CN205288084U - Sweetener in circulating fluidized bed boiler stove - Google Patents

Sweetener in circulating fluidized bed boiler stove Download PDF

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Publication number
CN205288084U
CN205288084U CN201620035815.8U CN201620035815U CN205288084U CN 205288084 U CN205288084 U CN 205288084U CN 201620035815 U CN201620035815 U CN 201620035815U CN 205288084 U CN205288084 U CN 205288084U
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China
Prior art keywords
valve
injection apparatus
ejector
conveyer
outlet
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201620035815.8U
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Chinese (zh)
Inventor
虞永川
张凯
郑庆喜
卿洪坤
李叶凡
虞瑞鹤
瞿进
詹胡琴
马春花
陈学勇
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ZHENJIANG CITY POWER STATION AUXILIARY MACHINERY PLANT CO Ltd
Original Assignee
ZHENJIANG CITY POWER STATION AUXILIARY MACHINERY PLANT CO Ltd
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Application filed by ZHENJIANG CITY POWER STATION AUXILIARY MACHINERY PLANT CO Ltd filed Critical ZHENJIANG CITY POWER STATION AUXILIARY MACHINERY PLANT CO Ltd
Priority to CN201620035815.8U priority Critical patent/CN205288084U/en
Application granted granted Critical
Publication of CN205288084U publication Critical patent/CN205288084U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a sweetener in circulating fluidized bed boiler stove, includes limestone flour storehouse, conveyor, gas source device, injection apparatus, stokehold device, the lower extreme in the limestone flour storehouse is connected with conveyor, and conveyor, gas source device and injection apparatus UNICOM, injection apparatus is the tee bend structure, and injection apparatus's export and stokehold device are linked together. It is simple and crude that the interior desulfurization system configuration of traditional stove has been solved to this equipment, and it is serious to return gas, and the gas ash mixes inhomogeneously, reliability subalternation problem for desulfurization system is economical more, practical, reasonable in the stove, and system's reliability of operation also improves greatly.

