CN102798113A - Steam manufacturing device and operation method thereof - Google Patents

Steam manufacturing device and operation method thereof Download PDF

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Publication number
CN102798113A
CN102798113A CN201210055101XA CN201210055101A CN102798113A CN 102798113 A CN102798113 A CN 102798113A CN 201210055101X A CN201210055101X A CN 201210055101XA CN 201210055101 A CN201210055101 A CN 201210055101A CN 102798113 A CN102798113 A CN 102798113A
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China
Prior art keywords
heat
supply water
steam
loses
compressor
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CN201210055101XA
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Chinese (zh)
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关山和英
西村真
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Kobe Steel Ltd
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Kobe Steel Ltd
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Publication of CN102798113A publication Critical patent/CN102798113A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/16—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
    • F22D5/26—Automatic feed-control systems

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The invention provides a steam manufacturing device and an operation method thereof, which enable the moisture of the steam flowed into a compressor to be constant. The steam manufacturing device comprises a heat exchanger (30) enabling the supplied water to be evaporated by transmitting the heat of a heat exchange medium, the compressor (40) compressing the steam, a flow adjusting valve (21) and a control device (50). The control device (50) obtains the necessary heat (Q2) by multiplying the sensible heat from a supplying temperature to a vaporization temperature of the supplied water by the water supplying quantity of the supplied water and a predetermined dryness threshold value, and compares the necessary heat (Q2) with the loss heat (Q1) lost by the heat exchange of the heat exchange medium, and when the necessary heat (Q2) excesses the loss heat (Q1), uses the flow adjusting valve (21) to throttle to thereby reduce the water supplying quantity of the supplied water; and when the necessary heat (Q2) is lower than the loss heat (Q1), increases the degree of opening of the flow adjusting valve (21) to thereby increase the water supplying quantity of the supplied water.

Description

Steam manufacturing installation and method of operation thereof
Technical field
The present invention relates to utilize used heat to make the steam manufacturing installation and the method for operation thereof of steam.
Background technology
In the past, known had a kind of steam manufacturing installation, and it utilizes the hot water of discharging from heat resource equipments such as factories to make low-pressure steam, and this low-pressure steam is boosted, thereby can enlarge the purposes of used heat.This steam manufacturing installation possesses heat exchanger and compressor, and the heat of the hot water that in heat exchanger, will discharge from heat resource equipment makes to supplying with the water transmission supplies with the water evaporation, and the steam of generation is by compressor compresses and to conveyings such as steam utilization equipment.
Yet; Make in the device of steam from the used heat of heat resource equipment being used to; Because the temperature and the flow of the hot water of discharging change all the time, therefore in heat exchanger, also change to the heat of supplying with the water transmission, thereby the amount of moisture that contains in the steam of making increases and decreases from hot water.When from hot water to supplying with heat that water transmits hour, in the steam that flows into compressor, can sneak into superfluous moisture, thereby the mass dryness fraction of compressor suction inlet side (the gas phase ratio in the steam) diminishes, compressor may be damaged.In addition, when from hot water to supplying with heat that water transmits when excessive (when becoming superheat state), at this moment flow into the amount of moisture that contains in the steam of compressor and tail off, big thereby the mass dryness fraction of compressor suction inlet side becomes, the spray volume of the steam that obtains through compressor reduces.
Therefore, in order to solve above-mentioned problem, known have a kind of steam generating system, and it controls (for example, patent documentation 1) to the amount of moisture that contains in the steam that flows into compressor.The steam generating system of record is the device that possesses the pipe arrangement of bleeding in the patent documentation 1; This pipe arrangement of bleeding is extracted steam out and the steam heat exchanger is guided from compressor or steam supplying tubing; A part of heat exchanger of the steam that this steam generating system will obtain through compressor is carried; Thus the amount of moisture in the steam is kept constant, thereby make the compressor runs steadily.
Patent documentation 1: No. 4281770 communiques of Japan Patent
Yet, in the steam manufacturing installation that patent documentation 1 is put down in writing, because a part of heat exchanger guiding of the steam that will obtain through compressor, the problem that therefore exists the quantity of steam that can be used in steam utilization facility etc. to reduce.
