77results about How to "Solving Governance Challenges" patented technology

The invention relates to a method for treating coal gasification wastewater containing phenol and ammonia. The method comprises the following steps: single tower alkali injection and pressurization steam stripping removal of acidic gas and ammonia, three-level dephlegmation of lateral line tapped gas, extraction of phenol by diisopropyl ether and solvent recovery. The cold and hot coal gasification wastewater, according to a certain proportion, respectively enters a pressurization single tower from the upper part and middle upper part of a wastewater steam stripping tower, and acid gas is discharged from the tower top; the lateral line withdrawal mixed gas goes through three-level dephlegmation to obtain high-concentration ammonia, alkali is injected at the position below the lateral line to transform fixed ammonia into free ammonia which is to be removed; counter-current extraction is carried out on removed ammonia, residue of acid gas and diisopropyl ether to dephenolize; extraction solvent is recovered by a solvent recovery tower and a solvent steam stripping tower to obtain the byproduct, namely crude phenol. In the method of the invention, the process removing acid gas, free ammonia and fixed ammonia is carried out simultaneously on the coal gasification wastewater in the wastewater steam stripping single tower, as a result, high-concentration ammonia is obtained, the content of carbon dioxide, sulfureted hydrogen, free ammonia and fixed ammonia in tower kettle purified water is extremely low, encrustment is not prone to take place, and the purified coal gasification wastewater meets the requirement of follow-up biochemical treatment.

The invention relates to a laneway disposing shape of a coal mine, in particular to a laneway disposed by using large U to sleeve small u, which solves the problems of driving along a groove and gas control of a stope in the prior laneway disposing mode. The laneway comprises a stope, a small u-shaped laneway is arranged at the periphery of the stope, the small u-shaped laneway comprises a belt laneway and a return airway which are arranged on both sides of the stope, the front side of the stope is provided with a cutting hole, a large U-shaped laneway is arranged outside the small u-shaped laneway and comprises a head-to-tail connection device, a ventilation laneway, a ventilation connection laneway and a gas tail laneway, wherein the head-to-tail connection device and the ventilation laneway are positioned outside the belt laneway, the ventilation connection laneway is arranged outside the cutting hole, the gas tail laneway is positioned outside the return airway, and a plurality ofentity supporting coal pillars are arranged between the large U-shaped laneway and the small u-shaped laneway. The laneway disposing shape solves the problem of gas control of the stope and increaseswork efficiency.

The invention discloses a method for treating coal gasification wastewater by single tower alkali injection and pressurization steam stripping, comprising the following steps: the cold and hot coal gasification wastewater respectively enters a single tower from the upper part and middle upper part of a wastewater steam stripping tower, gas ammonia is extracted from the lateral line of the single tower which goes through three-level dephlegmation to obtain high-concentration ammonia, condensate returns to a stock tank; alkali is injected at the position below the lateral line to transform fixed ammonia into ammonia which is to be removed; the mass percentage concentration of alkali liquor is 20-40%, the use level of the alkali liquor is not more than that of mol number of fixed ammonia in the wastewater, and residue is extracted from the tower bottom and is subjected to follow-up extraction and dephenolizing process of coal gasification wastewater. In the method of the invention, the process removing acid gas, free ammonia and fixed ammonia is carried out simultaneously on the coal gasification wastewater in the wastewater steam stripping single tower, as a result, high-concentration ammonia is obtained, the content of carbon dioxide, sulfureted hydrogen, free ammonia and fixed ammonia in tower kettle purified water is extremely low, encrustment is not prone to take place, pH value is reduced to around 6, as a result, fine extraction conditions are created for the follow-up solvent extraction dephenolizing of the coal gasification wastewater. The method of the invention is suitable for the coal gasification wastewater and overall treatment process thereof.

