CN201648269U

CN201648269U - Cyclone desander capable of controlling working pressure balance based on proportional-integral-derivative (PID)

Info

Publication number: CN201648269U
Application number: CN201020131775XU
Authority: CN
Inventors: 周庆锋; 师学良
Original assignee: INNER MONGOLIA NAILUN AGRICULTURAL SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: INNER MONGOLIA NAILUN AGRICULTURAL SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2010-02-10
Filing date: 2010-02-10
Publication date: 2010-11-24
Anticipated expiration: 2020-02-10

Abstract

The utility model discloses a cyclone desander capable of controlling working pressure balance based on proportional-integral-derivative (PID), which comprise a cyclone pipe, a sand collecting tank arranged at the lower part of the cyclone pipe, a tangential feeding pipe arranged at the upper part of the cyclone pipe, a top-flow discharge pipe arranged at the top of the cyclone pipe and a bottom-flow discharge pipe arranged at the lower part of the cyclone pipe, wherein the bottom-flow discharge pipe is communicated with the sand collecting tank. The cyclone desander further comprises a PID controller, a water intake pipe, a flow rate transducer and a control valve, wherein the water intake pipe is communicated with the sand collecting tank, the flow rate transducer and the control valve are arranged on the water intake pipe, the output terminal of the flow rate transducer is connected with the signal input terminal of the PID controller, the control signal output terminal of the PID controller is connected with the input terminal of the control valve. The utility model has the advantages of increasing the sand removal efficiency of the starch slurry cyclone desander during the process of producing refined starch from potato, corn and other crops, thereby reducing the ash content of the product and increasing purity and whiteness and other physicochemical indexes of the product.

Description

Utilize PID control operating pressure equilibrated hydrocyclone

Technical field:

The utility model provides a kind of separating device, and especially a kind of PID that utilizes of separating starch breast controls operating pressure equilibrated hydrocyclone.

Background technology:

In starch crops production processes such as potato, corn, be transported in the farm crop of factory, the soil property in the weather and the place of production is different during with results, can be mixed with impurity such as a certain amount of silt, weeds, stone.These farm crop enter next process after clean, but inevitably there are impurity such as micro-silt to be brought into the starch abstraction process during the course, can cause like this that finished product starch ash content index exceeding standard, spot increase, whiteness descends, so in the starch crops leaching process, add starch milk desanding unit, can be controlled in the reasonable range to guarantee the finished product index.The desanding unit all adopts the eddy flow desanding system, its desanding principle utilizes starch crops different with silt particle proportion and design, after starch paste or starch milk pump into the desanding swirler, because centrifugal action, discharge by underflow opening under cyclonic action than the heavy silt of starch, and starch granules and proportion will be discharged by overflow port less than the material of starch granules, so just require swirling flow unit that good work status must be arranged, could well remove and the approaching impurity such as silt of starch granules proportion like this.

Domestic existing yam starch production line desanding unit, the starch milk sand separator that uses, formed by 2 or a plurality of cyclone pipe, and be equipped with at the charging of swirler group and overflow port and regulate the hand valve, and at the no regulated valve of underflow outlet, it is that simple adjusting desanding swirler charging, the valve opening of overflow are adjusted the sand separator working order, and can not realize underflow pressure is not regulated, and will certainly influence the separating effect of swirler like this.

Summary of the invention:

It is a kind of for solving in the farm crop purified starch courses of processing such as potato, corn that the purpose of this utility model is to provide, improve starch milk desanding swirler desanding efficiency, control operating pressure equilibrated hydrocyclone with the PID that utilizes that reduces physical and chemical indexs such as product ash content, raising product purity and whiteness.

The utility model is implemented by following technical scheme: utilize PID control operating pressure equilibrated hydrocyclone, it comprises cyclone pipe, the long-pending husky jar of described cyclone pipe bottom, the tangential feed pipe on described cyclone pipe top, the top stream discharge nozzle at described cyclone pipe top, the underflow discharge nozzle of described cyclone pipe bottom, described underflow discharge nozzle is communicated with described long-pending husky jar, it also comprises the PID controller, water inlet pipe, flow transmitter and variable valve, described water inlet pipe is communicated with described long-pending husky jar, on described water inlet pipe, be provided with described flow transmitter and described variable valve, the output terminal of described flow transmitter is connected with the signal input part of described PID controller, the control signal output terminal of described PID controller is connected with the input terminus of described variable valve, described flow transmitter is sent to described PID controller with flow signal, described PID controller with the flow signal analyzing and processing after, control the aperture size of described variable valve, make the flow weighing apparatus in the described water inlet pipe fixed, reach efficient desanding effect to realize control cyclone pipe bottom discharge pressure.

