Large-capacity efficient ultra-supercritical tower-type baffle temperature-adjusting brown coal boiler matched with fan mill

An ultra-supercritical, large-capacity technology, applied in the field of boilers, can solve problems such as low efficiency, difficulty in reheating the design value, and inability to guarantee full-load denitrification, and achieve the effect of enriching adjustment means

Pending Publication Date: 2018-09-11
HARBIN BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tower boiler is more suitable for the arrangement of the fan mill, but the tower boiler at the present stage adopts the water spray temperature adjustment method, but it is difficult for the reheater to achieve the The design value; and the traditional economizer layout is only a first-level layout, which cannot guarantee full-load denitrification, and the efficiency is low

Method used

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  • Large-capacity efficient ultra-supercritical tower-type baffle temperature-adjusting brown coal boiler matched with fan mill

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Effect test

specific Embodiment approach 1

[0014] A large-capacity and high-efficiency ultra-supercritical tower-type temperature-regulated lignite boiler with a fan mill of the present invention includes a boiler body, and the furnace 1 of the boiler body is equipped with an economizer system, a superheater system and a reheater system. A partition wall 2 is provided above the furnace 1 to divide the flue gas into two paths; a flue gas regulating baffle 3 is provided above the partition wall 2 to adjust the ratio of flue gas on both sides of the partition wall 2;

[0015] The economizer system includes a furnace economizer 4 and a flue economizer 5, the furnace economizer 4 and the flue economizer 5 are connected through an economizer connecting pipe; Between the gas regulating baffles 3, the flue economizer 5 is installed in the outlet flue 6 of the denitrification SCR reactor; the heating surfaces in the furnace of the economizer system are arranged in series;

[0016] The superheater system includes a primary super...

specific Embodiment approach 2

[0023] The difference between the second embodiment and the first embodiment is that the inlet tube panel 10 of the primary superheater and the outlet tube panel 11 of the primary superheater are connected and fixed by hanging pipes.

specific Embodiment approach 3

[0024] The difference between the third embodiment and the first embodiment is that the furnace 1 includes a water cooling wall system, and the water cooling wall system includes a spiral coil water cooling wall 14 and a vertical tube coil water cooling wall 15, and the spiral tube coil water cooling wall 14 is used as the middle part of the furnace 1 and the lower part, the vertical tube coil water cooling wall 15 is used as the upper part of the furnace 1, and the spiral tube coil water cooling wall 14 and the vertical tube coil water cooling wall 15 are connected by a mixing header.

[0025] The furnace is surrounded by a water-cooled wall system, which includes two parts, namely, the vertical tube coil water-cooled wall 15 and the spiral tube coil water-cooled wall 14, which are bounded by a mixing header.

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Abstract

The invention discloses a large-capacity efficient ultra-supercritical tower-type baffle temperature-adjusting brown coal boiler matched with a fan mill and relates to a boiler, in particular to a tower-type boiler subjected to temperature adjusting through a baffle. The problem that a reheater cannot reach the design value through the steam temperature adjusting means of an original boiler is solved. The large-capacity efficient ultra-supercritical tower-type baffle temperature-adjusting brown coal boiler matched with the fan mill comprises a boiler body. A coal economizer system, a superheater system and a reheater system are arranged in a hearth of the boiler body. Arrangement of the coal economizer system is superior to that of a traditional primary coal economizer in the aspects thatfull-load denitration of the boiler can be ensured and the efficiency of a whole boiler unit is improved. A secondary superheater is arranged on the front face of a middle partition wall, the smoke proportion between the superheater and the reheater is adjusted through a smoke adjusting baffle to achieve the purpose of steam temperature adjusting finally, and it can be better ensured that the reheater reaches the design value.

Description

technical field [0001] The invention relates to a boiler, in particular to a tower-type boiler which utilizes baffles for temperature regulation. Background technique [0002] my country has abundant reserves of lignite resources, and the fan mill has good adaptability to high-moisture lignite. The tower boiler is more suitable for the arrangement of the fan mill, but the tower boiler at this stage adopts the water spray temperature adjustment method, but it is difficult for the reheater to achieve the The design value; and the traditional economizer layout is only a first-level layout, which cannot guarantee full-load denitrification and low efficiency. Contents of the invention [0003] The purpose of the present invention is to overcome the problem that it is difficult to make the reheater reach the design value by means of adjusting the steam temperature of the original boiler, and provide a large-capacity and high-efficiency ultra-supercritical tower-type baffle temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B1/22F22B31/08F22D1/02F22G1/02F23J15/06F23L15/04
CPCF22B1/22F22B31/08F22D1/02F22G1/02F23J15/06F23L15/04Y02E20/34
Inventor 龙志云商宇薇孙洪民王永杰黄必重胡双南司石默贾清泉高雷
Owner HARBIN BOILER
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