CN104388137B - A kind of municipal sludge prepares the method for high concentration sludge coal slurry - Google Patents
A kind of municipal sludge prepares the method for high concentration sludge coal slurry Download PDFInfo
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- CN104388137B CN104388137B CN201410758151.3A CN201410758151A CN104388137B CN 104388137 B CN104388137 B CN 104388137B CN 201410758151 A CN201410758151 A CN 201410758151A CN 104388137 B CN104388137 B CN 104388137B
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Abstract
The invention discloses a kind of method that municipal sludge prepares high concentration sludge coal slurry.The method comprises following process: first, and employing charcoal is that the sludge conditioner of main raw material carries out modified to the primary sludge do not dewatered in municipal sewage plant; Then, modified rear mud is left standstill and within 20 ~ 60 minutes, carries out gravity concentration dehydration, discharge supernatant liquor, obtain thickened sludge; Finally, mixed by a certain percentage by thickened sludge with coal, additive, and thickened sludge dry weight accounts for 10 ~ 18% of sludge coal slurry solid content, ball milling, make the particle diameter of solid particulate be less than 0.1mm, the particle diameter of wherein≤75 μm accounts for 70-80%, obtained high concentration sludge coal slurry.The present invention's thickened sludge directly mixes sludge coal slurry processed with coal, does not need to carry out drying in advance to mud, and both simplified the preparation technology of sludge coal slurry, and reduced costs, realize again recycling sludge and utilize, protection of the environment, has good economic benefit and market outlook.
Description
Technical field
The invention belongs to urban domestic sewage sludge application technology as the second resource field, relate to a kind of method that municipal sludge prepares high concentration sludge coal slurry.
Background technology
Coal water slurry is under the impact of the oil crisis of 20 century 70s, and a kind of of rise can the clean fuel of replacing oil combustion.Utilize relative to the directly burning of coal, coal water slurry has the benefits such as energy-saving and environmental protection.
Along with the in-depth of the high speed development of world economy and the raising of wastewater treatment rate and degree for the treatment of, the output of municipal sludge grows with each passing day.If municipal sludge can not get appropriate process, serious secondary pollution will be caused.Therefore, the reasonable process of municipal sludge and recycling have become one of current environmental problem the most thorny.
In order to seek the new way that city sewage sludge reclamation utilizes, Chinese scholars has carried out systematic research to the characteristic of municipal sludge, obtain following common recognition: (1) municipal sludge has the large feature of water content, undressed municipal sludge water ratio is about 98%, and the municipal sludge water ratio after mechanical dehydration can be down to about 80%.(2) municipal sludge is rich in organic substance, thus has calorific value, and butt municipal sludge calorific value is about 10 ~ 20MJ/kg, is almost more than 1/3 of coal calorific value.(3) municipal sludge also has the Bio-surface active of preparation required for coal water slurry (being mainly derived from the extracellular polymeric (ExtracellularPolymericsubstances is called for short EPS) produced in microbial life metabolic process in municipal sludge).(4) mud as during energy utilization and coal in many aspects there is similarity, be the complicated and solid altered a great deal with room and time of composition containing can material.But with regard to mud itself, be a kind of high-moisture, low-calorie inferior fuel, burning can not reach desirable effect separately.
Based on municipal sludge be rich in organic matter, moisture high, have calorific value, there is surface-active feature, municipal sludge can replace water in coal water slurry preparation process and part coal, and municipal sludge is become sludge coal slurry with coal mixture.The preparation method of existing sludge coal slurry prepares sludge coal slurry by allocating in coal after municipal sludge drying, and the municipal sludge dry energy not only needing consumption a large amount of in advance, also can produce dust and obnoxious flavour, when causing municipal sludge to prepare clean fuel, cost is high, energy consumption is high, produce serious secondary pollution problems, therefore, the case of municipal sludge coal slurry industrialization is not also had so far.
Summary of the invention
The object of this invention is to provide a kind of method that municipal sludge prepares high concentration sludge coal slurry, solve that the mud allocation ratio existed in existing sludge coal slurry preparation process is low, energy consumption is high, cost is high, produce the technical barriers such as serious secondary pollution, realize the industrialization of sludge coal slurry.
