CN103060990A - Constant-humidity relaxation heat setting machine for condensate water flashing and sensible heat and exhaust afterheat recovering - Google Patents
Constant-humidity relaxation heat setting machine for condensate water flashing and sensible heat and exhaust afterheat recovering Download PDFInfo
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- CN103060990A CN103060990A CN2013100349484A CN201310034948A CN103060990A CN 103060990 A CN103060990 A CN 103060990A CN 2013100349484 A CN2013100349484 A CN 2013100349484A CN 201310034948 A CN201310034948 A CN 201310034948A CN 103060990 A CN103060990 A CN 103060990A
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Abstract
The invention relates to a constant-humidity relaxation heat setting machine for condensate water flashing and sensible heat and exhaust afterheat recovering. An inlet of a high-pressure heat exchanger is connected with a steam supply main pipe; an outlet of the high-pressure heat exchanger is connected into a medium-pressure flashing tank through a high-pressure trap; a medium-pressure constant-pressure overflow valve is arranged at the top part of the medium-pressure flashing tank; an outlet of the medium-pressure constant-pressure overflow valve is connected into an inlet of the medium-pressure constant-pressure overflow valve through a medium-pressure flashing steam pipe; an outlet of a medium-pressure heat exchanger is connected to a low-pressure flashing tank through the medium-pressure trap; a low-pressure constant-pressure overflow valve is arranged at the top part of the low-pressure flashing tank; an outlet of the low-pressure constant-pressure overflow valve is connected into a low-pressure heat exchanger through a low-pressure flashing steam pipe; the outlet of the low-pressure heat exchanger is connected into a condensate pump through a low-voltage trap; an outlet of the condensate pump is connected into a fresh air preheater; a pre-heating air outlet of the fresh air preheater is connected into an air supply inlet of the relaxation heat setting machine, and the relaxation heat setting machine is connected into the fresh air preheater to indirectly exchange heat with the fresh air. The setting machine can achieve air exhaust and full utilization of condensate afterheat, and is high in thermal efficiency.
Description
Technical field
The present invention relates to a kind of loosening heat setting machine, particularly a kind of constant humidity, condensed water flash and sensible heat and air exhaust waste heat reclaim loosening heat setting machine.
Background technology
Loosening heat setting machine is often used in the post processing of polyester staple fiber, the cabinets cavity of loosening heat setting machine is provided with blower fan, heat exchanger and product is carried out the drying chamber of shaping and drying, the inlet scoop of blower fan communicates with wind-supplying mouth on the casing, the air outlet of blower fan is aimed at the heat exchanger of top, the air outlet of heat exchanger top enters drying chamber, the drying chamber below is provided with return air inlet and exhaust outlet, exhaust outlet leads to outside the casing by exhaust duct, hand control valve is installed on the exhaust duct, and return air inlet also communicates with the inlet scoop of blower fan.Entering new wind in the casing from wind-supplying mouth mixes by blower fan with return air and blows to heat exchanger, heat exchanger is heated becomes hot blast, hot blast enters drying chamber and product is finalized the design and dries, and then a part of wind enters exhaust outlet by air draft, and a part of wind is by the return air inlet reuse.High-pressure steam pipe, middle pressure steam pipe and low pressure steam pipe link to each other with main feed header by stop valve respectively, and main feed header links to each other with the entrance of heat exchanger, and the outlet conduit of heat exchanger is provided with drain valve.
The weak point of this loosening heat setting machine is: (1) is different according to product, with steam pressure Three Estate is arranged, a drain valve but only is installed, drain valve can only work under some pressure, when non-design pressure state, can not keep the required pressure reduction of normal operation, or discharge capacity is inadequate, or steam leakage is serious.(2) waste heat of condensed water that drain valve is arranged needs external user to be used, and when without suitable user, is drained inevitably waste.(3) pollutant that carries of return air very easily in the heat exchanger deposition, worsens heat exchange efficiency.(4) even condensation water residual heat is flashed utilization, the condensate temperature of discharging still has 130 ℃～150 ℃, and the waste heat loss amount is large.(5) the high temperature air exhaust waste heat does not utilize, and exhaust air rate is manually controlled, and discharge capacity randomness is large.
