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A hot stove equipment suitable for low calorific value fuel and low oxygen combustion

A low-oxygen combustion, low calorific value technology, applied in the field of coal chemical industry, can solve the problems of increased equipment investment and operating costs, low economic benefits, environmental pollution, etc., to meet the requirements of process cycle and environmental protection, improve Reynolds coefficient, increase The effect of dwell time

Active Publication Date: 2021-07-13
BEIJING HANGHUA ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD
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AI Technical Summary

Problems solved by technology

If the self-produced low calorific value gas of this device is directly discharged, it will cause great pollution to the environment, and it will be a great waste of resources to go to the torch to burn it. Post-processing will increase the investment and operating costs of the equipment, and the economic benefits are not high. Recycling as stove fuel is a perfect solution

Method used

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  • A hot stove equipment suitable for low calorific value fuel and low oxygen combustion
  • A hot stove equipment suitable for low calorific value fuel and low oxygen combustion
  • A hot stove equipment suitable for low calorific value fuel and low oxygen combustion

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Embodiment example

[0033] Implementation case: A horizontal dry hot air furnace is required in a project, requiring a total heat load 54.5mW, using a pyrolytic gas (low-temperature value) as the main fuel, natural gas as an auxiliary fuel, of which natural gas heat value 36.5 MJ / NM 3 Plenty of total, thermal solution of gas 1.458MJ / NM 3 The flow rate is 69048kg / h, which requires the hot air furnace outlet temperature control between 280 ° C to 310 ° C, containing less than 0.75 wt%, NOx 3 Co 3 After combustion calculation, furnace thermal calculation, flow field CFD simulation, temperature field simulation,

[0034] Pyrolysis of total heat load: Q 1 = 1.843MJ / NM 3 × 69048kg / h ÷ 1.186kg / nm 3 ÷ 3600 = 29.8MW

[0035] Natural gas consumption: (54.5-29.8) MW ÷ 36.5MJ / NM 3 × 3600 = 2436NM 3 / h

[0036] The furnace reducing reaction zone 4 mainly combuses natural gas, the flame diameter is 0.8-1.2m, the inner wall surface is effective in diameter 1.6m, length 1.5m, the secondary oxidation r...

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Abstract

A hot stove equipment suitable for low-calorific-value fuel and low-oxygen combustion, including a burner burner, a reduction reaction zone at a burner, a primary reduction reaction zone, a secondary oxidation reaction zone, and a mixing chamber; the burner reduction reaction zone, The primary reduction reaction zone and the secondary oxidation reaction zone constitute the combustion chamber of the equipment. The front end of the combustion chamber is equipped with a burner, and the outlet of the combustion chamber is connected to the mixing chamber; the mixing chamber is equipped with a circulating process gas inlet and hot air. Furnace outlet; the furnace head burner is provided with an auxiliary fuel gas central gun inlet, an auxiliary fuel gas outer ring gun inlet and a first-stage combustion-supporting air inlet. The invention realizes the complete combustion of large-flow, low-calorific-value, and low-pressure gas under low-oxygen conditions, meets the temperature and oxygen content requirements of outlet mixed flue gas, and discharges NOx and VOC below national emission standards, while taking into account good operating performance of the equipment.

Description

Technical field [0001] The present invention relates to the field of coal chemical technology, with a primary fuel, heating inert circulating gas to a certain temperature for a certain temperature for a certain temperature for a certain temperature for a certain temperature for a certain temperature for a certain temperature. The apparatus of the present invention can be applied to the brown coal improvement process (such as the Shenhua Coalref process, the five-ring LCC process) provides thermal medium for drying the reaction furnace or the pyrolysis reaction, and can also be used for the dried coal gasification process grinding unit, which is a coal mill. Dry wet coal provides an inert circulating heat carrier. Background technique [0002] The hot air furnace is one of the key devices of the coal chemical device, mainly for pulverized drying, pyrolysis, etc., providing heat and inert drying carrier. Conventional hot air furnace systems generally use diesel or natural gas to dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24H3/02F24H9/18F23D14/02F23D14/60F23D14/64F23D14/70
CPCF23D14/02F23D14/60F23D14/64F23D14/70F24H3/025F24H9/1881
Inventor 徐浩鹏时明伟王伟彬辛妍邵松林王亚飞索颖袁莉刘悦
Owner BEIJING HANGHUA ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD
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