397 results about "Coke burner" patented technology

An improved corbel includes a first tier having first blocks and a second tier having second blocks. Each of the first blocks includes a first aperture extending through the block from a first surface to a back surface and a second aperture formed through a top surface of the block, extending into the first aperture. The first blocks are arranged on a substantially planar surface to align the respective first apertures to define a first passageway. Each of the second blocks includes a third aperture extending through the second block from a top surface to a bottom surface. The second blocks are disposed above the first tier to align the third aperture of each of the second blocks with the second aperture of the first blocks to form a second passageway.

The invention relates to a water heat-transfer shift process for by-product high-grade steam energy-saving deep conversion. According to the process, a primary water heat-transfer shift converter and a secondary shift converter are adopted, CO in feed gas reacts with H2O to generate H2 and CO2 under the catalysis of a Co-Mo (copper-zinc) catalyst, and CO in shift gas coming out of a shift system is less than or equal to 0.1% (dry basis). In the process, CO is subject to deep conversion, the feed gas (containing water gas, semi-water gas, natural gas conversion gas or coke-oven gas conversion gas) utilization rate is high, the shift catalyst is not overheated, and the catalyst has a long service life; meanwhile, by-product saturated steam with the pressure of 0.5 to 9.0 MPa is generated, sensible heat and latent heat in the shift gas are further recovered by deoxygenated water and desalted water, low-grade heat energy is converted into high-grade heat energy, cooling water consumption is reduced, the temperature of` the shift gas coming out of a process system is lower than or equal to 40 DEG C, equipment is few, the flow is short, the investment is small, and the resistance is low (less than or equal to 0.05MPa).

The invention relates a method and a device for recovering the waste heat of a coke oven crude gas. In the method, the refractory lining bricks of a riser are improved by using silicon carbide refractory lining bricks, a semiconductor temperature difference power generation module is arranged on the outer wall of the riser so as to use the coke oven crude gas in the riser as the heat source of a semiconductor temperature difference power generator, the riser serves as the heat collector of for semiconductor temperature difference power generation, and the waste heat recovery of the coke oven crude gas in the riser is realized. The method and the device of the invention have the advantages that: 1) the problem of recovering the waste heat of the coke oven crude gas in a coking process is solved; and 2) when the method and the device are used, the waste heat carried by the coke oven crude gas can be recovered for generating power and cooling hot water flowing out from a channel and for civil or industrial heating, cooling and heat production for saving energy and improving energy efficiency.

The invention discloses coking oven gas hydrodesulfurization catalyst and a method for preparing the same. The coking oven gas hydrodesulfurization catalyst is prepared by loading active components on the carrier of Gamma-Al2O3 with the immersion method. The active components comprises iron oxide, molybdenum oxide and cobalt oxide, wherein the weight of the iron oxide is 2-10 percent of the totalweight of the coking oven gas hydrodesulfurization catalyst, the weight of the molybdenum oxide is 5-20 percent of the total weight of the coking oven gas hydrodesulfurization catalyst, the weight ofthe cobalt oxide is 0.1-5 percent of the total weight of the coking oven gas hydrodesulfurization catalyst, and the balance is Gamma-Al2O3. The coking oven gas hydrodesulfurization catalyst has the characteristic of high hydrodesulfurization activity, less methanation reaction and CO disproportionation reaction and good thermal stability, etc.

The invention relates to a glaze for a furnace door lining brick of a coke furnace and an application method thereof. The technical scheme is as follows: the glaze for the furnace door lining brick of the coke furnace is prepared by uniformly mixing 50-65wt% of spodumene fine powder, 15-25wt% of cordierite fine powder and 20-30wt% of borax fine powder, and is filled into bags for later use. The application method of the glaze for the furnace door lining brick of the coke furnace comprises the following steps: firstly, preparing materials from the glaze for the furnace door lining brick of the coke furnace and water in a mass ratio of 1: (0.45-0.5); agitating for 0.4-0.6 hour to prepare material slurry; secondly, spraying the prepared material slurry on the surface of the furnace door lining brick of the coke furnace by using a spraying gun and coating for the thickness of 0.5-1mm; and closing a furnace door and keeping the heat under the condition of 950-1100 DEG C for 1-3 hours to generate the glaze on the surface of the furnace door lining brick of the coke furnace. The glaze for the furnace door lining brick of the coke furnace and the application method thereof have the advantages of low cost, simple procedures, convenience for construction and low glaze forming temperature; and the prepared glaze has good carbon deposition resistance and thermal shock resistance, and is applicable to the furnace door of the coke furnace.

