CN109628189A - A kind of moulded coal and preparation method thereof and preparation system - Google Patents
A kind of moulded coal and preparation method thereof and preparation system Download PDFInfo
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- CN109628189A CN109628189A CN201811620784.2A CN201811620784A CN109628189A CN 109628189 A CN109628189 A CN 109628189A CN 201811620784 A CN201811620784 A CN 201811620784A CN 109628189 A CN109628189 A CN 109628189A
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- moulded coal
- coal
- foam
- dynamic test
- starch
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- 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
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
- C10L5/14—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders
-
- 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
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
Abstract
The present invention provides a kind of moulded coal and preparation method thereof and preparation systems.Moulded coal of the present invention is mainly made of the raw material of following parts by weight: 70~80 parts of semi-coke foam, 20~30 parts of smokeless foam coal, 2~3 parts of adhesive and 6~10 parts of water；Described adhesive includes prehydrolysis soil dynamic test and pre-gelatinized starch, and the quality proportioning of prehydrolysis soil dynamic test and pre-gelatinized starch is (0.5-1.5): (1.5-2.5), preferably 1:2.The intensity of moulded coal of the present invention is high, thermal stability is good, improves the utilization rate of semi-coke foam, realizes the clean utilization of soil dynamic test waste material, has important application value in clean coal production technical field.
Description
Technical field
The present invention relates to clean coal production technical fields, in particular to a kind of moulded coal and preparation method thereof and preparation
System.
Background technique
Semi-coke foam is a kind of low cost, high-quality, clean fuel.With mentioning for China in Recent Years environmental protection requirement
The quantity of height, the dust and sulphur compounds that generate to fire coal proposes particular/special requirement.Since semi-coke foam has small particle and big ash
Dust content, thus be restricted in use.By semi-coke foam by bonding forming, dust in use process can be effectively reduced
Evolution, improve its efficiency of combustion.
Traditional moulded coal raw materials for production are smokeless foam coal dust and smokeless coal slime, preparation process have hot-forming and high pressure at
Type.Conventional coal briquette bond, including organic bond and inorganic bond.Inorganic bond is mainly minerals, this viscous
Mixture will affect the calorific value of moulded coal.Most of organic bonds are hydrocarbons, influence very little to the calorific value of coal.In addition,
In the environmentally friendly situation that environmental emission standard is increasingly stringenter, although semi-coke foam is low-sulfur coal, it can by it is adhesion-molded into
One step reduces sulphur emissions, therefore develops and be of great significance suitable for the adhesive of semi-coke foam.
In view of this, the present invention is specifically proposed.
Summary of the invention
The first object of the present invention is to provide a kind of moulded coal, and efficiency of combustion greatly improves, and effectively reduces energy waste,
And intensity is high, has good thermal stability, can meet civilian demand.
The second object of the present invention is to provide a kind of preparation method of moulded coal, and concise in technology is time-consuming shorter, and realizes
The efficient utilization of industrial produced wastes-soil dynamic test, improves the fuel availability of semi-coke foam, has potential application prospect.
The third object of the present invention is to provide a kind of preparation system of moulded coal.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
A kind of moulded coal is mainly made of the raw material of following parts by weight: 70~80 parts of semi-coke foam, 20~30 parts of smokeless foam coal,
2~3 parts and 6~10 parts of water of adhesive；
Described adhesive includes prehydrolysis soil dynamic test and pre-gelatinized starch, and the matter of prehydrolysis soil dynamic test and pre-gelatinized starch
Amount proportion is (0.5-1.5): (1.5-2.5), preferably 1:2.
The number of moulded coal raw material of the present invention is mass fraction.Wherein, semi-coke foam, smokeless foam coal are the masters for preparing moulded coal
Body.Semi-coke foam source is wide, at low cost, calorific value is high, and semi-coke foam can effectively reduce the ease of use process dust by molding bonded
It dissipating, while improving fuel availability, semi-coke foam is to prepare one of primary raw material of moulded coal in the present invention, mass fraction is 70~
80 parts；The introducing of smokeless foam coal can effectively improve burning time, the adhesion strength of moulded coal, but excessive introducing will cause type
Coal cost be substantially increased and the reduction of calorific value, the content of smokeless foam coal is only second to semi-coke foam in the present invention, and mass fraction is
20~30 parts.
China is that maximum potato producing country, cultivated area account for the 1/4 of the world in the world, and total output accounts for about the 1/5 of the world.
With the change of the industrial structure, potato process deeply industry is also being rapidly developed.At present in China's most area, potato processing master
If extracting starch, but with the development of starch industry, soil dynamic test (i.e. potato extracts the waste residue after starch) pollution problem is also got over
Come more serious.According to the literature, there be more than 700 large and medium-sized starch factory in current China, annual to discharge potato residue about 4,000,000
Ton.
The composition of soil dynamic test includes a small amount of residual starch and a small amount of protein etc., in order to rationally be utilized to soil dynamic test,
The present inventor it is carried out pre-gelatinized using the adhesive as moulded coal carry out using；However, being pasted in advance the study found that being used alone
The soil dynamic test of change is applied in combination with conventional pre-gelatinized starch, can not obtain good practical application effect, be studied, discovery
Reason may is that the soil dynamic test by pre-gelatinized has certain adhesiveness, however its adhesion strength is still unable to satisfy moulded coal
Molding requirement even still cannot achieve actually active application in conjunction with other organic bonds.Therefore, by pretreatment side
The adhesive strength of formula raising soil dynamic test is the top priority as coal briquette bond.
