Balanced recycling device for light alkali

Abstract

The utility model belongs to the technical field of printing and dyeing light alkali recycling devices, and particularly relates to a light alkali balance recycling device. The light alkali balancing and recycling device comprises a sewage station alkali balancing device, a second printing and dyeing plant alkali storage tank, a first printing and dyeing plant alkali storage tank, a mixed conditioning tank A, a standard alkali tank A, a mixed conditioning tank B and a standard alkali tank B, a first printing and dyeing plant alkali storage tank is connected with an automatic feeding control cabinet A, a concentration online monitoring device A, a mixing conditioning tank A, a standard alkali tank A, a desizing and alkali adding tank A and a first printing and dyeing plant desizing, scouring and bleaching combination machine; the second printing and dyeing plant alkali storage tank is connected with the automatic feeding control cabinet B. The concentration online monitoring device B, the mixing conditioning tank B, the standard alkali tank B and the desizing, scouring and alkali adding tank B are connected with the second printing and dyeing plant desizing, scouring and bleaching combination machine. According to the light alkali balancing and recycling device provided by the utility model, the alkali storage tank of the second printing and dyeing plant is communicated with the alkali storage tank of the first printing and dyeing plant, and the generated light alkali is simultaneously used for communicating the alkali balancing device of the sewage station with the standard alkali tank, so that the utilization rate is high, the investment is reduced, and the income is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of a printing and dyeing diluted alkali recycling device, in particular to a diluted alkali balanced recycling device. Background Art

[0002] The low-concentration alkali produced in the dyeing and finishing workshop is recovered by evaporation through multi-effect expansion evaporation or MVR alkali recovery equipment, and the high-concentration recovered alkali is reused in other alkali-using processes such as mercerizing. The operation of the alkali recovery equipment consumes a large amount of steam, electricity and other resources, and the medium-temperature cooling water produced by some equipment cannot be fully utilized. Under the process conditions where alkali oxygen is mainly used before dyeing and finishing, a large amount of high-concentration recovered alkali or raw alkali is compounded with water to form a lower concentration of standard alkali. The sewage station still needs to use a large amount of raw alkali in the physical and chemical stage after using the acidic water purifier and the stage of treating acidic waste gas. As a result, a large amount of alkali is seriously wasted in the entire dyeing and finishing process, a large amount of steam and electricity resources are consumed, energy consumption is high, and efficiency is low.

[0003] CN219300520U discloses a balancing device for alkali and produced alkali in sewage stations and dyeing and finishing workshops. The alkali recovery in the integrated printing and dyeing park is balanced with the sewage station. The sewage station uses waste alkali liquid to replace fresh concentrated alkali, which greatly reduces the use of fresh raw alkali in the sewage station. After ensuring the demand for alkali in the sewage station, the remaining alkali still needs to be evaporated and reused through a multi-effect evaporation device. The traditional multi-effect evaporation equipment consumes a lot of energy for evaporating alkali, and produces a large amount of medium-temperature cooling water at the same time, which has a high reuse pressure and a low comprehensive operating income. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the above-mentioned defects of the prior art and provide a dilute alkali balance recycling device, which connects the alkali storage tank of the second printing and dyeing plant with the alkali storage tank of the first printing and dyeing plant. The dilute alkali produced by the device is used to connect the alkali balance device of the sewage station with the standard alkali tank, with high utilization rate, reduced investment and increased benefits.

