CN102183006A - High-temperature high-pressure temperature-reducing pressure-reducing device capable of being started and stopped rapidly - Google Patents
High-temperature high-pressure temperature-reducing pressure-reducing device capable of being started and stopped rapidly Download PDFInfo
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- CN102183006A CN102183006A CN201010621964XA CN201010621964A CN102183006A CN 102183006 A CN102183006 A CN 102183006A CN 201010621964X A CN201010621964X A CN 201010621964XA CN 201010621964 A CN201010621964 A CN 201010621964A CN 102183006 A CN102183006 A CN 102183006A
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Abstract
The invention relates to a high-temperature high-pressure temperature-reducing pressure-reducing device capable of being started and stopped rapidly. The device comprises a pneumatic actuating mechanism, a steam mixing pipeline and a pressure-reducing valve, wherein the steam mixing pipeline is connected with a steam inlet and a steam outlet; the pressure-reducing valve is composed of a valve body, a valve plug, a valve seat and an upper valve cover; and a water-supplying temperature-reducing system, a safety protection system and a dewatering system are arranged on the steam mixing pipeline. The device provided by the invention has the beneficial effects that the device is a steam temperature-reducing pressure-reducing system which is connected in parallel with a steam turbine, can introduce steam generated by the boiler to a steam pipeline or a condenser of the next stage pressure and temperature, the device has the functions of rapid starting and stopping, safe overflowing, safe protection and the like, and is mainly applied to industrial fields, such as a thermal power unit, the coal chemical industry and the coal oil.
Description
Technical field
The present invention relates to the large-sized boiler field, especially a kind of fast opening and closing HTHP reducing-and-cooling plant.
Background technology
Along with the fast development of modern large-sized boiler, unit enters the new period of big capacity, high parameter, variation, increasingly automated development.Coal Chemical Industry, coal system wet goods industrial circle need utilize the reducing-and-cooling plant of the Boiler Steam of big capacity, high parameter through fast opening and closing, satisfy the needs of process system.Conventional high-temperature high pressure reducing-and-cooling plant because open and close slowly, noise is high, vibration is big and the security reliability difference can not satisfy the requirement of its process system.
Summary of the invention
The present invention will solve the shortcoming of above-mentioned prior art, and a kind of safe and reliable fast opening and closing HTHP reducing-and-cooling plant is provided.
The present invention solves the technical scheme that its technical problem adopts: this fast opening and closing HTHP reducing-and-cooling plant; comprise pneumatic actuator; the vapor mixing pipeline that connects steam inlet and steam (vapor) outlet; by the pressure-reducing valve that valve body, spool, valve seat, bonnet, are formed, also be provided with feedwater temperature reducing system, safety system and draining system on the vapor mixing pipeline.
As preferably, described pressure-reducing valve end is provided with the porous silencer cover, plays the second depressurized effect.
As preferably, be respectively equipped with asbestos gas ket, four between described bonnet, and the valve body and open annulus and back-up ring, play sealing function.
As preferably, be provided with airtight and watertight padding and filler spacer ring between described bonnet, and the spool, can prevent that medium from leaking.
As preferably, described pressure-reducing valve front end is provided with heat radiation rack, plays thermolysis.
As preferably, described feedwater temperature reducing system comprises the Venturi tube of being located in the vapor mixing pipeline, be connected with adjustable nozzle on the Venturi tube, adjustable nozzle is connected with the desuperheat water pipe of supplying with desuperheating water, be respectively equipped with check-valves, labyrinth type feed-regulating valve, choke valve and stop valve II on the desuperheat water pipe, adopt the mode of coarse adjustment and fine tuning combination, reach temperature lowering effect.
As preferably, described safety system comprises a spring safety valve that connects vapor mixing pipeline stage casing, and spring safety valve is connected with evacuation port, and Pressure gauge and bimetallic thermometer also are housed on the vapor mixing pipeline, to guarantee the safe operation of reducing-and-cooling plant.