Description

Desulphurization in circulating fluidized bed boiler equipment
Technical field
This utility model relates to a kind of powder material pneumatic conveying system device, particularly desulphurization in circulating fluidized bed boiler equipment.
Background technology
The advantages such as CFBB has efficiency height, fuel tolerance is wide, Load Regulation is flexible, good environmental protection, development in recent years is very fast, and technology reaches its maturity. Along with China is more and more higher to environmental requirement, the appearance of environmental protection electrovalence policy, the more domestic power plant having CFBB is promptly transforming or is newly adding desulphurization plant.
In recent years, some adopted the power plant of CFBB still to be requested resolutely to carry out boiler tail flue gas desulfurization by environmental administration, and the efficiency that main cause is exactly desulphurization in circulating fluidized bed boiler is open to suspicion. Traditional desulfuration in furnace system design and device fabrication make desulfuration efficiency low, and the consumption of desulfurization firming agent is considerable simultaneously, even if adopting cheap limestone desulfurization also to make cost of electricity-generating dramatically increase. In addition occurring in that the comprehensive utilization of boiler ash is subject to the impact of desulfurization firming agent kind, lime-ash can only be fallen by some power plant as waste.
Utility model content
The purpose of this utility model be in that to provide a kind of economic, practical, CFBB smoke desulfurization efficiency can be improved, can the desulphurization in circulating fluidized bed boiler equipment of qualified discharge.
For achieving the above object, this utility model desulphurization in circulating fluidized bed boiler equipment, including limestone powder bin, conveyer device, compressed air source unit, injection apparatus, stokehold device, it is characterized in that being connected to conveyer device in the lower end of limestone powder bin, conveyer device, compressed air source unit and injection apparatus UNICOM, injection apparatus is three-port structure, the outlet of injection apparatus is connected with stokehold device, described conveyer device is by hand operated gate valve, expansion joint, conveyer, surge bunker is sequentially connected logical, outlet at surge bunker is provided with rotatory feeder valve, described injection apparatus is ejector, the outlet of rotatory feeder valve is connected with ejector, described compressed air source unit is blower fan, intake valve is had between the air inlet and roots blower of ejector, described stokehold device is sequentially arranged with allotter in the outlet of burner hearth entrance Yu ejector, enter stove compensator, manual fast valve.
Having the exhaustor of a balance pressure reduction between surge bunker and feed valve, equipped with manual exhaust valve on exhaustor, exhaustor is direct and limestone powder bin UNICOM through air bleeding valve, equipped with manually blowing stifled valve on the conveyance conduit that injection apparatus couples with stokehold device.
Described conveyer is conveying worm, and the import of its conveyer can at top or horizontal level, and conveyor outlet is corresponding to level or lower position, makes the import and export of conveyer not on the same line.
Described ejector is three-port structure Venturi tube, two entrances are had in the front portion of ejector, one entrance receives the agstone that rotatory feeder valve provides, one entrance receives is provided compression air by blower fan, and two enter interruption-forming wind powder mixture flow through venturi throat and spray from the outlet of ejector.
The beneficial effects of the utility model:
Owing to adopting screw(-type) feeder, its import and export of pulverized limestone blanking is not on the same line, it is ensured that seals and does not tightly return gas, solves the problem that in traditional burner, desulphurization system blanking is not smooth. Solve desulphurization system configuration in traditional burner simple and crude, return gas serious, the problems such as the mixing of gas ash is uneven, poor reliability.
Feed valve employing aims at limestone and carries rotatory feeder valve, good airproof performance continuously, is applicable under the discharge pressure of 0.15MPa and runs; Can effectively solve conveying source of the gas to stokehold air-back; Blade is coated with tungsten carbide coating, and wearability is strong, it is adaptable to the medium that CaO content is higher; When after blade wear, at impeller axle without, under the premise of replacing, blade adjustment, replacing can be carried out easily.
The employing of gas ash mixing arrangement aims at limestone and carries venturi tube structure ejector continuously, utilizes the negative-pressure suction mode that combustion chamber draft is formed, both can guarantee that the entrance conveyance conduit of the continuous effective of agstone, can efficiently solve again air-back; Equipment setting height(from bottom) is low, resistance is little, long service life, can be used alone, use of also can connecting, and arrangement is flexible.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model desulphurization in circulating fluidized bed boiler equipment.
Detailed description of the invention
The structure of this utility model desulphurization in circulating fluidized bed boiler equipment is as shown in Figure 1. In every blind roaster, desulfurizer is provided with limestone powder bin 14, conveyer device, compressed air source unit, injection apparatus, stokehold device, conveyer device includes hand operated gate valve 1, expansion joint 2, conveying worm 3, surge bunker 4, and the outlet at surge bunker 4 sets a rotatory feeder valve 5; Injection apparatus is a three-port structure Venturi tube ejector 6; The exhaustor 15 of a balance pressure reduction is had between surge bunker 4 and feed valve 5, equipped with manual exhaust valve 9 on exhaustor 15, exhaustor 15 is direct and limestone powder bin 14 UNICOM through air bleeding valve 9, filling described conveyer with stokehold device on the conveyance conduit 16 that injection apparatus couples is conveying worm, the import of its conveyer can at top or horizontal level, conveyor outlet is corresponding to level or lower position, makes the import and export of conveyer not on the same line.
Have and manually blow stifled valve 10; Ejector 6 entrance is equipped with intake valve 7, and compressed air source unit is roots blower 8, and the porch of burner hearth 17 is also equipped with allotter 11, enters stove compensator 12, manual fast valve 13, enters stove compensator 12 and connects flexible compensation for pipeline.
Described ejector 6 is three-port structure Venturi tube, two entrances are had in the front portion of ejector, one entrance receives the agstone that rotatory feeder valve provides, one entrance receives and is provided compression air by roots blower, two enter interruption-forming wind powder mixture flow through venturi throat and spray from the outlet of ejector, replace conventional gas powder mixing arrangement, its operation principle is: pressure-air forms high-speed jet from jet expansion injection, surrounding air is entrainmented in high-speed jet, make to be formed in feed valve 5 negative pressure, agstone mixes with air smoothly, the size of negative pressure is relevant with air jet velocities and agstone mass flow with the ability of entrainmenting.Gas/solid biphase it is uniformly mixed at trunnion, by diffuser (diffuser), gas phase is slowed down, part kinetic energy is converted into pressure energy, the size of this pressure energy determines air conveying ability, utilize the negative pressure running environment in circulating fluid bed boiler, by primary mixture smooth delivery of power to burner hearth 17 simultaneously.
Described conveyer is conveying worm 3, the import of its conveyer can at top or horizontal level, conveyor outlet is corresponding to level or lower position, makes the import and export of conveyer not on the same line, and it is the mode exported that the present embodiment adopts top to be import, bottom.
Desulphurization in circulating fluidized bed boiler Optimized System Design scheme it is important that consolidation system design, solve induction system and return gas problem, optimize gas ash mixing arrangement, reasonable Arrangement burner hearth interface, select suitable desulfurization firming agent, ensure that CFBB smoke desulfurization efficiency more than 90%, flue gas can qualified discharge, lime-ash can comprehensively utilize, solve desulphurization system configuration in traditional burner simple and crude, return gas serious, the mixing of gas ash is uneven, the problems such as poor reliability, make desulfuration in furnace system more economically, practical, rationally, system reliability of operation is greatly improved.
Concrete operations flow process is as follows:
First system detects whether all valves are closed before running, and whether instrument bleed pressure is in the scope required. When all conditions meets, open into the manual fast valve 13 of stove, time delay a period of time opens intake valve 7, start roots blower 8, time delay a period of time opens the rotatory feeder valve 5 of surge bunker 4 outlet, time delay a period of time opens the conveying worm 3 of surge bunker 4 import, and agstone enters after ejector 6 mixes with conveying gas and enters conveyance conduit. Induction system starts, and agstone enters boiler furnace 17 and burns.
Being provided with on piping installation and blow stifled valve 10, when delivery system pressures exceedes setting value, system is blown stifled valve 10 and is opened, and manually blows stifled, when system pressure returns to normal value, closes and blows stifled valve 10.