[0005] The utility model discloses a balanced recycling device for desalinated alkali, comprising an alkali balancing device for a sewage station, an alkali storage tank for a printing and dyeing plant No. 2, an alkali storage tank for a printing and dyeing plant No. 1, a mixing conditioning tank A, a standard alkali tank A, a mixing conditioning tank B, and a standard alkali tank B. The alkali storage tank for a printing and dyeing plant No. 1 is connected to a delivery pump B, the delivery pump B is connected to an automatic feeding control cabinet A, the automatic feeding control cabinet A is connected to an online concentration monitoring device A, the online concentration monitoring device A is connected to a mixing conditioning tank A, the mixing conditioning tank A is connected to a standard alkali tank A, the standard alkali tank A is connected to a de-boiling and alkali adding tank A, and the de-boiling and adding tank B is connected to the mixing conditioning tank A. Alkali tank A is connected to the de-boiling and bleaching machine of the first printing and dyeing plant; the alkali storage tank of the first printing and dyeing plant is connected to the alkali storage tank of the second printing and dyeing plant, the alkali storage tank of the second printing and dyeing plant is connected to the delivery pump e, the delivery pump e is connected to the automatic feeding control cabinet B, the automatic feeding control cabinet B is connected to the concentration online monitoring device B, the concentration online monitoring device B is connected to the mixing and conditioning tank B, the mixing and conditioning tank B is connected to the standard alkali tank B, the standard alkali tank B is connected to the de-boiling and alkali adding tank B, the de-boiling and alkali adding tank B is connected to the de-boiling and bleaching machine of the second printing and dyeing plant; the alkali storage tank of the second printing and dyeing plant is connected to the alkali balance device of the sewage station. The concentration online monitoring device A is an online refractometer concentration detector.

[0006] Preferably, the alkali storage tank of the printing and dyeing plant 1 is connected to the delivery pump a, the delivery pump a is connected to the alkali storage tank of the printing and dyeing plant 2 through a connecting pipe, the alkali storage tank of the printing and dyeing plant 2 is connected to the delivery pump h, the delivery pump h is connected to the flow meter, and the flow meter is connected to the alkali balance device of the sewage station.

[0007] Preferably, a delivery pump c is provided between the mixing and conditioning tank A and the standard alkali tank A, and a delivery pump d is provided between the standard alkali tank A and the deboiling and alkali adding tank A.

[0008] Preferably, a delivery pump f is provided between the mixing and conditioning tank B and the standard alkali tank B, and a delivery pump g is provided between the standard alkali tank B and the deboiling and alkali adding tank B.

[0009] Preferably, the alkali storage tank of the first printing and dyeing plant is provided with a liquid level gauge a, the mixing and conditioning tank A is provided with a liquid level gauge c, the standard alkali tank A is provided with a liquid level gauge d, and the deboiling and alkali adding tank A is provided with a liquid level gauge e.

[0010] Preferably, the alkali storage tank of the second printing and dyeing plant is provided with a liquid level gauge f, the mixing and conditioning tank B is provided with a liquid level gauge h, the standard alkali tank B is provided with a liquid level gauge i, and the deboiling and alkali adding tank B is provided with a liquid level gauge j.

[0011] Preferably, the inlet of the delivery pump b is connected to the raw alkali tank of the printing and dyeing plant No. 1, and a liquid level meter b is provided on the raw alkali tank of the printing and dyeing plant No. 1.

[0012] Preferably, the inlet of the delivery pump e is connected to the raw alkali tank of the second printing and dyeing factory, and a liquid level meter g is provided on the raw alkali tank of the second printing and dyeing factory.

[0013] Specifically, the described balanced recycling device for diluted alkali, when working, based on the existing technology, the alkali storage tank of the printing and dyeing plant is adjusted by the automatic feeding control cabinet A and the concentration online monitoring device A, and the original alkali tank of the printing and dyeing plant is adjusted, and the alkali is continuously added to the mixing and conditioning tank A according to the corresponding basic concentration ratio of the original alkali and diluted alkali. To ensure the cleanliness of the alkali solution, after the alkali solution in the mixing and conditioning tank A is stirred and mixed, the concentration online monitoring device A detects the initial alkali concentration, and the automatic feeding control cabinet A controls the start of the diluted alkali and original alkali mixing control valves according to the actual concentration detected by the concentration online monitoring device A and the set standard concentration. When the conditioning and mixing reaches the standard concentration range, it is injected into the standard alkali tank A through the connecting pipeline, and the standard alkali tank A controls the high and low liquid levels through the liquid level meter d to control the start of the mixed alkali preparation process. The quasi-alkali tank A is connected with the de-boiling and alkali adding tank A to supply the de-boiling and bleaching combined machine of the printing and dyeing plant.

