CN214371676U - Automatic kiln equipment for producing kaolin - Google Patents
Automatic kiln equipment for producing kaolin Download PDFInfo
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- CN214371676U CN214371676U CN202120143335.4U CN202120143335U CN214371676U CN 214371676 U CN214371676 U CN 214371676U CN 202120143335 U CN202120143335 U CN 202120143335U CN 214371676 U CN214371676 U CN 214371676U
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Abstract
The utility model belongs to the technical field of kaolin production facility, concretely relates to automatic kiln equipment of production kaolin. The utility model provides an automatic kiln equipment for producing kaolin, which is characterized by comprising a material conveying logistics system, a heating system and a waste heat recycling system; the material conveying logistics system comprises a feeding bin and a conveying pipe, the heating system is arranged on the outer wall of the conveying pipe, and the waste heat recovery system is connected with the conveying pipe. The utility model provides a pair of automatic kiln equipment of production kaolin adopts full electric energy drive and heating, need not to discharge any poison gas, and energy-concerving and environment-protective reduces use cost, reduces the enterprise burden, can create bigger economic benefits when keeping sanitation.
Description
Technical Field
The utility model belongs to the technical field of kaolin production facility, concretely relates to automatic kiln equipment of production kaolin.
Background
The crushed kaolin mineral is subjected to a complete thermal process (commonly known as roasting) from normal temperature to about 1000 ℃ to complete a series of physical and chemical processes such as dehydration, organic impurity decomposition and oxidation, microstructure reforming, energizing and activation and the like, so that the kaolin mineral becomes an important chemical raw material, and is widely applied to cement, refractory materials, building ceramics and chemical industries.
The traditional large-scale production roasting is equipped with two types, namely an intermittent production kiln and a continuous production kiln, if coal is used as fuel in the intermittent production roasting kiln, the ore materials contained in a sagger and briquette coal blocks are stacked in a large-scale kiln chamber at intervals according to the design requirement (just like a traditional brick-fired kiln), and the roasting of the ore is completed through the heat supply of the coal combustion in the kiln chamber; if fuel oil or fuel gas is used as fuel for supplying heat, usually, a fuel oil burner or a fuel gas burner is arranged at a reasonable position on the inner wall of the kiln chamber, and the heat is supplied by the combustion of the fuel oil or the fuel gas to finish the roasting of the minerals. A continuous roasting kiln is generally characterized in that a roasting kiln chamber is built into a long and narrow tunnel, fuel oil or fuel gas nozzles with different densities are designed and installed on two sides of the tunnel according to the temperature requirement of a roasting process, a temperature field with gradient distribution is formed in the tunnel, a rail trolley or a carrier roller for a sagger containing mineral materials to run in the tunnel is built at the bottom of the tunnel, the sagger containing the mineral materials sequentially and continuously runs from an inlet to an outlet of the tunnel, and roasting is completed in a gradient distribution temperature field in a gradient manner, and the continuous roasting kiln is commonly called as a tunnel kiln in the industry.
The existing technology and the technical carrier thereof, namely kiln equipment, have obvious objective defects, and the summary is as follows: (1) fossil fuel energy is used. The combustion of fossil fuels has a great emission (greenhouse gases, dust and fly ash residue emissions), if the emissions cannot be processed, the emissions do not conform to the national environmental regulations, if the emissions are processed to reach the standards, the costs are high, the profit of the product tends to zero, and enterprises cannot survive. (2) The working environment of the staff is severe. The saggars for containing mineral materials are all open during working, dust raising and scattering occur at any time during loading and unloading, and the probability of silicosis occupational diseases generated by practitioners even if the workers have good labor protection is very high. The stack set up by the plant for the combustion system is very heavy. Increasingly, the method is incompatible with national labor regulations and environmental protection regulations. (3) The energy utilization rate is low. The method is characterized in that firstly, the roasting of minerals is completed at high temperature, high-temperature materials need to be cooled to normal temperature and then packaged and delivered out of a factory, and waste heat is inconvenient to collect and utilize due to the non-continuous logistics mode of sagger charging; secondly, the saggars need to absorb heat every time when participating in the working process, so that the energy consumption is increased, and the waste heat is inconvenient to recycle when the saggars are cooled; combustion-supporting air needs to be supplemented continuously in the combustion of the fossil fuel, combustion products such as steam, carbon dioxide and nitrogen oxide, and the gas itself needs to absorb heat and then can transfer heat to products through convection, conduction or radiation modes, but the kiln structure enables the gas to still have high temperature before being discharged, namely, more heat is contained, and the direct discharge leads to energy loss and low waste heat utilization rate. (4) The degree of automation is low. The sagger is used for containing mineral materials and pouring products out of the sagger by operators, and sagger kiln loading and unloading of the chamber kiln are manually finished. The physical parameters of the working operation of the kiln, such as temperature, pressure, etc., require real-time monitoring and adjustment by skilled workers. The labor cost is too high.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides an automatic kiln equipment for producing kaolin, which comprises a material conveying and logistics system, a heating system and a waste heat recycling system; the material conveying logistics system comprises a feeding bin and a conveying pipe, the heating system is arranged on the outer wall of the conveying pipe, and the waste heat recovery system is connected with the conveying pipe.
