CN204165038U - A kind of U-shaped flame pulverized coal firing boiler - Google Patents

A kind of U-shaped flame pulverized coal firing boiler Download PDF

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Publication number
CN204165038U
CN204165038U CN201420505057.2U CN201420505057U CN204165038U CN 204165038 U CN204165038 U CN 204165038U CN 201420505057 U CN201420505057 U CN 201420505057U CN 204165038 U CN204165038 U CN 204165038U
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coal
boiler
combustion
cooling
water
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CN201420505057.2U
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王欢
王民发
郎凤娥
郎鹏德
王秀
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SHANXI LANTIAN ENVIRONMANTAL ENGINEERING Co Ltd
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SHANXI LANTIAN ENVIRONMANTAL ENGINEERING Co Ltd
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Abstract

The utility model discloses a kind of U-shaped flame pulverized coal firing boiler, relate to boiler, the thermal efficiency that resolve Link bar oven exists is low, and residual ash is high, the shortcoming of smoke pollution object height.A kind of U-shaped flame pulverized coal firing boiler, comprises combustion system, water-cooling system, air preheater, ash silo system; Wherein said combustion system comprises the vertical pre-combustion hearth being arranged on boiler front end and the coal burner be fixed on furnace roof, and described coal burner inwardly rotates; Described water-cooling system comprises furnace roof water-cooling wall, furnace wall cooling, convection bank; Described air preheater is fixed on the top of coal-fired induction system; Described ash-slag disposal system is hydraulic slag removal system, is arranged on burner hearth bottom.The utility model greatly reduces Fuel Consumption, improves the boiler operatiopn thermal efficiency, and its Pollutant emission concentration reaches discharging standards simultaneously.

Description

A kind of U-shaped flame pulverized coal firing boiler
Technical field
The utility model relates to boiler, is specifically related to a kind of U-shaped flame pulverized coal firing boiler.
Background technology
Coal-burned industrial boiler is the main heat energy equipment of China, and according to statistics, end 2010, sum reaches 60.12 ten thousand, and total capacity reaches 3,480,000 and steams ton, and year consumes 700,000,000 tons, coal nearly.At present coal-burned industrial boiler mainly chain furnace, account for more than 85%.
The structure of existing chain furnace as shown in Figure 1, comprises coal-fired induction system, combustion system, water-cooling system, ash-slag disposal system; Wherein coal-fired induction system comprises feeding device, the defeated device for coal of chain type and air-supply arrangement; Combustion system is provided with chimney arch and fire grate front wall, and the Area comparison of burner hearth is little; Water-cooling system comprises water-cooling wall, boiler header and drum.This chain furnace, adopt broken coal burning, granularity is uneven, there is following shortcoming: coefficient of excess air is high, and bulky grain burning is not thorough, and residual ash is high, and boiler hot effect is lower, and flue gas pollutant is difficult to up to standard.
In recent years, country is while rapid economic development, the concern of energy-conserving and environment-protective is progressively strengthened, coal-burned industrial boiler pays close attention to one of object, " State Council is about the suggestion accelerating development energy-conserving and environment-protective industry " of up-to-date appearance, " prevention and control of air pollution action plan ", " emission standard of air pollutants for boilers " etc. have all carried out clearly indicating to the developing direction of coal-burned industrial boiler and emission control standard, accelerate the upgrading of power-saving technology equipment, realize the emphasis that energy efficiency is development, chain furnace is as accounting for the maximum type of furnace of existing coal-burned industrial boiler total amount, it is transformed and updates extremely urgent.
In order to the above-mentioned defect that resolve Link bar oven exists, meet the demand of energy-conserving and environment-protective, the utility model have developed a kind of boiler of new structure.
Summary of the invention
The utility model is that residual ash is high, the shortcoming of smoke pollution object height, and provides a kind of U-shaped flame pulverized coal firing boiler in order to the thermal efficiency of resolve Link bar oven existence is low.
The utility model is achieved through the following technical solutions:
A kind of U-shaped flame pulverized coal firing boiler, comprises combustion system, water-cooling system, air preheater, ash silo system; Wherein said combustion system comprises the vertical pre-combustion hearth being arranged on boiler front end and the coal burner be fixed on furnace roof, and described coal burner inwardly rotates; Described water-cooling system comprises furnace roof water-cooling wall, furnace wall cooling, convection bank; Described air preheater is fixed on the top of coal-fired induction system; Described ash-slag disposal system is hydraulic slag removal system, is arranged on burner hearth bottom.
Further, described coal burner comprises 3-5, can be different according to combustion space, arranges the coal burner of suitable quantity.
The utility model boiler combustion mode is burnt from grate firing and becomes the steam generator system of coal dust firing, have efficient energy-saving, environment-protecting clean, simple to operate, take up an area advantages such as saving, safe and reliable, specifically, comprise following some:
(1) combustion system: cancel former fire grate front wall and chimney arch, expand existing burner hearth, form vertical pre-combustion hearth, increase furnace heating surface to amass, at boiler front wall collocation coal burner, different according to combustion space, arrange the number of burner, and burner is inwardly rotated, realize in burner hearth, realizing U-shaped flame combustion, while efficient burning, have the effect of low nitrogen burning concurrently;
(2) water-cooling system: newly-increased pre-combustion hearth water-cooling wall and convection bank, increase radiation and be heated and heat convection, improve boiler heat exchange efficiency, boiler header and drum position remain unchanged, and tube connector carries out local directed complete set respectively according to water-cooling system;
(3) air preheater: increase air preheater, improves air themperature, can overheavy firing, flameholding is made to reduce incomplete combustion loss and the imperfect combustion loss of chemistry, make coal combustion complete simultaneously, can excess air be reduced, thus reduce flue gas loss and blower fan power consumption; Improve air themperature, chamber temperature can be made to raise, strengthening radiant heat transfer;
(4) ash-slag disposal system: by improving combustion system, the grey quantity of slag produced reduces greatly, for reliability and the economy of the using function and system cloud gray model that take into full account place, burner hearth bottom slag-tapping system changes water sluice into, this system architecture is simple, and good airproof performance, takes up an area little, simultaneously for the feature that the grey quantity of slag adopting coal dust firing mode to produce is few, be convenient to carry out subsequent treatment.
Compared with prior art, the utility model has the following advantages:
By the improvement of above system, achieve under the condition of limited space, traveling-grate stoker is changed into the coal-burned industrial boiler of coal dust firing form, greatly reduce Fuel Consumption, improve the boiler operatiopn thermal efficiency, its Pollutant emission concentration reaches discharging standards simultaneously
The utility model develops a kind of U-shaped flame coal dust combustion system and substitutes chain fire-gate technology, in Retrofit of Combustion System, by the space displacement to water system, realize the function of newly-increased pre-combustion hearth, furnace roof arranges burner, achieves U-shaped flame combustion in burner hearth.
Compared with prior art, the utility model has the following advantages:
(1) this boiler entirety can reach efficient and low pollution emission: time coal-fired, boiler thermal output reaches 90%, and Pollutant emission concentration dust is not more than 30mg/m 3, SO 2be not more than 100mg/m 3, NOx is not more than 250mg/m 3;
(2) saving coals from boiler rate can reach more than 30%;
The utility model greatly reduces Fuel Consumption, improves the boiler operatiopn thermal efficiency, and its Pollutant emission concentration reaches discharging standards simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing chain furnace;
Fig. 2 is structural representation of the present utility model;
In figure: the vertical pre-combustion hearth of 1-, 2-coal burner, 3-furnace roof water-cooling wall, 4-furnace wall cooling, 5-convection bank, 6-air preheater, 7-hydraulic slag removal system.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
The U-shaped flame pulverized coal firing boiler of one as shown in Figure 2, comprises combustion system, water-cooling system, air preheater, ash-slag disposal system; Wherein said combustion system comprises the vertical pre-combustion hearth 1 being arranged on front end and the coal burner 2 be fixed on furnace roof, and described coal burner inwardly rotates; Described water-cooling system comprises furnace roof water-cooling wall 3, furnace wall cooling 4, convection bank 5; Described air preheater 6 is fixed on the top of coal-fired induction system; Described ash-slag disposal system is hydraulic slag removal system 7, is arranged on burner hearth bottom.
Wherein coal burner 4 comprises 3-5, can be different according to combustion space, arranges the coal burner of suitable quantity.