Summary of the invention
Therefore; The present invention is in view of above-mentioned problem; Its purpose is to provide a kind of will flow into that the amount of moisture that contains in the steam of compressor keeps constant and the stability that improves compressor, and can the steam that obtain through compressor all be used in steam manufacturing installation and the method for operation thereof that steam uses facility etc.
In order to solve above-mentioned problem, steam manufacturing installation of the present invention possesses: first stream that the heat exchange medium of discharging from thermal source flows; Supply with second stream of water flows; The heat of said heat exchange medium is made the heat exchanger of said supply water evaporation to the transmission of said supply water; Steam in said heat exchanger, generating carries out compressor for compressing; Said steam manufacturing installation is characterised in that; Flow rate regulating valve and the control device of controlling said flow rate regulating valve with supply water yield of the said supply water of adjustment; Said control device is obtained necessary heat with the threshold value that the sensible heat from the supplying temperature to the evaporating temperature and the evaporation latent heat sum under the said evaporating temperature of said supply water multiply by the said supply water yield and predefined mass dryness fraction; Said control device compares because of the loses heat that heat exchange loses said necessary heat and said heat exchange medium; When said necessary heat surpasses said loses heat; Make said flow rate regulating valve throttling and reduce the supply water yield of said supply water, when said necessary heat is lower than said loses heat, increases the aperture of said flow rate regulating valve and increase the supply water yield of said supply water.
Through this structure; Can be with the amount of moisture that flows into the steam in the compressor, be that the mass dryness fraction of compressor suction inlet side keeps constant; Therefore take place damagedly because of sneaking into superfluous moisture compressor in the steam that enough prevents to flow into compressor, the amount of moisture that perhaps flows into the steam in the compressor reduces and the situation of the spray volume minimizing of the steam that obtains through compressor.In addition, owing to do not need the steam heat exchanger guiding that will obtain through compressor, therefore can the steam that obtain all be utilized in steam and use in the facility etc.
In addition, in the present invention, preferably through the said heat exchanger upstream side of said second stream, and said heat exchanger and said compressor between thermometer is set, try to achieve the supplying temperature and the evaporating temperature of said supply water.Through this structure, can measure supplying temperature and the evaporating temperature of supplying with water, therefore can calculate necessary heat easily.
In addition, in the present invention, the supplying temperature of preferred said supply water and evaporating temperature are the setting values that preestablishes in said control device.Through this structure, need not measure supplying temperature and evaporating temperature and just can calculate necessary heat.
In addition, in the method for operation of steam manufacturing installation of the present invention, said steam manufacturing installation possesses: first stream that the heat exchange medium of discharging from thermal source flows; Supply with second stream of water flows; The heat of said heat exchange medium is made the heat exchanger of said supply water evaporation to the transmission of said supply water; Steam in said heat exchanger, generating carries out compressor for compressing; The method of operation of said steam manufacturing installation is characterised in that, comprising: the supply water yield that the sensible heat from the supplying temperature to the evaporating temperature and the evaporation latent heat sum under the said evaporating temperature of said supply water multiply by said supply water and the threshold value of predefined mass dryness fraction are obtained the necessary heat of necessary heat and are calculated operation; Obtain the loses heat of the heat that said heat exchange medium loses because of heat exchange and calculate operation; Compare calculating the necessary heat of calculating in the step at said necessary heat and calculating the loses heat of calculating in the operation in said loses heat; When said necessary heat surpasses said loses heat; Make the said supply water of adjustment the supply water yield the flow rate regulating valve throttling and reduce the supply water yield of said supply water; When said necessary heat is lower than said loses heat, increases the aperture of said flow rate regulating valve and increase the flow-control operation of the supply water yield of said supply water.
The invention effect
According to the present invention; A kind of steam manufacturing installation that utilizes waste gas to make steam can be provided; Even will not guide through the steam heat exchanger that compressor obtains; Also can the amount of moisture that flow into the steam in the compressor be kept constant, improve the stability of compressor, and can the steam that obtain through compressor all be utilized in steam and use in the facility etc.
Description of drawings
Fig. 1 is the sketch of first embodiment of expression steam manufacturing installation of the present invention.
Fig. 2 is the flow chart of the method for operation of steam manufacturing installation shown in Figure 1.
Fig. 3 is the sketch of the variation of expression steam manufacturing installation of the present invention.