The invention relates to an advance grouting transformation method of bottom plate combination directional holes of deeply-buried aquifers underground a coal mine. The advance grouting transformationmethod includes the steps that the bottom plate combination directional holes are constructed, and comprise deflecting hole sections entering the aquifers from aquicludes and horizontal hole sectionsstarting from the deflecting hole sections and extending inside the aquifers; jet hole sections penetrating through one or more of the aquifers in an extending mode are constructed on the side walls of the deflecting hole sections at the preset interval, and the jet hole sections do not intersect with the horizontal hole sections in the aquifers and cover blind areas of the horizontal hole sections; and grouting is conducted on the horizontal hole sections and the jet hole sections to transform aquifer bottom plates into aquiclude bottom plates. According to the advance grouting transformationmethod, the problems that the distance from a coal seam is large, the number of the aquifers is large, the treatment effect of the coal seam bottom plates with the high water pressure is poor, the blind areas are prone to existing are solved, the advantages that the grouting covering area is wide, no blind area exists in treatment, and efficiency is high are achieved, advance area grouting transformation of the bottom plates of the multiple deeply-buried aquifers is achieved, and the technical guarantee is provided for safe stoping of a working face.

The invention movable type complete equipment for thermal desorption of polluted waste and a method. The complete equipment comprises a feeding module, a hot phase separation module, a discharging module, a water treatment module and a waste gas treatment module. The complete equipment fills up a vacancy in domestic thermal desorption advanced technology. The problem of governing polluted waste (soil) containing mercury, arsenic, organic matters, organic pesticides and the like can be solved rapidly and efficiently by the complete equipment for thermal desorption. The complete equipment for thermal desorption has the beneficial effects that environmental safety is good, the application range of a material is wide, and the thermal desorption temperature is low. The manner of condensation isadopted in the waste gas treatment module to recycle the organic matters, arsenic and mercury in the polluted waste (soil); reutilization of resources is achieved; higher energy recycling efficiencyis achieved; circulation inside the equipment is achieved after waste water is treated; natural gas or light diesel is adopted as the fuel; and pollutant content in the discharged tail gas is little.The movable type complete equipment for thermal desorption of polluted waste is more environmentally friendly and has a wide application prospect.

The invention relates to a process and complete-set apparatus for oil gas recovery and treatment. The complete-set apparatus for oil gas recovery and treatment comprises an oil gas collection device, a buffer gas-mixing tank, a vacuum pump, membrane assembly, a compression and condensation unit, a gas-liquid separation tank, a tube array heat exchanger, and a catalytic oxidation reactor. The process comprises that oil gases successively enter the buffer gas-mixing tank, a compressor and the compression and condensation unit; the compressed and condensed oil gases enter the gas-liquid separation tank for gas-liquid separation, and a gas phase is subjected to membrane separation in the membrane assembly; gases located at the permeate side of the membrane assembly pass through the vacuum pump, and then is compressed and condensed again; the concentration of the oil gases in gases located at the retentate side of the membrane assembly is reduced, and discharging is directly performed after the oil gas concentration reaches a standard; and if the concentration of the oil gases in the gases located at the retentate side still exceeds the standard, the gases enter the tube array heat exchanger to exchange heat with oil gases which are subjected to catalytic oxidation in the catalytic oxidation reactor, and the gases subjected to heat exchange enter the catalytic oxidation reactor, catalytic oxidation is performed under the action of a catalyst for removing organic materials in the gases, and at last discharging is performed after the oil gas concentration reaches the standard. The process and complete-set apparatus for oil gas recovery and treatment realize the high-efficiency recovery and treatment of the oil gases, and have certain industrial application prospect.

The present invention relates to biological stalk pesticide and its preparation process. The biological stalk pesticide is prepared through crushing stalk, gas explosion in a gas explosion chamber, adding water in the weight equal to the stalk, sterilizing in a high temperature steam treating chamber, microwave treating, cooling and spraying bacterial seed culture liquid, and solid fermentation in an aerobic fermenter to obtain the biological stalk pesticide. The biological stalk pesticide is used in killing termite, beetles and other pests in soil, and has the advantages of environment friendship, no residue, no pest's resistance, etc.

