CN114405551B - Method for preparing sol-gel type coal-fired catalyst by using electroplating sludge - Google Patents

Method for preparing sol-gel type coal-fired catalyst by using electroplating sludge Download PDF

Info

Publication number
CN114405551B
CN114405551B CN202210139335.6A CN202210139335A CN114405551B CN 114405551 B CN114405551 B CN 114405551B CN 202210139335 A CN202210139335 A CN 202210139335A CN 114405551 B CN114405551 B CN 114405551B
Authority
CN
China
Prior art keywords
coal
catalyst
sol
electroplating sludge
solution
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN202210139335.6A
Other languages
Chinese (zh)
Other versions
CN114405551A (en
Inventor
冯春全
周晨燕
刘芬亮
吴明辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Newborn Foshan Technology Co ltd
Original Assignee
Newborn Foshan Technology Co ltd
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
Application filed by Newborn Foshan Technology Co ltd filed Critical Newborn Foshan Technology Co ltd
Priority to CN202210139335.6A priority Critical patent/CN114405551B/en
Publication of CN114405551A publication Critical patent/CN114405551A/en
Application granted granted Critical
Publication of CN114405551B publication Critical patent/CN114405551B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/22—Organic complexes
    • B01J31/2204—Organic complexes the ligands containing oxygen or sulfur as complexing atoms
    • B01J31/2208—Oxygen, e.g. acetylacetonates
    • B01J31/2226—Anionic ligands, i.e. the overall ligand carries at least one formal negative charge
    • B01J31/223—At least two oxygen atoms present in one at least bidentate or bridging ligand
    • B01J31/2239—Bridging ligands, e.g. OAc in Cr2(OAc)4, Pt4(OAc)8 or dicarboxylate ligands
    • B01J35/23—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/03—Precipitation; Co-precipitation
    • B01J37/036—Precipitation; Co-precipitation to form a gel or a cogel
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L10/00—Use of additives to fuels or fires for particular purposes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/10—Treating solid fuels to improve their combustion by using additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/10—Complexes comprising metals of Group I (IA or IB) as the central metal
    • B01J2531/16—Copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/80—Complexes comprising metals of Group VIII as the central metal
    • B01J2531/84—Metals of the iron group
    • B01J2531/842—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/80—Complexes comprising metals of Group VIII as the central metal
    • B01J2531/84—Metals of the iron group
    • B01J2531/847—Nickel
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
    • C10L2230/04—Catalyst added to fuel stream to improve a reaction

Abstract

The invention belongs to the technical field of solid waste treatment and coal catalyst preparation, and discloses a method for preparing a sol-gel type coal catalyst by using electroplating sludge. The preparation method comprises the following steps: drying, grinding and sieving the electroplating sludge, and then adding inorganic acid for acid leaching treatment to obtain electroplating sludge pickle liquor; then diluting the obtained electroplating sludge pickle liquor with water, adding alkali solution for pH adjustment to obtain initial solution of the coal-fired catalyst; adding complexing agent into the initial solution of the coal-fired catalyst, fully and uniformly mixing, evaporating and concentrating until the solution is colloidal, and obtaining the Sol-Gel type coal-fired catalyst. The invention utilizes industrial waste to prepare the catalyst, reduces the production cost, and the prepared catalyst is a uniform sol-gel type product, reduces the transportation cost compared with the traditional solution type catalyst, avoids the problem of effective component precipitation failure, can reduce the combustion temperature of coal dust, reduces the emission of pollutants, and realizes certain environmental protection benefit.