[0014] The alkali storage tank of the Printing and Dyeing Plant No. 2 is regulated by the automatic feeding control cabinet B and the concentration online monitoring device B. Through the adjustment with the original alkali tank of the Printing and Dyeing Plant No. 2, alkali is continuously added to the mixing conditioning tank B according to the corresponding basic concentration ratio of original alkali and light alkali. To ensure the cleanliness of the alkali solution, the alkali solution in the mixing conditioning tank B is stirred and mixed, and the concentration online monitoring device B detects the initial alkali concentration. The automatic feeding control cabinet B controls the actuation of the light alkali and original alkali mixing control valves according to the actual concentration detected by the online monitoring device B and the set standard concentration. When the conditioning mixture reaches the standard concentration range, it is connected to the standard alkali tank B through the connecting pipeline. The standard alkali tank B is connected to the deboiling and bleaching tank B to supply the deboiling and bleaching combined machine of the Printing and Dyeing Plant No. 2.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model discloses a device for recycling alkali balance, which not only supplies all the alkali used in the sewage station under the alkali balance device of the sewage station, but also connects the alkali storage tank of the second printing and dyeing plant with the alkali storage tank of the first printing and dyeing plant, respectively sets a mixing conditioning tank, an online concentration monitoring device and a standard alkali tank, pumps the alkali into the de-boiling and alkali adding tank, and supplies the alkali used in the de-boiling and bleaching combined machine, so that the alkali used in the whole dyeing and finishing process can be switched freely and adjusted in an orderly manner, thereby reducing the investment in alkali, saving the operating cost of the alkali recovery equipment and improving the comprehensive benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the dilute alkali balance recycling device of the utility model;

[0018] In the figure: 1. Alkali balance device of sewage station; 2. Alkali storage tank of printing and dyeing plant No. 2; 3. Alkali storage tank of printing and dyeing plant No. 1; 4. Liquid level gauge a; 5. Delivery pump a; 6. Connecting pipe; 7. Raw alkali tank of printing and dyeing plant No. 1; 8. Liquid level gauge b; 9. Delivery pump b; 10. Automatic feeding control cabinet A; 11. Concentration online monitoring device A; 12. Mixing and conditioning tank A; 13. Liquid level gauge c; 14. Delivery pump c; 15. Standard alkali tank A; 16. Liquid level gauge d; 17. Delivery pump d; 18. De-boiling and alkali adding tank A; 19. Liquid level gauge e; 20. De-boiling, boiling and bleaching machine of the first printing and dyeing plant; 21. Liquid level meter f; 22. Delivery pump e; 23. Raw alkali tank of the second printing and dyeing plant; 24. Liquid level meter g; 25. Automatic feeding control cabinet B; 26. Online concentration monitoring device B; 27. Mixing and conditioning tank B; 28. Liquid level meter h; 29. ​​Delivery pump f; 30. Standard alkali tank B; 31. Liquid level meter i; 32. Delivery pump g; 33. De-boiling, boiling and alkali adding tank B; 34. De-boiling, boiling and bleaching machine of the second printing and dyeing plant; 35. Delivery pump h; 36. Flow meter; 37. Liquid level meter j. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with specific embodiments.

[0020] The term "alkali tank" described in the utility model indicates that all the weak alkali storage containers are for the purpose of combining with the actual illustrations, and do not indicate or imply that the device or element referred to must have a specific shape. Therefore, it cannot be understood as a limitation of the utility model. The pump and control cabinet described in the utility model are an integrated device, which is a conventional setting in the field and will not be discussed again. The utility model is based on the original weak alkali part directly reused to the sewage station, and the remaining weak alkali needs to be recovered by evaporation alkali recovery equipment. The improvement made by evaporation alkali recovery is low in economic benefits. Through the balance analysis of the weak alkali produced by mercerization and the amount of alkali used in various places, the weak alkali in the park is balanced and adjusted, and the direct reuse of the weak alkali in the sewage station is realized. The remaining part of the weak alkali is filtered and compounded to the standard concentration for use in the dyeing and finishing workshop. All the waste weak alkali produced does not need to be evaporated and recovered but is directly reused.

