A kind of printing and dyeing mill steam fabric setting machine step waste heat comprehensive utilization system
Technical field
The invention provides a kind of printing and dyeing mill steam fabric setting machine step waste heat comprehensive utilization system, qualitative to concentrate middle pressure steam to substitute conduction oil.
Background technology
Printing and dyeing enterprise is the rich and influential family of heat, electric consumption, needs a large amount of heating steams in printing and dyeing and rear arrangement process.212 of the existing printing and dyeing enterprises of Shaoxing County (steam power plant's heat supply separately vertical table user is 250), printing and dyeing enterprise more than 95% has adopted central heating, but the steam of conventional heat supply is because low for thermal pressure, its saturated-steam temperature is low (being generally less than 160 ℃) also, the chemical ﹠ blended fabric setting temperature will reach more than 180 ℃ at least, and the heat of steam is mainly the latent heat of vaporization, if utilize the steam of the conventional heat supply chemical ﹠ blended fabric of finalizing the design, can't utilize its latent heat of vaporization, therefore, most of printing and dyeing enterprise all adopts the conduction oil typing.With 6000 tons of calculating of every printing and dyeing enterprise year consumption mark coal, dyeing coal burning heat-conducting oil boiler year, consumption mark coal total amount was above 1,200,000 tons.And the coal burning heat-conducting oil boiler thermal output that general printing and dyeing enterprise oneself management is used is low, and dust-removal and desulfurizing rate difficulty is large, and unit drops into also higher, is unfavorable for energy-saving and emission-reduction, and the performance of conduction oil can fail with service time, needs regularly replacing, and maintenance cost is high; There is again high temperature danger on fire, therefore substituted necessity and urgency is arranged.At present, some enterprise begins with the natural gas typing, and natural gas straight taps into the workshop, and directly burning in equipment, and leakage point is difficult the discovery, produces explosion potential on fire larger, neither first-selected typing approach.
So those skilled in the art are badly in need of designing a kind of printing and dyeing mill printing and dyeing enterprise production, that meet environmental requirement fabric setting machine step waste heat comprehensive utilization system that is applicable to, this case produces thus.
Summary of the invention
For solving the above-mentioned technical problem of prior art, the invention provides a kind of printing and dyeing mill steam fabric setting machine step waste heat comprehensive utilization system, utilize the extraction steam for factories of cogeneration units behind the pressure matcher adherence pressure, to satisfy existing printing and dyeing enterprise heat setting machine to the demand of middle pressure steam, alleviate environmental pressure to replace the coal-fired thermal oil furnace that disperses, improve the cogeneration of heat and power benefit.
For achieving the above object, the present invention is achieved by the following technical solutions:
A kind of printing and dyeing mill steam fabric setting machine step waste heat comprehensive utilization system, comprise the heat setting machine condensed water exhaust steam double flash evaporation therrmodynamic system that is communicated with the pressure matching system, described heat setting machine condensed water exhaust steam double flash evaporation therrmodynamic system comprises the heat setting machine condensed water collecting device, control device, multistage flash distillation device, electric operator and high temperature cavitation-preventive water pump, described heat setting machine condensed water collecting device has multistage flash distillation device by pipeline connection, multistage flash distillation device is communicated with respectively steam (back pressure) heat supply network, booster pump station and multiinjector heat pump, the multiinjector heat pump is communicated with the machine cylinder by the low-pressure steam pipeline; Electric operator links to each other with multiinjector heat pump governor motion by support, and control device is connected with multistage flash distillation device, Liquid level adjusting valve and high temperature cavitation-preventive water pump respectively.
Described pressure matching system comprises the exhaust steam pressure matcher, described exhaust steam pressure matcher connects respectively power boiler, extraction pressure pipeline, back pressure steam pipework and heat setting machine condensed water aspirator by pipeline, is provided with temperature-adjusting device between described power boiler and the exhaust steam pressure matcher.
Described temperature-adjusting device is the steam direct-contact desuperheater.
Described multistage flash distillation device comprises by the one-level nature flash tank of pipeline connection and secondary forces the suction flash tank, pipeline between one-level nature flash tank and the heat setting machine condensed water collecting device is provided with into the water gate valve, one-level nature flash tank and secondary force the pipeline between the suction flash tank to be provided with Liquid level adjusting valve, and secondary forces the pipeline between suction flash tank and the multiinjector heat pump to be provided with check valve set.
