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Coking technique using coal external burning to replace gas fuel burning

A gas fuel and process technology, applied in the field of coking process, can solve the problems of large gas consumption, high heat, low calorific value, etc., and achieve the effect of rational utilization

Active Publication Date: 2008-01-09
中科合肥煤气化技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the low calorific value of producer gas, blast furnace gas or mixed gas, etc., in the case of producing the same product, the amount of gas consumed is large and the amount of waste gas generated is large, which makes the heat taken away by the exhaust gas during the coking process ( The main energy loss term) is greater

Method used

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  • Coking technique using coal external burning to replace gas fuel burning

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Effect test

Embodiment 1

[0033] The coking process of using external combustion of coal instead of combustion of gaseous fuels such as coke oven gas: the combustion unit in the coke production flow chart (Figure 1) is replaced by a combustion unit (Figure 2), which is a kind of external combustion of coal instead of coke oven gas combustion The new coking process flow chart. The operating conditions of the combustion unit are as follows: the pressure in the furnace is slightly positive, the temperature of the flue gas out of the furnace is 1400-1700 °C, and it is adjusted appropriately according to the heat exchange cycle. In order to compare the external combustion of coal instead of coke oven gas combustion process with the original process, using the same exhaust gas temperature of 278 °C, the heat balance data of the coke oven with an annual output of 2 million tons of coke are listed in Table 4. If the conversion efficiency of coal to gas fuel is 80%, the saved 360MNm 3 Coke oven gas is equivale...

Embodiment 2

[0036] A new type of coking process that combines external combustion of coal with combustion of gaseous fuels such as coke oven gas by combining partitioned wall heat exchange and regenerative heat exchange: a combustion unit (Figure 2), a regenerative waste heat recovery unit and a partitioned wall waste heat recovery unit (Fig. 3) Replacing the combustion unit, regenerative waste heat recovery unit and partition wall waste heat recovery unit in the coke production flow chart (Fig. 1) respectively, it is a new coking process that uses external combustion of coal instead of coke oven gas combustion picture. The operating conditions of the combustion unit are as follows: the pressure in the furnace is slightly positive, the temperature of the flue gas out of the furnace is 1400-1700 °C, and it is adjusted appropriately according to the heat exchange cycle. Waste heat recovery adopts the combination of regenerative heat exchanger and partition wall heat exchanger. The temperatu...

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Abstract

A coking process for substituting gas fuel combustion with coal external combustion is carried out by preheating for fired coal by waste-heat recovering unit, burning in burning unit to obtain high-temperature smoke, collecting dust for high-temperature smoke, delivering it into heat-transferring unit, discharging heat to carbonizing chamber by partition, recovering most waste heat by regenerative and dividing-wall heat exchanger and exhausting. It consists of burning unit, heat-transferring unit, regenerative waste-heat recovering unit and dividing-wall waste-heat recovering unit. The energy-saving rate reaches to 20%, it costs low and has better energy utilization. It can be used for industrial production.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a coking process which uses gas as fuel to provide high-temperature heat to the coking process. Background technique [0002] The properties of coal and gaseous fuels are different. Coal contains a large amount of harmful substances such as ash, while gaseous fuels are clean energy. It is precisely because of the quality of coal and gas fuels and the difference in energy conversion and utilization methods that the power generation efficiency of coal-fired power plants is 10-15 percentage points lower than that of natural gas combined cycle power plants. [0003] At present, in order to realize the efficient and clean utilization of coal, whether it is the chemical production process or the IGCC power generation system, the coal must be gasified first to create the necessary conditions for the further utilization of coal. However, the coal gasification process is a...

Claims

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Application Information

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IPC IPC(8): C10B21/00
CPCY02P20/129
Inventor 金红光孙士恩高林
Owner 中科合肥煤气化技术有限公司
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