阅读说明：本技术 制糖蒸发智能控制系统 (Intelligent sugar-making evaporation control system ) 是由 李松 梁雨曦 朱少华 欧阳希斐 于 2019-10-22 设计创作，主要内容包括：本申请公开了一种制糖蒸发智能控制系统,包括1#-6#蒸发罐、糖浆平衡箱和冷凝器,通过在连接管道上设置若干液位计和若干控制阀、在末端蒸发罐顶部装设有压力传感器以及在糖浆平衡箱上设有锤度计,上述元件通过信号电缆与DCS系统连接,当DCS系统接收到液位计发出液位信号之后,DCS系统输出信号控制控制阀的开度,保持1#-6#蒸发罐中液位的稳定。本申请能实现蒸发工段的无人化操作,降低人工成本,得到锤度稳定的糖浆,不但提高了产品的品质,而且能减小蒸汽能耗损失,实现节能减排。(The application discloses sugaring evaporation intelligence control system, including 1# -6# evaporating pot, syrup balance box and condenser, through set up a plurality of level gauges and a plurality of control valve on the connecting tube, installed pressure sensor and be equipped with the hammer meter on the syrup balance box at terminal evaporating pot top, above-mentioned component passing signal cable and DCS headtotail, after the DCS system received the level gauge and sent the level signal, the aperture of DCS system output signal control valve, keep the stability of liquid level in the 1# -6# evaporating pot. The application can realize unmanned operation of an evaporation section, reduce labor cost, obtain syrup with stable brix, improve product quality, reduce steam energy consumption loss and realize energy conservation and emission reduction.)

1. An intelligent sugar-making evaporation control system is characterized by comprising 1# -6# evaporation tanks (27, 28, 29, 30, 31, 32); a syrup balance box (34) and a condenser (33), wherein the clear juice pipeline (1) is respectively connected with an inlet and an outlet which are positioned at the bottom of the No. 1-6 evaporating pot (27, 28, 29, 30, 31, 32), the clear juice pipeline (1) is connected with the syrup balance box (34), and clear juice finally flows into the syrup balance box (34) through the clear juice pipeline (1) and is conveyed to the next working section through a pipeline (14);

the juice steam pipelines (3) are respectively connected to the juice steam outlets below the right sides of the No. 1-6 evaporating tanks (27, 28, 29, 30, 31 and 32); wherein the juice steam pipeline (3) is connected with the clear juice pipeline (1);

the steam inlet pipeline (15) is respectively connected to steam pipe inlets on the lower left sides of the 1# -6# evaporating tanks (27, 28, 29, 30, 31 and 32);

the steam outlet pipelines (20) are respectively connected with steam outlets at the tops of the 1# -6# evaporating tanks (27, 28, 29, 30, 31 and 32) and are finally connected to the condenser (33) together;

the condensed water is connected to the condenser (33) through a condensed water pipeline (26).

2. The sugar-making evaporation intelligent control system according to claim 1, characterized in that: manual valves (35) are respectively arranged on the clear juice pipeline (2), the manual valves (35) are respectively arranged on the steam inlet pipelines (15) of the No. 3 evaporating pot (29) and the No. 4 evaporating pot (30), and the manual valves (35) are arranged on the condensed water pipeline (26).

3. The sugar-making evaporation intelligent control system according to claim 1, characterized in that: the brix of the syrup in the syrup balance box (34) is between 60 and 70 degrees Bx.

4. The sugar-making evaporation intelligent control system according to claim 1, characterized in that: the brix of the syrup in the syrup balance box (34) is 65 degrees Bx.

5. The sugar-making evaporation intelligent control system according to claim 1, characterized in that: liquid level meters (44) are respectively arranged at the bottoms of the 1# -6# evaporating tanks (27, 28, 29, 30, 31 and 32); a hammeter (51) is arranged on the syrup balance box (34); a pressure sensor (50) is arranged at the top of the No. 6 evaporating pot (32);

control valves (52) are respectively arranged on the clear juice pipelines (2); control valves (52) are respectively arranged on steam inlet pipelines (15) of a No. 3 evaporating pot (29) and a No. 4 evaporating pot (30), and the control valves (52) are arranged on a condensed water pipeline (26);

the liquid level meter (44), the control valve (52), the pressure sensor (50) and the hammermill (51) are connected with the DCS system through signal cables;

the control process comprises the following steps:

firstly, after other production links are provided, an operator starts the DCS system, and after the DCS system receives a liquid level signal sent by a liquid level meter (44), the DCS system outputs a signal to control the opening of a control valve (52) and keep the liquid level in 1# -6# evaporating tanks (27, 28, 29, 30, 31 and 32) stable;

