A sodium hydrosulfite feeding system

Abstract

The present invention discloses a sodium dithionite feeding system, which includes a feeding tank. The feeding tank is provided with a feed pipe, a discharge pipe and a negative pressure pipe. The discharge pipe is connected to a chemical dissolution tank through an automatic conveying mechanism. A fixed bracket is provided outside the chemical dissolution tank. An annular weighing bracket is provided on the outer wall of the chemical dissolution tank. A plurality of weighing sensors are provided between the weighing bracket and the fixed bracket. The chemical dissolution tank is suspended on the fixed bracket by pressing on the weighing sensors through the weighing bracket; the outlet end of the negative pressure pipe is connected to a cleaning chamber. A plurality of filtering components are provided in the cleaning chamber. A transverse pull rod passing through and connecting all the filtering components is provided at the bottom of the filtering components. Both ends of the transverse pull rod extend out of the cleaning chamber and are slidably connected to the cleaning chamber. An exhaust pipe extending out of the cleaning chamber and connected to a vacuum pump is provided in the filtering component. The present invention has the characteristics of avoiding the discharge of sodium dithionite into the air and ensuring the accurate preparation of sodium dithionite at the same time.

Description

Technical Field

[0001] The present invention relates to a device for treating printing and dyeing raw materials, in particular to a sodium hydrosulfite feeding system. Background Art

[0002] Sodium dithionite, also known as sodium hydrosulfite, is a white sand-like crystal or light yellow powder chemical. Due to sulfur being in an intermediate valence state, sodium dithionite has both strong reducing properties and strong oxidizing properties. After configuring sodium hydrosulfite and caustic soda in proportion, it can be used for reducing dyeing, reduction cleaning, printing, decolorization, and even bleaching of fabrics such as silk, wool, and nylon as needed. It is widely used in the reducing dyeing, reduction cleaning, bleaching, and organic synthesis of the textile printing and dyeing industry. However, sodium hydrosulfite belongs to a first-class flammable substance, and it will release a large amount of heat and toxic gases such as sulfur dioxide and hydrogen sulfide when it comes into contact with water, so it needs to be handled with care.

[0003] Conventionally, sodium hydrosulfite is directly stored in the original insurance barrel. When it is needed, the insurance barrel is opened and sodium hydrosulfite is taken out for weighing, and then it is transported to the chemical material mixing barrel to be mixed with other components (such as caustic soda). At present, although there is already a sealed sodium hydrosulfite feeding device, during the feeding and air extraction process, some sodium hydrosulfite powder will still be discharged with the extracted gas, which will not only cause pollution to the working environment and endanger the health of workers, but also easily come into contact with external water and release toxic gases, posing a great potential safety hazard. Moreover, during the feeding and chemical material mixing process, manual weighing is used, resulting in low work efficiency and low accuracy; while using a screw conveyor for weighing, there will be a certain amount of conveying residue after the raw material is conveyed by the screw conveyor, resulting in a certain deviation between the actual amount of sodium hydrosulfite entering the chemical material mixing barrel and the specified usage amount.

[0004] Therefore, in the existing sodium hydrosulfite feeding system, there are problems that some sodium hydrosulfite will be discharged with the atmosphere and the accuracy of the feeding amount is not ideal. Summary of the Invention

[0005] The purpose of the present invention is to provide a sodium hydrosulfite feeding system. The present invention has the characteristics of avoiding sodium hydrosulfite from being discharged into the air and ensuring accurate configuration of sodium hydrosulfite.