[0021] like Figure 1As shown, the alkali balancing and recycling device comprises an alkali balancing device 1 of a sewage station, an alkali storage tank 2 of the printing and dyeing plant, an alkali storage tank 3 of the printing and dyeing plant, a mixing conditioning tank A12, a standard alkali tank A15, a mixing conditioning tank B27, and a standard alkali tank B30. The alkali storage tank 3 of the printing and dyeing plant is connected to a delivery pump B9, which is connected to an automatic feeding control cabinet A10, which is connected to an online concentration monitoring device A11, which is connected to a mixing conditioning tank A12, which is connected to a standard alkali tank A15, which is connected to a de-boiling and alkali adding tank A18, and a de-boiling and alkali adding tank A27. 18 is connected to the de-boiling and bleaching combined machine 20 of the first printing and dyeing plant; the alkali storage tank 3 of the first printing and dyeing plant is connected to the alkali storage tank 2 of the second printing and dyeing plant, the alkali storage tank 2 of the second printing and dyeing plant is connected to the delivery pump e22, the delivery pump e22 is connected to the automatic feeding control cabinet B25, the automatic feeding control cabinet B25 is connected to the concentration online monitoring device B26, the concentration online monitoring device B26 is connected to the mixing and conditioning tank B27, the mixing and conditioning tank B27 is connected to the standard alkali tank B30, the standard alkali tank B30 is connected to the de-boiling and alkali adding tank B33, the de-boiling and alkali adding tank B33 is connected to the de-boiling and bleaching combined machine 34 of the second printing and dyeing plant; the alkali storage tank 2 of the second printing and dyeing plant is connected to the alkali balance device 1 of the sewage station. The concentration online monitoring device A11 is an online refractometer concentration detector.

[0022] The alkali storage tank 3 of the printing and dyeing plant 1 is connected to the delivery pump a5, the delivery pump a5 is connected to the alkali storage tank 2 of the printing and dyeing plant 2 through the connecting pipe 6, the alkali storage tank 2 of the printing and dyeing plant 2 is connected to the delivery pump h35, the delivery pump h35 is connected to the flow meter 36, and the flow meter 36 is connected to the alkali balance device 1 of the sewage station.

[0023] A delivery pump c14 is provided between the mixing and conditioning tank A12 and the standard alkali tank A15, and a delivery pump d17 is provided between the standard alkali tank A15 and the de-boiling and alkali-adding tank A18.

[0024] A delivery pump f29 is provided between the mixing conditioning tank B27 and the standard alkali tank B30, and a delivery pump g32 is provided between the standard alkali tank B30 and the deboiling and alkali adding tank B33.

[0025] A liquid level gauge a4 is provided on the alkali storage tank 3 of the printing and dyeing plant 1, a liquid level gauge c13 is provided on the mixing and conditioning tank A12, a liquid level gauge d16 is provided on the standard alkali tank A15, and a liquid level gauge e19 is provided on the deboiling and alkali adding tank A18.

[0026] A liquid level gauge f21 is provided on the alkali storage tank 2 of the printing and dyeing plant No. 2, a liquid level gauge h28 is provided on the mixing and conditioning tank B27, a liquid level gauge i31 is provided on the standard alkali tank B30, and a liquid level gauge j37 is provided on the deboiling and alkali adding tank B33.

[0027] The inlet of the delivery pump b9 is connected to the raw alkali tank 7 of the printing and dyeing plant No. 1, and a liquid level meter b8 is provided on the raw alkali tank 7 of the printing and dyeing plant No. 1.

[0028] The inlet of the delivery pump e22 is connected to the raw alkali tank 23 of the printing and dyeing plant No. 2, and a liquid level meter g24 is provided on the raw alkali tank 23 of the printing and dyeing plant No. 2.