Present inventor has performed a large amount of experimental studies, the results showed that, soil dynamic test is carried out using alkali steam or acid vapor
Handling obtained prehydrolysis soil dynamic test can solve the above problems well, and reason may is that alkali steam or acid vapour pair
Soil dynamic test is handled, and the pre-gelatinized of starch in soil dynamic test is on the one hand realized, and is on the other hand realized to albumen in soil dynamic test
The degradation of the ingredients such as matter, protein hydrolysis after produce a large amount of amino acid and carboxylic group, both groups be easy and
The hydroxyl group on semi-coke surface forms hydrogen bond, significantly improves the adhesion strength of adhesive, can meet and glue needed for briquette molding
With joint efforts.
In consideration of it, adhesive of the present invention includes prehydrolysis soil dynamic test and pre-gelatinized starch；Wherein, prehydrolysis soil dynamic test
Refer to the soil dynamic test handled through alkali steam or acid vapor.Contain partial starch and protein in soil dynamic test, through vapor peracids/alkali
After steam treatment, starch pre-gelatinized, adhesiveness enhancing, while protein hydrolyzes, and produces a large amount of amino and carboxylic group, this
Two kinds of groups are easy and the hydroxy combining on semi-coke surface, form hydrogen bond, further enhance the adhesive strength of adhesive, solve simultaneously
China's soil dynamic test waste material can not effectively cleaning treatment problem, effectively reduce adhesive cost.
In the present invention, pre-gelatinized starch can use the pre-gelatinized starch of this field routine, can also use routine side
Formula carries out pre-gelatinized to starch to prepare pre-gelatinized starch, and pre- paste can also be prepared while preparing above-mentioned prehydrolysis soil dynamic test
Change starch, obtains prehydrolysis soil dynamic test while can handling at this time by alkali steam or acid vapor soil dynamic test and starch
And pre-gelatinized starch.
The quality proportioning of prehydrolysis soil dynamic test and pre-gelatinized starch in adhesive of the invention are as follows: (0.5-1.5): (1.5-
2.5), more preferably 1:2, the quality proportioning range are conducive to improve the adhesion strength of adhesive, meet briquette molding condition.This
Outside, adhesive mass fraction be 2~3 parts when can meet shaped coal technology production target, while can effectively improve adhesive strength,
Production cost is controlled, processing parameter is met.
The raw material of moulded coal of the present invention further includes water, can enable semi-coke foam, smokeless foam coal complete wetting, to promote
Into its molding.The content of water needs appropriate in the raw material of moulded coal of the present invention, can meet semi-coke foam and the abundant of smokeless foam coal soaks i.e.
Can, specifically, the raw material of the moulded coal, including 6~10 parts of water.
The present invention to the preparation method of adhesive with no restriction, as long as above-mentioned hydrolyse potato slag can be obtained and pre-gelatinized is formed sediment
Powder.In described adhesive, the pre-gelatinized starch that starch gelatinization is formed has certain cementation, and through prehydrolysis shape
At prehydrolysis soil dynamic test in there is the small molecules group such as amino acid and carboxyl, thus the hydroxyl group combination shape with semi-coke surface
At hydrogen bond, adhesive strength is improved, the molding of moulded coal is promoted.Specifically, alkali steam treatment or acid vapor processing can be used in prehydrolysis.
In one embodiment, prehydrolysis soil dynamic test and pre-gelatinized starch of the present invention are by alkali steam to soil dynamic test
It is handled with starch；Preferably, the pH value of the alkali steam is 8-9；Preferably, the temperature of processing is 60-100
DEG C, the processing time is 0.1~0.5h.After being passed through alkali steam, the mean temperature of soil dynamic test and starch can reach 60-70 DEG C, surface
Temperature can reach 80~100 DEG C, and in this stage, pre-gelatinized occurs for the partial starch in common starch and soil dynamic test, be formed
Sticky paste, viscosity steeply rise；At the same time, the protein in soil dynamic test starts to hydrolyze under the action of alkali steam, produces
The hydroxy combining on raw a large amount of amino acid and carboxylic group, both groups and semi-coke surface forms hydrogen bond, substantially increases viscous
The adhesion strength of mixture, bonding force needed for meeting briquette molding improve the intensity of moulded coal.The alkali steam is to contain alkali
Property substance steam, can by alkaline solution heat be made；The present invention does not have particular/special requirement to the type of alkaline matter, as long as
The pH value of steam can be made between 8~9, it is preferable that alkaline matter includes at least one of sodium hydroxide, potassium hydroxide.
In another embodiment, prehydrolysis soil dynamic test and pre-gelatinized starch of the present invention are by acid vapor to potato
What slag and starch were handled；Preferably, the pH value of the acid vapor is 4-6；Preferably, the temperature of processing is 60-100
DEG C, the processing time is 0.1~0.5h.After being passed through acid vapor, the mean temperature of soil dynamic test and starch can reach 60-70 DEG C, surface
Temperature can reach 80~100 DEG C, and in this stage, pre-gelatinized occurs for the partial starch in common starch and soil dynamic test, be formed
Sticky paste, viscosity steeply rise；At the same time, the protein in soil dynamic test starts to hydrolyze under the action of acid vapor, produces
The hydroxy combining on raw a large amount of amino acid and carboxylic group, both groups and semi-coke surface forms hydrogen bond, substantially increases viscous
The adhesion strength of mixture, bonding force needed for meeting briquette molding improve the intensity of moulded coal.The acid vapor is to contain acid
Property substance steam, can by acid solution heat be made；The present invention does not have particular/special requirement to the type of acidic materials, as long as
The pH value of steam can be made between 4~6, it is preferable that acidic materials include at least one of hydrochloric acid, sulfuric acid and nitric acid.