[0006] Technical solution of the present invention: A sodium dithionite feeding system includes a feeding tank, on which a feed pipe, a discharge pipe and a negative pressure pipe are provided. The discharge pipe is connected to a chemical dissolving tank through an automatic conveying mechanism. An external fixed bracket is provided on the chemical dissolving tank, and an annular weighing bracket is provided on the outer wall of the chemical dissolving tank. A number of weighing sensors are provided between the weighing bracket and the fixed bracket. The chemical dissolving tank is suspended on the fixed bracket by pressing on the weighing sensors through the weighing bracket; the outlet end of the negative pressure pipe is connected to a cleaning chamber, and a number of filtering components are provided in the cleaning chamber. A horizontal pull rod passing through and connecting all the filtering components is provided at the bottom of the filtering components. Both ends of the horizontal pull rod extend out of the cleaning chamber and are slidably connected to the cleaning chamber. An exhaust pipe extending out of the cleaning chamber and connected to a vacuum pump is provided in the filtering component.

[0007] In the sodium dithionite feeding system described above, the filtering component includes a metal partition board and a filter bag. The metal partition board divides the cleaning chamber into a filtering area and an exhaust area. The negative pressure pipe and the filter bag are located in the filtering area. A number of through holes for installing the filter bag are provided on the metal partition board. An annular shelf is provided at the bag mouth of the filter bag, and the diameter of the annular shelf is larger than that of the through hole. A number of magnetic attraction blocks adsorbed to the metal partition board are provided on the annular shelf.

[0008] In the sodium dithionite feeding system described above, the filter bag includes a bag body located in the filtering area and a bag top sealing the annular shelf. A number of annular frames are provided on the bag body. The bag body is connected to the horizontal pull rod. An exhaust port for the exhaust pipe to extend into is provided on the bag top.

[0009] In the sodium dithionite feeding system described above, a limit sleeve is provided outside the cleaning chamber. Both ends of the horizontal pull rod extend out of the limit sleeve and are provided with a handle. A spring is provided between the handle and the limit sleeve. One end of the spring is connected to the limit sleeve, and the other end of the spring is connected to the handle.

[0010] In the sodium dithionite feeding system described above, a dust cleaning port is provided at the bottom of the cleaning chamber, and an ash receiving box is provided below the dust cleaning port.

[0011] In the sodium dithionite feeding system described above, a limit plate located at the edge of the weighing bracket is provided on the fixed bracket. An anti-lifting bracket located above the weighing bracket is provided on the limit plate. A ball bearing is provided on the anti-lifting bracket, and a buffer pad is provided on the surface of the weighing bracket.

[0012] In the sodium dithionite feeding system described above, a gap is left between the bottom of the ball bearing and the top of the weighing bracket.

[0013] In the sodium dithionite feeding system described above, a number of vertical screw rods are threadedly connected to the fixed bracket. A support platform located below the weighing bracket is provided at the upper end of the screw rod. A rotating wheel is provided at the lower end of the screw rod. Elastic balls are provided on the surface of the support platform.

[0014] In the sodium dithionite feeding system described above, a two-way negative pressure valve is further provided on the feeding tank.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] Through the air extraction treatment of the negative pressure pipe, a negative pressure state is formed in the feeding tank, thereby realizing the automatic feeding of the feeding pipe. The air extracted from the feeding tank by the vacuum pump enters the cleaning chamber along the negative pressure pipe. After being filtered by multiple filter components, the sodium dithionite is blocked and adsorbed on the outside of the filter components, and the clean air is discharged along the exhaust pipe, avoiding the pollution caused by the direct discharge of sodium dithionite into the air; for the sodium dithionite attached to the outside of the filter bag, by pulling the horizontal pull rod and shaking the filter bag, the sodium dithionite is shaken off from the filter bag to ensure the permeability of the filter bag;

[0017] Through the discharge pipe and the screw conveyor, the sodium dithionite is automatically conveyed into the chemical dissolution tank, improving the powder feeding efficiency. Since the chemical dissolution tank is suspended on the fixed support through the weighing sensor, the weighing sensor can be used to weigh other raw materials such as sodium dithionite conveyed into the chemical dissolution tank in real time, and the quality is controllable, thereby realizing the precise configuration of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is Figure 1 the schematic structural diagram of part A in

[0020] Figure 3 is a schematic structural diagram of the annular shelf;

[0021] Figure 4 is a schematic structural diagram of the support platform.

