33results about How to "Eliminate or reduce pollution" patented technology

The invention belongs to the technical field of soil remediation, and provides a contaminated soil-based soil conditioner which comprises the following components in parts by weight: 50-100 parts of plant ash, 50-100 parts of quick lime, 30-80 parts of an organic fertilizer, 40-70 parts of a calcium magnesium phosphate fertilizer, 20-60 parts of zeolite, 5-10 parts of a compound microbial agent, 0.5-1 part of biomass charcoal and 1-2 parts of urea. The contaminated soil-based soil conditioner integrates plant ash, quick lime, organic fertilizer, calcium magnesium phosphate, zeolite fertilizer,composite microbial agent, biomass charcoal and urea, not only is simple in material obtaining and low in cost, but also is good in remediation effect on heavy metal contaminated soil and quick in effect taking, and meanwhile, the soil fertility is improved.

The invention relates to peanut fertilizer which is composed of the following components in parts by weight: 450-550 parts of urea, 100-120 parts of diammonium phosphate, 70-100 parts of potassium sulfate, 50-60 parts of ferrous sulfate, 60-72 parts of zinc sulfate, 60-70 parts of humic acid, 80-92 parts of nitro humate, 10-12 parts of EDTA-Zn, 10-12 parts of EDTA-Fe and 10-12 parts of EDTA-B. Compared with the prior art, the peanut fertilizer disclosed by the invention is reasonable in nutrient proportion according to a nutrient demand of peanut, and can improve a fertilizer utilization rate, improve soil structure and reduce agricultural cost.

The invention discloses an ultraviolet absorption measurement method for waste gas sulfur dioxide of a stationary pollution source. According to the method, an ultraviolet absorption method sulfur dioxide analyzer or multiple groups of gas analyzers with an ultraviolet absorption method sulfur dioxide analysis function is/are used as multiple monitors; sulfur dioxide is used for absorbing light with the characteristic wavelength of 240-330nm in a near ultraviolet light region, and the concentration of sulfur dioxide in waste gas is quantified according to the lambert-beer law; then the sulfur dioxide discharging rate is obtained by further calculation. An ultraviolet absorption method can adapt to wider measurement on SO2 discharged by the stationary source; by the method, the requirements on supervising monitoring on an on-site pollution source, comparison monitoring on a CEMS (continuous emission monitoring system) and checking of data effectiveness are met.

The invention discloses a waste residue-free preparation method of O,O-dialkyl thiophosphoryl chloride, which is characterized by comprising the following steps: by taking dialkyl chlorophosphite as an intermediate, performing chlorination with O,O-dialkyl phosphorodithioate under the effect of strong Lewis acid metal chloride to prepare O,O-dialkyl thiophosphoryl chloride with the structural general formula shown in the specification, wherein the chemical equation is shown in the specification. The method for preparing high-content O,O-dialkyl thiophosphoryl chloride, disclosed by the invention, has the advantages of simple process route, mild reaction conditions, simple after-treatment and low production cost, and is convenient for industrial transformation; and the method avoids or reduces pollution, strictly controls the process, saves after-treatment and prevents the generation of viscose waste sulfur residues.

The invention relates to a thermoplastic-resin-sand-to-core waste gas purification method using materials capable of performing online regeneration and adsorption. The method comprises: 1, collecting waste gas; 2, spraying powder into the waste gas; 3, mixing the captured waste gas into the powder material through the system, conveying into a waste gas filter through a hard wind pipe, and removing oil stains and dust from the waste gas; and 4, performing adsorption/online regeneration alternating cycle operation. According to the present invention, the organic waste gas, the oily substances, the dust and the like generated during the operation of the core production machine in the core production workshop are effectively captured; and during the waste gas capturing process, the waste gas is subjected to powder spraying and filtration, the organic matters in the waste gas are adsorbed with the adsorbent, and the adsorption device is regularly and onlinely regenerated, such that the operation reliability and the operation stability of the waste gas purification treatment system are effectively ensured, and the occupational hazards and the environmental pollution caused by the dust in the production process of the core production machine in the thermoplastic-resin-sand-to-core production workshop are eliminated or reduced.

The invention discloses a recovery method for acid mist generated by an acid hydrolysis reaction in citric acid production. The recovery method comprises an acid hydrolysis reactor in the existing production process and acid hydrolysis reaction in the reactor, and further comprises the steps of (1) collecting liquid supernatant after lime milk is clarified as circulating fluid of a spray tower; (2) pumping the circulating fluid into the spray tower, and circularly spraying in the spray tower; (3) introducing the acid mist of the citric acid generated in the acid hydrolysis reaction into the spray tower, and receiving the spray and absorption of the circulating fluid; (4) spraying the circulating fluid to the end, then entering into a filter tank for washing and filtering, and obtaining calcium citrate; (5), putting the obtained calcium citrate back to the acid hydrolysis reactor, and performing acid hydrolysis reaction again. According to the recovery method disclosed by the invention, the pollution of the acid mist of the citric acid to atmospheric environment can be removed or reduced; meanwhile, 90 percent or over 90 percent of lapsed citric acid of semi-finished product in the acid mist can be recovered and reused, and the product yield is improved by about 1 percent.

The invention provides a method for absorbing hot galvanizing acid mist and co-producing calcium chloride, and belongs to the technical field of comprehensive utilization of resources. The method comprises the following steps that calcium-based circulating alkali liquor is mixed with hot galvanizing acid mist in a spraying mode, and spraying absorption is conducted to obtain a calcium chloride solution; and evaporation concentration, filter pressing and cooling crystallization are sequentially carried out on the calcium chloride solution to obtain calcium chloride. According to the method, while the hot galvanizing acid mist is absorbed, the obtained absorption liquid (calcium chloride solution) is prepared into a calcium chloride product, so that the pollution of the hot galvanizing acidmist to the environment can be eliminated or reduced, the calcium chloride can be co-produced, the process is simple, the energy consumption is low, the cost is low, and the comprehensive utilizationof resources can be realized. According to the method, the acid mist absorption rate is high (can reach 96.1%), and the purity of the obtained calcium chloride product is high (can reach 98.5%).

The invention discloses modified phenolic resin for an environment-friendly thermosetting cooling water curtain. The modified phenolic resin comprises the following raw materials: natural plant phenol, formaldehyde, triethylamine, urea and a modifier, wherein 25-30 parts by weight of natural plant phenol, 40-50 parts by weight of formaldehyde, 0.8-0.9 part by weight of triethylamine and 10-15 parts by weight of urea are added; according to the invention, the defects of white latex and urea resin after curing are fully overcome. The resin is thermosetting resin, and does not react with water, air, ultraviolet rays, strong acid and strong base after being cured. The cured resin has the characteristics of stable performance, high strength, strong bonding force, strong weather resistance and the like. The defects that the cooling water curtain honeycomb paper produced from the white latex and the urea-formaldehyde resin is poor in weather resistance, low in water absorption and low in adhesive strength are fully overcome.