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Industrial production smoke cooling, dust reducing and waste heat recycling device and method

A technology of waste heat recovery device and heat exchange device, which is applied in separation methods, chemical instruments and methods, waste heat treatment, etc., can solve the problems of fluctuation of production process, low dust removal efficiency, and insignificant cooling effect, so as to achieve stable product quality and improve product quality. The effect of stable product quality and easy centralized collection

Pending Publication Date: 2017-10-20
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of low dust removal efficiency, inconspicuous cooling effect and easy fluctuation of the entire production process due to the installation of the cooling air valve in the process of dusty flue gas treatment in the prior art, the present invention provides an industrial production flue gas cooling dust reduction waste heat Recovery device and recovery method

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  • Industrial production smoke cooling, dust reducing and waste heat recycling device and method
  • Industrial production smoke cooling, dust reducing and waste heat recycling device and method
  • Industrial production smoke cooling, dust reducing and waste heat recycling device and method

Examples

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Effect test

Embodiment 1

[0047] The waste heat recovery device for flue gas cooling and dust reduction in industrial production in this embodiment includes: an air guide mechanism 5, which can be a vertical or horizontal barrel-shaped structure. This embodiment adopts a vertical barrel-shaped structure with a diameter of 3400 mm and a height of It is 4600mm, which is used to cool down the whole device; inside the air guiding mechanism 5, and the flue gas cooling mechanism 3 with the air guiding mechanism 5 is a cavity ring structure, also in the shape of a vertical barrel, The diameter is 3000mm, and the height is 4000mm. Due to the temperature drop, the density of large particles of smoke and dust will increase, and they will fall on the bottom of the flue gas cooling mechanism 3 to achieve the effect of dust reduction in the first step; and be fixed on the top of the air guide mechanism 5 The heat exchange device 11 inside the air outlet pipe 1 can be a plate or tube heat exchanger, and the heat exch...

Embodiment 2

[0049] The industrial production flue gas temperature reduction and dust reduction waste heat recovery device of this embodiment has the same basic structure as that of Embodiment 1, the differences and improvements are as follows: figure 1 , 3 As shown, the flue gas cooling mechanism 3 is a closed barrel-shaped structure to avoid fluctuations in the flue gas caused by external airflow throughout the process. The dust-laden flue gas introduction pipe 2 penetrates from the top of the barrel-shaped structure and is inserted into the barrel The bottom of the barrel-shaped structure lengthens the flow distance of the flue gas in the entire flue gas cooling mechanism 3, allowing large particles of smoke to have enough time to cool down and fall; the dust-reducing flue gas outlet pipe 8 is fixed on the upper part of the barrel-shaped structure On the side, the dust-reduced flue gas is exported through the pipe; the bottom of the barrel-shaped structure is closed, and communicates wi...

Embodiment 3

[0051] The basic structure of the waste heat recovery device for industrial production flue gas cooling and dust reduction in this embodiment is the same as that of Embodiment 2, the difference and improvement is that the part of the dust-laden flue gas introduction pipe 2 inserted into the barrel-shaped structure is a trumpet-like shape that gradually opens downwards The opening 21 gradually reduces the airflow velocity of the flue gas, avoids excessive fluctuations in the process due to drastic reduction, and gradually slows down the flow velocity of the dusty flue gas, prolongs the flow time of the flue gas in the entire flue gas cooling mechanism 3, and further allows Large particles of soot have ample time to cool down and fall. The air guide mechanism 5 is in the form of a drum structure with the upper part gradually closed, which is convenient for the hot air after heat exchange to flow out concentratedly for secondary heat exchange and utilization; the diameter is large...

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Abstract

The invention discloses an industrial production smoke cooling, dust reducing and waste heat recycling device and method and belongs to the technical field of smoke treatment of various production systems before blast furnace ironmaking. The device comprises an air guide mechanism, a smoke cooling mechanism and a heat exchange device, wherein the air guide mechanism is used for cooling the whole device; the smoke cooling mechanism is located inside the air guide mechanism, and the smoke cooling mechanism and the air guide mechanism are of a cavity loop type structure, and large-particle smoke falls to the bottom of the smoke cooling mechanism due to the facts that the temperature is decreased and the density is increased; the heat exchange device is fixed in an air exhaust pipe at the top of the air guide mechanism, and the heat generated during heat exchange of the air guide mechanism is absorbed through the heat exchange device; and the smoke cooling mechanism is externally connected with a dust-containing smoke guide-in pipe and a dust-reducing smoke guide-out pipe which penetrate out of the air guide mechanism. According to the industrial production smoke cooling, dust reducing and waste heat recycling device and method, the purposes of cooling the dust-containing smoke, dropping and recycling dust-containing particles and recycling and utilizing heat can be achieved, in addition, a cooling air valve can be omitted without fluctuating the technique of the whole system, and the quality of produced products is stable.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment in various production systems before blast furnace ironmaking, and in particular to a waste heat recovery device and recovery method for flue gas cooling and dust reduction in large-scale industrial production. Background technique [0002] In modern industrial production, a large amount of flue gas will be produced. The maximum temperature of the flue gas generated in industrial production is 350°C to 500°C, and it also contains a large amount of dust and residual CO and SO 2 Harmful gases such as dust are usually discharged into the atmosphere after dust recovery. [0003] Due to the high temperature of the dust-laden flue gas, dust collection is usually carried out with an electric dust collector, and the effect is very unsatisfactory, and it is difficult to meet the national emission standard of 100mg / m 3 , usually at 80-200mg / m 3 , Bring greater wear and tear to the main fan equi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00B01D45/02
CPCB01D45/02F27D17/004
Inventor 廖海欧徐兆春江济
Owner MAANSHAN IRON & STEEL CO LTD
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