Waste heat gradient utilization system of printing and dyeing mill

Abstract

The utility model provides a printing and dyeing mill waste heat gradient utilization system which is applied to a printing and dyeing mill workshop, utilizes heat energy of sewage in dye vat waste liquid discharged by a dye vat through a low-temperature flash evaporation technology, and solves the problem that a pipeline is easily blocked due to direct discharge of the sewage. The first heat pump and the second heat pump sequentially absorb hot air in a printing and dyeing mill workshop in two stages for heat exchange to generate cold air, heat energy of the printing and dyeing mill workshop can be fully recycled, and the workshop temperature is more effectively reduced and the working environment is improved through the waste heat gradient utilization technology; the flash evaporation technology is utilized, high-pressure hot water is depressurized into normal-pressure steam and hot water through the second evaporation tank, other energy does not need to be consumed, and the energy-saving effect is remarkable. According to the waste heat gradient utilization system of the printing and dyeing mill, heat in air in a workshop of the printing and dyeing mill and heat in waste liquid of the dye vat are recycled, energy can be saved, the system is environmentally friendly, and a more comfortable working environment can be provided for the factory.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial waste heat utilization technical field more particularly, relate to a kind of printing and dyeing factory waste heat cascade utilization system. BACKGROUND

[0002] In printing and dyeing factory workshop, huge printing and dyeing equipment hums, just from printing and dyeing equipment, cloth, still with scalding temperature, hot steam is white smoke, are releasing a large amount of heat to outside unceasingly.

[0003] Workers work in such high-temperature environment for a long time, not only can affect the health of workers, but also can reduce work efficiency, increase the probability of production accident, if printing and dyeing factory workshop air heat recycling, not only can save energy, green environmental protection, and can provide a more comfortable working environment for factory.

[0004] In addition, a large amount of waste heat is also generated in the printing and dyeing process, which needs to be recycled. For example, a higher temperature is usually required during dyeing, and the temperature of the discharged printing and dyeing wastewater is generally about 80-85℃, which still contains a large amount of heat that can be recycled. SUMMARY

[0005] The utility model provides a kind of printing and dyeing factory waste heat cascade utilization system to solve the technical problems that a large amount of heat in printing and dyeing factory workshop air not only waste but also high temperature leads to poor working environment, a large amount of heat carried in printing and dyeing waste liquid cannot be recycled.

[0006] The utility model provides a kind of printing and dyeing factory waste heat cascade utilization system, it is applied to printing and dyeing factory workshop, including dye vat, first heat pump and second heat pump;The first heat pump and second heat pump can cool the hot air of printing and dyeing factory workshop;

[0007] The outlet of the dye vat is communicated with the first evaporation tank, the first evaporation tank is communicated with the condenser and forms a steam passage between the two, and the air pressure of the steam passage can be adjusted to adjust the boiling point of the liquid in its space.

[0008] The hot air of printing and dyeing factory workshop enters the first heat pump through the first inlet and is discharged through the first outlet;Cold water enters the first heat pump through the second inlet and is discharged through the second outlet;

[0009] The condensing tank is provided with a heat exchanger, the first heat pump is communicated with the heat exchanger through a second outlet and enters a mixing tank through a third outlet; the mixing tank mixes two kinds of hot water with different temperatures and then flows out and enters the second heat pump through a third inlet, and then is discharged through a fourth outlet and enters a second evaporation tank; hot air in a workshop of a printing and dyeing factory enters the second heat pump through a fourth inlet and is discharged through a fifth outlet; the second evaporation tank is communicated with the mixing tank through a sixth outlet; and the condensing tank is provided with a seventh outlet to discharge hot water.

[0010] The cold air discharged from the first outlet and the fifth outlet enters a core working area of the printing and dyeing factory.

[0011] Further, the first evaporation tank is provided with a buffer device, which can prolong the time of water droplets staying in the air to improve the evaporation efficiency of water.

[0012] Further, the buffer device is composed of a tower type guide part and an inclined surface guide part, the tower type guide part is located at the upper part of the inclined surface guide part, and the inclined surface guide part is at least one layer.