The invention relates to a coke oven flue gas multi-pollutant dry purification device. The device consists of an evaporator I, a desulfurizer adding apparatus, a cloth bag dust collector, and a mediumand low temperature SCR denitration reactor. The evaporator I is a heat pipe type evaporator, the desulfurizer adding apparatus is connected to a desulfurizer grinding and conveying system, and the desulfurizer grinding and conveying system consists of a desulfurizer powder bin, a Roots blower and a desulfurizer pulverizer. The cloth bag dust collector includes a filter bag chamber, the filter bag chamber includes a dust remover ash hopper, a dust remover middle box and a purified air chamber that are disposed from the bottom up in order, the dust remover middle box is internally equipped with a tubesheet, a filter bag is disposed on the tubesheet, and a pulse dust-cleaning apparatus is disposed above the filter bag. An air outlet of the cloth bag dust collector is connected to an air inlet of the medium and low temperature SCR denitration reactor, an air inlet pipeline of the medium and low temperature SCR denitration reactor is internally equipped with an ammonia injection grid anda guide plate II, and a flue gas current equalizer, a catalyst reservation layer and a catalyst layer are disposed below the guide plate II in order.

The invention discloses a method for preparing coke by using direct coal-liquefied residue. The method comprises the following steps: S1, orderly carrying out primary hot melt-extraction, primary solid-liquid separation and polymeric modification on the direct coal-liquefied residue, so as to obtain coal-liquefied modified asphalt; S2, mixing the coal-liquefied modified asphalt with cleaned coal for coking, crushing, tamping and pressing into a cake, so as to obtain a coal briquette; and S3, conveying the coal cake to a coke burner to heat and insulate heat in isolated air, and then cooling and screening to obtain the coke. The coal-liquefied modified asphalt which is obtained from the direct coal-liquefied residue in manners of hot melt-extraction, solid-liquid separation and polymeric modification is applied to a tamping coking process, so that the coke of which all indexes achieve the first national metallurgical coke standard is obtained; the yield of qualified products can be up to over 82%.

The invention discloses a device and method for denitrifying flue gas of a coking furnace by using citric acid as a catalyst. The device comprises a cooling device, a desulfurization device and a denitration device. The method for denitrifying flue gas of the coking furnace by using the device comprises the following steps of cooling the flue gas of the coking furnace three times; desulfurizing the flue gas of the coking furnace; carrying out first-stage denitration on the flue gas of the coking furnace; carrying out second-stage denitration on the flue gas of the coking furnace; and discharging the purified flue gas. The method disclosed by the invention is safe, reliable, high in denitration and absorption efficiencies, little in influences to the suction force of a chimney, free of waste liquid discharge and capable of reducing the operation cost at the desulfurization stage; the obtained product does not contain poisonous ammonium sulphate; and the contents of SO2, NO and NO2 in the discharged flue gas are far lower than the national flue gas discharge standard.

The invention discloses a fine ferric oxide desulfurizing agent and a preparation method and an application method thereof. The fine ferric oxide desulfurizing agent is prepared from ferrous sulfate septihydrate, calcium hydroxide, copper sulfate pentahydrate, sodium hydroxide, bentonite and sodium carboxymethylcellulose through mixing, strip extrusion and drying, and comprises, by mass, 57%-68% of ferrous sulfate septihydrate, 18%-25% of calcium hydroxide, 3%-8% of copper sulfate pentahydrate, 6.5%-18% of sodium hydroxide, 3%-10% of bentonite and 1%-3% of sodium carboxymethylcellulose. The fine ferric oxide desulfurizing agent is applied to removal of natural gas, coke-oven gas, oil field gas, synthesis gas, methane, carbon dioxide and organic sulfur such as H2S, COS and mercaptan in liquid hydrocarbon feed gas under the normal-temperature anaerobic condition and is high in desulfurization precision and sulfur capacity. The environment-friendly fine ferric oxide desulfurizing agent is prepared without washing and filtering, and the preparation method has the advantages of simple production technology, low equipment investment and maintenance cost and suitability for large-scale industrial production.

