36results about How to "Reduce the number of shutdowns" patented technology

The invention discloses a spraying and washing process of an ammonium sulfate crystallizer by a non-saturator method, comprising the steps of: spraying and washing the ammonium sulfate crystallizer by ammonia still stronger ammonia water obtained by an ammonia distillation process; washing the attachment on the inner surface of the ammonium sulfate crystallizer; and controlling the acidity of the circulating mother liquor in the ammonium sulfate crystallizer. The mass concentration of the ammonia still stronger ammonia water is 3-6% at 40-55 DEG C. The invention has the maximum advantage of combining the ammonium sulfate crystallizer by non-saturator method with technical characteristics of ammonia distillation, washing ammonium sulfate crystal and attachment on the inner surface of the washing crystallizer by temperature of ammonia and stronger ammonia water in ammonia evaporation stronger ammonia water generated by ammonia distillation and neutralizing a part of free acid in the ammonium sulfate liquor in condition that the production flow does not change. The invention is beneficial to optimize and improve the ammonium sulfate crystallization process and comprehensively utilizing ammonia resources as an important means of energy conservation and emission reduction.

The invention discloses a process for on-line cleaning to a double rotational flow gas burner. The process comprises the following steps: A), determining a purging medium; B), determining purging loops and the quantity thereof before the burner; C), distributing and determining the quantity of the purging branch pipe loops of a swirl plate spray nozzle set inside the burner; D), determining the quantity N of the purging branch pipes of a swirl plate spray nozzle of the burner according to the quantity N of swirl plates, and then accessing N spray nozzles, so as to form a spray nozzle set purging loop component; E), selecting the model of and making a swirl plate purging spray nozzle of the burner; F), determining the fixing way of the swirl plate purging spray nozzle of the burner and a pipeline; G), controlling and designing of the valve of a purging pipeline; and H), running test: 1, nitrogen purging; and 2, water purging. The process provided by the invention has a reasonable structure, can be used for on-line cleaning to the blockage of the swirl plates of the double rotational flow gas burner, can enable the continuous operating period of the burner to be prolonged greatly, and prolongs the service life of the double rotational flow gas burner; and on-line running and operation are simple, and system maintenance is small.

The invention provides a rare earth electrolytic cell repair paste and a non-stop repair method, which relate to the technical field of rare earth electrolysis, and include a binder and a dry material at a ratio of 1:3 in parts by weight; wherein the dry material includes The following components in parts by weight: 20-27 parts of graphite powder, 51-55 parts of anthracite powder and 18-26 parts of rare earth fluoride powder; , form a protective layer with a dense structure, and its own oxidation consumption is slow, and it has strong corrosion resistance to the fluoride salt melt in the rare earth electrolytic cell. Due to the existence of the repair paste, the upper edge of the graphite tank is isolated from the air to avoid Or delay the further oxidation loss of the upper edge of the graphite tank body, effectively prolonging the service life of the graphite tank of the rare earth electrolytic tank.

The invention relates to an emergency blowout control method for a large slab heating furnace. The emergency blowout control and alarm of the slab heating furnace is realized by the steps of reasonably selecting automatic blowout conditions and technological parameters, setting a blowout interlocking plant and a movement time sequence, changing the control mode for the coal gas control valve, adding a sound alarm for the low-pressure blowout alarm signal of coal gas, air and instrument air in the blowout procedure, and popping up an alarm picture. The invention has obvious effect on the heating furnaces of hot-strip 1700 mm and 1780 mm production lines. Even when coal-gas low pressure, combustion-fan power-fail, instrument-air low pressure, evaporation cooling system power-cut and other faults occur, no safety or equipment accident happens. Thus, the invention greatly reduces the frequency and time of heating furnace blowout and creates favorable conditions for smooth steel rolling production and yield enhancement.