The invention discloses a sealing capsule and application thereof in a coal mine. The sealing capsule is a rectangular cubic air bag made of an antistatic flame retardant rubber material, and an inflation and deflation valve is arranged on the rectangular cubic air bag. The application method of the sealing capsule in the coal mine comprises the steps that sealing capsules corresponding in quantity are chosen according to the size and the length of a working surface, and are arranged 10 cm before an upper corner of the working surface in a single-row and multi-layer arranging manner to form a sealing capsule wall. The specific operation steps are as follows: a), a position is chosen precisely, b), the capsules arranged at the bottom are placed levelly, c), the inflation of the capsules arranged at the bottom is completed, d), the capsules arranged on the upper layer are laid, and e), the inflation of the capsules arranged on the upper layer is completed; when the working surface is advanced, f), the capsules arranged at the upper part are deflated, g), the capsules are moved integrally, and h), the capsules arranged on the upper part are inflated; therefore, one working cycle is completed.

The invention discloses a gasification wastewater disposing method and device through single-tower pressurizing stripping, which comprises the following steps: entering the extracted of acid gas or ammonia gas of cold and hot coal gasification wastewater from band lateral line in the stripping tower from top and upper top; blending gas; dividing phases; washing; separating light oil and acid gas; preparing liquid ammonia through two-grade concreting and refining; separating crude phenol and organic solvent from bottom of tower through inversed-extracting autoclave liquid and organic solvent; recycling organic solvent through stripping. The gasification disposing device contains oil acid gas / ammonia stripping tower, extracting tower, acid gas washing tower, solvent stripping tower, solvent recycling tower, oil-water separator, dephlegmator, pump and reservoir.

The invention relates to a method for treating nitrobenzene waste water. The method comprises steps of: step 1. according to a molar ratio, taking 50 parts of nitrobenzene waste water with a pH of 9-13 and adding 0.2-0.4 parts of sulfonating agent; step 2. adding 1-2 parts of ketone compound or acrylic acid compound into the nitrobenzene waste water for acetone sulfonation reaction; step 3. adding 2-4 parts of aldehyde compound or oxirane into nitrobenzene waste water for condensation polymerization; step 4. adding 450-950 parts of nitrobenzene waste water, continuing the condensation polymerization in step 3. for 0.5-1.0 h, thereby preparing a coal water slurry additive with an effective concentration of 0.5-1%. According to the method for treating nitrobenzene waste water of the invention, the coal water slurry additive is prepared in the waste water phase through solution polymerization, so as to avoid environmental pollution caused by discharge of nitrobenzene waste water and realize reuse of nitrobenzene waste water.

The invention belongs to a technical field of atmospheric air control and treatment of exhaust gas from coal fired boilers and relates to a method and a system for decarburization through complete combustion as well as desulfurization, denitration and dust removal of exhaust gas. The method for the invention includes the decarburization of 30% oxygen-rich gas in combustion. The invention also includes that sulfur trioxide as well as other mixed acid are formed in a reaction of 30%ozone-rich gas and sulfur dioxide and nitrogen oxides in exhaust gas with water containing PX purified liquid. Exhaust gas which is treated through desulfurization and denitration is soaked into a 100 nm-500 nm wet nano filter in water containing PX purified liquid for removal of PM 2.5 dust particles. Advantages: the decarburization through complete combustion is promoted by oxygen-rich gas and the desulfurization and denitration is promoted by ozone-rich gas. A wet nano filter is used for removal of PM 2.5 dust particles. Reaction products are acid liquid and superfine powder particles which can be used in industry and civil application. No desulfurized gypsum is generated and no sulfide or nitrides will be discharged. Thus the formation of atmospheric acid rain can be prevented; pollutions of PM 2.5 dust to atmospheric air can be solved through the dust removal. Collected 2.5 Mu m dust can be applied in an industrial material field as a material. Therefore, purposes of mineral resource saving and turning waste into wealth can be reached.