Device for separating and recovering solvent from printing and dyeing

Abstract

The device comprises an operation box used for condensation, a heating box and a recycling box are arranged on the two sides of the operation box respectively, the heating box and the recycling box are both communicated with the operation box, two sets of liquid storage barrels are installed in the operation box, and the liquid storage barrels are communicated with the heating box. A liquid changing pipe used for changing liquid is fixed to the outer side of each liquid storage cylinder, and a first spiral conveying pipe and a second spiral conveying pipe used for heat exchange are fixed into the two liquid storage cylinders correspondingly. Under the action of the through holes in the inner stirring plate, the through holes in the inner stirring plate allow steam to pass through, the steam freely flows on the two sides of the inner stirring plate through the through holes, exchange and mixing of the steam are achieved, the steam enters half of the second spiral conveying pipe, different parts of the steam make contact with the second spiral conveying pipe, the steam is more easily condensed, and the condensation efficiency is improved. And the outer stirring plate accelerates the movement of the cold source on the outer side of the contact unit, so that the cold source is more easily transferred into the connecting cylinder, and the condensation effect is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of printing and dyeing recovery, in particular to a device for separating and recovering solvent from printing and dyeing. Background Art

[0002] The printing and dyeing process is a complex and sophisticated system engineering. Pretreatment is carried out first. The purpose of pretreatment is to remove all kinds of impurities on the fabric under the condition of minimal damage to the grey fabric, so that the fabric becomes a dyeing and printing semi-finished product that is white, soft and has good wetting properties. After that, dyeing is carried out. Dyeing is the process of dyeing fiber materials with colors. It is through the physical, chemical or chemical combination of dyes and fibers, or the use of chemical methods to generate dyes on fibers to make the entire textile a colored object. In the dyeing process, the dye first diffuses to the fiber surface, and then gradually transfers from the solution to the inside of the fiber until the dye concentration in each part of the fiber tends to be consistent. Fixation is the process of dye combining with fiber, which determines the fastness and color of dyeing.

[0003] The separation and recovery of printing and dyeing solvents is an important environmental protection and energy-saving link. Patent No. CN202410246590.X proposes to use distillation for recovery. The distillation method is to evaporate the solvent into steam by heating, and then condense it into liquid, so as to achieve the separation and recovery of the solvent. This method is suitable for recovering solvents with low boiling points. During the distillation process, the heating temperature and condensation conditions need to be strictly controlled to ensure the purity and recovery rate of the solvent. However, in the process of condensing the steam into liquid, it needs to contact the cold source to condense. The steam transmitted through the pipeline is only cooled well near the pipe wall. The steam that is not completely cooled moves out with the gas, which will have an impact on the environment. Therefore, it is necessary to condense all the steam into liquid and recover the liquid. Summary of the invention

[0004] The object of the present invention is to provide a device for separating and recovering solvent from printing and dyeing to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a device for separating and recovering solvents from printing and dyeing, comprising an operating box for condensation, a heating box and a recovery box are respectively arranged on both sides of the operating box, the heating box and the recovery box are both connected to the operating box, two groups of liquid storage cylinders are installed inside the operating box, a liquid replacement pipe for liquid replacement is fixed on the outside of the liquid storage cylinder, a spiral conveying pipe 1 and a spiral conveying pipe 2 for heat exchange are respectively fixed in the two groups of liquid storage cylinders, the spiral conveying pipe 1 and the spiral conveying pipe 2 are connected, and both are connected to the recovery box and the heating box respectively;

[0006] The spiral conveying pipe 2 is supported by a support frame, and a blocking frame perpendicular to the support frame is slidably installed on the support frame. The blocking frame divides the spiral conveying pipe 2 into two halves. A contact unit for connecting the two halves of the spiral conveying pipe 2 is installed in the blocking frame, and the contact unit is used to stir the steam.

[0007] Furthermore, the spiral conveying tube 1 and the spiral conveying tube 2 both extend spirally from top to bottom, and the lower ends of the two are connected, so that the steam moves downward through the spiral conveying tube 2 and then moves upward from the spiral conveying tube 1. The interior of the spiral conveying tube 1 is closed and has multiple conveying holes distributed along the spiral for conveying the generated liquid.

[0008] Furthermore, the two halves of the spiral conveying tube 2 both pass through the support frame, and the support frame is used to limit the two halves of the spiral conveying tube 2, and the support frame is a thin sheet of metal material.