Claims (4)

1. a desulphurization in circulating fluidized bed boiler equipment, including limestone powder bin, conveyer device, compressed air source unit, injection apparatus, stokehold device, it is characterized in that being connected to conveyer device in the lower end of limestone powder bin, conveyer device, compressed air source unit and injection apparatus UNICOM, injection apparatus is three-port structure, the outlet of injection apparatus is connected with stokehold device, described conveyer device is by hand operated gate valve, expansion joint, conveyer, surge bunker is sequentially connected logical, outlet at surge bunker is provided with rotatory feeder valve, described injection apparatus is ejector, the outlet of rotatory feeder valve is connected with ejector, described compressed air source unit is blower fan, intake valve is had between the air inlet and roots blower of ejector, described stokehold device is sequentially arranged with allotter in the outlet of burner hearth entrance Yu ejector, enter stove compensator, manual fast valve.
2. desulphurization in circulating fluidized bed boiler equipment according to claim 1, it is characterized in that the exhaustor having a balance pressure reduction between surge bunker and feed valve, equipped with manual exhaust valve on exhaustor, exhaustor is direct and limestone powder bin UNICOM through air bleeding valve, equipped with manually blowing stifled valve on the conveyance conduit that injection apparatus couples with stokehold device.
3. desulphurization in circulating fluidized bed boiler equipment according to claim 1, it is characterized in that described conveyer is conveying worm, the import of its conveyer can at top or horizontal level, conveyor outlet is corresponding to level or lower position, makes conveyer import and export not on the same line.
4. desulphurization in circulating fluidized bed boiler equipment according to claim 1, it is characterized in that described ejector is three-port structure Venturi tube, two entrances are had in the front portion of ejector, one entrance receives the agstone that rotatory feeder valve provides, one entrance receives is provided compression air by blower fan, and two enter interruption-forming wind powder mixture flow through venturi throat and spray from the outlet of ejector.
CN201620035815.8U 2016-01-15 2016-01-15 Sweetener in circulating fluidized bed boiler stove Expired - Fee Related CN205288084U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620035815.8U CN205288084U (en) 2016-01-15 2016-01-15 Sweetener in circulating fluidized bed boiler stove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620035815.8U CN205288084U (en) 2016-01-15 2016-01-15 Sweetener in circulating fluidized bed boiler stove

Publications (1)

Publication Number Publication Date
CN205288084U true CN205288084U (en) 2016-06-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105817136A (en) * 2016-06-03 2016-08-03 镇江京华电力环保工程公司 Desulphurization system in circulating fluidized bed boiler
CN108679602A (en) * 2018-05-18 2018-10-19 东南大学 Pressurized fluidized bed Secondary Air collaboration feeding equipment and method
CN111921365A (en) * 2020-06-18 2020-11-13 光大环境科技(中国)有限公司 Process system for simultaneously desulfurizing and denitrating
CN113546511A (en) * 2021-08-26 2021-10-26 房保忠 Biomass boiler afterbody low temperature spouts calcium sweetener

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105817136A (en) * 2016-06-03 2016-08-03 镇江京华电力环保工程公司 Desulphurization system in circulating fluidized bed boiler
CN108679602A (en) * 2018-05-18 2018-10-19 东南大学 Pressurized fluidized bed Secondary Air collaboration feeding equipment and method
CN108679602B (en) * 2018-05-18 2019-06-18 东南大学 Pressurized fluidized bed Secondary Air collaboration feeding device and method
CN111921365A (en) * 2020-06-18 2020-11-13 光大环境科技(中国)有限公司 Process system for simultaneously desulfurizing and denitrating
CN113546511A (en) * 2021-08-26 2021-10-26 房保忠 Biomass boiler afterbody low temperature spouts calcium sweetener

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160608

Termination date: 20170115