182results about How to "Improve the site environment" patented technology

The invention discloses a water-containing sludge treatment method which comprises the following steps of: conveying sludge into a sludge drying machine, heating and drying; conveying semi-dry sludge into a sludge incinerator; introducing air into the sludge incinerator after passing through an ignition device; enabling high-temperature smoke generated by incinerating sludge to pass through a waste heat recycling device, and then discharging the high-temperature smoke to the air through a smoke purifying and dust-removing system; and conveying residues generated by incinerating the sludge to an ash storage bunker. The semi-dry incineration of the sludge adopts the mode that the sludge directly passes through the sludge drying machine to reach a low-dryness and semi-dry degree and then enters the incinerator for being incinerated; and in the drying process, no full-dry sludge is generated, and the back-mixing operation is not needed. The water-containing sludge treatment method has the advantages that developed and reliable sludge drying and incineration devices are adopted, thus a system has high operation reliability; the dry sludge back-mixing operation is not needed for a semi-drying system, thus the dust quantity is low and the oxygen content and temperature are low during operation, the system is high in safety, and inert gas protection is not needed; and the whole system does not generate dust and odor during operation, and is environmental-friendly.

The invention discloses a method for preparing a steel-based copper-alloy thermometal spherical bearing seat blank which is produced on a vertical centrifugal casting machine comprising an electric induction heating device and a cooling device. The preparation method sequentially comprises the steps that a steel shell of a bearing seat is preprocessed, and the preprocessed steel shell is placed on a rotary table of the vertical centrifugal casting machine; technological quantity of copper-alloy particles are added in the steel shell, and the rotary table is started; the heating device is started for heating to enable the copper-alloy particles to be molten; the steel shell is cooled to enable the molten copper-alloy to be solidified and metallurgically-bonded on the surface of the inner sphere of the steel shell to obtain the steel-based copper-alloy thermometal spherical bearing seat blank. The method has the advantages that the technological procedure is short, device investment is little, manufacturing cost is low, labor intensity is low, and the on-site environment is good.

The invention discloses a vertical cooling and waste heat recovery furnace for sinters, which comprises a feeding hopper and a discharge hopper, wherein the feeding hopper and the discharge hopper are respectively communicated with the top and the bottom of a cooling chamber; first and second air ducts are sequentially sleeved in the cooling chamber; the walls of the first and second air ducts are respectively provided with a plurality of air outlet holes; the top of the first air duct is provided with a cone distributor; the bottom of the second air duct is communicated with a cold air inlet pipe; the cooling chamber is provided with an inner sleeve; a plurality of vent holes are distributed in the wall of the inner sleeve; a hot air collecting cavity is formed between the inner sleeve and a housing of the cooling chamber; the upper part of the hot air collecting cavity is communicated with a hot waste gas exhaust pipe; and the bottom of the hot air collecting cavity is communicated with the discharge hopper. The invention provides a cooling system integrating sinter cooling with closed hot flue gas recovery and waste heat utilization; the vertical cooling and waste heat recovery furnace for the sinters operates under a negative pressure in the cooling process; emission of pollutants can be greatly reduced; the field environment is improved; and the heat recovery rate is improved.

The invention relates to the improvement and fertility betterment of farmland soil, particularly disclosing a fertility-betterment type soil-conditioner and the preparation method thereof. The soil conditioner is made by the following raw material of different weights: 50 to 55 portions of alkaline residue, 32 to 35 portions of peat, 12 to 14 portions of light-burned dolomite and 3 to 4 portions of ammonium bicarbonate. The preparation method is that the alkaline residue, the peat and the ammonium bicarbonate are mixed by the above weight proportion and stirred and accumulated for 5 to 7 days. Then the light-burned dolomite with the above weight proportion is added. At last, the soil conditioner is grinded and bagged. The soil conditioner of the invention has the advantages of good exterior, stable physicochemical characters, no moisture absorption and non-lumping, which can be widely used for improvement and fertility betterment of the southern acid soil and supplies balanced calcium, magnesium, and other nutrients for the crops.

