CN110724001A - Post-treatment method of GFX dry desulfurization and denitrification adsorption block - Google Patents
Post-treatment method of GFX dry desulfurization and denitrification adsorption block Download PDFInfo
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- CN110724001A CN110724001A CN201810694288.5A CN201810694288A CN110724001A CN 110724001 A CN110724001 A CN 110724001A CN 201810694288 A CN201810694288 A CN 201810694288A CN 110724001 A CN110724001 A CN 110724001A
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- adsorption block
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- dry desulfurization
- sulfate solution
- denitrification
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
- C01F5/12—Magnesia by thermal decomposition of magnesium compounds by thermal decomposition of magnesium sulfate, with or without reduction
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
Abstract
The invention belongs to the field of waste treatment, and relates to a post-treatment method of a GFX dry desulfurization and denitrification adsorption block. The method can carry out environment-friendly treatment on the used adsorption block, and comprises the following steps: placing the adsorption block used in the GFX dry desulfurization and denitrification in an acid-resistant reaction container, adding clear water, stirring, adding a proper amount of sulfate solution, controlling the temperature to be 20-40 ℃, stirring for 20-30 minutes, and completely dissolving or partially dissolving the adsorption block to obtain the sulfate solution of the adsorption block; step 2, adding amino acid liquor [ C ] into the sulfate solution4H4NO3Na]xUrea, secondary elements, trace elements, a complexing agent and a wetting penetrant, controlling the reaction temperature to be 70-95 ℃ and the reaction time to be 20-31 minutes, and preparing the agricultural fertilizer by filtering and purifying, wherein the agricultural fertilizer is suitable for industrial production and has a good application prospect.
Description
Technical Field
The invention belongs to the field of waste treatment, and relates to a post-treatment method of a GFX dry desulfurization and denitrification adsorption block.
Background
The national requirements for flue gas treatment are higher and higher, the dry desulfurization and denitration method has gradually replaced the wet desulfurization and denitration market, the GFX dry desulfurization and denitration integrated technology is the first-push mainstream technology of the dry market, see patents 201610891343.0 and 201710218412.6, although the technical effect is good, the post-treatment of the used adsorption block is a difficult problem to be overcome.
The adsorption block used in the GFX dry desulfurization and denitrification process is complex in component and tedious in treatment, the existing treatment method is landfill, but the landfill is not subjected to harmless treatment, and a large amount of chemical substances are remained; the method not only does not realize the resource treatment of the garbage, but also occupies a large amount of land. The competent departments at all levels of the government of China know that the problems of the treatment technology are forbidden and gradually eliminate the behaviors.
Therefore, the development of an environment-friendly post-treatment method for the adsorption block used in the GFX dry desulfurization and denitrification is a problem to be solved at present.
Disclosure of Invention
The invention aims to: aiming at the problems, the method for post-treating the GFX dry desulfurization and denitrification adsorption block can carry out environment-friendly treatment on the used adsorption block, wherein one part of the adsorption block is used for obtaining agricultural fertilizer, humic acid and cement expanding agent, and the other part of the adsorption block is calcined for obtaining magnesium oxide or is made into the adsorption block for reuse, so that the method has a good application prospect.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a post-treatment method of a GFX dry desulfurization and denitrification adsorption block comprises the following steps:
step 1, placing an adsorption block used in GFX dry desulfurization and denitrification in an acid-resistant reaction container, adding clear water, stirring, adding a proper amount of sulfate solution, controlling the temperature to be 20-40 ℃, stirring for 20-30 minutes, and completely dissolving or partially dissolving the adsorption block to obtain the sulfate solution of the adsorption block;
step 2, adding amino acid liquor [ C ] into the sulfate solution4H4NO3Na]xUrea, secondary elements, trace elements, a complexing agent and a wetting penetrant, wherein the reaction temperature is controlled to be 70-95 ℃, and the reaction time is 20And (5) filtering and purifying for 31 minutes to prepare the agricultural fertilizer.
The secondary elements are at least one or more compounds containing Ca, Mg, S and Cl, the trace elements are at least two or more compounds containing Zn, Fe, Cu, Mn, Mo, B, Sr and Co, and the addition amount of the secondary elements and the trace elements is 10-35% of the total amount of the sulfate solution of the adsorption block.
The complexing agent is two or more of sodium ethylene diamine tetracetate, tartaric acid, propylene diamine tetraacetic acid, citric acid and heptonic acid, and the addition amount of the complexing agent is 2-10% of the total amount of the sulfate solution of the adsorption block.