[0022] The reference signs in the drawings are: 1, feeding tank; 11, feeding pipe; 12, discharge pipe; 13, negative pressure pipe; 14, automatic conveying mechanism; 15, two-way negative pressure valve; 2, chemical dissolution tank; 21, fixed support; 22, weighing support; 221, buffer pad; 23, weighing sensor; 24, limit plate; 25, anti-lifting support; 26, ball bearing; 27, screw; 28, support platform; 281, elastic ball; 29, rotating wheel; 3, cleaning chamber; 31, dust cleaning port; 32, exhaust pipe; 33, filtering area; 34, exhaust area; 35, limit sleeve; 36, ash receiving box; 4, filter component; 41, metal partition; 42, filter bag; 43, annular shelf; 44, magnetic attraction block; 45, bag body; 46, bag top; 47, annular frame; 48, exhaust port; 5, horizontal pull rod; 51, handle; 52, spring; 6, vacuum pump. DETAILED DESCRIPTION OF THE INVENTION

[0023] The present invention will be further described below in conjunction with embodiments, but it shall not be used as a basis for limiting the present invention.

[0024] Embodiment:

[0025] As Figures 1-4 shown, a sodium dithionite feeding system includes a feeding tank 1. The feeding tank 1 is provided with a feed pipe 11, a discharge pipe 12, and a negative pressure pipe 13. The discharge pipe 12 is connected to a chemical dissolution tank 2 via an automatic conveying mechanism 14, and the automatic conveying mechanism 14 can adopt a screw conveyor. A fixed bracket 21 is provided outside the chemical dissolution tank 2, and an annular weighing bracket 22 is provided on the outer wall of the chemical dissolution tank 2. Between the bottom of the weighing bracket 22 and the top of the fixed bracket 21, a plurality of weighing sensors 23 are provided. The chemical dissolution tank 2 is suspended on the fixed bracket 21 by pressing on the weighing sensors 23 through the weighing bracket 22.

[0026] The outlet end of the negative pressure pipe 13 is connected to a cleaning chamber 3. A plurality of filter components 4 are provided in the cleaning chamber 3. A transverse pull rod 5 passes through and is fixedly connected to all the filter components 4 at the bottom of the filter components 4. Both ends of the transverse pull rod 5 extend out of the cleaning chamber 3 and are slidably connected to the cleaning chamber 3. An exhaust pipe 32 that extends outside the cleaning chamber 3 and is connected to a vacuum pump 6 is provided in the filter component 4.

[0027] The filter component 4 includes a metal partition 41 and a filter bag 42. The metal partition 41 is installed in the cleaning chamber 3 to divide the cleaning chamber 3 into a filtering area 33 and an exhaust area 34. The negative pressure pipe 13 and the filter bag 42 are located in the filtering area 33, and the negative pressure pipe 13 is located outside the filter component 4. A plurality of through holes for installing the filter bag 42 are provided on the metal partition 41. An annular shelf 43 is provided at the bag mouth of the filter bag 42. The diameter of the annular shelf 43 is larger than the diameter of the through hole. A plurality of magnetic attraction blocks 44 that adsorb to the metal partition 41 are provided on the annular shelf 43. The filter bag 42 is placed on the metal partition 41 through the annular shelf 43 and fixed by the magnetic attraction blocks 44, which is not only convenient for installation and disassembly, but also firmly fixed, and will not cause the offset of the filter bag 42 during exhaust suction, ensuring the stability of filtration.

[0028] The filter bag 42 includes a bag body 45 located between the filtering areas 33 and a bag top 46 that seals the annular shelf 43. A plurality of annular frames 47 are provided on the bag body 45. The bag body 45 is connected to the transverse pull rod 5. An exhaust port 48 for the exhaust pipe 32 to extend into is provided on the bag top 46. The provided annular frames 47 are used to stabilize the shape and structure of the bag body 45, avoiding the deformation of the bag body 45 after shaking and affecting the filtration effect. At the same time, the bag top 46, the annular shelf 43, and the metal partition 41 cooperate to block the sodium dithionite in the filtering area 33, preventing the sodium dithionite from being directly discharged without filtration.