The invention provides a sulfur recovery technology realizing low sulfur emission. The sulfur recovery technology comprises a combustion furnace, a first-stage Claus reactor, a second-stage Claus reactor, a selective hydrogenation reduction reactor, a selective oxidation reactor and two adsorption desulfurization towers capable of being connected in series or parallel, and the devices are sequentially connected in series; the total sulfur conversion factor of process effluent gas is that SO2 is smaller than or equal to 10 mg/m<3> through proper selection of various catalysts and desulfurizers and accurate control of process conditions of steps. The desulfurizers after breakthrough are subjected to in-situ thermal regeneration by inert gas at the temperature of 250-300 DEG C, regenerated outlet gas returns to the combustion furnace, a condenser I behind the combustion furnace, a condenser II behind the first-stage Claus reactor, a condenser III behind the second-stage Claus reactor, a condenser IV behind the selective hydrogenation reduction reactor or a condenser V behind the selective oxidation reactor, sulfide such as elemental sulfur, H2S,SO2 and the like in the regenerated gas is recovered, and the total sulfur conversion factor of exhaust tail gas in the regeneration period of the desulfurization towers is that SO2 is smaller than or equal to 10 mg/m<3>. The sulfur recovery technology realizing low sulfur emission has the advantages of the low sulfur emission, the long-term operation of the desulfurizers, the high desulfurization capacity, the small number of replacement times, the low expenses and the like.

The present invention provides a low sulfur emission sulphur recovery process, which comprises a burning furnace, a first stage Claus reactor, a second stage Claus reactor, a selective hydrogenation reduction reactor, a selective oxidation reactor, and two adsorption desulfurization towers capable of being connected in a series parallel connection manner, wherein the burning furnace, the first stage Claus reactor and the second stage Claus reactor are sequentially connected in series. According to the present invention, with the appropriate selection of each catalyst, the appropriate selection of the desulfurization agent, and the accurate control of each step process condition, the total standard sulfur in the process emission gas is that SO2 is less than or equal to 10 mg/m<3>; after the desulfurization agent penetrates, 250-300 DEG C inert gas is used to perform in-situ thermal regeneration, the regeneration outlet gas returns to the burning furnace, the condenser after the burning furnace, the condenser after the first stage Claus reactor, the condenser after the second stage Claus reactor, the condenser after the selective hydrogenation reduction reactor, or the condenser after the selective oxidation reactor to recover elemental sulfur, H2S, SO2 and other sulfides in the regeneration gas, and the total standard sulfur in the evacuation tail gas during the desulfurization tower regeneration process is that SO2 is less than or equal to 10 mg/m<3>; and the low sulfur emission sulphur recovery process has advantages of low sulfur emission, long desulfurization agent operating, high desulfurization capacity, less replacement frequency, low cost and the like.

The present invention provides a low concentration acid gas low-sulfur emission sulphur recovery process. According to the present invention, low concentration acid gas having a H2S content of less than 5% is treated by a selective oxidation reactor and two adsorption desulfurization towers capable of being connected in a series parallel connection manner so as to achieve the desulfurization purpose; a H2S selective oxidation catalyst is filled in the selective oxidation reactor, and a thermal renewable catalytic oxidation adsorption desulfurization agent is filled in the adsorption desulfurization tower; with the appropriate selections of the catalyst and the desulfurization agent, and the accurate control of each step process condition, the total standard sulfur in the process emission gas is that SO2 is less than or equal to 10 mg/m<3>; with the thermal regeneration, the service life and the desulfurization capacity of the catalytic oxidation adsorption desulfurization agent are substantially improved; and the process has advantages of low-sulfur emission, sulphur recovery rate of close to 100%, long desulfurization agent service life, high desulfurization capacity, less replacement frequency, low cost, good desulfurization agent unloading and scrap treatment conditions, safety, and the like.

The invention discloses an on-line continuous punching and shearing machine suitable for hollow guide rails. The continuous punching and shearing machine comprises a reciprocating running system, a punching system and a control system. The reciprocating running system comprises a slide rail base, a sliding execution member arranged inside the slide rail base and a slide rail which is disposed on the bottom surface of the slide rail base. The punching system comprises a movable die frame, a die group and a hydraulic execution member, wherein the movable die frame can move on the slide rail base along the slide rail, the die group is used for punching and shearing, and the hydraulic execution member is used for driving the die group to act. The control system comprises a master controller used for controlling the sliding execution member and the hydraulic execution member. The continuous punching and shearing machine has the advantages that field environments are improved, punching and shearing processes are combined, the production efficiency is greatly improved, the occupied area of processes is reduced, costs caused by back-and-forth transportation by workers are reduced, the labor intensity is reduced, a rodless cylinder is used for transmission, the structure is compact, the precision is high, and sizes of guide rails can be well guaranteed during shearing.

