CN114000370A - Method for treating sulfate pulping black liquor by using black liquor water-coal-slurry prepared from weak black liquor - Google Patents
Method for treating sulfate pulping black liquor by using black liquor water-coal-slurry prepared from weak black liquor Download PDFInfo
- Publication number
- CN114000370A CN114000370A CN202111245040.9A CN202111245040A CN114000370A CN 114000370 A CN114000370 A CN 114000370A CN 202111245040 A CN202111245040 A CN 202111245040A CN 114000370 A CN114000370 A CN 114000370A
- Authority
- CN
- China
- Prior art keywords
- black liquor
- coal
- water slurry
- additive
- coal water
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 title claims abstract description 17
- 238000004537 pulping Methods 0.000 title claims abstract description 17
- 239000003250 coal slurry Substances 0.000 title description 5
- 239000003245 coal Substances 0.000 claims abstract description 102
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000002002 slurry Substances 0.000 claims abstract description 41
- 239000000654 additive Substances 0.000 claims abstract description 39
- 239000000843 powder Substances 0.000 claims abstract description 33
- 230000000996 additive effect Effects 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 8
- 238000002485 combustion reaction Methods 0.000 claims description 23
- 238000011084 recovery Methods 0.000 claims description 12
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 9
- 239000003381 stabilizer Substances 0.000 claims description 9
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 8
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical group [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 8
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 8
- 229910052708 sodium Inorganic materials 0.000 claims description 8
- 239000011734 sodium Substances 0.000 claims description 8
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 8
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000005416 organic matter Substances 0.000 abstract 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 12
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 238000003756 stirring Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000002817 coal dust Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229920005610 lignin Polymers 0.000 description 3
- 229920000417 polynaphthalene Polymers 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye
-
- 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
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
-
- 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
- C10L5/08—Methods of shaping, e.g. pelletizing or briquetting without the aid of extraneous binders
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0085—Introduction of auxiliary substances into the regenerating system in order to improve the performance of certain steps of the latter, the presence of these substances being confined to the regeneration cycle
Abstract
The invention relates to a method for treating sulfate pulping black liquor by using thin black liquor prepared black liquor coal water slurry, which is characterized in that the thin black liquor generated by a paper mill is used as a main raw material to prepare black liquor coal water slurry, the sulfate method papermaking black liquor is treated by a coal water slurry process for eliminating high-load organic matter pollution in the black liquor by burning the black liquor coal water slurry, coal powder and an additive are mixed and then mixed with the papermaking black liquor with the solid content of 10-20% generated by sulfate method pulping, the mixing ratio (mass ratio) is 1:0.6-1:1.7 to prepare the coal water slurry, the black liquor coal water slurry is burned to eliminate the high-load organic matter pollution of the papermaking wastewater, and the method has the characteristics of small investment, strong economic practicability, safe use, energy conservation and emission reduction, simple and easy operation and the like, and can be popularized to sulfate method papermaking enterprises.
Description
Technical Field
The invention belongs to the field of wastewater treatment and energy consumption optimization in the paper making industry, and particularly relates to a method for treating sulfate pulping black liquor by using black liquor water coal slurry prepared from weak black liquor.
Background
The paper making industry is one of the important traditional industries in China, and has the characteristics of large demand of chemical raw materials, high energy consumption, large water consumption, serious pollution and the like. In recent years, under the encouragement of policies, the pulp mill in China is continuously developed to the large and medium-sized conditions of high speed, high efficiency, high quality, low consumption, continuous production, automation, coordinated environment and a circulating economy road, and is developed towards the emerging and modern large industry. The Black Liquor (Black Liquor) is Black waste Liquor generated in the pulping process of the paper industry, the organic pollution load of the Black Liquor accounts for more than 90% of the pollution load of all paper-making waste water, and the Black Liquor is one of the main environmental pollution sources in China. The papermaking black liquor is also a resource which can be recycled. Alkali lignin, hydroxyl low molecular weight organic acid, sodium salt and the like in the black liquor have surface activity functions, so that the black liquor can be directly used for replacing water and a dispersing agent to prepare the coal water slurry which is used as fuel for a boiler, a kiln or a gasification furnace.