Summary of the invention
The object of the invention is to, overcome problems of the prior art, provide a kind of constant humidity, condensed water flash and sensible heat and air exhaust waste heat to reclaim loosening heat setting machine, no matter product uses high pressure, middle pressure or low-pressure steam, loosening heat setting machine self all can realize waste heat step, take full advantage of.
For solving above technical problem, a kind of constant humidity of the present invention, condensed water flash and sensible heat and air exhaust waste heat reclaim loosening heat setting machine, the cabinets cavity of loosening heat setting machine is provided with blower fan, heat exchanger reaches the drying chamber that product is carried out shaping and drying, the inlet scoop of described blower fan communicates with wind-supplying mouth on the casing, the air outlet of blower fan is aimed at the heat exchanger of top, the air outlet of described heat exchanger top enters described drying chamber, the drying chamber below is provided with return air inlet and exhaust outlet, described exhaust outlet leads to outside the casing by exhaust duct, described return air inlet also communicates with the inlet scoop of blower fan, also comprise the fresh air preheating device, the below of described fresh air preheating device is provided with new wind entrance, the top of fresh air preheating device is provided with pre-hot blast outlet, and the Lower Half of the exhaust duct access fresh air preheating device of loosening heat setting machine makes air draft and new wind carry out indirect heat exchange; Described heat exchanger comprises from top to bottom stacked successively high pressure heat exchanger, middle pressure heat exchanger and low pressure heat exchanger, the entrance of described high pressure heat exchanger links to each other with main feed header, the outlet of described high pressure heat exchanger is by pressing the condensing water inlet of flash tank in the high pressure drain valve access, the top of middle pressure flash tank is provided with middle compression set pressurized overflow valve, the outlet of middle compression set pressurized overflow valve accesses the entrance of described middle pressure heat exchanger by middle pressure flash distillation steam pipe, the outlet of middle pressure heat exchanger is by the condensing water inlet of middle pressure drain valve access low pressure flash chamber, the top of low pressure flash chamber is provided with low pressure level pressure overflow valve, the outlet of low pressure level pressure overflow valve accesses the entrance of described low pressure heat exchanger by the low pressure flash steam pipe, the low pressure heat exchanger exit is by the entrance of low pressure drain valve access condensate pump, the first half that the condensed water delivery side of pump accesses described fresh air preheating device makes condensed water and new wind carry out indirect heat exchange, the described wind-supplying mouth of the pre-hot blast outlet access loosening heat setting machine of described fresh air preheating device.
With respect to prior art, the present invention has obtained following beneficial effect: the Lower Half of the air draft access fresh air preheating device of (1) loosening heat setting machine is carried out preliminary preheating to new wind, waste heat in the air draft is recovered, and has reduced thermal pollution and the heat loss of discharging, and new air temperature is able to preliminary raising; (2) still there is the larger temperature difference in the low pressure condensed water of low pressure flash chamber and low pressure heat exchanger discharging with the preliminary new wind of preheating, sent into the first half of fresh air preheating device by condensate pump, the new wind of preliminary preheating is carried out again preheating, sensible heat in the low pressure condensed water is recovered, send in the loosening heat setting machine after new air temperature is improved again, reduced the steam consumption of heat exchanger in the loosening heat setting machine; (3) traditional single heat exchanger is divided into from top to bottom stacked successively high pressure heat exchanger, middle pressure heat exchanger and low pressure heat exchanger; When Product Process needs high steam, only need to high pressure heat exchanger steam supply wherein, high steam becomes the high pressure condensed water discharge latent heat in high pressure heat exchanger after, the high pressure condensed water is dredged out by high pressure drain valve and is entered the flash distillation of middle pressure flash tank and become middle pressure flash steam, middle pressure flash steam enters by middle pressure flash distillation steam pipe becomes middle pressure condensed water after middle pressure heat exchanger continues to discharge latent heat, middle pressure condensed water is dredged out by middle pressure drain valve and is entered the low pressure flash chamber flash distillation and become low pressure flash vapour, low pressure flash vapour enters by the low pressure flash steam pipe becomes the low pressure condensed water after the low pressure heat exchanger discharges latent heat again, the low pressure condensed water is sent into the fresh air preheating device by condensate pump and is continued to discharge sensible heat, the condensate temperature of the final discharging of loosening heat setting machine is very low, and waste heat is fully reclaimed; (4) when Product Process need to use middle pressure steam, high pressure heat exchanger and middle pressure heat exchanger all use the middle pressure steam of outer confession, press drain valve to enter low pressure flash chamber in the condensed water warp that high pressure heat exchanger and middle pressure heat exchanger produce, the low pressure flash vapour that low pressure flash chamber produces enters the low pressure heat exchanger.