The invention discloses a system and a method of removing green peels of walnuts through ethylene gas ripening. Green-peeled walnuts are poured into a box from a feeder and dropped onto a top wire mesh conveying belt in the box, the green-peeled walnuts are slowly conveyed from an entry of the box to an exit of the box, and a gas ethylene generator enters the box during conveying and performs ethylene gas ripening to the green peels of the walnuts; after the green peels are ripened, the walnuts directly fall into a rubbing stripping unit from the tail end of a bottom wire mesh conveying belt, and the green peels and inner hard shells of the walnuts are separated. Gas ethylene is used to ripen the green peels o the walnuts and remove the green peels; removal rate of the green peels is high; breakage rate is low; yield of commercial walnuts is high; efficiency is high; the use of the gas ethylene in ripening the green peels prevents kernels from being contaminated, resulting in food contamination; meanwhile, the processing process is green.

The invention relates to a drafting frame. The drafting frame comprises two underframes, warp beam supports, a drafting bracket, pull ropes, harness wire brackets, reed supporting rods, a warp thread supporting rod, reed supporting plate movable brackets and warp beam limiters, wherein a warp beam limiter is arranged at the rear end of each underframe of the drafting frame, and each warp beam support is arranged behind the warp beam limiter; warp threads are arranged in each warp beam support; the drafting bracket is arranged on the underframes; the brackets are arranged on the top of the drafting bracket, and a reed supporting plate is placed in the brackets; rear supporting rods are arranged on the rear side of the middle upper part of the drafting bracket, hooks are arranged on the rear supporting rods, and the pull ropes are arranged on the hooks of the rear supporting rods to lift up the warp thread supporting rod; the drafting bracket is supported by the supporting rods, and two harness wire brackets are sleeved on each supporting rod; and one reed supporting plate movable bracket is arranged between an upper harness wire bracket and a lower harness wire bracket on each supporting rod on the outer side of the drafting bracket. By designing the structure, compared with another drafting frame with the same type, the drafting frame is easier to operate, and is wider in application.

The invention provides an environment-friendly alcohol group ceramic casting coating. The environment-friendly alcohol group ceramic casting coating comprises, by weight, 250-350 parts of high-alumina powder, 50-150 parts of silica powder, 150-200 parts of pyrophillite powder, 30-50 parts of cosolvent, 20-30 parts of suspending agents, 8-15 parts of binding agents, 1-3 parts of surfactant and 250-350 parts of solvent. The environment-friendly alcohol group ceramic casting coating overcomes the defects in the prior art and is high in refractoriness, good in sintering stripping effect, low in price and excellent in comprehensive performance.

The invention discloses a trimethyl phosphite continuous reduced-pressure rectifying technology. A first-level water cooling condenser and a second-level salt water condenser are arranged at the top of a rectifying tower; a gas phase temperature at the top of a control tower is lower than 0 DEG C; after two levels of condensation, the gas phase is demisted by a demister and finally enters a vacuumpump; pressures in the control tower and the rectifying tower are negative pressures. After being condensed by the first-level condenser and the second-level condenser, liquid enters a rectifying reflux tank; the liquid after third-level condensation enters a receiving tank. The technology disclosed by the invention remarkably reduces loss of trimethyl phosphite, has high yield, lowers abrasion of the vacuum pump and realizes high recovery rate of tail gas.

