Novel modified starch washing and recycling system

Abstract

The utility model provides a novel washing and recycling system for modified starch, which comprises a raw material tank, a washing water tank, a three-stage recycling cyclone, a six-stage washing cyclone and a finished product tank, an outlet pipeline of the raw material tank and an underflow port pipeline of the three-stage recycling cyclone are jointly connected to a first-stage pump inlet of the six-stage washing cyclone; a first-stage overflow outlet pipeline of the three-stage recovery cyclone is connected to a settling tank, an upper pipeline of the settling tank is connected to a process water system, a lower pipeline of the settling tank is connected to an inlet of a recovery pump, an outlet pipeline of the recovery pump is connected to a raw material tank, and an underflow port of a fifth-stage washing cyclone is connected with a pipeline from a washing water tank; and a pump inlet of the sixth-stage washing cyclone is connected, and an underflow outlet pipeline of the sixth-stage washing cyclone is connected to a finished product tank. According to the utility model, a three-stage recovery cyclone and a six-stage washing cyclone are combined, so that more dry substances can be recovered while the washing effect is ensured, the product yield is further improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of starch production technology, specifically a novel washing and recycling system for modified starch. Background Technology

[0002] To improve starch properties and expand its applications, physical, chemical, or enzymatic treatments are used to introduce new functional groups into starch molecules or alter the molecular structure and granule properties. This changes alter the natural characteristics of starch (such as gelatinization temperature, thermal viscosity, stability, freeze-thaw stability, gelling power, film-forming properties, and transparency) to better suit specific application requirements. Starch that has undergone secondary processing and had its properties altered is collectively referred to as modified starch.

[0003] Modified starch is a modified starch product with wide applications in the food, textile, paper, chemical, and pharmaceutical industries. Currently, most modified starches are produced through chemical modification, requiring the addition of auxiliary materials and chemicals to promote the reaction. After the reaction, the product often contains other components and chemical residues, necessitating washing to remove these residues and ensure product compliance. Most companies currently use separators or 12-stage hydrocyclones for washing modified starch. However, due to inappropriate process and equipment configurations, this often results in unstable product quality, excessive consumption, and a lack of dry matter recovery, leading to low product yields and high production costs, thus hindering the company's sustainable development. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a novel modified starch washing and recycling system. It adopts a washing and recycling process that combines 6-stage washing with 3-stage recycling, and uses secondary sedimentation to recover dry matter. This not only improves the washing effect but also greatly reduces production costs. The use of an automated control system reduces various risk factors associated with manual on-site operation, and reduces energy consumption and increases product yield while ensuring stable product quality.

[0005] The technical solution provided by this utility model is as follows: A novel modified starch washing and recovery system includes a raw material tank, a washing water tank, a three-stage recovery hydrocyclone, a six-stage washing hydrocyclone, and a finished product tank. The outlet pipe of the raw material tank and the underflow pipe of the three-stage recovery hydrocyclone are connected to the inlet of the first-stage pump of the six-stage washing hydrocyclone. The overflow outlet pipe of the first-stage recovery hydrocyclone is connected to a settling tank. The upper pipe of the settling tank is connected to the process water system. The lower pipe of the settling tank is connected to the inlet of the recovery pump. The outlet pipe of the recovery pump is connected to the raw material tank. The underflow port of the fifth-stage washing hydrocyclone is connected to a pipe from the washing water tank and connected to the pump inlet of the sixth-stage washing hydrocyclone. The underflow outlet pipe of the sixth-stage washing hydrocyclone is connected to the finished product tank.

[0006] Furthermore, the bottom pipe of the raw material tank is connected to the inlet of the feed pump, the outlet pipe of the feed pump is connected to the inlet of the desander, the light phase liquid outlet pipe of the desander is connected to the inlet of the brush filter, the heavy phase liquid outlet pipe is connected to the desander hopper, the outlet of the brush filter is connected to the underflow port pipe of the three-stage recovery hydrocyclone, and the pipes are all connected to the inlet of the first stage pump of the six-stage washing hydrocyclone.

[0007] Furthermore, the feed pipe of the six-stage washing cyclone is equipped with a flow regulating device A, which includes a mass flow meter and a control regulating valve. It is connected to the OCC control room via a control line and automatically adjusts the feed rate according to the real-time operating conditions.

[0008] Furthermore, the upper pipe of the first stage washing hydrocyclone of the six-stage washing hydrocyclone is connected to the inlet of the third stage pump of the three-stage recovery hydrocyclone, and the upper pipe of the next stage hydrocyclone is connected to the inlet of the pump of the previous stage hydrocyclone.