The wetting penetrant is any two of a nonionic surfactant, an anionic surfactant and an amphoteric surfactant, and the nonionic surfactant is nonionic polyacrylamide or alkylphenol ethoxylates; the anionic surfactant is anionic polyacrylamide, the amphoteric surfactant is phosphate betaine or carboxylic betaine, and the addition amount of the wetting penetrant is 0.5-2.5% of the total amount of sulfate solution of the adsorption block.
And (3) preparing the undissolved solid adsorption blocks in the step (1) into magnesium oxide by a general smelting and calcining mode, and preparing the solid adsorption blocks into adsorption blocks again for reuse.
Further, according to another treatment method provided by the invention, sodium chloride powder, iron powder and a water reducing agent can be added into the sulfate solution of the adsorption block in the step 1, the mixture is continuously stirred, the reaction temperature is controlled to be 40-60 ℃, and the reaction time is controlled to be 40-60 minutes, so that humic acid is obtained; and (3) adjusting the pH value of the humic acid to 6-7 by using potassium hydroxide or potassium carbonate, continuing to react for 20-30 minutes, adding a wetting penetrating agent, and mixing for 30-60 minutes to prepare the cement expanding agent.
The water reducing agent is an HSB aliphatic high-efficiency water reducing agent or a fatty acid high-efficiency water reducing agent.
The adsorption block used in the GFX dry desulfurization and denitrification technology contains the following components as shown in Table 1.
TABLE 1 adsorption Block composition after use
Compared with the prior art, the invention has the following technical advantages:
1. according to the traditional treatment mode, the adsorption blocks can only be landfilled after being used, and can be treated in a landfilling mode, the adsorption blocks become industrial garbage, and for example, an electrolytic aluminum enterprise in Henan, 180 tons of adsorption blocks are required to be landfilled every year, namely 180 tons of industrial garbage exist every year. The purified solution can be prepared into agricultural fertilizer by the treatment of the technology of the invention, and can be directly used, thereby changing waste into valuable.
2. The adsorption block treated by the technology of the invention can be prepared into an agricultural fertilizer from a purified solution and can also be prepared into a cement expanding agent for use, wherein the cement expanding agent is a chemical additive and is added into cement, and when the cement is coagulated and hardened, the cement expanding agent expands along with the volume of the cement, so that the adsorption block plays roles of compensating shrinkage and stretching a reinforcing steel bar to generate prestress and fully filling a cement gap. The adsorption blocks which are not buried any more are reused again, so that the recycling is realized;
3. the used adsorption block is made into magnesium oxide which can be directly used, thus saving raw material resources and mining cost.
4. The landfill treatment mode of the original adsorption block is actually a pollution mode to the environment, the adsorption block after landfill exists in soil, and bottom mud is often a 'storage warehouse' of the adsorption block. When the environment changes, the metal form in the bottom mud is transformed and released to cause pollution. The metal can not be biodegraded, but has the biological accumulation property, and can directly threaten higher organisms including human beings, and related experts indicate that the metal has irreversible conversion to the pollution of the soil, the polluted soil has no treatment value, and only planting varieties can be adjusted to avoid the pollution. Therefore, the problem of bottom sediment metal pollution is increasingly paid attention by people. The treatment is not carried out in a landfill mode, so that the pollution to the environment is avoided.
Drawings
FIG. 1 is a flow chart of a post-processing method of the present invention.
Detailed Description
Example 1
A post-treatment method of a GFX dry desulfurization and denitrification adsorption block comprises the following steps:
step 1, placing an adsorption block used in GFX dry desulfurization and denitrification in an acid-resistant reaction container, adding clear water, stirring, adding a proper amount of sulfate solution, controlling the temperature to be 20-40 ℃, stirring for 30 minutes, and completely dissolving the adsorption block to obtain the sulfate solution of the adsorption block;
step 2, adding amino acid liquor [ C ] into the sulfate solution4H4NO3Na]x(polyaspartic acid), urea, 30% of secondary elements and trace elements, 6% of sodium ethylene diamine tetracetate, 2% of tartaric acid, 1% of nonionic polyacrylamide and 1% of anionic polyacrylamide, controlling the reaction temperature to be 70-95 ℃, reacting for 20-31 minutes, filtering and purifying to prepare the agricultural fertilizer.