[0009] Furthermore, a plurality of connecting holes are passed through the outside of the blocking frame, and the connecting holes are used to connect the two halves of the spiral conveying pipes. A connecting cylinder is also fixed inside the blocking frame, and the axis of the connecting cylinder coincides with the axis of the connecting hole. A slit is opened in the middle of the connecting cylinder to divide the connecting cylinder into two. The slit is used to install a contact unit, and the inner and outer sides of the contact unit are respectively in contact with the connecting cylinder and the outside world, and when it rotates, both the inner and outer sides are stirred.

[0010] Furthermore, the contact unit includes an embedded layer clamped in the seam, an annular frame is integrally provided on the outer side of the embedded layer, and the annular frame is sleeved on the outer side of the connecting tube to block the seam, and a plurality of circumferentially distributed internal stirring plates are fixed on the inner wall of the embedded layer, and the internal stirring plates are used to stir the steam inside the connecting tube.

[0011] Furthermore, the inner stirring plate is a metal sheet, and a plurality of through holes are provided on the outer wall of the inner stirring plate, and the through holes are used to stir the steam.

[0012] Furthermore, external stirring plates are fixed at both ends of the annular frame, the external stirring plates are in contact with the connecting tube, and the external stirring plates are also metal sheets.

[0013] Furthermore, a gear is fixed to one end of the outer stirring plate on one side, the gear coincides with the axis of the connecting tube, a chain is meshed on the outside of the gear, a waterproof motor is installed on the outside of the blocking frame, and the output end of the waterproof motor is meshed with the chain for driving the chain transmission.

[0014] Furthermore, sealing rings are fixed on both sides of the embedded layer, and the outer sides of the sealing rings are pressed against the inner wall of the seam.

[0015] Furthermore, an air pump is fixed to the upper end of the heating box, and the air pump is used to blow air into the heating box.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0017] 1. Since the spiral conveying pipe 2 and the spiral conveying pipe 1 form a U shape as a whole, the steam will condense and be located at the lower end of the spiral conveying pipe 2 and the spiral conveying pipe 1, blocking the conveying pores, so that the spiral conveying pipe 2 and the spiral conveying pipe 1 can discharge the condensed liquid at intervals, making the steam contact the cold source for a longer time and improving the condensation efficiency.

[0018] 2. Under the action of the through holes on the inner stirring plate, the through holes on the inner stirring plate allow steam to pass through, and the steam flows freely on both sides of the inner stirring plate through the through holes, realizing the exchange and mixing of steam. The steam enters half of the spiral conveying pipe 2, and the steam in different parts contacts the spiral conveying pipe 2, making the steam easier to condense. The outer stirring plate accelerates the movement of the cold source outside the contact unit, making it easier for the cold source to be transferred to the connecting cylinder, further improving the condensation effect.

[0019] 3. The inner and outer stirring plates on both sides of the contact unit can increase the contact area to transfer heat, further improve the condensation effect, and avoid the steam moving outward to the greatest extent, causing damage to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of a half-section structure of the operating box of the present invention;

[0023] Figure 3 It is a schematic diagram of a half-section structure of a liquid storage cylinder of the present invention;

[0024] Figure 4 It is a schematic diagram of a partial structure of a spiral conveying pipe of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the second spiral conveying pipe of the present invention;

[0026] Figure 6 It is a schematic diagram of the local structure of the blocking frame of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the contact unit and the blocking frame being separated according to the present invention;

[0028] Figure 8 It is a schematic diagram of the contact unit structure of the present invention;

[0029] Fig. 9 It is a schematic diagram of the planar structure of the contact unit of the present invention.

[0030] In the figure: 1. operation box; 2. heating box; 3. recovery box; 4. liquid storage cylinder; 41. liquid exchange tube; 5. spiral conveying tube 1; 51. conveying pore; 6. spiral conveying tube 2; 7. support frame; 8. blocking frame; 81. connecting hole; 82. connecting cylinder; 83. seam; 9. contact unit; 91. annular frame; 92. embedded layer; 93. sealing ring; 94. inner stirring plate; 95. through hole; 96. outer stirring plate; 97. gear; 10. chain; 11. waterproof motor. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 9 The present invention provides a technical solution: the distillation method is to evaporate the solvent into steam by heating, and then condense it into liquid, so as to achieve separation and recovery of the solvent. The generated steam needs to be condensed during the distillation process. A device for separating and recovering solvents from printing and dyeing is proposed, including an operation box 1 for condensation, a heating box 2 and a recovery box 3 are respectively arranged on both sides of the operation box 1, the heating box 2 and the recovery box 3 are both connected to the operation box 1, the heating box 2 is heated, and then the generated steam enters the operation box 1, and the subsequent condensation is recovered by the recovery box 3, so that the recovery of the solvent is completed. Two sets of liquid storage cylinders 4 are installed inside the operation box 1, and a liquid replacement pipe for replacing liquid is fixed on the outside of the liquid storage cylinder 4 41, the liquid storage cylinder 4 is filled with brine for cooling, wherein the brine can be used as a cooling medium. The cooling effect of brine is usually better than that of pure water because it can lower the freezing point of water, thereby maintaining a liquid state at a lower temperature. The brine is replaced through the liquid replacement pipe 41 to ensure that the brine temperature in the liquid storage cylinder 4 is low, which is used to condense the steam. The two groups of liquid storage cylinders 4 are respectively fixed with a spiral conveying pipe 1 5 and a spiral conveying pipe 2 6 for heat exchange. The spiral conveying pipe 1 5 and the spiral conveying pipe 2 6 are connected, and the two are respectively connected to the recovery box 3 and the heating box 2. The spiral conveying pipe 1 5 and the spiral conveying pipe 2 6 are used to transmit the steam and condense the steam;