[0009] Furthermore, the bottom pipe of the washing water tank is connected to the inlet of the washing water pump, the outlet pipe of the washing water pump is connected to the inlet of the water filter, and the outlet pipe of the water filter is connected to the inlet of the sixth-stage pump of the six-stage washing cyclone separator.

[0010] Furthermore, the washing water pipe of the six-stage washing cyclone is equipped with a flow regulating device B, which includes a flow meter and a self-control valve. It is connected to the OCC control room via a control line and automatically adjusts the washing water volume according to the real-time operating status to ensure the washing effect of the product.

[0011] Furthermore, a mass flow rate regulating device C, including a flow meter and an automatic control valve, is installed on the discharge pipe of the six-stage washing hydrocyclone. It is connected to the OCC control room via a control line to regulate and control the discharge flow rate according to the concentration of the discharged material, thereby ensuring the stability of the material concentration.

[0012] Furthermore, the settling tanks are arranged in a two-stage series combination. The overflow pipe of the first-stage settling tank is connected to the inlet of the second-stage settling tank, and the bottom pipes of the first and second-stage settling tanks are connected to the inlet of the recovery pump, so that the overflow after material washing undergoes secondary settling, maximizing the recovery of dry matter.

[0013] Furthermore, the underflow outlet of the sixth stage of the six-stage washing hydrocyclone is also provided with a pipe connected to the upper inlet of the raw material tank, the bottom pipe of the finished product tank is connected to the inlet of the discharge pump, and the outlet pipe of the discharge pump is connected to the next process.

[0014] Furthermore, the raw material tank is equipped with an electric stirrer and an online level gauge, as well as an online CIP cleaning nozzle, which can perform timed and quantitative sterilization and disinfection cleaning according to production needs.

[0015] The beneficial effects of this utility model are:

[0016] (1) This utility model has installed a sand remover and a brush filter on the feed pipe, which can effectively remove other impurities in the material and a small amount of gelatinized starch particles generated during the chemical denaturation process, thereby ensuring the purity of the material and improving the separation and washing effect. At the same time, an automatic control adjustment device is installed on the feed pipe, which can automatically adjust the feed rate according to the real-time operation status of production, ensuring the stability of the feed rate and improving product quality.

[0017] (2) This utility model adopts a combination of 3-stage recycling and 6-stage washing hydrocyclone, which greatly improves production efficiency and greatly reduces energy consumption. While ensuring the washing effect, it can recover more dry matter, thereby further improving the product yield and further reducing production costs.

[0018] (3) This utility model optimizes the way of using washing water. A water filter and a flow control device are installed on the washing water pipe, so that the amount of washing water used can be adjusted automatically according to the production operation status, thus saving water while ensuring the washing effect.

[0019] (4) This utility model has installed a mass flow rate self-control adjustment device on the washing discharge pipe, which can adjust the discharge concentration and flow rate of the product, ensuring the stability of the discharge concentration, thereby ensuring the stability of the product quality.

[0020] (5) This utility model uses a settling tank to perform secondary settling and recycling of the overflow of the discharged washing water, thereby recovering more dry matter, which further improves the product yield and further reduces the production and operating costs. Attached Figure Description

[0021] Figure 1 This is a process system diagram of this utility model;

[0022] In the diagram: 1—Raw material tank, 2—Feed pump, 3—Sand remover, 4—Sand removal hopper, 5—Brush filter, 6—Three-stage recovery hydrocyclone, 7—Settling tank, 8—Recovery pump, 9—Online level gauge, 10—CIP cleaning nozzle, 11—Electric agitator, 12—Washing water tank, 13—Washing water pump, 14—Water filter, 15—Six-stage washing hydrocyclone, 16—Finished product tank, 17—Discharge pump. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] like Figure 1 The novel modified starch washing and recovery system shown includes a raw material tank 1, a washing water tank 12, a three-stage recovery hydrocyclone 6, a six-stage washing hydrocyclone 15, and a finished product tank 16. The outlet pipe of the raw material tank 1 and the underflow pipe of the three-stage recovery hydrocyclone 6 are connected to the inlet of the first-stage pump of the six-stage washing hydrocyclone 15. The first-stage overflow outlet pipe of the three-stage recovery hydrocyclone 6 is connected to a settling tank 7. The upper pipe of the settling tank 7 is connected to the process water system, and the lower pipe of the settling tank 7 is connected to the inlet of the recovery pump 8. The outlet pipe of the recovery pump 8 is connected to the raw material tank 1. The underflow port of the fifth-stage washing hydrocyclone is connected to the pipe from the washing water tank 12 and connected to the pump inlet of the sixth-stage washing hydrocyclone. The underflow outlet pipe of the sixth-stage washing hydrocyclone is connected to the finished product tank 16.