Advantage of the present utility model: solve in the farm crop purified starch courses of processing such as potato, corn, improve starch milk desanding swirler desanding efficiency, to reduce the product ash content, to improve physical and chemical indexs such as product purity and whiteness.

Description of drawings:

Fig. 1 is an one-piece construction synoptic diagram of the present utility model.

Cyclone pipe 1, long-pending husky jar 2, tangential feed pipe 3, top stream discharge nozzle 4, underflow discharge nozzle 5, PID controller 6, water inlet pipe 7, flow transmitter 8, variable valve 9.

Embodiment:

As shown in Figure 1, utilize PID control operating pressure equilibrated hydrocyclone, it comprises cyclone pipe 1, long-pending husky jar 2 below the cyclone pipe 1, the tangential feed pipe 3 on cyclone pipe 1 top, the top stream discharge nozzle 4 at institute cylinder 1 top, the underflow discharge nozzle 5 of cyclone pipe 1 bottom, underflow discharge nozzle 5 is communicated with long-pending husky jar 2, it also comprises PID controller 6, water inlet pipe 7, flow transmitter 8 and variable valve 9, water inlet pipe 7 is communicated with long-pending husky jar 2, on water inlet pipe 7, be provided with flow transmitter 8 and variable valve 9, the output terminal of flow transmitter 8 is connected with the signal input part of PID controller 6, the control signal output terminal of PID controller 6 is connected with the input terminus of variable valve 9, flow transmitter 8 is sent to PID controller 6 with flow signal, PID controller 6 with the flow signal analyzing and processing after, the aperture size of regulating and controlling valve 9, make the flow weighing apparatus in the water inlet pipe 7 fixed, reach efficient desanding effect to realize control cyclone pipe bottom discharge pressure.

Principle of work: the water-in 7 that on long-pending husky jar, has added the adjustable throttle amount, and adopt PID controller 6 to regulate the flooding velocity of water-in 7 automatically, after starch milk enters cyclone pipe 1 by tangential feed pipe 3, the heavy particle of silt geometric ratio starch is discharged by underflow discharge nozzle 5 under cyclonic action, starch milk is then discharged by the top stream discharge nozzle 4 at cyclone pipe 1 top, original desanding swirler in this working process, can only realize the hydrocyclone working efficiency by regulating tangential feed pipe 3 pressure and top stream discharge nozzle 4 pressure, can change the pressure of underflow discharge nozzle 5, it is not thorough to cause starch loss or starch to separate with silt, bring silt into starch milk and enter next process, finally influence quality product.Rotational flow station after the improvement then can utilize the flooding velocity size of water-in 7 to control desanding swirler underflow pressure.So just can realize, utilization enters the flow of water inlet pipe 7 water and realizes meticulous adjusting desanding swirler underflow pressure, and when feed pressure changes in the production process, also can realize the underflow constant pressure, the proportion that makes falls into long-pending husky jar 2 greater than the silt of starch, and starch can not fall into, and makes the more purified starch milk of top stream discharge nozzle 4 delivery ratios.

Claims

1. utilize PID control operating pressure equilibrated hydrocyclone, it comprises cyclone pipe, the long-pending husky jar of described cyclone pipe bottom, the tangential feed pipe on described cyclone pipe top, the top stream discharge nozzle at described cyclone pipe top, the underflow discharge nozzle of described cyclone pipe bottom, described underflow discharge nozzle is communicated with described long-pending husky jar, it is characterized in that, it also comprises the PID controller, water inlet pipe, flow transmitter and variable valve, described water inlet pipe is communicated with described long-pending husky jar, on described water inlet pipe, be provided with described flow transmitter and described variable valve, the output terminal of described flow transmitter is connected with the signal input part of described PID controller, and the control signal output terminal of described PID controller is connected with the input terminus of described variable valve.