Description

Method for preparing sol-gel type coal-fired catalyst by using electroplating sludge
Technical Field
The invention belongs to the technical field of solid waste treatment and coal catalyst preparation, and particularly relates to a method for preparing a sol-gel type coal catalyst by using electroplating sludge.
Background
Coal is a main energy source and an important chemical raw material in China, and is a non-renewable resource. Along with the rapid development of industrial manufacturing in China, china becomes a large country for coal consumption, and a great deal of coal is used, so that on one hand, the energy source is increasingly exhausted; on the other hand, since a large amount of polluted gas is discharged by the combustion of coal, the atmospheric environment is destroyed. Therefore, how to efficiently utilize resources and reduce environmental pollution in the coal combustion process has extremely important research significance.
In order to achieve the efficient utilization of coal, adding a coal-fired catalyst is the most effective measure except for optimizing and iterating coal-fired equipment and process. The coal-fired catalyst can change the combustion characteristics of coal dust, and can also desulfurize and denitrify so as to achieve the effect of reducing pollutant emissions.
The active components commonly used in coal-fired catalysts are mainly transition metal elements, fe, cu and Ni are the most common, and rare earth elements and the like. Alkali metals, alkaline earth metals, etc. are also typically added as auxiliary catalysts. In addition, in order to improve the dispersibility of the catalyst, surfactants such as emulsifiers, octylphenol polyoxyethylene ether and nonylphenol polyoxyethylene ether, sodium alkylbenzenesulfonate, sodium alkylpolyoxyethylene ether sulfate or sodium alkylsulfonate, polyoxyethylene ether, sulfuric acid, dodecene, dimethyl sulfoxide, CAB cocoamidopropyl betaine, etc., or organic solvents such as kerosene, coal liquefied oil, tar, polyoxyethylene castor oil, etc. will also be used.
There are related patents in which a solution-type catalyst is prepared using a pure chemical agent as an active ingredient. The patent CN 103103006a uses a catalyst solution prepared from ferrous chloride, potassium chloride, calcium chloride, octylphenol polyoxyethylene ether, sodium dodecylbenzene sulfonate, and sodium methylenedinaphthyl sulfonate. Through the activation treatment of tourmaline, the efficacy of the catalyst is further improved, and the effects of saving coal and fixing sulfur are remarkable. Patent CN 1042934120A discloses a preparation method of a desulfurization, dust removal and coal combustion promoter, which is characterized in that potassium nitrate, aluminum nitrate, calcium carbonate, potassium permanganate, soluble starch, ferric chloride and betaine are uniformly mixed to obtain the coal desulfurization, dust removal and coal combustion promoter. Patent CN 104293411A discloses that lanthanum nitrate, copper nitrate, ferric nitrate, lauryl polyoxyethylene ether, methyltrimethoxysilane and water are dissolved and then mixed uniformly, and the obtained viscous liquid is a coal combustion catalyst. Although the catalyst prepared by adopting the pure chemical reagent has better catalytic performance, the problems that the active components of the catalyst are easy to agglomerate and grow up, are difficult to concentrate, are easy to separate out in the storage process, influence the catalytic efficiency, have higher raw material cost and the like exist. In order to reduce the cost of raw materials, there are related patents for preparing coal-fired catalysts from waste liquid. The patent CN 101838573B uses chemical plating waste liquid, electrolytic aluminum waste residue filtrate, zinc mine waste liquid, composite light rare earth and nonionic surfactant to compound a catalyst. After the product of the invention is added into coal, the change of the heat value of the coal is tested by an oxygen bomb method, so that the effects of saving coal and reducing pollutant emission can be achieved. Patent CN 108659910A discloses a coal combustion catalyst, which mainly comprises ferrous sulfate, composite light rare earth, ionic surfactant, nickel salt, emulsifying agent and electrolyte waste liquid. The catalyst and coal are mixed, and the light rare earth, nickel salt and ferrous sulfate have certain catalytic action, so that the activation energy for carbon atoms is reduced when the coal is combusted, the combustion speed of the coal is improved, the recycling of waste gas substances is realized, and the pollution of heavy metals to the environment is reduced. Although the catalyst prepared by the waste liquid can realize resource utilization and reduce the cost of raw materials to a certain extent, the chemical components in the waste liquid are complex, and a large amount of organic components possibly affect the catalytic activity, and meanwhile, the problem that the solution-type catalyst is unstable and easy to agglomerate and separate out is not solved.
