CN217585376U - Kiln combustion system with adjustable atmosphere - Google Patents
Kiln combustion system with adjustable atmosphere Download PDFInfo
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- CN217585376U CN217585376U CN202221788212.7U CN202221788212U CN217585376U CN 217585376 U CN217585376 U CN 217585376U CN 202221788212 U CN202221788212 U CN 202221788212U CN 217585376 U CN217585376 U CN 217585376U
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Abstract
The utility model provides a kiln combustion system with adjustable atmosphere, which comprises a control system, a gas flowmeter, a gas automatic regulating valve, a gas electromagnetic valve, a combustion-supporting air flowmeter, a combustion-supporting air regulating valve, a control system, a power type burner, a gas pipeline, a combustion-supporting air pipeline and a secondary air pipeline, wherein the gas pipeline, the combustion-supporting air pipeline and the secondary air pipeline are connected with the power type burner; the utility model discloses utilize the change dynamic data of detector collection furnace temperature, oxygen content data, flame intensity data, then transmit control system in real time and compare and the analysis, the aperture of the corresponding governing valve of rethread control system adjustment, and then carry out the accurate adjustment to the gas flow of burner, the flow of combustion-supporting wind, the intensity of flame etc. makes the requirement that intensification rate, temperature homogeneity, atmosphere etc. in the stove satisfy the settlement to improve kiln heat energy control accuracy and improve the product and fire the quality.
Description
Technical Field
The utility model relates to a honeycomb ceramic fires technical field, specifically is a kiln combustion system of adjustable atmosphere.
Background
The kiln is a thermal device which enables a product to complete coupling processing of a certain temperature curve, an atmosphere curve and a pressure curve, and the heating mode of the kiln can be divided into oil heating, electric heating and gas heating according to the type of fuel. In general, natural gas is used as a raw material in large-scale kilns in the ceramic industry, and the natural gas and combustion-supporting air are fed into a burner and are ignited to heat the kilns.
The kiln combustion system generally comprises a gas valve bank, a combustion-supporting air valve bank, a pipeline, a burner and the like. In the early kiln combustion system, a self-suction burner is generally adopted, and the opening degrees of a gas valve bank and a combustion air valve bank are manually controlled to control the temperature. The self-suction type burner is also called a Venturi burner, external air is drawn to enter the burner to be mixed and combusted with natural gas through backpressure generated by natural gas flowing through the burner by utilizing an injection effect, and the flame rigidity is poor without disturbance, so that the temperature in the kiln is uneven. Meanwhile, the control mode of manually adjusting the valve group has poor precision, excessive human factors, low safety, unstable product quality and low qualification rate. With the improvement of the technology and the increase of the automation degree, the combustion system on the market generally adopts a power type burner, an automatic regulating valve, a safety shut-off valve, a controller and the like, so that the automatic control of combustion can be realized, and a more uniform temperature field and the temperature in the kiln meeting the requirements can be obtained.
However, with the iterative update of products, new products put forward more requirements on combustion systems, especially related products in the fine ceramic industry, put forward requirements on firing atmosphere, and require that the combustion atmosphere is respectively controlled to be an oxidizing atmosphere, a reducing atmosphere or a neutral atmosphere at different specified temperature sections. The existing combustion system is difficult to meet the atmosphere requirement on the premise of meeting the temperature rise rate and the temperature uniformity, and the industry development is severely restricted.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a kiln combustion system of adjustable atmosphere to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a kiln combustion system with an adjustable atmosphere comprises a control system, a power burner, a gas pipeline, a combustion-supporting air pipeline and a secondary air pipeline, wherein the gas pipeline, the combustion-supporting air pipeline and the secondary air pipeline are connected with the power burner; a gas flowmeter, a gas automatic regulating valve and a gas electromagnetic valve are sequentially connected in series between the gas pipeline and the power burner; the combustion-supporting air pipeline is communicated with an outlet of a combustion-supporting fan; a combustion-supporting air flowmeter and a combustion-supporting air adjusting valve are sequentially connected in series between the combustion-supporting air pipeline and the power type burner; an air inlet of the secondary air pipeline is communicated with the interior of the kiln, and an air outlet of the secondary air pipeline is connected with an air inlet of a secondary fan; the air outlet of the secondary fan is connected with the power type burner through a pipeline; the kiln combustion system also comprises a burner controller, wherein the burner controller is used for controlling a spark plug on the power type burner; and the control system is respectively in circuit connection with the gas flowmeter, the gas automatic regulating valve, the combustion-supporting air flowmeter and the combustion-supporting air regulating valve.
Furthermore, a secondary air adjusting valve is arranged on a pipeline connecting the secondary air fan and the power type burner, and the secondary air adjusting valve is in circuit connection with the control system.
Further, an ion flame detector is arranged on the power type burner and is in circuit connection with the control system.
Further, an oxygen content analyzer is arranged on the kiln body of the kiln and is in circuit connection with the control system.