Coal Water Slurry (CWS) is a coal-substituted oil fuel which is developed due to the oil crisis at the end of the 70 s in the 20 th century and is obtained by a physical processing method by 60-70% of coal, 30-40% of water and a small amount of additives. The coal water slurry has the advantages of low pollution, high combustion efficiency, pipeline transportation and the like, and is an important component of the coal clean processing and utilizing technology. After more than 30 years of development, the coal water slurry technology is mature and widely applied to various fields such as industrial boiler combustion, coal chemical industry conversion and the like. With the development of the times, the adoption of clear water for pulping is gradually not suitable for the requirements of the modern society on the environment and resources. The development of the wastewater pulping technology not only can realize the reclamation, reduction and harmlessness of the wastewater with low cost, but also has practical significance for protecting the water resource environment.
With the advancement of technology, more and more wastewater is produced into coal water slurry. The black liquor as the waste water of paper making industry has high alkalinity, is beneficial to the combustion of fuel and sulfur fixation, and has combustion advantage compared with coal water slurry with the same concentration. However, the preparation of the black liquor coal water slurry mainly comprises two modes of preparing concentrated black liquor and preparing black liquor as an additive, wherein the former mode consumes too much energy, and the latter mode uses a very limited amount of black liquor. The dilute black liquor generated in the papermaking process is directly utilized to prepare the coal water slurry, so that the energy consumption can be saved, and a large amount of black liquor is used.
Disclosure of Invention
The invention aims to improve the traditional premise of alkali recovery energy consumption, increase the high-efficiency utilization of substances in black liquor, fully utilize the dispersion performance of lignin and the stability of other small molecules in the black liquor on the premise of utilizing the biomass heat energy in the black liquor, and provide a method for preparing black liquor coal water slurry by using dilute black liquor to treat sulfate pulping black liquor, which can solve the problems of high sodium ion content, low ash melting point and ash fusion slag during combustion in the sulfate papermaking black liquor. The novel black liquor coal water slurry is prepared by using the weak black liquor generated in the pulping process of the sulfate method, and on the premise that the novel black liquor coal water slurry achieves the efficient utilization of lignin and other micromolecule performances in the black liquor, the pollution of high-load organic matters in the black liquor is eliminated through the combustion action, so that the aim of treating the high pollution of the sulfate papermaking black liquor is achieved.
In order to achieve the purpose, the invention adopts the following technical means:
the method for treating black liquor produced by pulping by sulfate includes such steps as crushing raw coal, sieving, adding additive (1 wt.%) to powdered coal, mixing, preparing water-coal slurry from powdered coal containing additive and black liquor (1: 0.6-1: 1.7), and burning to eliminate black liquor.
The raw coal crushing and screening is to crush the raw coal by a ball mill, and screen the crushed coal powder by a screen of 40 meshes to obtain the coal powder.
The additive comprises a stabilizer and a dispersant.
The stabilizer is sodium carboxymethyl cellulose.
The dispersant is sodium polynaphthalenesulfonate.
The mass ratio of the stabilizer to the dispersant in the additive is 2: 3.
The raw coal is coal with ash content of 7-15%, volatile component of 10-40% and calorific value of 24-35 MJ/Kg.
The black liquor is paper-making black liquor with solid content of 10-20% and mass concentration.
The combustion is carried out in a soda recovery furnace.
The invention achieves the following beneficial effects:
the invention saves the process of evaporating and concentrating the dilute black liquor into the concentrated black liquor in the traditional pulping process, saves the energy consumption and the equipment investment in the evaporation process, and simultaneously achieves the aim of thoroughly treating the pollution of the sulfate papermaking black liquor. The black liquid coal water slurry is used for burning the alkali recovery boiler, the burning effect is obvious, and the load of the thermal power station is reduced. Compared with the similar technology in China, the black liquid coal water slurry technology takes the dilute black liquid generated in the paper making process as the raw material to directly prepare the black liquid coal water slurry without concentration, and can use a large amount of the dilute black liquid instead of taking the black liquid as a part of the additive to prepare, and meanwhile, the investment of the black liquid coal water slurry combustion technology saves the evaporation concentration process.
Compared with the common water coal slurry preparation technology: the black liquor of the dilute black liquor coal water slurry is taken from the dilute black liquor produced by a paper mill and is directly put into use, so that a large amount of water resources and chemical additives are saved, the dilute black liquor is used in a large amount, the black liquor with high-load organic pollution is changed into useful resources, the heat value and substances with surface activity functions in organic matters in the black liquor are recycled, and the aim of treating black liquor pollution is fulfilled. The invention fully utilizes the heat value in the black liquor, reduces the coal load of the thermal power station, improves the heat efficiency of the alkali recovery furnace, saves a large amount of engineering investment, eliminates the pollution of the black liquor to the water quality of a discharged water source, and simultaneously reduces SO2And the discharge amount of NOx, CO and solid waste, and reduces the environmental protection investment and the cost of operating equipment.
