Device for detecting impurity content in water based on light transmittance

Abstract

The utility model discloses a device for detecting impurity content in water based on light transmittance. The device comprises a flow passage component, a shell shading component, a light transmission detection component and a control development board, two ends of the flow passage component are connected with an external fluid inlet and outlet; a square glass tube is arranged in the middle of the flow passage component for light transmission; the shell shading component is mounted outside the flow passage component and is used for isolating interference of external light on the light transmission detection component; the light transmission detection component is mounted between the shell shading component and the flow passage component, emits light to the flow passage component, and transmits the detected light transmittance to the control development board at the same time; the control development board receives and judges a light transmittance signal of the light transmission detection component and then transmits a control signal to an external PLC to control the electrically operated valve and the water pump. The impurity content in the high-temperature and high-corrosion medium is detected in a non-contact detection mode, and the device is low in production and operation cost, convenient to use and high in stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of steel industry wastewater treatment, and particularly relates to a device for detecting impurity content in water based on light transmittance. BACKGROUND

[0002] "Blast furnace slag flushing water" refers to the process of flushing the slag iron at the bottom of the blast furnace (furnace bottom) to remove the solid substances such as clogged iron slag, slag and ash slag, and to ensure the smooth operation of the blast furnace. This operation helps to maintain the normal operation of blast furnace smelting and ensures the continuity and efficiency of the steel production process.

[0003] As a low-temperature waste heat source, blast furnace slag flushing water has the characteristics of stable temperature and large flow. How to make the slag flushing water play the benefit of waste heat utilization has gradually become a research topic. In the ironmaking process, the new water consumed by slag flushing accounts for more than 50% of the total new water consumption. About 11.2 tons of new water are consumed for flushing 1 ton of water slag, and the circulating water consumption is about 10 tons. According to the steel production output of 500 million tons in China, and according to the calculation of 350 kg of slag per ton of iron, the new water consumption for slag flushing alone exceeds 150 million tons, accounting for 4% of the new water consumption of the steel industry. The physical heat of the blast furnace slag taken away by the slag flushing water accounts for about 8% of the ironmaking energy consumption, which is equivalent to about 21 kg of standard coal (calculated at 350 kg / ton of iron). The water temperature of the circulating water pool ranges from 60 to 85°C, which belongs to industrial low-temperature waste heat source. If it is not utilized, this part of energy will be wasted.

[0004] For the waste heat utilization of blast furnace slag flushing water, the main method is to directly utilize the sensible heat to provide winter heating. This utilization method is simple in technology and low in transformation cost, but the following problems exist:

[0005] The slag flushing water contains a large amount of impurities, which is easy to cause blockage after entering the pipe network, and the heating pipe network system is large, so the cleaning difficulty is very high.

[0006] In terms of the sensible heat utilization of slag flushing water, a plate heat exchanger with high heat exchange efficiency is usually used. In order to ensure the safe operation of the heat exchanger, a pre-filter is usually configured to prevent waste slag from entering the heat exchanger and affecting the heat exchange efficiency. However, the content of waste slag in the slag flushing water has great fluctuation, and in actual operation, there is a high instantaneous content of slag (20% mass ratio) in a short time, and the filter cannot remove the related waste slag in a short time, causing the filter to be blocked.

[0007] Therefore, it is urgent to design a device capable of monitoring high-temperature, high-corrosion-intensity water quality impurity content, and to link it with the heat exchanger control system to effectively protect the installation and operation of the heat exchanger and the filter. UTILITY MODEL CONTENTS

[0008] Therefore, the device for detecting impurity content in water based on light transmittance has the advantages that the non-contact detection mode is used to detect the impurity content in high-temperature and high-corrosive medium, the production and operation cost is low, the device is convenient to use and has high stability.

[0009] A device for detecting impurity content in water based on light transmittance, comprising a flow component, a shell light shielding component, a light transmission detection component and a control development board.

[0010] The flow component is used for connecting external fluid inlets and outlets, and a square glass tube is arranged in the middle of the flow component for light transmission.

