WO2002004097A1 - Adsorbant utilise pour le traitement des gaz de combustion contenant du dioxyde de soufre, son procede d'obtention et ses applications - Google Patents

Adsorbant utilise pour le traitement des gaz de combustion contenant du dioxyde de soufre, son procede d'obtention et ses applications Download PDF

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Publication number
WO2002004097A1
WO2002004097A1 PCT/CN2001/000921 CN0100921W WO0204097A1 WO 2002004097 A1 WO2002004097 A1 WO 2002004097A1 CN 0100921 W CN0100921 W CN 0100921W WO 0204097 A1 WO0204097 A1 WO 0204097A1
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WO
WIPO (PCT)
Prior art keywords
flue gas
sulfur dioxide
slag
slurry
tank
Prior art date
Application number
PCT/CN2001/000921
Other languages
English (en)
Chinese (zh)
Inventor
Hanxiang Shi
Original Assignee
Hanxiang Shi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN00119453A external-priority patent/CN1122559C/zh
Priority claimed from CN 00125371 external-priority patent/CN1121360C/zh
Application filed by Hanxiang Shi filed Critical Hanxiang Shi
Priority to AU2001272315A priority Critical patent/AU2001272315A1/en
Publication of WO2002004097A1 publication Critical patent/WO2002004097A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D9/00—Other inorganic fertilisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/73—After-treatment of removed components

Definitions

  • Adsorbent for sulfur dioxide-containing flue gas treatment method, and application thereof
  • the invention relates to a chemical adsorbent used in a sulfur dioxide-containing flue gas treatment method, using the adsorbent to treat sulfur dioxide-containing flue gas, and a method for further manufacturing an inorganic compound fertilizer by using a product obtained by the treatment method.
  • Rice is an effective plant nutrient, which is not only easily absorbed by plants, but also improves the structure of the land to increase the yield of crops. At the same time, it also provides a comprehensive utilization of metallurgical solid waste and a deep processing approach.
  • the Chinese patent "silicon compound fertilizer and its preparation method" with the patent number 96112383.4 reacts metal blast furnace slag or molten vitreous fertilizer with sulfuric acid to produce soluble silicic acid and silica gel, calcium salt, magnesium salt, aluminum salt, and then According to the needs of crops, it is mixed with agricultural fertilizer. They both provide examples of chemical treatment of slag into fertilizers.
  • the disadvantages are that special sulfuric acid or waste acid must be provided, and the environmental problems of sulfur dioxide-containing flue gas emissions from metal smelting enterprises cannot be well combined. Use.
  • the main object of the present invention is to provide a chemical adsorbent which uses slag discharged from an industrial refinery (power plant) as a raw material and has a simple process method for treating sulfur dioxide-containing exhaust gas.
  • Another object of the present invention is to provide a sulfur dioxide-containing flue gas treatment method with a simple process method by using the aforementioned chemical adsorbent.
  • the present invention provides a chemical adsorbent for treating sulfur dioxide-containing exhaust gas, which is characterized by mixing powdery slag and water in a weight ratio of 1: 2-20.
  • the particle size of the slag powder is 100-250 mesh.
  • the slag is a waste slag discharged from a non-ferrous metal smelter, a power plant, a ferrous metal smelter or an oil refinery.
  • the present invention provides a sulfur dioxide-containing flue gas treatment method, which is characterized by using the above-mentioned chemical adsorbent and performing the following steps:
  • a chemical adsorbent slurry is prepared in a slurry mixing tank
  • the absorption tower is a two-stage serial spray tower.
  • the reaction temperature of the absorption tower is 40-120 ° C.
  • the invention provides a method for manufacturing an inorganic compound fertilizer, which is characterized by using the reactants obtained by the sulfur dioxide-containing flue gas treatment method, and after step 3, the following steps are followed:
  • FIG. 1 is a process flow diagram of the adsorbent treatment of exhaust gas according to the present invention.
  • FIG. 2 is a process flow diagram of manufacturing a compound fertilizer from the processed product. Best practice
  • the sulfur dioxide flue gas treatment method first uses a ball mill to grind the discarded slag of a non-ferrous metal smelter into a powder of 100-250 mesh size, and then adds 2-20 times water in a slurry mixing tank to prepare a slurry.
  • Chemical adsorbent using slurry pump to drive the slurry into the absorption (spray) tower to contact the sulfur dioxide in the flue gas in the tower for contact reaction, the reaction temperature is controlled in the range of 40-120 ° C, and some products under the tower overflow during the reaction Go to the circulation tank for recycling.
  • the secondary tandem absorption (spraying) tower send a part of the reaction to the sedimentation separation tank.
  • the sedimentation clarification is carried out in the sedimentation separation tank, and the supernatant is sent to the slurry mixing tank. Internal for recycling, the precipitate is treated as a reactant.
  • the chemical absorption near-range reactions mainly include:
  • a part of the reaction is sent to a precipitation separation tank, and industrial gypsum is added to the precipitation separation tank.
  • the weight ratio of gypsum to slag is 0.005—0.1: 1.
  • the clarified liquid is returned to the slurry mixing tank for recycling, and the precipitate is separated and sent to a rotary dryer to directly produce powdery fertilizer or granular fertilizer.
  • the dehydrated product can also be added with sodium silicate additives to pelletize on a disc pelletizer, resulting in a pellet shape with a diameter of 3-5 mm, and dried to make a finished product.
  • Its chemical adsorption process mainly includes:
  • Example 1 The process described in Figures 1 and 2 is used, in which ferrous metal smelters are used to discard the waste slag and grind it to an average mesh size of 250 mesh powder, and then add water to prepare a slurry containing 20% by weight of slag. : 1. Perform the above reaction to obtain a granular fertilizer A with a diameter of 3-5 mm.
  • Example 2 The process described in Figs. 1 and 2 is used, in which a slag from a power plant is used to grind powder with an average size of 120 meshes, and water is added to prepare a slurry containing 30% by weight basis weight basis. : 1, Perform the above reaction. A granular fertilizer B was obtained.
  • Example 3 The process described in Figures 1 and 2 is used, in which a slag from a power plant is used to grind powder with an average size of 180 meshes, and water is added to prepare a slurry containing 10% by weight basis weight of slag.
  • the weight ratio of gypsum to slag is 0.01 : 1, carry out the above reaction.
  • a granular fertilizer C with a diameter of 3-5 mm was obtained. It can be seen from the above embodiments that the use of the present invention is effective in production. Firstly, the SO 2 flue gas emission is stably and effectively controlled. Secondly, it makes up for the lack of turbulent ball lime milk spray tower purification of 80 2 flue gas technology. Thirdly, it improves equipment utilization and labor productivity, with less investment, low cost, and good efficiency. Table 1
  • the invention uses the product slag after the absorption of 50 2 as the main raw material to produce a new type of inorganic compound fertilizer (such as fertilizers A, B, and C), which is practical and simple.
  • a new type of inorganic compound fertilizer such as fertilizers A, B, and C
  • the process is simple and the equipment investment is small.
  • Compound fertilizer
  • this inorganic compound fertilizer is its aqueous solution pH of 5-6, water content of about 5-8%, color is yellow or light yellow, powder or granules, and its composition contains total Si of 20.4%, and the effective component is 7.7%; total iron content is 19.29%, effective content is 4.5%; total magnesium content is 1.45%, effective content is 0.7%; total calcium content is 13.67%, effective content is 4.3%; total sulfur content is 9.1%, effective
  • the composition is 5.5%; the other ingredients contain 0.159% zinc, 0.00025% lead, 0.0001% cadmium, 0.13% copper, 0.12% chromium, and are free of arsenic, mercury, and nickel.
  • This fertilizer has been used in field trials with good results. The statistical results are listed in Table 2. Table 2
  • the inorganic compound fertilizer of the present invention made with the product slag as the main raw material has obvious effects on many plants. Its fertilizer can not only increase the yield, but also the fruit is stout and rich in content. And it has a wide range of application and low cost. From its composition, especially high content of sulfur, iron, and silicon, it is sensitive to the characteristics of cruciferae, leguminous crops, onions, garlic, leek, sorghum, and rice. Therefore, long-term application will not only ensure the increase of agricultural production and income, but also achieve the purpose of improving the soil.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Fertilizers (AREA)