[0013] Further, a boiler is further included, and the boiler is connected with the condensing tank through the seventh outlet.

[0014] Further, an ejector for mixing and pressurizing to realize the function of pressure boosting is further included, the ejector introduces steam in an industrial steam pipe network through a fifth inlet, the second evaporation tank is connected with the ejector through an eighth outlet, and the ejector is connected with the dye vat through a ninth outlet.

[0015] Further, a setting machine is further included, and the setting machine introduces industrial steam pipe network to obtain heat energy through a sixth inlet.

[0016] Further, the steam output by the ejector can provide heat energy for the setting machine.

[0017] Further, a compressor is arranged between the ejector and the setting machine, the ejector is connected with the compressor through the ninth outlet, and the compressor enters the setting machine through the sixth inlet.

[0018] Further, a vacuum pump is arranged on the upper part of the side wall of the first evaporation tank or the upper part of the side wall of the condensing tank, and the space formed among the first evaporation tank, the steam channel and the condensing tank can be adjusted in air pressure through the vacuum pump.

[0019] Further, a filter is further included, an input end of the filter is connected with a discharge outlet of the dye vat, and an output end of the filter is connected with the mixing tank.

[0020] The printing and dyeing factory cooling and heating system has the advantages that:

[0021] The utility model discloses a printing and dyeing factory waste heat cascade utilization system, through the first evaporation tank reduction dye vat waste liquid's boiling point will water vaporization in it, and in the condensing tank meets the warm water in heat exchanger and produces liquefaction phase change, heats the warm water, through low temperature flash evaporation technology, utilizes the heat energy of sewage in the dye vat waste liquid that dye vat discharged, solves the problem that sewage directly discharges and is easy to block pipeline simultaneously, through the first heat pump, the hot air of printing and dyeing factory workshop and cold water carry out heat exchange, output cold air to the core working area of printing and dyeing factory workshop, and the cold water is heated and exports the warm water to the heat exchanger, effectively recycles and utilizes the hot air of printing and dyeing factory workshop, and the workshop temperature of the core working area of printing and dyeing factory workshop carries out primary cooling, through the mixing tank, the hot water of heat exchanger discharge and other hot water are mixed and provide the hot water that second heat pump needs, and the second heat pump carries out heat exchange to the hot air of printing and dyeing factory workshop and hot water, exports high pressure hot water to the second evaporation tank, and the second heat pump generates high pressure hot water after absorbing the hot air of printing and dyeing factory workshop and heating hot water, effectively recycles and utilizes the hot air of printing and dyeing factory workshop, and the workshop temperature of the core working area of printing and dyeing factory workshop carries out secondary cooling, and the cooling effect is remarkable, through the first heat pump and second heat pump, the hot air of printing and dyeing factory workshop is absorbed in two stages and carries out heat exchange and generates cold air, can fully recycle the heat energy of printing and dyeing factory workshop, through waste heat cascade utilization technology, more effectively reduces the workshop temperature, and improves the working environment, utilizes flash evaporation technology, through the second evaporation tank, high pressure hot water is reduced and becomes normal pressure water vapor and hot water, does not need to consume other energy, and the energy-saving effect is remarkable.

[0022] Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments thereof, with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present utility model and, together with the description, serve to explain the principles of the present utility model.

[0024] Figure 1 It is the structure schematic view of printing and dyeing factory waste heat cascade utilization system of the utility model embodiment;

[0025] Figure 2 It is the schematic diagram of the first evaporation tank buffer device in printing and dyeing factory waste heat cascade utilization system of the utility model embodiment;

[0026] Figure 3 It is the structure schematic view of printing and dyeing factory waste heat cascade utilization system of still another utility model embodiment.

[0027] Reference Signs:

[0028] Dye vat 1, first heat pump 2, second heat pump 3, first evaporation tank 4; condensation tank 5; steam passage 6; heat exchanger 7; mixing tank 8; second evaporation tank 9; core working area of printing and dyeing plant workshop 10; buffer device 11; tower type guide part 12; inclined surface guide part 13; boiler 14; ejector 15; industrial steam pipe network 16; setting machine 17; first valve 18; compressor 19; vacuum pump 20; second valve 21; filter 22;

[0029] First inlet 101; second inlet 102; third inlet 103; fourth inlet 104; fifth inlet 105; sixth inlet 106;

[0030] First outlet 201; second outlet 202; third outlet 203; fourth outlet 204; fifth outlet 205; sixth outlet 206; seventh outlet 207; eighth outlet 208; ninth outlet 209, tenth outlet 210. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0032] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application or its application or uses.

[0033] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus should be considered as part of the description of the present application.

[0034] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of exemplary embodiments can have different values.

[0035] It should be noted that like reference numerals and letters in the various figures indicate similar items, and thus, once any term is defined in one figure, it is not necessary to discuss it further in connection with other figures.

[0036] In the description of the present application, if the terms "first", "second" features are mentioned, it can be explicitly or implicitly included one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, in the description and claims of the present application, "and / or" indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0037] In the description of the utility model, need understanding, if relate to the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" such as the orientation or positional relationship indicated by the drawing shown orientation or positional relationship, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element referred to must have a particular orientation, with a particular orientation configuration and operation, therefore can not be understood as the restriction of the utility model.

[0038] In the description of the utility model, it should be explained that, unless otherwise expressly provided and limited, the terms "installation", "connection", "connection" involved should be understood broadly.For example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements.For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] The printing and dyeing plant waste heat cascade utilization system according to the embodiments of the utility model will be described in detail below with reference to the drawings.

[0040] The printing and dyeing plant waste heat cascade utilization system according to the embodiments of the utility model is applied to a printing and dyeing plant workshop, comprising a dye vat 1, a first heat pump 2 and a second heat pump 3;The first heat pump 2 and the second heat pump 3 can cool the hot air of the printing and dyeing plant workshop;The air in the printing and dyeing plant workshop is about 40 DEG C, different dyes require different dyeing temperatures, for example, the high temperature and high pressure dyeing temperature of disperse dye can reach 140 DEG C.Therefore, the working temperature required by the dye vat 1 is 140 DEG C, and the temperature of the dye vat waste liquid is generally about 85 DEG C.

[0041] The outlet of dyeing vat 1 is connected to the first evaporator 4, which is used to evaporate the waste liquid from the dyeing vat to vaporize the water. The first evaporator 4 is connected to the condenser 5, forming a steam channel 6 between them. The waste liquid from the dyeing vat 1 at 85°C first enters the first evaporator 4 from the outlet. The pressure of the steam channel 6 is adjustable to adjust the boiling point of the liquid within it. Since the first evaporator 4, the steam channel 6, and the condenser 5 are connected, the pressure of any one of these three spaces can be adjusted to adjust the boiling point of the liquid in the space between the first evaporator 4 and the condenser 5. Preferably, the pressure in the space between the first evaporator 4 and the condenser 5 can be adjusted by a vacuum pump 20. The vacuum pump 20 can be connected to any one of the components: the first evaporator 4, the steam channel 6, or the condenser 5. The vacuum pump 20 is located on the top or side wall of any of these components, above the liquid surface. Figure 1 For example, the vacuum pump 20 is connected to the condenser tank 5 and is located on the upper side wall of the condenser tank 5. Preferably, a second valve 21 is also provided between the vacuum pump 20 and the condenser tank 5. The second valve 21 can control the operation of the vacuum pump 20 on the condenser tank 5. The boiling point of a liquid is related to the gas pressure. As the gas pressure decreases, the boiling point of the liquid also decreases. In this embodiment, liquid spraying technology is preferably used for condensation and vaporization. Specifically, the pressure in the first evaporator tank 4, the condenser tank 5, and the steam channel 6 is reduced by the suction action of the vacuum pump 20 to be lower than atmospheric pressure, and the corresponding boiling point of water vapor drops to 70°C. Then, the second valve 21 is closed. Some of the 85°C hot water in the dyeing waste liquid flashes into 70°C clean water vapor, and the 70°C clean water vapor enters the condenser tank 5 through the steam channel 6. The waste liquid with a large amount of pollutants remaining in the first evaporator tank 4 is discharged through the tenth outlet 210 on the first evaporator tank 4 and sent to the sewage treatment center for further treatment.

[0042] The hot air in the dyeing and printing factory workshop is generally 40℃. A first heat pump 2 and a second heat pump 3 are installed in the workshop; the first heat pump 2 is preferably a low-temperature air source heat pump, and the second heat pump 3 is preferably a high-temperature air source heat pump. The low-temperature air source heat pump (first heat pump 2) absorbs the 40℃ hot air from the workshop, which enters the first heat pump 2 through the first inlet 101; 20℃ cold water enters the first heat pump 2 through the second inlet 102. The first heat pump 2 exchanges heat between the 40℃ hot air and the 20℃ cold water, reducing the temperature of the 40℃ hot air to 20℃ and discharging it through the first outlet 201. The 20℃ cold water is heated to 32℃ and discharged through the second outlet 202. The 20℃ cold air, discharged through the first outlet 201, enters the core working area 10 of the workshop, providing primary cooling for the workshop.

[0043] A heat exchanger 7 is installed inside the condenser tank 5. The first heat pump 2 is connected to the heat exchanger 7 via the second outlet 202 and enters the mixing tank 8 via the third outlet 203. 32°C warm water is discharged through the second outlet 202 and enters the heat exchanger 7. The 70°C steam in the condenser tank 5 undergoes a phase change upon encountering the heat exchanger 7, changing from a gaseous state to a liquid state. This liquefaction of the 70°C steam releases a large amount of heat energy, which heats the 32°C warm water in the heat exchanger 7 to 60°C, entering the mixing tank 8 via the third outlet 203. To increase the contact area between the 70°C steam and the heat exchanger 7 in the condenser tank 5 and improve the phase change efficiency, the heat exchanger 7 inside the condenser tank 5 can be designed as follows: Figure 1 The folded pipe shown can also be designed as a surrounding pipe encircling the inner wall of the condenser 5. The heat exchanger 7 can rapidly liquefy 70℃ steam and create a vacuum environment, ensuring that the vacuum level in the first evaporator 4 and the condenser 5 is not broken, thus ensuring condensation efficiency. The liquefied 70℃ hot water is discharged through the seventh outlet 207. Alternatively, the seventh outlet 207 can be connected to the boiler 14. After the 70℃ steam contacts the heat exchanger 7 and undergoes a phase change and releases heat, it becomes 70℃ clean hot water, which can then be used to replenish water for the boiler 14 and enter the water tank, further recovering and utilizing energy and reducing costs.

[0044] The mixing tank 8 can mix two types of hot water at different temperatures, and the mixture then enters the second heat pump 3 through the third inlet 103. For example... Figure 1 As shown, 60°C hot water flowing out from the third outlet 203 enters the mixing tank 8 and mixes with 100°C hot water. After mixing, it becomes 90°C hot water, which enters the second heat pump 3 through the third inlet 103. The second heat pump 3 is preferably a high-temperature air source heat pump. The high-temperature air source heat pump (second heat pump 3) absorbs 40°C hot air from the dyeing and printing workshop. The 40°C hot air enters the second heat pump 3 through the fourth inlet 104. The 90°C hot water enters the second heat pump 3 through the third inlet 103. The second heat pump 3 exchanges heat between the 40°C hot air and the 90°C hot water. The 40°C hot air is reduced to 20°C and discharged through the fifth outlet 205. The 90°C hot water is raised to 110°C hot water under the high pressure environment of the second heat pump 3 (the air pressure inside the high-temperature air source heat pump is higher than atmospheric pressure) and discharged through the fourth outlet 204 into the second evaporator 9. The 20°C cold air is discharged through the fifth outlet 205 into the core working area 10 of the dyeing and printing workshop, which performs secondary cooling of the dyeing and printing workshop.