Be connected with electric operator on the described multiinjector heat pump.
Described one-level nature flash tank and secondary are forced to be respectively equipped with liquid level gauge on the suction flash tank, and liquid level gauge connects control device, and control device is electrically connected with Liquid level adjusting valve.
Described secondary forces to be provided with between suction flash tank and the booster pump station the anti-cavitation water pump group of two high temperature; Be provided with check valve set on the pipeline before the described anti-cavitation water pump group of each group high temperature and the booster pump station, and the anti-cavitation water pump group of each group high temperature is connected with control device.
Described control device comprises the thermal control cabinet, and the thermal control cabinet connects liquid level gauge, high temperature anti-cavitation water pump group, electric operator and check valve set.
Beneficial effect of the present invention is as follows:
1, owing to having adopted technique scheme, compared with prior art, the present invention adopts double flash evaporation, by the coupling transformation of steam shaping control initial steam pressure, obtains different steam pressures and satisfies; Heat setting machine is to the demand of middle pressure steam.Can satisfy the needed different setting temperature of fabric of different cultivars; Steam temperature field under saturation state can remain unchanged.
2, the present invention adopts steam shaping can improve the heat transform generate electricity amount of steam power plant etc., thereby improves efficiency of energy utilization, reduces energy resource consumption.Simultaneously, the thermal source units such as steam power plant have two road steam of different pressures to enter printing and dyeing mill etc. to use heat unit, can improve printing and dyeing mill etc. with the reliability of heat unit with vapour.
3, the present invention can reduce the use amount of printing and dyeing enterprise to heat conducting oil boiler; Alleviate environmental pressure; Get final product the power consumption of economized cycle oil pump, increased again the delivery of steam power plant, can effectively solve electricity shortage.In addition, according to the actual needs, the present invention can utilize setting machine waste gas or heating system to mend wind, effectively reduces operating cost.
Description of drawings
Fig. 1 is printing and dyeing mill of the present invention steam fabric setting machine step waste heat comprehensive utilization system schematic diagram;
Fig. 2 is pressure matching system schematic diagram of the present invention;
Fig. 3 is heat setting machine condensed water exhaust steam double flash evaporation therrmodynamic system schematic diagram of the present invention.
Wherein, 1 is the exhaust steam pressure matcher, 2 is the steam direct-contact desuperheater, 3 is power boiler, 4 is the extraction pressure pipeline, 5 is the back pressure steam pipework, 6 is mixed vapour (middle pressure), 7 is one-level nature flash tank, 8 are secondary pressure suction flash tank, 9 is high temperature cavitation-preventive water pump group, 10 is check valve set, 11 is electric operator, 12 is the multiinjector heat pump, 13 is Liquid level adjusting valve, 14 are the thermal control cabinet, 15 is liquid level gauge, 16 is booster pump station, 17 is heat setting machine condensation water collection pipe, 18 is steam (back pressure) heat supply network, 19 are the water inlet gate valve, 20 is the low-pressure steam pipeline, 21 is the machine cylinder, 22 is support.
The specific embodiment
The present invention is further illustrated below in conjunction with specific embodiment, but protection scope of the present invention is not limited to this.
As depicted in figs. 1 and 2, printing and dyeing mill of the present invention steam fabric setting machine step waste heat comprehensive utilization system, comprise the heat setting machine condensed water exhaust steam double flash evaporation therrmodynamic system that is communicated with the pressure matching system, heat setting machine condensed water exhaust steam double flash evaporation therrmodynamic system comprises heat setting machine condensed water collecting device 17, control device, multistage flash distillation device, electric operator 11 and high temperature cavitation-preventive water pump 9, and heat setting machine condensed water collecting device 17 has multistage flash distillation device by pipeline connection; Multistage flash distillation device is communicated with respectively steam (back pressure) heat supply network 18, booster pump station 16 and multiinjector heat pump 12, and multiinjector heat pump 12 is communicated with machine cylinder 21 by low-pressure steam pipeline 20.Electric operator 11 links to each other with multiinjector heat pump 12 governor motions by support 22, force the height control of the pressure of flash distillation plant 8 to be transported to the pressure of the steam of machine cylinder 21 according to secondary, also the controlled back pressure that heats the setting machine drain valve changes hot blast temperature in the heat setting machine.Control device is connected with high temperature cavitation-preventive water pump with multistage flash distillation device, Liquid level adjusting valve 13 by shielded cable and is connected.