when the liquid level meter (44) detects that the liquid level signal in the evaporation tank is too high, the DCS sends a signal to open the large control valve, and when the liquid level meter (44) detects that the liquid level signal in the evaporation tank is too low, the DCS sends a signal to close the small control valve;

the DCS system controls the opening of a control valve (58) on a condensed water pipeline (26) according to a signal transmitted by a pressure sensor (50) arranged on a No. 6 evaporating pot (32) to keep the stability of the vacuum degree: when the detected pressure signal is overlarge, the DCS sends a signal to close a control valve (58) so as to reduce the flow of condensed water; when the detected pressure signal is too small, the DCS sends a signal to open a large control valve (58) to increase the flow of condensed water;

and thirdly, the DCS controls the opening degree of a control valve (58) on a steam inlet pipeline (15) of the 3# evaporating pot (29) and the 4# evaporating pot (30) according to a signal transmitted from a hammermieter (51) arranged on the syrup balancing box (34), so that the output syrup hammermiss value is stabilized at a set value: when the detected brix is smaller than a set value, the DCS sends a signal to open a large control valve (58) to increase the steam flow; when the detected brix is larger than a set value, the DCS sends a signal to close the control valve (58) to reduce the steam flow.

Technical Field

The invention relates to the technical field of white granulated sugar preparation, in particular to an intelligent sugar-making evaporation control system.

Background

The sugar industry is the basic industry of the food industry, is the raw material industry of various products such as paper making, chemical industry, fermentation, medicine, building materials, furniture and the like, and plays an important role in national economy.

The evaporation system is the core of the refining workshop and is also a node linked with the boiler workshop and the squeezing workshop. The domestic research on the control application of the multi-effect evaporation system is obviously lagged behind abroad. The dynamic process control of the industrial system is researched as early as 1999 abroad, models which can dynamically reflect system characteristics such as a neural network model and a generalized prediction model are established, the control strategy of the system is further researched, and the simulation effect is good. The related research in China starts late, the research on the aspect also aims at the simple evaporation system, the built model is also simple discretization dynamic decomposition of a steady-state mathematical model or linear logic control on some key values of the system on the assumption premise, and the method has certain constraint.

In the sugar manufacturing process of a sugar refinery, an evaporation section is the section with the largest steam consumption in all production lines. According to the process requirements, the clear juice passes through an evaporation section, and syrup with 65-degree Bx is finally obtained. Traditional evaporation workshop section all is manual operation, because the hammer data of syrup can't obtain real-time supervision, the manual operation inaccuracy, the syrup hammer can't obtain guaranteeing, makes the steam consumption of equipment increase.

Disclosure of Invention

The invention aims to provide an intelligent sugar-making evaporation control system, which can realize unmanned operation of an evaporation section, reduce labor cost, obtain syrup with stable brix, improve the quality of products, reduce steam energy consumption loss and realize energy conservation and emission reduction.

The invention is realized by the following technical scheme:

an intelligent sugar-making evaporation control system comprises a 1# -6# evaporation tank; the syrup balance box and the condenser are respectively connected with an inlet and an outlet at the bottom of the No. 1-6 evaporating pot, the clear juice pipeline is connected with the syrup balance box, and clear juice finally flows into the syrup balance box through the clear juice pipeline and is conveyed to the next working section through a pipeline;

the juice steam pipelines are respectively connected to the juice steam outlets below the right sides of the No. 1-No. 6 evaporating tanks; wherein the juice steam pipeline of the No. 1-6 evaporating pot is respectively connected with the clear juice pipeline;

the steam inlet pipeline is respectively connected to the steam pipe inlets on the lower left side of the 1# -6# evaporating pots;

the steam outlet pipelines are respectively connected with the steam outlets at the tops of the 1# -6# evaporating pots and are finally connected to the condenser together;

the condensed water is connected into the condenser through a condensed water pipeline.

It should be further noted that manual valves are respectively installed on the juice pipes, manual valves are respectively installed on the steam inlet pipes of the 3# evaporating pot and the 4# evaporating pot, and manual valves are respectively installed on the condensed water pipes. The most common manual operation is performed.

It is further noted that the brix of the syrup in the syrup balance box is maintained between 60-70 Bx.

It is further noted that the brix of the syrup in the syrup balance box is set to 65 Bx.