[0029] A limit sleeve 35 is provided outside the cleaning chamber 3. Both ends of the horizontal pull rod 5 extend out of the limit sleeve 35 and are provided with a handle 51. A spring 52 is provided between the handle 51 and the limit sleeve 35. One end of the spring 52 is connected to the limit sleeve 35, and the other end of the spring 52 is connected to the handle 51.

[0030] A dust cleaning port 31 is provided at the bottom of the cleaning chamber 3. A dust receiving box 36 is provided below the dust cleaning port 31 for receiving sodium dithionite cleaned from the filter assembly 4.

[0031] A limit plate 24 is provided on the fixed bracket 21 at the edge of the weighing bracket 22. An anti - jumping bracket 25 is provided on the limit plate 24 above the weighing bracket 22. A ball bearing 26 is provided on the anti - jumping bracket 25. A buffer pad 221 is provided on the surface of the weighing bracket 22. The provided limit plate 24 can move along the fixed bracket 21 and abut against the edge of the weighing bracket 22, thereby preventing the chemical material barrel 2 from shifting and tilting during the feeding and chemical reaction processes. By arranging the ball bearing 26 above the weighing bracket 22, the situation that the chemical material barrel 2 shakes due to the feeding of materials is avoided, ensuring smooth feeding and chemical reaction, and at the same time improving the weighing accuracy of the weighing sensor 23.

[0032] A gap is left between the bottom of the ball bearing 26 and the top of the weighing bracket 22.

[0033] A number of vertical screw rods 27 are thread - connected to the fixed bracket 21. The upper end of the screw rod 27 is provided with a support platform 28 below the weighing bracket 22. The lower end of the screw rod 27 is provided with a rotating wheel 29. Elastic balls 281 are provided on the surface of the support platform 28. By manually or automatically rotating the rotating wheel 29 to rotate the screw rod 27, the support platform 28 is pushed to jack up the chemical material barrel 2 until the chemical material barrel 2 contacts the ball bearing 26, and then the chemical material barrel 2 is translated, thus facilitating the removal of the chemical material barrel 2.

[0034] A two - way negative pressure valve 15 is further provided on the feeding tank 1 to adjust the air pressure in the feeding tank 1, making the feeding work smoother and more stable.

[0035] Working principle: Through the air extraction treatment of the negative pressure pipe 13, a negative pressure state is formed inside the feeding tank 1, so as to realize the automatic feeding of the feeding pipe 11. The air with sodium dithionite extracted from the feeding tank 1 by the vacuum pump 6 enters the cleaning chamber 3 along the negative pressure pipe 13. After being filtered by multiple filter components 4, the sodium dithionite is blocked and adsorbed on the outside of the filter components 4, and the clean air is discharged along the exhaust pipe 32, avoiding the pollution caused by the direct discharge of sodium dithionite into the air; for the sodium dithionite attached to the outside of the filter bag 42, by pulling the horizontal pull rod 5 to shake the filter bag 42, the sodium dithionite can be shaken off from the filter bag 42 to ensure the permeability of the filter bag 42; while manually pulling the horizontal pull rod 5 to shake the bag body 45, the spring 52 is arranged so that the horizontal pull rod 5 can automatically retract and move back and forth to a certain extent, strengthening the shaking effect on the filter bag 42 and improving the cleaning effect on the filter bag 42; the sodium dithionite cleaned off falls into the ash receiving box 36 through the ash cleaning port 31.

[0036] Through the discharge pipe 12 and the screw conveyor, the sodium dithionite is conveyed into the chemical material dissolving tank 2. Since the chemical material dissolving tank 2 is suspended on the fixed support 21 through the weighing sensor 23, the weighing sensor 23 can be used to weigh the sodium dithionite and other raw materials conveyed into the chemical material dissolving tank in real time to determine the actual chemical material dissolving amount, with controllable quality, realizing the precise configuration of raw materials; through the limit plate 24 and the anti-jumping support 25, the position of the chemical material dissolving tank 2 is limited to avoid the instability of the chemical material dissolving tank 2 during the material conveying and batching processes, which affects the weighing accuracy.

