JPS63150399A - Production control of bulky granular detergent - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control method for continuously, homogeneously and stably producing high bulk density granular detergent obtained by kneading and crushing detergent raw materials.

[4] Currently, spray-dried products are the mainstream of laundry detergents on the market. This detergent is made into hollow particles with an average particle size of about 200 to 800 μm by spray drying.
The bulk density is as low as about 0.3 g/cc. However, spray-dried detergents are expensive to transport, require a considerable amount of space for storage and display, and are also difficult to store and weigh in general households.

In response, proposals have been made to solve the drawbacks of conventional spray-dried detergents and to create compositions and production methods for high-density granular detergents that can be cleaned with a small amount of detergent by concentrating them (
Japanese Unexamined Patent Publication No. 60-72998, No. 6 (1-72999)
No. 60-96698, No. 61-6989
No. 9, No. 61-76597).

However, when producing high bulk density granular detergents continuously, the intimate kneading process involves supplying raw material powder, adding a binder, and often involves neutralization reactions, which is extremely troublesome and complicated.
I operation is required. Furthermore, it is generally known that the physical properties of the intimate kneaded product obtained by this step affect the operating conditions of the subsequent crushing treatment and the quality of the final product.

However, the only way to understand its physical properties is to measure the various powder physical properties of the final product or use the five human senses, which are only qualitative. However, considerable time delays are inevitable.

Even in such a production method, if there is no change in the supply to the intimate kneading step, a tightly kneaded product with constant characteristics can always be obtained and no problems will occur. However, once a disturbance such as a change in raw material properties or a fluctuation in supply amount occurs, changes in the physical properties of the intimately kneaded product due to the disturbance will be recognized with a considerable time delay. During this time delay, a defective intimate mixture may be produced, or in the worst case, the equipment may be damaged or blocked, making production impossible.

The present invention is to detect changes in the physical properties of a tightly kneaded product due to external disturbances without any time delay, and to continuously and stably produce a homogeneous high bulk density granular detergent.

The method for controlling the production of a high bulk density granular detergent of the present invention includes supplying solid raw materials and liquid raw materials as detergent raw materials to a kneading machine through a raw material supply system to obtain a kneaded product, and When feeding materials to a crusher and crushing them to continuously produce high bulk density granular detergent,
The properties of the kneaded material are grasped by detecting at least one of the output from the kneading machine and the output from the crushing machine, and when the detected value deviates from a predetermined range, the raw material supply system or the crushing machine is Alternatively, the present invention is characterized in that both of these operating conditions are corrected.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of the manufacturing control method of the present invention. Powder detergent raw material is supplied from the powder raw material feeder 11.

Further, the liquid detergent raw materials are supplied from the pumps 13 to the intimate kneading machines 15, respectively. The powder raw material feeder 11 and the pump 13 are each provided with a transmission 31; 33. Examples of raw materials for powder detergents include spray-dried detergent ingredients and builders, and raw materials for liquid detergents include neutralized products of nonionic surfactants and anionic surfactants6. It can also be carried out within the kneading machine 15. The intimate kneading machine 15 is equipped with a thermometer 41 for measuring the temperature of the cooling water. A motor load fluctuation detector 45 and a pressure gauge 43 for measuring the discharge pressure of the kneaded material are attached.

The intimate kneading material discharged from the intimate kneading machine 15 is sent to the crusher 1.
7 to crush into granules. At this time, the crushing aid is added by the crushing aid feeder 19. 35 is a transmission of this supply machine 19.

Cooling air is taken into the crusher 17 from the line 16,
It is discharged from line 18. 37 is an intake air adjustment valve that controls the intake amount of cooling air. 47 is a thermometer that measures the temperature of the discharged air. The motor 2o of the crusher 17 is provided with a motor load fluctuation detector 49 and a transmission 39.

From the crushed material obtained by the crusher 17, fine particles having a predetermined particle size or less are cut by a classifier 21, and at the same time, the mass of the fine particles is detected by a weighing scale 51. In addition, the crushed material with fine particles cut in this way is
3, the bulk density is detected and sent to the finishing process.

53 indicates a weighing scale. In the finishing process, if necessary, the particles are sized, coated with water-insoluble fine powder, etc.
The final product is a high bulk density granular detergent.

From the intimate kneading machine 15, due to changes in the physical properties of the intimately kneaded material, variations in the motor load, changes in the temperature of the hot cooling water, and changes in the discharge pressure at the discharge port occur, and a motor load variation detector 45, a thermometer 41. Each output change is detected by the pressure gauge 43. At the same time, motor load fluctuations and intake air temperature changes also occur from the crusher 17, and the motor load fluctuation detector 49. A thermometer 47 detects each output change. Furthermore, the amount of fine particles generated is detected by a weighing scale 51, and the bulk density of the finally obtained crushed material is measured by a BD measuring device 6. The detected output signal is inputted to a computer 25. It is.