[0033] like Figure 5As shown, a support frame 7 is supported on the spiral conveying pipe 2 6, and a baffle frame 8 is slidably installed on the support frame 7 and is perpendicular to it. The baffle frame 8 divides the spiral conveying pipe 2 6 into two halves. A contact unit 9 for connecting the two halves of the spiral conveying pipe 2 6 is installed in the baffle frame 8. The contact unit 9 is used to stir the steam. The support frame 7 supports the two halves of the spiral conveying pipe 2 6, and the baffle frame 8 is installed with the contact unit 9. The contact unit 9 connects the two halves of the spiral conveying pipe 2 6. When transmitting steam, it needs to pass through the contact unit 9.

[0034] like Figure 3 As shown, both the spiral conveying pipe 1 5 and the spiral conveying pipe 2 6 extend spirally from top to bottom. The spiral shape allows the steam to contact the cold source over a larger area and increase the residence time in the spirally installed pipe, thereby accelerating condensation. The lower ends of the two are connected, so that the spiral conveying pipe 1 5 and the spiral conveying pipe 2 6 are U-shaped as a whole. When the steam passes through, the condensed liquid will accumulate inside the U-shape, causing the steam to move downward through the spiral conveying pipe 2 6 and then move upward from the spiral conveying pipe 1 5. The interior of the spiral conveying pipe 1 5 is closed and has a plurality of conveying holes 51 distributed along the spiral for conveying the generated liquid. The conveying holes 51 are used to convey the steam, and when the steam condenses, the generated liquid can block the conveying holes 51. When the air pressure increases, the generated liquid is pushed along the conveying holes 51.

[0035] like Figure 5 As shown, in order to install the spiral conveying pipe 26, the two halves of the spiral conveying pipe 26 pass through the support frame 7. The support frame 7 is used to limit the two halves of the spiral conveying pipe 26. The support frame 7 is a thin sheet made of metal. The thin sheet is in order to avoid increasing the range of blocking the spiral conveying pipe 26 and make the spiral conveying pipe 26 contact with the brine to the greatest extent.

[0036] like Figure 6 As shown, a plurality of connecting holes 81 are passed through the outside of the baffle frame 8, and the connecting holes 81 are used to connect the two halves of the spiral conveying pipe 26 so that steam can be transmitted through the two halves of the spiral conveying pipe 26. A connecting cylinder 82 is also fixed inside the baffle frame 8, and the axis of the connecting cylinder 82 coincides with the axis of the connecting hole 81. A slit 83 is provided in the middle of the connecting cylinder 82 to divide the connecting cylinder 82 into two parts, and the slit 83 is used to install the contact unit 9. The inner and outer sides of the contact unit 9 are in contact with the connecting cylinder 82 and the outside respectively. When the contact unit 9 rotates, the inner and outer sides are stirred so that the steam contacts the contact unit 9 when passing through the connecting cylinder 82.

[0037] like Figure 7 and Figure 8As shown, the inner and outer sides of the contact unit 9 are in contact with the steam and the brine on the outside respectively, stirring the steam while stirring the brine on the outside. The contact unit 9 includes an embedded layer 92 clamped in the slit 83, and an annular frame 91 is integrally provided on the outer side of the embedded layer 92. The annular frame 91 is sleeved on the outer side of the connecting tube 82 to block the slit 83. A plurality of circumferentially distributed inner stirring plates 94 are fixed on the inner wall of the embedded layer 92, and the inner stirring plates 94 are used to stir the steam inside the connecting tube 82.