The pressure matching system comprises exhaust steam pressure matcher 1, exhaust steam pressure matcher 1 connects respectively power boiler 3, extraction pressure pipeline 4, back pressure steam pipework 5 and heat setting machine condensed water aspirator 17 by pipeline, is provided with steam direct-contact desuperheater 2 between power boiler 3 and the exhaust steam pressure matcher 1.
Multistage flash distillation device comprises by the one-level nature flash tank 7 of pipeline connection and secondary forces suction flash tank 8, pipeline between one-level nature flash tank 7 and the heat setting machine condensed water collecting device 17 is provided with into water gate valve 19, one-level nature flash tank 7 and secondary force the pipeline between the suction flash tank 8 to be provided with Liquid level adjusting valve 13, and secondary forces the pipeline between suction flash tank 8 and the multiinjector heat pump 12 to be provided with check valve set 10; Be connected with electric operator 11 on the multiinjector heat pump 12.
One-level nature flash tank 7 and secondary are forced to be respectively equipped with liquid level gauge 15 on the suction flash tank 8, and liquid level gauge 15 connects control device, and control device is connected with Liquid level adjusting valve 13.
Secondary forces to be provided with between suction flash tank 8 and the booster pump station 16 the anti-cavitation water pump group 9 of two high temperature; Be provided with check valve set 10 on the pipeline before the anti-cavitation water pump group 9 of each group high temperature and the booster pump station 16, and the anti-cavitation water pump group 9 of each group high temperature is electrically connected with control device.Control device comprises thermal control cabinet 14, and thermal control cabinet 14 connects liquid level gauge 15, high temperature anti-cavitation water pump group 9, electric operator 11 and check valve set 10.
During work, the steam in the power boiler 3 is 75t/h, 9.81MPa, 538 ℃, after attemperator 2 cooling, after the steam in exhaust steam pressure matcher 1 and suction pressure pipeline 4, the back pressure steam pipework 5, to steam (back pressure) heat supply network 18 supply 5-25t/h middle pressure steams.
Water in the heat setting machine condensation water collection pipe 17 enters into one-level nature flash tank 7 by water inlet gate valve 19, enter into secondary by Liquid level adjusting valve 13 again and force suction flash tank 8, so just obtained the flash-off steam of two kinds of pressure, can observe the interior liquid level situation of change of flash tank by liquid level gauge 15 during this time, regulate the flash tank internal pressure by anti-cavitation water pump group 9 and booster pump station 16 and change, guarantee the temperature of flash-off steam.Flash-off steam enters into multiinjector heat pump 12, flash-off steam is assigned in the operating mechanism that needs by multiinjector heat pump 12, realizes fabric heat-setting.
HEAT SETTING is to utilize the thermoplasticity of synthetic fiber, fabric is kept certain size and model attitude, be heated to temperature required, make the aggravation of fiber molecule chain movement, the fiber internal stress reduces, and degree of crystallinity and crystalline region increase to some extent, and amorphous area is taken advantage of in concentrating, fibre structure is further perfect, makes the DIMENSIONAL STABILITY of fiber and fabric thereof obtain to improve.State when the method for taking again mandatory down to overflow makes fabric remain on HEAT SETTING, otherwise fabric can shrink because of the effect of heat after clot, also may produce the fine wrinkle that is difficult to eliminate.
The present invention adopts double flash evaporation, by steam shaping control initial steam pressure, obtains the needed different setting temperature of fabric of different cultivars.Steam is temperature-resistant under saturation state.
The present invention adopts steam shaping can improve the heat transform generate electricity amount of steam power plant etc., thereby improves efficiency of energy utilization, reduces energy resource consumption.Simultaneously, the thermal source units such as steam power plant have two road steam of different pressures to enter printing and dyeing mill etc. to use heat unit, can improve printing and dyeing mill etc. with the reliability of heat unit with vapour.
The present invention has reduced the power consumption of printing and dyeing enterprise heat conducting oil boiler, has increased again the delivery of steam power plant, can effectively solve electricity shortage.In addition, according to the actual needs, the present invention can utilize setting machine waste gas or heating system to mend wind, effectively reduces heat cost.
Above-described embodiment only is used for explaining inventive concept of the present invention, but not to the restriction of rights protection of the present invention, allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should fall into protection scope of the present invention.