Further, a temperature sensor is arranged on the kiln body of the kiln and used for detecting the temperature in the kiln body; the temperature sensor is in circuit connection with the control system.
Further, the control system is a PLC control unit.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses utilize the change dynamic data of detector collection furnace temperature, oxygen content data, flame intensity data, then transmit control system in real time and compare and the analysis, the aperture of the corresponding governing valve of rethread control system adjustment, and then carry out the accurate adjustment to the gas flow of burner, the flow of combustion-supporting wind, the intensity of flame etc. makes the requirement that intensification rate, temperature homogeneity, atmosphere etc. in the stove satisfy the settlement to improve kiln heat energy control accuracy and improve the product and fire the quality.
Drawings
FIG. 1 is an overall structure diagram of the present invention;
in the figure: the device comprises a control system 1, a gas flowmeter 2, a gas automatic regulating valve 3, a gas electromagnetic valve 4, a burner controller 5, an oxygen content analyzer 6, a temperature sensor 7, an ion flame detector 8, a power burner 9, a combustion-supporting fan 10, a combustion-supporting air flowmeter 11, a combustion-supporting air regulating valve 12, a secondary fan 13, a secondary air regulating valve 14, a secondary air pipeline 15, a combustion-supporting air pipeline 16 and a gas pipeline 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, an atmosphere-adjustable kiln combustion system includes a control system 1, a power burner 9, and a gas pipeline 17, a combustion-supporting air pipeline 16 and a secondary air pipeline 15 connected to the power burner 9; a gas flowmeter 2, a gas automatic regulating valve 3 and a gas electromagnetic valve 4 are also sequentially connected in series between the gas pipeline 17 and the power burner 9; the combustion-supporting air pipeline 16 is communicated with the outlet of the combustion-supporting fan 10; a combustion-supporting air flowmeter 11 and a combustion-supporting air adjusting valve 12 are also sequentially connected in series between the combustion-supporting air pipeline 16 and the power burner 9; an air inlet of the secondary air pipeline 15 is communicated with the inside of the kiln, and an air outlet of the secondary air pipeline is connected with an air inlet of the secondary fan 13; the air outlet of the secondary fan 13 is connected with the power type burner 9 through a pipeline; the kiln combustion system also comprises a burner controller 5, wherein the burner controller 5 is used for controlling a spark plug on a power burner 9; the control system 1 is respectively connected with the gas flowmeter 2, the gas automatic regulating valve 3, the combustion-supporting air flowmeter 11 and the combustion-supporting air regulating valve 12 through circuits. The control system 1 is a PLC control unit.
Furthermore, the power type burner 9 is provided with an independent secondary air port, secondary air can be introduced, the flame outlet speed of the burner under low power can be increased by adjusting the combustion in an auxiliary manner, the disturbance of a hearth is increased, and the temperature of the inner space of the furnace is more uniform. And a secondary air regulating valve 14 is arranged on a pipeline connecting the secondary fan 13 and the power type burner 9, and the secondary air regulating valve 14 is in circuit connection with the control system 1.
The power type burner 9 is provided with an ion flame detector 8, and the ion flame detector 8 is in circuit connection with the control system 1. The ionic flame detector 8 monitors the flame intensity of the burner, feeds back a current signal, and the control system 1 can take an adjusting measure when the flame intensity is low, so that the situation that the burner extinguishes because the flame intensity is too low is avoided.
An oxygen content analyzer 6 is arranged on the kiln body of the kiln, and the oxygen content analyzer 6 is in circuit connection with the control system 1; the oxygen content analyzer 6 measures the combustion atmosphere in real time.
A temperature sensor 7 is arranged on the kiln body of the kiln and used for detecting the temperature in the kiln body; the temperature sensor 7 is electrically connected to the control system 1.
When the kiln is in work, a combustion-supporting fan 10 is started firstly, a combustion-supporting air adjusting valve 12 is opened, combustion-supporting air sequentially passes through valve groups on a combustion-supporting air pipeline 16 and then enters a hearth through a power burner 9 to sweep the interior of the kiln; then the power type burner 9 is ignited, the gas electromagnetic valve 4 is opened, the gas automatic regulating valve 3 is opened, and the gas sequentially passes through the valve group on the gas pipeline 17 and enters the power type burner 9; the burner controller 5 controls a spark plug on the power burner 9 to perform ignition action, and the burner is ignited; then the secondary air fan 13 is started, the secondary air regulating valve 14 is opened, the secondary air fan 13 extracts part of smoke discharged by the hearth and enters the secondary air fan 13 through a secondary air pipeline 15 to be used as secondary air, the secondary air sequentially passes through valve groups on the pipeline and is sent into the power type burner 9, and then the combustion system starts to enter a temperature rise and atmosphere control stage.
The control system mainly comprises three control methods for atmosphere:
1. the kiln temperature and the opening of the gas regulating valve are controlled in an interlocking manner.