Preferably, the conveying pipe is a material flow channel for conveying materials, a physical and chemical reaction container for mineral materials and a kiln chamber of the kiln.
As an optimal technical scheme, the material conveying pipe is obliquely arranged, and the included angle between the material conveying pipe and the horizontal direction is 1-30 degrees. The included angle between the conveying pipe and the horizontal direction is set according to the repose angle of the mineral particle powder in the conveying pipe.
As a preferred technical scheme, the conveying pipeline comprises a feeding hole, a spiral feeder, a spiral discharging machine and a discharging hole; the feed inlet sets up the higher one end of conveying pipeline, the spiral feeder with the spiral discharge machine sets up inside the conveying pipeline, the discharge gate sets up the lower one end of conveying pipeline.
As a preferred technical scheme, the feeding bin is connected with the feeding hole.
As a preferred technical scheme, the heating system comprises a cylindrical heater, and the cylindrical heater is designed in a modular structure. Preferably, the cylindrical heater is designed in a HALF-wave (HALF) shape.
As a preferred technical scheme, the waste heat recovery system comprises an exhaust gas condensing heat exchanger, a first waste heat exchanger and a second waste heat exchanger.
As a preferred technical scheme, the waste gas condensation heat exchanger is arranged at the top end of the conveying pipeline, the first waste heat exchanger is arranged at the tail part of the conveying pipeline, and the second waste heat exchanger is arranged below the first waste heat exchanger.
As a preferred technical scheme, a condensing oil pipe is arranged inside the first waste heat exchanger.
As a preferred technical scheme, a switch valve is arranged between the first waste heat exchanger and the second waste heat exchanger. Preferably, the switch valve is a gate valve.
As a preferred technical scheme, the system also comprises an automatic control system, wherein the control system comprises a central processing unit, a digital temperature control instrument, a power regulator and a variable-frequency speed regulating motor; the central processing unit regulates and controls the digital temperature control instrument, the power regulator and the variable frequency speed regulating motor.
Has the advantages that:
(1) the utility model provides a pair of automatic kiln equipment of production kaolin adopts full electric energy drive and heating, need not to discharge any poison gas, and energy-concerving and environment-protective reduces use cost, reduces the enterprise burden, can create bigger economic benefits when keeping sanitation.
(2) Use the utility model discloses the time, the full flow of production process all goes on in the closed environment, can not cause any dust to discharge operational environment, can not cause the harm to practitioner's health.
(3) Through setting up waste heat recovery system, the heat that reuse heating needs and the heat of ore body granule powder self carry out recycle to the by-product and the waste gas that produce in the production process simultaneously, and the resource is practiced thrift to the at utmost.
(4) The automatic control system realizes complete automatic control, adopts an artificial intelligent digital temperature control instrument to carry out continuous PID automatic regulation and control on regional temperature, adopts the silicon controlled rectifier and the power regulator as accurate execution devices to realize a stable and accurate temperature control target, and reduces extra energy consumption caused by process fluctuation. The spiral propellers all adopt variable frequency speed regulating motors, and the control and the temperature control of the variable frequency speed regulating motors realize the combined self-consistent control. The intellectualization of the whole thermal process is realized.
