41results about How to "Solve clogged pipes" patented technology

The invention discloses a steady-state device and method for industrially synthesizing hydrogen sulfide gas. The device comprises a liquid sulfur storage and transportation unit, an H2 input unit, anH2S synthesis unit, an H2S purification unit and an H2S cooling and storage unit. The liquid sulfur storage and transportation unit and the H2 input unit are respectively connected with the H2S synthesis unit, the H2S purification unit is connected with the H2S synthesis unit, and the H2S cooling and storage unit is connected with the H2S purification unit. According to the invention, the continuity, stability and system intrinsic safety of industrial production are taken as starting points, hydrogen and sulfur are taken as raw materials, and the long-period steady-state production of high-purity hydrogen sulfide is realized through process configuration. The device and the technology disclosed by the invention have the characteristics of few system byproducts, strong energy-saving and environment-friendly properties, low unit consumption of a hydrogen sulfide product, excellent system operation economy and the like.

The invention relates to a melting treatment method for waste incineration flying ash, and belongs to the technical field of environmental engineering. The treatment method comprises the following steps of carrying out pretreatment on the waste incineration flying ash to form treated flying ash; uniformly mixing the treated flying ash with sludge to form a mixture of the flying ash and the sludge; carrying out solidification and stabilization on the mixture of the flying ash and the sludge to form a solidified body; and carrying out melting treatment on the solidified body. The treatment method can effectively solve the problems that the caloric value in the flying ash is relatively low, and heavy metals in the flying ash are liable to volatilize, so that pipeline blockage in a flying ash conveying process is avoided; and the melting treatment method is good in treatment effect, is low in cost, is free from secondary pollution, and is high in resource utilization.

The invention discloses a method for treating blockage of a regulating valve at an entrance of a spray gun in a urea ammonia production system. The method for treating the blockage of the regulating valve at the entrance urea spray gun in the urea ammonia production system comprises the following steps: comprehensively determining that blockage is caused by virtue of low urea solution flow of a urea solution regulating valve according to show value of a flow meter and experience, taking down the urea flow regulating valve (2), and washing a valve element of the urea flow regulating valve (2) with water at the temperature of 80-100 DEG C; mounting one compressed air hose between a compressed air inlet pipe (6) and a urea flow regulating valve outlet pipe (7), opening a compressed air inlet valve (4), and purging with compressed air at 0.2-0.6MPa; adjusting a position of an interface at one end of the compressed air hose from the urea flow regulating valve inlet pipe (7) to a urea flow regulating valve outlet pipe (8), and sweeping according to a previous operation step; and then repeating operation in the second step. The method for treating the blockage of the regulating valve at the entrance urea spray gun in the urea ammonia production system has the advantages that the problem that a pipeline and a valve are blocked by crystallized urea can be solved, flue gas denitrification efficiency is improved, and practicability is strong.

The invention discloses an oxalic acid conveying device. The oxalic acid conveying device comprises a box, a box cover and a plurality of separation plates. The box is formed by an upper side plate, a lower side plate, a left side plate, a right side plate and a rear side plate in a surrounded mode. The box cover covers a front side box opening of the box in a seal mode. The separation plates are arranged up and down and welded in the box. The box is divided into a plurality of areas by the separation plates. A heating plate is installed in each area. A gas inlet connector used for leading in nitrogen gas is arranged in the position, close to the bottom end, of the left side plate or the right side plate of the box. The separation plates are provided with ports for ventilation. A gas outlet connector is arranged on the upper side plate and is provided with a gas channel used for communicating with a furnace liner reaction cavity of a debinding furnace. According to the designed oxalic acid conveying device, supply of a gas oxalic acid catalyst is achieved, thus the debinding furnace decomposes polyformaldehyde through gas oxalic acid as the catalyst, the problem that oxalic acid can enter the debinding furnace after sublimation in the catalytic debinding process is solved, so that conveying supply can also be completed without the usage of compressed air.

The invention provides a vertical type tubular reactor for deenergization and alkali hydrolysis of TNT (Trinitrotoluene). The vertical type tubular reactor comprises a heat insulation tube, wherein the heat insulation tube is internally connected with a disc-shaped alkali hydrolysis reaction tube through a fixed bracket; the disc-shaped alkali hydrolysis reaction tube is spirally arranged in the heat insulation tube; a spiral shaft and the heat insulation tube are coaxially arranged; an alkali liquid spraying pipe is embedded into the disc-shaped alkali hydrolysis reaction tube; the alkali liquid spraying pipe and the disc-shaped alkali hydrolysis reaction tube are coaxially arranged; a plurality of micro-pores are formed in the alkali liquid spraying pipe; the heat insulation tube is vertically arranged; a heat insulation medium adopts heat insulation water; the heat insulation water enters from a bottom water inlet of the heat insulation tube and then is discharged from a top water outlet; the disc-shaped alkali hydrolysis reaction tube is a TNT alkali hydrolysis reaction region; the TNT enters from a top feeding opening of the disc-shaped alkali hydrolysis reaction tube and alkali liquid is sprayed out from the alkali liquid spraying pipe; after reaction, the TNT is discharged from a discharging opening formed in the bottom of the disc-shaped alkali hydrolysis reaction tube;a flowing direction of heat insulation water is opposite to the flowing direction of a reaction solution in the disc-shaped alkali hydrolysis reaction tube. By adopting the vertical type tubular reactor, the treatment efficiency of abandoned propellant and explosive is improved; meanwhile, the safety is improved.