As preferably, described draining system comprises the drain pipe that connects vapor mixing pipeline latter end, and drain pipe is provided with drain valve and stop valve I, condensate water hydrops in the remover, the safety when guaranteeing to start.
The effect that the present invention is useful is: one, adopt hydraulic pressure or pneumatic actuator, make control reliable, quick, accurate; Two, adopt the back desuperheat that reduces pressure earlier to divide body structure, avoid the alternate stress of material, improve security reliability; Three, adopt single seat plunger and porous silencer cover second depressurized version, have characteristics such as noise is low, vibrations are little, tightness good, the parameter adjustable extent is big; Four, the steam attemperation process is to adopt the labyrinth type control valve to realize coarse adjustment, with the high velocity vapor mixed aerosol, reaches the cooling purpose through the desuperheating water of coarse adjustment is sprayed into the Venturi tube of mixing duct by adjustable nozzle in; Five, valve body adopts the smithwelding structure, guarantees that valve is durable in use, reaches projected life more than 30 years; Six, adopt the major diameter valve rod, valve rod and flap integral structure, intensity is good, anti-vibration, long service life; Seven, valve seat and flap sealing surface weld deposit carbide alloy, layer thickness is big, increases the service life; Eight, sealing surface is strict grinds and polishing, and adopts uneven formula seal spool, guarantees that valve uses nothing to leak for a long time.Generally speaking; this product is the steam temperature reducing and pressure reducing system in parallel with steam turbine; its effect is jet chimney or a condenser of the steam that boiler produces being guided to the next stage pressure and temperature without steam turbine; have major functions such as fast opening and closing, safe overflow and safeguard protection, be mainly used in fired power generating unit, Coal Chemical Industry, coal system wet goods industrial circle.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the cutaway view of pressure-reducing valve;
Fig. 3 is a pressure and temperature reducing therrmodynamic system flow chart;
Description of reference numerals: pressure-reducing valve 1, Venturi tube 2, adjustable nozzle 3, check-valves 4, spring safety valve 5, vapor mixing pipeline 6, Pressure gauge 7, bimetallic thermometer 8, drain valve 9, stop valve I10, stop valve II11, choke valve 12, labyrinth type feed-regulating valve 13, steam inlet 14, steam (vapor) outlet 15, pneumatic actuator 16, heat radiation rack 17, spool 18, airtight and watertight padding 19, filler spacer ring 20, back-up ring 21, four open annulus 22, asbestos gas ket 23, bonnet, 24, valve seat 25, valve body 26, porous silencer cover 27, desuperheat water pipe 28, drain pipe 29, evacuation port 30.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing:
Embodiment: as Fig. 1; plant fast opening and closing HTHP reducing-and-cooling plant; comprise pneumatic actuator 16; the vapor mixing pipeline 6 that connects steam inlet 14 and steam (vapor) outlet 15; the pressure-reducing valve of forming by valve body 26, spool 18, valve seat 25, bonnet, 24 1; wherein spool 18 is valve rod and flap one, also is provided with feedwater temperature reducing system, safety system and draining system on the vapor mixing pipeline 6.
As Fig. 2, wherein pressure-reducing valve 1 end is provided with porous silencer cover 27, is respectively equipped with asbestos gas ket 23, four between bonnet, 24 and the valve body 26 and opens annulus 22 and back-up ring 21.Be provided with airtight and watertight padding 19 and filler spacer ring 20 between bonnet, 24 and the spool 18.Pressure-reducing valve 1 front end is provided with heat radiation rack 17.Pressure-reducing valve 1 adopts the smithwelding structure, angie type, and single seat plunger and porous silencer cover second depressurized version had both reduced the valve leak amount, increased the decompression amplitude, played the reduction noise effects again.It is by pressure transmitter and adjuster that the pressure and temperature of reducing-and-cooling plant is regulated, handle by pneumatic actuator 16 again, drive and the valve rod that pressure-reducing valve 1 flap links to each other move up and down flap in valve seat 25, to change the purpose that the medium circulation area reaches the expenditure and pressure desuperheat.
