High-temperature spark detection device installed at the top of a spray drying tower and its usage method

Abstract

High-temperature spark detection device installed at the top of a spray drying tower and its usage method, including a fixed mounting plate, stainless steel pipe I, and stainless steel pipe II; a pair of handgrips and a protective cover are provided on the fixed mounting plate, and the detector body of a high-temperature spark detector located within the protective cover is installed on the upper surface of the fixed mounting plate. One end of stainless steel pipe I is connected to one end of pipe joint I, and the other end of pipe joint I penetrates through the fixed mounting plate and is connected to an air storage tank through a hose. The top end of stainless steel pipe II is connected to the fixed mounting plate, and the bottom end is connected to a probe mounting seat through an elbow, and the bottom ends of stainless steel pipe I and stainless steel pipe II are fixed by a nozzle fixing ring. The other end of stainless steel pipe I is connected to a universal duckbill nozzle through pipe joint II. The device of the present invention can monitor the spark particles appearing at the top inside the spray drying tower in real time, transmit them to the detector body and the single-chip microcomputer to generate an alarm, reduce the possibility of explosion inside the drying tower, and reduce the economic losses to the enterprise and its personnel.

Description

Technical Field

[0001] The present invention belongs to the technical field of fire and explosion prevention of spray drying towers, and particularly relates to a high-temperature spark detection device installed on the top of a spray drying tower and its usage method. Background Art

[0002] Spray drying technology has been widely used in the production processes of dairy products, dehydrated foods, dyes, etc. Common products such as milk powder, instant coffee, instant food soup, and medicines are the products generated during the spray drying process. Due to the fact that spray drying technology greatly simplifies the process of related granule production, shortens the processing time, and improves the production efficiency and quality, the application of spray drying technology is becoming more and more extensive.

[0003] Since the moisture content of the dust is relatively low, the particle size of the powder is relatively small, the inlet air temperature is relatively high, and the continuous production time is too long during the spray drying production process; the powder may generate sparks when encountering static electricity or friction, leading to combustion or even explosion. Therefore, strengthening the real-time monitoring of the spray drying process parameters, tracking and recording the production parameters in real time, and making timely adjustments are important ways to avoid combustion and explosion inside the spray drying tower; and the top end inside the spray drying tower is a part where sparks are most likely to be generated. Therefore, the present invention provides a high-temperature spark detection device installed on the top of the spray drying tower. Through its special structure and installation method, it can detect the sparks generated at the top inside the spray drying tower without dead angles, and reduce the possibility of causing combustion and explosion from the perspective of preventing ignition sources. Summary of the Invention

[0004] To solve the problems existing in the above-mentioned spray drying technology, the present invention provides a high-temperature spark detection device installed on the top of a spray drying tower, which includes a fixed mounting plate with double handgrips, a protective cover installed on the fixed mounting plate, stainless steel pipe Ⅰ, stainless steel pipe Ⅱ, a high-temperature spark detector, a probe mounting seat, a nozzle fixing ring, and a pipe joint; the double handgrips are welded to the fixed mounting plate, a protective cover is arranged between the double handgrips, the protective cover is connected to the fixed mounting plate by bolts, the detector body of the high-temperature spark detector is installed on the upper surface of the fixed mounting plate and is located inside the protective cover, one end of stainless steel pipe Ⅰ is connected to one end of pipe joint Ⅰ, the other end of pipe joint Ⅰ passes through the fixed mounting plate and is connected to a gas storage tank through a hose, and a solenoid valve is arranged at the air outlet of the gas storage tank, the top end of stainless steel pipe Ⅱ is connected to the fixed mounting plate, the bottom end is a 180° elbow, a probe mounting seat is arranged at the end of the elbow, and the bottom ends of stainless steel pipe Ⅰ and stainless steel pipe Ⅱ are fixed by a nozzle fixing ring. A plurality of setscrew holes are formed circumferentially along the probe mounting seat, and the other end of stainless steel pipe Ⅰ is connected to a universal duckbill nozzle through pipe joint Ⅱ; the high-temperature spark detection device extends into the drying tower through the opening at the top end of the drying tower and is fixed on the top of the drying tower.

[0005] The high-temperature spark detector includes a high-temperature probe, an optical fiber cable, and a detector main body; the detector main body is fixed inside the protective cover. One end of the detector main body is connected to the high-temperature probe through the optical fiber cable, and the other end is connected to the single-chip microcomputer through a probe wire; the optical fiber cable connecting the detector main body and the high-temperature probe passes through and is fixed inside the stainless steel pipe II. The high-temperature probe is installed on the probe mounting seat through a setscrew, and the detection surface of the high-temperature probe is located on the upper end surface of the probe mounting seat, so that its detection angle of view is from the top of the drying tower to one side of the probe detection surface; the high-pressure purge gas is sprayed onto the end face of the high-temperature probe through the spray orifice of the universal duckbill nozzle to achieve the effect of regularly cleaning the dust on its end face.

[0006] The high-temperature spark detection devices are evenly distributed inside the spray drying tower. The number of high-temperature spark detection devices can be arranged according to the size of the specific spray drying tower to be protected, so that the entire cross-section of the drying tower is within the detection range of the detection devices; the entire cross-section of the spray drying tower is within the detection angle of view of the high-temperature spark detection devices, realizing dead-angle-free detection.

[0007] The lengths of the stainless steel pipe I and the stainless steel pipe II are in a positive correlation, and the height of the spray drying tower is proportional to the lengths of the stainless steel pipe I and the stainless steel pipe II.

[0008] The detection angle of view of the high-temperature probe is 120 - 150°.

[0009] The usage method of the high-temperature spark detection device installed on the top of the spray drying tower includes the following steps:

[0010] Step 1, adjust the probe angle by adjusting the probe mounting seat, align the universal duckbill nozzle with the surface of the high-temperature probe of the high-temperature spark detector, tighten the pipe joint bolts, vertically install the high-temperature spark detection device into the installation hole on the top of the spray drying tower, so that the high-temperature probe is aligned with the lower edge material outlet area of the hot air distributor along the circumference, adjust the fixed mounting plate so that the detection area of the high-temperature probe can cover all powder caking areas, and fix the high-temperature spark detection device; dock the stainless steel pipe I with the pipe joint I, open the solenoid valve, introduce a dry and clean pressure air source, and at the same time connect the signal control line of the high-temperature probe to the protective cover.

[0011] Step 2, when the high-temperature probe detects a spark in the detection area, the spark signal is conducted and amplified through the optical fiber cable inside the stainless steel pipe II to the probe main body, and then the signal is transmitted to the single-chip microcomputer through the detector main body to realize the detection alarm linkage function.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. By setting the universal duckbill nozzle to spray the high-pressure purge gas onto the end face of the high-temperature probe, the effect of regularly cleaning the dust on its end face is achieved, ensuring that the entire system is in a normal working state.

[0014] 2. In addition to the obvious advantage of realizing self-cleaning and ensuring its normal working state when the device of the present invention is installed in a spray drying tower in a high-temperature environment, it can also monitor the spark particles appearing at the top inside the spray drying tower in real time, give an alarm in time, stop supplying hot air to the spray drying tower, and at the same time start the water spray device installed on the side wall near the top of the drying tower in interlock to extinguish the spark particles in the drying tower as soon as possible, reduce the possibility of explosion in the drying tower, and reduce the economic losses of the enterprise and its personnel caused thereby.