(5) when Product Process need to use low-pressure steam, high pressure heat exchanger, middle pressure heat exchanger and low pressure heat exchanger all use the low-pressure steam of outer confession, and the condensed water that high pressure heat exchanger, middle pressure heat exchanger and low pressure heat exchanger produce all enters condensate pump through the low pressure drain valve.(6) when Product Process needs high steam, middle pressure heat exchanger and low pressure heat exchanger need not to use outer steam supply, the middle pressure that middle pressure flash tank and low pressure flash chamber produce and low pressure flash vapour need not to rely on external user to use, loosening heat setting machine self has namely been realized the cascade utilization of flash distillation waste heat, has avoided the emptying waste of middle pressure and low pressure flash vapour.In like manner, when Product Process needed middle pressure steam, the low pressure heat exchanger need not to use outer steam supply, and the low pressure flash vapour that low pressure flash chamber produces is for the low pressure heat exchanger of loosening heat setting machine self.When (7) using high steam, new wind is first through the lower air draft preheating of excess temperature, again by the slightly high low pressure condensation water preheat of temperature, then by the higher low pressure heat exchanger heating of temperature, then by the higher middle pressure heat exchanger heating of temperature, at last by the highest high pressure heat exchanger heating of temperature; When using middle pressure steam, new wind is first through the lower air draft preheating of excess temperature, again by the slightly high low pressure condensation water preheat of temperature, then by the higher low pressure heat exchanger heating of temperature, then by temperature higher middle pressure heat exchanger and high pressure heat exchanger heating; When using low-pressure steam, new wind is first through the lower air draft preheating of excess temperature, again by the slightly high low pressure condensation water preheat of temperature, then by the higher low pressure heat exchanger of temperature, middle pressure heat exchanger and high pressure heat exchanger heating; In this process, the temperature of new wind improves step by step, also is to increase gradually to the temperature of the medium of its heating, and the mode of this countercurrent flow has totally kept very high heat exchange efficiency.
As preferred version of the present invention, high-pressure steam pipe, middle pressure steam pipe and low pressure steam pipe link to each other with main feed header by the first stop valve, the second stop valve and the 3rd stop valve respectively; Described main feed header directly links to each other with the entrance of described high pressure heat exchanger, links to each other with the entrance of described middle pressure heat exchanger, links to each other with the entrance of described low pressure heat exchanger by the 5th stop valve by the 4th stop valve; Described middle pressure flash distillation steam pipe is provided with the 6th stop valve, and the outlet of described the 6th stop valve also links to each other with the entrance of described middle pressure heat exchanger; Described low pressure flash steam pipe is provided with the 7th stop valve, and the outlet of described the 7th stop valve also links to each other with the entrance of described low pressure heat exchanger; The outlet of described high pressure heat exchanger is provided with the 8th stop valve, and the rear of described the 8th stop valve is in series with described high pressure drain valve; The outlet of described middle pressure heat exchanger is provided with the tenth stop valve, and the rear of described the tenth stop valve is in series with described middle pressure drain valve; Cross-over connection has the 9th stop valve between the entrance of described the 8th stop valve and described the tenth stop valve, and cross-over connection has the 11 stop valve between the entrance of described the tenth stop valve and described low pressure drain valve.(1) when Product Process need to use high steam, open the first stop valve, the 6th stop valve, the 7th stop valve, the 8th stop valve and the tenth stop valve, close simultaneously the second stop valve, the 3rd stop valve, the 4th stop valve, the 5th stop valve, the 9th stop valve and the 11 stop valve; What this moment, high pressure heat exchanger used is the high steam of outer confession, the condensed water of high pressure heat exchanger enters middle pressure flash tank through the 8th stop valve and high pressure drain valve, the middle pressure flash steam that middle pressure flash tank produces enters middle pressure heat exchanger, the condensed water of middle pressure heat exchanger enters low pressure flash chamber through the tenth stop valve and middle pressure drain valve, and the low pressure flash vapour that low pressure flash chamber produces enters the low pressure heat exchanger.