The present invention does not make particular/special requirement to starch used in adhesive, heats easily gelatinization, it is preferable that the starch
Selected from least one of cornstarch, tapioca and wheaten starch, more preferably cornstarch.
Further, when carrying out above-mentioned processing, the quality proportioning that can control soil dynamic test and starch is (0.5-1.5):
(1.5-2.5).Research shows that: addition soil dynamic test excessively will affect the adhesive property of adhesive, and reason may is that soil dynamic test mistake
Cannot effectively make breaks down proteins when more, thus the soil dynamic test of above-mentioned suitable quality proportion be conducive to improve adhesive bonding it is strong
It spends, meet briquette molding condition.
The preparation process of the above-mentioned adhesive of the present invention is succinct, easy to operate, and the adhesion strength of adhesive is high, has good general
Adaptive has important application value in the production technical field of moulded coal.
In the present invention, the full water < 6% of the moulded coal；Volatile matter < 12%；Calorific value > 5700kcal/kg；Cold pressing
Intensity > 600N；Sulphur < 0.5%.Briquette strength height, the thermal stability for meeting the quality requirement are good, high combustion efficiency, semi-coke foam
Utilization rate it is high.
In the present invention, the partial size of the semi-coke foam is less than 40mm；The partial size of the smokeless foam coal is less than 40mm, consequently facilitating
The subsequent processings such as crushing.In addition, the present invention does not limit semi-coke foam, smokeless foam coal strictly, the original of this field routine can be used
Material.Specifically, the full water < 10% of the semi-coke foam, volatile matter < 10%, calorific value > 5700kcal/kg, sulphur < 0.5%；
The full water < 5% of the smokeless foam coal, volatile matter < 10%, calorific value > 4500kcal/kg, sulphur < 0.5%.
The present invention also provides a kind of preparation methods of moulded coal, comprising the following steps:
Semi-coke foam, smokeless foam coal, soil dynamic test and starch and water are mixed, in mixed process, steamed using alkali steam or acid
Vapour handles mixed material, then suppresses, obtains the moulded coal；
Preferably, the mixing includes the first order mixing, second level mixing and third level mixing successively carried out, the place
Reason carries out in the mixed process of the second level.
In the above preparation method, by the way of one-step method, i.e. the pretreatment of adhesive, the wetting of material and bonding
Molding carries out simultaneously；This process is divided into three phases: the first stage, is passed through tap water, and material and adhesive have been able to
Full wetting, prepares for the processing of adhesive and the bonding of material；Second stage, is passed through alkali steam or acid vapor, material and viscous
Mixture mean temperature is up to 60~70 DEG C, and surface temperature is up to 90~110 DEG C, in this stage, in common starch and soil dynamic test
Starch be sufficiently gelatinized, the protein in soil dynamic test hydrolyzes under the action of strong acid or highly basic, produces a large amount of amino acid, carboxylic
The hydroxy combining on base group, these two types of groups and semi-coke surface forms hydrogen bond, substantially increases adhesive strength, further promotes
Material it is adhesion-molded；Phase III, material have entered the adhesion-molded stage, have been passed through tap water, provide and fill for the molding of material
The moisture of foot, to promote its adhesion-molded.The total water consumption for controlling water and alkali steam or acid vapor is 6~10 parts.
The present invention also provides a kind of preparation methods of moulded coal, comprising the following steps:
Soil dynamic test and starch are handled using alkali steam or acid vapor, obtain described adhesive；
Semi-coke foam, anthracite, adhesive and water are mixed by weight, then suppresses, obtains the moulded coal.
In the above preparation method, after first pre-processing to soil dynamic test and starch, the soil dynamic test of prehydrolysis and pre- is obtained
The starch of gelatinization is blended into semi-coke foam and anthracite, is stirred, bonding, compression moulding.It is carried out in advance to soil dynamic test and starch
When processing, it is passed through suitable alkali steam or acid vapor, tap water, so that starch pre-gelatinized, protein prehydrolysis in soil dynamic test is raw
At a large amount of amino acid and carboxylic group.After material and adhesive are mixed, stirring is passed through tap water, makes semi-coke foam and anthracite
Complete wetting, the amino acid and carboxylic group and the hydroxyl on semi-coke surface that protein hydrolysis generates in adhesive form hydrogen bond, greatly
Bonding force is enhanced greatly, and then promotes the adhesion-molded of material.The total water consumption for controlling water and alkali steam or acid vapor is 6~
10 parts.
In above two preparation method, to mix semi-coke foam, smokeless foam coal preferably with adhesive, molding bonded,
Semi-coke foam, smokeless foam coal can be further crushed, it is preferable that semi-coke foam and smokeless foam coal dust are broken to partial size before mixing
Less than 3mm.In addition, the presence in view of water has adverse effect the fuel of moulded coal, therefore preparation method of the invention, suppressing
It later further include drying steps, so that the full water < 6% of the moulded coal.Implementation and condition to drying steps are not made strictly
Limitation, as long as the full water content in moulded coal can be made to control to necessary requirement, and will not adversely affect the quality of moulded coal
?.Specifically, the drying mode can be drying；Wherein, the drying temperature can be 140 DEG C~160 DEG C, described dry
The dry time can be 1h~1.5h.Drying steps are in addition to for removing the moisture in moulded coal, additionally it is possible to make the shallow lake in adhesive
The further pre-gelatinized of powder, to further improve adhesion strength.
