Raw material pretreatment process for preparing sulfuric acid by using low-quality sulfur and sulphur-bearing waste solution

The invention relates to a raw material pretreatment process for preparing sulfuric acid by using low-quality sulfur and sulphur-bearing waste solution which are generated through wet oxidation sweetening of coke oven gas. The raw material pretreatment process comprises the following steps of: 1) incinerating the sulfur and the waste solution; 2) recovering waste heat; and 3) performing wet purification. A raw gas prepared by the process meets the requirements on preparing the sulfuric acid, and the sulfuric acid prepared by combining the existing wet method contact transformation and condensation cooling processes not only can be used as a raw material for producing ammonium sulfate by an ammonium sulfate device of a factory, but also can be used as commercial sulfuric acid for export sales, so the dual goals of resource recycling and environmental protection are realized.

Double u-shaped pipe tamping coke oven dust remove smoke guide trolley

This invention relates to a double U tube, tamping cokery de-dust fume- led vehicle, it includes vehicle body, fume-led cover opening device, double U-bend system, riser clearing device, high and lowpressure switch and riser water lute cover, operating device of valve body. Double U-bend system including U-mode fume-led tube located side of vehicle body, U-mode fume-led tube located in middle ofvehicle body. The U-bend connect coaling burning room fume -led hole and coking latter burning room fume-led hole that located at both sides of coaling burning room. Comparing with common tamping cokery de-dust fume-led vehicle, this invention possess merits of regulation agility, control precision, overhaul convenience, structural arrangement reasonable, energy conservation effect notability, nosmoke divulging and so on.

Method for increasing air tightness of coke oven top and oven top structure

The invention relates to a method for increasing air tightness of a coke oven top and an oven top structure. The coke oven top is divided into two structures of an oven top upper portion and an oven top lower portion, wherein the oven top upper portion and the oven top lower portion are respectively built as independent whole bodies, and a sliding layer is arranged between the oven top upper portion and the oven top lower portion; when an oven is dried, after the over top upper portion and the oven top lower portion are respectively swelled, mortars are grouted via a grouting hole on the oven top upper portion to fill a top gap on the oven top upper portion and a gap between the oven top lower portion and a big protective plate so as to prevent mutual leakage between adjacent carbonization chambers and assure the leakproofness of the coke oven. The invention has the advantages that the situation that the oven top upper portion is swelled together with the oven top lower portion to cause ...

Technique and equipment for preparing sulfuric acid by using sulfur and waste liquid generated from coal gas wet type oxidation sweetening technique

This invention relates to method and apparatus for preparing sulfuric acid by using sulfur and waste solution generated in wet oxidation desulfurization of coal gas. The method comprises: mixing sulfur and sulfur-containing salt solution, incinerating wastewater, recovering waste heat, dry-cleaning, wet-contact-converting, and condensing. The apparatus comprises: an incineration unit, a waste heat recovery unit, a dry-type purification unit, a wet-type contact conversion unit, and a condensation unit, while does not comprise drying unit or tail gas treatment unit. Only one dry-type high-temperature purification deduster is used for dry purification, thus the purification process is simplified. The method has low cost, and no waste solution discharge.

Smoke-guide dedusting car of U-shaped pipe

The invention discloses a smoke-guide dedusting car of a U-shaped pipe, comprising a car frame body, a smoke-guide device of the U-shaped pipe, a sweeping device of an ascending pipe, a hydraulic system and an electric control system. The smoke-guide dedusting car of the U-shaped pipe is characterized in that the smoke-guide device of the U-shaped pipe is provided with a door type rack, the innerside of a door frame of the door type rack is provided with a lifting guide rail, and V-shaped iron is arranged on the guide rail; a lifting rack is arranged below the door type rack and comprises anupper transverse beam, a lower transverse beam, a left support beam and a right support beam, the transverse beams and the support beams are all in a box type structure, the upper transverse beam is connected with the door type rack by a lifting device, and the lower transverse beam is connected with a bolt on the upper end face of the U-shaped smoke-guide pipe; clamping and grabbing devices are arranged ...

Coking method and coke oven for efficiently recycling heat of exhaust gas

The invention relates to a method and a coke oven for recycling heat of exhaust gas from the coke oven, which belong to the field of metallurgy coking. In the method, air is preheated by a double-pipe heat exchanging device; the double-pipe heat exchanging device is arranged in a lower radiation chamber of an exhaust gas channel; air enters from the lower inlet of an inner pipe of the double-pipe heat exchanging device, rises to an outer pipe seal head and returns into a downstream channel so as to finish heat exchange between air and hot exhaust gas; heat-exchanged hot air enters an air distribution chamber and enters a vertical flame path of a combustion chamber from the air distribution chamber; a plurality of sections of air supply devices are formed in the vertical flame path of the combustion chamber and provided with a plurality of air introducing ports of different heights in the height direction of the vertical flame path; a coal gas nozzle of the coke oven is arranged at the bottom ...

