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The petroleum coke is used as a raw material, and after a first-stage crushing and strong grinding, powders of a certain specification are prepared, and the fuel is delivered to a dedicated burner through a total storage tank, a material distribution system, a metering control system, and a powder delivery system, etc. Industrial process conditions and requirements of the furnace, fuel quantification from the burner and continuous, uniform and stable combustion, the resulting high-intensity heat for the effective melting of the kiln materials, and ultimately produce a variety of products meet the quality requirements. The technology includes two forms of combustion delivery: high pressure systems, low pressure systems. Among them, the low-voltage system has less investment, short construction period, and quick results, but the control accuracy is relatively poor. The investment in high-pressure systems is relatively high and the construction period is slightly longer, but the system is perfect and the degree of automation is high. Users can choose according to their own requirements.
Glass bottle kiln new wave: petroleum coke powder instead of fuel
A petroleum coke instead of heavy oil combustion technology
Sunlight Furnace Energy Saving & Environmental Protection Technology Co., Ltd. developed and applied after several years of time, and successfully applied petroleum coke powder instead of fuel glass kiln combustion, which greatly reduced the production costs of production companies.
In the production of glass with fuel as the heat source, the cost of fuel consumption is higher in the cost of glass. Petroleum coke dry powder replaces fuel oil without changing the structure of the glass kiln and without affecting normal production. It will undergo technological transformation and greatly reduce production costs. It has achieved considerable economic benefits in many glass plants.
In the second half of 2005, a float glass plant started to use petroleum coke powder, initially using a low-pressure system, and exploring and evolving to a high-pressure system through numerous trials. Now it has been used by a number of customers and has achieved good results, with significant economic benefits and energy saving. The effect can be as high as 20%-40%.
two. System working principle
1. Working principle: This technology combines the requirements of the glass kiln and adopts the principle of pneumatic conveying. The petroleum coke is made into powder with certain granularity. Special equipment is used to mix it with compressed air into a certain proportion of fluidized solid-gas two-phase fluid. , sprayed into the kiln by pipe injection.
2. System classification and composition:
(1) The composition of the low-pressure system is relatively simple, consisting of a hopper, a feeding device, a mixing conveyor, and a reversing pipe.
(2) High-pressure system It is composed of silo, sending equipment, mixed conveying equipment, pressure regulating and pressure control pipeline, transmission control pipeline, fluidization control pipeline, purge control pipeline, weighing measurement system and automatic control system.
The low-pressure system is simple, the investment is small, and the construction period is short. Under normal circumstances, the design and construction can be completed in 45 days. Compared with the high-pressure system, the control accuracy is worse, and the small and medium-sized kiln is more adaptable.
The high-pressure system is perfect. The system is fully controlled by a computerized automatic system. The degree of automation is high, and the flame and temperature controllability is good. However, the investment is relatively large. The design and construction period is about 1-2 months. The large-scale furnace is more adaptable.
3. High-pressure system technical features:
a. Pneumatic ball valves and pneumatic control valves are widely used to provide high system operation reliability. All pneumatic valve movements are controlled by an automated system.
b. The special sending tank is used to send the powder at a constant pressure, and the powder is fully fluidized in the tank. Therefore, the material flow is continuous and uniform, the flame is stable, and the controllability is good.
c. The flow control accuracy of the powder reaches 0.1Kg/minute, which can fully meet the furnace temperature control accuracy requirements.
d. Eliminates the effect of burning effect due to coking of the spray gun when using heavy oil, and also reduces the labor intensity of the melting work.
three. Use effect and operability
When using heavy oil, the flame that meets the process requirements can be obtained by adjusting the ratio of oil, gas, and wind. When using a high-pressure injection system, it is through. The source of the Chinese bottle network has adjusted the tank pressure and delivery pressure of the delivery tank to regulate the flow of powder, and then control the temperature of the melting furnace; by adjusting the delivery gas, fluidized gas Match to control the rigidity and length of the flame. Since the pneumatic adjustment valve is adjusted by a computer, the adjustment is flexible and the operation is easy.
The ratio of calorific value of petroleum coke powder to heavy oil is (1.1-1.2). Due to the increase in the amount of fuel, the flow of the combustion air during use needs to be increased. Therefore, the kiln pressure is increased compared to the use of heavy oil. This effect is caused by the kiln. Automatic adjustment of the brake plate can be eliminated. Under normal circumstances, the opening of the kiln pressure gate increases by about 3%-5%.
Compared with the use of heavy oil, the difficulty of high-pressure system operation has increased. The first reason is that the operating habits of employees have an adaptive process, and the second is that the fluctuation of the moisture content of the powder material has an impact on its transport performance and fluidization state, thereby affecting the flame. quality. Therefore, according to the kiln operating conditions to adjust the relevant parameters.
After the two kiln production lines of the float glass plant use petroleum coke powder, their melting furnaces are small: the kiln temperature, kiln pressure, liquid level, and bubble boundary are stable, indicating that the use of petroleum coke has no adverse effect on the working conditions of the furnace. .
Reprinted: Chinese bottle net