CN202630710U

CN202630710U - Plasma baking furnace and ignition temperature automatic control system for rotary kiln

Info

Publication number: CN202630710U
Application number: CN 201220122791
Authority: CN
Inventors: 曲大伟; 金思峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-28
Filing date: 2012-03-28
Publication date: 2012-12-26
Anticipated expiration: 2022-03-28

Abstract

The utility model provides a control system device which is capable of carrying out automatic feedback and automatic adjustment according to temperature of a kiln head and a kiln tail of a rotary kiln, and particularly relates to an oil-free plasma ignition and baking furnace box temperature automatic detection feedback intelligent control system device for the rotary kiln with pulverized coal as fuel. According to the requirements for temperature rising of the kiln head and the kiln tail, a computer run program is written and used for carrying out computerized numerical control for the total temperature rising process. Temperature rising errors, heat preservation errors and temperature dropping errors caused by artificial misoperation can be eliminated so that the purpose of accurate temperature control is achieved. The plasma baking furnace and ignition temperature automatic control system can be applied to oil-free plasma ignition and baking a furnace in all pulverized coal kilns.

Description

Kiln plasma baker, firing temperature automatic control system

Technical field

The present invention relates to a kind of is that the kiln of fuel does not have the wet goods ion ignition, the enameling furnace bore temperature detects feedback intelligent control system automatically with the coal dust; The work of curing of the kiln furnace lining after being particularly useful for newly building by laying bricks or stones or repairing, the process of curing reaches Automatic Control according to curing " temperature curve ".

Background technology

Ignition trigger under kiln black furnace state; Must carry out according to heating curve in " temperature curve "; Especially newly the kiln furnace lining after building by laying bricks or stones or repairing; Before the operation of putting into production, must carry out 50-172 hour baking process such as intensification, insulation, cooling heating continuously, with firm intensity increase of the attaching that reaches fire proof material of furnace lining and long-lived purpose according to " temperature curve ".At present, be that kiln plasma non-oil ignition, the enameling furnace temperature control of fuel all is that main the adjustment respectively to coal dust amount and each road air feed accomplished with the manual work with the coal dust.Because the intensification cycle is long; The parameter of required adjustment is many, causes artificial adjustment to lag behind, and often causes processes such as intensification, insulation, cooling to depart from the requirement of technology heating curve; Influence kiln furnace lining quality, reduced the service life and the cycle of operation of kiln.

For the degree of accuracy that guarantees that black furnace ignition trigger and enameling furnace process curve are carried out, the utility model provide a kind of can be according to kiln hood, the kiln end temperature of kiln, feedback, controlled system with self-regulation device automatically.According to the intensification requirement of kiln hood, kiln tail, write computer runs programs whole temperature-rise period is carried out computer digital control, can get rid of improper intensification, insulation, the cooling mistake of causing of manual operation, reach accurately to temperature controlled purpose.

Summary of the invention

The utility model mainly is to solve; Existing in prior technology is that the kiln of raw material does not have wet goods ion ignition, enameling furnace often because human factor causes intensification, insulation, cooling to depart from technological requirement, the problem that causes kiln quality and service life to reduce with the coal dust.

The utility model is able to solve through following technical proposals to above-mentioned technical problem: a kind of is that the kiln of fuel does not have the wet goods ion ignition, the enameling furnace bore temperature detects feedback intelligent control system automatically with the coal dust.Machine supplying powder, wind, secondary wind, plasma generator, burner, temperature sensor, temperature indicator, switch board, PLC, a computer order cable connect in equipment; Plasma generator is installed on the kiln burner; Temperature sensor is installed in the rotary kiln two ends; Temperature is fed back to temperature indicator, issue instructions to switch board automatically through PLC and computer, the powder-feeding amount of automatic article on plasma generator of switch board and machine supplying powder is regulated.

The beneficial effect that the utility model brought is; All be to adopt the control of temperature feedback closed loop in whole igniting, enameling furnace process; Computer compares adjustment according to initialize program to relevant parameter; Its adjustment temperature accurately, reliably can not cause the consequence of kiln quality problems and service life minimizing because human factor causes the heating curve deviation again.

Description of drawings

Accompanying drawing is kiln plasma baker, firing temperature automatic control system configuration schematic diagram.