Example 2
Said agricultural fertilizer contains amino acid liquor, medium elements, trace elements, complexing agent and wetting agent, and can obviously inhibit the diseases of plant due to plant diseases, and can promote growth of root system, protein synthesis, and can prevent and resist diseases. The agricultural fertilizer can effectively prevent and treat the root rot of tuber mustard, the verticillium wilt of eggplants, the navel rot of hot peppers, the ginger blast and the rice blast, the Chinese brake tail disease of watermelons, anthracnose and the like; if the preserved szechuan pickle has rotten root, the preserved szechuan pickle can be restored to normal after being sprayed with the product for 5 days; the rain drops for more than 20 days continuously in 10 months in Guangdong, all vegetables and fruits directly sprayed with the vegetable spray in 9 months survive, and most vegetables which are not sprayed die after water returns.
The agricultural fertilizer adopts various complexing agents and wetting penetrants, prevents various nutrient elements from generating orange resistance, increases the synergistic effect among the elements, and has quick absorption and high fertilizer efficiency. If the agricultural fertilizer is sprayed on a lettuce planting test field for a long time, the growth is obvious when compared with a control group in the same field after only 26 hours; the seeding after soaking the bitter melon seeds by the invention is compared with the seed soaking without the invention, and the test result is as follows:
table 2 beneficial effects of the agricultural fertilizer of the present invention
Example 3
The agricultural fertilizer prepared by the invention contains various nutrient elements necessary for the growth of plants, and can meet the requirements of different plants and the same plant on the nutrient elements in different growth periods. It is an organic and inorganic compound fertilizer, can increase yield, preserve quality, and cultivate soil fertility, and is beneficial to the sustainable development of agriculture. If the product is sprayed in the seedling planting period, the transplanting period, the vigorous growing period and the expanding period of the watermelons, the occurrence of the disease of the Chinese lobelia, the anthracnose and the like is effectively prevented, the problem of continuous cropping of the watermelons is solved, the yield is increased by 100-150 jin per mu in the continuous cropping field, the sweetness of the watermelons is increased, the watermelons are stored for a long time, and the fruits cannot be damaged after the watermelons are placed on the indoor ground for 55 days.
Example 4
A post-treatment method of a GFX dry desulfurization and denitrification adsorption block comprises the following steps:
step 1, placing an adsorption block used in GFX dry desulfurization and denitrification in an acid-resistant reaction container, adding clear water, stirring, adding a proper amount of sulfate solution, controlling the temperature to be 20-40 ℃, stirring for 20 minutes, and completely dissolving the adsorption block to obtain the sulfate solution of the adsorption block;
step 2, adding amino acid liquor [ C ] into the sulfate solution4H4NO3Na]xThe fertilizer is prepared from (polyaspartic acid), urea, 10% of secondary elements and trace elements in total, 2% of tartaric acid and 0.5% of alkylphenol polyoxyethylene, the reaction temperature is controlled to be 70-95 ℃, the reaction time is 20 minutes, and the agricultural fertilizer is prepared by filtering and purifying.
Example 5
A post-treatment method of a GFX dry desulfurization and denitrification adsorption block comprises the following steps:
step 1, placing an adsorption block used in GFX dry desulfurization and denitrification in an acid-resistant reaction container, adding clear water, stirring, adding a proper amount of sulfate solution, controlling the temperature to be 20-40 ℃, stirring for 30 minutes, and completely dissolving the adsorption block to obtain the sulfate solution of the adsorption block;
step 2, adding amino acid liquor [ C ] into the sulfate solution4H4NO3Na]x(polyaspartic acid), urea, medium elements and trace elements accounting for 35% of the total amount, propylene diamine tetraacetic acid accounting for 5%, citric acid accounting for 5%, alkylphenol ethoxylates accounting for 1% and phosphate betaine accounting for 0.5%, controlling the reaction temperature to be 70-95 ℃ and the reaction time to be 31 minutes, and filtering and purifying to prepare the agricultural fertilizer.
Example 6
Placing the adsorption block used in the GFX dry desulfurization and denitrification into an acid-resistant reaction container, adding clear water, stirring, adding a proper amount of sulfate solution, controlling the temperature to be 20-40 ℃, stirring for 30 minutes to partially dissolve the adsorption block, preparing the undissolved solid adsorption block into magnesium oxide through a general smelting and calcining mode, and preparing the magnesium oxide into the adsorption block again for reuse.
Example 7
Adding sodium chloride powder, iron powder and an HSB aliphatic superplasticizer into a sulfate solution of an adsorption block obtained in the step 1 of the embodiment 1, continuously stirring, controlling the reaction temperature to be 40-60 ℃, and reacting for 50 minutes to obtain humic acid; and (3) adjusting the pH value of the humic acid to 6-7 by using potassium hydroxide or potassium carbonate, continuing to react for 25 minutes, adding the wetting penetrating agent, and mixing for 45 minutes to prepare the cement expanding agent.