Drawings
Fig. 1 is a schematic structural view of an automated kiln equipment for producing kaolin according to the present invention;
FIG. 2 is a schematic left side view of the structure;
wherein, the device comprises a feeding bin 1, a material conveying pipe 2, a material inlet 3, a spiral feeder 4, a spiral discharging machine 5, a material outlet 6, a cylindrical heater 7, an exhaust gas condensing heat exchanger 8, a first waste heat exchanger 9, a second waste heat exchanger 10, a condensing oil pipe 11 and a switch valve 12.
Detailed Description
The disclosure may be further understood in conjunction with the following detailed description of preferred embodiments of the invention and the examples included.
When describing embodiments of the present application, the use of "preferred," "preferably," "more preferred," etc., refers to embodiments of the invention that may provide certain benefits under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. In addition, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
The utility model provides an automatic kiln equipment for producing kaolin, which comprises a material conveying and logistics system, a heating system and a waste heat recycling system; the material conveying logistics system comprises a feeding bin and a conveying pipe, the heating system is arranged on the outer wall of the conveying pipe, and the waste heat recovery system is connected with the conveying pipe.
Preferably, the conveying pipe is a material flow channel for conveying materials, a physical and chemical reaction container for mineral materials and a kiln chamber of the kiln.
In some preferred embodiments, the feed delivery pipe is arranged obliquely, and an included angle between the feed delivery pipe and the horizontal direction is 1-30 degrees. The included angle between the conveying pipe and the horizontal direction is set according to the repose angle of the mineral particle powder in the conveying pipe.
The inclined arrangement of the conveying pipe is intended to fully utilize the self fluidity (repose angle index) of the mineral particle powder to save the power of a propeller, namely energy, and to enhance the power of convection of gas generated in the thermal process of the mineral particle powder to the high end direction of the conveying pipe, so that most of heat is uniformly transferred to the powder before the gas with higher temperature escapes from the conveying pipe through a mineral particle powder layer, the powder is uniformly supplied with heat, and the waste heat recovery efficiency is obvious.
In some preferred embodiments, the conveying pipe comprises a feeding hole, a spiral feeder, a spiral discharging machine and a discharging hole; the feed inlet sets up the higher one end of conveying pipeline, the spiral feeder with the spiral discharge machine sets up inside the conveying pipeline, the discharge gate sets up the lower one end of conveying pipeline.
Mineral particle powder flows into the conveying pipe from the feeding bin through the feeding hole, flows to the low end by being pushed by a spiral feeding machine arranged at the high end, continues to flow to the low end by being pulled by a spiral discharging machine arranged at the low end, and flows out of the conveying pipe to enter the receiving bin of the waste heat recovery heat exchanger when flowing to the discharging hole. And in the tube pass of the steel tube from the high-end feeding hole to the low-end discharging hole, a gas exhaust port is arranged right above the steel tube according to the area range corresponding to the temperature of the completion of various decomposition reactions in the roasting process of the mineral materials, and a drainage tube is welded, so that the drainage tube is externally connected with a gas collector and a waste heat recycling heat exchanger conveniently.
The spiral blade type material propelling mode enables the materials to be continuously turned over, copied and stirred to be transferred forwards, and the uniform heating efficiency of the materials is greatly improved due to the motion state.
In some preferred embodiments, the feed bin is connected to the feed inlet.
In some preferred embodiments, the heating system comprises a cylindrical heater that is of modular structural design. Preferably, the cylindrical heater is designed in a HALF-wave (HALF) shape. Is convenient for installation and factory manufacture. The resistance wire heating element is supported by a high-temperature structural ceramic piece. The heating element back lining ceramic fiber refractory material is insulated from the heat insulating material, so that the heating efficiency is improved.
In some preferred embodiments, the waste heat recovery system comprises an exhaust gas condensing heat exchanger, a first waste heat exchanger and a second waste heat exchanger.
In some preferred embodiments, the exhaust gas condensing heat exchanger is arranged at the top end of the conveying pipeline, the first waste heat exchanger is arranged at the tail part of the conveying pipeline, and the second waste heat exchanger is arranged below the first waste heat exchanger.
The produced gas (by-product) in the roasting process is discharged from a tube side exhaust port of the kiln tube and is butted with a water medium heat exchanger, and the heat capacity of the produced gas is exchanged and used for preheating raw materials at an outlet of a raw ore storage bin. The produced gas is changed from a high-temperature gas state to a low-temperature gas state or a greasy fluid state, the gas is discharged through adsorption treatment, and the fluid (organic components with complex components) is collected and then is treated in a centralized way (generally used as fuel).
