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A low-temperature air exhaust gas heating device and process

A low-temperature air and heating device technology, which is applied in the field of low-temperature air heating and low-temperature air exhaust gas heating devices, can solve the problems of increasing the cost of low-temperature air heating and discharging, large investment in boiler equipment, and large floor area, and achieves obvious water saving and energy saving. , Simple structure, less investment in equipment

Active Publication Date: 2018-07-27
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of low-temperature air, the amount of steam required is also large, which increases the cost of heating and discharging low-temperature air; at the same time, the discharge of low-temperature air is intermittent, and during the discharge period, in order to ensure that all low-temperature air is heated, regardless of the low temperature Whether the air enters the vent tower, the steam needs to be in a hot standby state, so as to heat the incoming low-temperature air at any time, resulting in waste of steam; at the same time, high-temperature steam is generated by the heat provided by the combustion of fuel in the boiler, and the boiler equipment investment Large, occupying a large area, not suitable for the needs of small and medium-sized enterprises to reduce production costs

Method used

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  • A low-temperature air exhaust gas heating device and process
  • A low-temperature air exhaust gas heating device and process
  • A low-temperature air exhaust gas heating device and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, the low-temperature air discharge gas heating device and flow process are as follows: figure 2 Shown:

[0033] like figure 2 As shown, the low-temperature air (-70°C, flow rate 300kg / s) is divided into two parts from the low-temperature air inlet 5, and part of the low-temperature air (30kg / s) is controlled by the flow regulating valve 7 and flows through the jacketed pipe 2 to the device. One end of the burner 3 enters the inner pipe through the jacket pipe 2 near the burner; another part of low-temperature air (270kg / s) flows through the jacket pipe 2 to the direction of the discharge tower 4, and passes through the tail end of the fuel combustion area of ​​the inner pipe 1 The opening 6 enters the inner pipe from the jacket pipe 2 and mixes with the flue gas. The flue gas generated by combustion is used to heat the low-temperature air to increase the temperature of the low-temperature air, and finally enters the discharge tower for discharge. ...

Embodiment 2

[0037] In this embodiment, the low-temperature air discharge gas heating device and flow process are as follows: image 3 Shown:

[0038] like image 3 As shown, the low-temperature air (-70°C, flow rate 70kg / s) is divided into two parts at the connection between the low-temperature air inlet 5 and the jacket pipe 2, and a part of the low-temperature air (5kg / s) passes through the ring intermittent 9 to control the flow rate through the clamp. The sleeve pipe 2 flows to the end where the burner 3 is installed, and enters the inner pipe from the jacket pipe 2 near the burner; another part of low-temperature air (65kg / s) flows through the jacket pipe 2 to the direction of the discharge tower 4, and in the pipe 1 The tail end of the tube fuel combustion area enters the inner pipe from the jacket tube 2 through the opening 6 and mixes with the flue gas. The flue gas generated by combustion is used to heat the low-temperature air to increase the temperature of the low-temperature ...

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Abstract

The invention provides a low-temperature air discharge gas heating device, and belongs to the technical field of large air treatment. The heating device comprises a pipe, a jacket pipe wrapped at the external of the pipe, and a burner; the burner is positioned at one end of the pipe; the other end of the pipe is connected with a discharge tower; the jacket pipe is provided with a low-temperature air inlet; and the pipe is provided with a hole near the direction of the discharge tower. The invention further relates to a process for low-temperature air heating by the heating device. Low-temperature air is divided into two parts; one part serves as air needed by fuel combustion, so that the external supply air quantity for fuel combustion is reduced, and the fuel use level is saved; and smoke generated by fuel combustion is adopted to directly heat the low-temperature air, so that the investments of steam generation and water treatment facilities are saved, the water consumption is reduced, the fuel combustion efficiency is high, and the water and energy saving effect is good. The low-temperature air discharge gas heating device and process is simple in structure, water-saved, energy-saved, low in equipment investment and high in fuel efficiency.

Description

technical field [0001] The invention belongs to the technical field of large-scale air treatment, and in particular relates to a low-temperature air heating device, in particular to a low-temperature air exhaust gas heating device and process. Background technique [0002] When large-scale air is processed, the large flow of low-temperature air needs to be vented through the anechoic air defense tower, and the low temperature air needs to be heated to normal temperature before entering the anechoic air defense tower, and then discharged through the anechoic air defense tower. At present, the commonly used method of heating low-temperature air is to mix steam with low-temperature air, transfer the heat of high-temperature steam to low-temperature air, and achieve the purpose of heating low-temperature air. Due to the large amount of low-temperature air, the amount of steam required is also large, which increases the cost of heating and discharging low-temperature air; at the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28C3/02F24H3/02
CPCF24H3/025F28C3/02
Inventor 蹇守华黄维柱
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND