A chemical additive recovery device for textile fabric printing and dyeing

Abstract

The present invention relates to a chemical additive recovery device for textile fabric printing and dyeing, aiming to solve the technical problem of insufficient recovery of chemical additives during current textile fabric printing and dyeing, comprising an air pump connected to the exhaust port of a dyeing machine, a cooler connected to the output end of the air pump, a multi-stage recovery system connected to the output end of the cooler, the multi-stage recovery system comprising a plurality of chemical additive recovery lines and a chemical additive replenishing tank; the chemical additive recovery line comprises a recovery tank; and a gas-liquid separation mechanism and a heater are arranged in the recovery tank. The present invention utilizes the different boiling points of each chemical additive to sequentially increase the temperature to evaporate different chemical additives, thereby recovering the chemical additives in the exhaust gas of the dyeing machine, and then through the concentration detection and liquid replenishment method, the recovered chemical additives are returned to the dyeing machine for reuse. Compared with the recovery method of the prior art, the present invention not only fully recovers, but also avoids the problem of safety risks of chemical additives spilling in the exhaust gas during textile fabric printing and dyeing, and is energy-saving and environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of textile fabric printing and dyeing, and in particular to a chemical auxiliary agent recovery device for textile fabric printing and dyeing. Background Art

[0002] With the progress of the times and the development of science and technology, chemical technology plays an important role in the field of textile printing and dyeing. It can not only improve the appearance and performance of textiles, but also improve production efficiency and save resources.

[0003] In the existing dyeing and printing technology, the printing and dyeing solvent is usually recovered from the dyeing and printing wastewater, and the coagulation method can be used to flocculate and precipitate the chemical agents, but there are still risks in the use of chemical agents in the dyeing and printing process. For example, tetrachloroethylene, as a universal printing and dyeing solvent, will cause great harm to the human body if it is not recovered, such as acute poisoning or contact dermatitis or other contact injuries. In the prior art, in order to avoid the harm of chemical agents to the human body, a breathing mask can be used for protection or a printing and dyeing equipment for textile fabric production provided by the Chinese invention patent with publication number CN107475957A can be used to recover chemical reagents by vacuum condensation and recycling. Although the above technical scheme can recover chemical agents, it has a simple structure and insufficient gas-liquid separation. Therefore, how to propose a new chemical auxiliary agent recovery device is particularly important. In view of this, we propose a chemical auxiliary agent recovery device for textile fabric printing and dyeing. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, meet practical needs, and provide a chemical additive recovery device for textile fabric printing and dyeing to solve the current technical problem of insufficient recovery of chemical additives during textile fabric printing and dyeing.

[0005] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is as follows: a chemical additive recovery device for textile fabric printing and dyeing is designed, including an air pump connected to the exhaust port of a dyeing machine, the output end of the air pump is connected to a cooler, the output end of the cooler is connected to a multi-stage recovery system, the multi-stage recovery system includes a plurality of chemical additive recovery lines and a chemical additive replenishing tank; the chemical additive recovery line includes a recovery tank, the recovery tank has an infusion inlet, an evaporation outlet and a solvent outlet; wherein the infusion inlets of two adjacent chemical additive recovery lines are connected to the solvent outlet; and the output end of the evaporation outlet is connected to a condenser, the output end of the condenser is connected to a liquid storage tank, the output end of the liquid storage tank is connected to the liquid replenishing port of the dyeing machine through a liquid return pipe, the chemical additive replenishing tank is connected to the input end of the liquid storage tank through a liquid replenishing pipe, and a liquid return pump is arranged on the liquid replenishing pipe; a gas-liquid separation mechanism and a heater are arranged from top to bottom in the recovery tank.

[0006] The present invention utilizes the different boiling points of chemical additives to raise the temperature in turn to evaporate different chemical additives, thereby recovering the chemical additives in the exhaust gas of the dyeing machine, and then returning the recovered chemical additives to the dyeing machine for reuse through concentration detection and liquid replenishment. Compared with the recovery method of the prior art, the present invention not only fully recovers and avoids the problem of safety risks caused by the spillage of chemical additives in the exhaust gas during the printing and dyeing of textile fabrics, but also saves energy and is environmentally friendly.

[0007] Preferably, the heating temperatures of the heaters of the plurality of chemical additive recovery lines are gradually increased.

[0008] Preferably, a concentration detector is arranged in the liquid storage tank.

[0009] Preferably, the infusion inlet is arranged at the top of the recovery tank, the evaporation outlet is arranged at the upper part of the recovery tank, and the solvent outlet is arranged at the bottom of the recovery tank.

[0010] Preferably, the recovery tank is divided into an upper chamber A and a lower chamber B by a transverse partition, the infusion inlet and the evaporation outlet are both connected to the chamber A, the chamber B is divided into two evaporation chambers of equal size by a longitudinal partition, the solvent outlet is arranged at the bottom of the evaporation chamber, and is connected to the adjacent solvent outlet through a liquid conduit with a circulation pump.

[0011] Preferably, the heater has two heating units, and the two heating units are respectively arranged in two evaporation chambers.

[0012] The present invention adopts a continuous evaporation method to recover chemical additives, so that the dyeing machine can continuously extract waste gas without stopping the machine, liquefy the waste gas through a cooler, and circulate the waste gas through two gas-liquid separation mechanisms. In combination with the temperature heating of the heater, the liquefied waste gas can continuously heat low-boiling-point chemical additives in two evaporation chambers, so that the low-boiling-point chemical additives are vaporized, while the high-boiling-point chemical additives are passed to the next-level chemical additive recovery line, until the various chemical additives in the printing and dyeing waste gas are relatively separated, and a higher recovery state is achieved.

[0013] Preferably, the gas-liquid separation mechanism is arranged on the transverse partition, including a mounting seat embedded in the transverse partition, a flow channel connecting chamber A and chamber B is opened inside the mounting seat, and a ball seat is arranged in the flow channel; wherein the gap between the outer surface of the ball seat and the inner wall of the flow channel constitutes a liquid guiding cavity; and the ball seat includes a spherical limiting portion and a liquid reflux blocking portion from top to bottom, a plurality of centrifugal blades in contact with the inner wall of the flow channel are arranged on the outer surface of the spherical limiting portion, and the liquid reflux blocking portion extends out of the flow channel to extend into the evaporation chamber.

[0014] Preferably, the interior of the ball seat is a through structure with an air guide cavity, a shaft sleeve is fixedly connected to the air guide cavity, a push rod is movably arranged in the shaft sleeve, an annular curved groove connected head to tail is provided at the lower part of the push rod, the annular curved groove is slidably connected to a guide column passed through the shaft sleeve, the upper part of the push rod extends into chamber A and is connected to an end cover, the end cover is in movably contact with the mounting seat, and is used to control the opening and closing of the flow channel; wherein a square rod for limiting the rotation of the end cover (1308) is inserted into the end cover.

[0015] Preferably, the bottom of the sleeve is connected to an impeller via a shaft, the horizontal height of the impeller is higher than the horizontal height of the heating unit, and an overflow port higher than the horizontal height of the impeller is opened on the longitudinal partition.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention utilizes the different boiling points of chemical additives to raise the temperature in turn to evaporate different chemical additives, thereby recovering the chemical additives in the exhaust gas of the dyeing machine, and then returning the recovered chemical additives to the dyeing machine for reuse through concentration detection and liquid replenishment. Compared with the recovery method of the prior art, the present invention not only fully recovers, but also avoids the safety risk of chemical additives escaping in the exhaust gas during the printing and dyeing of textile fabrics, and is energy-saving and environmentally friendly.