According to a kind of moulded coal prepared by above-mentioned preparation method, Quan Shui < 6%, volatile matter: < 12%, calorific value >
5700kcal/kg, cold pressing strength > 600N, sulphur < 0.5%, not only high combustion efficiency, reduces energy waste, and intensity is high,
With good thermal stability, civilian demand can be met.
In the present invention, full water refers to whole free moistures, i.e. the sum of free moisture and inherent moisture.
The present invention also provides a kind of preparation systems of moulded coal, comprising:
Mixing device, with first entrance end, second entrance end and outlet end；
For providing the pretreatment unit of alkali steam or acid vapor, it is connected to the second entrance end of the mixing device；
The outlet end of the mixing device is arranged in pressure setting.
Preferably, the preparation system further includes grinding device, and outlet end passes through transmitting device and the mixing device
First entrance end connection.Grinding device is used to for semi-coke foam, smokeless foam coal being further ground into the material that partial size is less than 3mm.
Preferably, the preparation system further includes proportioner, the outlet end of the proportioner by transmitting device with
The arrival end of the grinding device connects.Proportioner is used to prepare each raw material according to parts by weight.
Preferably, the preparation system further includes the bin stock dress being arranged between the grinding device and the mixing device
It sets, outlet end is connect by transmitting device with the first entrance end of the mixing device.Storage appts. for store material with
Guarantee that it is uniformly delivered in mixing device.
Preferably, the preparation system further includes the charging gear that mixing device first entrance end is arranged in.Feed
Device for quantitatively conveying starch and soil dynamic test by weight, to mix with the realization of other raw materials.
Preferably, the preparation system further includes the drying device that the pressure setting outlet end is arranged in.Drying device
For removing water to pressed moulded coal, while the further pre-gelatinized of the starch in adhesive can be made, it is strong to improve bonding
Degree.
Preferably, the preparation system further includes fume extractor, and the drying device has exhanst gas outlet, the smoke evacuation dress
It sets and is connect with the exhanst gas outlet of the drying device.
In the present invention, the mixing arrangement may include sequentially connected first rabbling mechanism, the second rabbling mechanism and
Third rabbling mechanism, the first entrance end are arranged on the first rabbling mechanism, and the second entrance end setting is in the second stirring
In mechanism, the outlet end is arranged on third rabbling mechanism.It is simultaneously real that setting three-level rabbling mechanism can be such that material is sufficiently mixed
The abundant pre-gelatinized and prehydrolysis of existing soil dynamic test and starch；Wherein, the first rabbling mechanism ensure that semi-coke foam, smokeless foam coal, soil
Bean dregs and starch are sufficiently mixed, the second rabbling mechanism realized while mixing soil dynamic test and starch abundant pre-gelatinized and
Prehydrolysis, third rabbling mechanism ensure that the abundant bonding of semi-coke foam, smokeless foam coal.
Preferably, the pretreatment system includes solution preparation device and steam boiler, the arrival end of the steam boiler
It is connected to the solution preparation device, the outlet end of the steam boiler is connected to the second entrance end.Preferably, described molten
Liquid device for formulating can be formulated for forming the alkaline solution of alkali steam or be formulated for forming the acid solution of acid vapor, steam copper
Furnace is for being thermally formed alkali steam for alkaline solution or acid solution being thermally formed acid vapor.
Preferably, the preparation system further includes water system, and the water system has for the first rabbling mechanism
Supply water the first water supply line, the second water supply line for supplying water to solution preparation device and for third rabbling mechanism supply
The third water supply line of water.First water supply line is used to lead into the mixed material of semi-coke foam, smokeless foam coal, soil dynamic test and starch
To guarantee that it is sufficiently mixed, the second water supply line is used to provide the water for preparing solution to solution preparation device water, specifically,
For providing the water for preparing lye or acid solution to solution preparation device；Third water supply line is used for semi-coke foam, smokeless foam coal, pre-
Water flowing is in the mixed material of hydrolyse potato slag and pre-gelatinized starch to guarantee that it is sufficiently bonded.
Preferably, flow is respectively arranged on first water supply line, the second water supply line and third water supply line
Meter.The dosage for the water that flowmeter is used to provide each water supply line controls, so that total water consumption control is at 6~10 parts.
A kind of preparation system of moulded coal of the present invention, is connected by transmitting device between each device, and material can pass through
Transmitting device transmission, preparation system realizes automation, can save the time, shortening process flow, it is only necessary to which periodic cleaning device is
It can.
Compared with prior art, the invention has the benefit that
The present invention provides a kind of moulded coal, using prehydrolysis soil dynamic test and pre-gelatinized starch as adhesive, adhesive strength
Height, low in cost, universality is strong, has important application value in clean coal production technical field.Moulded coal prepared by the present invention
Not only high combustion efficiency reduces energy waste, and intensity is high, has good thermal stability, can meet civilian demand.This hair
The bright concise in technology for preparing moulded coal, it is time-consuming shorter, and the efficient utilization of industrial produced wastes-soil dynamic test is realized, it improves
The fuel availability of semi-coke foam has potential application prospect in clean coal production technical field.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of moulded coal preparation system of the present invention.
Appended drawing reference:
1- proportioner；2- transmitting device；3- grinding device；4- transmitting device；5- Storage appts.；6- charging gear；7-
Transmitting device；The first rabbling mechanism of 8-；The second rabbling mechanism of 9-；10- third rabbling mechanism；11- solution preparation device；12- steams
Boiler furnace；13- transmitting device；14- pressure setting；15- transmitting device；16- fume extractor；17- drying device.