Claims (2)

1. a U-shaped flame pulverized coal firing boiler, is characterized in that, comprises combustion system, water-cooling system, air preheater, ash-slag disposal system; Wherein said combustion system comprises the vertical pre-combustion hearth (1) being arranged on front end and the coal burner (2) be fixed on furnace roof, and described coal burner inwardly rotates; Described water-cooling system comprises furnace roof water-cooling wall (3), furnace wall cooling (4), convection bank (5); Described air preheater (6) is fixed on the top of coal-fired induction system; Described ash-slag disposal system is hydraulic slag removal system (7), is arranged on burner hearth bottom.
2. U-shaped flame pulverized coal firing boiler according to claim 1, is characterized in that, described coal burner (4) comprises 3-5.
CN201420505057.2U 2014-09-03 2014-09-03 A kind of U-shaped flame pulverized coal firing boiler Active CN204165038U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420505057.2U CN204165038U (en) 2014-09-03 2014-09-03 A kind of U-shaped flame pulverized coal firing boiler

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Application Number Priority Date Filing Date Title
CN201420505057.2U CN204165038U (en) 2014-09-03 2014-09-03 A kind of U-shaped flame pulverized coal firing boiler

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104764852A (en) * 2015-03-27 2015-07-08 辽宁科技大学 Visual detection method of pulverized coal combustion ratio
CN109631014A (en) * 2019-02-22 2019-04-16 北控清洁热力有限公司 A kind of pulverized-coal fired boiler and its remodeling method of chain-grate boiler transformation
CN109654476A (en) * 2019-02-28 2019-04-19 北控清洁热力有限公司 A kind of reciprocating-grate boiler is changed to the method and pulverized-coal fired boiler of pulverized-coal fired boiler

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104764852A (en) * 2015-03-27 2015-07-08 辽宁科技大学 Visual detection method of pulverized coal combustion ratio
CN109631014A (en) * 2019-02-22 2019-04-16 北控清洁热力有限公司 A kind of pulverized-coal fired boiler and its remodeling method of chain-grate boiler transformation
CN109631014B (en) * 2019-02-22 2024-02-20 北控清洁热力有限公司 Pulverized coal boiler transformed by chain boiler and transformation method thereof
CN109654476A (en) * 2019-02-28 2019-04-19 北控清洁热力有限公司 A kind of reciprocating-grate boiler is changed to the method and pulverized-coal fired boiler of pulverized-coal fired boiler

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