Described feedwater temperature reducing system comprises the Venturi tube of being located in the vapor mixing pipeline 62, be connected with adjustable nozzle 3 on the Venturi tube 2, adjustable nozzle 3 is connected with the desuperheat water pipe 28 of supplying with desuperheating water, is respectively equipped with check-valves 4, labyrinth type feed-regulating valve 13, choke valve 12 and stop valve II11 on the desuperheat water pipe 28.The steam attemperation process is to adopt labyrinth type feed-regulating valve 13 to realize coarse adjustment earlier, utilize the automatic atomizing umbrella adjustable nozzle 3 of the employing rotary-jet technology that is provided with in the Venturi tube 2 to carry out fine tuning, make the desuperheating water jet velocity keep constant, utilize the higher steam flow rate of Venturi tube 2 throats simultaneously, reach best atomizing effect, satisfy the needs of big variable working condition, flow adjustment range can reach 4%～100%.
Be calculated as the heating power calculating that principle is carried out each operating mode and load with material balance and adiabatic constant enthalpy.The main purpose that heating power calculates is to determine to enter the inlet steam flow D of reducing-and-cooling plant
ZqWith spray water flux D
PsAccording to Fig. 3, it is as follows to list its material balance formula and thermal balance type:
Simultaneous (1) and (2) two formulas can be tried to achieve spray water flux D
PsWith steam flow D
Zq:
Wherein: D
PsBe desuperheating water consumption (kg/h), D
ZqBe inlet steam consumption (kg/h), D
JwyBe outlet steam production (kg/h),
Be evaporation section portion not in the desuperheating water, h
0Be inlet steam enthalpy (kJ/kg), h
JwyBe outlet steam enthalpy, h
PsBe desuperheating water enthalpy, h '
JwyBe the saturation water enthalpy behind the pressure and temperature reducing.
Safety system comprises a spring safety valve 5 that connects vapor mixing pipeline 6 stage casings; spring safety valve 5 is connected with evacuation port 30; Pressure gauge 7 and bimetallic thermometer 8 also are housed on the vapor mixing pipeline 6; when the pressure in the jet chimney exceeds permissible value; steam is arranged in atmosphere; the interior steam pressure of pipeline is remained in the permissible value, to guarantee the safe operation of reducing-and-cooling plant and gas utilization unit.
Draining system comprises the drain pipe 29 that connects vapor mixing pipeline 6 latter ends, and drain pipe 29 is provided with drain valve 9 and stop valve I10, and its effect is a condensate water hydrops in the remover, prevents jet chimney generation water hammer or water hammer, the safety when assurance device starts.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (8)
1. fast opening and closing HTHP reducing-and-cooling plant; comprise pneumatic actuator (16); the vapor mixing pipeline (6) that connects steam inlet (14) and steam (vapor) outlet (15); pressure-reducing valve (1) by valve body (26), spool (18), valve seat (25), bonnet, (24) are formed is characterized in that: also be provided with feedwater temperature reducing system, safety system and draining system on the vapor mixing pipeline (6).
2. fast opening and closing HTHP reducing-and-cooling plant according to claim 1 is characterized in that: described pressure-reducing valve (1) end is provided with porous silencer cover (27).
3. fast opening and closing HTHP reducing-and-cooling plant according to claim 1 and 2 is characterized in that: be respectively equipped with asbestos gas ket (23), four between described bonnet, (24) and the valve body (26) and open annulus (22) and back-up ring (21).
4. fast opening and closing HTHP reducing-and-cooling plant according to claim 1 and 2 is characterized in that: be provided with airtight and watertight padding (19) and filler spacer ring (20) between described bonnet, (24) and the spool (18).
5. fast opening and closing HTHP reducing-and-cooling plant according to claim 1 and 2 is characterized in that: described pressure-reducing valve (1) front end is provided with heat radiation rack (17).