[0045] The second evaporator 9 is connected to the mixing tank 8 via the sixth outlet 206. The second evaporator 9 is under normal pressure. The boiling point of water vapor at room temperature is 100℃. Therefore, when 110℃ hot water enters the second evaporator 9, part of it is flashed into 100℃ water vapor, and part of it becomes 100℃ hot water and enters the mixing tank 8 via the sixth outlet 206 to provide a heat source for mixing the hot water in the mixing tank 8.

[0046] The utility model discloses a printing and dyeing factory waste heat cascade utilization system, through the first evaporation jar 4 reduction of vat waste liquid boiling point will be in it moisture vaporization, and in the condensing jar 5 meet the heat exchanger 7 in 32 DEG C warm water produces liquefaction phase change, heats to 60 DEG C with 32 DEG C warm water, through low temperature flash evaporation technology, utilize the heat energy of sewage in the vat 1 discharge vat waste liquid, solved the problem that sewage direct discharge is easy to block pipeline simultaneously, through the first heat pump 2, the printing and dyeing factory workshop 40 DEG C hot air and 20 DEG C cold water carry out heat exchange, output 20 DEG C cold air to the core working area 10 of printing and dyeing factory workshop, and 20 DEG C cold water is heated to 32 DEG C warm water to the heat exchanger 7, effectively recycling the printing and dyeing factory workshop 40 DEG C hot air, the workshop temperature of core working area 10 of printing and dyeing factory workshop carries out primary cooling, through the mixing jar 8, the heat exchanger 7 discharge 60 DEG C hot water and 100 DEG C hot water are mixed and provide the required 90 DEG C hot water for the second heat pump 3, and the second heat pump 3 carries out heat exchange with 40 DEG C hot air and 90 DEG C hot water of printing and dyeing factory workshop, exports high pressure 110 DEG C hot water to the second evaporation jar 9. The second heat pump 3 generates high pressure 110 DEG C hot water after heating 90 DEG C hot water with 40 DEG C hot air of printing and dyeing factory workshop, effectively recycling the printing and dyeing factory workshop 40 DEG C hot air, the workshop temperature of core working area 10 of printing and dyeing factory workshop carries out secondary cooling, and the cooling effect is remarkable, through the first heat pump 2 and the second heat pump 3, 40 DEG C hot air of printing and dyeing factory workshop is absorbed in two stages and carries out heat exchange to generate 20 DEG C cold air, can fully recover the heat energy of printing and dyeing factory workshop, through waste heat cascade utilization technology, more effectively reduce the workshop temperature, improve the working environment, utilize flash evaporation technology, through the second evaporation jar 9, high pressure 110 DEG C hot water is reduced to normal pressure 100 DEG C water vapor and 100 DEG C hot water, without consuming other energy, and the energy-saving effect is remarkable.

[0047] As Figure 2As shown, in order to accelerate the evaporation of moisture and uniform water, a water spray pipe (not shown in the figure) is installed on the upper part of the first evaporation tank 4, and a plurality of small holes are arranged on the water spray pipe to spray the water flow into a plurality of small water columns; meanwhile, a buffer device 11 is arranged in the first evaporation tank 4, which can prolong the residence time of water droplets in the air to improve the evaporation efficiency of moisture. The buffer device 11 is composed of a tower type guide part 12 and an inclined surface guide part 13, and the tower type guide part 12 is located at the upper part of the inclined surface guide part 13. The 85 DEG C waste liquid flowing into the dye vat 1 flows down from the small holes on the water spray pipe, and the water droplets condensed from the water vapor in the upper layer of the first evaporation tank 4 fall in the falling process. The tower type guide part 12 guides the water droplets from the original free fall to slowly flow down along the inclined edge of the tower type guide part 12, and the included angle between the two inclined edges of the tower type guide part is preferably 20 DEG to 50 DEG. The tower type guide part can be designed into multiple layers according to the capacity of the first evaporation tank 4 and the design requirements, and the adjacent two tower type guide parts are staggered to ensure that the water droplets flowing down from the inclined edge of the upper tower type guide part enter the upper part of the lower tower type guide part and continue to be divided. The inclined surface guide part 13 is arranged below the tower type guide part 12, and the included angle between the inclined surface guide part 13 and the vertical surface is preferably 20 DEG to 50 DEG. The water droplets continue to flow slowly after entering the inclined surface guide part 13 from the tower type guide part 12. The inclined surface guide part 13 can be designed into one layer or multiple layers according to requirements, and the inclined directions of the inclined surface guide parts between the adjacent two layers can be relatively arranged to prolong the residence time of the water droplets in the air as much as possible. The buffer device 11 can be directly welded on the inner wall of the first evaporation tank 4, or can be detachably fixed on the inner wall of the first evaporation tank 4. When the water droplets condensed from the water vapor in the upper layer of the first evaporation tank 4 fall, the tower type guide part 12 and the inclined surface guide part 13 guide the water droplets to prolong the residence time in the air, which is more easily evaporated, thereby improving the evaporation efficiency.