The invention provides an integral type water cooling bottom part ring of a combination holder of a closed submerged arc furnace and a process for producing the same. The bottom part ring consists of an inner side stainless steel ring-shaped plate (1), a water cooling protection sleeve insulated plate ring plate (2), a semi-circular ring body (3), a contact element protection support ring plate (4) and a clapboard (6), wherein the inner side stainless steel ring-shaped plate(1) is in welding connection with the stainless steel ring plate (2) and the contact element protection support ring plate (4); and the circular ring body (3) is in welding connection with the ring plate (2) and the contact element protection support ring plate (4) so as to form the integral type water cooling bottom part ring. The bottom part ring has the advantages of solving the problems of water leakage due to frequent poking and frequent shut-down of a furnace for exchange, meeting the operating requirements in the production of the combination holder of the closed calcium carbide furnace, effectively improving the quality of an electrode pole, greatly improving the use effect of the holder, fully meeting the requirements on protection and guide of an electrode pole electric conduction device, and avoiding water leakage phenomenon occurring while in use, along with better economical efficiency; moreover, the bottom part ring also has the advantages of greatly prolonging the service life and greatly lowering the frequency of the shut-down of the furnace due to the fault of the bottom part ring.

The invention discloses a gypsum powder airflow separator, which belongs to the gypsum powder production equipment. The technical problem to be solved by the invention is how to avoid the accumulation of large particles at the bottom of the boiling furnace, ensure the boiling effect, improve the quality of the gypsum powder, and at the same time reduce the times of cleaning the furnace, To reduce the labor intensity of workers and improve the work efficiency, the technical scheme adopted is as follows: the structure includes an airflow separation cylinder, a feed cylinder is arranged at the lower end of the airflow separation cylinder, a discharge cylinder is arranged at the upper end of the airflow separation cylinder, and an upper middle part of the airflow separation cylinder is arranged. The position is provided with a material blocking cylinder, a wind blocking structure is set between the outer side wall of the material blocking cylinder and the inner side wall of the airflow separation cylinder, and a large particle outflow structure is set at the lower position of the middle part of the airflow separation cylinder, and the inlet end of the large particle outflow structure is located in the airflow. At the lower position in the middle of the separation cylinder, the outlet end of the large particle outflow structure is located at the obliquely lower position outside the air separation cylinder.

The invention discloses firm can plastic and a preparation method thereof. The firm can plastic comprises the following components in percentage by mass: 80 to 90 percent of a mixture of silicon carbide and mullite, 2 to 12 percent of silicon-containing micropowder of which the particle size is less than 2,200 meshes and 8 to 18 percent of low-temperature agglutinant, wherein the silicon carbide accounts for 5 to 15 percent of the mixture and the mullite accounts for 85 to 95 percent of the mixture. The preparation method comprises the following specific steps of: sequentially mixing for the first time, bundling, mixing for the second time, extruding, blanking and packing by taking the mullite and silicon carbide as a matrix material, and phosphoric acid and aluminium phosphate as a bonding agent. The firm can plastic has the advantages of effectively prolonging the service life of a refractory material, effectively improving the reliability of the refractory material, reducing the consumption and blowing out times of the refractory material, being used under the working condition of a dry coke quenching furnace, increasing the economic benefit and saving resources, along with high wear resistance and high compressive strength and compactness at normal temperature. The preparation method has the advantages of capability of improving the quality of the product, simple process and easy operation.

The invention relates to a production method of silicate, and provides a long-service-life honeycomb heat accumulator, which is used for solving the problem of short service life caused by the conventional unreasonable product formula. The long-service-life honeycomb heat accumulator is prepared from the following raw materials in percentage by weight: 62-85 percent of aluminum oxide, 8-17 percent of zirconite, 3-12 percent of Datong clay, 0.5-1.5 percent of magnesia serving as a fluxing agent, 0.6-1.8 percent of silicon micropowder, 0.8-2.5 percent of bonding agent and 1.5-3.5 percent of glycerol. The method comprises the following steps of: fully mixing the raw materials into pug; mulling the pug in vacuum, and molding; drying at the temperature of 150 DEG C for 10-15 hours; and firing in a high-temperature furnace at the temperature of 1,350-1,450 DEG C for 4-5 hours to generate a honeycomb heat accumulator of which the main crystal phase is corundum, wherein reducing flame is adopted at the temperature of below 800 DEG C in the firing process, and oxidizing flame is adopted at the temperature of over 800 DEG C to the end of the firing process. The production process is easy to control, and the honeycomb heat accumulator has the advantages of high thermal stability and high strength.