Symbol description:
1 steam manufacturing installation
10 first streams
10a, 10b pipe arrangement
The 11f flowmeter
12t, 13t thermometer
20 second streams
20a, 20b, 20c pipe arrangement
21 flow rate regulating valves
The 22f flowmeter
23t, 24t thermometer
30 heat exchangers
40 compressors
41 compressor suction inlet sides
50 control device
The specific embodiment
Below, with reference to accompanying drawing, the mode that is used for embodiment of the present invention is described.Fig. 1～Fig. 2 representes first embodiment of steam manufacturing installation of the present invention, and Fig. 1 representes the sketch of first embodiment.Steam manufacturing installation 1 of the present invention is made up of first stream 10, second stream 20, heat exchanger 30, compressor 40, control device 50 etc.
At first, the briefing to the manufacturing of steam describes.Never the heat resource equipment of illustrated factory etc. the hot water (heat exchange medium) of discharging flows in first stream 10, supplies with water and in second stream 20, flows.And in heat exchanger 30, the heat of the hot water of discharging from heat resource equipment makes and supplies with the water evaporation to supplying with the water transmission.Afterwards, the steam that in heat exchanger 30, generates is compressed by compressor 40, and to not shown conveyings such as steam utilization facility.
(first stream)
First stream 10 is made up of pipe arrangement 10a, pipe arrangement 10b, and its two ends are connected with not shown heat resource equipment with heat exchanger 30 respectively.The hot water of discharging from heat resource equipment is in the internal flow of first stream 10, and hot water at first flows into pipe arrangement 10a, and flows out from pipe arrangement 10b through heat exchanger 30.Be provided with the thermometer 12t of flowmeter 11f and the supplying temperature of measuring hot water at the pipe arrangement 10a place of the upstream side that is positioned at heat exchanger 30, be provided with the hot water temperature's after measuring heat exchange thermometer 13t at the pipe arrangement 10b place in the downstream that is positioned at heat exchanger 30.In this embodiment, thermometer 11f is arranged at pipe arrangement 10a, but also can be arranged at pipe arrangement 10b.In addition, the heat exchange medium of discharging from thermal source uses hot water, but heat exchange medium also can be oil or gas etc.
(second stream)
Second stream 20 is made up of three pipe arrangements (pipe arrangement 20a, pipe arrangement 20b, pipe arrangement 20c); Pipe arrangement 20a two ends are connected with the device that supply water is provided with heat exchanger 30; Pipe arrangement 20b two ends are connected with compressor 40 with heat exchanger 30, and pipe arrangement 20c two ends and compressor 40 are connected with not shown steam utilization facility etc.Supply with the internal flow of water, supply with water and at first flow into pipe arrangement 20a, in heat exchanger 30 after the evaporation, get into compressor 40 and by increasing temperature and pressure through pipe arrangement 20b at second stream 20.Afterwards, by the steam after the increasing temperature and pressure from pipe arrangement 20c to conveyings such as steam utilization facilities.On pipe arrangement 20a, begin to be provided with the thermometer 23t that control is supplied with the flowmeter 22f of the flow of the flow rate regulating valve 21 of the supply water yield of water, mensuration supply water, measured the supplying temperature of supplying with water successively, on pipe arrangement 20b, be provided with the thermometer 24t that measures supply evaporation of water temperature from upstream side.Need to prove that as long as flow rate regulating valve 21 specific discharge meter 22f lean on the upstream side setting, flow rate regulating valve 21 and flowmeter 22f can be arranged on the optional position of pipe arrangement 20a or pipe arrangement 20b.
(heat exchanger)
Heat exchanger 30 and hot water with supply with hydro-thermal and be connected, the heat of hot water is made to supplying with the water transmission supplies with water and evaporate.Heat exchanger 30 is fit to use heat-exchangers of the plate type, and this heat-exchangers of the plate type has a plurality of plates, carries out heat exchange through hot water and supply water are alternately flowed between these a plurality of plates.Heat-exchangers of the plate type is compared with other heat exchanger, and device is little for heat transfer area, so steam manufacturing installation 1 becomes compact, in the little steam utilization facility in space is set, also steam manufacturing installation 1 can be set.Need to prove that heat exchanger 30 is unqualified to be heat-exchangers of the plate type, also can be box type heat-exchanger or vertical short tube type heat exchanger etc.