[0048] The waste heat cascade utilization system of the printing and dyeing plant further comprises an ejector 15 for mixing and pressurizing to realize the boosting function, and the ejector 15 can provide the required working heat for the dye vat 1 through mixing and pressurizing. Specifically, 200 DEG C steam in the industrial steam pipe network 16 is introduced into the fifth inlet 105 of the ejector 15, 100 DEG C steam in the second evaporation tank 9 is connected to the eighth outlet 208 of the ejector 15, the 100 DEG C steam in the second evaporation tank 9 enters the ejector 15, the ejector 15 is connected to the dye vat 1 through the ninth outlet 209, and the ejector 15 mixes the 100 DEG C steam from the second evaporation tank 9 with the 200 DEG C steam from the industrial steam pipe network 16. By using the ejector boosting technology, the 100 DEG C steam is boosted to 140 DEG C steam through the ejector suction effect of the 200 DEG C steam from the industrial steam pipe network 16, and the 140 DEG C steam enters the dye vat 1 through the ninth outlet 209. The system waste heat is fully recovered, and energy saving and emission reduction are achieved.

[0049] The printing and dyeing factory waste heat cascade utilization system further comprises a setting machine 17, the setting machine 17 is introduced into the industrial steam pipe network 16 through the sixth inlet 106 to obtain heat energy, and the first valve 18 is arranged between the industrial steam pipe network 16 and the setting machine 17, so that the transportation of 200 DEG C steam is controlled. The industrial steam pipe network 16 for centralized gas supply is introduced into the setting machine 17 through the sixth inlet 106, and 200 DEG C steam is provided for the working of the setting machine 17.

[0050] Further, considering that the steam price of the industrial steam pipe network 16 is relatively high, in some printing and dyeing factory waste heat cascade utilization systems of the utility model, the 140 DEG C steam output by the ejector 15 provides heat energy for the setting machine 17, so that the dependence on the industrial steam pipe network 16 is reduced, and the cost is reduced.

[0051] Specifically, the compressor 19 is arranged between the ejector 15 and the setting machine 17, the ejector 15 is connected with the compressor 19 through the ninth outlet 209, and the compressor 19 enters the setting machine 17 through the sixth inlet 106. The 140 DEG C steam in the ejector 15 enters the compressor 19 through the ninth outlet 209, and the compressor 19 converts the 140 DEG C steam into 200 DEG C steam which enters the setting machine 17 through the sixth inlet 106. Through the compression of the compressor 19, a part of the 140 DEG C steam generated by the ejector 15 is heated to 200 DEG C steam for the setting machine 17, compared with directly introducing 200 DEG C steam from the industrial steam pipe network 16 into the setting machine 17, the cost can be reduced by about 50%.

[0052] As shown in the figure. Figure 3 The printing and dyeing factory waste heat cascade utilization system further comprises a filter 22, the input end of the filter 22 is connected with the discharge outlet of the dye vat 1, and the output end of the filter 22 is connected with the mixing tank 8. That is, the dye vat waste liquid of the dye vat 1 can also be directly introduced into the mixing tank 8 after being filtered through the filter 22, and after the filtered 85 DEG C hot water enters the mixing tank 8 through the filter 22, the mixing tank 8 can mix the 85 DEG C hot water with 100 DEG C hot water to generate 90 DEG C hot water into the second heat pump 3. Through the full use of the waste heat of the dye vat waste liquid, energy saving and emission reduction are further achieved.

