A device and method for removing crust inside pipeline of starch continuous steaming system

Abstract

The present invention discloses a device and method for removing starch crust inside the pipeline of a continuous steaming system. The device comprises a starch dissolving tank, a starch intermediate tank, a first feed pump, a conversion tank, a second feed pump, a steamer, a starch sizing tank, a third feed pump and a sizing dilution tank connected in sequence; the outlet pipeline of the first feed pump is connected with a first drain valve and a first steam pipe, the outlet pipeline of the second feed pump is connected with a second drain valve and a second steam pipe, and the outlet pipeline of the third feed pump is connected with a third drain valve and a third steam pipe. In other words, the technical solution provided by the present invention ensures the cleaning efficiency of starch crust and also improves the cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking, and in particular to a device and method for removing crusting inside a pipeline of a continuous starch steaming system. Background Art

[0002] After the starch continuous steaming system has been running for a period of time, a thick layer of starch crust will form inside the pipe, with a thickness of up to 10 mm. Furthermore, some of the crust will fall off under the action of liquid flow and enter the sizing system, which has a great impact on the quality of paper sheets and sizing equipment. In the prior art, the pipes are generally flushed with hot water, but the cleaning effect is poor. If the pipes are dismantled for cleaning, it is time-consuming and labor-intensive, delaying production. Therefore, it is necessary to propose a new solution to improve the cleaning effect and efficiency of starch crust.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a device and method for removing the crust inside the pipeline of a starch steaming system, aiming to solve the technical problem of poor cleaning effect of the crust inside the pipeline of a starch steaming system in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for removing crusting inside a starch continuous steaming system pipeline comprises a starch dissolving tank, a starch intermediate tank, a first feeding pump, a conversion tank, a second feeding pump, a digester, a starch sizing tank, a third feeding pump and a sizing dilution tank which are connected in sequence; the outlet pipeline of the first feeding pump is connected with a first drain valve and a first steam pipe, the outlet pipeline of the second feeding pump is connected with a second drain valve and a second steam pipe, and the outlet pipeline of the third feeding pump is connected with a third drain valve and a third steam pipe; the outlet pipeline of the third feeding pump is connected with a first branch pipe and a second branch pipe, the first branch pipe is connected to the sizing dilution tank, and the second branch pipe is connected to the starch sizing tank; the sizing dilution tank is provided with a fourth drain valve.

[0007] Furthermore, in the device for removing starch crust inside the continuous steaming system pipeline, a first steam one-way valve is provided on the first steam pipe, a second steam one-way valve is provided on the second steam pipe, and a third steam one-way valve is provided on the third steam pipe.

[0008] Furthermore, in the device for removing starch crust inside the pipeline of the continuous steaming system, a heating coil is provided on the outlet pipeline of the first feeding pump, and the heating coil is located downstream of the first steam pipe.

[0009] Furthermore, in the device for removing crust inside the pipeline of the starch continuous steaming system, a fifth sewage valve is arranged on the second branch pipe, a sixth sewage valve is arranged at the outlet end of the conversion tank, and a seventh sewage valve is arranged at the outlet end of the starch dissolving tank.

[0010] Furthermore, in the device for removing the crust inside the pipeline of the starch continuous steaming system, the first feeding pump, the second feeding pump and the third feeding pump are all screw pumps.

[0011] The present invention accordingly provides a method for removing the crust inside the pipeline of the starch continuous steaming system, which mainly comprises the following steps:

[0012] (1) A device for removing the crust inside the pipeline of the starch steaming system is provided according to claim 1;

[0013] (2) Prepare 200 parts of caustic soda solution, 1 part of antifoaming agent, and 3800 parts of clean water by weight;

[0014] (3) Add the prepared clean water and caustic soda solution to the starch dissolution tank in turn and stir for 5 minutes; add the antifoaming agent and stir for another 10 minutes;

[0015] (4) The solution in the starch dissolving tank is discharged into the starch intermediate tank, and then pumped out through the first feeding pump. Steam is introduced into the first steam pipe to heat the solution to 95-100°C;

[0016] (5) The solution heated in step (4) is sent to a conversion tank and soaked for a period of time T1;

[0017] (6) The second feed pump extracts the solution from the conversion tank, and the second steam pipe introduces steam to heat the solution to 100-130°C. The solution passes through the digester and enters the starch sizing tank for soaking for a period of time T2.

[0018] (7) The third feed pump extracts the solution in the starch sizing tank, and the third steam pipe introduces steam to heat the solution to 95-100°C. Part of the solution is sent to the sizing dilution tank, and the other part of the solution is sent to the starch sizing tank.