(compressor)
Compressor 40 is configured between the pipe arrangement 20b and pipe arrangement 20c of second stream 20, and the steam that flow in the compressor 40 is compressed.Compressor 40 is fit to use screw compressor.Need to prove that compressor 40 is unqualified to be screw compressor, also can be reciprocating compressor, scroll compressor and rotary compressor etc.
(control device)
Control device 50 is electrically connected with flowmeter 11f, 22f, thermometer 12t, 13t, 23t, 24t and flow rate regulating valve 21; According to the measured value of trying to achieve from the said determination device be stored in the necessary heat stated after various setting values the control device 50 are calculated in advance and supply with heat, and to calculate the result with this be that the basis is come flow rate regulating valve 21 is controlled.Control device 50 have the data of using in performed control program of CPU (Central Processing Unit) as arithmetic processing apparatus, storage CPU and the control program ROM (Read Only Memory), be used for the RAM (Random Access Memory) of temporary transient storage data when performing a programme.The control function of control device 50 performances realizes through making above-mentioned hardware and the software coordination in the ROM.
(about the method for operation of steam manufacturing installation)
Then, according to flow chart shown in Figure 2, the method for operation of the steam manufacturing installation in this embodiment is described.At first, make steam manufacturing installation 1 entry into service (S1).When 1 entry into service of steam manufacturing installation, drive the not shown actions such as pump that between the heat resource equipment and first stream 10, are provided with, thereby the hot water of discharging from heat resource equipment is flowed into to first stream 10.In addition, compressor 40 is rotated etc., flows into second stream 20 and supply with water.Need to prove, open state to a certain degree though flow rate regulating valve 21 is controlled so as to non-standard-sized sheet.Hot water gets into heat exchanger 30 respectively with supply water, and the heat of hot water makes to supplying with the water transmission supplies with the water evaporation.And steam is compressed machine 40 increasing temperature and pressure and from pipe arrangement 20c ejection, carries to the steam utilization facility.
Then, judge whether to begin the mensuration (S2) of necessary heat and loses heat.Under the situation of beginning calorimetry (S2 is for being), get into step S3, do not beginning (S2 is for denying) under the situation of calorimetry, standby is till begin calorimetry.
In step S3,, the temperature of the flow of the flowmeter 11f that in first stream 10 and second stream 20, is provided with, 22f and thermometer 12t, 13t, 23t, 24t is measured (S3) through the control of control device 50.
Afterwards, calculate loses heat Q1 (S4: loses heat is calculated operation).Loses heat is the heat that hot water loses because of heat exchange, can think to equate because of the heat that heat exchange obtains with supply water.Loses heat Q1 multiplies each other through the specific heat with the temperature difference of the hot water before and after the flow (mass flow) of hot water, the heat exchange, hot water and calculates.Particularly, obtain through following order.
The temperature difference (T2-T1) of the temperature T 2 after the supplying temperature T1 that (i) calculates the hot water of measuring by thermometer 12t and the heat exchange of the hot water of measuring by thermometer 13t.
(ii) measure avergae specific heat c1 by the flow F1 of flowmeter 11f instrumentation, the hot water temperature T 2 after from supplying temperature T1 to heat exchange.
(iii) temperature difference (T2-T1), flow F1, avergae specific heat c1 are all multiplied each other.
Through above order, obtain loses heat Q1.
Then, calculate necessary heat Q2 (S5: necessary heat is calculated operation).Necessary heat is for the approaching needed heat of threshold value that preestablishes the mass dryness fraction in control device 50 of the mass dryness fraction of the steam that makes compressor suction inlet side 41.The threshold value that sensible heat (wait the heat of depressing the per unit weight that because of the variations in temperature of supplying with water absorb) and the evaporation latent heat of necessary heat Q2 through will supplying with water (waiting the heat of depressing the per unit weight that the phase change because of supply water absorbs) sum multiply by the supply water yield (mass flow) of supply water and preestablishes the mass dryness fraction in control device 50 is calculated.Particularly, obtain through following order.
(i) calculate the supplying temperature T3 of the supply water of measuring by thermometer 23t and the temperature difference (T4-T3) of the supply evaporation of water temperature T of measuring by thermometer 24t 4.
(ii) obtain by flow (the supply water yield) F2 of flowmeter 22f instrumentation, the avergae specific heat c2, the evaporation latent heat Qb under the evaporating temperature T4 of supply water from supplying temperature T3 to evaporating temperature T4.