The technical scheme that the present invention realizes above-mentioned purpose is:
Municipal sludge prepares a method for high concentration sludge coal slurry, comprises the steps:
(1) sludge conditioner is adopted to carry out modified to primary sludge;
(2) within 20 ~ 60 minutes, carry out gravity concentration dehydration by standing for modified rear mud, discharge supernatant liquor (COD, SS of supernatant liquor and turbidity are down to 40mg/L, 20mg/L, below 15NTU respectively), obtain thickened sludge (water ratio is 75 ~ 85%);
(3) thickened sludge is mixed by a certain percentage with coal, additive, and thickened sludge dry weight (namely by the water-free sludge quality of water ratio conversion) accounts for 10 ~ 18% of sludge coal slurry solid content, ball milling, the particle diameter of solid particulate is made to be less than 0.1mm, and the particle diameter of≤75 μm accounts for 70-80%, obtained high concentration sludge coal slurry.
Above-mentioned municipal sludge prepares the method for high concentration sludge coal slurry, and the parts by weight of described primary sludge, sludge conditioner, coal, additive are respectively:
Primary sludge 150 ~ 250 parts
Sludge conditioner 3 ~ 8 parts
56 ~ 62 parts, coal
Additive 0.8 part.
Above-mentioned municipal sludge prepares the method for high concentration sludge coal slurry, and described primary sludge is from municipal sewage plant's untreated sludge, and its water ratio is 98%.
Above-mentioned municipal sludge prepares the method for high concentration sludge coal slurry, and the dry ash-free basis volatilization of described coal is divided into 22 ~ 30%, and air dried basis ash content is 7 ~ 10%, air-dried moisture≤2%, full sulphur≤0.8% of empty butt.
Above-mentioned municipal sludge prepares the method for high concentration sludge coal slurry, and described additive is DCS composite additive and xylogen naphthalene sulphonate formaldehyde polymkeric substance, and its relative molecular mass is 3000 ~ 6000, and pH value is 10 ~ 12.
Above-mentioned municipal sludge prepares the method for high concentration sludge coal slurry, described sludge conditioner is by charcoal (granularity is 0.045mm ~ 0.425mm), sodium-chlor (technical grade) and polyacrylamide (technical grade, positively charged ion, molecular weight>=1,200 ten thousand) composition, its consumption accounts for 1.5 ~ 2.5%, 0.5 ~ 1%, 1 × 10 of primary sludge quality respectively
-4~ 5 × 10
-4%.
Above-mentioned municipal sludge prepares the method for high concentration sludge coal slurry, described charcoal is the solid product that brown coal obtain with the mass ratio mixing copyrolysis of 2:1 with biomass (rice hulls, wood sawdust etc.), pyrolysis temperature is 650 ~ 750 DEG C, pyrolysis time is 2 ~ 2.5h, its air dried basis ash content is 10 ~ 12%, full sulphur≤0.5% of empty butt.
Illustrate: above-mentioned percentage ratio all represents massfraction.
Beneficial effect of the present invention is:
(1) the present invention is that main raw material prepares sludge conditioner with charcoal, effectively can improve the dewatering of mud and improve the calorific value of mud, realizing sludge deep thickening.
(2) the present invention's thickened sludge directly mixes sludge coal slurry processed with coal, does not need to carry out drying in advance to mud, has both simplified the preparation technology of sludge coal slurry; reduce costs; realize again recycling sludge to utilize, protection of the environment, has good economic benefit and market outlook.
Embodiment
Below by specific embodiment, the present invention is described in further detail, and wherein, unless otherwise indicated, described raw material number is parts by weight, and percentage ratio is massfraction.
Embodiment 1
1. raw material
(1) Xiangtan City sludge of sewage treatment plant, its water ratio is 98%.
(2) sludge conditioner comprises charcoal (its granularity is 0.045mm ~ 0.425mm, air dried basis ash content is 10.86%, the full sulphur of empty butt is 0.46%, dosage is 1.5g/100g primary sludge), sodium-chlor (technical grade, its dosage is 0.5g/100g primary sludge), polyacrylamide (technical grade, cationic, molecular weight>=1,200 ten thousand, its dosage is 1 × 10
-4g/100g primary sludge.
(3) Xiang Tan Tan Jiashan coal, its total water is 12.62%, air-dried moisture 1.15%, and air dried basis ash content is 7.94%, and air dried basis volatilization is divided into 22.87%
(4) additive (DCS composite additive)
2. preparation method
(1) proportioning raw materials
Primary sludge 150 parts, sludge conditioner 3 parts, 62 parts, coal, additive 0.8 part.
(2) preparation process
First, water-containing sludge is fully mixed 5 minutes with sludge conditioner, obtain modified rear mud.Then, modified rear mud is proceeded in graduated cylinder and leave standstill 20 minutes, carry out gravity concentration dehydration, discharge supernatant liquor, obtain thickened sludge (water ratio 84.7%).Subsequently, above-mentioned thickened sludge is mixed with coal, additive (thickened sludge dry weight accounts for 10% of sludge coal slurry solid content), send into ball mill and carry out ball milling 30 minutes, be finally that 40 object sieves filter the sludge coal slurry after ball milling with aperture, stir 10 minutes again, obtained high concentration sludge coal slurry.