[0053] Of course, other structures of the printing and dyeing factory waste heat cascade utilization system and working principles thereof can be understood and realized by those skilled in the art, and will not be described in detail in the utility model.

[0054] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. A printing and dyeing plant waste heat cascade utilization system applied to a printing and dyeing plant workshop, characterized in that, It comprises a dye vat (1), a first heat pump (2) and a second heat pump (3); the first heat pump (2) and the second heat pump (3) can cool the hot air in the workshop of the printing and dyeing factory; The outlet of the dye vat (1) is communicated with a first evaporation tank (4), the first evaporation tank (4) is communicated with a condensation tank (5) and forms a steam passage (6) between the two, the air pressure of the steam passage (6) can be adjusted to adjust the boiling point of the liquid in the space thereof; The hot air in the workshop of the printing and dyeing factory enters the first heat pump (2) through a first inlet (101) and is discharged through a first outlet (201); cold water enters the first heat pump (2) through a second inlet (102) and is discharged through a second outlet (202); The condensation tank (5) is provided with a heat exchanger (7), the first heat pump (2) is communicated with the heat exchanger (7) through the second outlet (202) and enters a mixing tank (8) through a third outlet (203); the mixing tank (8) mixes two kinds of hot water with different temperatures and then flows out and enters the second heat pump (3) through a third inlet (103), and is discharged through a fourth outlet (204) to enter a second evaporation tank (9); the hot air in the workshop of the printing and dyeing factory enters the second heat pump (3) through a fourth inlet (104) and is discharged through a fifth outlet (205); the second evaporation tank (9) is communicated with the mixing tank (8) through a sixth outlet (206); the condensation tank (5) is provided with a seventh outlet (207) to discharge hot water; The cold air discharged from the first outlet (201) and the fifth outlet (205) enters the core working area (10) of the printing and dyeing factory.

2. The system according to claim 1, wherein, The first evaporation tank (4) is provided with a buffer device (11), which can prolong the residence time of water droplets in the air to improve the evaporation efficiency of water.

3. The system according to claim 2, wherein, The buffer device (11) is composed of a tower type guide part (12) and an inclined surface guide part (13), the tower type guide part (12) is located at the upper part of the inclined surface guide part (13), and the inclined surface guide part (13) is at least one layer.

4. The system according to claim 1, wherein It also comprises a boiler (14) connected with the condensation tank (5) through the seventh outlet (207).

5. The system according to claim 1, wherein It also comprises an ejector (15) for mixing and pressurizing to realize the function of pressure boosting, the ejector (15) introduces steam in the industrial steam pipe network (16) through a fifth inlet (105), the second evaporation tank (9) is connected with the ejector (15) through an eighth outlet (208), and the ejector (15) is connected with the dye vat (1) through a ninth outlet (209).

6. The system according to claim 5, wherein, It also comprises a setting machine (17) which introduces industrial steam pipe network (16) through a sixth inlet (106) to obtain heat energy.

7. The system according to claim 6, wherein, The steam output by the ejector (15) can provide heat energy for the setting machine (17).

8. The system according to claim 7, wherein, A compressor (19) is arranged between the ejector (15) and the setting machine (17), the ejector (15) is connected with the compressor (19) through the ninth outlet (209), and the compressor (19) enters the setting machine (17) through the sixth inlet (106).

9. The system for cascade utilization of waste heat in a textile printing and dyeing mill according to claim 1, characterized in that, A vacuum pump (20) is arranged on the upper part of the side wall of the first evaporation tank (4) or the upper part of the side wall of the condensation tank (5), and the space formed among the first evaporation tank (4), the steam channel (6) and the condensation tank (5) can be regulated in air pressure by the vacuum pump (20).

10. The system for cascade utilization of waste heat in a textile printing and dyeing mill according to claim 1, characterized in that, A filter (22) is further included, an input end of the filter (22) is connected with the discharge port of the dye vat (1), and an output end of the filter (22) is connected with the mixing tank (8).

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