Claims

1. A sodium dithionite feeding system, characterized in that: It includes a feeding tank (1). A feed pipe (11), a discharge pipe (12) and a negative pressure pipe (13) are provided on the feeding tank (1). The discharge pipe (12) is connected to a chemical melting barrel (2) through an automatic conveying mechanism (14). A fixed bracket (21) is provided outside the chemical melting barrel (2). An annular weighing bracket (22) is provided on the outer wall of the chemical melting barrel (2). A number of weighing sensors (23) are provided between the weighing bracket (22) and the fixed bracket (21). The chemical melting barrel (2) is suspended on the fixed bracket (21) by pressing on the weighing sensors (23) through the weighing bracket (22); A limit plate (24) located at the edge of the weighing bracket (22) is provided on the fixed bracket (21). An anti-jumping bracket (25) located above the weighing bracket (22) is provided on the limit plate (24). A ball bearing (26) is provided on the anti-jumping bracket (25). A buffer pad (221) is provided on the surface of the weighing bracket (22); There is a gap between the bottom of the ball bearing (26) and the top of the weighing bracket (22); A number of vertical screw rods (27) are threadedly connected to the fixed bracket (21). A support platform (28) located below the weighing bracket (22) is provided at the upper end of the screw rod (27). A rotating wheel (29) is provided at the lower end of the screw rod (27). Elastic balls (281) are provided on the surface of the support platform (28); The outlet end of the negative pressure pipe (13) is connected to a cleaning chamber (3). A number of filter components (4) are provided in the cleaning chamber (3). A transverse pull rod (5) passing through and connecting all the filter components (4) is provided at the bottom of the filter component (4). Both ends of the transverse pull rod (5) extend out of the cleaning chamber (3) and are slidably connected to the cleaning chamber (3). An exhaust pipe (32) extending out of the cleaning chamber (3) and connected to a vacuum pump (6) is provided in the filter component (4).

2. The sodium hydrosulfite feeding system according to claim 1, wherein: The filter component (4) includes a metal partition plate (41) and a filter bag (42). The metal partition plate (41) divides the cleaning chamber (3) into a filtering area (33) and an exhaust area (34). The negative pressure pipe (13) and the filter bag (42) are located in the filtering area (33). A number of through holes for installing the filter bag (42) are provided on the metal partition plate (41). An annular shelf (43) is provided at the bag mouth of the filter bag (42). The diameter of the annular shelf (43) is larger than the diameter of the through hole. A number of magnetic attraction blocks (44) adsorbed to the metal partition plate (41) are provided on the annular shelf (43).

3. The sodium hydrosulfite feeding system according to claim 2, characterized in that: The filter bag (42) includes a bag body (45) located between the filtering areas (33) and a bag top (46) sealing the annular shelf (43). A number of annular frames (47) are provided on the bag body (45). The bag body (45) is connected to the transverse pull rod (5). An exhaust port (48) for the exhaust pipe (32) to extend into is provided on the bag top (46).

4. The sodium dithionite feeding system according to claim 1, wherein: A limit sleeve (35) is provided outside the cleaning chamber (3). Both ends of the transverse pull rod (5) extend out of the limit sleeve (35) and are provided with a handle (51). A spring (52) is provided between the handle (51) and the limit sleeve (35). One end of the spring (52) is connected to the limit sleeve (35), and the other end of the spring (52) is connected to the handle (51).

5. The sodium dithionite feeding system according to claim 1, wherein: A dust cleaning port (31) is provided at the bottom of the cleaning chamber (3), and an ash receiving box (36) is provided below the dust cleaning port (31).

6. The sodium dithionite feeding system according to claim 1, wherein: A two-way negative pressure valve (15) is further provided on the charging tank (1).

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