(2) when Product Process need to use middle pressure steam, open the second stop valve, the 4th stop valve, the 7th stop valve, the 9th stop valve and the tenth stop valve, close simultaneously the first stop valve, the 3rd stop valve, the 5th stop valve, the 6th stop valve, the 8th stop valve and the 11 stop valve, this moment, high pressure heat exchanger and middle pressure heat exchanger all used the middle pressure steam of outer confession, the condensed water that high pressure heat exchanger produces is through the 9th stop valve, the tenth stop valve and middle pressure drain valve enter low pressure flash chamber, the condensed water that middle pressure heat exchanger produces enters low pressure flash chamber through the tenth stop valve and middle pressure drain valve, and the low pressure flash vapour that low pressure flash chamber produces enters the low pressure heat exchanger.(3) when Product Process need to use low-pressure steam, open the 3rd stop valve, the 4th stop valve, the 5th stop valve, the 9th stop valve and the 11 stop valve, close simultaneously the first stop valve, the second stop valve, the 6th stop valve, the 7th stop valve, the 8th stop valve and the tenth stop valve, this moment high pressure heat exchanger, middle pressure heat exchanger and low pressure heat exchanger all use the low-pressure steam of outer confession, the condensed water that high pressure heat exchanger produces is through the 9th stop valve, the 11 stop valve and low pressure drain valve enter condensate pump, the condensed water that middle pressure heat exchanger produces enters condensate pump through the 11 stop valve and low pressure drain valve, and the condensed water that the low pressure heat exchanger produces directly enters condensate pump through the low pressure drain valve.By the switching of valve, no matter Product Process needs high pressure, middle pressure or low-pressure steam, and heat exchanger is gross area use, drain valve all in design conditions work, and loosening heat setting machine self just can be realized the cascade utilization of condensation water residual heat.
As preferred version of the present invention, the air draft control valve that is controlled by the PLC controller is installed on the exhaust duct of described loosening heat setting machine, described drying chamber is equipped with humidity sensor, the holding wire of described humidity sensor accesses described PLC controller, the aperture that the moisture signal that described PLC controller provides according to described humidity sensor is regulated the air draft control valve.The moisture of product constantly is evaporated in the drying chamber, drying chamber relative humidity constantly raises, too high humidity will hinder the continuation evaporation of moisture on the product, must humid air be discharged outside the casing by means of air draft, the aperture of air draft control valve is too large then too much with the heat of air draft loss, the aperture of air draft control valve is too little, then the humidity in the drying chamber does not reach requirement, the humidity of the drying chamber that is provided by humidity sensor by the PLC controller is adjusted the aperture of air draft control valve, can realize accurate control, both guarantee product quality, reduced again the air exhaust heat loss.
As preferred version of the present invention, the condensation-water drain of described middle pressure flash tank bottom is equipped with presses the pressure of flash tank automatically to regulate the front pressure automatic regulating valve of aperture in the basis, and the outlet of described front pressure automatic regulating valve accesses the entrance of described low pressure flash chamber.Press the pressure height of flash tank automatically to regulate aperture in the front pressure automatic regulating valve basis, flow between middle pressure flash tank and the low pressure flash chamber can be regulated by front pressure control valve, when the pressure of middle pressure flash tank is higher than setting value, front pressure control valve opening increases, and the flow between middle pressure flash tank and the low pressure flash chamber increases; When the pressure of middle pressure flash tank was lower than setting value, front pressure control valve opening reduced, and the flow between middle pressure flash tank and the low pressure flash chamber reduces.
As preferred version of the present invention, the condensation-water drain of described low pressure flash chamber bottom accesses the entrance of described condensate pump.
As preferred version of the present invention, the front and back of described high pressure drain valve, middle pressure drain valve and low pressure drain valve are in series with respectively front stop valve and rear stop valve, are parallel with the bypass stop valve between the entrance of described front stop valve and the outlet of rear stop valve.Front stop valve and rear stop valve normally are in opening, when drain valve occur to damage need is changed, close front stop valve and rear stop valve, open the bypass stop valve, can change drain valve in the situation of breaks in production not.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments, and accompanying drawing only provides reference and explanation usefulness, and is non-in order to limit the present invention.
