CN105180150A - Boiler superheated steam distribution and utilization system of papermaking production line - Google Patents
Boiler superheated steam distribution and utilization system of papermaking production line Download PDFInfo
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- CN105180150A CN105180150A CN201510396402.2A CN201510396402A CN105180150A CN 105180150 A CN105180150 A CN 105180150A CN 201510396402 A CN201510396402 A CN 201510396402A CN 105180150 A CN105180150 A CN 105180150A
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Abstract
The invention discloses a boiler superheated steam distribution and utilization system of a papermaking production line. The system is composed of a steam boiler and the papermaking production line. A superheater is arranged between a hearth and a cyclone separator. A coal economizer and an air preheater are installed in a flue. A steam pocket is connected to the superheater through a steam pipe. The papermaking production line is composed of a high-speed papermaking machine unit and a low-speed papermaking machine unit. Each high-speed papermaking machine is provided with a high-speed machine heat pump. Each low-speed papermaking machine is provided with a paper drying cylinder. A steam outlet of each high-speed papermaking machine and an exhaust pipe of the corresponding paper drying cylinder are connected with a steam recycling machine. An outlet pipe of the steam recycling machine is connected with an inlet pipe of the coal economizer. A superheated steam distributor is installed on a superheated steam outlet pipe of the superheater, and a high-pressure outlet pipe of the superheater is connected with a steam turbine. A low-pressure outlet pipe of the superheater is provided with a high-pressure gas valve and a low-pressure gas valve in parallel. The high-pressure gas valve is connected to a steam inlet of each high-speed papermaking machine. The low-pressure gas valve is connected with a steam inlet of each paper drying cylinder. A high-pressure gas outlet pipe of the steam turbine is connected with the steam inlet of each high-speed papermaking machine, and a low-pressure gas outlet pipe of the steam turbine is connected with the steam inlet of the paper drying cylinder of each low-speed papermaking machine.
Description
Technical field
The invention belongs to pulp technology for making paper, be specifically related to the allotment of a kind of paper production line boiler overheating steam and utilize system.
Background technology
At present, a lot of papermaking enterprise is all designed with high speed paper machine group and low-speed paper machine group, these enterprises adopt Industrial Boiler to papermaking unit supply high temperature and high pressure steam mostly, steam is after the heat pump of high speed machine or the drying cylinder of low speed paper machine, oven dry is carried out to the paper pulp film on filter screen and forms paper, the steam of discharging from the paper drying cylinder of high speed paper machine heat pump and low-speed paper machine flows into recycling machine, is transported to boiler again adds heat utilization by recycling machine.
Because high speed paper machine group and low-speed paper machine group often can not be in the state of operating at full capacity on a production line, some high speed paper machines or low-speed paper machine are often in stopped status, total gas consumption configuration that the air demand of enterprise's boiler needs when being generally and operating at full capacity according to all high speed paper machines of enterprise's production line and low-speed paper machine, when production line upper part high speed paper machine or low-speed paper machine are in stopped status, the superheated steam causing boiler to produce is excessive, overvoltage, excessive, the steam of overvoltage easily causes the quality of production of paper on supply air line damage and paper machine defective, for guaranteeing that high speed paper machine and low-speed paper machine can work under normal air pressure and tolerance, the mode to the steam in boiler overheating steam pipe is exhausted pressure release is adopted to process in prior art, this mode causes overvoltage steam to be wasted in a large number.
In order to avoid the superheated steam in boiler overheating steam pipe is wasted, the method that a lot of enterprise takes is the combustion position being regulated boiler by the control inlet amount of boiler furnace and the intake of Secondary Air, thus the steam delivery volume in control boiler-steam dome, but steam regulation quantity delivered in this way, the vary within wide limits of the intensity of a fire in boiler furnace, temperature fluctuation is large, be difficult to control in required scope, the vapor (steam) temperature of generation in drum and pressure is caused significantly to change, the normal needs produced can not be adapted to, the steam pressure produced when drum is excessive, steam in superheater tube needs outside pressure release, cause waste of steam, the steam pressure produced when drum is too low, the paper pulp film degree of drying on the paper machine dryer of operation can be made inadequate, product is caused to be wasted in a large number.