3. sludge coal slurry technical performance index
The concentration (wt%) of obtained sludge coal slurry is 60.2%, and calorific value is 17.32MJ/kg, and viscosity is 866mPa
.s, granularity≤0.1mm, the particulate matter of wherein≤75 μm accounts for 71%, leaves standstill and does not produce precipitation in 15 days, have satisfactory stability performance.Can as the clean fuel of replacing oil combustion or the gasified raw material producing chemical fertilizer, methyl alcohol, Sweet natural gas.
Embodiment 2
1. raw material
(1) Xiangtan City sludge of sewage treatment plant, its water ratio is 98%.
(2) sludge conditioner comprises charcoal (its granularity is 0.045mm ~ 0.425mm, air dried basis ash content is 10.86%, the full sulphur of empty butt is 0.46%, dosage is 1.5g/100g primary sludge), sodium-chlor (technical grade, its dosage is 0.7g/100g primary sludge), polyacrylamide (technical grade, cationic, molecular weight>=1,200 ten thousand, its dosage is 3 × 10
-4g/100g primary sludge.
(3) Xiang Tan Tan Jiashan coal, its total water is 12.62%, air-dried moisture 1.15%, and air dried basis ash content is 7.94%, and air dried basis volatilization is divided into 22.87%
(4) additive (DCS composite additive)
2. preparation method
(1) proportioning raw materials
Primary sludge 200 parts, sludge conditioner 4.4 parts, 61 parts, coal, additive 0.8 part.
(3) preparation process
First, water-containing sludge is fully mixed 5 minutes with sludge conditioner, obtain modified rear mud.Then, modified rear mud is proceeded in graduated cylinder and leave standstill 40 minutes, carry out gravity concentration dehydration, discharge supernatant liquor, obtain thickened sludge (water ratio 78.9%).Subsequently, above-mentioned thickened sludge is mixed with coal, additive (thickened sludge dry weight accounts for 13.8% of sludge coal slurry solid content), send into ball mill and carry out ball milling 30 minutes, be finally that 40 object sieves filter the sludge coal slurry after ball milling with aperture, stir 10 minutes again, obtained high concentration sludge coal slurry.
3. sludge coal slurry technical performance index
The concentration (wt%) of obtained sludge coal slurry is 61.0%, and calorific value is 17.38MJ/kg, and viscosity is 968mPa
.s, granularity≤0.1mm, the particulate matter of wherein≤75 μm accounts for 72%, leaves standstill and does not produce precipitation in 15 days, have satisfactory stability performance.Can as the clean fuel of replacing oil combustion or the gasified raw material producing chemical fertilizer, methyl alcohol, Sweet natural gas.
Embodiment 3
1. raw material
(1) Xiangtan City sludge of sewage treatment plant, its water ratio is 98%.
(2) sludge conditioner comprises charcoal (its granularity is 0.045mm ~ 0.425mm, air dried basis ash content is 10.86%, the full sulphur of empty butt is 0.46%, dosage is 1.5g/100g primary sludge), sodium-chlor (technical grade, its dosage is 1.0g/100g primary sludge), polyacrylamide (technical grade, cationic, molecular weight>=1,200 ten thousand, its dosage is 5 × 10
-4g/100g primary sludge.
(3) Xiang Tan Tan Jiashan coal, its total water is 12.62%, air-dried moisture 1.15%, and air dried basis ash content is 7.94%, and air dried basis volatilization is divided into 22.87%
(4) additive (DCS composite additive)
2. preparation method
(1) proportioning raw materials
Primary sludge 250 parts, sludge conditioner 6.25 parts, 56 parts, coal, additive 0.8 part.
(4) preparation process
First, water-containing sludge is fully mixed 5 minutes with sludge conditioner, obtain modified rear mud.Then, modified rear mud is proceeded in graduated cylinder and leave standstill 30 minutes, carry out gravity concentration dehydration, discharge supernatant liquor, obtain thickened sludge (water ratio 75.1%).Subsequently, above-mentioned thickened sludge is mixed with coal, additive (thickened sludge dry weight accounts for 18.0% of sludge coal slurry solid content), send into ball mill and carry out ball milling 30 minutes, be finally that 40 object sieves filter the sludge coal slurry after ball milling with aperture, stir 10 minutes again, obtained high concentration sludge coal slurry.