The related patent loads alkaline earth metal and transition metal salts in natural clay minerals (such as natural zeolite, bauxite, montmorillonite, etc.), and can prepare the coal-fired catalyst with certain performance. Patent CN 106439C discloses a method for preparing a zeolite and FeSO 4 、Cu(NO 3 ) 2 、H 2 GeO 3 The catalyst prepared from the saturated solution can improve the combustion efficiency of coal and effectively reduce the emission of harmful gases. Patent CN107362831A uses quicklime, bauxite, ferric chloride, calcium chloride, tourmaline powder, ethanolamine, surfactant, rare earth oxide, rare earth chloride and waterThe coal combustion catalyst is formed, so that the coal combustion efficiency is improved, the pollutant emission is reduced, and the clean combustion of coal is realized. The adoption of the loading method can fully utilize active components such as transition metal, alkaline earth metal and the like to realize the stabilization of the active components, but the natural minerals are insufficiently combusted, ash is increased, and the catalyst efficiency is reduced. In addition, there are also related patents for preparing catalysts using industrial solid wastes in order to reduce the cost of raw materials. Patent CN107362831A discloses a catalyst prepared from needle coke, coal tar, xylene, alcohols, carbide slag, iron slag, nitrate, manganese compounds and the like, which is used for increasing the combustion temperature of coal and reducing SO by reducing the activation energy of carbon oxidation reaction 2 And the emission of NOx, thereby achieving the aim of clean combustion. Patent CN 104178240A discloses a method for preparing coal-fired catalyst by using high-iron solid waste, which comprises the steps of finely grinding and screening the high-iron solid waste with iron content more than or equal to 20%, modifying by using calcium-based slurry, and drying to prepare the catalyst finished product. Compared with the prior art, the method can utilize calcium-based slurry to modify high-iron solid waste, dry and disperse the high-iron solid waste by utilizing an air flow crushing technology, and realize the tight loading of the catalyst and coal dust by utilizing a solid particle ball milling technology, so that the high-iron solid waste is used as the coal dust catalyst. The catalyst is prepared by directly adopting solid waste, and the catalyst with certain performance can be prepared, but the catalyst active components are often insufficient, so that the catalyst consumption is large, and the ash content of combustion is easy to increase. Therefore, the preparation method of the economic and efficient coal-fired catalyst has great social value and environmental benefit for industrial application.
Disclosure of Invention
In view of the above drawbacks and shortcomings of the prior art, a primary object of the present invention is to provide a method for preparing a sol-gel type coal-fired catalyst using electroplating sludge. According to the method, firstly, the catalyst can be prepared by utilizing industrial waste, the production cost of the catalyst is reduced, secondly, the prepared catalyst is a uniform sol-gel product, compared with the traditional solution type catalyst, the transportation cost is reduced, the problem of effective component precipitation failure is avoided, thirdly, the catalyst can reduce the combustion temperature of coal dust, reduce the emission of pollutants, and realize certain environmental protection benefit.
Another object of the present invention is to provide a sol-gel type coal-fired catalyst prepared by the above method.
It is still another object of the present invention to provide a method of using the above sol-gel type coal-fired catalyst.
The invention aims at realizing the following technical scheme:
a method for preparing a sol-gel type coal-fired catalyst by using electroplating sludge comprises the following preparation steps:
(1) Drying, grinding and sieving the electroplating sludge, and then adding inorganic acid for acid leaching treatment to obtain electroplating sludge pickle liquor;
(2) Diluting the electroplating sludge pickling solution obtained in the step (1) with water, and then adding an alkali solution to perform pH adjustment to obtain a coal-fired catalyst initial solution;
(3) Adding a certain amount of complexing agent into the initial solution of the coal-fired catalyst obtained in the step (2), fully and uniformly mixing, and evaporating and concentrating until the solution is in a colloid state to obtain the Sol-Gel type coal-fired catalyst.
Further, the type of the plating sludge in the step (1) includes, but is not limited to, plating sludge containing at least one element of iron, copper and nickel.
Further, in the step (1), the grinding and sieving means sieving through a 200-mesh sieve.
Further, the inorganic acid in the step (1) may be, but is not limited to, hydrochloric acid, nitric acid, sulfuric acid, etc.
Further, in the step (1), means such as auxiliary heating and ultrasonic treatment are adopted to promote leaching of metals in the electroplating sludge.
Further, the alkaline solution in step (2) includes, but is not limited to, potassium hydroxide, sodium hydroxide solution, and the like.
Further, the pH adjustment in the step (2) means that the pH value is adjusted to 5-8.
Further, the complexing agent in step (3) includes, but is not limited to, citric acid, ethylenediamine tetraacetic acid (EDTA), tartaric acid, glycine, or one or more of the above organic reagents such as potassium, sodium, ammonium salts, and the like.
Further, the addition amount of the complexing agent in the step (3) is 1-5% of the mass of the electroplating sludge pickle liquor.
The sol-gel type coal-fired catalyst is prepared by the method.
The application method of the sol-gel type coal-fired catalyst comprises the following steps:
the sol-gel type coal-fired catalyst is uniformly mixed with a solvent to obtain a solution with uniform components, the solution is sprayed on the surface of coal, and then the solution enters a combustion chamber for combustion.
Further, the types of solvents include, but are not limited to, water, kerosene, tar, and the like.
The process flow diagram of the preparation process and the use process of the sol-gel type coal-fired catalyst is shown in figure 1.