[0029] The described balanced recycling device for diluted alkali, when working, based on the prior art, the alkali storage tank 3 of the printing and dyeing plant 1 is adjusted by the automatic feeding control cabinet A10 and the concentration online monitoring device A11, and the original alkali tank 7 of the printing and dyeing plant 1 is adjusted, and alkali is continuously added to the mixing and conditioning tank A12 according to the corresponding basic concentration ratio of the original alkali and diluted alkali. To ensure the cleanliness of the alkali solution, after the alkali solution in the mixing and conditioning tank A12 is stirred and mixed, the concentration online monitoring device A11 detects the initial alkali concentration, and the automatic feeding control cabinet A10 controls the start of the diluted alkali and original alkali mixing control valves according to the actual concentration detected by the concentration online monitoring device A11 and the set standard concentration. When the conditioning and mixing reaches the standard concentration range, it is injected into the standard alkali tank A15 through the connecting pipeline, and the standard alkali tank A15 controls the high and low liquid levels through the liquid level meter d16 to control the start of the mixing and alkali preparation process. The standard alkali tank A15 is connected to the de-boiling and alkali adding tank A18, and is supplied to the de-boiling and bleaching combined machine 20 of the printing and dyeing plant 1.

[0030] The alkali storage tank 2 of the printing and dyeing plant No. 2 is adjusted by the automatic feeding control cabinet B25 and the concentration online monitoring device B26, and is adjusted with the original alkali tank 23 of the printing and dyeing plant No. 2. According to the corresponding basic concentration ratio of the original alkali and the dilute alkali, alkali is continuously added to the mixing conditioning tank B27. To ensure the cleanliness of the alkali solution, the alkali solution in the mixing conditioning tank B27 is stirred and mixed, and the concentration online monitoring device B26 detects the initial alkali concentration. The automatic feeding control cabinet B25 controls the actuation of the dilute alkali and original alkali mixing control valves according to the actual concentration detected by the concentration online monitoring device B26 and the set standard concentration. When the conditioning and mixing reaches the standard concentration range, it is connected to the standard alkali tank B30 through the connecting pipeline. The standard alkali tank B30 is connected to the deboiling and alkali adding tank B33, and is supplied to the deboiling and bleaching combined machine 34 of the printing and dyeing plant No. 2.

[0031] When there is a surplus of caustic soda, the high and low liquid levels are still controlled by the level gauge on the basis of inter-factory caustic soda, and the space above the high liquid level of the corresponding caustic soda storage tank is used for temporary storage; when caustic soda is insufficient, priority is given to the use of caustic soda in the sewage station, and the caustic soda used in the dyeing and finishing workshop can still be prepared from the original caustic soda and water to make standard caustic soda to ensure the use of various dyeing and finishing machines. The caustic soda produced by mercerization in the dyeing and finishing workshop is used in the dyeing and finishing and sewage station alkali balancing device. The alkali recovery tank in the printing and dyeing park is connected to the alkali storage tank of the sewage station. The caustic soda in the sewage station completely replaces the concentrated alkali, and the original evaporation alkali recovery equipment is stopped. The remaining caustic soda is filtered and replaced with water to be directly compounded with the original alkali into standard alkali for use in the dyeing and finishing workshop. The caustic soda is directly recycled and utilized without evaporation alkali recovery equipment, which greatly reduces the alkali recovery operation cost and the comprehensive alkali cost.

[0032] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and any equivalent changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention shall fall within the scope of the patent coverage of the present invention.