Fig. 1 is the schematic diagram that constant humidity of the present invention, condensed water flash and sensible heat and air exhaust waste heat reclaim loosening heat setting machine.
Among the figure: the S1. high-pressure steam pipe; S2. middle pressure steam pipe; S3. low pressure steam pipe; S4. main feed header; S5. press the flash distillation steam pipe in; S6. low pressure flash steam pipe; E1. high pressure heat exchanger; E2. press heat exchanger in; E3. low pressure heat exchanger; E4. fresh air preheating device; W1. high pressure draining pipe; W2. press drain pipe in; W3. low pressure drain pipe; W4. cryogenic condensation water pipe; V1. the first stop valve; V2. the second stop valve; V3. the 3rd stop valve; V4. the 4th stop valve; V5. the 5th stop valve; V6. the 6th stop valve; V7. the 7th stop valve; V8. the 8th stop valve; V9. the 9th stop valve; V10. the tenth stop valve; V11. the 11 stop valve; Vk. air draft control valve; Vq. press automatic regulating valve before; Vd1. middle compression set pressurized overflow valve; Vd2. low pressure level pressure overflow valve; Vt1. high pressure drain valve; Vt2. press drain valve in; Vt3. low pressure drain valve; D1. press flash tank in; D2. low pressure flash chamber; P1. condensate pump; F1. new wind; F2. pre-hot blast; F3. mix wind; F4. hot blast; F5. return air; F6. air draft; Fy. blower fan; H1. humidity sensor.
The specific embodiment
As shown in Figure 1, constant humidity of the present invention, condensed water flash and sensible heat and air exhaust waste heat reclaim loosening heat setting machine, the cabinets cavity of loosening heat setting machine is provided with blower fan Fy, drying chamber and heat exchanger, casing is provided with fresh air preheating device E4 outward, the inlet scoop of blower fan Fy communicates with wind-supplying mouth on the casing, the air outlet of blower fan Fy is aimed at the heat exchanger of top, the air outlet of heat exchanger top enters drying chamber, the drying chamber below is provided with return air inlet and exhaust outlet, exhaust outlet leads to outside the casing by exhaust duct, and return air inlet also communicates with the inlet scoop of blower fan Fy.
The air draft control valve Vk that is controlled by the PLC controller is installed on the exhaust duct of loosening heat setting machine, drying chamber is equipped with humidity sensor H1, the holding wire access PLC controller of humidity sensor H1, the aperture that the moisture signal that the PLC controller provides according to humidity sensor H1 is regulated air draft control valve Vk.The Lower Half of exhaust duct access fresh air preheating device E4 makes air draft F6 and new wind F1 carry out discharging behind the indirect heat exchange.The first half of the outlet access fresh air preheating device E4 of condensate pump P1 makes condensed water and new wind carry out further indirect heat exchange, the below of fresh air preheating device E4 is provided with new wind entrance, the top of fresh air preheating device E4 is provided with pre-hot blast outlet, the wind-supplying mouth of pre-hot blast outlet access loosening heat setting machine.The low pressure condensation water flow passage of the air draft runner of Lower Half and the first half is not connected among the fresh air preheating device E4, and the new distinguished and admirable road of the new distinguished and admirable road of Lower Half and the first half connects among the fresh air preheating device E4.
The Lower Half of the air draft F6 access fresh air preheating device E4 of loosening heat setting machine is carried out preliminary preheating to new wind F1, and the waste heat among the air draft F6 is recovered, and new wind F1 temperature is able to preliminary raising; The low pressure condensed water of then sending here from condensate pump P1 carries out again preheating to new wind becomes preheating wind F2, discharge by cryogenic condensation water pipe W4 after sensible heat in the low pressure condensed water is recovered, send into the wind-supplying mouth of loosening heat setting machine after new air temperature is improved again.The pre-hot blast F2 that enters from wind-supplying mouth and the return air F5 of drying chamber enter the inlet scoop of blower fan Fy jointly, the wind that blower fan Fy blows out becomes hot blast F4 and enters drying chamber after the heat exchanger heating, humid air part in the drying chamber is discharged by exhaust duct as air draft, and another part participates in circulation as return air F5.