(iii) obtain sensible heat Qa through temperature difference (T4-T3) and avergae specific heat c2 are multiplied each other, and obtain sensible heat Qa with (ii) in the evaporation latent heat Qb sum obtained.
(iv) sensible heat Qa and evaporation latent heat Qb sum multiply by flow F2 and preestablish the threshold X of the mass dryness fraction in control device 50 0
Through above order, obtain necessary heat Q2.Need to prove, calculate the step (S4) of loses heat Q1 and calculate the step (S5) of necessary heat Q2 can replacing order.
At this, in the present embodiment, with the threshold X of mass dryness fraction (mass dryness fraction of compressor suction inlet side 41) 0Be set at 0.9.Work as threshold X 0In the time of in 0.7～0.95 scope, can reduce the burden of compressor, and the spray volume of the steam that can guarantee to obtain through compressor, therefore preferred, and if with threshold X 0Be set at 0.85～0.95 scope, then can further reduce the burden of compressor, thus preferred.On the contrary, when the threshold X of mass dryness fraction 0Less than 0.7 o'clock, can sneak into superfluous moisture in the steam of inflow compressor, thereby breakage may take place in compressor 40.In addition, when the threshold X of mass dryness fraction 0When bigger than 0.95, the amount of moisture that flows into the steam in the compressor 40 is few, thereby the spray volume of the steam that obtains through compressor 40 reduces.
Then, measure the difference Δ Q (S6) of necessary heat Q2 and loses heat Q1.In Δ Q＞0, be necessary heat Q2 when surpassing loses heat Q1 (S6 is for being), the control through control device 50 makes flow rate regulating valve 21 throttlings (S7), reduces the flow F2 of supply water.Under the situation of Δ Q＞0, be to supply with the actual heat that obtains of water (that is the heat that, equates) than being used to make the threshold X of the mass dryness fraction X of compressor suction inlet side 41 near mass dryness fraction with loses heat Q1 0The little state of heat (necessary heat Q2), supply with the heat that water should obtain and lack Δ Q, be to have obtained the threshold X of the mass dryness fraction X of compressor suction inlet side 41 than mass dryness fraction 0The state of the steam of little mass dryness fraction.This phenomenon for example may cause the temperature of the hot water of discharging from thermal source or the situation that flow descends etc.Therefore, for the mass dryness fraction X that makes compressor suction inlet side 41 threshold X near mass dryness fraction 0, need make necessary heat Q2 reduce Δ Q, thereby make flow rate regulating valve 21 throttlings, reduce the flow F2 that supplies with water.The amount of the flow F2 that reduces in the step once can be considered the difference Δ Q of necessary heat Q2 and loses heat Q1 etc. and suitably select.
In Δ Q=0 or Δ Q＜0, be that necessary heat Q2 equates with loses heat Q1 or when being lower than loses heat Q1 (S6 for not), gets into step S8.
In step S8, in Δ Q＜0, be necessary heat Q2 when being lower than loses heat Q1 (S8 is for being), at this moment come the aperture (S9) of augmented flow adjustment valve 21 through the control of control device 50, the supply flow rate F2 that supplies with water is increased.Under the situation of Δ Q＜0, be to supply with the actual heat that obtains of water (that is the heat that, equates) than being used to make the threshold X of the mass dryness fraction X of compressor suction inlet side 41 near mass dryness fraction with loses heat Q1 0The big state of heat (necessary heat Q2), supply with the superfluous Δ Q of heat that water should obtain, be to have obtained the threshold X of the mass dryness fraction X of compressor suction inlet side 41 than mass dryness fraction 0The state of the steam of big mass dryness fraction.This phenomenon for example may cause the situation that situation that the temperature of the hot water of discharging from thermal source rises or flow increase etc.Therefore, for the mass dryness fraction X that makes compressor suction inlet side 41 threshold X near mass dryness fraction 0, need make necessary heat Q2 increase Δ Q, thereby the aperture of augmented flow adjustment valve 21, the flow F2 that supplies with water is increased.
At Δ Q=0, be necessary heat Q2 when equating (S8 for not) with loses heat Q1, the mass dryness fraction X of expression compressor suction inlet side 41 and the threshold X of mass dryness fraction 0Therefore be roughly the state of identical size, flow rate regulating valve 21 do not controlled and got into next step (S10).