By calculating the changes in the total output over each arbitrary fixed period and the combination thereof, changes in the physical properties of the intimate kneading material and their influence on the final product can be instantly grasped.

In this production control system, if no problems occur in the raw material supply system, by maintaining the initially set operating conditions, the physical properties of the resulting intimate mixture will be equal to the target values! A dense kneaded product can be produced continuously and stably, and if this is crushed under set conditions, a homogeneous high bulk density granular detergent can be produced.

In addition, even if a disturbance occurs in the raw material supply system for some reason and the physical properties of the intimately kneaded material differ from the target values, problems can be avoided in the crushing process by correcting the raw material supply system and crushing operation conditions according to the characteristics. It is possible to produce a homogeneous high bulk density granular detergent without causing any problems. That is, in accordance with the manufacturing conditions of the target high bulk density granular detergent and detergent mixture, the optimum output sum obtained in each arbitrary fixed period is memorized, and each detected output sum is brought closer to that value. By setting the raw material supply conditions and crushing treatment conditions, the target high bulk density granular detergent intimately kneaded product can be obtained. Here, the detected output signals are wide-ranging as described above, but considering the following two points, it is preferable to control the operating conditions by the output signals from the nine-density kneading machine 15 or the crushing machine 17. be.

■The key point is whether or not the properties of the intimately kneaded product can be consistently obtained, which allows the crusher to operate stably and, in turn, produce a homogeneous crushed product.

■When measuring the bulk density, particle size distribution, angle of repose, etc. of crushed materials, the time delay increases accordingly.

When a disturbance occurs in the raw material supply system and the resulting intimate kneading material becomes softer than the set value, the motor load from the intimate kneading machine 15 decreases, the temperature of the cooling water rises less, and the kneading material becomes softer than the set value. discharge pressure becomes smaller. Furthermore, as for the output from the crusher 17, the motor load increases and the rise in cold air temperature decreases. On the other hand, if the intimate kneading material becomes harder than the set value due to disturbances in the material supply system, an output in the opposite direction to the above will be obtained.

At least one of the output signal from the intimate kneading machine 15 or the output signal from the crusher 17 is detected, and the operating conditions of the raw material supply system or the crusher are corrected accordingly. Preferably, both at least one output signal from the compact kneader 15 and at least one output signal from the crusher 17 are detected.

When both fluctuate in the same direction, the operating conditions of the raw material supply system or the crusher are corrected.

In the raw material supply system, by increasing the ratio of liquid raw materials, the obtained kneaded product can be made soft, and by decreasing the ratio, it can be made hard. Although it is possible to adjust the supply amount of the powder raw material, it is easier to control by adjusting the supply amount of the liquid raw material. The amount of liquid raw material supplied can be controlled by a transmission 33 attached to the pump 13. Further, the supply amount of the powder raw material is adjusted by a transmission 31 attached to the supply machine 11.

Furthermore, even if the properties of the tightly kneaded material supplied vary somewhat, a homogeneous crushed material can be obtained by correcting the operating conditions of the crusher 17. If the intimate kneading material becomes softer than a predetermined value, one or more of the following may be used in combination, and if it becomes hard, correction may be performed in the opposite direction.

(2) The operating speed of the crusher 17 is increased by the transmission 39.

, the intake air adjustment valve 37 increases the amount of cooling air taken into the crusher 17.

(2) The amount of crushing aid supplied to the crusher 17 is increased by the transmission 35.

FIG. 2 is a flowchart of intimate kneading and crushing process control. First, close kneading 1115. Upper limit value of total motor load output obtained from crusher I7 Max K, Max D
, classifier 21, amount of fine powder obtained from BD measurement z323,
A bulk density output total target value PC1PB and capacity W are set. An arbitrary amount of raw material is supplied at a raw material supply ratio calculated in advance, and detection of each output signal is started. Fine powder amount, bulk density output sum value, Tc(n), Ta(n
) satisfies Tc(n)<PC, TB>PB, but each motor load output total value Tk(.),
T o, n) is T+c(n)<Max K, T
It is determined whether D(n)<Max D is satisfied, and if not, the operation of changing the crushing operation conditions and setting a new raw material supply ratio is continued until the condition is satisfied. The detected output sum values at the time when this condition is satisfied are stored as optimal output sum values Tc, TB, . . . . Next, the detected output sum value, especially the intimate kneading machine 1
5. Tk(n), TDCn detected from the crusher 17
, and if they are not satisfied, the operation of changing the crushing operation conditions and setting a new raw material supply ratio is continued until the values are satisfied. The respective detected output sum values at the time when this condition is satisfied are newly calculated as the optimum output sum values Tc, TB...
Re-memorize as...

