CN212961507U

CN212961507U - 150MW ultra-high pressure CFB boiler with poly-generation

Info

Publication number: CN212961507U
Application number: CN202021673935.3U
Authority: CN
Inventors: 高新宇; 姜雪; 庄建华; 胡雪
Original assignee: Harbin Boiler Co Ltd
Current assignee: Harbin Boiler Co Ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-04-13
Anticipated expiration: 2030-08-12

Abstract

150MW ultra-high pressure CFB boiler with poly-generation. At present, the 150MW ultrahigh pressure CFB boiler technology is mature, a large amount of coal pyrolysis combustion graded conversion technology is applied at home and abroad, but at present, the two technologies are respectively developed and applied. The utility model discloses a constitution includes: hearth (1), vapour cold separator (3), gasifier (19), the hearth with vapour cold separator between be connected with catch water (11), the hearth in the upper portion space have connected gradually II level superheater (7), high temperature reheater (6), water-cooling screen (5), all draw forth from the stokehold, the hearth below be connected with cold sediment ware (9) and bed under start-up combustor (10), cold sediment ware draw forth to the stokehold, the bed under start-up combustor draw forth to the stove back, arrange at separation feed back system with gasifier below. The utility model is used for take poly-generation's 150MW superhigh pressure CFB boiler.

Description

150MW ultra-high pressure CFB boiler with poly-generation

The technical field is as follows:

the utility model relates to a boiler technical field, concretely relates to take 150MW superhigh pressure CFB boiler of polygeneration.

Background art:

china is a country rich in coal, poor in oil and less in gas, namely a country taking coal as a main energy resource. Although the proportion of coal energy in China will gradually decrease in the next decades, the leading position of coal in the energy structure in China cannot be fundamentally changed, and China still is a country with coal as a main energy source. The priority theme of clean, efficient development and utilization and liquefaction of coal in the field of important energy sources in the compendium of national middle and long-term scientific and technical development planning (2006-2020); the relevant key research directions and technologies determined by 'twelve-five special projects for clean coal technology and technology development': coal quality improvement and comprehensive utilization, direct gasification of low-rank coal, and deep processing of coal pyrolysis tar; 5/2015, the national energy agency issues an action plan for clean and efficient utilization of coal (2015-2020), specifically requiring: the demonstration of coal quality improvement processing, grading and gradient utilization, coal mine waste resource utilization and the like is stably promoted, and a batch of coal clean and efficient utilization demonstration engineering projects are built. "2016 national energy agency" advanced technology and equipment recommendation catalog (first batch) for safe and green development and clean and efficient utilization of coal): low-temperature dry distillation and quality-based utilization, medium-low temperature coal tar hydrogenation and semi-coke powder forming technology. Title 63 major technical equipment popularization and application guide catalogue (second edition in 2015) of Ministry of industry and communications [ 2015 ] contains large-scale fine coal fluidized bed grading quality-divided pyrolysis furnace complete equipment. In 2016, the national improvement committee and the national energy agency jointly issue an action plan for innovation of energy technology revolution (2016-2030), which indicates that the innovation of the technology for enhancing graded and graded conversion of coal is focused on the technologies of advanced coal gasification, large-scale coal pyrolysis, utilization of tar and semicoke, integration of gasification and pyrolysis, integration of gasification and combustion and the like, and the demonstration projects of coal gasification, low-rank coal pyrolysis in million tons/year, combined oil and power generation and the like of 3000 tons/day and above are developed. At present, the 150MW ultrahigh pressure CFB boiler technology is mature and is widely applied at home and abroad, and meanwhile, the coal pyrolysis combustion graded conversion technology is mature and is successfully applied in some projects, but at present, the two technologies are respectively developed and applied.

The utility model has the following contents:

the utility model aims at providing a take 150MW superhigh pressure CFB boiler of polygeneration.

The above purpose is realized by the following technical scheme:

a150 MW ultra-high pressure CFB boiler with poly-generation comprises the following components: the gasification furnace comprises a hearth, a steam-cooled separator and a gasification furnace, wherein the steam-cooled separator is connected between the hearth and the steam-cooled separator, a II-level superheater, a high-temperature reheater and a water-cooled screen are sequentially connected in the upper space in the hearth and are all led out from the front of the furnace, a slag cooler and a below-bed starting burner are connected below the hearth, the slag cooler is led out towards the front of the furnace, the below-bed starting burner is led out towards the back of the furnace and is arranged below a separation feed back system and the gasification furnace, the steam-cooled separator is arranged between the hearth and a tail flue, the upper part of the steam-cooled separator is connected with the hearth through a separator inlet flue, the lower part of the steam-cooled separator is connected with the tail wall-wrapped superheater through a separator outlet flue;

the gasifier is arranged on the outer side of the steam-cooling separator and is sequentially connected with the first separator and the second separator through a gasifier outlet flue, the gasifier is connected with a return leg of a boiler separation return system and is connected with a boiler return valve inclined leg through a gasifier return valve, and the boiler return valve inclined leg is connected with the hearth.

Take 150MW superhigh pressure CFB boiler of polygeneration, the package wall superheater arrange at furnace dead astern, square package wall superheater central line also with boiler central line coincidence, the package wall superheater arrange for the single flue, from last to connecting gradually III level superheater, I level superheater down, the low temperature re-heater, package wall superheater below from the top down connect gradually economizer I, air heater pass through hot-blast main and furnace and connect, its exhanst gas outlet and air inlet connect the flue gas system respectively.