[0015] 3. The overall device of the present invention is in the shape of a traditional umbrella handle. The detector main body is installed in the protective shell on the fixed mounting plate, and the optical fiber cable is arranged in the stainless steel pipe I. Due to the flexibility of the optical fiber, the detection surface of the high-temperature probe can be installed in any required direction according to needs; at the same time, for spray drying towers with different shapes and sizes, the length of the high-temperature spark detector extending into the tower can be customized according to the actual situation, and can be realized by adjusting the length of the optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Elevation view of the high-temperature spark detection device of the present invention installed on the top of the spray drying tower;

[0017] Figure 2 Front view of the high-temperature spark detection device of the present invention installed on the top of the spray drying tower;

[0018] Figure 3 The present invention is Figure 2 Partial view at A of;

[0019] Figure 4 Side view of the high-temperature spark detection device of the present invention installed on the top of the spray drying tower;

[0020] 1 - Fixed mounting plate; 2 - Protective cover; 3 - Double-handed grip; 4 - Stainless steel pipe I, 5 - Stainless steel pipe II, 6 - Probe mounting seat; 7 - Nozzle fixing ring; 8 - Elbow; 9 - Universal duckbill nozzle; 10 - Pipe joint I, 11 - Pipe joint II. DETAILED DESCRIPTION OF THE INVENTION

[0021] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0022] As Figures 1 to 4As shown in the figure, the high-temperature spark detection device installed on the top of the spray drying tower includes a fixed mounting plate 1 with a two-handed grip 3, a protective cover 2 mounted on the fixed mounting plate 1, a stainless steel pipe I 4, a stainless steel pipe II 5, a high-temperature spark detector, a probe mounting seat 6, a nozzle fixing ring 7, and a pipe joint; the two-handed grip 3 is welded to the fixed mounting plate 1, a protective cover 2 is arranged between the two-handed grips 3, the protective cover 2 is connected to the fixed mounting plate 1 by bolts, the detector body of the high-temperature spark detector located inside the protective cover 2 is mounted on the upper surface of the fixed mounting plate 1, one end of the stainless steel pipe I 4 is connected to one end of the pipe joint I 10, the other end of the pipe joint I 10 penetrates through the fixed mounting plate 1 and is connected to the gas storage tank through a hose, and a solenoid valve is arranged at the air outlet of the gas storage tank, the top end of the stainless steel pipe II 5 is connected to the fixed mounting plate 1, the bottom end is a 180° elbow 8, a probe mounting seat 6 is arranged at the end of the elbow 8, and the bottom ends of the stainless steel pipe I 4 and the stainless steel pipe II 5 are fixed by a nozzle fixing ring 7, a plurality of setscrew holes are formed along the circumference of the probe mounting seat 6, the other end of the stainless steel pipe I 4 is connected to a universal duckbill nozzle 9 through a pipe joint II 11, and the universal duckbill nozzle 9 must ensure that the jet airflow can reach the surface of the high-temperature probe to clean the dry powder accumulated on the surface of the high-temperature probe in time, so as to ensure that the whole system is in a normal working state; the high-temperature spark detection device extends into the drying tower through the opening at the top end of the drying tower and is fixed on the top of the drying tower. When the high-temperature spark detection device is applied to the food industry, its stainless steel pipe I 4, stainless steel pipe II 5, probe mounting seat 6, nozzle fixing ring 7, elbow 8, universal duckbill nozzle 9, pipe joint I 10 and pipe joint II 11 are made of 316 stainless steel material.

[0023] The high-temperature spark detector includes a high-temperature probe, an optical fiber cable and a detector body; the detector body is fixed inside the protective cover 2, one end of the detector body is connected to the high-temperature probe through an optical fiber cable, and the other end is connected to a single-chip microcomputer through a probe wire; the optical fiber cable connecting the detector body and the high-temperature probe passes through the inside of the stainless steel pipe II 5 and is fixed. Due to the flexibility of the optical fiber cable, the detection surface of the high-temperature probe can be installed in any required direction according to needs; at the same time, for spray drying towers of different shapes and sizes, the length of the high-temperature spark detector extending into the tower can be customized according to the actual situation, and it can be achieved by adjusting the length of the optical fiber; the high-temperature probe is installed on the probe mounting seat 6 through a setscrew, and the detection surface of the high-temperature probe is located on the upper end surface of the probe mounting seat 6, so that its detection angle of view is from the top of the drying tower to one side of the probe detection surface; the high-pressure purge gas is sprayed onto the end face of the high-temperature probe through the blowing port of the universal duckbill nozzle 9 to achieve the effect of regularly cleaning the dust on its end face.

