Venturi type powered coal cooling method with inert gas circulation
A technology of inert gas and cooling method, which is applied in the direction of drying solid materials, lighting and heating equipment, drying, etc., can solve the problems of smoke, dust, poor working environment and other problems, achieve enhanced mass transfer and heat transfer, and improve Economic and social benefits, the effect of reducing energy consumption
Active Publication Date: 2015-12-23
TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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Problems solved by technology
[0005] ①Dust is a serious problem in the open conveying process, the working environment on site is poor, and the natural cooling effect is limited
[0006] ② Artificial spraying of water in the storage yard can only solve the problem of dust on the surface. Although the pulverized coal on the surface will cool down, the dried pulverized coal will become wet coal again, and the pulverized coal accumulated in the lower layer is still accumulating heat continuously, reaching Smoke and spontaneous combustion will still occur after the critical point, which cannot fundamentally eliminate potential safety hazards
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[0024] Such as figure 1 Shown, a Venturi type pulverized coal cooling method of inert gas circulation, comprises the following steps:
[0025] (1) After drying, the pulverized coal at 70~85°C is conveyed into the Venturi conveyor 1, and is in contact with the circulating nitrogen gas at 35~45°C that is simultaneously conveyed into the Venturi conveyor 1, and is induced by the negative pressure generated by the Venturi. Injection, circulating nitrogen and pulverized coal are violently collided and mixed, and the heat is fully exchanged to obtain materials at 50~60°C and nitrogen at 50~55°C respectively.
[0026] (2) The material at 50~60℃ is brought into the bag filter 2 along with the nitrogen at 50~55℃ for separation, and the separated pulverized coal and the nitrogen after dust removal are obtained respectively; the separated pulverized coal is transported through the rotary unloader 3 out of the system and enter the next process.
[0027] Among them: the bag filter 2 is e...
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The invention relates to a Venturi type powered coal cooling method with inert gas circulation. The method comprises the following steps that firstly, dried powdered coal is conveyed into a Venturi conveyor and makes contact with circulation nitrogen synchronously conveyed into the Venturi conveyor, sufficient heat exchanging is achieved, and materials with the temperature of 50-60 DEG C and nitrogen with the temperature of 50-55 DEG C are obtained; secondly, the materials with the temperature of 50-60 DEG C is brought into a bag-type dust collector to be separated along with the nitrogen with the temperature of 50-55 DEG C, the separated powdered coal and the nitrogen with the dust removed are obtained independently, and the separated powered coal enters a next procedure through a rotation unloader delivering-out system; thirdly, the nitrogen with the dust removed sequentially passes a gas circulation pipeline and a nitrogen supplementing pipeline and then enters a cooling demister, meanwhile, fed cooling water is conveyed into the cooling demister for cooling and demisting, and nitrogen with the temperature of 35-45 DEG C, condensate and cooling return water are obtained independently; and fourthly, the nitrogen with the temperature of 35-45 DEG C is pressurized through a circulation draught fan and enters the Venturi conveyor, and a nitrogen closed-loop circulation cooling and conveying system is formed. The Venturi type powered coal cooling method is safe and low in energy consumption.
Description
technical field [0001] The invention relates to the technical field of pulverized coal cooling transportation and safe storage, in particular to a Venturi type pulverized coal cooling method with inert gas circulation. Background technique [0002] A certain amount of pulverized coal will be produced during the coal drying process. These pulverized coals are small in particle size (<100μm), low in moisture content (<10%), and high in temperature (70~80°C). They are extremely prone to spontaneous combustion during transportation and storage. , which poses a great security risk. [0003] The traditional treatment method is to use an open belt conveyor to cool down naturally during the transportation process, and to carry out artificial water spraying and dust suppression and cooling operations in the pulverized coal storage yard. [0004] The problems with the above approach are: [0005] ①Dust is a serious problem in the open conveying process, the working environment...
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Inventor 赵旭令永功骆浩
Owner TIANHUA INST OF CHEM MACHINERY & AUTOMATION