Summary of the invention
The invention provides the allotment of a kind of paper production line boiler overheating steam and utilize system, solve in prior art, total gas consumption required when papermaking enterprise boiler air demand is normally run by all units is configured, in actual production, all units can not use usually simultaneously, cause boiler air demand superfluous, surplus steam needs the process of outer excretion pressure, causes the problem of a large amount of waste of steam.
Technical scheme of the present invention is: a kind of paper production line boiler overheating steam allotment utilizes system, this system is primarily of steam boiler and paper production line two parts composition, the roof of the furnace of steam boiler communicates with cyclone separator top, in the passage that burner hearth is connected with cyclone separator, superheater is installed, cyclone separator bottom is connected with lower furnace portion, cyclone separator lower end is connected with returning charge blower fan by pipeline, cyclone separator upper end is connected with flue, economizer and air preheater are installed in flue, the smoke exhaust pipe of flue afterbody connects deduster, the pipe of deduster connects air-introduced machine, air-introduced machine connects chimney, primary air fan connects the top of air preheater, the discharge pipe on air preheater top connects the emulsion zone of burner hearth, overfire air fan connects the bottom of air preheater, the discharge pipe of air preheater bottom connects the dilute-phase zone of burner hearth, the drum of boiler is connected to the superheater in burner hearth by steam pipe, paper production line is primarily of high speed paper machine group and low-speed paper machine group two parts composition, high speed paper machine group is made up of multiple stage high speed paper machine, high speed paper machine is designed with high speed machine heat pump, high speed machine heat pump is provided with steam drive device, there is steam inlet one end of high speed machine heat pump, the other end has steam (vapor) outlet, low-speed paper machine group comprises multiple stage low-speed paper machine, low-speed paper machine is designed with paper drying cylinder, the steam (vapor) outlet of high speed paper machine is connected with recycling machine respectively with the blast pipe of the paper drying cylinder of low-speed paper machine, the pipe that goes out of recycling machine is connected with the pipe that enters of economizer, go out on pipe superheated steam distributor is installed at the superheated steam of superheater, the high blow-off pipe of superheated steam distributor connects steam turbine, low blow-off pipe is installed in parallel a high pressure gas valve and low pressure gas valve, high pressure gas valve receives the steam inlet of high speed paper machine, low pressure gas valve connects the steam inlet of the paper drying cylinder of low-speed paper machine, steam turbine is designed with high pressure gas go out pipe and low pressure gas go out manage, high pressure gas goes out the steam inlet that pipe connects high speed paper machine, low pressure gas goes out the steam inlet that pipe connects the paper drying cylinder of low-speed paper machine.
Adopt technical scheme of the present invention, overheated steam pipe between drum and paper machine is installed superheated steam distributor, superheated steam distributor is connected with steam turbine, when steam distributor detects that the superheated steam pressure of drum supply conforms to the steam pressure needed for papermaking unit, steam turns for papermaking unit by superheated steam distributor, when steam distributor detects that the superheated steam pressure of drum supply exceeds the steam pressure needed for papermaking unit, superheated steam turns and is fed to steam turbine by superheated steam distributor, pushing turbine generates electricity, after superheated steam cooling decompression in steam turbine completes acting generating, high speed machine heat pump is fed to by the high-pressure exhausting pipe of steam turbine, low-speed paper machine group is fed to by the low pressure comb of steam turbine.
