JPH02142458A - Heat-treating system - Google Patents

Abstract

PURPOSE:To obtain the subject system capable of dealing one by one with functional mechanism of the system without modifying conventional construction so much by controlling a raw material-feeding pump according to flowing am ount of raw material in the fluid circuit and holding optimum flowing amount of the system. CONSTITUTION:The aimed system is constructed such as raw material Ml is fed from an organic raw material-feeding pump 11 in which extruding amount is affected to secondary pressure to a fluid circuit Lp1 capable of steeply varying viscosity of the raw material Ml by heat-treating and flowing amount of the raw material Ml flowing through the fluid circuit Lp1 is detected, then the pump 11 is controlled by signal Sd1 corresponding to said detected value, thus previously known optimum flowing amount of the treating system is held. For instance, a detector 1 is installed at lower stream of a heat exchanger 20 and rotating number of a motor 12 is controlled by detected signal Sd1 of the detec tor through a motor controller 14, then extrusion at optimum flowing amount from the pump 11 is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is suitable for use in heat treatment systems in the brewing industry, food processing industry, etc.

(mg) or a suspension-like (particle size of 100 mg or more) dispersion system, and a system that targets liquid raw materials of organic composition that often exhibit viscosity.

It relates to devices that are responsible for heating processes such as sterilization and denaturation.

(Conventional technology) One example of a heat treatment system in such a technical field is as follows.

As seen in Japanese Unexamined Patent Publication No. 61-228250, etc., it is configured to include a pump that feeds raw materials and a fluid circuit that heat-treats the raw materials supplied from the pump. The optimal raw material flow 1a in the system is known, and of course there is no objection to maintaining this, but in this case, if the system is modified too much, it will affect the final product, especially the taste. Good results cannot be expected because it is difficult to predict subtle changes in scent and fragrance, and it takes a long period of trial and error to reach a certain level.

Conventionally, pumps with relatively stable performance were selected and the optimal value for the discharge point was determined empirically.

I was limited to continuous operation with this value set.

(Problem to be Solved by the Invention) However, the stability of performance of such pumps is generally discussed on the assumption that the receiver of the 1M charge operates passively; If the pump pressure is forcibly changed, even if the pump itself is functioning normally within the given conditions, from the perspective of the entire system, it is undeniable that the discharge pipe will deviate from the set value. Furthermore, it is difficult to maintain an optimum flow rate for the raw material in the processing system, and variations in processing temperature inevitably lead to a decrease in yield.

In this regard, heat treatment systems in this field often perform heat treatment on the target raw material under conditions that can cause a relatively large change in viscosity, as seen in gelatinization of starch, for example.

This is equivalent to the fact that when viewed from outside the processing system, the fluid circuit can activate a pressure-active mechanism, which is the case with conventional methods.

This means that it is better to sit and wait for a lull in viscosity changes.

The present invention has been devised to effectively solve the problems in the conventional heat treatment system, and its purpose is to provide a system that is convenient for the active mechanism of the treatment system without having to modify the conventional configuration too much. The objective is to provide a heat treatment system that can cope with this.

(Means for Solving the Problems) In order to achieve the above object, the present invention detects the flow rate of raw material flowing through a fluid circuit, and controls the pump with a signal according to the detection style, thereby optimizing one processing system. Flow! (Action) According to the above means, it is practically equivalent to applying feed bank control to the pump, and therefore, forced stabilization of the discharge is possible, and moreover, it is necessary for the equipment configuration. Measures can be limited to installing a foot buff line.

(Example) The following 5 examples are based on the attached drawings, in which the present invention is applied to a heat treatment system of 11 indirect heating type, in which a heating medium is provided between a heat source and an object to be treated. A detailed explanation will be provided.

First, with reference to FIGS. 1 and 2, an example of a non-contact type system in which a heating medium is not brought into contact with a workpiece will be shown.

FIG. 1 is a flow diagram of a non-contact heat treatment system, and FIG. 2 is a vertical sectional view of a heat exchange unit that constitutes a fluid circuit of the system.

In the figure, Sl represents the entire non-contact heat treatment system, and the system Sl represents the liquid raw material M! ; This is for denaturing L by relatively gently heating it with hot water wh as a non-contact heating medium.The system consists of a supply system Sf that feeds the original 1M text as required; It is equipped with a processing system Spl that heat-processes the original 1M text, and if one additional equipment is added, it is equipped with a feed line Lf for supplying the stored raw material Ml to the hopper 10 under pressure through the feed pump 11, and hot water wh. A process line Lpl that heats the raw material Ml through the heat exchanger 20 as a heat medium and discharges the treated raw material Mp.
It is made up of.