Has the advantages that:

1. the utility model discloses the superhigh pressure circulating fluidized bed who is by a main steam flow 440t/h fires burning furnace and 2 fluidized bed pyrolysis gasifier and forms, and single pyrolysis gasifier advances the coal volume and is 40t/h, closely combines 150MW superhigh pressure circulating fluidized bed boiler and pyrolysis gasifier, realizes the joint production of heat, electricity, tar, coal gas through simple and advanced technology in one set of system. The high-quality coal gas and tar are produced while generating steam for power generation, the produced coal gas has high quality, is a high-quality raw material for producing various chemical products such as synthetic ammonia, methanol, synthetic natural gas and the like, and can also be used as fuel gas for gas-steam combined cycle power generation, and the produced tar can be used for extracting high-value chemicals and simultaneously hydrogenating to prepare liquid fuel, so that various components in coal are effectively utilized, and the poly-generation comprehensive utilization of graded conversion and cascade utilization by taking the coal as a raw material is realized. The mutual fusion of the 150MW ultrahigh-pressure circulating fluidized bed boiler technology and the coal poly-generation technology is realized, the product series of the 150MW ultrahigh-pressure circulating fluidized bed boiler is enriched, and the market prospect is wide.

The utility model discloses a circulating fluidized bed fire burning furnace and fluidized bed gasifier coordinated operation well, the gasifier with fire material circulation reliable and stable between the burning furnace, the operation is adjusted conveniently. The circulating fluidized bed boiler can stably burn and utilize coal semicoke from the gasification furnace, and simultaneously can respectively adjust the loads of the combustion furnace and the gasification furnace according to the operation requirement.

The utility model discloses can stably produce tar and coal gas, coal gas purification and tar recovery system operation are normal, realize the automatic operation control of poly-generation system, and the operation is adjusted conveniently, and the coal gas high temperature electrostatic precipitator dust collection efficiency who builds is high, has guaranteed the low dust content of tar.

Description of the drawings:

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a top view of FIG. 1;

in the figure: 1. the device comprises a hearth, 2, a separator inlet flue, 3, a steam-cooling separator, 4, a separator outlet flue, 5, a water screen, 6, a high-temperature reheater, 7, a II-stage superheater, 8, a return valve, 9, a slag cooler, 10, a bed starting burner, 11, a steam-water separator, 12, an air preheater, 13, a hot air duct, 14, a wall-wrapped superheater, 15, a III-stage superheater, 16, a I-stage superheater, 17, a low-temperature reheater, 18, an economizer I, 19, a gasification furnace, 20, a I-stage separator, 21, a II-stage separator, 22 and a gasification furnace return valve.

The specific implementation mode is as follows:

example 1:

a150 MW ultra-high pressure CFB boiler with poly-generation comprises the following components: the device comprises a hearth 1, a steam-cooled separator 3 and a gasification furnace 19, wherein a steam-water separator 11 is connected between the hearth and the steam-cooled separator, a II-stage superheater 7, a high-temperature reheater 6 and a water-cooling screen 5 are sequentially connected in the upper space in the hearth and are all led out from the front of the furnace, a slag cooler 9 and a bed lower starting burner 10 are connected below the hearth, the slag cooler is led out towards the front of the furnace, the bed lower starting burner is led out towards the back of the furnace and is arranged below a separation feed back system and the gasification furnace, the steam-cooled separator is arranged between the hearth and a tail flue, the upper part of the steam-cooled separator is connected with the hearth through a separator inlet flue 2, the lower part of the steam-cooled separator is connected with the hearth through a feed back valve 8, and the steam-cooled separator is connected with a tail wrapping wall superheater 14 through a separator outlet flue 4;

the gasifier is arranged outside the steam-cooling separator and is sequentially connected with the I-grade separator 20 and the II-grade separator 21 through a gasifier outlet flue, the gasifier is connected with a return leg of a boiler separation return system and is connected with a boiler return valve inclined leg through a gasifier return valve 22, and the boiler return valve inclined leg is connected with the hearth.

Example 2:

according to embodiment 1 the 150MW superhigh pressure CFB boiler of area polygeneration, the package wall over heater arrange directly behind furnace, square package wall over heater central line also with boiler central line coincidence, the package wall over heater arrange for the single flue, from last to connecting gradually III level over heater 15, I level over heater 16, low temperature reheater 17 down, package wall over heater below from the top down connect gradually economizer I18, air heater 12, air heater pass through hot-blast main 13 and furnace and connect, its exhanst gas outlet and air inlet connect the flue gas system respectively.

Claims

1. A150 MW ultra-high pressure CFB boiler with poly-generation comprises the following components: furnace, vapour cold separator, gasifier, characterized by: a steam-water separator is connected between the hearth and the steam-cooling separator, a II-level superheater, a high-temperature reheater and a water-cooling screen are sequentially connected in the upper space in the hearth and are led out from the front of the furnace, a slag cooler and a below-bed starting burner are connected below the hearth, the slag cooler is led out towards the front of the furnace, the below-bed starting burner is led out towards the back of the furnace and is arranged below the separation feed back system and the gasification furnace, the steam-cooling separator is arranged between the hearth and the tail flue, the upper part of the steam-cooling separator is connected with the hearth through a separator inlet flue, the lower part of the steam-cooling separator is connected with the tail wrapping wall superheater through a separator outlet flue;

2. The 150MW ultra high pressure CFB boiler with poly-generation according to claim 1, wherein: the utility model discloses a boiler furnace, including a furnace, a wall superheater, an economizer I, an air heater, a wall superheater, a packet wall superheater center line and a boiler center line coincide, packet wall superheater arrange for single flue, from last to connecting gradually III level superheaters, I level superheaters, the low temperature reheater down, packet wall superheater below from the top down connect gradually economizer I, air heater pass through hot-blast main and furnace and connect, smoke outlet and air inlet connect the flue gas system respectively.