[0027] The bottom pipe of the raw material tank 1 is connected to the inlet of the feed pump 2, the outlet pipe of the feed pump 2 is connected to the inlet of the desander 3, the light phase liquid outlet pipe of the desander 3 is connected to the inlet of the brush filter 5, the heavy phase liquid outlet pipe is connected to the desander hopper 4, and the outlet of the brush filter 5 is connected to the underflow port pipe of the three-stage recovery hydrocyclone 6. All pipes are connected to the inlet of the first-stage pump of the six-stage washing hydrocyclone 15. Multiple desanders 3 are provided.

[0028] The washing and recycling system also includes a flow regulating device A installed on the feed pipe, a flow regulating device B installed on the washing water pipe for regulating the washing water volume, and a flow regulating device C installed on the discharge pipe for regulating the discharge concentration.

[0029] The feed pipe of the six-stage washing hydrocyclone 15 is equipped with a flow regulating device A, which includes a mass flow meter and a control regulating valve. It is connected to the OCC control room by a control line and automatically adjusts the feed rate according to the real-time operating conditions.

[0030] The upper pipe of the first stage of the six-stage washing hydrocyclone 15 is connected to the inlet of the third stage pump of the three-stage recovery hydrocyclone 6, and the upper pipe of the next stage hydrocyclone is connected to the inlet of the pump of the previous stage hydrocyclone.

[0031] The bottom pipe of the washing water tank 12 is connected to the inlet of the washing water pump 13, the outlet pipe of the washing water pump 13 is connected to the inlet of the water filter 14, and the outlet pipe of the water filter 14 is connected to the inlet of the sixth pump of the six-stage washing cyclone separator 15.

[0032] The washing water pipe of the six-stage washing cyclone separator 15 is equipped with a flow regulating device B, which includes a flow meter and a self-control valve. It is connected to the OCC control room by a control line and automatically adjusts the washing water volume according to the real-time operating status.

[0033] The discharge pipe of the six-stage washing hydrocyclone 15 is equipped with a mass flow rate regulating device C, which includes a flow meter and an automatic control valve. It is connected to the OCC control room by a control line and the discharge flow rate is adjusted and controlled according to the concentration of the discharge.

[0034] The settling tank 7 adopts a two-stage series combination. The overflow port pipe of the first stage of the three-stage recovery hydrocyclone 6 is connected to the first stage inlet of the settling tank 7. The overflow pipe of the first stage settling tank is connected to the inlet of the second stage settling tank. The bottom pipes of the first and second stage settling tanks are connected to the inlet of the recovery pump 8.

[0035] The underflow outlet of the sixth stage washing hydrocyclone 15 is also provided with a pipe connected to the upper inlet of the raw material tank 1. The bottom pipe of the finished product tank 16 is connected to the inlet of the discharge pump 17, and the outlet pipe of the discharge pump 17 is connected to the next process.

[0036] The raw material tank 1 is equipped with an online level gauge 9 and an electric stirrer 11, as well as an online CIP cleaning nozzle 10.

[0037] In practical use, the modified starch solution concentration can be adjusted to 18-20 Baume degrees, the pH value adjusted, and then pumped into raw material tank 1. Simultaneously, the electric stirrer 11 in raw material tank 1 is started. When the liquid level reaches one-third of the tank's capacity, the washing water pump 13 is started (the washing water tank must maintain a 70% liquid level). At the same time, the 3-stage recovery hydrocyclone 6 and the 6-stage washing hydrocyclone 15 are started, followed by the brush filter 5 and the feed pump 2. The feed rate and washing water volume are adjusted through the control system. The overflow concentration is controlled by adjusting the overflow valve of the first stage of the 3-stage recovery hydrocyclone. The concentration is controlled at ≤0.5 Baume degrees. At the same time, the sampling valve of the discharge is opened for sampling and observation. The discharge flow control system is set to control the discharge concentration at 21 Baume degrees. During the initial operation of the system, the discharge concentration is low. The discharge control system will open the reflux valve and return the material to the raw material tank 1 through the pipeline for preliminary circulation to increase the concentration. When the concentration reaches 21 Baume degrees, the discharge valve opens and the reflux valve closes. The stable output of 21 Baume degree material enters the finished product tank 16 through the discharge pipeline. Then, the stirring device of the finished product tank 16 is started, and the material is transported to the next process through the discharge pump 17 via the pipeline.