It is further explained that a liquid level meter is respectively arranged at the bottom of the 1# -6# evaporating pot; a hammeter is arranged on the syrup balance box; a pressure sensor is arranged at the top of the No. 6 evaporating pot;

control valves are respectively arranged on the clear juice pipelines; control valves are respectively arranged on steam inlet pipelines of the No. 3 evaporating pot and the No. 4 evaporating pot, and the control valves are arranged on condensed water pipelines;

the liquid level meter, the control valve, the pressure sensor and the hammermill are connected with the DCS through signal cables;

the control process comprises the following steps:

firstly, after other production links are provided, an operator starts the DCS, and after the DCS receives a liquid level signal sent by a liquid level meter, the DCS outputs a signal to control the opening of a control valve so as to keep the liquid level in the 1# -6# evaporating pot stable;

when the liquid level meter detects that a liquid level signal in the evaporation tank is too high, the DCS sends a signal to open the large control valve, and when the liquid level meter detects that the liquid level signal in the evaporation tank is too low, the DCS sends a signal to close the small control valve;

the DCS system controls the opening of a control valve on a condensed water pipeline to keep the stability of the vacuum degree according to a signal transmitted by a pressure sensor arranged on the 6# evaporating pot: when the detected pressure signal is too large, the DCS sends a signal to close the control valve, and the flow of condensed water is reduced; when the detected pressure signal is too small, the DCS sends a signal to open a large control valve to increase the flow of condensed water;

the DCS system controls the opening of the control valve on the steam inlet pipeline of the 3# evaporating pot and the 4# evaporating pot according to a signal transmitted by a hammeter arranged on the syrup balancing box, so that the output syrup hammerhead value is stabilized at a set value: when the detected brix is smaller than a set value, the DCS sends a signal to open a large control valve to increase the steam flow; when the detected brix is larger than a set value, the DCS sends a signal to close the control valve, and the steam flow is reduced.

The evaporating pot of this scheme is not limited to 6, can reduce or increase as required, can set up according to the principle of this application scheme.

The invention has the advantages that:

1. the sugar-making evaporation intelligent control system can realize unmanned operation of an evaporation section, reduce labor cost and obtain syrup with stable brix, thereby not only improving the quality of products, but also reducing the loss of steam energy consumption and realizing energy conservation and emission reduction;

2. when the production is normal, the automation and intellectualization of unmanned intervention operation are realized, the production process is kept at a better high-efficiency and low-energy consumption level, and the method plays a positive role in green, low-carbon and cyclic development of the sugar industry and improvement of comprehensive benefits;

3. the controller adopts a DCS system, so that the system is intuitive, simple to operate and small in maintenance amount;

4. the system has low cost, less material consumption and high yield, and can bring huge economic and energy-saving and emission-reducing benefits to the whole industry if being popularized and used in the sugar industry of China.

Drawings

FIG. 1 is a process equipment diagram of the sugar production evaporation intelligent control system of the invention;

FIG. 2 is a control circuit diagram of the sugar production evaporation intelligent control system of the invention;

wherein, the reference numbers and names in the figures are: 1-clear juice pipe; 3-a juice vapor pipe; 14-a pipeline; 15-a steam inlet conduit; 20-a steam outlet conduit; 26-condensed water pipeline; 27-1# evaporator; 28-2# evaporator; 29-3# evaporator; 30-4# evaporator; 31-5# evaporator; 32-6# evaporator; 33-a condenser; 34-a syrup balancing box; 35-manual valve; 44-a liquid level meter; 50-a pressure sensor; 51-hammertometer; 52-control valve.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, the intelligent sugar-making evaporation control system is characterized by comprising a # 1 evaporation tank 27; 2# evaporator 28; 3# evaporating pot 29; 4# evaporating pot 30; 5# evaporator tank 31; # 6 evaporator tank 32; a syrup balance box 34 and a condenser 33, wherein the clear juice pipeline 1 is respectively connected to an inlet and an outlet at the bottom of the No. 1-6 evaporating pot, the clear juice pipeline 1 is connected with the syrup balance box 34, and clear juice finally flows into the syrup balance box 34 through the clear juice pipeline 1 and is conveyed to the next working section through a pipeline 14;

the juice steam pipelines 3 are respectively connected to the juice steam outlets below the right sides of the No. 1-No. 6 evaporating tanks; wherein the juice steam pipeline 3 is connected with the clear juice pipeline 1;

the steam inlet pipeline 15 is respectively connected to the steam pipe inlets on the lower left side of the 1# -6# evaporating pots;

the steam outlet pipelines 20 are respectively connected with steam outlets at the tops of the No. 1-No. 6 evaporation tanks and are finally connected with the condenser 33 together;

the condensed water is introduced into the condenser 33 through the condensed water pipe 26.