The technical principle of the invention is as follows: firstly, in order to reduce the cost, electroplating sludge with iron, copper and nickel as main components is used, and inorganic acid such as hydrochloric acid is used for dissolution, so that a solution containing transition metal components is obtained. Next, in order to prevent the catalyst from agglomerating, we use an organic complexing agent including one or more organic reagents having a metal ion complexing function including citric acid, ethylenediamine tetraacetic acid (EDTA), tartaric acid, glycine, potassium sodium ammonium salts thereof, and the like, and are not limited to the above-mentioned ones. According to a certain complexing proportion, the mixture is put into a transition metal solution, the pH value is regulated to be 5-8 by sodium hydroxide or potassium hydroxide, and the solution is evaporated and concentrated to obtain Sol-Gel. The Sol-Gel is easy to dissolve with water again in any proportion, facilitates enterprises to flexibly proportion according to actual demands, is convenient and efficient to use, and has low transportation cost of the catalyst. Finally, when in use, the prepared Sol-Gel catalyst and the solvent are mixed according to a certain proportion to obtain a coal-fired catalyst solution with uniform components, and the solution is mixed with coal dust according to a certain proportion to be combusted in a combustion chamber.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention utilizes the effective components in the electroplating sludge solid waste, has low cost, adopts the complexing agent to prepare the Sol-Gel type coal-fired catalyst, has higher economic benefit and can realize the recycling of industrial waste.
(2) The Sol-Gel type coal-fired catalyst can effectively avoid catalyst precipitation and agglomeration, can greatly reduce the volume and weight of the catalyst, and is convenient for transportation.
(3) The Sol-Gel type coal-fired catalyst can be dissolved with a solvent (water, kerosene and the like) in any proportion to obtain a catalyst solution with uniform components, and the catalyst solution is sprayed on the surface of coal, so that enterprises can conveniently and flexibly proportion the solution according to different actual requirements and application scenes.
(4) The complexing agent in the Sol-Gel type coal-fired catalyst can directly emit heat and generate gas in the combustion process, thereby greatly reducing ash generated by introducing the catalyst.
(5) The Sol-Gel type coal-fired catalyst has higher catalytic activity, can change the combustion characteristics of coal dust, improve the combustion efficiency, reduce the temperature of coal, and simultaneously can also realize desulfurization and denitrification and reduce the emission of pollutants.
Drawings
FIG. 1 is a process flow diagram of the preparation process and the use process of the sol-gel type coal-fired catalyst of the invention;
FIG. 2 is a graph of loss on ignition for a raw coal sample and a coal-fired catalyst sample in an embodiment of the invention;
FIG. 3 is a graph of the loss on ignition rate of a raw coal sample and a coal-fired catalyst sample in an embodiment of the invention;
FIG. 4 is a graph showing the differential heat of the raw coal sample and the catalyst sample with coal in the example of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
Example 1
The method for preparing the Sol-Gel type coal-fired catalyst by using the electroplating sludge in the embodiment comprises the following steps:
(1) 200g of electroplated copper sludge is taken as is, placed in an oven, and subjected to drying treatment for 12 hours at the temperature of 105 ℃; grinding the dried electroplating sludge, and sieving the electroplating sludge with a 200-mesh sieve. XRF testing was performed on the sieved plating sludge, which was found to contain Cu (38.3448%), ca (15.9544%), fe (14.2923%), mg (6.5059%), mn (3.5565%), na (0.3056%).
(2) 1g of the electroplating sludge treated in the step (1) is placed in a conical flask, 30ml of dilute nitric acid with the concentration of 3mol/L is added into the flask, the conical flask is placed in a shaking table, the temperature is set to be 25 ℃, the rotating speed is 200r/min, and then the ultrasonic treatment is carried out for 30min to obtain the electroplating sludge pickling solution.
(3) 10ml of electroplating sludge pickle liquor is taken, 490ml of deionized water is added, the mixture is uniformly mixed, 1mol/L KOH is added to adjust the pH of the solution to 5, and the initial solution of the coal-fired catalyst is obtained.
(4) Adding 0.05g of sodium citrate into the initial solution of the coal-fired catalyst, transferring the solution into a round-bottom flask, stirring and heating until the solution is colloidal, and obtaining the final colloidal high-activity coal-fired catalyst.
Example 2
The method for preparing the Sol-Gel type coal-fired catalyst by using the electroplating sludge in the embodiment comprises the following steps:
(1) Taking 200g of original nickel plating mud, placing the original nickel plating mud into an oven, setting the temperature of the oven to 105 ℃, and drying for 12 hours; grinding the dried electroplating sludge, and sieving the electroplating sludge with a 200-mesh sieve. XRF testing was performed on the sieved plating sludge, and it was found that the plating sludge contained Ca (28.3448%), fe (16.3144%), ni (13.6556%), cu (7.2923%), cr (6.5059%), mg (5.5565%), na (0.3056%), and K (0.2001%).
(2) 1g of the electroplating sludge treated in the step (1) is placed in a conical flask, 30ml of dilute nitric acid with the concentration of 3mol/L is added into the flask, the conical flask is placed in a shaking table, the temperature is set to be 25 ℃, the rotating speed is 200r/min, and then the ultrasonic treatment is carried out for 30min to obtain the electroplating sludge pickling solution.