Wherein solution preparation device can be used for preparing the acid solution for generating acid vapor or prepare the alkalinity for generating alkali steam
Solution.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with the drawings and specific embodiments, but
Be it will be understood to those of skill in the art that it is following described embodiments are some of the embodiments of the present invention, rather than it is whole
Embodiment is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.Based on the embodiments of the present invention, ability
Domain those of ordinary skill every other embodiment obtained without making creative work, belongs to guarantor of the present invention
The range of shield.The person that is not specified actual conditions in embodiment, carries out according to conventional conditions or manufacturer's recommended conditions.Agents useful for same
Or production firm person is not specified in instrument, is the conventional products that can be obtained by commercially available purchase.
Although illustrate and describing the present invention with specific embodiment, it will be appreciated that the above various embodiments is only used
To illustrate technical solution of the present invention, rather than its limitations；Those skilled in the art should understand that: without departing substantially from this hair
It in the case where bright spirit and scope, is possible to modify the technical solutions described in the foregoing embodiments, or to wherein
Some or all of technical characteristic is equivalently replaced；And these are modified or replaceed, and do not make the essence of corresponding technical solution
It departs from the scope of the technical solutions of the embodiments of the present invention；It is, therefore, intended that in the following claims including belonging to the present invention
All these substitutions and modifications in range.
The raw material that each embodiment uses meets the following conditions:
Semi-coke foam: Quan Shui < 10%；Volatile matter < 10%；Calorific value > 5700kcal/kg；Sulphur < 0.5%；Partial size is less than
40mm；
Smokeless foam coal: Quan Shui < 5%；Volatile matter < 10%；Calorific value > 4500kcal/kg；Sulphur < 0.5%；Partial size is small
In 40mm.
Embodiment 1
A kind of clean type coal is mainly made of 75 parts of semi-coke foam, 20 parts of smokeless foam coal, 2 parts of adhesive, 9 parts of water, adhesive
Including pre-gelatinized cornstarch and prehydrolysis soil dynamic test, the quality proportioning of pre-gelatinized cornstarch and prehydrolysis soil dynamic test is 1:
2.5。
A kind of preparation method of clean type coal, includes the following steps:
1, it crushes: weighing 75 parts of semi-coke foams, 20 parts of smokeless foam coals, mix, and being ground into partial size is that 2.5mm is below
Material；
2, mixing: weighing 2 parts of binder materials, tentatively mixes, is mixed with smashed semi-coke foam, smokeless foam coal
Material, wherein binder materials are the compositions of cornstarch and soil dynamic test, and the quality proportioning of cornstarch and soil dynamic test is 1:
2.5；
3, it stirring: above-mentioned mixture is stirred, whipping process is divided into three phases, and the first stage: being passed through tap water,
Mixture sufficiently soaks；Second stage: it is passed through the alkali steam containing potassium hydroxide that pH value is 8 and is handled, treatment temperature is
90 DEG C, the processing time is 0.3h, and pre-gelatinized occurs for cornstarch, and prehydrolysis has occurred in the protein in soil dynamic test；Phase III:
It is passed through tap water, material is adhesion-molded；The total water consumption for controlling the tap water in whipping process and the water in alkali steam is 9 parts.
4, the mixture after stirring in 3 compression moulding: is imported into ball press, compression moulding；
5, it dries: the material of compression moulding is dried, drying temperature is 150 DEG C, time 1h；
6, it packs: the moulded coal after drying is packed by the progress of moulded coal packing machine, moulded coal finished product is made, mass parameter is shown in
Table 1.
Table 1
Embodiment 2
A kind of clean type coal is mainly made of 75 parts of semi-coke foam, 25 parts of smokeless foam coal, 2.5 parts of adhesive and 6 parts of water, glues
Mixture is pre-gelatinized cornstarch and prehydrolysis soil dynamic test, and pre-gelatinized cornstarch and the quality proportioning of prehydrolysis soil dynamic test are about
2:1.
A kind of preparation method of clean type coal, includes the following steps:
(1), adhesive is prepared
Cornstarch and soil dynamic test are uniformly mixed according to quality proportioning for 2:1, mixture is obtained；
It uses pH value to pre-process for the 8 alkali steam containing sodium hydroxide to above-mentioned mixture, and is passed through tap water,
Enough moisture is provided for the hydrolysis of protein in the pre-gelatinized and soil dynamic test of starch, and control treatment temperature is 100 DEG C, when processing
Between be 0.5h, obtain the adhesive containing prehydrolysis soil dynamic test and pre-gelatinized starch.
(2), moulded coal is prepared
1, it crushes: weighing 75 parts of semi-coke foams and 25 parts of smokeless foam coals, mix, and being crushed to partial size is less than 3mm's
Material；
2, mixing: weighing the adhesive prepared in 2.5 part 1, tentatively mixes, obtains with smashed semi-coke foam, smokeless foam coal
To mixture.
3, it stirs: above-mentioned mixture being stirred, whipping process is passed through tap water, and mixture sufficiently soaks, and starts to glue
Synthesis type；Originally water consumption is 6 parts in control whipping process；
4, the mixture after stirring in 3 compression moulding: is imported into ball press, compression moulding；
5, it dries: the material of compression moulding is dried, drying temperature is 160 DEG C, time 1.5h；
6, it packs: the moulded coal after drying is packed by the progress of moulded coal packing machine, moulded coal finished product is made, mass parameter is shown in
Table 2.
Table 2
Embodiment 3
Embodiment 3 is except in addition to stirring second stage is passed through the acid vapor containing nitric acid that pH value is 4, remaining operates and implements
Example 1 is all the same.The mass parameter that moulded coal is made in embodiment 3 is shown in Table 3.