Then, judge whether calorimetry finishes (S10).(S10 is for denying) returned S3 when proceeding calorimetry, repeats the step of S3～S9.When calorimetry finishes (S10 is for being), the running of steam manufacturing installation 1 is stopped etc., finish the manufacturing (S11) of steam.
(effect)
Then, the effect that obtains through this embodiment is described.The steam manufacturing installation 1 of this embodiment has the adjustment that is provided with at second stream 20 and supplies with the flow rate regulating valve 21 of the flow of water, the control device 50 of control flow rate regulating valve 21, to become the threshold X of mass dryness fraction for the mass dryness fraction X that makes the steam in the inflow compressor 40 0Institute's calorific requirement (necessary heat Q2) compares with the heat (loses heat Q1) that hot water loses because of heat exchange; When necessary heat Q2 surpasses loses heat Q1; Make flow rate regulating valve 21 throttlings and reduce the supply water yield of supplying with water; When necessary heat Q2 is lower than loses heat Q1, the aperture of augmented flow adjustment valve 21 and the supply water yield of the water of increasing supply.
Through this structure; Even make at the used heat that utilizes flow and temperature to change all the time under the situation of steam; That is, even under the situation that loses heat Q1 changes all the time, through necessary heat Q2 and loses heat Q1 are compared; Control the flow of supplying with water, therefore also can make the threshold X of actual mass dryness fraction X near mass dryness fraction 0Thereby, can the mass dryness fraction of compressor suction inlet side 41 be remained desirable state.
So; Owing to can the mass dryness fraction of compressor suction inlet side 41 be kept constant; Therefore can prevent to flow into and sneak into superfluous moisture in the steam of compressor 40 and compressor 40 takes place damagedly, the moisture that perhaps flows into the steam in the compressor 40 tails off and situation that the spray volume of the steam that obtains reduces.In addition, owing to do not need and to guide through the steam heat exchanger 30 that compressor 40 obtains, therefore can all use facility to supply with the steam that obtains through compressor 40 to steam.
In addition; Because first stream 10 and second stream 20 at steam manufacturing installation 1 are provided with flowmeter 11f, 22f and thermometer 12t, 13t, 23t, 24t, therefore can come to calculate simply necessary heat Q2 and loses heat Q1 according to the measured value that obtains by the said determination device.
(variation)
Then, utilize Fig. 3, variation of the present invention is described.Fig. 3 representes the sketch of variation.This variation is to remove thermometer 23t, 24t from first embodiment, replace in this, and supplying temperature T3 ' and the evaporating temperature T4 ' that will supply with water preestablishes in control device 50 variation as setting value.
(method of operation of the steam manufacturing installation that relates to about variation)
The method of operation of the steam manufacturing installation that then, variation is related to describes.At this, only to first embodiment in the different place of method of operation of steam manufacturing installation describe, to first embodiment in the same place of method of operation of steam manufacturing installation omit explanation.
In the temperature measuring in the step S3 of flow chart shown in Figure 2,, therefore only measure temperature through thermometer 12t, the 13t that is arranged on first stream 10 owing in variation, remove thermometer 23t, 24t from first embodiment.
In addition, in step S5, in variation, calculate necessary heat Q2 through following order.
The supplying temperature T3 ' that (i) calculates the supply water that preestablishes in control device 50 and the temperature difference that preestablishes the supply evaporation of water temperature T 4 ' in identical control device 50 (T4 '-T3 ').
(ii) obtain the flow F2 that measures by flow measurement device 22f, the avergae specific heat c2 ' of supply water, the evaporation latent heat Qb ' under the evaporating temperature T4 ' from supplying temperature T3 ' to evaporating temperature T4 '.
(iii) obtain sensible heat Qa ' through temperature difference (T4 '-T3 ') and avergae specific heat c2 ' are multiplied each other, and obtain sensible heat Qa ' with (ii) in the evaporation latent heat Qb ' sum obtained.
(iv) sensible heat Qa ' and evaporation latent heat Qb ' sum multiply by flow F2 and preestablish the threshold X of the mass dryness fraction in control device 50 0
Obtain necessary heat Q2 through above order.