The invention relates to a fine desulfurization agent of zinc oxide as well as preparation and application methods thereof. The fine desulfurization agent is prepared by the following steps of: carrying out mixing and strip extruding on activated zinc oxide, high aluminum powder, bentonite, calcium hydroxide and sodium carboxymethylcellulose, drying the materials at 120 DEG C, and roasting the materials at 500 to 650 DEG C. The initial mass percentage composition of the fine desulfurization agent is that the activated zinc oxide accounts for 62.5%-86%, and a mixture of the high aluminum powder, the bentonite, the calcium hydroxide and the sodium carboxymethylcellulose accounts for the balance; and the mixture comprises the following components according to mass percentage: 17%-32% of the high aluminum powder, 17%-22% of the bentonite, 13%-44% of the calcium hydroxide and 10%-47% of the sodium carboxymethylcellulose. The fine desulfurization agent is applied to purification of H2S in coke-oven gas, refinery dry gas, natural gas, synthesis gas, carbon dioxide, liquefied petroleum gas and liquid hydrocarbon feed gas in a range from a room temperature to 400 DEG C, and can be used for partially removing COS (carbon oxide sulfide) and sulfur alcohol in a range from 200 to 400 DEG C; and the H2S content at an outlet is less than or equal to 0.03 ppm, and the removing rates of the COS and the sulfur alcohol are more than or equal to 50%.

The invention relates to the technical field of refractory materials, and specifically relates to a binding material of a high temperature furnace body such as a coke oven and the like. The refractory binder is composed of the following raw materials (by weight): 45-55 parts of sintered corundum, 35-45 parts of silica sol, 4-8 parts of sodium tripolyphosphate and 15-27 parts of calcium aluminate cement. The refractory binder provided by the invention has good bonding effect and is not easy to fall off.

The invention relates to a process and a system for activated-carbon desulfurization and denitration of coke oven flue gas and comprehensive utilization of byproducts. The activated carbon is adoptedas a desulfurization adsorbent and a denitration catalyst of the coke oven flue gas, sulfur-rich gas generated by desulfurization is sent to a chemical production process of a coking plant for producing sulfur or ammonium sulfate, and powdered activated carbon which cannot be recycled is sent to a sewage treatment process of the coking plant as a high-efficiency adsorbent of coking wastewater, sothat the byproducts from activated-carbon desulfurization and denitration of the coke oven flue gas are recycled. Real desulfurization and denitration integration is realized, requirements of desulfurization and denitration indexes are met, and the activated carbon is environmentally friendly; the sulfur-rich gas generated by desulfurization is sent to the chemical production process of the cokingplant for producing sulfur or ammonium sulfate; ammonia is used as a reducing agent in activated carbon denitration, and the generated products are nitrogen and water, which can be directly discharged with flue gas; the worn powdered activated carbon is sent to the sewage treatment process of the coking plant as the high-efficiency adsorbent of the coking wastewater, and thus, comprehensive utilization of the desulfurization and denitration by-products of the coke oven flue gas is realized.

The invention discloses a bimetal ferromanganese low-temperature catalyst for selective catalytic reduction (SCR) denitration as well as a preparation method and application of the catalyst, and belongs to the fields of atmospheric pollution control technology and environment-friendly catalytic materials. The catalyst for the SCR denitration is prepared by adopting Fe(NO3)3, Mn(NO3)2 and citric acid reagents as main raw materials and adopting a sol-gel method. The catalyst is obtained by the steps of performing magnetic stirring in a water bath, performing drying treatment and performing roasting in an air atmosphere, the catalyst uses MnOx and FeOx as active components, wherein a mass ratio of component element Mn to component element Fe to a carbon source in the catalyst is (0.05-0.2):(0.8-1.2):(0.5-2), and the catalyst has an operating temperature of 120-200 DEG C. According to the technical solution provided by the invention, the method provided by the invention can significantly improve the denitration effect of the catalyst at a low temperature and facilitates prolonging the service life of the catalyst; and the catalyst provided by the invention has better stability of denitration efficiency at low temperature, and is suitable for promotion and applications in low-temperature SCR denitrification of sintering flue gas or coke oven flue gas.

The present invention discloses one kind of abrasive brick with high thermal shock resistance for use in dry quenching coke oven and its making process. The abrasive brick is made with the materials including silicon carbide 62-80 wt%, silicon nitride 17-35 wt%, inorganic adhesive 0.4-3 wt%, lanthanide oxide 0.1-0.8 wt% and ferric oxide impurity less than 1.0 wt%, and has high thermal shock stability and normal temperature pressure strength higher than 120 MPa. The making process includes the steps of mixing all the materials, pressing at 75-125 N/sq mm pressure to form adobe, stoving the adobe at 100-300 deg.c and final sintering in a kiln at 1380-1420 deg.c under the protection of nitrogen. The abrasive brick with high thermal shock resistance has long service life.