Table 3
Embodiment 4
As shown in Figure 1, moulded coal preparation system of the invention, comprising: mixing device enters with first entrance end, second
Mouth end and outlet end；For providing the pretreatment unit of alkali steam or acid vapor, it is connected to the second entrance end of mixing device；
The outlet end of mixing device is arranged in pressure setting 14.
In the present invention, mixing device is used for the mixing of raw material, can additionally be used for the pre- of soil dynamic test and starch simultaneously
Gelatinization and prehydrolysis.The specific structure of mixing device is not limited strictly, as long as can be realized above-mentioned function；Wherein,
First entrance end is for feeding, and second entrance end is for being passed through alkali steam or acid vapor, and outlet end is for discharging.
Specifically, mixing arrangement may include that sequentially connected first rabbling mechanism 8, the second rabbling mechanism 9 and third are stirred
Mechanism 10 is mixed, first entrance end is arranged on the first rabbling mechanism 8, and second entrance end is arranged on the second rabbling mechanism 9, outlet
End is arranged on third rabbling mechanism 10.Setting three-level rabbling mechanism can be such that material is sufficiently mixed and realize soil dynamic test and starch
Abundant pre-gelatinized and prehydrolysis；Wherein, the first rabbling mechanism 8 ensure that filling for semi-coke foam, smokeless foam coal, soil dynamic test and starch
Divide mixing, the second rabbling mechanism 9 realizes the abundant pre-gelatinized of soil dynamic test and starch while mixing and prehydrolysis, third are stirred
Mixing mechanism 10 ensure that being sufficiently mixed for semi-coke foam, smokeless foam coal, prehydrolysis soil dynamic test and pre-gelatinized starch.Above-mentioned three-level stirring
The conventional structure of this field can be used in mechanism.
In the present invention, pretreatment unit is used to provide alkali steam or acid vapor to mixing device, while mixing
Realize the abundant pre-gelatinized and prehydrolysis of soil dynamic test and starch.The specific structure of pretreatment unit is not limited strictly, as long as
It can be realized above-mentioned function, the conventional structure and its combination of this field can be used.
Specifically, pretreatment system may include solution preparation device 11 and steam boiler 12, the entrance of steam boiler 12
End is connected to solution preparation device 11, and the outlet end of steam boiler 12 is connected to second entrance end.Wherein, solution preparation device 11
The acid solution of acid vapor is formed for being formulated for being formed the alkaline solution of alkali steam or preparation, steam boiler 12 is used for alkali
Property solution is thermally formed alkali steam or acid solution is heated into acid vapor.
In the present invention, pressure setting 14 is used to the mixture of raw material being pressed into moulded coal；Pressure setting is not made stringent
Limitation can use the device, such as moulded coal ball press etc. of this field routine.
Further, preparation system of the invention can also include grinding device 3, outlet end by transmitting device 4 with
The first entrance end of mixing device connects.Grinding device 3 is less than for semi-coke foam, smokeless foam coal to be further ground into partial size
3mm, to mix semi-coke foam, smokeless foam coal preferably with adhesive, molding bonded.
Further, preparation system of the invention can also include the drying device 17 that 14 outlet end of pressure setting is arranged in.
Drying device 17 can make the further pre-gelatinized of the starch in adhesive for removing water to pressed moulded coal, mention
High adhesion strength；Drying device 17 is not limited strictly, the conventional equipment of this field, such as mesh-belt type drier can be used
Deng.
Further, preparation system of the invention further includes water system (not shown), and water system has for the
One rabbling mechanism 8 supply water the first water supply line, the second water supply line for supplying water to solution preparation device 11 and be used for
The third water supply line that third rabbling mechanism 10 supplies water.First water supply line is used for semi-coke foam, smokeless foam coal, soil dynamic test and shallow lake
To guarantee that it is sufficiently mixed, the second water supply line is used to provide to solution preparation device 11 for matching for water flowing in the mixed material of powder
The water of alkaline solution processed or for providing the water for preparing acid solution to acid solution device for formulating, third water supply line be used for
Semi-coke foam, smokeless foam coal, prehydrolysis soil dynamic test and pre-gelatinized starch mixed material in water flowing to guarantee that it is sufficiently mixed.
In particular, being respectively arranged with flowmeter (not on the first water supply line, the second water supply line and third water supply line
Diagram).The dosage for the water that flowmeter is used to provide each water supply line controls, so that total water consumption control is in default model
It encloses.
In addition, preparation system of the invention can also include other devices, such as proportioner 1, Storage appts. 5, feed
Device 6, transmitting device etc. can be used the conventional structure of this field, and can be set in a manner of the conventional arrangement of this field
It sets.
Specifically, preparation system can also include proportioner 1, and the outlet end of proportioner 1 passes through transmitting device 2 and powder
The arrival end of crushing device 3 connects.Proportioner 1 is used to prepare each raw material according to parts by weight, and the conventional structure of this field can be used.
Above-mentioned preparation system can also include the Storage appts. 5 being arranged between grinding device 3 and mixing device, outlet
End is connect by transmitting device 7 with the first entrance end of mixing device.Storage appts. 5 guarantees that it is uniformly defeated for storing material
It send into mixing device, the conventional structure of this field can be used.
Above-mentioned preparation system can also include the charging gear 6 that mixing device first entrance end is arranged in.Charging gear 6 is used
In quantitatively conveying starch and soil dynamic test by weight, to be mixed with the realization of other raw materials.
In addition, above-mentioned preparation system can also include fume extractor 16；It is to be appreciated that drying device 17 goes out with flue gas
Mouthful, fume extractor 16 is connect with the exhanst gas outlet of drying device 17.