(3) 10ml of electroplating sludge pickle liquor is taken, 490ml of deionized water is added, the mixture is uniformly mixed, 1mol/L NaOH is added to adjust the pH of the solution to 5, and the initial solution of the coal-fired catalyst is obtained.
(4) Adding 0.05g of sodium citrate into the initial solution of the coal-fired catalyst, transferring the solution into a round-bottom flask, stirring and heating until the solution is colloidal, and obtaining the final colloidal high-activity coal-fired catalyst.
Example 3
The method for preparing the Sol-Gel type coal-fired catalyst by using the electroplating sludge in the embodiment comprises the following steps:
(1) 200g of copper-nickel-containing mixed electroplating sludge is taken as is, placed in an oven, and subjected to drying treatment for 12 hours at the temperature of 105 ℃; grinding the dried electroplating sludge, and sieving the electroplating sludge with a 200-mesh sieve. XRF testing was performed on the sieved plating sludge, and it was found that the plating sludge contained Fe (29.2617%), ni (28.6214%), ca (13.6216%), cu (11.0942%), al (5.2782%), sn (0.6971%), na (0.2882%), mg (0.2355%).
(2) 1g of the electroplating sludge treated in the step (1) is placed in a conical flask, 30ml of dilute nitric acid with the concentration of 3mol/L is added into the flask, the conical flask is placed in a shaking table, the temperature is set to be 25 ℃, the rotating speed is 200r/min, and then the ultrasonic treatment is carried out for 30min to obtain the electroplating sludge pickling solution.
(3) 10ml of electroplating sludge pickle liquor is taken, 490ml of deionized water is added, the mixture is uniformly mixed, and 1mol/L KOH is added to adjust the pH of the solution to 6, thus obtaining the initial solution of the coal-fired catalyst.
(4) Adding 0.05g of sodium tartrate into the initial solution of the coal-fired catalyst, transferring the solution into a round-bottom flask, stirring and heating until the solution is colloidal, and obtaining the final colloidal high-activity coal-fired catalyst.
The performance of the coal-fired catalyst obtained in the above examples was evaluated:
1. water solubility: taking 20ml of sol catalyst, respectively adding 80ml, 180ml and 480ml of water, stirring for 10min to obtain transparent solution, standing for 15 days, 30 days, 60 days and 120 days, wherein no precipitate is generated at the bottom of the solution, which indicates that the prepared sol catalyst has good water solubility and no phenomena of precipitation, crystallization, precipitation and the like in the storage process.
2. Combustion characteristics:
(1) Sample preparation: a certain amount of raw coal is placed in a cuvette and is numbered as raw coal sample and coal-adding catalyst sample, the sol coal-burning catalyst prepared in the embodiment 3 is taken, a uniform catalyst solution is obtained according to the ratio of the catalyst to water of 1:20, and the weight ratio of the coal-burning catalyst solution to the coal is 1:20000, and the sol coal-burning catalyst is added into the coal-adding catalyst sample and stirred uniformly.
(2) Thermogravimetric analysis and fire behavior analysis:
through a thermogravimetric experiment, a thermogravimetric curve and a differential thermal curve of a raw coal sample and a coal-added catalyst can be obtained, as shown in figures 2, 3 and 4; the ignition temperature of the coal can be obtained by thermogravimetric curve analysis, as shown in table 1.
TABLE 1 ignition temperature
Analysis shows that the ignition temperature of the added coal catalyst sample is lower than that of the raw coal sample, which indicates that the coal catalyst can reduce the ignition temperature of the coal, so that the coal is easy to burn.
(3) Combustion and emission characteristics analysis:
and (3) adopting a horizontal tube furnace experiment bench and a high-temperature cracker and gas chromatography-mass spectrometry analysis system to respectively carry out combustion experiments on the raw coal sample and 2 samples of the coal-added catalyst, and carrying out evaluation study on the combustion condition and the production of pollutants.
The burn-out rates of the samples at different temperatures are shown in Table 2, and the burn-out rates of the samples with the coal catalyst are improved compared with the raw coal samples, so that the catalyst can promote the complete combustion of the coal and improve the combustion utilization rate of the coal.
TABLE 2 burnout Rate of samples at different temperatures
Table 3 shows the peak data of pollutant release during sample combustion, and the pollutant NOx and SO after adding coal-burning catalyst to raw coal 2 The highest peak of the release is reduced, which indicates that the prepared coal-fired catalyst can reduce the emission of pollutants.
TABLE 3 NO in combustion process x And SO 2 Peak at maximum
In summary, the invention uses the electroplating sludge industrial solid waste as the raw material, and adds a certain amount of complexing agent to prepare the colloidal coal-fired catalyst, and the catalyst can effectively reduce the ignition point of raw coal, improve the utilization rate of coal and reduce the release of coal-fired pollutants, thereby reducing the influence of coal on environmental pollution. The method provided by the invention has the advantages of simple process flow, easiness in operation, wide raw material sources, low price and capability of realizing the recycling of industrial wastes, and the prepared coal-fired catalyst product has high-efficiency catalytic performance, is easy to store and transport, and can realize certain economic and environmental benefits.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.