6. fast opening and closing HTHP reducing-and-cooling plant according to claim 1, it is characterized in that: described feedwater temperature reducing system comprises the Venturi tube of being located in the vapor mixing pipeline (6) (2), be connected with adjustable nozzle (3) on the Venturi tube (2), adjustable nozzle (3) is connected with the desuperheat water pipe (28) of supplying with desuperheating water, is respectively equipped with check-valves (4), labyrinth type feed-regulating valve (13), choke valve (12) and stop valve II (11) on the desuperheat water pipe (28).
7. fast opening and closing HTHP reducing-and-cooling plant according to claim 1; it is characterized in that: described safety system comprises a spring safety valve (5) that connects vapor mixing pipeline (6) stage casing; spring safety valve (5) is connected with evacuation port (30), and Pressure gauge (7) and bimetallic thermometer (8) also are housed on the vapor mixing pipeline (6).
8. fast opening and closing HTHP reducing-and-cooling plant according to claim 1 is characterized in that: described draining system comprises the drain pipe (29) that connects vapor mixing pipeline (6) latter end, and drain pipe (29) is provided with drain valve (9) and stop valve I (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010621964XA CN102183006A (en) | 2010-12-28 | 2010-12-28 | High-temperature high-pressure temperature-reducing pressure-reducing device capable of being started and stopped rapidly |
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| CN201010621964XA CN102183006A (en) | 2010-12-28 | 2010-12-28 | High-temperature high-pressure temperature-reducing pressure-reducing device capable of being started and stopped rapidly |
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| CN201010621964XA Pending CN102183006A (en) | 2010-12-28 | 2010-12-28 | High-temperature high-pressure temperature-reducing pressure-reducing device capable of being started and stopped rapidly |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434781A (en) * | 2011-12-02 | 2012-05-02 | 杭州华惠阀门有限公司 | Temperature-reducing and pressure-reducing system |
| CN105698006A (en) * | 2016-03-25 | 2016-06-22 | 吴忠仪表有限责任公司 | Integrated temperature-reducing and pressure-reducing device |
| CN107489801A (en) * | 2017-09-21 | 2017-12-19 | 安徽荣达阀门有限公司 | A kind of high sensitivity steam valve |
| CN107906368A (en) * | 2017-12-08 | 2018-04-13 | 杭州华惠阀门有限公司 | A kind of reducing-and-cooling plant |
| CN108592137A (en) * | 2018-07-13 | 2018-09-28 | 大连亨利测控仪表工程有限公司 | A kind of thermal power plant's flexibility transformation twin-tub decoupling depth peak regulation system |
| CN108913202A (en) * | 2018-08-16 | 2018-11-30 | 北京航天石化技术装备工程有限公司 | A kind of skid depressurized system |
| CN108916652A (en) * | 2018-08-16 | 2018-11-30 | 北京航天石化技术装备工程有限公司 | A kind of thermodynamic equilibrium system of depressurized system |
| CN108939597A (en) * | 2018-06-29 | 2018-12-07 | 青海盐湖工业股份有限公司 | A kind of not pure steam collection condensing plant |
| CN110553147A (en) * | 2018-05-30 | 2019-12-10 | 石家庄市滕泰环保设备有限公司 | superheated steam cooling and pressure reducing system and method |
| CN111577690A (en) * | 2020-04-01 | 2020-08-25 | 武汉船用机械有限责任公司 | Hydraulic control valve group |
| CN112682827A (en) * | 2021-01-11 | 2021-04-20 | 北京京诚科林环保科技有限公司 | Coal gas power generation double-desuperheating water heating system and method |
| CN113008586A (en) * | 2021-02-14 | 2021-06-22 | 梅晓靖 | Detection device for reducing temperature and pressure |