The invention relates to a coke dry quenching furnace castable used for in-suit generation of aluminium nitride, and a preparation method thereof. According to the preparation method, 45 to 65wt% of mullite, 15 to 35wt% of silicon carbide, 2 to 8wt% of aluminum powder, 0 to 5wt% of aluminium-silicon alloy powder, 0 to 2wt% of silicon powder, 4 to 6wt% of alpha-aluminium oxide micro powder, 2 to 4wt% of silicon micro powder, and 4 to 6wt% of calcium aluminate cement are taken as raw materials, a catalyst with an amount accounting for 0.1 to 0.3wt% of the amount of the raw materials, an anti-hydration agent with an amount accounting for 0.2 to 0.5wt% of the amount of the raw materials, and a water reducing agent with an amount accounting for 0.1 to 0.3wt% of the amount of the raw materials are taken as additives; aluminum powder, aluminium-silicon powder, the catalyst, and the anti-hydration agent are subjected to pre-mixing so as to obtain a premixed material; the premixed material, the water reducing agent, and the other raw materials are mixed and stirred to be uniform so as to realize in-suit generation of the aluminium nitride coke dry quenching furnace castable. The coke dry quenching furnace castable is excellent in middle temperature and high temperature mechanical properties, wear resistance, and thermal shock stability, is long in service life, is friendly to the environment, and is capable of saving energy, and is suitable for coke dry quenching furnace chute stand columns.

The invention discloses a method for replacing a safety valve of a boiler drum of a coke drying quenching boiler. According to the method, nitrogen gas is introduced into gas pipelines of a coke drying quenching furnace and a boiler, cold water cooling is performed in a water jacketing operation mode, meanwhile, the temperature of the coke drying quenching boiler is reduced quickly in a mode of making cold air enter from a manhole of the boiler and exhausting the cold air from an opening of the coke quenching furnace by utilizing gas buoyancy, and finally, the safety valve of the boiler drum of the boiler is replaced quickly; compared with the prior art, the method has the following beneficial effects that: (1) the time that the boiler drum of the boiler satisfies safety valve replacing conditions is shortened, and the conditions required for replacing the safety valve of the boiler drum of the boiler are satisfied within eight hours; and (2) the accident handling time can be shortened and the production loss can be reduced by the method.

The invention provides a method for co-production of synthetic ammonia and LNC (liquefied natural gas) by coke gas, which is high in raw material utilization ratio. The method comprises the steps as follows: semi-water gas and purified coke gas are mixed and fed into a conversion unit, and then enters a low-temperature methanol washing unit for purification treatment; purified gas after purification treatment enters a two-in-one cooling box consisting of a liquid nitrogen washing unit and a cryogenic device, is further purified in the two-in-one cooling box and is configured into pure synthesis gas finally, and a ratio of H2 to N3 in the pure synthesis gas is 3:1; and the pure synthesis gas enters a synthetic ammonia unit to generate synthetic ammonia, and exhausted gas generated by the synthetic ammonia unit returns the two-in-one cooling box device to generate an LNG product. According to the method for co-production of synthetic ammonia and the LNC by the coke gas, methane in the purified coke gas and the semi-water gas and methane in the exhausted gas generated during the synthetic ammonia production process are separated out to produce the LNG, then residual available gas is utilized to produce synthetic ammonia, and the method has the advantages of short technological process and high virgin gas utilization ratio.

The invention relates to a system and a method for realizing stable and high yield of dry quenching steam. The system comprises a dry quenching system, an air forced blowing system and a combustible gas supply distribution system, the air forced blowing system comprises a forced air blower and a main air blowing pipeline; the combustible gas supply and distribution system comprises a combustible gas main pipeline, a combustible gas branch pipeline and a combustible gas distributor; the influence of dry quenching system faults or coke oven overhaul and maintenance on the dry quenching steam yield can be effectively eliminated, and the dry quenching steam yield is stabilized and improved; in addition, the problem of equipment investment waste caused by low operation load of a single set of dry quenching equipment when a full dry quenching process is adopted can be solved, and meanwhile, damage possibly caused by long-time low-load operation of a dry quenching boiler is avoided.