32results about How to "Avoid flash explosion" patented technology

The invention provides a pipeline welding and plugging device, and relates to the technical field of pipeline welding. The pipeline welding and plugging device provided by the invention is used for plugging a pipeline when a preset flange and the pipeline are welded. The pipeline welding and plugging device comprises a pull rod, wherein an expansion head is connected to the first end of the pull rod, and an air guide hose is connected to the second end; and a screwing nut sleeves the second end of the pull rod, and the pull rod and the expansion head fixed to the pull rod axially move relativeto the pipeline by rotating the screwing nut so as to seal the pipeline. By using the pipeline welding and plugging device, the safety of welding operation is facilitated. Impurities such as high-temperature welding slags can be prevented from entering the to-be-connected pipeline, and the service life of the pipeline can be prolonged.

The invention relates to a flame monitoring technology optimization method for improving the safety of a combustion furnace, which mainly solves the problem that dangerous accidents cannot be effectively avoided in the prior art. The present invention comprises the following steps by adopting a kind of flame monitoring technology optimization method that improves combustion furnace safety: step one, setting flame monitoring equipment, main equipment comprises flame detector and industrial camera; Step 2, setting the alarm of flame detector ( sound and light alarm), and the linkage real-time monitoring (sound and light alarm) of the industrial camera and the flame detector, set the computer monitoring interface to prompt the emergency plan; step 3, set the automatic ignition program to stop using, set the forced purging process steps, wait for the whole The technical scheme of restarting the ignition program after all steps are completed solves the above problems well, and can be used in the safety control of GE coal-water slurry gasifier.

The invention provides an explosion-proof catalytic oxidation device, the explosion-proof catalytic oxidation device comprises an exhaust gas supply device for providing exhaust gas; an induced draftfan for guiding exhaust gas transportation; a catalytic oxidation device connected with an air supply port through a main pipe; a first oxygen content analyzer which is disposed between the exhaust gas supply device and the induced draft fan, and used for monitoring the oxygen content of the exhaust gas supplied by the exhaust gas supply device; and a gas intake valve which is disposed between thefirst oxygen content analyzer and the induced draft fan; a first branch pipe is also disposed between the first oxygen content analyzer and the gas intake valve, and an emergency vent valve is disposed on the first branch pipe; and a second branch pipe is further disposed between the gas intake valve and the induced draft fan, and is used for introducing air, and a second branch valve is arrangedon the second branch pipe. The explosion-proof catalytic oxidation device can effectively avoid the over-temperature operation of a catalytic oxidation unit, and can effectively prevent the flash explosion of a high hydrocarbon-containing gas.

The invention discloses a preparation method of small-granularity potassium-doped molybdenum alloy powder. The method comprises the following steps of: sieving potassium-doped molybdenum dioxide serving as a raw material; placing the sieved raw material into a reduction furnace in a single temperature region; performing reduction treatment for 3.5 to 5.5 hours under the conditions of hydrogen flow of 10 m<3>/h to 14 m<3>/h and constant temperature of between 940 and 970 DEG C; and cooling along with the furnace to obtain the potassium-doped molybdenum alloy powder with the average granularityof 1.5 to 3.5 mu m. The method is simple; the reduction temperature is low; the reduction time is short; the granularity of the reduced molybdenum alloy powder is controlled not to enlarge and the volatile loss of the potassium element is controlled; the wastage rate of the potassium element is not more than 25 percent; the advantages of high efficiency and energy conservation are achieved; and the prepared potassium-doped molybdenum alloy powder can be sintered by the conventional sintering process and the subsequent treatment process is simple.

The invention discloses a chlorosilane-containing silane tail gas treatment method, comprising the steps of (1) subjecting chlorosilane to primary condensation; (2) subjecting chlorosilane to secondary condensation; (3) performing separating to obtain chlorosilane; (4) stabilizing pressure with a gas pressure stabilizer tank; (5) combusting silane gas. The chlorosilane-containing silane tail gas treatment method has the advantages that chlorosilane in silane tail gas is recycled, the recycled chlorosilane is reusable for silane production systems, material loss is reduced, and production costis reduced; a combustion system herein has multiple combustion heads, the combustion system has positive pressure, the combustion heads are exposed in air, an anti-irradiation heat-insulating hood isarranged above, and air around a combustor is gathered around the combustor via the chimney effect; compared with traditional combustors, the combustion system allows silane tail gas and air to be mixed more sufficiently, so that combustion efficiency is significantly improved and silane tail gas treatment quantity is increased.

The invention discloses an explosion-proof rapid grinding production technology, which includes the production and processing of inflammable and explosive products such as sulfur powder. The beneficial effects of the present invention are: the import of raw materials adopts strong magnetism to remove iron to avoid spark explosion caused by the impact of the system after the iron enters; all the equipment in contact with the inflow of raw materials and the outflow of finished products are made of non-metallic materials or non-metallic linings, Avoid the explosion of friction sparks with metals; for the grinding process of raw materials, use non-metallic lining grinding equipment with a lower grinding speed and water cooling during the grinding process to avoid high-temperature explosions, and use the system to vacuumize and fill nitrogen for grinding Protection, and a pressure relief device is used to avoid operating accidents caused by excessive pressure. A dust recovery device is installed in the process device to ensure that the operating environment meets occupational hygiene requirements. In addition, the dust recovery device adopts negative pressure suction, and the conveying pipe adopts atomization humidification and water washing for dust removal to avoid dust explosion.