Claims (7)

1. The method for preparing the sol-gel type coal-fired catalyst by using the electroplating sludge is characterized by comprising the following preparation steps:
(1) Drying, grinding and sieving the electroplating sludge, and then adding inorganic acid for acid leaching treatment to obtain electroplating sludge pickle liquor;
(2) Diluting the electroplating sludge pickling solution obtained in the step (1) with water, and then adding an alkali solution to perform pH adjustment to obtain a coal-fired catalyst initial solution;
(3) Adding a certain amount of complexing agent into the initial solution of the coal-fired catalyst obtained in the step (2), fully and uniformly mixing, and then evaporating and concentrating until the solution is in a colloid state to obtain a sol-gel type coal-fired catalyst;
the electroplating sludge in the step (1) is electroplating sludge containing at least one element of iron, copper and nickel;
the alkali solution in the step (2) is potassium hydroxide or sodium hydroxide solution; the pH adjustment means that the pH value is adjusted to 5-8;
the complexing agent in the step (3) is citric acid, EDTA, tartaric acid, glycine or at least one of potassium, sodium and ammonium salts of citric acid, EDTA, tartaric acid and glycine; the addition amount of the complexing agent is 1 per mill-5% of the mass of the electroplating sludge pickle liquor.
2. The method for preparing a sol-gel type coal-fired catalyst by using electroplating sludge according to claim 1, wherein the grinding and sieving in the step (1) means sieving through a 200-mesh sieve.
3. The method for preparing a sol-gel type coal-fired catalyst by using electroplating sludge according to claim 1, wherein the inorganic acid in the step (1) is hydrochloric acid, nitric acid or sulfuric acid.
4. The method for preparing a sol-gel type coal-fired catalyst by using electroplating sludge according to claim 1, wherein the acid leaching treatment in the step (1) is performed with at least one of auxiliary heating and ultrasonic treatment.
5. A sol-gel coal catalyst prepared by the method of any one of claims 1-4.
6. The method for using the sol-gel type coal-fired catalyst as claimed in claim 5, comprising the steps of:
the sol-gel type coal-fired catalyst is uniformly mixed with a solvent to obtain a solution with uniform components, the solution is sprayed on the surface of coal, and then the solution enters a combustion chamber for combustion.
7. The method of using a sol-gel coal combustion catalyst according to claim 6, wherein the solvent is water, kerosene or tar.
CN202210139335.6A 2022-02-15 2022-02-15 Method for preparing sol-gel type coal-fired catalyst by using electroplating sludge Active CN114405551B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210139335.6A CN114405551B (en) 2022-02-15 2022-02-15 Method for preparing sol-gel type coal-fired catalyst by using electroplating sludge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210139335.6A CN114405551B (en) 2022-02-15 2022-02-15 Method for preparing sol-gel type coal-fired catalyst by using electroplating sludge