The invention discloses a RH vacuum chamber baking system which comprises a vacuum chamber baking device and a vacuum chamber, wherein the vacuum chamber baking device is provided with a baking cover; the baking cover is matched with the upper part of the vacuum chamber; a vacuum chamber insert tube is connected with a waste gas box; the waste gas box is provided with an exhaust port; the exhaust port of the waste heat box is connected with an air mixer through a control valve; and the air mixer is connected with a waste gas duct. By arranging the baking cover and control valve, in the vacuum chamber drying process, the opening of the control valve is reduced, the retention time of baking hot gas in the vacuum chamber is prolonged, the loss of heat is avoided maximally, and the heating of the baking waste gas on the lower part of the vacuum chamber can be effectively controlled, thereby promoting the temperature uniformity of the refractory material in the vacuum chamber; and in the vacuum chamber baking process, the control valve can be adjusted to control the flow rate of the waste gas by utilizing the draft formed by the chimney effect of the waste gas duct, thereby ensuring the baking speed and baking quality of the vacuum chamber.

The invention discloses a method for treating high-iron and multi-metal zinc concentrate. The method comprises the following steps of: boiling and roasting zinc concentrate containing 14-20 percent of Fe, 0.03-0.10 percent of In, 0.2-0.6 percent of Cu, 0.2-0.6 percent of Cd, 0.005-0.02 percent of Ag. 0.1-0.2 percent of Sn and 40-50 percent of Zn to produce flue gas and a roasted product; preparing sulfuric acid by using the flue gas; blending the roasted product in a reducing agent to be reduced and smelted to produce a crude zinc alloy, crude silver-containing copper and furnace cinder; blowing the furnace cinder to obtain soot and blown furnace cinder, returning the soot to be reduced and smelted, and selling the blown furnace cinder; extracting copper and silver from crude silver-containing copper; enabling the crude zinc alloy to enter a conventional distillation tower for performing four stages of distillation to produce a pyrogenic process distilled zinc product, a crude cadmium product and a high-indium, tin and zinc alloy; extracting indium and tin from the high-indium, tin and zinc alloy. The method is reasonable in process, good in comprehensive recovery, high in production efficiency, low in product cost, and clean and environment-friendly in production process.

The invention discloses a method for processing zinc concentrate with high content of indium and iron. The method comprises steps of carrying out oxygen-enriched oxidizing smelting on the zinc concentrate so as to generate oxidized smoke and fused slag, preparing sulfuric acid through the oxidized smoke; allowing the fused slag to enter a reducing smelting furnace with a lead rain condenser for strong reduction smelting so as to generate crude zinc alloy, pig iron and slag; allowing the crude zinc alloy to enter a lead tower for distilling so as to generate a zinc-cadmium alloy and a zinc-indium base solution; allowing the zinc-cadmium alloy to enter a cadmium tower for secondary distilling so as to produce pyrogenic process distilled zinc and high cadmium-zinc alloy; casting and cooling down the pyrogenic process distilled zinc so as to obtain a zinc ingot product, distilling the high cadmium-zinc alloy in a low temperature tower so as to obtain crude cadmium and a low cadmium-zinc alloy, returning the low cadmium-zinc alloy back to the cadmium tower for distilling; distilling the zinc-indium base solution in a high temperature tower so as to generate a high indium alloy and high temperature crude zinc, returning the high temperature crude zinc back to the lead tower for distilling, and extracting indium from the high indium alloy through steps of 'crushing-leaching-extracting-replacing-electrolyzing'. The method has short technological processes and high production efficiency, has clean and environment-friendly production process, and does not discharge three wastes.

The invention discloses a crushing and screening device for materials. The crushing and screening device is characterized by comprising a charge device, a crushing device and a screening device, wherein the charge device is communicated with a shell; the crushing device is arranged in the shell, and provided with a filter screen at the periphery; and the screening device is located below the crushing device. Preferably, the materials are alloy sheets; the charge device comprises a charge nozzle and a loop from the filter screen to the charge nozzle; an inert gas inlet is arranged in the top of the charge nozzle and the bottom of a stainless steel elbow pipe respectively; the crushing device is provided with a drive motor; the screening device is provided with a vibration motor; the drive motor is a special frequency conversion motor; and the special frequency conversion motor is controlled by a frequency converter. The crushing and screening device disclosed by the invention is simple in structure, simple and convenient to operate overall, stable and reliable in running, low in noise, less in raising dust, good in field environment, and capable of effectively preventing frictional sparking generated by ultrafine powder grains with a pipe wall during a high-speed rotation process, thus safety performance is greatly improved.