[0018] 2. The present invention adopts a continuous evaporation method to recover chemical additives, so that the dyeing machine can continuously extract waste gas without stopping, liquefy the waste gas through a cooler, and circulate through two gas-liquid separation mechanisms. In combination with the temperature heating of the heater, the liquefied waste gas can continuously heat low-boiling-point chemical additives in two evaporation chambers, so that the low-boiling-point chemical additives are vaporized, while the high-boiling-point chemical additives are passed to the next-level chemical additive recovery line, until the various chemical additives in the printing and dyeing waste gas are relatively separated and a higher recovery state is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the recovery device system of the present invention;

[0020] Figure 2 This is a schematic diagram of the recovery tank and the connection structure thereon in the present invention;

[0021] Figure 3 This is a schematic diagram of the recovery tank and its internal connection structure in the present invention;

[0022] Figure 4 This is a schematic diagram of the internal working state of the recovery tank in the present invention;

[0023] Figure 5 It is a half-section structural schematic diagram of the gas-liquid separation mechanism in the present invention;

[0024] Figure 6 It is a schematic diagram of the cross section of the ball seat and its connection structure in the present invention;

[0025] Figure 7 It is a structural schematic diagram of a quarter section of the ball seat in the present invention;

[0026] In the figure: 1. dyeing machine; 2. vacuum pump; 3. cooler; 4. multi-stage recovery system; 5. chemical additive recovery line; 6. chemical additive replenishing tank; 7. recovery tank; 8. condenser; 9. liquid storage tank; 10. liquid return pipeline; 11. liquid replenishing pipeline; 12. liquid return pump; 13. gas-liquid separation mechanism; 14. heater; 15. concentration detector; 16. transverse partition; 17. longitudinal partition; 18. liquid guide pipeline; 19. overflow port;

[0027] 701, infusion inlet; 702, evaporation outlet; 703, solvent outlet;

[0028] 1301, mounting seat; 1302, ball seat; 1303, centrifugal blade; 1304, shaft sleeve; 1305, ejector rod; 1306, annular curved groove; 1307, guide column; 1308, end cover; 1309, impeller;

[0029] 1302a, ball limiting portion; 1302b, liquid reflux blocking portion. DETAILED DESCRIPTION

[0030] Below is the attached figure Figures 1 to 7 The present invention is further described with examples:

[0031] Embodiment: A chemical additive recovery device for textile fabric printing and dyeing, such as Figure 1 As shown, it includes an air pump 2 connected to the exhaust port of the dyeing machine 1, the output end of the air pump 2 is connected to a cooler 3, and the output end of the cooler 3 is connected to a multi-stage recovery system 4; specifically, the multi-stage recovery system 4 includes a plurality of chemical additive recovery lines 5 and chemical additive replenishing tanks 6, wherein the chemical additive recovery line 5 can be adjusted according to the amount of chemical additives to be recovered; specifically, the chemical additive recovery line 5 includes a recovery tank 7, wherein, as shown Figure 2As shown, the recovery tank 7 has an infusion inlet 701, an evaporation outlet 702 and a solvent outlet 703, and the infusion inlet 701 of two adjacent chemical additive recovery lines 5 is connected to the solvent outlet 703; and, the output end of the evaporation outlet 702 is connected to a condenser 8, and the output end of the condenser 8 is connected to a liquid storage tank 9, and the output end of the liquid storage tank 9 is connected to the liquid replenishing port of the dyeing machine 1 through a return liquid pipeline 10, and the chemical additive replenishing tank 6 is connected to the input end of the liquid storage tank 9 through a liquid replenishing pipeline 11, and a liquid return pump 12 is arranged on the liquid replenishing pipeline 11. It is worth noting that a concentration detector 15 is arranged in the liquid storage tank 9; it is worth noting that the heating temperature of the heaters 14 of several chemical additive recovery lines 5 is gradually increased, and the different boiling points of the chemical additives can be utilized to increase the temperature in turn to evaporate different chemical additives, thereby achieving the purpose of recovery. The present invention utilizes the different boiling points of various chemical additives to raise the temperature in turn to evaporate different chemical additives, thereby recovering the chemical additives in the exhaust gas of the dyeing machine 1, and then returning the recovered chemical additives to the dyeing machine 1 for reuse through concentration detection and liquid replenishment. Compared with the recovery method of the prior art, the present invention not only fully recovers, but also avoids the problem of safety risks caused by the spillage of chemical additives in the exhaust gas during the printing and dyeing of textile fabrics, and is energy-saving and environmentally friendly.