Heat exchanger comprises from top to bottom stacked successively high pressure heat exchanger E1, middle pressure heat exchanger E2 and low pressure heat exchanger E3.Mix wind F3 and blown out by blower fan Fy, when Product Process need to use high steam, mix wind F3 first through the higher low pressure heat exchanger E3 heating of excess temperature, then by the higher middle pressure heat exchanger E2 heating of temperature, at last by the highest high pressure heat exchanger E1 heating of temperature; When Product Process need to use middle pressure steam, mix wind F3 first through the higher low pressure heat exchanger E3 heating of excess temperature, then by temperature higher middle pressure heat exchanger E2 and high pressure heat exchanger E1 heating.In this process, the temperature of air improves step by step, also is to increase gradually to the vapor (steam) temperature of its heating.
High-pressure steam pipe S1, middle pressure steam pipe S2 link to each other with main feed header S4 with the 3rd stop valve V3 by the first stop valve V1, the second stop valve V2 respectively with low pressure steam pipe S3.Main feed header S4 directly links to each other with the entrance of high pressure heat exchanger E1, links to each other with the entrance of middle pressure heat exchanger E2, links to each other with the entrance of low pressure heat exchanger E3 by the 5th stop valve V5 by the 4th stop valve V4.
Be in series with successively the 8th stop valve V8 and high pressure drain valve Vt1 on the high pressure draining pipe W1 of high pressure heat exchanger E1 outlet, press the condensing water inlet of flash tank D1 in the outlet access of high pressure drain valve Vt1, the top of middle pressure flash tank D1 is provided with middle compression set pressurized overflow valve Vd1, the outlet of middle compression set pressurized overflow valve Vd1 is by pressing the entrance of heat exchanger E2 in the middle pressure flash distillation steam pipe S5 access, middle pressure flash distillation steam pipe S5 is provided with the 6th stop valve V6.
Be in series with successively the tenth stop valve V10 and middle pressure drain valve Vt2 on the middle pressure drain pipe W2 of middle pressure heat exchanger E2 outlet, the condensing water inlet of the outlet access low pressure flash chamber D2 of middle pressure drain valve Vt2, the top of low pressure flash chamber D2 is provided with low pressure level pressure overflow valve Vd2, the outlet of low pressure level pressure overflow valve Vd2 is by the entrance of low pressure flash steam pipe S6 access low pressure heat exchanger E3, and low pressure flash steam pipe S6 is provided with the 7th stop valve V7.
The low pressure drain pipe W3 of low pressure heat exchanger E3 outlet is provided with low pressure drain valve Vt3, the entrance of the outlet access condensate pump P1 of low pressure drain valve Vt3.Cross-over connection has the 9th stop valve V9 between the entrance of the 8th stop valve V8 and the tenth stop valve V10, and cross-over connection has the 11 stop valve V11 between the entrance of the tenth stop valve V10 and low pressure drain valve Vt3.
The condensation-water drain of middle pressure flash tank D1 bottom is equipped with presses the pressure of flash tank D1 automatically to regulate the front pressure automatic regulating valve Vq of aperture in the basis, the entrance of the outlet access low pressure flash chamber D2 of front pressure automatic regulating valve Vq.Press the pressure height of flash tank D1 automatically to regulate aperture in the front pressure automatic regulating valve Vq basis, flow between middle pressure flash tank D1 and the low pressure flash chamber D2 can be regulated by front pressure control valve, when the pressure of middle pressure flash tank D1 is higher than setting value, front pressure control valve opening increases, and the flow between middle pressure flash tank D1 and the low pressure flash chamber D2 increases; When the pressure of middle pressure flash tank D1 was lower than setting value, front pressure control valve opening reduced, and the flow between middle pressure flash tank D1 and the low pressure flash chamber D2 reduces.The entrance of the condensation-water drain access condensate pump P1 of low pressure flash chamber D2 bottom.
The front and back of high pressure drain valve Vt1, middle pressure drain valve Vt2 and low pressure drain valve Vt3 are in series with respectively front stop valve and rear stop valve, are parallel with the bypass stop valve between the entrance of front stop valve and the outlet of rear stop valve.
