cooled cooler. When the rotary kiln is used, the material with the temperature of 900-1100 ℃ in the rotary kiln is sent into the air-cooled cooler by the material discharging pipe, and the material is conveyed to the discharge end of the air-cooled cooler along with the rotation of the cooling cylinder body of the air-cooled cooler, so that the material is subjected to heat exchange with cold air in the air chamber of the air-cooled cooler, and is primarily cooled to below 250 ℃, on one hand, the air supply temperature of the rotary kiln is improved by utilizing the advantage of safe and efficient air heating of the air-cooled cooler, the energy consumption of a combustion chamber is saved, on the other hand, the discharge temperature of the air-cooled cooler is reasonably controlled, the length and the width of a conventional air-cooled cooler are not changed, and the primarily cooled material can be cooled more safely and efficiently in a next stage of water-cooled cooler.
Specifically, the heat exchange mode of water and material in the water-cooled cooler is indirect heat exchange, and the water-cooled cooler adopts a rotary drum structure, in this embodiment, a mature drum slag cooler device in the market is directly adopted, so as to realize efficient heat exchange of the material, a discharge pipe of the air-cooled cooler and a discharge pipe of the water-cooled cooler are respectively and hermetically connected with a cylinder of the water-cooled cooler, and a water inlet pipeline and a water outlet pipeline are respectively and hermetically connected with a water inlet pipe and a water outlet pipe in the cylinder of the water-cooled cooler through rotary connectors 18. The water-cooled cooler adopts a tube array type indirect heat exchange mode, the cooling medium adopts desalted water, and the tube array material adopts stainless steel so as to ensure the high-efficiency and long-period safe operation of the water-cooled cooler. The induced draft fan adopts a high temperature resistant induced draft fan produced by Shanghai and Xin mechanical and electrical science and technology limited company, and the temperature resistance can reach more than 300 ℃ so as to ensure the long-period safe operation of the device.
It can be understood that the undefined parts such as the rotary kiln, the air-cooled cooler, the water-cooled cooler, the screw conveyor, the raw water tank, the transfer tank and the like in this embodiment all adopt components or structures mature in the art, and those skilled in the art can select the model according to actual needs, and are not repeated here.
The working principle of the utility model is as follows: the method comprises the steps of firstly, feeding the outlet materials of the rotary kiln into an air-cooled cooler to indirectly exchange heat with air in an air chamber of the air-cooled cooler, enabling the temperature of the materials to be reduced to below 250 ℃, enabling hot air after heat exchange to be reused in a combustion chamber, saving natural gas consumption in the combustion chamber, enabling the materials discharged by the air-cooled cooler to enter the water-cooled cooler again to indirectly exchange heat with desalted water, enabling desalted water to be reused for boiler water supplement after heat exchange, and enabling the materials to be fed into a next working procedure to be treated through a screw conveyor. In order to ensure the safety and the service life of the water-cooled cooler, the feeding temperature of the water-cooled cooler is less than or equal to 250 ℃ and the water inlet temperature is less than or equal to 30 ℃.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. A rotary kiln material cooling device for producing sulfuric acid process titanium white powder, including the rotary kiln, its characterized in that: the device also comprises a hot air pipeline, an air-cooled cooler, an induced draft fan, a water-cooled cooler, a water inlet pipeline, a water outlet pipeline, a screw conveyor, a raw water tank and a transfer tank; the material discharging pipe of the rotary kiln is communicated with the feed inlet of the air-cooled cooler, the material discharging pipe of the air-cooled cooler is communicated with the feed inlet of the water-cooled cooler, and the material discharging pipe of the water-cooled cooler is communicated with the feed inlet of the screw conveyor; the air inlet of the air-cooled cooler is communicated with the atmosphere in the external environment, the exhaust pipe of the air-cooled cooler is communicated with the air inlet of the induced draft fan, the air outlet of the induced draft fan is communicated with the combustion chamber of the rotary kiln through a hot air pipeline, the water outlet of the raw water tank is communicated with the water inlet of the water-cooled cooler through a water inlet pipeline, a water feeding pump is arranged on the water inlet pipeline, the water outlet of the water-cooled cooler is communicated with the inlet of the transfer tank through a water outlet pipeline, the outlet of the transfer tank is connected with a boiler water supplementing pipeline, and a water supplementing pump is arranged on the boiler water supplementing pipeline.
2. The rotary kiln material cooling device for producing titanium pigment by sulfuric acid process according to claim 1, characterized in that: the heat exchange mode of air and materials in the air-cooled cooler is indirect heat exchange, the air-cooled cooler adopts a rotary drum rotary structure, and the material discharging pipe of the rotary kiln, the material discharging pipe of the air-cooled cooler and the material discharging pipe of the air-cooled cooler are respectively in rotary and sealing connection with the cylinder body of the air-cooled cooler.
3. The rotary kiln material cooling device for producing titanium pigment by sulfuric acid process according to claim 1, characterized in that: the heat exchange mode of water and materials in the water-cooled cooler is indirect heat exchange, the water-cooled cooler adopts a rotary drum structure, a discharge pipe of the air-cooled cooler and a discharge pipe of the water-cooled cooler are respectively and hermetically connected with a cylinder of the water-cooled cooler, and a water inlet pipeline and a water outlet pipeline are respectively and hermetically connected with a water inlet pipe and a water outlet pipe in the cylinder of the water-cooled cooler through rotary joints.
4. The rotary kiln material cooling device for producing titanium pigment by sulfuric acid process according to claim 3, wherein: the water-cooled cooler adopts a tube array type indirect heat exchange mode, the cooling medium adopts desalted water, and the tube array material adopts stainless steel.
5. The rotary kiln material cooling device for producing titanium dioxide by sulfuric acid process according to any one of claims 1 to 4, characterized in that: the induced draft fan adopts a high temperature resistant induced draft fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320346779.7U CN219368336U (en) | 2023-02-28 | 2023-02-28 | Rotary kiln material cooling device for producing sulfuric acid process titanium dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320346779.7U CN219368336U (en) | 2023-02-28 | 2023-02-28 | Rotary kiln material cooling device for producing sulfuric acid process titanium dioxide |
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| CN219368336U true CN219368336U (en) | 2023-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320346779.7U Active CN219368336U (en) | 2023-02-28 | 2023-02-28 | Rotary kiln material cooling device for producing sulfuric acid process titanium dioxide |
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| CN (1) | CN219368336U (en) |
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- 2023-02-28 CN CN202320346779.7U patent/CN219368336U/en active Active
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