[0019] Furthermore, in the method for removing the crust inside the pipeline of the starch continuous steaming system, the mass concentration of the caustic soda solution is 30%.

[0020] Furthermore, the method for removing starch crust inside the pipeline of the continuous steaming system is characterized in that T1 in step (5) is 5 minutes.

[0021] Furthermore, in the method for removing starch crust inside the pipeline of the continuous steaming system, T1 in step (6) is 20 minutes.

[0022] Beneficial effects: The present invention provides a device and method for removing the crust inside the pipeline of the starch steaming system. Compared with the prior art, the present invention heats the caustic soda solution by setting a first steam pipe, a second steam pipe and a third steam pipe respectively, and uses the heated caustic soda solution to flush the pipeline and various equipment, thereby effectively removing the crust inside the pipeline of the starch steaming system. In addition, since the cleaning method does not require the removal of the pipeline, the cleaning efficiency is improved and the shutdown time of the device is reduced. In other words, the technical solution provided by the present invention ensures the cleaning efficiency of the starch crust and also improves the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural principle diagram of the device for removing the crust inside the pipeline of the starch steaming system provided by the present invention. DETAILED DESCRIPTION

[0024] The present invention provides a device and method for removing the crust inside the pipeline of a starch continuous steaming system. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] See also Figure 1 The present invention provides a device for removing the crust inside the pipeline of the starch continuous steaming system. The arrows in the attached drawings indicate the flow direction of the fluid. The attached drawings are only used to assist in explaining the structural principle of the device, and only the main equipment, pipelines and valves are drawn. In actual applications, corresponding valves, pipe fittings, etc. can be set according to specific circumstances, and are not limited here.

[0026] The device for removing the crust inside the pipeline of the starch continuous steaming system includes a starch dissolving tank 11, a starch intermediate tank 12, a first feeding pump 21, a conversion tank 13, a second feeding pump 22, a digester 14, a starch sizing material storage tank 15, a third feeding pump 23 and a sizing dilution tank 16 which are connected in sequence; the outlet pipeline of the first feeding pump is connected with a first drain valve 51 and a first steam pipe 31, the outlet pipeline of the second feeding pump is connected with a second drain valve 52 and a second steam pipe 32, and the outlet pipeline of the third feeding pump is connected with a third drain valve 53 and a third steam pipe 33; the outlet pipeline of the third feeding pump is connected with a first branch pipe 61 and a second branch pipe 62, the first branch pipe is connected to the sizing dilution tank, and the second branch pipe is connected to the starch sizing material storage tank; the sizing dilution tank is provided with a fourth drain valve 54.

[0027] Preferably, a first steam one-way valve 310 is provided on the first steam pipe, a second steam one-way valve 320 is provided on the second steam pipe, and a third steam one-way valve 330 is provided on the third steam pipe.

[0028] Preferably, a heating coil 9 is provided on the outlet pipe of the first feed pump, and the heating coil is located downstream of the first steam pipe. By providing the heating coil, the solution is auxiliary heated to ensure that the solution can be heated to a predetermined temperature.

[0029] Preferably, a fifth sewage valve 55 is provided on the second branch pipe, a sixth sewage valve 56 is provided at the outlet end of the conversion tank, and a seventh sewage valve 57 is provided at the outlet end of the starch dissolving tank.

[0030] Preferably, the first feeding pump, the second feeding pump and the third feeding pump are all screw pumps.

[0031] The present invention accordingly provides a method for removing the crust inside the pipeline of the starch continuous steaming system, comprising the following steps:

[0032] (1) A device for removing the crust inside the pipeline of the starch steaming system is provided according to claim 1;

[0033] (2) Prepare 200 parts of caustic soda solution, 1 part of antifoaming agent, and 3800 parts of clean water by weight;

[0034] (3) Add the prepared clean water and caustic soda solution to the starch dissolution tank in turn and stir for 5 minutes; add the antifoaming agent and stir for another 10 minutes;

[0035] (4) The solution in the starch dissolving tank is discharged into the starch intermediate tank, and then pumped out through the first feeding pump. Steam is introduced into the first steam pipe to heat the solution to 95-100°C;

[0036] (5) The solution heated in step (4) is sent to a conversion tank and soaked for a period of time T1;

[0037] (6) The second feed pump extracts the solution from the conversion tank, and the second steam pipe introduces steam to heat the solution to 100-130°C. The solution passes through the digester and enters the starch sizing tank for soaking for a period of time T2.