When Product Process need to use high steam, open the first stop valve V1, the 6th stop valve V6, the 7th stop valve V7, the 8th stop valve V8 and the tenth stop valve V10, close simultaneously the second stop valve V2, the 3rd stop valve V3, the 4th stop valve V4, the 5th stop valve V5, the 9th stop valve V9 and the 11 stop valve V11; What this moment, high pressure heat exchanger E1 used is the high steam of outer confession, the condensed water of high pressure heat exchanger E1 enters middle pressure flash tank D1 through the 8th stop valve V8 and high pressure drain valve Vt1, the middle pressure flash steam that middle pressure flash tank D1 produces enters middle pressure heat exchanger E2, the condensed water of middle pressure heat exchanger E2 enters low pressure flash chamber D2 through the tenth stop valve V10 and middle pressure drain valve Vt2, and the low pressure flash vapour that low pressure flash chamber D2 produces enters low pressure heat exchanger E3.
When Product Process need to use middle pressure steam, open the second stop valve V2, the 4th stop valve V4, the 7th stop valve V7, the 9th stop valve V9 and the tenth stop valve V10, close simultaneously the first stop valve V1, the 3rd stop valve V3, the 5th stop valve V5, the 6th stop valve V6, the 8th stop valve V8 and the 11 stop valve V11, this moment, high pressure heat exchanger E1 and middle pressure heat exchanger E2 all used the middle pressure steam of outer confession, the condensed water that high pressure heat exchanger E1 produces is through the 9th stop valve V9, the tenth stop valve V10 and middle pressure drain valve Vt2 enter low pressure flash chamber D2, the condensed water that middle pressure heat exchanger E2 produces enters low pressure flash chamber D2 through the tenth stop valve V10 and middle pressure drain valve Vt2, and the low pressure flash vapour that low pressure flash chamber D2 produces enters low pressure heat exchanger E3.
When Product Process need to use low-pressure steam, open the 3rd stop valve V3, the 4th stop valve V4, the 5th stop valve V5, the 9th stop valve V9 and the 11 stop valve V11, close simultaneously the first stop valve V1, the second stop valve V2, the 6th stop valve V6, the 7th stop valve V7, the 8th stop valve V8 and the tenth stop valve V10, this moment high pressure heat exchanger E1, middle pressure heat exchanger E2 and low pressure heat exchanger E3 all use the low-pressure steam of outer confession, the condensed water that high pressure heat exchanger E1 produces is through the 9th stop valve V9, the 11 stop valve V11 and low pressure drain valve Vt3 enter condensate pump P1, the condensed water that middle pressure heat exchanger E2 produces enters condensate pump P1 through the 11 stop valve V11 and low pressure drain valve Vt3, and the condensed water that low pressure heat exchanger E3 produces directly enters condensate pump P1 through low pressure drain valve Vt3.
The above only is the present invention's better possible embodiments, and is non-so limit to scope of patent protection of the present invention.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 in the protection domain of requirement of the present invention.
Claims (6)
1. constant humidity, condensed water flash and sensible heat and air exhaust waste heat reclaim loosening heat setting machine, the cabinets cavity of loosening heat setting machine is provided with blower fan, heat exchanger reaches the drying chamber that product is carried out shaping and drying, the inlet scoop of described blower fan communicates with wind-supplying mouth on the casing, the air outlet of blower fan is aimed at the heat exchanger of top, the air outlet of described heat exchanger top enters described drying chamber, the drying chamber below is provided with return air inlet and exhaust outlet, described exhaust outlet leads to outside the casing by exhaust duct, described return air inlet also communicates with the inlet scoop of blower fan, it is characterized in that: also comprise the fresh air preheating device, the below of described fresh air preheating device is provided with new wind entrance, the top of fresh air preheating device is provided with pre-hot blast outlet, and the Lower Half of the exhaust duct access fresh air preheating device of loosening heat setting machine makes air draft and new wind carry out indirect heat exchange; Described heat exchanger comprises from top to bottom stacked successively high pressure heat exchanger, middle pressure heat exchanger and low pressure heat exchanger, the entrance of described high pressure heat exchanger links to each other with main feed header, the outlet of described high pressure heat exchanger is by pressing the condensing water inlet of flash tank in the high pressure drain valve access, the top of middle pressure flash tank is provided with middle compression set pressurized overflow valve, the outlet of middle compression set pressurized overflow valve accesses the entrance of described middle pressure heat exchanger by middle pressure flash distillation steam pipe, the outlet of middle pressure heat exchanger is by the condensing water inlet of middle pressure drain valve access low pressure flash chamber, the top of low pressure flash chamber is provided with low pressure level pressure overflow valve, the outlet of low pressure level pressure overflow valve accesses the entrance of described low pressure heat exchanger by the low pressure flash steam pipe, the low pressure heat exchanger exit is by the entrance of low pressure drain valve access condensate pump, the first half that the condensed water delivery side of pump accesses described fresh air preheating device makes condensed water and new wind carry out indirect heat exchange, the described wind-supplying mouth of the pre-hot blast outlet access loosening heat setting machine of described fresh air preheating device.