[0032] like Figure 3 and Figure 4 As shown, the recovery tank 7 is provided with a gas-liquid separation mechanism 13 and a heater 14 from top to bottom. Specifically, the liquid inlet 701 is arranged at the top of the recovery tank 7, the evaporation outlet 702 is arranged at the upper part of the recovery tank 7, and the solvent outlet 703 is arranged at the bottom of the recovery tank 7. Figure 3As shown, in order to facilitate understanding of how the recovery tank 7 continuously evaporates and recovers the chemical additives, the present invention also discloses a more specific implementation structure inside the recovery tank 7. The recovery tank 7 is divided into an upper chamber A and a lower chamber B by a transverse partition 16. The infusion inlet 701 and the evaporation outlet 702 are both connected to chamber A. The chamber B is divided into two evaporation chambers of equal size by a longitudinal partition 17. It is worth mentioning that the longitudinal partition 17 in the present invention divides the chamber B equally in the shape of a Tai Chi diagram, so that the evaporation chamber has a large head end, which is conducive to providing installation space for the installation of the gas-liquid separation mechanism 13, and the body is rounded, which is conducive to pressure resistance; the solvent outlet 703 is arranged at the bottom of the evaporation chamber, and is connected to the adjacent solvent outlet 703 through a liquid guide pipe 18 with a circulation pump. It is worth mentioning that the heater 14 has two heating units, and the two heating units are respectively arranged in the two evaporation chambers. Among them, there are two gas-liquid separation mechanisms 13, which are respectively arranged on the transverse partition 16. The present invention uses a continuous evaporation method to recover chemical additives, so that the dyeing machine 1 can continuously extract waste gas without stopping the machine, liquefy the waste gas through the cooler 3, and circulate the two gas-liquid separation mechanisms 13. In combination with the temperature heating of the heater 14, the liquefied waste gas can continuously heat the low-boiling-point chemical additives in the two evaporation chambers, so that the low-boiling-point chemical additives are vaporized, while the high-boiling-point chemical additives are passed to the next-level chemical additive recovery line 5, until the various chemical additives in the printing and dyeing waste gas are relatively separated and a higher recovery state is achieved.