(1) The temperature sensor 7 acquires the actual temperature of the kiln and uploads the actual temperature to the control system 1;
(2) The control system 1 is compared with the temperature set by the system;
(3) According to the difference, PID operation is carried out, and the opening of the automatic fuel gas regulating valve 3 is correspondingly adjusted;
(4) After the opening of the gas valve is changed, the gas flow is changed along with the change of the opening of the gas valve, and the temperature of the kiln is changed along with the change of the gas flow;
(5) And the temperature sensor 7 continues to collect the temperature of the kiln, and the steps are repeated.
2. The air-fuel ratio between the gas flow and the air flow is controlled in an interlocking manner.
(1) The gas flowmeter 2 and the combustion-supporting air flowmeter 11 respectively collect the current gas flow value and the combustion-supporting air flow value and upload the current gas flow value and the combustion-supporting air flow value to the control system 1;
(2) The control system 1 calculates the current air-fuel ratio and compares the current air-fuel ratio with the air-fuel ratio set by the system;
(3) According to the difference, PID operation is carried out, and the opening degree of the combustion-supporting air adjusting valve 12 is correspondingly adjusted;
(4) After the opening of the combustion-supporting air adjusting valve 12 is changed, the flow of the combustion-supporting air is changed along with the change of the opening, and the air-fuel ratio is changed along with the change of the flow;
(5) And continuously and respectively acquiring the current gas flow value and the combustion-supporting air flow value by the gas flow meter 2 and the combustion-supporting air flow meter 11, and repeating the steps.
3. And (4) controlling the flame intensity of the burner and the secondary air flow in an interlocking manner.
(1) The ion flame detector 8 collects the current flame intensity signal and uploads the signal to the control system 1;
(2) The control system 1 compares the flame intensity value with the set flame intensity value;
(3) According to the difference, performing PID operation, and correspondingly adjusting the opening of the secondary air regulating valve 14;
(4) After the opening degree of the secondary air adjusting valve 14 is changed, the flame intensity value is changed along with the change;
(5) And continuously acquiring the current flame intensity signal, and repeating the steps.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The kiln combustion system with the adjustable atmosphere is characterized by comprising a control system (1), a power type burner (9), a gas pipeline (17), a combustion-supporting air pipeline (16) and a secondary air pipeline (15), wherein the gas pipeline (17), the combustion-supporting air pipeline (16) and the secondary air pipeline are connected with the power type burner (9); a gas flowmeter (2), a gas automatic regulating valve (3) and a gas electromagnetic valve (4) are sequentially connected in series between the gas pipeline (17) and the power burner (9); the combustion-supporting air pipeline (16) is communicated with an outlet of the combustion-supporting fan (10); a combustion-supporting air flow meter (11) and a combustion-supporting air adjusting valve (12) are sequentially connected in series between the combustion-supporting air pipeline (16) and the power burner (9); an air inlet of the secondary air pipeline (15) is communicated with the interior of the kiln, and an air outlet is connected with an air inlet of the secondary fan (13); the air outlet of the secondary fan (13) is connected with the power type burner (9) through a pipeline; the kiln combustion system also comprises a burner controller (5), wherein the burner controller (5) is used for controlling a spark plug on the power type burner (9); the control system (1) is respectively in circuit connection with the gas flowmeter (2), the gas automatic regulating valve (3), the combustion-supporting air flowmeter (11) and the combustion-supporting air regulating valve (12).
2. The kiln combustion system with the adjustable atmosphere as recited in claim 1, characterized in that a secondary air adjusting valve (14) is arranged on a pipeline connecting the secondary air fan (13) and the power type burner (9), and the secondary air adjusting valve (14) is electrically connected with the control system (1).
3. The furnace combustion system with adjustable atmosphere according to claim 1, characterized in that the dynamic burner (9) is provided with an ion flame detector (8), and the ion flame detector (8) is in circuit connection with the control system (1).
4. Furnace combustion system according to claim 1, characterised in that the furnace body is equipped with an oxygen content analyzer (6), said oxygen content analyzer (6) being in electrical connection with said control system (1).
5. An atmosphere-adjustable kiln combustion system as claimed in claim 1, characterized in that the kiln body of the kiln is provided with a temperature sensor (7) for detecting the temperature in the kiln body; the temperature sensor (7) is in circuit connection with the control system (1).
6. An atmosphere adjustable kiln combustion system according to claim 1, characterized in that the control system (1) is a PLC control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221788212.7U CN217585376U (en) | 2022-07-12 | 2022-07-12 | Kiln combustion system with adjustable atmosphere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221788212.7U CN217585376U (en) | 2022-07-12 | 2022-07-12 | Kiln combustion system with adjustable atmosphere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217585376U true CN217585376U (en) | 2022-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221788212.7U Active CN217585376U (en) | 2022-07-12 | 2022-07-12 | Kiln combustion system with adjustable atmosphere |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217585376U (en) |
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2022
- 2022-07-12 CN CN202221788212.7U patent/CN217585376U/en active Active
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