2. constant humidity according to claim 1, condensed water flash and sensible heat and air exhaust waste heat reclaim loosening heat setting machine, and it is characterized in that: high-pressure steam pipe, middle pressure steam pipe and low pressure steam pipe link to each other with main feed header by the first stop valve, the second stop valve and the 3rd stop valve respectively; Described main feed header directly links to each other with the entrance of described high pressure heat exchanger, links to each other with the entrance of described middle pressure heat exchanger, links to each other with the entrance of described low pressure heat exchanger by the 5th stop valve by the 4th stop valve; Described middle pressure flash distillation steam pipe is provided with the 6th stop valve, and the outlet of described the 6th stop valve also links to each other with the entrance of described middle pressure heat exchanger; Described low pressure flash steam pipe is provided with the 7th stop valve, and the outlet of described the 7th stop valve also links to each other with the entrance of described low pressure heat exchanger; The outlet of described high pressure heat exchanger is provided with the 8th stop valve, and the rear of described the 8th stop valve is in series with described high pressure drain valve; The outlet of described middle pressure heat exchanger is provided with the tenth stop valve, and the rear of described the tenth stop valve is in series with described middle pressure drain valve; Cross-over connection has the 9th stop valve between the entrance of described the 8th stop valve and described the tenth stop valve, and cross-over connection has the 11 stop valve between the entrance of described the tenth stop valve and described low pressure drain valve.
3. constant humidity according to claim 1, condensed water flash and sensible heat and air exhaust waste heat reclaim loosening heat setting machine, it is characterized in that: the air draft control valve that is controlled by the PLC controller is installed on the exhaust duct of described loosening heat setting machine, described drying chamber is equipped with humidity sensor, the holding wire of described humidity sensor accesses described PLC controller, the aperture that the moisture signal that described PLC controller provides according to described humidity sensor is regulated the air draft control valve.
4. constant humidity according to claim 1, condensed water flash and sensible heat and air exhaust waste heat reclaim loosening heat setting machine, it is characterized in that: the condensation-water drain of described middle pressure flash tank bottom is equipped with presses the pressure of flash tank automatically to regulate the front pressure automatic regulating valve of aperture in the basis, the outlet of described front pressure automatic regulating valve accesses the entrance of described low pressure flash chamber.
5. constant humidity according to claim 1, condensed water flash and sensible heat and air exhaust waste heat reclaim loosening heat setting machine, and it is characterized in that: the condensation-water drain of described low pressure flash chamber bottom accesses the entrance of described condensate pump.
According to claim 1 in 5 each described constant humidity, condensed water flash and sensible heat and air exhaust waste heat reclaim loosening heat setting machine, it is characterized in that: the front and back of described high pressure drain valve, middle pressure drain valve and low pressure drain valve are in series with respectively front stop valve and rear stop valve, are parallel with the bypass stop valve between the entrance of described front stop valve and the outlet of rear stop valve.
Priority Applications (1)
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| CN103060990B (en) | 2015-05-06 |
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Address after: 650041 Yunnan city of Kunming Province Spring City Road No. 219 Building Room 903 Eastern Investment Applicant after: YUNNAN PROVINCIAL ENERGY INVESTMENT GROUP YOUNENG SCIENCE & TECHNOLOGY CO., LTD. Address before: 650106, No. two, No. A3-505-1, Yunnan Science Park, Kunming hi tech Zone, Yunnan hi tech Zone, Yunnan Overseas Students Pioneer Park Applicant before: Yunnan Nengtou Youneng Technology Co., Ltd. |
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