At this, the setting value T3 ' that preferably supplies with the supplying temperature of water is set near actual supplying temperature.But, when finding the solution sensible heat Qa ', need supply with the supplying temperature T3 ' of water, and sensible heat Qa ' is about 1/10th the size of evaporation latent heat Qb ', so the influence that sensible heat Qa ' produces is little.Therefore, even the error of the supplying temperature of supplying temperature T3 ' and reality is also no problem about 20 ℃.
In addition, preferably supply with evaporation of water temperature T 4 ' and also be temperature near actual steam temperature.But even the error of the evaporating temperature of evaporating temperature T4 ' and reality for example is 20 ℃, the error in the calculating of the mass dryness fraction X under this situation also is merely about 0.02, can not exert an influence to compressor 40.Therefore, even the error of the evaporating temperature of evaporating temperature T4 ' and reality is also no problem about 20 ℃.
(effect)
The effect that this variation is produced describes.In this variation, make the supplying temperature T3 ' and the evaporating temperature T4 ' that supply with water preestablish the setting value in control device 50.Through this structure, need not measure supplying temperature and the evaporating temperature of supplying with water through temperature measuring device, the steam manufacturing installation is simplified.
More than, embodiment of the present invention is illustrated.But the present invention is unqualified is above-mentioned embodiment, in the scope that claims are put down in writing, can implement various changes.

Claims (4)

1. steam manufacturing installation, it possesses: first stream that the heat exchange medium of discharging from thermal source flows; Supply with second stream of water flows; The heat of said heat exchange medium is made the heat exchanger of said supply water evaporation to the transmission of said supply water; Steam in said heat exchanger, generating carries out compressor for compressing, and said steam manufacturing installation is characterised in that,
Flow rate regulating valve and the control device of controlling said flow rate regulating valve with supply water yield of the said supply water of adjustment,
Said control device is obtained necessary heat with the threshold value that the sensible heat from the supplying temperature to the evaporating temperature and the evaporation latent heat sum under the said evaporating temperature of said supply water multiply by the said supply water yield and predefined mass dryness fraction,
Said control device compares because of the loses heat that heat exchange loses said necessary heat and said heat exchange medium; When said necessary heat surpasses said loses heat; Make said flow rate regulating valve throttling and reduce the supply water yield of said supply water; When said necessary heat is lower than said loses heat, increases the aperture of said flow rate regulating valve and increase the supply water yield of said supply water.
2. steam manufacturing installation according to claim 1 is characterized in that,
Through the said heat exchanger upstream side of said second stream, and said heat exchanger and said compressor between thermometer is set, try to achieve the supplying temperature and the evaporating temperature of said supply water.
3. steam manufacturing installation according to claim 1 is characterized in that,
The supplying temperature of said supply water and evaporating temperature are the setting values that preestablishes in said control device.
4. the method for operation of a steam manufacturing installation, said steam manufacturing installation possesses: first stream that the heat exchange medium of discharging from thermal source flows; Supply with second stream of water flows; The heat of said heat exchange medium is made the heat exchanger of said supply water evaporation to the transmission of said supply water; Steam in said heat exchanger, generating carries out compressor for compressing, and the method for operation of said steam manufacturing installation is characterised in that, comprising:
The supply water yield that the sensible heat from the supplying temperature to the evaporating temperature and the evaporation latent heat sum under the said evaporating temperature of said supply water multiply by said supply water and the threshold value of predefined mass dryness fraction are obtained the necessary heat of necessary heat and are calculated operation;
Obtain the loses heat of the heat that said heat exchange medium loses because of heat exchange and calculate operation;
Compare calculating the necessary heat of calculating in the operation at said necessary heat and calculating the loses heat of calculating in the operation in said loses heat; When said necessary heat surpasses said loses heat; Make the said supply water of adjustment the supply water yield the flow rate regulating valve throttling and reduce the supply water yield of said supply water; When said necessary heat is lower than said loses heat, increases the aperture of said flow rate regulating valve and increase the flow-control operation of the supply water yield of said supply water.
CN201210055101XA 2011-05-25 2012-03-05 Steam manufacturing device and operation method thereof Pending CN102798113A (en)

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Application Number Priority Date Filing Date Title
JP2011116594A JP5666381B2 (en) 2011-05-25 2011-05-25 Steam production apparatus and operation method thereof
JP2011-116594 2011-05-25

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