The black liquor coal water slurry prepared by the method can be proportioned in different concentrations according to the concentration of solid matters in the black liquor, the black liquor accounting for 50-100% of the pollution load of a machine in the paper making industry is eliminated, and the organic pollution load of wastewater generated in each working section is reduced to the greatest extentLoad and can reduce SO in flue gas in the combustion process of alkali recovery furnace2NOx, CO and small solid particle emissions.
Drawings
FIG. 1 is a flow chart of the preparation of the present invention.
Figure 2 is the black liquor composition of different pulping processes.
Detailed Description
The invention is described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting.
As shown in figure 1, raw coal is crushed by a ball mill, the crushed coal powder is screened by a 40-mesh screen, the screened coal powder is fully mixed with an additive, and then the coal powder added with the additive is mixed with black liquor by a stirring method to prepare black liquor coal water slurry. The black liquor coal water slurry is sent to a BLWS storage tank for storage, and finally sent to an alkali recovery furnace for combustion.
It should be especially noted that if the coal water slurry is prepared by adopting the black liquor only through simple preparation, the combustion effect of the coal water slurry is poor, the consumed black liquor quantity is limited, meanwhile, slag is formed on the hearth and the flue wall of the subsequent alkali recovery furnace, the normal operation of the boiler can be influenced, and coal blending is needed during combustion, so that the coal water slurry cannot be combusted independently.
Referring to fig. 2, according to the characteristics that the metal ion content (mainly sodium ions) in the sulfate process papermaking black liquor is high, the combustion point of the prepared slurry is low, the ash melting point of the black liquor is low during combustion, and slag is easy to form on the hearth and flue wall of the alkali recovery furnace, so that the normal operation of a boiler is influenced, the coal type selection for preparing the black liquor coal water slurry needs to be carried out, the coal type suitable for preparing the black liquor coal water slurry is screened out, so that the stable black liquor coal water slurry is prepared, and the slag scaling phenomenon in combustion is solved to the greatest extent. Through screening, the raw coal with the ash content of 7% -15%, the volatile matter of 10% -40% and the calorific value of 24-35MJ/Kg can well solve the phenomena of slagging and scaling. The dilute black liquor used in the invention is from pulping black liquor of Guangxi Hongtai paper pulp GmbH, and the Guangxi Hongtai GmbH adopts a sulfate pulping process.
Example 1
Preparing coal powder: raw coal with the heat value of 24.03MJ/kg, the ash content of 15 percent and the volatile component of 40 percent is taken and crushed by a ball mill, and the crushed coal powder is screened by a screen of 40 meshes to obtain the coal powder.
Preparing an additive: the stabilizer is sodium carboxymethylcellulose, the dispersant is sodium polynaphthalene formaldehyde sulfonate according to the weight ratio of sodium carboxymethylcellulose: the sodium polynaphthalenesulfonate was added at a ratio of 2:3 and then stirred well.
Adding additives to the coal dust: the additive is added according to 1 percent of the mass of the coal powder, and the coal powder and the additive are fully mixed while stirring.
Mixing the coal powder added with the additive with black liquor: adding the coal powder added with the additive into black liquor for stirring, wherein the solid content of the black liquor is as follows: 10% of coal powder added with additives: the mixing proportion of the black liquor is as follows: 1:0.6.
And (3) combustion: the prepared black liquid coal water slurry is sent into a soda recovery furnace to be directly used for combustion without coal blending. The low-level heating value of the black liquid coal water slurry prepared according to the proportion is 15.41 MJ/Kg.
Example 2
Preparing coal powder: raw coal with the heat value of 26.67MJ/Kg, the ash content of 8.25% and the volatile component of 27.68% is taken and crushed by a ball mill, and the crushed coal powder is screened by a screen of 40 meshes to obtain the coal powder.
Preparing an additive: the stabilizer is sodium carboxymethylcellulose, the dispersant is sodium polynaphthalene formaldehyde sulfonate according to the weight ratio of sodium carboxymethylcellulose: the sodium polynaphthalenesulfonate was added at a ratio of 2:3 and then stirred well.
Adding additives to the coal dust: the additive is added according to 1 percent of the mass of the coal powder, and the coal powder and the additive are fully mixed while stirring.