It should be further noted that manual valves 35 are respectively installed on the juice pipes 2, manual valves 35 are respectively installed on the steam inlet pipes 15 of the 3# evaporating pot 29 and the 4# evaporating pot 30, and manual valves 35 are installed on the condensed water pipes 26; the manual valve can be installed to facilitate manual intervention when the system is in fault or maintenance.

The brix of the syrup in the syrup balance box 34 is between 60-70 Bx.

The brix of the syrup in the syrup balance box 34 is 65 Bx.

As shown in fig. 2, level meters 44 are respectively installed at the bottoms of the # 1 evaporator tank 27, the # 2 evaporator tank 28, the # 3 evaporator tank 29, the # 4 evaporator tank 30, the # 5 evaporator tank 31 and the # 6 evaporator tank 32; a hammeter 51 is arranged on the syrup balance box 34; a pressure sensor 50 is arranged at the top of the No. 6 evaporation tank 32;

the control valves 52 are respectively arranged on the clear juice pipelines 2; control valves 52 are respectively arranged on the steam inlet pipelines 15 of the 3# evaporating pot 29 and the 4# evaporating pot 30, and the control valves 52 are arranged on the condensed water pipeline 26;

the level gauge 44, the control valve 52, the pressure sensor 50 and the hammer gauge 51 are connected to a DCS system (not shown) via signal cables;

the control process comprises the following steps:

firstly, after other production links are provided, an operator starts the DCS system, and after the DCS system receives a liquid level signal sent by the liquid level meter 44, the DCS system outputs a signal to control the opening of the control valve 52, so that the liquid levels in the 1# evaporation tank 27, the 2# evaporation tank 28, the 3# evaporation tank 29, the 4# evaporation tank 30, the 5# evaporation tank 31 and the 6# evaporation tank 32 are kept stable;

when the liquid level meter 44 detects that the liquid level signal in the evaporation tank is too high, the DCS sends a signal to open the large control valve, and when the liquid level meter 44 detects that the liquid level signal in the evaporation tank is too low, the DCS sends a signal to close the small control valve;

the method specifically comprises the following steps:

when the liquid level meter 44 detects that the liquid level signal in the 1# evaporation tank is too high, the DCS system sends a signal to open the large control valve 52, and when the liquid level meter 44 detects that the liquid level signal in the 1# evaporation tank is too low, the DCS system sends a signal to close the small control valve 52;

when the liquid level meter 44 detects that the liquid level signal in the 2# evaporation tank is too high, the DCS system sends a signal to open the large control valve 52, and when the liquid level meter 44 detects that the liquid level signal in the 2# evaporation tank is too low, the DCS system sends a signal to close the small control valve 52;

when the liquid level meter 44 detects that the liquid level signal in the 3# evaporation tank is too high, the DCS system sends a signal to open the large control valve 52, and when the liquid level meter 44 detects that the liquid level signal in the 3# evaporation tank is too low, the DCS system sends a signal to close the small control valve 52;

when the liquid level meter 44 detects that the liquid level signal in the 4# evaporation tank is too high, the DCS system sends a signal to open the large control valve 52, and when the liquid level meter 44 detects that the liquid level signal in the 4# evaporation tank is too low, the DCS system sends a signal to close the small control valve 52;

when the liquid level meter 44 detects that the liquid level signal in the 5# evaporation tank is too high, the DCS system sends a signal to open the large control valve 52, and when the liquid level meter 44 detects that the liquid level signal in the 5# evaporation tank is too low, the DCS system sends a signal to close the small control valve 52;

when the liquid level meter 44 detects that the liquid level signal in the 6# evaporation tank is too high, the DCS system sends a signal to open the large control valve 52, and when the liquid level meter 44 detects that the liquid level signal in the 6# evaporation tank is too low, the DCS system sends a signal to close the small control valve 52;

the DCS system controls the opening of a control valve 58 on the condensed water pipeline 26 according to a signal transmitted by a pressure sensor 50 arranged on the No. 6 evaporating pot 32 to keep the vacuum degree stable: when the detected pressure signal is too large, the DCS sends a signal to close the control valve 58, and the flow of the condensate water is reduced; when the detected pressure signal is too small, the DCS sends a signal to open the large control valve 58 to increase the flow of condensed water;

the DCS system controls the opening of the control valve 58 on the steam inlet pipeline 15 of the 3# evaporating pot 29 and the 4# evaporating pot 30 according to the signal transmitted by the hammermimeter 51 arranged on the syrup balancing box 34, so that the output syrup hammermill value is stabilized at a set value: when the detected brix is smaller than the set value, the DCS sends a signal to open the large control valve 58 to increase the steam flow; when the detected brix is larger than the set value, the DCS sends a signal to close the control valve 58, reducing the steam flow.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.