The contents of each symbol in FIG. 2 and the optimum output sum value are listed below.

MaxK: Intense kneading machine motor load output total upper limit value MaxD: Crusher motor load total output upper limit value W:
Capacity target value Pc: Fine powder amount output total target value Ps: BD output total target value Tk: Optimal intimate kneading machine motor load output total value To: Optimal crusher motor load output total value TC: Optimal fine powder amount output total value TB: Optimal bulk density output total value Ti+: Optimal cooling water temperature output total value Tp: Optimal discharge pressure output total value T, : Optimal intake air discharge temperature output total sum Tk (.)
: Close kneading machine motor load output total value TO (n) : Crusher motor load output total value Tc (.): Fine powder amount output total value Ta (n): Bulk density output total value Ttz (.): Cooling water temperature Output total value TP(.): Exhaust pressure output total value TO(n): Intake air exhaust temperature output total value After each initial optimum output is stored as total value Tc, T,... , Tk(n), To(n), TV(n), TP(
. ) and Tc(n), the operating conditions of the raw material supply system and/or the crusher are corrected. This is because the detected values Tfl(n) and Tc(.) after the crushing process alone have a large response time delay and cannot quickly follow disturbances in the raw material supply system. In particular, the detected values of Tk(n) and To(n) are important for sudden and rapid disturbances in the raw material supply system. For example, if a sudden disturbance occurs such as the supply of raw material powder completely disappearing, in the worst case,
There are problems such as the crusher being blocked and production not being possible, but from the values of Tk(n), T, (.), Ma
If it is expected that Ttl(.) exceeding xD is detected, measures can be taken in advance such as removing the problem-prone intimate kneading material in front of the input port of the crusher 17.

Table 1 shows the respective output sum values Tk(.), TO(n)... compared with the optimal output sum values Tk, To...
This is an example of the difference between ..., the crushing operation conditions at that time, and the method of converting and outputting the raw material supply ratio. Since the total value changes, it cannot be uniformly determined for all, but the positive or negative of the output can be determined in this way. Case 1 corresponds to when the intimate kneading material becomes harder than the set value, and case 2 corresponds to when it becomes softer.

(Left below) According to the present invention, when producing a high bulk density granular detergent using a solid raw material and a liquid raw material as detergent raw materials through a kneading process and a crushing process, the output from the kneading machine or the crushing machine can be reduced. By detecting at least one of these and correcting the operating conditions of the raw material supply system or the crusher accordingly, one can almost immediately eliminate the production of products with poor composition or poor physical properties, and as a worst-case scenario. Blockage and damage within the device can be avoided, and high bulk density granular detergent can be produced continuously, stably and uniformly. Particularly in detergent manufacturing processes aimed at mass production, this method is indispensable as it allows control with a small number of detection items.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of the present control method. FIG. 2 is a flowchart illustrating the one-line control method. 11... Powder raw material feeder 13... Pump 15...
・Intense kneading machine 17...Crushing machine 19...Crushing aid supply machine 21...Classifier Figure 2 Start procedure amendment 1. Description of the case 19861 Patent Application No. 298454 2 Title of the invention Method for controlling the production of high bulk density granular detergent 3 Person making the amendment Relationship to the case Patent applicant 1-3-7 Honjo, Sumida-ku, Tokyo (676) Lion Co., Ltd. Representative Atsushi Kobayashi 4, Agent telephone: Tokyo (293) 2715 6. Contents of the amendment (1) rT++J on page 11, line 6 of the specification has been changed to r
TR(.)”. (2) Correct Figure 2 as attached. 7. Attached document catalog drawing (Figure 2) 1 or more copies

Claims (1)

[Claims] 1. A solid raw material and a liquid raw material as detergent raw materials are supplied to a kneading machine through a raw material supply system to obtain a kneaded product, and the kneaded product is supplied to a crusher and crushed to continuously produce a high bulk density. When manufacturing granular detergent, the properties of the kneaded product are grasped by detecting at least one of the output from the kneading machine and the output from the crushing machine, and when the detected value deviates from a predetermined range, A method for controlling the production of a high bulk density granular detergent, comprising correcting the operating conditions of a raw material supply system, a crusher, or both.