Mixing the coal powder added with the additive with black liquor: adding the coal powder added with the additive into black liquor for stirring, wherein the solid content of the black liquor is as follows: 12%, coal powder added with additives: the mixing proportion of the black liquor is as follows: 1:1.2.
And (3) combustion: the prepared black liquid coal water slurry is sent into a soda recovery furnace to be directly used for combustion without coal blending. The low-level heating value of the black liquor coal water slurry prepared according to the proportion is 16.84 MJ/Kg.
Example 3
Preparing coal powder: raw coal with the heat value of 35MJ/Kg, the ash content of 7% and the volatile component of 10% is taken, a ball mill is adopted for crushing, and crushed coal powder is screened by a screen of 40 meshes to obtain the coal powder.
Preparing an additive: the stabilizer is sodium carboxymethylcellulose, the dispersant is sodium polynaphthalene formaldehyde sulfonate according to the weight ratio of sodium carboxymethylcellulose: the sodium polynaphthalenesulfonate was added at a ratio of 2:3 and then stirred well.
Adding additives to the coal dust: the additive is added according to 1 percent of the mass of the coal powder, and the coal powder and the additive are fully mixed while stirring.
Mixing the coal powder added with the additive with black liquor: adding the coal powder added with the additive into black liquor for stirring, wherein the solid content of the black liquor is as follows: 20%, coal powder added with additives: the mixing proportion of the black liquor is as follows: 1:1.7.
And (3) combustion: the prepared black liquid coal water slurry is sent into a soda recovery furnace to be directly used for combustion without coal blending. The low-level heating value of the black liquid coal water slurry prepared according to the proportion is 18.05 MJ/Kg.
It should be noted that if the additive is added into the black liquor first and then mixed and stirred with the coal powder, the mixing is more sufficient theoretically, but the effect of adding the additive into the black liquor first becomes worse, the form of the black liquor coal water slurry is affected, and the subsequent combustion is affected.
Claims (9)
1. The method for treating the sulfate pulping black liquor is characterized by comprising the steps of crushing and screening raw coal, adding an additive into coal powder, fully mixing, and mixing the coal powder containing the additive and the dilute black liquor according to the mass ratio of 1:0.6-1:1.7 to prepare black liquor coal water slurry; the weak black liquor is a papermaking black liquor of a sulfate pulping process with the solid content of 10-20%.
2. The treatment method according to claim 1, wherein the raw coal crushing and screening is to crush raw coal by a ball mill, and screen pulverized coal by a 40-mesh screen to obtain pulverized coal.
3. The process of claim 1 wherein said additives comprise stabilizers and dispersants.
4. The process of claim 3, wherein the stabilizer is sodium carboxymethylcellulose.
5. The process of claim 3 wherein the dispersant is sodium polynaphthalenesulfonate.
6. The process of claim 3, wherein the mass ratio of the stabilizer to the dispersant in the additive is 2: 3.
7. The process as claimed in claim 3, wherein the raw coal is coal having ash content of 7-15%, volatile matter of 10-40%, and calorific value of 24-35 MJ/Kg.
8. The process according to claim 1, characterized in that the additive is added in an amount of 1% by mass of the coal fines.
9. The black liquor coal-water slurry obtained by the treatment method of any one of claims 1 to 8 is used for combustion of an alkali recovery boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111245040.9A CN114000370A (en) | 2021-10-26 | 2021-10-26 | Method for treating sulfate pulping black liquor by using black liquor water-coal-slurry prepared from weak black liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111245040.9A CN114000370A (en) | 2021-10-26 | 2021-10-26 | Method for treating sulfate pulping black liquor by using black liquor water-coal-slurry prepared from weak black liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114000370A true CN114000370A (en) | 2022-02-01 |
Family
ID=79924056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111245040.9A Pending CN114000370A (en) | 2021-10-26 | 2021-10-26 | Method for treating sulfate pulping black liquor by using black liquor water-coal-slurry prepared from weak black liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114000370A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114634828A (en) * | 2022-04-28 | 2022-06-17 | 广西大学 | Gasification system for preparing gasified gas by using black liquid coal water slurry and gasification process thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313426A (en) * | 2000-12-19 | 2001-09-19 | 河南中原环保工程有限公司 | Process for treatinb black liquid of cotton pulse by means of water-coal slurry |
