Automatic control device for particle size of spray-dried product

Abstract

The utility model discloses a device for automatically controlling the particle size of a spray-dried product, which comprises a drying tower with an atomizer mounted at the top; the material receiving and filtering device is connected with the drying tower through an air pipe; the detection opening is formed in any one or more of the drying tower, the air pipe or the material receiving and filtering device, and the detection opening is provided with a lens; and the online particle size analyzer is used for scanning and detecting particles of the dried product, is mounted on the outer side of the detection opening and is connected with the atomizer. The automatic control device for the particle size of the spray-dried product can monitor the particle size of the spray-dried product in real time, and can adjust the operation parameters of the atomizer in time according to the monitoring result so as to adjust the particle size of the spray-dried product.

Description

Technical Field

[0001] The utility model relates to the field of spray drying, in particular to an automatic control device for the particle size of a spray drying product. Background Art

[0002] Spray dryers are widely used in various industries, including traditional Chinese medicine, precision ceramics, ferrites, cemented carbide, battery materials, soy protein isolate, collagen, condiments, pesticides, etc. At present, the atomizer speed in almost all spray dryer operation processes is constant, and the inlet air temperature, exhaust air temperature, and feed rate are mutually linked and adjusted. The particle size of the dried product particles is mainly determined by the atomizer speed, and fluctuations in other parameters will also have an impact on it. At present, the detection of the particle size of the dried product particles is usually laboratory offline. The usual steps are to manually sample the product during production operation, send the sample to the laboratory for analysis, adjust the operating parameters based on the analysis results, and re-sample and re-test when the operation is stable. If the process requirements are not met, the operating parameters need to be adjusted again and sampling is required. This method of controlling the particle size of the dried product particles is inefficient, there are errors in the operation measurement, and it is impossible to detect unqualified products in time. Utility Model Content

[0003] In order to overcome the defects of the prior art, an automatic control device for the particle size of a spray-dried product is provided, which can solve the problems of low efficiency of the control method for the particle size of the dried product and errors in operation and measurement.

[0004] In order to achieve the above technical effects, the solution provided by the utility model is to provide an automatic control device for the particle size of a spray-dried product, which comprises:

[0005] Drying tower with atomizer installed on top;

[0006] A material collecting and filtering device connected to the drying tower through an air duct;

[0007] A detection port is installed on any one or more of the drying tower, the air duct or the material receiving and filtering device, and the detection port is equipped with a lens;

[0008] An online particle size analyzer for scanning and detecting particles of the dry product is installed outside the detection port, and the online particle size analyzer is connected to the atomizer.

[0009] Preferably, the lens is a cross-talk transformable lens.

[0010] Preferably, a PLC controller is further included, wherein the PLC controller is connected between the online particle size analyzer and the atomizer, and the online particle size analyzer and the atomizer are program-interlocked via the PLC controller.

[0011] Preferably, the material collecting and filtering device is composed of one or more of a cyclone separator, a bag dust collector, a water film dust collector, and a washing adsorber connected in series.

[0012] The beneficial effect of the utility model is that the automatic control device for the particle size of a spray-dried product of the utility model is equipped with a lens by installing a detection port on any one or more of the drying tower, the air duct or the material collection and filtering device, so that the laser emitted by the online particle size analyzer can pass through the lens to scan and detect the dry product particles inside the lens, and the detection data is generated and sent to the PLC in real time. After analysis by the PLC, the operating parameters of the atomizer are adjusted to change the particle size of the product particles, so as to achieve real-time monitoring of the particle size of the spray-dried product, and the operating parameters can be adjusted autonomously according to the difference between the real-time data and the ideal value, so that the particle size of the spray-dried product gradually approaches the ideal value and finally stabilizes at the ideal value. The automatic control device for the particle size of a spray-dried product of the utility model can monitor the particle size of the spray-dried product in real time, and timely adjust the operating parameters of the atomizer according to the monitoring results to change the particle size of the product particles, thereby improving the control efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is an overall schematic diagram of the automatic control device for the particle size of the spray drying product of the utility model.

[0015] The corresponding relationship of the numbers in the figure is as follows:

[0016] 1-online particle size analyzer; 2-detection port; 3-drying tower; 4-air duct; 5-material collecting and filtering device; 6-atomizer; 501-cyclone separator; 502-bag dust collector; 503-water film dust collector; 504-washing adsorber. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1The embodiment of the utility model provides an automatic control device for the particle size of a spray drying product, comprising a drying tower 3, a material collection and filtering device 5, a detection port 2, and an online particle size analyzer 1. Among them:

[0019] An atomizer 6 is installed on the top of the drying tower 3 .

[0020] The material collecting and filtering device 5 is connected to the drying tower 3 through the air duct 4 .

[0021] The detection port 2 is installed on any one or more of the drying tower 3, the air duct 4 or the material receiving and filtering device 5, and the detection port 2 is equipped with a lens.

[0022] An online particle size analyzer 1 is installed outside the detection port 2. The online particle size analyzer 1 is connected to the atomizer 6. The online particle size analyzer 1 is used to scan and detect the particle size of the dry product particles.

[0023] As a preferred embodiment, the lens adopts a through-through changeable lens. The detection ports are through-through, and each detection port is equipped with a lens, and the lens is replaceable, and a flat lens or a concave or convex lens can be selected according to the working conditions.

[0024] Preferably, a timed self-cleaning system is provided inside the lens to remove attachments on the inner surface of the lens.

[0025] Preferably, the lens is made of high temperature resistant fiberglass with a temperature resistance of up to 500°C.

[0026] Brackets are fixed to the outsides of the two detection ports that are arranged opposite to each other. The transmitter and receiver of the online particle size analyzer 1 are respectively installed on the brackets. The transmitter and the receiver can be connected to the brackets by flanges, quick-release cards, threaded connections, etc., and the transmitter and the receiver are coaxially installed. The laser emitted by the transmitter passes through the lens and is received by the receiver.

[0027] As a preferred embodiment, it also includes a PLC controller, which is connected between the online particle size analyzer 1 and the atomizer 6. The online particle size analyzer 1 and the atomizer 6 are interlocked through the PLC controller. PLC controller (digital electronic device) generally refers to a programmable logic controller (programmable control device). A programmable logic controller is a digital operation electronic system designed specifically for use in an industrial environment. It uses a programmable memory to store instructions for performing logical operations, sequential control, timing, counting and arithmetic operations, and controls various types of mechanical equipment or production processes through digital or analog input and output. The particle size data of the dry product particles detected by the online particle size analyzer 1 can be transmitted to the PLC controller, and a program is built into the PLC controller. The PLC controller analyzes and issues instructions to the atomizer 6 to adjust the operating parameters of the atomizer 6, thereby changing the particle size of the product particles.

[0028] As a preferred embodiment, the material collection and filtering device 5 is composed of one or more of a cyclone separator 501, a bag dust collector 502, a water film dust collector 503, and a washing adsorber 504 connected in series. The material collection and filtering device 5 separates and collects the transported dry product particles, and can purify the tail gas. In this embodiment, the material collection and filtering device 5 includes a cyclone separator 501, a bag dust collector 502, a water film dust collector 503, and a washing adsorber 504, and they are connected in pairs, wherein the cyclone separator 501 is connected to the air duct 4, and the washing adsorber 504 exhausts the tail gas.

[0029] The online particle size analyzer 1 has a detection range of 0.1μm to 2500μm for the particle size of dry products, and a scanning cycle of 250 milliseconds and is adjustable. The online particle size analyzer 1 can detect thousands to millions of dry product particles per minute, and the detection data is generated instantly and sent to the PLC controller.

[0030] Specifically, the stock liquid is transported to the atomizer 6 and atomized into droplets by the atomizer 6, and dried into dry product particles with extremely low water content in the drying tower 3. The dry product particles dried in the drying tower 3 are transported to the material receiving and filtering device 5 through the air duct 4. During the transportation process, the laser emitted by the online particle size analyzer 1 passes through the lens to perform real-time scanning and detection of the dry product particles in the internal flow state. The detection data of the online particle size analyzer 1 is generated in real time and transmitted back to the PLC controller. After analysis by the PLC controller, the operating parameters of the atomizer 6 are adjusted to change the particle size of the product particles, realizing real-time monitoring of the particle size of the spray-dried product, and the operating parameters of the atomizer 6 can be adjusted autonomously according to the difference between the real-time data and the ideal value so that it gradually approaches the ideal value and finally stabilizes at the ideal value.

[0031] The utility model discloses an automatic control device for the particle size of a spray-dried product, which adds online particle size detection to the spray-drying system, takes the particle size distribution of the dried product as the core control process feedback variable, realizes continuous monitoring of the operation process and real-time data display, transmission and control, so that the product is closer to the target value, reduces product batch differences and defective products, reduces measurement errors and laboratory work intensity, and enables the spray dryer to be further optimized across stages.

[0032] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A spray drying product particle size automatic control device, characterized in that: include: Drying tower with atomizer installed on top; A material collecting and filtering device connected to the drying tower through an air duct; A detection port is installed on any one or more of the drying tower, the air duct or the material receiving and filtering device, and the detection port is equipped with a lens; An online particle size analyzer for scanning and detecting particles of the dry product is installed outside the detection port, and the online particle size analyzer is connected to the atomizer.

2. The automatic control device for the particle size of the spray-dried product according to claim 1, characterized in that: The lens is a cross-talk transformable lens.

3. The automatic control device for the particle size of the spray-dried product according to claim 1, characterized in that: It also includes a PLC controller, which is connected between the online particle size analyzer and the atomizer. The online particle size analyzer and the atomizer are program-linked through the PLC controller.

4. The automatic control device for the particle size of the spray-dried product according to claim 1, characterized in that: The material collecting and filtering device is composed of one or more of a cyclone separator, a bag dust collector, a water film dust collector, and a washing adsorber connected in series.

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