Method capable of adjusting heating uniformity of coke oven in length direction from lower portion and oven body structure

The invention relates to a method capable of adjusting heating uniformity of a coke oven in a length direction from a lower portion and a novel oven body structure. The invention is characterized in that a grate brick capable of adjusting gas passing section area is arranged at the bottom of a top heat storage chamber of a small flue and the sizes of holes of the grate brick are adjusted by adding or subtracting adjusting bricks to or from the holes of the grate brick at a cellar. Each heat storage chamber is divided into a plurality of unit cells along the length direction; and each heat storage chamber is divided into multiple gas channels in the length direction. Coal gas and air are supplied from the same side of the small flue of the heat storage chamber; namely, the coal gas and the air are both supplied from a small flue at a coke side or a small flue at a machine side. The invention has the advantages that the problem of heating uniformity in the length direction of the coke oven ...

Technique and equipment for preparing sulfuric acid by using sulfur and waste liquid generated from coal gas wet type oxidation sweetening technique

This invention relates to method and apparatus for preparing sulfuric acid by using sulfur and waste solution generated in wet oxidation desulfurization of coal gas. The method comprises: mixing sulfur and sulfur-containing salt solution, incinerating wastewater, recovering waste heat, dry-cleaning, wet-contact-converting, and condensing. The apparatus comprises: an incineration unit, a waste heatrecovery unit, a dry-type purification unit, a wet-type contact conversion unit, and a condensation unit, while does not comprise drying unit or tail gas treatment unit. Only one dry-type high-temperature purification deduster is used for dry purification, thus the purification process is simplified. The method has low cost, and no waste solution discharge.

Vacuum carbonate method coal gas desulfurization processes and apparatus thereof directly utilizing deserted coal gas residual heat as desorption heat source

Desulfuration waste liquid treatment process and equipment

The invention relates to a desulfuration waste liquid treatment process, in particular to a desulfuration waste liquid treatment process and equipment thereof. The desulfuration waste liquid is treated by adopting a heating hydrolysis mode in the process, namely the desulfuration waste liquid is conveyed into a closed hydrolysis reactor, cyanide in the desulfuration waste liquid is hydrolyzed into non-toxic or low-toxic compounds such as formate, ammonia and the like at a certain temperature under a certain pressure, and the hydrolyzed products are directly conveyed to an ammonia still. The process has the advantages that: due to primary treatment of the desulfuration waste liquid before evaporating the ammonia, the cyanide content of the desulfuration waste liquid is effectively reduced, and the cyanide content of the ammonia evaporation wastewater after the desulfuration waste liquid is blended is close to the index before the desulfuration waste liquid is not blended; and the wastewater ...

Oxidizing air and coke oven high-temperature waste gas heat exchange device

The invention relates to an oxidizing air and coke oven high-temperature waste gas heat exchange device, which belongs to the field of metallurgic coking. The device is a double-tube heat exchange device which is positioned in a radiation chamber at the bottom of a waste gas duct which is outside the radiation chamber; the double-tube structure of the device consists of an inner tube and an outertube, the lower part of the inner tube is an air inlet, the top end of the inner tube is communicated with the outer tube, and the upper part of the outer tube has a plug structure; an annular channel formed between the inner tube and the outer tube serves as a downward channel for the air undergoing heat exchange; an air distribution chamber is formed on the lower part of the double-tube heat exchange device, and the downward channel of the air undergoing heat exchange is communicated with the air distribution chamber; the air distribution chamber is communicated with a vertical flame path in the ...

Thermal conduction molded coal moisturizing method with coke oven tail gas as carrying gas, and apparatus thereof

The invention relates to the technical field of coke oven coking coal moisturizing and drying, and discloses a thermal conduction molded coal moisturizing method with a coke oven tail gas as a carrying gas, and an apparatus thereof. The method comprises the following steps: 150-260DEG C coke oven tail gas from the chimney of a coke oven and coal dust containing 10-15% of water simultaneously enter a steam tube rotary dryer, and go through a heat exchange tube introduced with steam to full contact, heat exchange and drying until the coal dust contains 6-8% water in order to obtain coking coal. A coal dust buffer bin is connected with the feed screw at the front end of the steam tube rotary dryer through a metering belt conveyer, and the tail end of the steam tube rotary dryer is provided with a discharge screw conveyer; and a coke oven tail gas fan is connected with the feed screw at the front end of the steam tube rotary dryer through a pipeline, the tail end of the steam tube rotary dryer ...