[0038] (7) The third feed pump extracts the solution in the starch sizing tank, and the third steam pipe introduces steam to heat the solution to 95-100°C. Part of the solution is sent to the sizing dilution tank, and the other part of the solution is sent to the starch sizing tank.

[0039] When the cleaning is completed, open each drain valve to discharge the solution and the crust slurry produced by cleaning. Before cleaning, the thickness of the starch crust can reach 10mm. After cleaning, open the pipeline for inspection and all the starch crust inside the pipeline is removed and there is no crust.

[0040] Preferably, the mass concentration of the caustic soda solution is 30%.

[0041] Preferably, in step (5), T1 is 5 minutes.

[0042] Preferably, in step (6), T1 is 20 minutes.

[0043] Through the above analysis, it can be seen that compared with the prior art, the present invention heats the caustic soda solution respectively by setting the first steam pipe, the second steam pipe and the third steam pipe, and uses the heated caustic soda solution to flush the pipes and various equipment, thereby effectively removing the crust inside the pipes of the starch continuous steaming system. In addition, since the cleaning method does not require the removal of the pipes, the cleaning efficiency is improved and the shutdown time of the device is reduced. In other words, the technical solution provided by the present invention ensures the cleaning efficiency of the starch crust and also improves the cleaning effect.

[0044] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A device for removing the crust inside the pipeline of a starch continuous steaming system, comprising a starch dissolving tank and a starch intermediate tank, characterized in that: It also includes a first feed pump, a conversion tank, a second feed pump, a cooker, a starch sizing tank, a third feed pump and a sizing dilution tank which are connected in sequence; the outlet pipe of the first feed pump is connected with a first drain valve and a first steam pipe, the outlet pipe of the second feed pump is connected with a second drain valve and a second steam pipe, and the outlet pipe of the third feed pump is connected with a third drain valve and a third steam pipe; the outlet pipe of the third feed pump is connected with a first branch pipe and a second branch pipe, the first branch pipe is connected to the sizing dilution tank, and the second branch pipe is connected to the starch sizing tank; the sizing dilution tank is provided with a fourth drain valve; a heating coil is provided on the outlet pipe of the first feed pump, and the heating coil is located downstream of the first steam pipe.

2. The device for removing starch crust inside the pipeline of the continuous steaming system according to claim 1 is characterized in that: The first steam pipe is provided with a first steam one-way valve, the second steam pipe is provided with a second steam one-way valve, and the third steam pipe is provided with a third steam one-way valve.

3. The device for removing starch crust inside the pipeline of the continuous steaming system according to claim 1, characterized in that: The second branch pipe is provided with a fifth sewage valve, the outlet end of the conversion tank is provided with a sixth sewage valve, and the outlet end of the starch dissolving tank is provided with a seventh sewage valve.

4. The device for removing starch crust inside the pipeline of the continuous steaming system according to claim 1, characterized in that: The first feeding pump, the second feeding pump and the third feeding pump are all screw pumps.

5. A method for removing the crust inside the pipeline of a starch continuous steaming system, characterized in that: The following steps are involved: (1) A device for removing the crust inside the pipeline of the starch steaming system is provided according to claim 1; (2) Prepare 200 parts of caustic soda solution, 1 part of antifoaming agent, and 3800 parts of clean water by weight; (3) Add the prepared clean water and caustic soda solution to the starch dissolution tank in turn and stir for 5 minutes; add the antifoaming agent and stir for another 10 minutes; (4) The solution in the starch dissolving tank is discharged into the starch intermediate tank, and then pumped out through the first feeding pump. Steam is introduced into the first steam pipe to heat the solution to 95-100°C; (5) The solution heated in step (4) is sent to a conversion tank and soaked for a period of time T1; (6) The second feed pump extracts the solution from the conversion tank, and the second steam pipe introduces steam to heat the solution to 100-130°C. The solution passes through the digester and enters the starch sizing tank for soaking for a period of time T2. (7) The third feed pump extracts the solution in the starch sizing tank, and the third steam pipe introduces steam to heat the solution to 95-100°C. Part of the solution is sent to the sizing dilution tank, and the other part of the solution is sent to the starch sizing tank.

6. The method for removing starch crust inside the pipeline of the continuous steaming system according to claim 5, characterized in that: The mass concentration of caustic soda solution is 30%.

7. The method for removing starch crust inside the pipeline of the continuous steaming system according to claim 5, characterized in that: In step (5), T1 is 5 minutes.

8. The method for removing starch crust inside the pipeline of a continuous steaming system according to claim 5, characterized in that: In step (6), T1 is 20 minutes.

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