[0038] The inner stirring plate 94 is a metal sheet, and a plurality of through holes 95 are provided on the outer wall of the inner stirring plate 94. The through holes 95 are used to stir the steam. The metal inner stirring plate 94 stirs the steam and has through holes 95 thereon, so that the steam is mixed, that is, it is easier for the steam at different positions to contact the inner wall of the spiral conveying pipe 6, thereby achieving rapid condensation.

[0039] like Figure 8 As shown, outer stirring plates 96 are fixed at both ends of the annular frame 91. The outer stirring plates 96 are in contact with the connecting tube 82. The outer stirring plates 96 are also metal sheets. The outer stirring plates 96 stir the brine on the outside to make the brine move, thereby avoiding the local brine temperature from rising and affecting the heat exchange. It should be noted that the inner stirring plates 94 and the outer stirring plates 96 can increase the contact area and are made of metal. The annular frame 91 and the embedded layer 92 are also made of metal to achieve heat transfer, which not only achieves the stirring effect, but also achieves the heat transfer effect.

[0040] like Figure 8 As shown, a gear 97 is fixed to one end of the outer stirring plate 96 on one side, and the gear 97 coincides with the axis of the connecting tube 82. A chain 10 is meshed on the outside of the gear 97. A waterproof motor 11 is installed on the outside of the blocking frame 8. The output end of the waterproof motor 11 is meshed with the chain 10 to drive the chain 10 to transmit. Under the action of the waterproof motor 11, the contact units 9 at different positions are all rotated.

[0041] like Figure 8 As shown, in order to prevent steam from leaking out, sealing rings 93 are fixed on both sides of the embedded layer 92 , and the outer side of the sealing ring 93 is pressed against the inner wall of the slit 83 .

[0042] like Figure 1 As shown, an air pump is fixed at the upper end of the heating box 2, and the air pump is used to blow air into the heating box 2. When the generated steam is difficult to push the liquid in the spiral conveying tube 2 6 and the spiral conveying tube 1 5, the air pressure can be increased by the air pump to push the generated liquid into the recovery box 3.

[0043] The working principle of the present invention is as follows: the printing and dyeing solution is placed in the heating box 2, which can heat the solution, and then the condensed liquid is placed in the recovery box 3 through the condensation effect of the operation box 1, thereby completing the recovery of the solvent.

[0044] The steam generated by heating moves to the spiral conveying tube 2 6, condenses into liquid after contacting the cold source, and is discharged from the spiral conveying tube 1 5 into the recovery box 3. Since the spiral conveying tube 2 6 and the spiral conveying tube 1 5 form a U shape as a whole, the steam moving into the spiral conveying tube 2 6 will condense and be located at the lower end of the spiral conveying tube 2 6 and the spiral conveying tube 1 5. As the liquid gradually increases, the conveying pores 51 of the spiral conveying tube 1 5 will be blocked, so that the steam cannot move outward. At this time, more steam will remain between the spiral conveying tube 2 6 and the spiral conveying tube 1 5, and then the steam will be in contact with the cold source for a longer time, and the condensation effect will be best. In addition, as the steam gradually increases, the condensed liquid will be pushed along the conveying pores 51, so that the liquid is discharged into the recovery box 3. The subsequent condensed liquid will gradually accumulate, so that the spiral conveying tube 2 6 and the spiral conveying tube 1 5 can discharge the condensed liquid at intervals, so that the steam can be in contact with the cold source for a longer time, thereby improving the condensation efficiency.

[0045] Secondly, when the waterproof motor 11 is working, the drive chain 10 rotates, causing the contact unit 9 to rotate, and the inner stirring plate 94 to rotate. Under the action of the through holes 95 on the inner stirring plate 94, the through holes 95 on the inner stirring plate 94 allow steam to pass through. This is the basis for the circulation of steam during the stirring process. The steam flows freely on both sides of the inner stirring plate 94 through the through holes 95, realizing the exchange and mixing of steam. After the steam is stirred, the steam enters half of the spiral conveying pipe 26, and different parts of the steam contact the spiral conveying pipe 26, making the steam easier to condense.

[0046] The outer stirring plate 96 can also rotate to accelerate the movement of the cold source outside the contact unit 9, making it easier for the cold source to be transferred to the connecting tube 82, further improving the condensation effect.