[0033] As a preferred implementation mode, Figure 5 and Figure 7As shown, the gas-liquid separation mechanism 13 includes a mounting seat 1301 embedded on the transverse partition 16, and a flow channel connecting chamber A and chamber B is opened inside the mounting seat 1301, and a ball seat 1302 is arranged in the flow channel; wherein, the gap between the outer surface of the ball seat 1302 and the inner wall of the flow channel constitutes a liquid guiding cavity; and the ball seat 1302 includes a spherical limiting portion 1302a and a liquid reflux blocking portion 1302b from top to bottom, the spherical limiting portion 1302a is used to limit the ball seat 1302 from falling out of the mounting seat 1301 under the action of gravity, and a plurality of centrifugal blades 1303 in contact with the inner wall of the flow channel are arranged on the outer surface of the spherical limiting portion 1302a, and the liquid reflux blocking portion 1302b extends out of the flow channel to extend into the evaporation chamber. Specifically, the interior of the ball seat 1302 is a through structure with an air guide cavity. It is worth mentioning that the liquid reflux blocking portion 1302b is used to prevent the liquefied waste gas left in the liquid guide cavity from being sucked out of the evaporation cavity by the negative pressure of the airflow in the air guide cavity; a shaft sleeve 1304 is fixedly connected to the air guide cavity, and a push rod 1305 is movably arranged in the shaft sleeve 1304. An annular curved groove 1306 connected head to tail is opened at the lower part of the push rod 1305. The annular curved groove 1306 is slidably connected to a guide column 1307 penetrated by the shaft sleeve 1304. The upper part of the push rod 1305 extends into the chamber A and is connected to an end cover 1308. The end cover 1308 is in movably contact with the mounting seat 1301 for controlling the opening and closing of the flow channel, wherein a square rod for limiting the rotation of the end cover 1308 is inserted into the end cover 1308. It is worth noting that the initial horizontal heights of the two end covers 1308 in the present invention are different, which is beneficial for the two end covers 1308 to reciprocate and control the opening and closing of the flow channel, thereby realizing continuous evaporation; the bottom of the sleeve 1304 is connected to the impeller 1309 through a shaft rod. In addition, the horizontal height of the impeller 1309 is higher than the horizontal height of the heating unit, and an overflow port 19 higher than the horizontal height of the impeller 1309 is opened on the longitudinal partition 17.Working principle: The present invention forms a liquid guide cavity through the clearance between the ball seat 1302 and the flow channel, and opens a through-structured gas guide cavity in the ball seat 1302, so that the waste gas liquefied by the cooler 3 flows to one of the gas-liquid separation mechanisms 13 after entering the chamber A through the infusion inlet 701. In the initial evaporation stage, it can flow from the liquid guide cavity or the gas guide cavity to the evaporation cavity. At this time, the heating unit starts to heat the liquefied waste gas. When the liquid level in one of the evaporation cavities rises and submerges the impeller 1309, as the heat is transferred, the low-boiling-point chemical additives are vaporized and bubbles are generated in the liquid. The bubbles float up and contact the impeller 1309. The liquid exhaust gas is mainly left in the liquid guide cavity. In this process, under the action of the inclined surface extrusion force, the amount of bubbles increases and floats up, pushing the impeller 1309 to rotate, so that the ball seat 1302 fixedly connected to the impeller 1309 rotates with it. At the same time, the guide column 1307 follows the rotation of the ball seat 1302, and under the action of the inclined surface extrusion force, the amount of bubbles increases and floats up, pushing the impeller 1309 to rotate, so that the ball seat 1302 fixedly connected to the impeller 1309 rotates with it. At the same time, the guide column 1307 follows the rotation of the ball seat 1302, and under the action of the inclined surface extrusion force, the impeller 1309 rotates with it. The annular curved groove 1306 is squeezed under the action of the annular curved groove 1306. Since the annular curved groove is connected from end to end, the push rod 1305 can be forced to rise and fall reciprocatingly in the shaft sleeve 1304, so as to achieve the effect of the end cover 1308 reciprocatingly controlling the opening and closing of the flow channel; the above-mentioned liquefied waste gas is continuously input into the evaporation chamber, and the low-boiling point chemical additives in the evaporation chamber are continuously vaporized. This part of the low-boiling point chemical additives is a small part relative to the components of the liquefied waste gas, so the liquid level in the evaporation chamber is still rising, until it flows into the evaporation chamber on the other side from the overflow port 19 to continue evaporation, and the liquid inlet and exhaust in the evaporation chamber are consistent with the previous ones, and when the liquid level reaches the level of submerging the leaves of the chamber After the wheel 1309, the end cover 1308 at the upper end of the chamber also begins to reciprocate and control the opening and closing of the flow channel. When the end cover 1308 rises, the flow rate of the liquefied waste gas is increased. When the end cover 1308 falls, the pressure in the evaporation chamber is increased, which promotes the rapid evaporation of low-boiling-point chemical additives. Until the evaporation reaction of the liquid in the evaporation chamber is not violent or slow, the liquid guide pipe 18, under the suction action of the circulation pump, extracts the remaining high-boiling-point liquid and sends it to the next-level high-temperature (relatively speaking) chemical additive recovery line 5, and repeats the above evaporation work. This continuous cycle evaporation method can avoid the shutdown of the dyeing machine 1 and improve the recovery efficiency of the chemical additives.