Abstract

L'invention concerne un procédé de traitement des gaz de combustion renfermant du dioxyde de soufre faisant appel à un adsorbant chimique et un procédé d'obtention d'un fertilisant inorganique complexe consistant à réduire les scories en poudre, à les mélanger avec de l'eau selon un rapport de 1 :2-20 afin d'obtenir une suspension aqueuse qui est mise en réaction, par la suite, avec le dioxyde de soufre contenu dans les gaz de combustion, à ajouter dans le produit réactionnel du gypse qui fera office de produit de référence selon un rapport de 1 :0,005-0,1, à mélanger tous les ingrédients, à précipiter le mélange et finalement à déshydrater le mélange afin d'obtenir un fertilisant inorganique complexe. Les procédés mis en oeuvre dans cette invention sont simples, l'investissement en infrastructure est peu important, les résidus sont réutilisés et le recyclage des résidus constitue le but ultime de cette invention. Ces procédés trouvent une application dans les usines métallurgiques ainsi que dans les centrales électriques émettant des gaz de combustion SO2.
PCT/CN2001/000921 2000-07-11 2001-06-07 Adsorbant utilise pour le traitement des gaz de combustion contenant du dioxyde de soufre, son procede d'obtention et ses applications WO2002004097A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001272315A AU2001272315A1 (en) 2000-07-11 2001-06-07 Absorbent and process for treatment of flue gas containing sulphur dioxide

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN00119453.4 2000-07-11
CN00119453A CN1122559C (zh) 2000-07-11 2000-07-11 含二氧化硫烟气处理方法
CN00125371.9 2000-09-21
CN 00125371 CN1121360C (zh) 2000-09-21 2000-09-21 用吸so2后产物渣制造无机复合肥的生产方法

Publications (1)

Publication Number Publication Date
WO2002004097A1 true WO2002004097A1 (fr) 2002-01-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2001/000921 WO2002004097A1 (fr) 2000-07-11 2001-06-07 Adsorbant utilise pour le traitement des gaz de combustion contenant du dioxyde de soufre, son procede d'obtention et ses applications

Country Status (2)

Country Link
AU (1) AU2001272315A1 (fr)
WO (1) WO2002004097A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5360880A (en) * 1976-11-12 1978-05-31 Nippon Steel Corp Wet desulfurizing method for exhaust gas by use of slag
JPS61170525A (ja) * 1985-01-22 1986-08-01 Kanji Murakami ダスト及び溶滓の同時処理方法
CN1061914A (zh) * 1990-11-29 1992-06-17 湖南大学 一种燃煤锅炉烟气除尘脱硫工艺

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5360880A (en) * 1976-11-12 1978-05-31 Nippon Steel Corp Wet desulfurizing method for exhaust gas by use of slag
JPS61170525A (ja) * 1985-01-22 1986-08-01 Kanji Murakami ダスト及び溶滓の同時処理方法
CN1061914A (zh) * 1990-11-29 1992-06-17 湖南大学 一种燃煤锅炉烟气除尘脱硫工艺

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Publication number Publication date
AU2001272315A1 (en) 2002-01-21

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