[0047] It should be noted that the inner stirring plate 94 and the outer stirring plate 96 on the inner and outer sides of the contact unit 9 can increase the contact area, can be used to transfer heat, can quickly cool the temperature of the steam, further improve the condensation effect, and avoid the steam from moving outward to the greatest extent, causing damage to the environment.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for separating and recovering solvent from printing and dyeing, comprising an operating box (1) for condensation, a heating box (2) and a recovery box (3) are respectively arranged on both sides of the operating box (1), and the heating box (2) and the recovery box (3) are both connected to the operating box (1), characterized in that: Two groups of liquid storage cylinders (4) are installed inside the operation box (1), and a liquid replacement pipe (41) for replacing liquid is fixed on the outside of the liquid storage cylinders (4). A spiral conveying pipe 1 (5) and a spiral conveying pipe 2 (6) for heat exchange are respectively fixed inside the two groups of liquid storage cylinders (4), and the spiral conveying pipe 1 (5) and the spiral conveying pipe 2 (6) are connected, and the two are respectively connected to the recovery box (3) and the heating box (2); The spiral conveying pipe (6) is supported by a support frame (7), and a blocking frame (8) is slidably mounted on the support frame (7) and is perpendicular to the support frame. The blocking frame (8) divides the spiral conveying pipe (6) into two halves. A contact unit (9) for connecting the two halves of the spiral conveying pipe (6) is mounted in the blocking frame (8), and the contact unit (9) is used to stir the steam.

2. The device for separating and recovering solvent from printing and dyeing according to claim 1, characterized in that: The spiral conveying pipe 1 (5) and the spiral conveying pipe 2 (6) both extend spirally from top to bottom, and the lower ends of the two are connected, so that the steam moves downward through the spiral conveying pipe 2 (6) and then moves upward from the spiral conveying pipe 1 (5). The interior of the spiral conveying pipe 1 (5) is closed, and a plurality of conveying fine holes (51) distributed along the spiral are provided inside the spiral conveying pipe for conveying the generated liquid.

3. The device for separating and recovering solvent from printing and dyeing according to claim 1, characterized in that: The two halves of the spiral conveying pipe 2 (6) both pass through the support frame (7), and the support frame (7) is used to limit the two halves of the spiral conveying pipe 2 (6). The support frame (7) is a thin sheet made of metal material.

4. The device for separating and recovering solvent from printing and dyeing according to claim 1, characterized in that: A plurality of connection holes (81) are formed through the outside of the blocking frame (8), and the connection holes (81) are used to connect the two halves of the spiral conveying pipe (6). A connection tube (82) is also fixed inside the blocking frame (8), and the axis of the connection tube (82) coincides with the axis of the connection hole (81). A slit (83) is formed in the middle of the connection tube (82) to divide the connection tube (82) into two parts. The contact unit (9) is installed in the slit (83). The inner and outer sides of the contact unit (9) are in contact with the connection tube (82) and the outside respectively, and when the contact unit (9) rotates, both the inner and outer sides are stirred.

5. The device for separating and recovering solvent from printing and dyeing according to claim 4, characterized in that: The contact unit (9) comprises an embedded layer (92) clamped in the slit (83); an annular frame (91) is integrally provided on the outer side of the embedded layer (92); the annular frame (91) is sleeved on the outer side of the connecting tube (82) and is used to block the slit (83); a plurality of circumferentially distributed inner stirring plates (94) are fixed on the inner wall of the embedded layer (92); the inner stirring plates (94) are used to stir the steam inside the connecting tube (82).

6. The device for separating and recovering solvent from printing and dyeing according to claim 5, characterized in that: The inner stirring plate (94) is a metal sheet. A plurality of through holes (95) are provided on the outer wall of the inner stirring plate (94). The through holes (95) are used to stir the steam.

7. The device for separating and recovering solvent from printing and dyeing according to claim 5, characterized in that: External stirring plates (96) are fixed at both ends of the annular frame (91), and the external stirring plates (96) are in contact with the connecting tube (82). The external stirring plates (96) are also metal sheets.

8. The device for separating and recovering solvent from printing and dyeing according to claim 7, characterized in that: A gear (97) is fixed to one end of the outer stirring plate (96) on one side, the gear (97) coincides with the axis of the connecting tube (82), a chain (10) is meshed on the outer side of the gear (97), a waterproof motor (11) is installed on the outer side of the blocking frame (8), and the output end of the waterproof motor (11) is meshed with the chain (10) for driving the chain (10) to transmit.

9. The device for separating and recovering solvent from printing and dyeing according to claim 5, characterized in that: Sealing rings (93) are fixed on both sides of the embedding layer (92), and the outer side of the sealing ring (93) is pressed against the inner wall of the seam opening (83).

10. The device for separating and recovering solvent from printing and dyeing according to claim 1, characterized in that: An air pump is fixed to the upper end of the heating box (2), and the air pump is used to blow air into the heating box (2).

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