Claims (8)
1. A post-treatment method of a GFX dry desulfurization and denitrification adsorption block is characterized by comprising the following steps:
step 1, placing an adsorption block used in GFX dry desulfurization and denitrification in an acid-resistant reaction container, adding clear water, stirring, adding a proper amount of sulfate solution, controlling the temperature to be 20-40 ℃, stirring for 20-30 minutes, and completely dissolving or partially dissolving the adsorption block to obtain the sulfate solution of the adsorption block;
step 2, adding amino acid liquor [ C ] into the sulfate solution4H4NO3Na]xUrea, middle quantumThe preparation method comprises the following steps of preparing the agricultural fertilizer by using elements, trace elements, a complexing agent and a wetting penetrating agent, controlling the reaction temperature to be 70-95 ℃ and the reaction time to be 20-31 minutes, and filtering and purifying.
2. The method as claimed in claim 1, wherein the medium element is at least one or more compounds selected from Ca, Mg, S and Cl, the trace element is at least two or more compounds selected from Zn, Fe, Cu, Mn, Mo, B, Sr and Co, and the amounts of the medium element and the trace element are 10-35% of the total amount of sulfate solution in the adsorption mass.
3. The post-treatment method of the GFX dry desulfurization and denitrification adsorption block according to claim 1, wherein the complexing agent is two or more of sodium ethylene diamine tetracetate, tartaric acid, propylene diamine tetraacetic acid, citric acid and heptonic acid, and the addition amount of the complexing agent is 2-10% of the total amount of sulfate solution of the adsorption block.
4. The method for post-treating the GFX dry desulfurization and denitrification adsorption block according to claim 1, wherein the wetting penetrant is any two of a nonionic surfactant, an anionic surfactant and an amphoteric surfactant, and the addition amount of the wetting penetrant is 0.5-2.5% of the total sulfate solution amount of the adsorption block.
5. The post-treatment method of the GFX dry desulfurization and denitrification adsorption block according to claim 1, wherein the nonionic surfactant is nonionic polyacrylamide or alkylphenol ethoxylate; the anionic surfactant is anionic polyacrylamide, and the amphoteric surfactant is phosphate betaine or carboxylic betaine.
6. The method for post-treating GFX dry desulfurization and denitration adsorption blocks according to claim 1, wherein the undissolved solid adsorption blocks in step 1 are made into magnesium oxide by a common smelting and calcining method, and can be made into adsorption blocks again for reuse.
7. The post-treatment method of the GFX dry desulfurization and denitrification adsorption block according to claim 1, wherein sodium chloride powder, iron powder and a water reducing agent are added into the sulfate solution of the adsorption block in the step 1, and the mixture is continuously stirred, the reaction temperature is controlled to be 40-60 ℃, and the reaction time is controlled to be 40-60 minutes, so that humic acid is obtained; and (3) adjusting the pH value of the humic acid to 6-7 by using potassium hydroxide or potassium carbonate, continuing to react for 20-30 minutes, adding a wetting penetrating agent, and mixing for 30-60 minutes to prepare the cement expanding agent.
8. The post-treatment method of the GFX dry desulfurization and denitrification adsorption block according to claim 1, wherein the water reducer is an HSB aliphatic high-efficiency water reducer or a fatty acid high-efficiency water reducer.
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| CN103349900A (en) * | 2013-07-22 | 2013-10-16 | 云南亚太环境工程设计研究有限公司 | Method for desulfurating and denitrating simultaneously |
| CN105038823A (en) * | 2015-07-23 | 2015-11-11 | 同济大学 | Gradient utilization method of animals dies of diseases |
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2018
- 2018-06-29 CN CN201810694288.5A patent/CN110724001A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326912A (en) * | 2000-06-02 | 2001-12-19 | 赵善茂 | Complex utilization method for coal burning boiler smoke and ash slag |
| CN1687637A (en) * | 2005-05-30 | 2005-10-26 | 史汉祥 | Technique of non-pollutant discharge for comprehensive treating coal-burning boiler |
| CN101185843A (en) * | 2007-08-30 | 2008-05-28 | 上海交通大学 | Method for producing compound fertilizer by using humates simultaneously desulfurizing and denitrating |
| CN101732974A (en) * | 2010-02-25 | 2010-06-16 | 温州大学 | Method and system for simultaneously treating source-separated urine and smoke |
| CN103349900A (en) * | 2013-07-22 | 2013-10-16 | 云南亚太环境工程设计研究有限公司 | Method for desulfurating and denitrating simultaneously |
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Application publication date: 20200124 |