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Nitrogen oxide ultralow emission system, emission energy saving device and flue gas waste heat recoverer

A technology of flue gas waste heat and energy-saving device, which is applied to water heaters, preheating, greenhouse gas reduction, etc. , The effect of short construction period and convenient operation

Pending Publication Date: 2018-11-06
陕西大秦环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only wasting a lot of energy, but also causing serious environmental thermal pollution
[0006] (2) High emissions of nitrogen oxides
The emission standards for newly built gas-fired boilers require that the NOx emission concentration is less than or equal to 200mg / m 3 , it can be seen that the NOx emission concentration of gas-fired boilers in my country is relatively high, and the NOx emission control transformation of existing gas-fired boilers needs to be further tightened
[0008] (3) waste heat waste
[0010] (4) Smoke pollutes the environment

Method used

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  • Nitrogen oxide ultralow emission system, emission energy saving device and flue gas waste heat recoverer
  • Nitrogen oxide ultralow emission system, emission energy saving device and flue gas waste heat recoverer
  • Nitrogen oxide ultralow emission system, emission energy saving device and flue gas waste heat recoverer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as Figure 2-5 The shown flue gas waste heat recovery device includes a total water inlet pipe 1, a branch water inlet pipe 2, a total water outlet pipe 3, a discharging water pipe 4, a connecting flange 5, an adapter pipe 7 and a waste heat recovery unit. The waste heat recovery unit includes a base frame 8, a base tube 9 and a fin 10; the base frame 8 is a set of frame structures with opposite sides open, and the relatively open sides of the base frame 8 are connected to flanges 5 and The adapter tube 7 is connected, and the fin 10 is fixedly wound on the outer side wall of the base tube 9. The base tube 9 is arranged in the base frame 8; the upper and lower bottom surfaces of the base frame 8 are respectively provided with through holes, and the base tube 9 The upper end of the base pipe passes through the opening on the bottom surface of the base frame 8 and is connected to one end of the branch water inlet pipe 2. The other end of the branch water pipe 2 is conn...

Embodiment 2

[0044] Such as Figure 1-Figure 5 An energy-saving emission device is shown, which includes at least a flue gas waste heat recovery device 12, and also includes an economizer 15, a low-nitrogen burner 13, a mixing box 28 and a flue gas external circulation pipe 14, wherein the economizer 15 has an inlet Water outlet and water outlet, the water outlet of the economizer 15 is connected to the main water inlet pipe 1 of the flue gas waste heat recovery device 12; the economizer 15 also has a flue gas inlet and a flue gas outlet, and the flue gas outlet of the economizer 15 is connected with The flue gas waste heat recovery device 12 has a flue gas inlet connected, and the flue gas waste heat recovery device 12 exhausts flue gas. The low-nitrogen burner 13 has a flue gas inlet and a flue gas outlet, and the low-nitrogen burner 13 has a flue gas inlet. The mixing box 28 is connected to one end of the flue gas external circulation pipe 14.

[0045] Preferably, it further includes a wat...

Embodiment 3

[0048] Such as figure 1 The shown energy-saving emission device differs from Embodiment 2 in that it also includes a control unit, which consists of a thermal resistor 16, a pressure transmitter 23, a water outlet valve 17, a water inlet valve 18, a flow meter 21, and a flow rate. The regulating valve 22, the feed water pump 19 and the DCS control system are composed. The DCS control system is connected with a thermal resistance 16 wire connected between the economizer 15 and the flue gas waste heat recovery device 12; the pressure transmitter 23 is set in the flue gas waste heat recovery The pressure transmitter 23 is also connected to the DCS control system line on the exhaust port of the device 12; the water inlet of the water outlet valve 17 is connected with the water outlet of the economizer 15, and the water outlet of the water outlet valve 17 is connected to the exhaust heat recovery device 12 of the flue gas. The main water outlet pipe 1 is connected; the water inlet va...

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Abstract

The invention relates to the field of energy protection, in particular to a nitrogen oxide ultralow emission system. an emission energy saving device and a flue gas waste heat recoverer. According tothe system, the device and the recoverer, the flue gas is treated by combining the flue gas waste heat recoverer and a low-nitrogen combustor, so that the mode is a reasonable and effective mode, thesmoke is promoted to be discharged cleanly, moreover, most of waste heat is recycled, and the energy-saving effect is achieved while the environment is protected. Besides, an automatic control systemis equipped, so that the monitoring can be realized at any time, the parameters which can be flexibly adjusted is facilitated, and the efficiency can be improved.

Description

Technical field [0001] The invention relates to the field of energy and environmental protection, in particular to a nitrogen oxide ultra-low emission system, an emission energy saving device and a flue gas waste heat recovery device. Background technique [0002] The utilization of boiler waste heat resources is an important measure to save energy. The boiler exhaust waste heat accounts for a large proportion of the boiler heat, so it has a great recycling value. Comprehensive utilization of boiler flue gas to achieve energy saving is to use the waste flue gas discharged from traditional boilers for circulating return water and domestic hot water directly supplied by the heating boiler. The waste flue gas discharged from the boiler and the combustion-supporting air of the heating boiler can also be used to improve the air supply. Temperature to achieve energy saving has great theoretical and practical significance. [0003] Existing gas-fired boilers in my country have the follow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J15/06F22D1/12
CPCF22D1/12F23J15/06Y02E20/30
Inventor 李媛杜媛李军民郭小虎张小龙
Owner 陕西大秦环境科技有限公司
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