[0038] The above description is merely a detailed description of the specific implementation scheme of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made on the design concept of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel modified starch washing and recovery system, characterized in that, The system includes a raw material tank (1), a washing water tank (12), a three-stage recovery hydrocyclone (6), a six-stage washing hydrocyclone (15), and a finished product tank (16). The outlet pipe of the raw material tank (1) and the underflow pipe of the three-stage recovery hydrocyclone (6) are connected to the inlet of the first-stage pump of the six-stage washing hydrocyclone (15). The first-stage overflow outlet pipe of the three-stage recovery hydrocyclone (6) is connected to the settling tank (7). The upper pipe of the settling tank (7) is connected to the process water system. The lower pipe of the settling tank (7) is connected to the inlet of the recovery pump (8). The outlet pipe of the recovery pump (8) is connected to the raw material tank (1). The underflow port of the fifth-stage washing hydrocyclone is connected to the pipe from the washing water tank (12) and connected to the pump inlet of the sixth-stage washing hydrocyclone. The underflow outlet pipe of the sixth-stage washing hydrocyclone is connected to the finished product tank (16).

2. The novel modified starch washing and recovery system according to claim 1, characterized in that, The bottom pipe of the raw material tank (1) is connected to the inlet of the feed pump (2), the outlet pipe of the feed pump (2) is connected to the inlet of the desander (3), the light phase liquid outlet pipe of the desander (3) is connected to the inlet of the brush filter (5), the heavy phase liquid outlet pipe is connected to the desander hopper (4), the outlet of the brush filter (5) is connected to the underflow pipe of the three-stage recovery hydrocyclone (6), and the pipes are connected together to the inlet of the first stage pump of the six-stage washing hydrocyclone (15).

3. The novel modified starch washing and recovery system according to claim 1, characterized in that, The feed pipe of the six-stage washing hydrocyclone (15) is equipped with a flow regulating device A, which includes a mass flow meter and a control regulating valve. It is connected to the OCC control room by a control line and automatically adjusts the feed rate according to the real-time operating conditions.

4. The novel modified starch washing and recovery system according to claim 1, characterized in that, The upper pipe of the first stage of the six-stage washing hydrocyclone (15) is connected to the inlet of the third stage pump of the three-stage recovery hydrocyclone (6), and the upper pipe of the next stage hydrocyclone is connected to the inlet of the pump of the previous stage hydrocyclone.

5. The novel modified starch washing and recovery system according to claim 1, characterized in that, The bottom pipe of the washing water tank (12) is connected to the inlet of the washing water pump (13), the outlet pipe of the washing water pump (13) is connected to the inlet of the water filter (14), and the outlet pipe of the water filter (14) is connected to the inlet of the sixth pump of the six-stage washing cyclone separator (15).

6. The novel modified starch washing and recovery system according to claim 1, characterized in that, The sixth-stage washing cyclone separator (15) is equipped with a flow regulating device B on its washing water pipe, which includes a flow meter and a self-control valve. It is connected to the OCC control room via a control line and automatically adjusts the washing water volume according to the real-time operating conditions.

7. The novel modified starch washing and recovery system according to claim 1, characterized in that, The discharge pipe of the six-stage washing hydrocyclone (15) is equipped with a mass flow rate regulating device C, which includes a flow meter and an automatic control valve. It is connected to the OCC control room by a control line and the discharge flow rate is adjusted and controlled according to the concentration of the discharge.

8. The novel modified starch washing and recovery system according to claim 1, characterized in that, The settling tank (7) is a two-stage series combination. The overflow pipe of the first-stage settling tank is connected to the inlet of the second-stage settling tank, and the bottom pipes of the first-stage and second-stage settling tanks are connected to the inlet of the recovery pump (8).

9. A novel modified starch washing and recovery system according to claim 1, characterized in that, The underflow outlet of the sixth stage washing hydrocyclone (15) is also provided with a pipeline connected to the upper inlet of the raw material tank (1), the bottom pipeline of the finished product tank (16) is connected to the inlet of the discharge pump (17), and the outlet pipeline of the discharge pump (17) is connected to the next process.

10. A novel modified starch washing and recovery system according to claim 1, characterized in that, The raw material tank (1) is equipped with an online level gauge (9) and an electric stirrer (11), as well as an online CIP cleaning nozzle (10).

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