Superheated steam due to surplus is fully utilized in steam turbine and generates electricity, thus avoid superheated steam by the wasting phenomenon of outer excretion pressure, allocate owing to there being superheated steam distributor and use overvoltage steam, boiler can work under stable normal condition, without the need to allocating its intensity of a fire, the fired state of boiler controls precise and stable, and its thermal efficiency is higher, greatly can save Coal-fired capacity; The steam of discharging due to superheated steam distributor and steam turbine can be limited within the scope of the temperature and pressure of required steam when papermaking unit normally works, and the stable working state of papermaking unit, the paper quality of production is higher.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Embodiment: as shown in Figure 1, a kind of paper production line boiler overheating steam allotment utilizes system, this system is primarily of steam boiler and paper production line two parts composition, burner hearth 1 top of steam boiler communicates with cyclone separator 23 top, in the passage that burner hearth 1 is connected with cyclone separator 23, superheater 2 is installed, cyclone separator 23 bottom is connected with burner hearth 1 bottom, cyclone separator 23 lower end is connected with returning charge blower fan 25 by pipeline, cyclone separator 23 upper end is connected with flue 24, economizer 22 and air preheater 21 are installed in flue 24, the smoke exhaust pipe of flue 24 afterbody connects deduster 14, the pipe of deduster 14 connects air-introduced machine 13, air-introduced machine 13 connects chimney 12, primary air fan 20 connects the top of air preheater 21, the discharge pipe on air preheater 21 top connects the emulsion zone of burner hearth 1, overfire air fan 19 connects the bottom of air preheater 21, the discharge pipe of air preheater 21 bottom connects the dilute-phase zone of burner hearth 1, the drum 3 of boiler is connected to the superheater 2 in burner hearth 1 by steam pipe, paper production line is primarily of high speed paper machine group and low-speed paper machine group two parts composition, high speed paper machine group is made up of multiple stage high speed paper machine, high speed paper machine is designed with high speed machine heat pump 17, high speed machine heat pump 17 is provided with steam drive device 18, there is steam inlet 15 one end of high speed machine heat pump 17, the other end has steam (vapor) outlet 16, low-speed paper machine group comprises multiple stage low-speed paper machine, low-speed paper machine is designed with paper drying cylinder 10, the steam (vapor) outlet 16 of high speed paper machine is connected with recycling machine 11 respectively with the blast pipe of the paper drying cylinder 10 of low-speed paper machine, the pipe that goes out of recycling machine 11 is connected with the pipe that enters of economizer 22, go out on pipe superheated steam distributor 4 is installed at the superheated steam of superheater 2, the high blow-off pipe of superheated steam distributor 4 connects steam turbine, low blow-off pipe is installed in parallel a high pressure gas valve 9 and low pressure gas valve 8, high pressure gas valve 9 receives the steam inlet 15 of high speed paper machine, low pressure gas valve 8 connects the steam inlet of the paper drying cylinder 10 of low-speed paper machine, steam turbine 5 is designed with high pressure gas and goes out pipe 7 and low pressure gas goes out pipe 6, high pressure gas goes out the steam inlet 15 that pipe 7 connects high speed paper machine, low pressure gas goes out the steam inlet that pipe 6 connects the paper drying cylinder 10 of low-speed paper machine.
Claims (1)
1. the allotment of paper production line boiler overheating steam utilizes system, this system is primarily of steam boiler and paper production line two parts composition, burner hearth (1) top of steam boiler communicates with cyclone separator (23) top, in the passage that burner hearth (1) is connected with cyclone separator (23), superheater (2) is installed, cyclone separator (23) bottom is connected with burner hearth (1) bottom, cyclone separator (23) lower end is connected with returning charge blower fan (25) by pipeline, cyclone separator (23) upper end is connected with flue (24), economizer (22) and air preheater (21) are installed in flue (24), the smoke exhaust pipe of flue (24) afterbody connects deduster (14), the pipe of deduster (14) connects air-introduced machine (13), air-introduced machine (13) connects chimney (12), primary air fan (20) connects the top of air preheater (21), the discharge pipe on air preheater (21) top connects the emulsion zone of