Among the figure: 1. computer collection control cabinet, 2. coal dust bucket, 3. metering machine supplying powder, 4. machine supplying powder powder amount switch board, 5. plasma-arc power adjusting cabinet; 6. eddy flow wind is controlled baffle plate, 7. direct current wind control baffle plate, 8. temperature of kiln head sensor, 9. kiln end temperature sensor; 10. rotary kiln body, 11. eddy flow wind apparatus, 12 direct current wind apparatus, the 13. direct current blast flame diameter that contracts, 14. eddy flow wind flame spreading diameters; 15. pulverized coal flame, 16. plasma guns, 17. advance the powder device, 18. plasma-arcs; 19. air blast, 20. primary air fans, 21. wind control baffle plates, 22. secondary wind switch boards

The specific embodiment

Below through exemplifying embodiment, and combine accompanying drawing, the technical scheme of the utility model is further described.

In igniting of kiln black furnace and baker, start successively and give powder primary air fan 20, plasma generator 16 produces plasma-arc 18.Press setup parameter from coal dust bucket 2, metering machine supplying powder 3 and supply with coal dust; Under the carrying of a wind, supply with coal dust entering plasma-arc 18 zones through advancing powder device 17, coal dust is excited and produces fuel gas and partial combustion under the heating of plasma high-temperature electric arc.Starting 19 pairs of pulverized coal flames of overfire air fan provides the air oxygen supply and carries out the arc shape adjusting; Kiln hood, kiln end temperature rise under the heating of flame, corresponding kiln hood sensor 8, kiln tail sensor 9 detected temperatures and be delivered to computer collection control cabinet 1 to the Temperature numerical signal and compare adjustment with predefined heating curve;

The quantity of heat given up adjustment: sensor 8,9 feedback temperature signals compare to computer collection control cabinet 1 and heating curve; Issue instructions to machine supplying powder powder amount switch board 4 and plasma-arc power adjusting cabinet 5 then; Send the size that powder-feeding amount and plasma-arc power are regulated in instruction by these two switch boards; Machine supplying powder 3 increased powder-feeding amount when feedback temperature was lower than heating curve, plasma-arc 5 power increase, otherwise machine supplying powder 3 machine supplying powders reduce powder-feeding amount, plasma-arc 5 power reduce.

Temperature of kiln head adjustment: kiln hood sensor 8 feedback temperature signals and the contrast of computer temperature of kiln head curve; When temperature arrived design temperature, computer issued instructions to secondary wind switch board 22 control eddy flow wind control baffle plates 6 minimizing air quantity, direct current wind control baffle plate 7 is opened big increase air quantity, and its effect is that flame diameter reduces; The length of flame increases; Move behind the kiln hood heat that the kiln hood heat reduces and temperature no longer rises, kiln tail heat increases progressively temperature and improves, when kiln end temperature is raised to kiln end temperature curve setting temperature; Computer issues instructions to secondary wind switch board 22 control eddy flow wind control baffle plates 6 and strengthens air quantity, direct current wind control baffle plate 7 minimizing air quantity; Cause flame diameter to increase, the length of flame reduces, and consequently kiln tail heat reduces and temperature no longer rises.

When if kiln hood, kiln end temperature all reach set temperature value; Sensor 8,9 feedback temperature signals compare to computer collection control cabinet 1 and heating curve; Issue instructions to then machine supplying powder powder amount switch board 4. and plasma by arc power adjusting cabinet 5 thus cabinet send instruction and reduce powder-feeding amount and reduce by the whole like this heat of in kiln, importing of arc power, reached automatic control to the furnace heating-up process.

Claims

1. one kind is that the kiln of fuel does not have the wet goods ion ignition, the enameling furnace bore temperature detects feedback intelligent control system automatically with the coal dust, and machine supplying powder, wind, secondary wind, plasma generator, burner, temperature sensor, temperature indicator, switch board, PLC, a computer order cable connect in equipment; Plasma generator is installed on the kiln burner; Temperature sensor is installed in the rotary kiln two ends; Temperature is fed back to temperature indicator, issue instructions to switch board automatically through PLC and computer, the powder-feeding amount of automatic article on plasma generator of switch board and machine supplying powder is regulated.