The pump 11 includes an electric motor 12 that drives it,
The motor 12 is connected to a controller 14 via a lead wire 13.
It operates in response to a control signal Sc sent from.

Note that the control signal Sc is given as a layer pressure signal.

The motor 12 increases or decreases the rotation speed depending on the magnitude of the signal Sc,
When the signal Sc is constant, the number of revolutions is approximately inversely proportional to the load.On the other hand, when the controller 14 independently controls the motor 12, it causes the pump 11 to discharge the optimal flow rate if its secondary pressure is normal. It is assumed that it is set to obtain. Therefore, if the viscosity of the raw material Mu or Mp increases, the secondary pressure of the bomb 11 increases automatically, and the load increases, the magnitude of the signal Sc will return to the original set value (if controlled independently). Since the maintained temperature does not change, the discharge amount of the pump 11 decreases due to leakage, etc., and the optimum flow rate cannot be maintained.

The heat exchanger 20 is composed of horizontally placed units/tooths 21 stacked in multiple stages and connected in series. Each unit/tooth 21 has a straight inner tube 22 for conducting raw material and a straight inner tube 22 for conducting the raw material, as shown in FIG. Consisting of an outer tube 23 for conducting hot water coaxially surrounding the inner tube 22, a swirl plate 24 divides the flux into two diameter distributions during raw material distribution and shifts the phase by 180 degrees.
It is installed continuously over almost the entire length of.

In this embodiment, the detector l for detecting the flow rate of the raw material Mp actually flowing through the process line Lpl is installed on the downstream side of the heat exchanger 20, and the lead 1i12 transmitting the detection signal Sdl is connected to the motor controller 14. By connecting the control signal Sc to the controller and applying feedback control, the magnitude of the control signal Sc is increased or decreased as appropriate, thereby keeping the rotational speed of the motor 12 constant and causing the pump 11 to always discharge the optimum flow rate. .

Next, with reference to FIGS. 3 and 4, an example of a contact system in which a heating medium is brought into direct contact with a workpiece will be described.

Figure 3 is a flow diagram of the contact heat treatment system.

FIG. 4 is a longitudinal cross-sectional view of a steam injector constituting the fluid circuit of the system, in which parts similar to those of the previous embodiment are designated by the same reference numerals.

In the figure, S2 represents the entire contact heat treatment system, and the system S2 is for sterilizing liquid raw material Ml by directly mixing and contacting steam St as a heating medium and heating it relatively quickly. In terms of the system, the heating method of the processing system Sp2 is different, and in terms of equipment, the process line Lp2 is configured with a steam injector 40, and the raw material flow rate detection signal Sd2 is inputted to the controller 14 of the motor 12. This is different from the previous embodiment.

The injector 40 includes a raw material conduit 41, a steam header 42 parallel to this, and a plurality of inclined nozzles 43...
The flow rate of the steam St is suppressed to such an extent that the flow rate of the raw material in the process line LP2 is not erroneously detected.

Finally, an example of a contact/non-contact type heat treatment system will be described with reference to FIG.

FIG. 5 is a flow diagram of the same system, in which similar parts to the previous embodiment are designated by the same reference numerals.

In the figure, S3 represents the entire contact/non-contact thermal processing system, and one system S3 is located between the supply system Sf and the processing system Sp2 of the contact system S2.

The processing system SPI of the non-contact system S1 is interposed, and in terms of equipment, the feed line Lf and the process line Lp2 are connected in series by the process line Lpl, and the process line Lp2 located on the downstream side The raw material flow rate detection signal Sd2 is fed back to the controller 14. Note that if the temperature conditions and pressure conditions at the connection positions match, the connection order of the process lines LPI and Lp2 may be reversed, and the detection signal Sdl from the line Lpl may be fed back.

As described above, in any of the embodiments, the conventional configuration, that is, each system 51 except for the feedback system 1.
~ Processing system Spl, S without changing the configuration of S3 too much
The active mechanism of p2, that is, pushing up the secondary pressure of the pump 11 can be dealt with one by one.

Here, an example of a comparative experiment will be shown between the non-contact heat treatment system S1 and a conventional system from which the feedback system has been removed.