The step of preparing moulded coal using above-mentioned preparation system is as follows:
1, ingredient: 75 parts of semi-coke foams, 20 parts of smokeless foam coals are weighed, by proportioner 1 to realize ingredient；
2, crush: material enters grinding device 3 by transmitting device 2 in 1, is ground into the material that partial size is less than 3mm；
3, bin stock: the material in grinding device 3 enters 5 bin stock of Storage appts. by transmitting device 4；
4, be fed: with 2.5 parts of binder materials, including mass ratio be 1:2.5 cornstarch and soil dynamic test, be passed through to
Expect in device 6, and be added in transmitting device 7 by amount, until addition finishes；
5, alkali steam: pH value is added in solution preparation device 11 and is 9 sodium hydroxide solution, and is passed into steam boiler
12 are heated, and alkali steam is generated；
6, stir: the material approach transmitting device 7 in Storage appts. 5 is mixed with adhesive, into three-level rabbling mechanism,
Uniform stirring, wherein the first rabbling mechanism 8: being passed through tap water, soaks material and adhesive sufficiently；Second rabbling mechanism 9:
It is passed through the alkali steam of 5 preparations, treatment temperature is 90 DEG C, time 0.3h, makes starch pre-gelatinized in adhesive, albumen in soil dynamic test
Matter prehydrolysis；Third rabbling mechanism 10: being passed through tap water, and material is adhesion-molded；Control whipping process tap water and alkali steam
Dosage is 9 parts；
7, compression moulding: the material in third rabbling mechanism 10 is passed through in pressure setting 14 by transmitting device 13, is suppressed
Shaped coal semi-finished product；
8, dry: the material in pressure setting 14 enters drying device 17 by transmitting device 15, and dry, drying temperature is
It 160 DEG C, drying time 1.5h, neutralizes the connected fume extractor 16 of drying device 17 and excludes the flue gas that drying process generates；
9, packed: the moulded coal after drying is packed by the progress of moulded coal packing machine, moulded coal finished product is made, mass parameter is shown in
Table 4.
Table 4
Reference examples 1
For this reference examples moulded coal other than adhesive only includes pre-gelatinized cornstarch, other steps and embodiment 1 are homogeneous
Together, specific the preparation method is as follows:
1, it crushes: weighing 75 parts of semi-coke foams, 20 parts of smokeless foam coals, mix, and being ground into partial size is that 2.5mm is below
Material；
2, mixing: weighing 2 parts of binder materials, tentatively mixes, is mixed with smashed semi-coke foam, smokeless foam coal
Material, wherein binder materials are cornstarch；
3, it stirring: above-mentioned mixture is stirred, whipping process is divided into three phases, and the first stage: being passed through tap water,
Material sufficiently soaks；Second stage: being passed through water vapour, and pre-gelatinized occurs for cornstarch, and treatment temperature is 90 DEG C, and the processing time is
0.3h；Phase III: being passed through tap water, and material is adhesion-molded；Originally total dosage of water and steam is 9 in control whipping process
Part.
4, the mixture after stirring in 3 compression moulding: is imported into ball press, compression moulding；
5, it dries: the material of compression moulding is dried, drying temperature is 150 DEG C, time 1h；
6, it packs: the moulded coal after drying is packed by the progress of moulded coal packing machine, moulded coal finished product is made, mass parameter is shown in
Table 5.
Table 5
Reference examples 2
In addition to stirring second stage is using steam treatment, remaining operation and embodiment 1 are all the same.Type is made in reference examples 2
The mass parameter of coal is shown in Table 6.
Table 6
According to table 1-6 it is found that the moulded coal of embodiment 1-4 preparation, intensity are greater than 800N, efficiency of combustion is greater than 90%, items
Parameter attribute is superior to reference examples 1-2, especially the moulded coal for preparing of embodiment 2, intensity 964N, efficiency of combustion 95%,
The intensity and efficiency of combustion of moulded coal are substantially increased in prior art basis.The briquette strength of reference examples 1 is not so good as embodiment 1-4,
Its reason may is that adhesive only includes common corn starch, and bonding effect is general, not as good as adhesive in embodiment 1-4
Bonding effect it is good.The briquette strength of reference examples 2 is not so good as embodiment 1-4, and reason may is that, soil dynamic test is only in reference examples 2
By steam treatment, protein therein fails to hydrolyze, and only a small amount of pre-gelatinized starch can play adhesive effect, therefore bonds strong
Degree is general, cannot effectively facilitate the molding of material and the raising of briquette strength.
It is indicated above that coal briquette bond of the present invention, adhesive strength is high, and low in cost, universality is strong, can effectively promote
Into the molding of moulded coal and its raising of intensity, there is important application value in clean coal production technical field；It is of the present invention
Combustion of Mould Coal efficiency significantly improves, and greatly reduces energy waste, and briquette strength is high, has good thermal stability, can expire
The civilian demand of foot；The preparation method of moulded coal of the present invention, concise in technology is time-consuming shorter, and it is discarded to realize industrial production
The efficient utilization of object-soil dynamic test, improves the fuel availability of semi-coke foam, has in clean coal production technical field potential
Application prospect.
Claims (10)
1. a kind of moulded coal, which is characterized in that be mainly made of the raw material of following parts by weight: 70~80 parts of semi-coke foam, smokeless foam coal
20~30 parts, 2~3 parts of adhesive and 6~10 parts of water；
Described adhesive includes prehydrolysis soil dynamic test and pre-gelatinized starch, and the quality of prehydrolysis soil dynamic test and pre-gelatinized starch is matched
Than for (0.5-1.5): (1.5-2.5), preferably 1:2.