[0024] The high-temperature spark detection devices are evenly distributed inside the spray drying tower. The number of high-temperature spark detection devices can be arranged according to the size of the spray drying tower to be protected specifically, so that the entire cross-section of the drying tower is within the detection range of the detection devices; thus, the entire cross-section of the spray drying tower is within the detection view angle of the high-temperature spark detection devices, achieving dead-angle-free detection.

[0025] The lengths of the stainless steel pipe Ⅰ4 and the stainless steel pipe Ⅱ5 are in a positive correlation, and the height of the spray drying tower is proportional to the lengths of the stainless steel pipe Ⅰ4 and the stainless steel pipe Ⅱ5.

[0026] The detection view angle of the high-temperature probe is 120 - 150°. The number of high-temperature spark detection devices can be arranged according to the size of the specific spray drying tower, so that the entire cross-section of the drying tower is within the detection range of the detection devices.

[0027] The usage method of the high-temperature spark detection device installed on the top of the spray drying tower includes the following steps:

[0028] Step 1: Arrange the high-temperature spark detection device on the installation holes on the top platform of the spray drying tower, and distribute it equidistantly along the circumference of the hot air distributor on the spray drying tower. According to the circumferential size of the hot air distributor, the detection angle and detection distance of the high-temperature spark detection device, determine the distance and distribution quantity between the installation holes on the spray drying tower and the hot air distributor; adjust the probe angle by adjusting the probe mounting base 6, adjust the universal duckbill nozzle 9 to align with the surface of the high-temperature probe of the high-temperature spark detector, and tighten the bolts of the pipe joint 11. Vertically install the high-temperature spark detection device into the installation holes on the top of the spray drying tower, so that the high-temperature probe aligns with the lower edge material outlet area of the hot air distributor along the circumference, and adjust the fixed mounting plate 1 so that the detection area of the high-temperature probe can cover all powder caking areas, and fix the high-temperature spark detection device; dock the stainless steel pipe Ⅰ4 with the pipe joint Ⅰ10, open the solenoid valve, introduce dry and clean pressurized air source, and at the same time connect the signal control wire of the high-temperature probe to the protection cover 2.

[0029] Step 2: The high-temperature probe of the high-temperature spark detection device detects the sparks that may occur in the material outlet area at the lower edge of the hot air distributor of the spray drying tower. A very small part of the material is dried by hot air and adheres to the bottom of the hot air distributor in the form of powder. Under the high-temperature environment in the spray drying tower, the powder accumulates continuously and is prone to generating sparks. The high-temperature probe is connected by a high-temperature-resistant optical fiber and can work in the continuously high-temperature spray drying tower. The high-temperature spark detection device can achieve real-time detection of the sparks appearing in the detection area. During the operation of the high-temperature spark detection device, since the detection surface of the high-temperature probe faces upward, the dust accumulated on its surface can be blown by the high-pressure pulsed air flow ejected by the universal duckbill nozzle 9 to clean the surface of the high-temperature probe at high speed. When the high-temperature probe detects the appearance of sparks in the detection area, the spark signal is conducted and amplified through the optical fiber cable in the stainless steel pipe II to the probe body, and then the signal is transmitted to the single-chip microcomputer through the detector body to realize the detection and alarm linkage function. The high-temperature spark detection device can be quickly installed, cleaned, inspected and repaired. The newly added detection device has little impact on the structure of the spray drying tower body, does not contaminate the material, and has safe and reliable performance, being economical and affordable.