Skin Blood 1 Pump 11: Mono Pump 2NEL-20 Discharge Volume
s+am 1.2001/hr Heat exchanger manufactured by Heishin Gitsu Co., Ltd. 20 Number of stages, connection: 6 Setting row unit 21: Outer diameter 23 stacking length 1.25 ta 34 swirl plates detected if: ″rr1.Magnetic flow rate Total ME↑-Y44
2-CB-2F Controller 14 manufactured by Yamatake Honeywell Co., Ltd.: Digital indicator controller 0-42 manufactured by Yamatake Honeywell Co., Ltd. t Co [Shuttle raw material M sentence: Heat medium Wh: Heating conditions Raw material side: Heat medium side: Flower paste hot water temperature Inlet 40℃ Outlet 115℃ Temperature Inlet 150℃ Outlet 140℃ Flow rate 30 sentences/win Length 11 ■ Search system 51 Setting FL amount 2005 L/hr Heating flow rate 200 AC/hr Conventional system Set flow rate 200 AC/hr Heating flow fit 30 fL/hr Next, the performance test results of the contact heat treatment system S2 will be illustrated for two types of raw materials MsL.

1. Name: Flower paste (mixture of cornstarch, milk powder, condensed milk, skim milk powder, granulated sugar, vanilla essence, oil, water, etc.) Viscosity: Before treatment 3,000 CP (40℃) After treatment 80,000 CP (40℃) Temperature: Process entrance 40℃ Heat treatment 120℃ Processing amount: 200 cycles/hr Number of bacteria (cells/g) General viable bacteria: Before treatment 4,000 After treatment < 10 1 Heat-resistant bacteria: Before treatment 2,000 After treatment (
10 Escherichia coli: Before treatment (+) After treatment (-) News JLu Name: Custard cream (mixture of cornstarch, milk, egg yolk, skim milk powder, granulated sugar, vanilla essence oil, wood, etc.) Viscosity: Before treatment 3,000 After CP (40℃) treatment 10,000 CP (40℃) Temperature: Process entrance 40℃ Heat treatment 120℃ Processing amount: 200 cycles/hr Bacteria t! ! (pcs/g) General viable bacteria: Before treatment 4,000 After treatment <10 Heat resistant l! i: Before treatment After 2,000 treatments
<10 Colon LII: Before treatment (+) After treatment
(-) In the above embodiment, the controller 1 of the motor 12
It will be obvious that the details of the circuit No. 4 and its placement position can be selected as appropriate.

(Effects of the Invention) As is clear from the following explanation, according to the present invention, the flow rate of the raw material in the fluid circuit located in the treatment system of the heat treatment system is detected, and the pump is controlled with a signal according to the detected temperature. hand,
Since the optimum flow rate is maintained, the active mechanisms of the processing system can be dealt with one by one without much modification to the conventional configuration, and as a result, the processing temperature is stabilized and the yield is increased.

[Brief explanation of the drawing]

The drawings are of an embodiment in which the present invention is applied to a heat treatment system using a heating medium. Figure 1 is a flowchart of a non-contact system, and Figure 2 is a vertical cross-section of a heat exchange unit that constitutes the system. Fig. 3 is a flowchart of the contact type system, Fig. 4 is a longitudinal sectional view of a steam injector constituting the system, and Fig. 5 is a flowchart of the contact and non-contact type system. In the figure, 1 is a flow rate detector, 2 is a lead wire, 11 is a feed pump, 12 is a motor, 14 is a controller, 20
4. is a heat exchanger, 40 is a steam injector, Lf is a feed line, Lpl, Lp2 are process lines, and M is a liquid source 4. Mp is the processed raw material, Sl is the non-contact heat treatment system, S2 is the contact heat treatment system, S3 is the contact and non-contact heat treatment system, Sc is the control signal, Sdl,
Sd2 represents a detection signal, Sf represents a supply system, Spl and Sp2 represent a processing system, St represents steam, and Wh represents hot water. patent

Claims (5)

[Claims] (1) The pump is equipped with a pump that feeds a raw material having an organic composition, and a fluid circuit that can heat-treat the raw material supplied by the pump to relatively significantly change the viscosity of the raw material, and the pump has a discharge amount. In a heat treatment system in which the optimum raw material flow rate is known, the heat treatment depends on the secondary pressure, the flow rate of the raw material flowing through the fluid circuit is detected, the pump is controlled with a signal according to the detected flow rate, and the optimal flow rate is determined. Heat treatment system designed to maintain flow rate. (2) The heat treatment system according to claim 1, wherein the pump is driven by an electric motor, and the signal is fed back to a controller of the motor. (3) The heat treatment system according to claim 2, wherein the pump is a Mono pump. (4) The heat treatment system according to claim 1, wherein the fluid circuit includes a mechanism for causing the raw material and the heat medium to exchange heat with each other in a non-contact state. (5) The heat treatment system according to claim 1 or 4, wherein the fluid circuit includes a mechanism for bringing a heating medium into direct contact with the raw material.