In some preferred embodiments, the first waste heat exchanger is internally provided with a condensation oil pipe. The finished product is taken out of the kiln in a continuous high-temperature state, the high-temperature powder contains abundant heat, the discharge port is butted with a heat exchanger taking high-temperature heat conducting oil as a heat exchange medium, and the heat capacity of the high-temperature product is exchanged to be used for evaporating and preheating the moisture of the original mineral material
In some preferred embodiments, a switch valve is arranged between the first waste heat exchanger and the second waste heat exchanger. Preferably, the switch valve is a gate valve.
In some preferred embodiments, the system further comprises an automatic control system, wherein the control system comprises a central processing unit, a digital temperature control instrument, a power regulator and a variable frequency speed regulating motor; the central processing unit regulates and controls the digital temperature control instrument, the power regulator and the variable frequency speed regulating motor. The regional temperature of the kiln tube pass of the kiln is required to be differentially controlled according to the process progress requirements of mineral materials, so that all regional temperatures are continuously PID (proportion integration differentiation) automatically regulated and controlled by adopting an artificial intelligent digital temperature control instrument, a silicon controlled rectifier and a power regulator are adopted as accurate execution devices to realize a stable and accurate temperature control target, and the extra energy consumption caused by process fluctuation is reduced. The spiral propellers all adopt variable frequency speed regulating motors, and the control and the temperature control of the variable frequency speed regulating motors realize the combined self-consistent control. The intellectualization of the whole thermal process is realized.
Examples
The technical solution of the present invention is described in detail below with reference to the embodiments, but the scope of the present invention is not limited to the embodiments.
Example 1
An automatic kiln device for producing kaolin comprises a material conveying logistics system, a heating system and a waste heat recycling system; the material conveying logistics system comprises a feeding bin 1 and a conveying pipe 2, the heating system is arranged on the outer wall of the conveying pipe 2, and the waste heat recovery system is connected with the conveying pipe 2. The conveying pipeline 2 is obliquely arranged, and an included angle between the conveying pipeline 2 and the horizontal direction is 7 degrees. The material conveying pipe comprises a material inlet 3, a spiral feeder 4, a spiral discharging machine 5 and a material outlet 6; the feed inlet 3 is arranged at the higher end of the feed delivery pipe 2, the spiral feeder 4 and the spiral discharging machine 5 are arranged inside the feed delivery pipe 2, and the discharge outlet 6 is arranged at the lower end of the feed delivery pipe 2. The feeding bin 1 is connected with the feeding port 3. The heating system comprises a cylindrical heater 7, and the cylindrical heater 7 is designed in a modular structure. The waste heat recovery system comprises a waste gas condensing heat exchanger 8, a first waste heat exchanger 9 and a second waste heat exchanger 10. The waste gas condensation heat exchanger is arranged at the top end of the conveying pipeline 2, the first waste heat exchanger 9 is arranged at the tail part of the conveying pipeline 2, and the second waste heat exchanger 10 is arranged below the first waste heat exchanger 9. And a condensing oil pipe 11 is arranged in the first waste heat exchanger 9. A gate valve 12 is arranged between the first waste heat exchanger 9 and the second waste heat exchanger 10. The automatic control system comprises a central processing unit, a digital temperature control instrument, a power regulator and a variable-frequency speed regulating motor; the central processing unit regulates and controls the digital temperature control instrument, the power regulator and the variable frequency speed regulating motor.
Example 2
An automatic kiln device for producing kaolin comprises a material conveying logistics system, a heating system and a waste heat recycling system; the material conveying logistics system comprises a feeding bin 1 and a conveying pipe 2, the heating system is arranged on the outer wall of the conveying pipe 2, and the waste heat recovery system is connected with the conveying pipe 2. The conveying pipeline 2 is obliquely arranged, and an included angle between the conveying pipeline 2 and the horizontal direction is 7 degrees. The material conveying pipe comprises a material inlet 3, a spiral feeder 4, a spiral discharging machine 5 and a material outlet 6; the feed inlet 3 is arranged at the higher end of the feed delivery pipe 2, the spiral feeder 4 and the spiral discharging machine 5 are arranged inside the feed delivery pipe 2, and the discharge outlet 6 is arranged at the lower end of the feed delivery pipe 2. The feeding bin 1 is connected with the feeding port 3. The heating system comprises a cylindrical heater 7, and the cylindrical heater 7 is designed in a modular structure. The waste heat recovery system comprises a waste gas condensing heat exchanger 8, a first waste heat exchanger 9 and a second waste heat exchanger 10. The waste gas condensation heat exchanger is arranged at the top end of the conveying pipeline 2, the first waste heat exchanger 9 is arranged at the tail part of the conveying pipeline 2, and the second waste heat exchanger 10 is arranged below the first waste heat exchanger 9. And a condensing oil pipe 11 is arranged in the first waste heat exchanger 9. A gate valve 12 is arranged between the first waste heat exchanger 9 and the second waste heat exchanger 10.