Claims

1. A high-temperature spark detection device installed at the top of a spray drying tower, characterized in that, It includes a fixed mounting plate with a two-handed grip, a protective buckle cover mounted on the fixed mounting plate, stainless steel pipe Ⅰ, stainless steel pipe Ⅱ, a high-temperature spark detector, a probe mounting seat, a nozzle fixing ring, and a pipe joint; The two-handed grip is welded to the fixed mounting plate. A protective buckle cover is arranged between the two-handed grips and is connected to the fixed mounting plate by bolts. The detector body of the high-temperature spark detector located inside the protective buckle cover is mounted on the upper surface of the fixed mounting plate. One end of stainless steel pipe Ⅰ is connected to one end of pipe joint Ⅰ, and the other end of pipe joint Ⅰ penetrates through the fixed mounting plate and is connected to a gas storage tank through a hose. An electromagnetic valve is arranged at the air outlet of the gas storage tank. The top end of stainless steel pipe Ⅱ is connected to the fixed mounting plate, and the bottom end is provided with an elbow. A probe mounting seat is arranged at the end of the elbow. The bottom ends of stainless steel pipe Ⅰ and stainless steel pipe Ⅱ are fixed by a nozzle fixing ring. A plurality of setscrew holes are formed circumferentially along the probe mounting seat. The other end of stainless steel pipe Ⅰ is connected to a universal duckbill nozzle through pipe joint Ⅱ; The high-temperature spark detection device extends into the spray drying tower through the top opening of the drying tower and is fixed at the top of the spray drying tower; The high-temperature spark detector includes a high-temperature probe, an optical fiber cable, and a detector body; The detector body is fixed inside the protective buckle cover. One end of the detector body is connected to the high-temperature probe through an optical fiber cable, and the other end is connected to a single-chip microcomputer through a probe wire; The optical fiber cable connecting the detector body and the high-temperature probe passes through the inside of stainless steel pipe Ⅱ and is fixed. The high-temperature probe is installed on the probe mounting seat by a setscrew. The detection surface of the high-temperature probe is located on the upper end surface of the probe mounting seat, so that its detection angle of view is from the top of the spray drying tower to one side of the probe detection surface; The lengths of stainless steel pipe Ⅰ and stainless steel pipe Ⅱ are in a positive correlation, and the height of the spray drying tower is proportional to the lengths of stainless steel pipe Ⅰ and stainless steel pipe Ⅱ.

2. The high-temperature spark detection device installed at the top of the spray drying tower according to claim 1, wherein: The detection angle of view of the high-temperature probe is 120~150°.

3. The high-temperature spark detection device installed at the top of the spray drying tower according to claim 1, characterized in that: The high-temperature spark detection devices are evenly distributed inside the spray drying tower.

4. The method of using the high-temperature spark detection device installed at the top of the spray drying tower according to claim 1, characterized in that It includes the following steps: Step 1: Adjust the probe angle by adjusting the probe mounting seat, adjust the universal duckbill nozzle to align with the surface of the high-temperature probe of the high-temperature spark detector, tighten the pipe joint bolts, vertically install the high-temperature spark detection device into the mounting hole at the top of the spray drying tower, so that the high-temperature probe is aligned with the lower edge material outlet area of the hot air distributor along the circumference, adjust the fixed mounting plate so that the detection area of the high-temperature probe can cover all powder caking areas, and fix the high-temperature spark detection device; Connect stainless steel pipe Ⅰ to pipe joint Ⅰ, open the electromagnetic valve, introduce a dry and clean pressurized air source, and at the same time connect the signal control line of the high-temperature probe to the protective buckle cover; Step 2: When the high-temperature probe detects a spark in the detection area, the spark signal is conducted and amplified through the optical fiber cable inside stainless steel pipe II to the probe body, and then the signal is transmitted to the single-chip microcomputer through the detector body to realize the detection alarm linkage function.

Images