Claims

1. A balanced recycling device for diluted alkali, characterized in that: The invention comprises an alkali balance device (1) of a sewage station, an alkali storage tank (2) of a printing and dyeing plant No. 2, an alkali storage tank (3) of a printing and dyeing plant No. 1, a mixing and conditioning tank A (12), a standard alkali tank A (15), a mixing and conditioning tank B (27), and a standard alkali tank B (30). The alkali storage tank (3) of the printing and dyeing plant No. 1 is connected to a delivery pump B (9), the delivery pump B (9) is connected to an automatic feeding control cabinet A (10), the automatic feeding control cabinet A (10) is connected to an online concentration monitoring device A (11), the online concentration monitoring device A (11) is connected to a mixing and conditioning tank A (12), the mixing and conditioning tank A (12) is connected to a standard alkali tank A (15), the standard alkali tank A (15) is connected to a de-boiling and alkali adding tank A (18), the de-boiling and alkali adding tank A (18) is connected to a printing and dyeing plant No.

1. The alkali storage tank (3) of the first printing and dyeing plant is connected to the alkali storage tank (2) of the second printing and dyeing plant, the alkali storage tank (2) of the second printing and dyeing plant is connected to the delivery pump e (22), the delivery pump e (22) is connected to the automatic feeding control cabinet B (25), the automatic feeding control cabinet B (25) is connected to the concentration online monitoring device B (26), the concentration online monitoring device B (26) is connected to the mixing and conditioning tank B (27), the mixing and conditioning tank B (27) is connected to the standard alkali tank B (30), the standard alkali tank B (30) is connected to the de-boiling and alkali adding tank B (33), the de-boiling and alkali adding tank B (33) is connected to the de-boiling and bleaching combined machine (34) of the second printing and dyeing plant; the alkali storage tank (2) of the second printing and dyeing plant is connected to the alkali balancing device (1) of the sewage station.

2. The balanced recycling device for diluted alkali according to claim 1 is characterized in that: The alkali storage tank (3) of the first printing and dyeing plant is connected to the delivery pump a (5), the delivery pump a (5) is connected to the alkali storage tank (2) of the second printing and dyeing plant through a connecting pipe (6), the alkali storage tank (2) of the second printing and dyeing plant is connected to the delivery pump h (35), the delivery pump h (35) is connected to the flow meter (36), and the flow meter (36) is connected to the alkali balance device (1) of the sewage station.

3. The balanced recycling device for diluted alkali according to claim 1 is characterized in that: A delivery pump c (14) is provided between the mixing and conditioning tank A (12) and the standard alkali tank A (15), and a delivery pump d (17) is provided between the standard alkali tank A (15) and the de-boiling and alkali-adding tank A (18).

4. The balanced recycling device for diluted alkali according to claim 1 is characterized in that: A delivery pump f (29) is provided between the mixing and conditioning tank B (27) and the standard alkali tank B (30), and a delivery pump g (32) is provided between the standard alkali tank B (30) and the de-boiling and alkali-adding tank B (33).

5. The balanced recycling device for diluted alkali according to claim 1 is characterized in that: A liquid level gauge a (4) is provided on the alkali storage tank (3) of the first printing and dyeing plant, a liquid level gauge c (13) is provided on the mixing and conditioning tank A (12), a liquid level gauge d (16) is provided on the standard alkali tank A (15), and a liquid level gauge e (19) is provided on the deboiling and alkali adding tank A (18).

6. The balanced recycling device for diluted alkali according to claim 1 is characterized in that: The alkali storage tank (2) of the second printing and dyeing plant is provided with a liquid level gauge f (21), the mixing and conditioning tank B (27) is provided with a liquid level gauge h (28), the standard alkali tank B (30) is provided with a liquid level gauge i (31), and the de-boiling and alkali adding tank B (33) is provided with a liquid level gauge j (37).

7. The balanced recycling device for diluted alkali according to claim 1 is characterized in that: The inlet of the delivery pump b (9) is connected to the raw alkali tank (7) of the first printing and dyeing plant, and a liquid level meter b (8) is arranged on the raw alkali tank (7) of the first printing and dyeing plant.

8. The balanced recycling device for diluted alkali according to claim 1 is characterized in that: The inlet of the delivery pump e (22) is connected to the raw alkali tank (23) of the second printing and dyeing factory, and a liquid level meter g (24) is arranged on the raw alkali tank (23) of the second printing and dyeing factory.

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