[0011] The shell light shielding component is arranged outside the flow component.

[0012] The light transmission detection component is arranged between the shell light shielding component and the flow component, emits light to the flow component, and transmits the detected light transmittance to the control development board.

[0013] The control development board receives the light transmittance signal of the light transmission detection component, judges and transmits a control signal to an external PLC to control an electric valve and a water pump.

[0014] Further, the flow component comprises a square glass tube, a connecting steel pipe, a clamping piece and a sealing gasket; the connecting steel pipe is sealed and fixed at the front and rear ends of the square glass tube by the clamping piece and the sealing gasket, and the above components are connected to form an integral whole.

[0015] Further, the shell light shielding component comprises a shell, an upper cover, an upper light shielding plate and a lower light shielding plate; the shell and the upper cover are matched to completely enclose the flow component in a rectangular space formed thereby, the front end of the shell is provided with circular holes for the connecting steel pipe to pass through, and the upper light shielding plate and the lower light shielding plate are located directly above and below the square glass tube, respectively.

[0016] Further, the light transmission detection component comprises an LED light source, a photoresistor and a bracket; the LED light source and the photoresistor are fixed on the opposite left and right sides of the square glass tube by the bracket.

[0017] Further, the control development board realizes detection and control of different media by the program burned therein, such as detection time interval, signal transmission, real-time feedback and light transmittance of different flow media.

[0018] Advantages:

[0019] 1. The utility model discloses a square glass tube is arranged in the middle of the flow component, and the glass tube can not only transmit light, but also can ensure that the fluid in the component continuously flows to prevent impurities from affecting the accuracy of detection, and the light shielding part of the shell is installed outside the flow component to isolate external light from interfering with the light transmission detection part.

[0020] 2. The impurity content detection device of the utility model is composed of four modules of flow component, shell light shielding part, light transmission detection part and control development board, and the detection principle is simple, all kinds of modules are existing mature products, the structure is simple and convenient to maintain, and the operation is reliable.

[0021] 3. The impurity content detection device of the utility model can feed back data in the extremely short time when impurities change in water, effectively protect the safety of the heat exchange device, and improve the stability of the overall system. The device can also be applied to various sewage treatment processes, and collect sewage related data for big data analysis. DRAWINGS

[0022] Figure 1 It is the structure composition schematic diagram of the impurity content detection device of the utility model;

[0023] Figure 2 It is the three-dimensional view of the impurity content detection device of the utility model;

[0024] Figure 3 It is the flow component schematic diagram of the impurity content detection device of the utility model;

[0025] Figure 4 It is the shell light shielding part schematic diagram of the impurity content detection device of the utility model;

[0026] Figure 5 It is the light transmission detection part schematic diagram of the impurity content detection device of the utility model.

[0027] Among them, 1-flow component, 1-1-square glass tube, 1-2-connection steel pipe, 1-3-clamp, 1-4-sealing gasket, 2-shell light shielding part, 2-1-shell, 2-2-upper cover, 2-3-upper light shielding plate, 2-4-lower light shielding plate, 3-light transmission detection part, 3-1-LED light source, 3-2-photoresistor, 3-3-support I, 3-4-support II, 4-control development board. DETAILED DESCRIPTION

[0028] The utility model will be described in detail in combination with the drawings and examples.

[0029] As shown in the accompanying Figure 1 and 2As shown, the utility model provides a device based on light transmittance detects water impurity content, including overflow component 1, shell light shielding component 2, light transmission detection component 3 and control development board 4.

[0030] As shown in the accompanying drawings Figure 3 As shown, overflow component 1 includes square glass tube 1-1, connecting steel pipe 1-2, clamping piece 1-3 and gasket 1-4, square glass tube 1-1 is sealed and fixed connecting steel pipe 1-2 at the front and rear ends of square glass tube 1-1 by clamping piece 1-3 and gasket 1-4, the above-mentioned components form an integral whole after being connected, ensure that the fluid in the component continuously flows to prevent impurities from affecting the accuracy of detection, high temperature or high corrosive liquid flows in the overflow component 1. The overflow component 1 is made of small diameter pipe to reduce the influence of detection on system operation. The material used for the overflow component is purchased according to the market finished product.

[0031] As shown in the accompanying drawings Figure 4 As shown, shell light shielding component 2 includes shell 2-1, upper cover 2-2, upper light shielding plate 2-3 and lower light shielding plate 2-4;Shell 2-1 and upper cover 2-2 are matched to completely enclose overflow component 1 in the rectangular space formed by them, the front end of shell 2-1 has a circular hole for connecting steel pipe 1-2 to pass through;Upper light shielding plate 2-3 and lower light shielding plate 2-4 are located directly above and below square glass tube 1-1-1 respectively. Shell 2-1 and upper cover 2-2 are made of stainless steel material, which can be welded with 316L plate or cut with CNC to make customized products, upper light shielding plate 2-3 and lower light shielding plate 2-4 are made of rubber to ensure that they have certain elasticity and ensure the tightness of light shielding, the rubber can be high temperature resistant rubber to ensure the temperature resistance of the whole component.

[0032] As shown in the accompanying drawings Figure 5 As shown, light transmission detection component 3 includes LED light source 3-1, photoresistor 3-2, bracket I 3-3 and bracket II 3-4;LED light source 3-1 and photoresistor 3-2 are fixed on the left and right sides of square glass tube 1-1 respectively through bracket I 3-3 and bracket II 3-4. Among them, LED light source 3-1 adopts existing 3535 high-power LED lamp bead, photoresistor 3-2 adopts existing GL5516 type, bracket I 3-3 and bracket II 3-4 can be made of related leftover materials.

[0033] The control development board 4 realizes the detection and control of different media through the program burned in it, such as detection time interval, signal transmission, real-time feedback and different overflow medium light transmittance. Control development board 4 can adopt existing Arduino development board, Raspberry Pi, STM32 development board, and control program adopts C language programming.

[0034] To sum up, the above is only the preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for detecting the content of impurities in water based on light transmission, characterized in that, It comprises overflow component, shell light shielding component, light transmission detection component and control development board. Two ends of the overflow component are used to connect external fluid inlet and outlet, and a square glass tube is arranged in the middle of the overflow component for light transmission. The shell light shielding component is installed outside the overflow component. The light transmission detection component is installed between the shell light shielding component and the overflow component, which emits light to the overflow component and transmits the detected light transmission rate to the control development board. The control development board receives the light transmission rate signal from the light transmission detection component, judges and transmits control signal to external PLC to control electric valve and water pump.

2. The device for detecting the content of impurities in water based on light transmittance according to claim 1, characterized in that, The overflow component comprises square glass tube, connecting steel pipe, clamping piece and sealing gasket.

3. The device for detecting the content of impurities in water based on light transmittance according to claim 2, characterized in that, The connecting steel pipe is sealed and fixed at the front and rear ends of the square glass tube by the clamping piece and the sealing gasket, and the above components are connected to form an integral whole.

4. The device for detecting the content of impurities in water based on light transmittance according to claim 1, characterized in that, The shell light shielding component comprises shell, upper cover, upper light shielding plate and lower light shielding plate.

5. The device for detecting the content of impurities in water based on light transmittance according to claim 3 or 4, characterized in that, The overflow component is completely enclosed in the rectangular space formed by the shell and the upper cover, and the front end of the shell has circular holes for the connecting steel pipe to pass through. The upper light shielding plate and the lower light shielding plate are located directly above and below the square glass tube, respectively. The light transmission detection component comprises LED light source, photoresistor and bracket. The LED light source and the photoresistor are fixed on the opposite left and right sides of the square glass tube by the bracket. The control development board realizes detection and control of different media through its burned program in terms of detection time interval, signal transmission, real-time feedback and light transmission rate of different overflow media.

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