2. a kind of moulded coal according to claim 1, which is characterized in that the prehydrolysis soil dynamic test and pre-gelatinized starch are logical
Cross what alkali steam or acid vapor handled soil dynamic test and starch；
Preferably, the pH value of the alkali steam is 8-9；
Preferably, the pH value of the acid vapor is 4-6；
Preferably, the temperature of the processing is 60-100 DEG C, time 0.1-0.5h；
Preferably, the alkaline matter in the alkali steam includes at least one of sodium hydroxide and potassium hydroxide；
Preferably, the acidic materials in the acid vapor include at least one of hydrochloric acid, sulfuric acid and nitric acid；
Preferably, the starch is selected from least one of cornstarch, tapioca and wheaten starch, and more preferably corn forms sediment
Powder；
Preferably, the quality proportioning of soil dynamic test and starch is (0.5-1.5): (1.5-2.5).
3. a kind of moulded coal according to claim 1, which is characterized in that the full water < 6% of the moulded coal；Volatile matter <
12%；Calorific value > 5700kcal/kg；Cold pressing strength > 600N；Sulphur < 0.5%.
4. a kind of moulded coal according to claim 1, which is characterized in that the partial size of the semi-coke foam is less than 40mm, Quan Shui <
10%, volatile matter < 10%, calorific value > 5700kcal/kg, sulphur < 0.5%；
Preferably, the partial size of the smokeless foam coal is less than 40mm, Quan Shui < 5%, volatile matter < 10%, calorific value >
4500kcal/kg, sulphur < 0.5%.
5. a kind of preparation method of any moulded coal of claim 1-4 characterized by comprising
Semi-coke foam, smokeless foam coal, soil dynamic test and starch and water are mixed, in mixed process, using alkali steam or acid vapor pair
Mixed material is handled, and is then suppressed, is obtained the moulded coal；
Preferably, the mixing includes the first order mixing, second level mixing and third level mixing successively carried out, and the processing exists
It is carried out in the mixed process of the second level.
6. a kind of preparation method of any moulded coal of claim 1-4 characterized by comprising
Soil dynamic test and starch are handled using alkali steam or acid vapor, obtain described adhesive；
Semi-coke foam, smokeless foam coal, adhesive and water are mixed by weight, then suppresses, obtains the moulded coal.
7. a kind of preparation method of moulded coal according to claim 5 or 6, which is characterized in that before mixing further include: will
Semi-coke foam and smokeless foam coal dust are broken to partial size less than 3mm；
It preferably, after pressing further include drying steps, so that the full water < 6% of the moulded coal；
Preferably, the drying mode is drying；
Preferably, the drying temperature is 140 DEG C~160 DEG C；
Preferably, the drying time is 1h~1.5h.
8. a kind of moulded coal preparation system characterized by comprising
Mixing device, with first entrance end, second entrance end and outlet end；
For providing the pretreatment unit of alkali steam or acid vapor, it is connected to the second entrance end of the mixing device；
The outlet end of the mixing device is arranged in pressure setting.
9. a kind of moulded coal preparation system according to claim 8, which is characterized in that the preparation system further includes crushing dress
It sets, outlet end is connect by transmitting device with the first entrance end of the mixing device；
Preferably, the preparation system further includes proportioner, the outlet end of the proportioner by transmitting device with it is described
The arrival end of grinding device connects；
Preferably, the preparation system further includes the Storage appts. being arranged between the grinding device and the mixing device,
Its outlet end is connect by transmitting device with the first entrance end of the mixing device；
Preferably, the preparation system further includes the charging gear that mixing device first entrance end is arranged in；
Preferably, the preparation system further includes the drying device that the pressure setting outlet end is arranged in；
Preferably, the preparation system further includes fume extractor, the drying device have exhanst gas outlet, the fume extractor with
The exhanst gas outlet of the drying device connects.
10. a kind of moulded coal preparation system according to claim 8, which is characterized in that the mixing arrangement includes successively connecting
The first rabbling mechanism, the second rabbling mechanism and the third rabbling mechanism connect, the first entrance end are arranged in the first rabbling mechanism
On, the second entrance end is arranged on the second rabbling mechanism, and the outlet end is arranged on third rabbling mechanism；
Preferably, the pretreatment system includes solution preparation device and steam boiler, the arrival end of the steam boiler and institute
Solution preparation device connection is stated, the outlet end of the steam boiler is connected to the second entrance end；
Preferably, the preparation system further includes water system, and the water system has for supplying water to the first rabbling mechanism
The first water supply line, the second water supply line for supplying water to solution preparation device and for supplying water to third rabbling mechanism
Third water supply line；
Preferably, flowmeter is respectively arranged on first water supply line, the second water supply line and third water supply line.
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| CN111979008A (en) * | 2020-08-28 | 2020-11-24 | 湖州民强炭业有限公司 | Method for improving calorific value of machine-made charcoal |
| CN112725050A (en) * | 2020-12-09 | 2021-04-30 | 陕西北元化工集团股份有限公司 | Preparation method of semi-coke pellets |
| CN112831360A (en) * | 2020-12-31 | 2021-05-25 | 兖矿科技有限公司 | Modified clean coal and preparation method and application thereof |
| CN113913221A (en) * | 2021-11-10 | 2022-01-11 | 优煤易购供应链管理股份有限公司 | Anthracite particle briquette |
| JP7415964B2 (en) | 2021-01-21 | 2024-01-17 | Ｊｆｅスチール株式会社 | How to make briquettes |
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Application publication date: 20190416 |