The invention discloses an active safety detection method for a dry cleaning machine. A dry cleaning solvent concentration detection sensor detects the concentration of steam in a drying circulating air duct or a washing drum and controls the opening and closing of a nitrogen supplementing device and/or an electronic safety valve through an electric signal; the nitrogen supplementing device and/or the electronic safety valve are/is mounted in the drying circulating air duct; moreover, in a drying procedure, the dry cleaning solvent concentration detection sensor detects the concentration value of dry cleaning solvent steam in the drying circulating air duct; and the nitrogen supplementing device is controlled to be started and stopped according to comparison between the steam concentration with a first threshold value A and a second threshold value B. The nitrogen supplementing device and the dry cleaning solvent concentration detection sensor are arranged in the drying circulating air duct, so that the functions of automatic concentration detection and automatic nitrogen supplementing are achieved; the method belongs to an active intervention safety measure; the active anti-explosion safety of the dry cleaning machine with the drying function is achieved; and the method is an active safety measure.

The invention provides a method for oxidizing ferrous sulfide into elemental sulfur and ferric oxide. The method comprises the following steps of adding water to the ferrous sulfide, and preparing a sizing agent, wherein the mass percentage concentration of the ferrous sulfide is 1-79.9%; performing oxidation treatment on the sizing agent, wherein the oxidizing time is 0.3-50h, sufficiently mixing the sizing agent in an oxidation process, and always controlling the temperature of the sizing agent to be 60-99.9 DEG C; and preparing the ferric oxide and the elemental sulfur. The technical scheme provided by the invention has the advantages of being low in cost, and developed in used equipment, and solves the problem that the temperature in the oxidation technology process of the ferrous sulfide is difficult to control. The used equipment can meet time requirements required for oxidization of the ferrous sulfide, and the method has high use values and high economic values.

The invention relates to an electrolytic tank interlock shutdown system and method; the system comprises a control unit, a first height sensor, a second height sensor, an anolyte elevated tank, a catholyte elevated tank, an electrolytic tank and a pipeline system, and the anolyte elevated tank and the catholyte elevated tank are connected with the electrolytic tank through the pipeline system; thecontrol unit is respectively connected with the first height sensor and the second height sensor, and is used for determining whether to send out an alarm signal or an interlocking shutdown signal according to the current liquid level height of the anolyte elevated tank, the current liquid level height of the catholyte elevated tank and the low liquid level alarm value, and cutting off the powersupply of the electrolytic tank according to the interlocking shutdown signal. The invention ensures the safety of the electrolytic tank after the interlocking shutdown is triggered.

The invention relates to the technical field of normal-pressure and low-pressure storage tank volatile organic compound safe collecting and discharging, and discloses a safety control method of storage tank VOCs discharging open flame equipment. The safety control method comprises the following steps of classifying and collecting of a storage tank group VOCs with various materials, communicating treatment of the storage tank VOCs with the same or similar materials, nitrogen sealing measure treatment of safe control of the storage tank group with various materials, discharging open flame equipment treatment of storage tank group VOCs with various materials and oxygen content measure treatment and emergency emptying measure treatment of safe control of the open flame equipment. According tothe safety control method, the gas-phase space of the storage tank can be effectively controlled to avoid forming an explosive environment, so that the risk of fire disasters in the storage tanks is reduced, moreover, an explosive gas can be prevented from being formed in a front pipeline of the open flame equipment to the largest extent, so that the absolute safety of open flame equipment is ensured. Meanwhile, the safety control method also realizes the treatment of the various material storage tank VOCs.

The invention discloses a high-voltage control system of a tunnel marine organism collection vehicle, which comprises a plurality of high-voltage control units respectively packaged in different box bodies of a protection level IP67 according to different functions, and each high-voltage control unit comprises a diesel generator unit, a power battery unit, a high-voltage control cabinet unit, a motor controller unit and a collection device control box unit; the beneficial effects of the invention are that all high-voltage control parts are respectively packaged in different box bodies with theprotection level of IP67 according to different functions, thereby forming all high-voltage control units, enabling all control units to be connected through cables with quick connectors, and avoiding the corrosion of a system caused by the moisture of marine organisms in a tunnel; a quick charging loop and a slow charging loop are integrated into one circuit, and a charging contactor K4 and a charging contactor K5 are set to be in a one-on-one-off structural form, so that the problem of flash explosion of hydrogen sulfide and ammonia gas in a tunnel caused by electric sparks generated by switching the quick charging loop and the slow charging loop when the circuit is not discharged thoroughly is avoided.

A special pulsed jet cloth filter for tail gas purification of a closed submerged arc furnace comprises an upper box body, a middle box body and an ash bucket, the upper end of the middle box body and the lower end of the upper box body are communicated through a pattern plate and a filter bag, the lower end of the middle box body is communicated with the upper end of the ash bucket, the upper box body and the middle box body are both of a cylindrical structure, and the ash bucket is of a conical structure. An ash removal rotating cover and an ash removal rotating nozzle are arranged in the upper box body and fixed to the lower end of the rotating shaft, a pipe shaft of an ash removal back-blowing pipe is perpendicular to the upper end face of the upper box body and arranged in the center of the upper box body, the ash removal back-blowing pipe is communicated with the upper box body, and a gear motor is fixed to the upper end of the ash removal back-blowing pipe in a sealed mode. The left side of the ash-cleaning back-blowing pipe is communicated with an ash-cleaning spray pipe of the nitrogen ash-cleaning device, the right side of the ash-cleaning back-blowing pipe is communicated with a gas conveying pipe of a back-blowing system, the overlook structure of the ash-cleaning rotary cover is fan-shaped or circular, and a surrounding plate perpendicular to the fan-shaped or circular surface is arranged on the periphery of the fan-shaped or circular surface.