| CN113446517A (en) * | 2021-06-25 | 2021-09-28 | 江苏盐阜电站阀门辅机制造有限公司 | Saturated steam type temperature and pressure reducing device |
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| CN1050082A (en) * | 1989-08-24 | 1991-03-20 | 基斯通国际集团公司 | The decompression and the modulating valve that have improved |
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| CN201162947Y (en) * | 2008-02-22 | 2008-12-10 | 杭州华惠阀门有限公司 | Attemperation and pressure reducing device |
| CN201225515Y (en) * | 2008-06-19 | 2009-04-22 | 建德市恒洋化工厂 | Drainage device of steam heating system |
| CN202008126U (en) * | 2010-12-28 | 2011-10-12 | 杭州华惠阀门有限公司 | Quickly opened and closed high-temperature high-pressure temperature and pressure reduction device |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1050082A (en) * | 1989-08-24 | 1991-03-20 | 基斯通国际集团公司 | The decompression and the modulating valve that have improved |
| WO1995015810A1 (en) * | 1993-12-09 | 1995-06-15 | Keystone International Holdings Corp. | Steam conditioning butterfly valve |
| CN1731002A (en) * | 2005-08-03 | 2006-02-08 | 南京汉唐机电设计研究有限公司 | Desuperheating and decompressing device for steam |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434781A (en) * | 2011-12-02 | 2012-05-02 | 杭州华惠阀门有限公司 | Temperature-reducing and pressure-reducing system |
| CN105698006A (en) * | 2016-03-25 | 2016-06-22 | 吴忠仪表有限责任公司 | Integrated temperature-reducing and pressure-reducing device |
| CN105698006B (en) * | 2016-03-25 | 2018-06-22 | 吴忠仪表有限责任公司 | Integral type reducing-and-cooling plant |
| CN107489801A (en) * | 2017-09-21 | 2017-12-19 | 安徽荣达阀门有限公司 | A kind of high sensitivity steam valve |
| CN107489801B (en) * | 2017-09-21 | 2019-03-26 | 安徽荣达阀门有限公司 | A kind of high sensitivity steam valve |
| CN107906368A (en) * | 2017-12-08 | 2018-04-13 | 杭州华惠阀门有限公司 | A kind of reducing-and-cooling plant |
| CN110553147A (en) * | 2018-05-30 | 2019-12-10 | 石家庄市滕泰环保设备有限公司 | superheated steam cooling and pressure reducing system and method |
| CN108939597A (en) * | 2018-06-29 | 2018-12-07 | 青海盐湖工业股份有限公司 | A kind of not pure steam collection condensing plant |
| CN108939597B (en) * | 2018-06-29 | 2020-11-10 | 青海盐湖工业股份有限公司 | Impure steam collecting and condensing equipment |
| CN108592137A (en) * | 2018-07-13 | 2018-09-28 | 大连亨利测控仪表工程有限公司 | A kind of thermal power plant's flexibility transformation twin-tub decoupling depth peak regulation system |
| CN108916652A (en) * | 2018-08-16 | 2018-11-30 | 北京航天石化技术装备工程有限公司 | A kind of thermodynamic equilibrium system of depressurized system |
| CN108913202A (en) * | 2018-08-16 | 2018-11-30 | 北京航天石化技术装备工程有限公司 | A kind of skid depressurized system |
| CN108916652B (en) * | 2018-08-16 | 2023-11-21 | 北京航天石化技术装备工程有限公司 | Thermodynamic equilibrium system of decompression system |
| CN111577690A (en) * | 2020-04-01 | 2020-08-25 | 武汉船用机械有限责任公司 | Hydraulic control valve group |
| CN112682827A (en) * | 2021-01-11 | 2021-04-20 | 北京京诚科林环保科技有限公司 | Coal gas power generation double-desuperheating water heating system and method |
| CN113008586A (en) * | 2021-02-14 | 2021-06-22 | 梅晓靖 | Detection device for reducing temperature and pressure |
| CN113008586B (en) * | 2021-02-14 | 2023-07-14 | 国能河北龙山发电有限责任公司 | Detection device for temperature and pressure reduction |
| CN113446517A (en) * | 2021-06-25 | 2021-09-28 | 江苏盐阜电站阀门辅机制造有限公司 | Saturated steam type temperature and pressure reducing device |
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