[0034] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A chemical additive recovery device for textile fabric printing and dyeing, comprising an air pump (2) connected to an exhaust port of a dyeing machine (1), wherein an output end of the air pump (2) is connected to a cooler (3), characterized in that: The output end of the cooler (3) is connected to a multi-stage recovery system (4), and the multi-stage recovery system (4) includes a plurality of chemical auxiliary agent recovery lines (5) and a chemical auxiliary agent replenishment tank (6); The chemical auxiliary agent recovery line (5) comprises a recovery tank (7), wherein the recovery tank (7) has an infusion inlet (701), an evaporation outlet (702) and a solvent outlet (703); The infusion inlet (701) and the solvent outlet (703) of two adjacent chemical auxiliary agent recovery lines (5) are connected; Furthermore, the output end of the evaporation outlet (702) is connected to a condenser (8), the output end of the condenser (8) is connected to a liquid storage tank (9), the output end of the liquid storage tank (9) is connected to a liquid replenishing port of the dyeing machine (1) via a liquid return pipe (10), the chemical auxiliary agent replenishing tank (6) is connected to the input end of the liquid storage tank (9) via a liquid replenishing pipe (11), and a liquid return pump (12) is arranged on the liquid replenishing pipe (11); The recovery tank (7) is provided with a gas-liquid separation mechanism (13) and a heater (14) from top to bottom. The heating temperature of the heaters (14) of the plurality of chemical additive recovery lines (5) is gradually increased; The infusion inlet (701) is arranged at the top of the recovery tank (7), the evaporation outlet (702) is arranged at the upper part of the recovery tank (7), and the solvent outlet (703) is arranged at the bottom of the recovery tank (7); The recovery tank (7) is divided into an upper chamber A and a lower chamber B by a transverse partition (16); the infusion inlet (701) and the evaporation outlet (702) are both connected to the chamber A; the chamber B is divided into two evaporation chambers of equal size by a longitudinal partition (17); the solvent outlet (703) is arranged at the bottom of the evaporation chamber and is connected to an adjacent solvent outlet (703) via a liquid guide pipe (18) having a circulation pump; The heater (14) has two heating units, and the two heating units are respectively arranged in the two evaporation chambers; The gas-liquid separation mechanism (13) is arranged on the transverse partition (16), and comprises a mounting seat (1301) embedded in the transverse partition (16); a flow channel connecting chamber A and chamber B is provided inside the mounting seat (1301); a ball seat (1302) is arranged inside the flow channel; wherein a gap between the outer surface of the ball seat (1302) and the inner wall of the flow channel forms a liquid guide cavity; and the ball seat (1302) comprises a spherical limiting portion (1302a) and a liquid reflux blocking portion (1302b) from top to bottom; a plurality of centrifugal blades (1303) in contact with the inner wall of the flow channel are arranged on the outer surface of the spherical limiting portion (1302a); the liquid reflux blocking portion (1302b) extends out of the flow channel and extends into the evaporation chamber; the ball seat (1302) is provided with a gas guide cavity in a through structure; a shaft sleeve (1304) is fixedly connected to the gas guide cavity; the shaft sleeve (1304) is fixedly connected to the inner wall of the flow channel ... A push rod (1305) is movably arranged in the sleeve (1304); a circular curved groove (1306) communicating head to tail is provided at the lower part of the push rod (1305); the circular curved groove (1306) is slidably connected to a guide column (1307) passing through the sleeve (1304); the upper part of the push rod (1305) extends into the chamber A and is connected to an end cover (1308); the end cover (1308) is in movably contact with the mounting seat (1301) for controlling the opening and closing of the flow channel; wherein a square rod for limiting the rotation of the end cover (1308) is inserted into the end cover (1308); an impeller (1309) is connected to the bottom of the sleeve (1304) via a shaft; the horizontal height of the impeller (1309) is higher than the horizontal height of the heating unit; and an overflow port (19) is provided on the longitudinal partition plate (17) at a height higher than the horizontal height of the impeller (1309).

2. The chemical additive recovery device for textile fabric printing and dyeing as claimed in claim 1, characterized in that: A concentration detector (15) is arranged in the liquid storage tank (9).

Images