Corner tube boiler capable of being used for SCR denitration

An angle-tube boiler and denitration technology, which is applied in the field of boilers, can solve the problems of affecting the emission index of the boiler, low load, and the flue temperature of the denitration window cannot meet the minimum requirements of the denitration temperature, etc., and achieves the effect of meeting the environmental protection emission requirements.

Pending Publication Date: 2019-02-15
哈尔滨红光锅炉总厂有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the actual load of the existing angle tube boiler is low, the smoke temperature of the denitrification window does not meet the minimum requirement of the denitrification temperature, and affects the final emission index of the boiler, a corner tube boiler that can be used for SCR denitrification is proposed

Method used

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  • Corner tube boiler capable of being used for SCR denitration

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specific Embodiment approach 1

[0011] Specific implementation mode one: combine figure 1 Describe this embodiment. A corner tube boiler that can be used for SCR denitrification described in this embodiment includes a boiler body and a smoke exhaust mechanism. The smoke exhaust mechanism includes a connecting flue 1, a high-temperature bypass flue 2, an SCR denitrification reactor 3, The economizer 4 and the air preheater 5 are connected to the inlet end of the flue 1 and the low-temperature flue gas exhaust port 6 of the boiler body, and the low-temperature flue gas exhaust port 6 is arranged behind the flag-type convection screen 8 in the boiler body The other end connected to flue 1 is provided with SCR denitrification reactor 3, economizer 4 and air preheater 5 sequentially from inside to outside. The smoke port 7 is connected, the high temperature flue gas exhaust port 7 is set at the front end of the flag type convection screen 8 in the boiler body, the outlet end of the high temperature bypass flue 2 ...

specific Embodiment approach 2

[0013] Specific implementation mode two: combination figure 1 To describe this embodiment, the high-temperature bypass flue 2 in this embodiment is provided with a flue gas regulating valve 2-1. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0014] Such a design can adjust the flow rate of the high-temperature flue gas in the high-temperature bypass flue 2 according to the actual temperature of the flue gas entering the connecting flue 1, so that the mixed flue gas meets the denitrification reaction temperature.

specific Embodiment approach 3

[0015] Specific implementation mode three: combination figure 1 To describe this embodiment, a temperature sensor is provided at the upper end of the SCR denitration reactor 3 described in this embodiment. The undisclosed technical features in this embodiment are the same as those in the second embodiment.

[0016] In this design, the temperature sensor is used to monitor the flue gas temperature at the upper end of the SCR denitrification reactor 3. When the temperature is lower than 320°C, a signal is sent to the controller, and the operator opens the flue gas regulating valve 2-1 through the controller to introduce high-temperature flue gas; When the flue gas temperature meets the denitrification temperature, the temperature sensor sends a signal to the controller, and the operator closes the flue gas regulating valve 2-1 through the controller.

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Abstract

The invention discloses a corner tube boiler capable of being used for SCR denitration, and relates to the technical field of boilers. The corner tube boiler capable of being used for the SCR denitration aims to solve the problems that the actual load of an existing corner tube boiler is low, the smoke temperature of a denitration window cannot meet the minimum requirement of a denitration temperature, and a final emission index of the boiler is affected. The corner tube boiler capable of being used for the SCR denitration comprises a boiler proper and a smoke exhaust mechanism. The smoke exhaust mechanism comprises a connecting flue, a high-temperature bypass flue, an SCR denitration reactor, a coal economizer and an air preheater; the inlet end of the connecting flue is connected with alow-temperature flue gas exhaust outlet of the boiler proper, and the low-temperature flue gas exhaust outlet is formed in the rear end of a flag type convection screen in the boiler proper; the SCR denitration reactor, the coal economizer and the air preheater are sequentially arranged at the other end of the connecting flue from inside to outside; and the inlet end of the high-temperature bypassflue is connected with a high-temperature flue gas exhaust outlet of the boiler proper, the high-temperature flue gas exhaust outlet is formed in the front end of the flag type convection screen in the boiler proper, and the outlet end of the high-temperature bypass flue is connected with the connecting flue. The corner tube boiler capable of being used for the SCR denitration is used for environment-friendly boilers.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a corner tube boiler which can be used for SCR denitrification. Background technique [0002] Corner tube boilers are widely used in production fields and heating in various industries, and have the advantages of high efficiency and energy saving. However, with the improvement of national environmental protection emission requirements, more stringent requirements have been put forward for boiler emissions. [0003] Among them, the restrictions on the emission of nitrogen oxides from boilers are more stringent. Corner tube boilers are a kind of layer-fired boilers. Due to the combustion mechanism, the furnace needs to have a higher combustion temperature, and the amount of nitrogen oxides generated is higher. Discharge after denitrification. SCR denitrification is currently a commonly used high-efficiency denitrification technology, but the temperature of the flue gas entering t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23B80/00F23J15/08F23J15/02
CPCF23B80/00F23J15/02F23J15/08F23J2215/10
Inventor 李鑫喻鹏姜英波张华斌吕雪艳
Owner 哈尔滨红光锅炉总厂有限责任公司
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