It should be finally noted that the above only serves to illustrate the technical solution of the present invention, and not to limit the scope of the present invention, and that simple modifications or equivalent replacements performed by those skilled in the art to the technical solution of the present invention do not depart from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. An automatic kiln device for producing kaolin is characterized by comprising a material conveying logistics system, a heating system and a waste heat recycling system; the material conveying logistics system comprises a feeding bin (1) and a conveying pipe (2), the heating system is arranged on the outer wall of the conveying pipe (2), and the waste heat recycling system is connected with the conveying pipe (2).
2. The automated kiln equipment for producing kaolin as claimed in claim 1, wherein the conveying pipe (2) is arranged obliquely, and the included angle between the conveying pipe (2) and the horizontal direction is 1-30 degrees.
3. The automated kiln equipment for producing kaolin according to claim 1 or 2, characterized in that the conveying pipe comprises a feed inlet (3), a screw feeder (4), a screw discharger (5), a discharge outlet (6); the feeding hole (3) is formed in the higher end of the conveying pipe (2), the spiral feeder (4) and the spiral discharging machine (5) are arranged inside the conveying pipe (2), and the discharging hole (6) is formed in the lower end of the conveying pipe (2).
4. An automated kiln plant for the production of kaolin according to claim 3, characterized in that the feed bin (1) is connected to the feed inlet (3).
5. An automated kiln plant for the production of kaolin, according to claim 1, characterized in that said heating system comprises a cylindrical heater (7), said cylindrical heater (7) being of modular structural design.
6. The automated kiln plant for the production of kaolin according to claim 1, characterized in that said waste heat recovery and utilization system comprises an exhaust gas condensation heat exchanger (8), a first waste heat exchanger (9), a second waste heat exchanger (10).
7. The automated kiln plant for producing kaolin according to claim 6, characterized in that said exhaust gas condensation heat exchanger is arranged at the top end of said conveyor pipe (2), said first residual heat exchanger (9) is arranged at the tail of said conveyor pipe (2), and said second residual heat exchanger (10) is arranged below said first residual heat exchanger (9).
8. The automated kiln plant for the production of kaolin according to claim 7, characterized in that the first residual heat exchanger (9) is internally provided with a condensation oil pipe (11).
9. The automated kiln plant for the production of kaolin according to claim 7, characterized in that between the first residual heat exchanger (9) and the second residual heat exchanger (10) there is provided a switch valve (12).
10. The automated kiln equipment for producing kaolin according to claim 1, further comprising an automatic control system, the control system comprising a central processing unit, a digital temperature control instrument, a power regulator and a variable frequency speed regulating motor; the central processing unit regulates and controls the digital temperature control instrument, the power regulator and the variable frequency speed regulating motor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120143335.4U CN214371676U (en) | 2021-01-19 | 2021-01-19 | Automatic kiln equipment for producing kaolin |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120143335.4U CN214371676U (en) | 2021-01-19 | 2021-01-19 | Automatic kiln equipment for producing kaolin |
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| CN214371676U true CN214371676U (en) | 2021-10-08 |
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| CN202120143335.4U Active CN214371676U (en) | 2021-01-19 | 2021-01-19 | Automatic kiln equipment for producing kaolin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781368A (en) * | 2021-01-19 | 2021-05-11 | 上海特赛高温技术有限公司 | Automatic kiln equipment for producing kaolin |
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2021
- 2021-01-19 CN CN202120143335.4U patent/CN214371676U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781368A (en) * | 2021-01-19 | 2021-05-11 | 上海特赛高温技术有限公司 | Automatic kiln equipment for producing kaolin |
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