burner hearth (1), overfire air fan (19) connects the bottom of air preheater (21), the discharge pipe of air preheater (21) bottom connects the dilute-phase zone of burner hearth (1), the drum (3) of boiler is connected to the superheater (2) in burner hearth (1) by steam pipe, paper production line is primarily of high speed paper machine group and low-speed paper machine group two parts composition, high speed paper machine group is made up of multiple stage high speed paper machine, high speed paper machine is designed with high speed machine heat pump (17), high speed machine heat pump (17) is provided with steam drive device (18), there is steam inlet (15) one end of high speed machine heat pump (17), the other end has steam (vapor) outlet (16), low-speed paper machine group comprises multiple stage low-speed paper machine, low-speed paper machine is designed with paper drying cylinder (10), the steam (vapor) outlet (16) of high speed paper machine is connected with recycling machine (11) respectively with the blast pipe of the paper drying cylinder (10) of low-speed paper machine, the pipe that goes out of recycling machine (11) is connected with the pipe that enters of economizer (22), it is characterized in that: go out on pipe superheated steam distributor (4) is installed at the superheated steam of superheater (2), the high blow-off pipe of superheated steam distributor (4) connects steam turbine, low blow-off pipe is installed in parallel a high pressure gas valve (9) and low pressure gas valve (8), high pressure gas valve (9) receives the steam inlet (15) of high speed paper machine, low pressure gas valve (8) connects the steam inlet of the paper drying cylinder (10) of low-speed paper machine, steam turbine (5) is designed with high pressure gas go out pipe (7) and low pressure gas go out manage (6), high pressure gas goes out the steam inlet (15) that pipe (7) connects high speed paper machine, low pressure gas goes out the steam inlet that pipe (6) connects the paper drying cylinder (10) of low-speed paper machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510396402.2A CN105180150A (en) | 2015-07-08 | 2015-07-08 | Boiler superheated steam distribution and utilization system of papermaking production line |
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| CN201510396402.2A CN105180150A (en) | 2015-07-08 | 2015-07-08 | Boiler superheated steam distribution and utilization system of papermaking production line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108486946A (en) * | 2018-05-14 | 2018-09-04 | 昆明纳太科技有限公司 | Monoblock type hot vapour drying cylinder and its system applied to UTILIZATION OF VESIDUAL HEAT IN |
| CN114808516A (en) * | 2022-04-15 | 2022-07-29 | 浙江金励环保纸业有限公司 | Energy-saving production line for gray board paper |
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| JP2005525526A (en) * | 2002-05-13 | 2005-08-25 | アンドリツ オサケユキチュア | Energy generation method in pulp mill |
| US20060236696A1 (en) * | 2005-04-22 | 2006-10-26 | Andritz Oy | Apparatus and method for producing energy at a pulp mill |
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| CN204829873U (en) * | 2015-07-08 | 2015-12-02 | 云南汉光纸业有限公司 | Allotment of papermaking production line boiler superheated steam utilizes system |
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2015
- 2015-07-08 CN CN201510396402.2A patent/CN105180150A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2002097243A1 (en) * | 2001-05-29 | 2002-12-05 | Andritz Oy | Method and arrangement for producing electrical energy at a pulp mill |
| JP2005525526A (en) * | 2002-05-13 | 2005-08-25 | アンドリツ オサケユキチュア | Energy generation method in pulp mill |
| US20060236696A1 (en) * | 2005-04-22 | 2006-10-26 | Andritz Oy | Apparatus and method for producing energy at a pulp mill |
| CN102677530A (en) * | 2012-05-13 | 2012-09-19 | 王性仁 | Low-carbon papermaking method |
| CN102864674A (en) * | 2012-09-17 | 2013-01-09 | 哈尔滨工业大学 | Device and method for recycling gasified and burned alkali for straw pulp papermaking black liquor circulating fluidized bed |
| CN102980201A (en) * | 2012-12-18 | 2013-03-20 | 中国轻工业武汉设计工程有限责任公司 | Mixed fit device for biomass fuel, paper sludge and coals |
| CN204829873U (en) * | 2015-07-08 | 2015-12-02 | 云南汉光纸业有限公司 | Allotment of papermaking production line boiler superheated steam utilizes system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108486946A (en) * | 2018-05-14 | 2018-09-04 | 昆明纳太科技有限公司 | Monoblock type hot vapour drying cylinder and its system applied to UTILIZATION OF VESIDUAL HEAT IN |
| CN114808516A (en) * | 2022-04-15 | 2022-07-29 | 浙江金励环保纸业有限公司 | Energy-saving production line for gray board paper |
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Application publication date: 20151223 |