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Horizontal boiler with SNCR and OFA arranged in staggered manner

A horizontal boiler, staggered arrangement technology, applied in the direction of combustion using lump fuel and liquid fuel, combustion using lump fuel and gaseous fuel, combustion using lump fuel and powder fuel, etc., can solve the NOx emission High, poor adaptability to load changes, poor pulverized coal burnout, etc., to achieve the effect of reducing NOx content, reducing NOx content, and prolonging the duration of the process

Active Publication Date: 2018-01-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high denitrification cost of horizontal industrial pulverized coal boilers in the prior art, resulting in high NOx emissions in industrial pulverized coal boilers, poor pulverized coal burnout, poor adaptability to load changes, and low thermal efficiency, the present invention further Provide a horizontal boiler with staggered arrangement of SNCR and OFA, SNCR (selective non-catalytic reduction, selective non-catalytic reduction) OFA (over-fire air, horizontal boiler with staggered arrangement of exhaust air)

Method used

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  • Horizontal boiler with SNCR and OFA arranged in staggered manner
  • Horizontal boiler with SNCR and OFA arranged in staggered manner
  • Horizontal boiler with SNCR and OFA arranged in staggered manner

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specific Embodiment approach 1

[0021] Specific implementation mode one: combine Figure 1-Figure 3 Describe this embodiment, a horizontal boiler with SNCR and OFA interlaced arrangement described in this embodiment, it includes a burner 1, a furnace 2, an upward flue 8, a set of primary amino reducing agent nozzles 4, a set of primary The overburning air nozzle 5, a group of secondary overburning air nozzles 6, a group of secondary amino reducing agent nozzles 7 and two sets of temperature sensors 3; the burner 1 is installed at the front end of the furnace 2, and the upper flue 8 is connected to the furnace 2 The top of the rear end is connected, and the side wall from the front end to the rear end of the furnace 2 is fixedly installed with a group of primary amino reducing agent nozzles 4 and a group of primary overburning air nozzles 5, and the two sides of a group of primary amino reducing agent nozzles 4 are respectively A group of temperature sensors 3 is installed, and a group of secondary burn-off a...

specific Embodiment approach 2

[0022] Specific implementation mode two: combination Figure 1-Figure 2 Describe this embodiment, a horizontal boiler in which SNCR and OFA are arranged alternately in this embodiment, a group of primary amino reducing agent nozzles 4 are uniformly distributed along the longitudinal section of the furnace 2, and a group of primary overburning air nozzles 5 are evenly distributed along the circumferential direction of the longitudinal section of the furnace 2, a group of secondary overburning air nozzles 6 are uniformly distributed along the outer circumference of the furnace 2 in the vertical direction, and a group of secondary amino reducing agent nozzles 7 are arranged along the outer side of the upward flue 8 The walls are evenly distributed along the outer wall of the ascending flue 8, and the others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Specific implementation mode three: combination Figure 1-Figure 2 Describe this embodiment, a horizontal boiler with SNCR and OFA interlaced arrangement described in this embodiment, the number of a group of primary amino reducing agent nozzles 4 is four to sixteen, and a group of primary burn-off air nozzles The number of 5 is four to sixteen, the number of one group of secondary overburning air nozzles 6 is four to eight, and the number of one group of secondary amino reducing agent nozzles 7 is four to sixteen , the number of two groups of temperature sensors 3 is eight to thirty-two. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a horizontal boiler with SNCR and OFA arranged in a staggered manner and relates to an industrial boiler. The horizontal boiler with the SNCR and the OFA arranged in the staggered manner aims at solving the problems that a horizontal industrial coal powder boiler in the prior art is high in denitration cost, consequently, the NOx emission amount of an industrial coal powderboiler is high, the coal powder over-fire effect is poor, the adaptive capacity on load changes is poor, and the heat efficiency is low. The horizontal boiler with the SNCR and the OFA arranged in thestaggered manner comprises a combustor, a hearth, an upstream flue, a set of primary amino reducing agent spraying ports, a set of primary over-fire air spraying ports, a set of secondary over-fire air spraying ports, a set of secondary amino reducing agent spraying ports and two sets of temperature sensors; the combustor is installed at the front end of the hearth; the upstream flue is communicated with the top of the rear end of the hearth; the primary amino reducing agent spraying port and the primary over-fire air spraying port are fixedly installed on the side wall, from the front end tothe back end, of the hearth; and the secondary over-fire air spraying port and the secondary amino reducing agent spraying port are sequentially installed on the side wall of the upstream flue from bottom to top. The invention is used in the industrial boiler coal powder combustion field.

Description

technical field [0001] The present invention relates to an industrial boiler pulverized coal combustion boiler, in particular to a horizontal boiler in which SNCR and OFA are arranged alternately. Background technique [0002] In my country, coal-fired industrial boilers are the main coal-consuming equipment except power plant boilers, with a total of nearly 600,000 units and an annual coal consumption of nearly 640 million tons. Among them, small and medium-sized pulverized coal boilers account for a high proportion of my country's industrial boilers, with a large number and wide distribution, and there are also common problems such as low boiler thermal efficiency and large pollutant emissions. They have become one of the most important sources of NOx pollutant emissions in my country. , and with the improvement of the economic level, people's requirements for the quality of the living environment are getting higher and higher. The Chinese government's requirements for the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C5/08F23C7/02F23J7/00
Inventor 陈智超刘涛王炳楠严蓉曾令艳李争起
Owner HARBIN INST OF TECH
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