Publications (2)

Publication Number Publication Date
CN114405551A CN114405551A (en) 2022-04-29
CN114405551B true CN114405551B (en) 2024-03-19

Family

ID=81261778

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210139335.6A Active CN114405551B (en) 2022-02-15 2022-02-15 Method for preparing sol-gel type coal-fired catalyst by using electroplating sludge

Country Status (1)

Country Link
CN (1) CN114405551B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115646502B (en) * 2022-11-07 2023-07-04 深圳仕上电子科技有限公司 Metal-supported indium vanadate, preparation method thereof and photocatalytic nitrogen fixation catalyst

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107057795A (en) * 2017-03-29 2017-08-18 合肥天沃能源科技有限公司 A kind of additive for improving coal combustion efficiency and preparation method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107057795A (en) * 2017-03-29 2017-08-18 合肥天沃能源科技有限公司 A kind of additive for improving coal combustion efficiency and preparation method thereof

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
燃煤催化剂在5000t/d水泥厂的应用研究;刘姚君;王萍生;;水泥;20200810(08);全文 *
电镀污泥处理现状及进展;张海亮;梁冬云;刘勇;;再生资源与循环经济;20170727(07);全文 *
纳米CaO-Fe(Cp)_2复合催化剂对烟煤燃烧性能的影响;闫小川;张宝军;王调妮;樊喜兵;;洁净煤技术;20191115(06);全文 *
金属化合物对工业污水污泥燃烧的催化作用及机制;刘敬勇;孙水裕;龙来寿;陈涛;陈敏婷;;中国电机工程学报;20090815(23);全文 *

Also Published As

Publication number Publication date
CN114405551A (en) 2022-04-29

Similar Documents

Publication Publication Date Title
CN114405551B (en) Method for preparing sol-gel type coal-fired catalyst by using electroplating sludge
CN109772463B (en) Catalyst ZIF-67-Me/CuO for CO reduction and low-temperature denitrationxAnd preparation method and application thereof
Xie et al. Optimizing environmental pollution controls in response to textile dyeing sludge, incineration temperature, CaO conditioner, and ash minerals
CN107573980A (en) A kind of coal supply chain combustion adjuvant and preparation method thereof
CN106140087A (en) A kind of sludge activity carbon adsorbent for sewage dephosphorization and preparation method thereof
CN111689494B (en) Non-corrosive catalyst and method for preparing activated carbon by catalytic activation
CN105238488B (en) A kind of dealkalization method of coal
CN107601570B (en) Regenerative and recyclable mercury adsorbent and preparation and regeneration methods thereof
CN102527392B (en) Ternary catalyst for catalytic coal gasification and preparation method thereof
CN100509141C (en) Method for preparing active carbon materials SO* absorbent by medicament activation method
CN112341244B (en) Method for preparing phosphorus removing agent by using mine waste residues
CN104874344A (en) Preparation method of flue gas adsorbent
CN112661427A (en) Wet grinding and high-temperature treatment integrated treatment method for waste incineration fly ash
CN101735878A (en) High-efficiency coal catalyst and preparation method thereof
CN111068615A (en) Multi-element composite adsorption material for removing vanadium and preparation method and application thereof
CN101434885A (en) Multiple-effect coal fines additive and efficient clean fire coal powder prepared thereby
JPS5824478B2 (en) How to burn fuel
CN211913798U (en) Device for preparing adsorbent for waste incineration power plant
CN111774029A (en) Preparation of PM from biomass ash2.5Method for producing adsorbent, product and application thereof
CN101705133A (en) Efficient coal-fired combustion-supporting desulfurization additive and preparation method thereof
CN108620078B (en) Catalyst, preparation method of catalyst and method for denitration of coal combustion high-temperature flue gas
CN105964131A (en) Additive for flue gas desulfurization of thermal power plant and preparation method of additive
CN105435620A (en) Denitration agent and preparation method thereof
CN102329673B (en) Efficient burning coal containing compound catalyst
CN108148649B (en) Preparation method of coal saving agent

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant