A safety monitoring system for iron phosphate production

Abstract

The present invention relates to the field of new energy technology, and more specifically to a safety monitoring system for ferric phosphate production. The system utilizes the ability of carbon dioxide and oxygen gas components to be selectively absorbed by appropriate reagents, allowing for sequential absorption. A combustion method is used to obtain data on the volume change of the gas before and after combustion, thereby calculating the volume concentration of the combustible gas. This system can accurately obtain the concentration of the combustible gas, and employs a closed catalytic combustion method to avoid the risk of explosion from leaked combustible gas in the environment.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a safety monitoring system for iron phosphate production. Background Art

[0002] The main equipment for preparing ferric phosphate using the sulfuric acid method is a gasification kiln and a bubbling boiling reduction furnace, with combustible gases being the focus of monitoring. A Chinese invention patent (patent number CN201110218247.7, entitled "Combustible Gas Sampling Device and Method for Determining Combustible Gas Air Content") discloses a combustible gas sampling device and method for determining combustible gas air content. The device features a sampling tube with a handle, a stainless steel tube with an inner diameter of 150 mm and a length of 450 mm, one end closed and the other open. Hold the handle of the above-mentioned combustible gas sampling device with one hand, and aim the open end of the sampling cylinder at the sampling tube on the on-site combustible gas pipeline. After the combustible gas completely fills the sampling cylinder, hold the sampling cylinder with the other hand and move it away from the sampling tube on the combustible gas pipeline. Quickly seal the opening of the sampling cylinder with your palm. Another person holds the ignition device and approaches the opening of the sampling cylinder. The person holding the sampling cylinder immediately releases his right hand that is blocking the sampling cylinder, so that the ignition device can ignite the combustible gas in the sampling cylinder. If an explosion sound is heard, it means that the air content in the combustible gas pipeline has reached or exceeded the dangerous value, and the pipeline cannot deliver gas.

[0003] The sampling tube in the existing technology cannot obtain the accurate concentration of combustible gas, and it is very dangerous to use open flame to ignite it. If the combustible gas leaked in the environment has reached the explosion limit, even a spark can easily cause serious consequences of an explosion. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a safety monitoring system for ferric phosphate production, which is characterized by comprising a gas generating furnace combustible gas monitoring system and a bubbling boiling reduction furnace safety production monitoring system. The working principle of the gas generating furnace combustible gas monitoring system is as follows: the carbon dioxide and oxygen gas components can be selectively absorbed by appropriate reagents and absorbed sequentially, and the volume concentration of the combustible gas is calculated by using the combustion method to obtain the gas volume change data before and after combustion; the gas generating furnace combustible gas monitoring system comprises an injection burner, a gas absorption bottle, and an injection buffer; the injection burner comprises an injection cylinder, a push rod, a catalyst, and an injection barrel; the gas absorption bottles are, in order, a carbon dioxide gas absorption bottle and an oxygen gas absorption bottle; the structure of the gas absorption bottle is designed with an intake pipe, an absorption bottle body, a return liquid pipe, and an exhaust pipe; bubbles are generated after the gas enters the absorption bottle body from the intake pipe, and the formed gas-liquid mixture collides and separates with the wall of the return liquid pipe; the gas is discharged from the exhaust pipe, and the liquid returns to the absorption bottle body through the return liquid pipe; a 33% mass fraction potassium hydroxide aqueous solution is injected into the carbon dioxide gas absorption bottle, and a sodium dithionite alkaline solution is injected into the oxygen gas absorption bottle; the injection buffer comprises a gas cylinder, a piston rod , buffer cylinder; before working, the injection buffer should completely extract the air from the two gas absorption bottles in series, and no liquid column and bubbles should be observed in the connecting pipe between the gas absorption bottle and the injection buffer, the vacuum degree should be -800Pa, and the pipeline should be sealed intact; during working, the push rod absorbs a fixed volume of on-site gas under the drive of the injection cylinder, and then the push rod discharges all the sampling gas in the injection cylinder. The sampling gas enters the injection buffer after absorbing carbon dioxide through potassium hydroxide aqueous solution and oxygen through sodium dithionite alkaline solution. The buffer cylinder moves to inject the sampling gas into the injection burner through the piston rod. A fixed volume of pure oxygen is injected into the injection burner. The catalyst is composed of spirally wound platinum wire and graphite filler. The catalyst is installed on the inner wall of the injection cylinder. The platinum wire is energized and heated to 800°C to burn the sampled gas. The sampled gas is cooled to room temperature through the water-cooling jacket of the injection cylinder and then injected into the carbon dioxide gas absorption bottle to absorb carbon dioxide. The gas in the carbon dioxide gas absorption bottle is extracted by the injection buffer to a vacuum degree of -800Pa, and the gas line to the carbon dioxide gas absorption bottle is cut off. After the buffer cylinder slowly returns to the sampling pressure state of the injection burner, the measured volume is calculated to be the volume concentration of the combustible gas.

[0005] Working principle of safety production monitoring of bubbling boiling reduction furnace: Due to the limited high temperature and pressure resistance of the dynamic seals at both ends of the gas generating furnace, the gas outlet pressure is limited to 800-1000Pa. The stacking height of iron ore powder in the bubbling boiling reduction furnace is designed to be 30-50cm above the gas distributor. The resistance pressure drop caused by the excessive stacking height causes the gas distributor to be blocked. Then the dynamic seals at both ends of the gas generating furnace will cause gas leakage and explosion hazard. The stacking height of iron ore powder can be measured by displacement method. The safety production monitoring system of bubbling boiling reduction furnace includes worm reducer, balance chain plate, distribution slurry plate, chain, measuring slurry plate, and the balance chain plate is equipped with a worm reducer at both ends. There is a sprocket, and the chain is engaged with the sprocket and suspended at both ends of the balancing chain plate. The distribution slurry plate and the measuring slurry plate are suspended at both ends of the chain in turn. The structure of the distribution slurry plate and the measuring slurry plate is two superimposed strip plates, one long and one short. The counterweight of the short strip plate is used to adjust the position of the center of gravity of the structure. The distribution slurry plate and the measuring slurry plate are in an inclined hanging state. The worm reducer drives the balancing chain plate to drive the distribution slurry plate and the measuring slurry plate to rotate. The iron ore powder falls from the feed hopper and is evenly distributed by the distribution slurry plate. If the height of the accumulated iron ore powder layer exceeds the design height, the inclination angle of the measuring slurry plate will be destroyed, and the chain of the balancing chain plate will be displaced. The electrical signal of the displacement feedback controls the feeding speed of the iron ore powder.

[0006] Compared with the prior art, the present invention has at least the following advantages: carbon dioxide and oxygen gas components can be selectively absorbed by appropriate reagents and absorbed sequentially, a combustion method is used to obtain gas volume change data before and after combustion to calculate the volume concentration of the combustible gas, and an accurate concentration of the combustible gas can be obtained, and a closed catalytic combustion method is used to avoid the risk of explosion of combustible gas leaking in the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the main view I structure of a safety monitoring system for iron phosphate production according to the present invention.

[0008] Figure 2 This is a schematic diagram of the structure of sample A of a safety monitoring system for iron phosphate production of the present invention.

[0009] Figure 3 This is a schematic diagram of the B-sample structure of a safety monitoring system for iron phosphate production of the present invention.

[0010] Figure 4 This is a schematic diagram of the main view II structure of a safety monitoring system for iron phosphate production according to the present invention.

[0011] Figure 5 This is a schematic diagram of the C-sample structure of a safety monitoring system for iron phosphate production according to the present invention.

[0012] Ⅰ-Injection burner Ⅱ-Gas absorption bottle Ⅲ-Injection buffer

[0013] IV - Gas generating kiln V - Bubbling boiling reduction furnace

[0014] 1-Injection cylinder 2-Push rod 3-Catalyst 4-Injection barrel 5-Intake pipe

[0015] 6-Absorption bottle 7-Liquid return pipe 8-Exhaust pipe 9-Air cylinder 10-Piston rod

[0016] 11-Buffer cylinder 12-Distributor assembly 13-Gas distributor 14-Worm reducer

[0017] 15-Balance chain plate 16-Distribution slurry plate 17-Chain 18-Measurement slurry plate

[0018] 19-Carbon dioxide gas absorption bottle 20-Oxygen gas absorption bottle. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5As shown, a safety monitoring system for iron phosphate production is characterized by: including a gas generating furnace combustible gas monitoring system and a bubbling boiling reduction furnace safety production monitoring system. The working principle of the gas generating furnace combustible gas monitoring is: carbon dioxide and oxygen gas components can be selectively absorbed by appropriate reagents and absorbed in sequence, and the combustion method is used to obtain the gas volume change data before and after combustion to calculate the volume concentration of the combustible gas; the gas generating furnace combustible gas monitoring system includes an injection burner I, a gas absorption bottle II, and an injection buffer III; the injection burner I includes an injection cylinder 1, a push rod 2, a catalyst 3, an injection barrel 4, and a gas The absorption bottles are, in order, a carbon dioxide gas absorption bottle 19 and an oxygen gas absorption bottle 20. The structure of the gas absorption bottles is designed to include an intake pipe 5, an absorption bottle body 8, a return liquid pipe 7, and an exhaust pipe 6. After the gas enters the absorption bottle body 8 from the intake pipe 5, bubbles are generated. The formed gas-liquid mixture collides and separates with the wall of the return liquid pipe 7. The gas is discharged from the exhaust pipe 6, and the liquid returns to the absorption bottle body 8 through the return liquid pipe 7. A 33% mass fraction potassium hydroxide aqueous solution is injected into the carbon dioxide gas absorption bottle 19, and a sodium dithionite alkaline solution is injected into the oxygen gas absorption bottle 20. The injection buffer III includes a gas cylinder 9, a piston rod 10, and a buffer cylinder 11. Before working, the injection buffer III should completely extract the air from the two gas absorption bottles II in series. No liquid column and bubbles should be observed in the connecting pipe between the gas absorption bottle II and the injection buffer III. The vacuum degree should be -800Pa, and the pipeline should be sealed intact. During working, the push rod 2 absorbs a fixed volume of on-site gas under the drive of the injection cylinder 1, and then the push rod 2 discharges all the sampling gas in the injection cylinder 4. The sampling gas enters the injection buffer III after absorbing carbon dioxide through the potassium hydroxide aqueous solution and oxygen through the sodium dithionite alkaline solution. The buffer cylinder 11 moves to inject the sampling gas into the injection burner I through the piston rod 10, and injects the sample gas into the injection burner I. Burner I injects a fixed volume of pure oxygen. The catalyst 3 is composed of spirally wound platinum wire and graphite filler. The catalyst is installed on the inner wall of the injection cylinder 4. The platinum wire is energized and heated to 800°C to burn the sampled gas. After cooling to room temperature through the water-cooling jacket of the injection cylinder 4, it is injected into the carbon dioxide gas absorption bottle 19 to absorb carbon dioxide. The gas in the carbon dioxide gas absorption bottle 19 is extracted by the injection buffer III to a vacuum degree of -800Pa, and the gas line with the carbon dioxide gas absorption bottle 19 is cut off. After the buffer cylinder 11 slowly returns to the sampling pressure state of the injection burner I, the measured volume is calculated to be the volume concentration of the combustible gas.

[0021] Working principle of safety production monitoring of bubbling boiling reduction furnace: Due to the limited high temperature and pressure resistance of the dynamic seals at both ends of the gas generating furnace IV, the gas outlet pressure is limited to 800-1000Pa. The stacking height of iron ore powder in the bubbling boiling reduction furnace V is designed to be 30-50cm above the gas distributor 13. The resistance pressure drop caused by the excessive stacking height causes the gas distributor 13 to be blocked. Then the dynamic seals at both ends of the gas generating furnace IV will cause gas leakage and explosion hazard. The stacking height of iron ore powder can be measured by displacement method. The safety production monitoring system of bubbling boiling reduction furnace includes worm reducer 14, balance chain plate 15, distribution slurry plate 16, chain 17, and measuring slurry plate 18. Sprockets are designed at both ends of the balance chain plate 15. Chain 1 7 is engaged with the sprocket and suspended at both ends of the balancing chain plate 15, and the two ends of the chain 17 are suspended in sequence. The distribution slurry plate 16 and the measuring slurry plate 18 are structured as two superimposed strip plates, one long and one short. The counterweight of the short strip plate is used to adjust the position of the center of gravity of the structure. The distribution slurry plate 16 and the measuring slurry plate 18 are in an inclined hanging state. The worm reducer 14 drives the balancing chain plate 15 to drive the distribution slurry plate 16 and the measuring slurry plate 18 to rotate. The iron ore powder falls from the feed hopper and is evenly distributed by the distribution slurry plate 16. If the height of the accumulated iron ore powder layer exceeds the design height, the inclination angle of the measuring slurry plate 18 will be destroyed, and the chain 17 of the balancing chain plate 15 will be displaced. The electrical signal fed back by the displacement controls the feeding speed of the iron ore powder.

Claims

1. A safety monitoring method for ferric phosphate production, characterized by: It includes the combustible gas monitoring system for gas generator furnaces and the bubbling boiling reduction furnace safety production monitoring system. The working principle of the combustible gas monitoring system for gas generator furnaces is: the carbon dioxide and oxygen gas components can be selectively absorbed by appropriate reagents and absorbed in sequence, and the combustion method is used to obtain the gas volume change data before and after combustion to calculate the volume concentration of the combustible gas; the combustible gas monitoring system for gas generator furnaces includes an injection burner, a gas absorption bottle, and an injection buffer; the injection burner includes an injection cylinder, a push rod, a catalyst, and an injection barrel. The gas absorption bottles are carbon dioxide gas absorption bottles and oxygen gas absorption bottles in sequence. The structural design of the gas absorption bottle includes an intake pipe, an absorption bottle body, a return liquid pipe, and an exhaust pipe. The carbon dioxide gas absorption bottle is injected with mass The fraction is 33% potassium hydroxide aqueous solution, and the oxygen gas absorption bottle is injected into the sodium dithionite alkaline solution. The injection buffer includes a gas cylinder, a piston rod, and a buffer cylinder. Before work, the injection buffer will extract all the air from the two gas absorption bottles in series. No liquid column and bubbles can be observed in the connecting pipe between the gas absorption bottle and the injection buffer. The vacuum degree is -800Pa, and the pipeline is sealed intact. During work, the push rod absorbs a fixed volume of on-site gas under the drive of the injection cylinder, and then the push rod discharges all the sampling gas in the injection cylinder. The sampling gas absorbs carbon dioxide through the potassium hydroxide aqueous solution and oxygen through the sodium dithionite alkaline solution and then enters the injection buffer. The buffer cylinder moves to inject the sampling gas into the injection burner through the piston rod, and injects the injection burner into the injection burner. A fixed volume of pure oxygen is injected. The catalyst is composed of spirally wound platinum wire and graphite filler. The catalyst is installed on the inner wall of the injection cylinder. The platinum wire is energized and heated to 800℃ to burn the sampled gas. After cooling to room temperature through the water-cooling jacket of the injection cylinder, it is injected into the carbon dioxide gas absorption bottle to absorb carbon dioxide. The gas in the carbon dioxide gas absorption bottle is extracted by the injection buffer to a vacuum degree of -800Pa. The gas line to the carbon dioxide gas absorption bottle is cut off. After the buffer cylinder slowly returns to the sampling pressure state of the injection burner, the measured volume is calculated to be the volume concentration of the combustible gas; The working principle of the safety production monitoring of the bubbling boiling reduction furnace: Due to the limited high temperature and pressure resistance of the dynamic seals at both ends of the gas generation kiln, the gas outlet pressure is limited to 800~100 0Pa, the stacking height of iron ore powder in the bubbling boiling reduction furnace is designed to be 30 to 50 cm above the gas distributor. The resistance pressure drop caused by the excessive stacking height causes the gas distributor to be blocked, and the dynamic seals at both ends of the gas generating kiln will cause gas leakage and explosion hazard. The stacking height of the iron ore powder is measured by the displacement method; the bubbling boiling reduction furnace safety production monitoring system includes a worm reducer, a balancing chain plate, a distribution slurry plate, a chain, and a measuring slurry plate. Sprockets are designed at both ends of the balancing chain plate. The chain is engaged with the sprocket and hung at both ends of the balancing chain plate. The distribution slurry plate and the measuring slurry plate are hung at both ends of the chain in turn. The worm reducer drives the balancing chain plate to drive the distribution slurry plate and the measuring slurry plate to rotate, and the iron ore powder falls from the feed hopper and is evenly distributed by the distribution slurry plate.

2. The safety monitoring method for ferric phosphate production according to claim 1, wherein: When the gas enters the absorption bottle from the suction pipe, bubbles are generated. The formed gas-liquid mixture collides and separates with the wall of the return liquid pipe. The gas is discharged from the exhaust pipe and the liquid returns to the absorption bottle through the return liquid pipe.

3. The safety monitoring method for ferric phosphate production according to claim 1, wherein: The structure of the distribution slurry board and the measuring slurry board is two superimposed strip plates, one long and one short. The counterweight of the short strip plate is used to adjust the center of gravity of the structure. The distribution slurry board and the measuring slurry board are in an inclined hanging state.

4. The safety monitoring method for ferric phosphate production according to claim 1, wherein: If the height of the accumulated iron ore powder layer exceeds the designed height, the inclination angle of the slurry measuring plate will be destroyed, and the chain of the balancing chain plate will be displaced. The electrical signal of the displacement feedback controls the feeding speed of the iron ore powder.

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