| CN1354228A (en) * | 2001-12-18 | 2002-06-19 | 朱复东 | New-type fuel powder paste coal |
| CN1405493A (en) * | 2000-12-19 | 2003-03-26 | 河南中原环保工程有限公司 | Treatment of papermaking black liquor of sulphite by water coal fluid process |
| CN101322927A (en) * | 2008-07-29 | 2008-12-17 | 华南理工大学 | Coal water slurry dispersing agent made from black-liquor of straw pulping in paper-making and preparation thereof |
| CN202265556U (en) * | 2011-09-15 | 2012-06-06 | 济南联星石油化工有限公司 | Device for preparing coal water slurry by paper-making black liquor |
| CN112301781A (en) * | 2020-10-14 | 2021-02-02 | 福建省青山纸业股份有限公司 | Method for performing mixed combustion by adding coal water slurry into concentrated black liquor in alkali recovery furnace |
-
2021
- 2021-10-26 CN CN202111245040.9A patent/CN114000370A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313426A (en) * | 2000-12-19 | 2001-09-19 | 河南中原环保工程有限公司 | Process for treatinb black liquid of cotton pulse by means of water-coal slurry |
| CN1405493A (en) * | 2000-12-19 | 2003-03-26 | 河南中原环保工程有限公司 | Treatment of papermaking black liquor of sulphite by water coal fluid process |
| CN1354228A (en) * | 2001-12-18 | 2002-06-19 | 朱复东 | New-type fuel powder paste coal |
| CN101322927A (en) * | 2008-07-29 | 2008-12-17 | 华南理工大学 | Coal water slurry dispersing agent made from black-liquor of straw pulping in paper-making and preparation thereof |
| CN202265556U (en) * | 2011-09-15 | 2012-06-06 | 济南联星石油化工有限公司 | Device for preparing coal water slurry by paper-making black liquor |
| CN112301781A (en) * | 2020-10-14 | 2021-02-02 | 福建省青山纸业股份有限公司 | Method for performing mixed combustion by adding coal water slurry into concentrated black liquor in alkali recovery furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114634828A (en) * | 2022-04-28 | 2022-06-17 | 广西大学 | Gasification system for preparing gasified gas by using black liquid coal water slurry and gasification process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101225334A (en) | Water coal coke slurry and preparation technology thereof | |
| CN1908134A (en) | High concentration sludge coal slurry and method for preparing the same | |
| CN103497791B (en) | A kind of Novel sludge coal-water slurry and preparation method thereof | |
| CN101457165B (en) | Coal water slurry made by combining lincomycin wet bacteria slag and coal | |
| CN101054541B (en) | Sludge petroleum charred slurry and preparing process and application thereof | |
| CN114000370A (en) | Method for treating sulfate pulping black liquor by using black liquor water-coal-slurry prepared from weak black liquor | |
| CN101787312B (en) | Biochar pulp prepared from garbage leachate serving as raw material and preparation process thereof | |
| CN102732345A (en) | Sludge coal-water slurry and preparation method thereof | |
| CN102269418B (en) | Method for utilizing papermaking sludge to realize desulfuration, denitrification and coal conservation of circulating fluid bed | |
| CN114350420A (en) | Preparation method and application of low-cost coal slime-based coal water slurry | |
| CN100580317C (en) | City sludge reclamation processing and utilization method | |
| CN1558143A (en) | Method for dealing with discharge liquid from paper, leather and dye printing industry using circulating fluidized combustion method | |
| CN107227183A (en) | A kind of high heating value water-coal-slurry | |
| CN1210093A (en) | Closed circulation treatment of waste water and gases in papermaking plants | |
| CN1152827C (en) | Process for treating waste mother liquid of H acid in dye factory | |
| CN110643402A (en) | Method for preparing sludge coal water slurry through sludge viscosity reduction treatment | |
| CN108841423B (en) | Method for preparing coal water slurry by using various coal conversion wastewater | |
| Zhao et al. | Papermaking waste water resource recovery-a new approach of preparation of coal water slurry | |
| CN100354396C (en) | Coal-firing efficient additive for dry cement process and its use | |
| CN1405493A (en) | Treatment of papermaking black liquor of sulphite by water coal fluid process | |
| CN115772432B (en) | Low-rank coal modification method, injection coal and coal blending system | |
| Li | Application and Development Prospect of CWS Technology | |
| CN101880557B (en) | Pulping method for preparing high-concentration water coal slurry by utilizing waste alkali liquor during refining of petroleum products | |
| CN112852511A (en) | Composite slurry fuel and preparation method thereof | |
| CN211159563U (en) | System for preparing coal water slurry by viscosity reduction treatment of sludge |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220201 |