3. sludge coal slurry technical performance index
The concentration (wt%) of obtained sludge coal slurry is 60.3%, and calorific value is 17.16MJ/kg, and viscosity is 928mPa
.s, granularity≤0.1mm, the particulate matter of wherein≤75 μm accounts for 74%, leaves standstill and does not produce precipitation in 15 days, have satisfactory stability performance.Can as the clean fuel of replacing oil combustion or the gasified raw material producing chemical fertilizer, methyl alcohol, Sweet natural gas.
Embodiment 4
1. raw material
(1) Xiangtan City sludge of sewage treatment plant, its water ratio is 98%.
(2) sludge conditioner comprises charcoal (its granularity is 0.045mm ~ 0.425mm, air dried basis ash content is 10.86%, the full sulphur of empty butt is 0.46%, dosage is 2.0g/100g primary sludge), sodium-chlor (technical grade, its dosage is 0.7g/100g primary sludge), polyacrylamide (technical grade, cationic, molecular weight>=1,200 ten thousand, its dosage is 1 × 10
-4g/100g primary sludge.
(3) Xiang Tan Tan Jiashan coal, its total water is 12.62%, air-dried moisture 1.15%, and air dried basis ash content is 7.94%, and air dried basis volatilization is divided into 22.87%
(4) additive (DCS composite additive)
2. preparation method
(1) proportioning raw materials
Primary sludge 150 parts, sludge conditioner 4.05 parts, 61 parts, coal, additive 0.8 part.
(5) preparation process
First, water-containing sludge is fully mixed 5 minutes with sludge conditioner, obtain modified rear mud.Then, modified rear mud is proceeded in graduated cylinder and leave standstill 40 minutes, carry out gravity concentration dehydration, discharge supernatant liquor, obtain thickened sludge (water ratio 82.1%).Subsequently, above-mentioned thickened sludge is mixed with coal, additive (thickened sludge (giving money as a gift) accounts for 11.6% of sludge coal slurry solid content), send into ball mill and carry out ball milling 30 minutes, be finally that 40 object sieves filter the sludge coal slurry after ball milling with aperture, stir 10 minutes again, obtained high concentration sludge coal slurry.
3. sludge coal slurry technical performance index
The concentration (wt%) of obtained sludge coal slurry is 60.4%, and calorific value is 17.38MJ/kg, and viscosity is 918mPa
.s, granularity≤0.1mm, the particulate matter of wherein≤75 μm accounts for 71%, leaves standstill and does not produce precipitation in 15 days, have satisfactory stability performance.Can as the clean fuel of replacing oil combustion or the gasified raw material producing chemical fertilizer, methyl alcohol, Sweet natural gas.
Embodiment 5
1. raw material
(1) Xiangtan City sludge of sewage treatment plant, its water ratio is 98%.
(2) sludge conditioner comprises charcoal (its granularity is 0.045mm ~ 0.425mm, air dried basis ash content is 10.86%, the full sulphur of empty butt is 0.46%, dosage is 2.0g/100g primary sludge), sodium-chlor (technical grade, its dosage is 1.0g/100g primary sludge), polyacrylamide (technical grade, cationic, molecular weight>=1,200 ten thousand, its dosage is 3 × 10
-4g/100g primary sludge.
(3) Shandong coal, its total water is 11.62%, air-dried moisture 1.95%, and air dried basis ash content is 8.26%, and air dried basis volatilization is divided into 29.69%
(4) additive (DCS composite additive)
2. preparation method
(1) proportioning raw materials
Primary sludge 200 parts, sludge conditioner 6.0 parts, 58 parts, coal, additive 0.8 part.
(6) preparation process
First, water-containing sludge is fully mixed 5 minutes with sludge conditioner, obtain modified rear mud.Then, modified rear mud is proceeded in graduated cylinder and leave standstill 50 minutes, carry out gravity concentration dehydration, discharge supernatant liquor, obtain thickened sludge (water ratio 77.1%).Subsequently, above-mentioned thickened sludge is mixed with coal, additive (thickened sludge (giving money as a gift) accounts for 16.6% of sludge coal slurry solid content), send into ball mill and carry out ball milling 30 minutes, be finally that 40 object sieves filter the sludge coal slurry after ball milling with aperture, stir 10 minutes again, obtained high concentration sludge coal slurry.
3. sludge coal slurry technical performance index
The concentration (wt%) of obtained sludge coal slurry is 60.9%, and calorific value is 17.24MJ/kg, and viscosity is 1020mPa
.s, granularity≤0.1mm, the particulate matter of wherein≤75 μm accounts for 73%, leaves standstill and does not produce precipitation in 15 days, have satisfactory stability performance.Can as the clean fuel of replacing oil combustion or the gasified raw material producing chemical fertilizer, methyl alcohol, Sweet natural gas.
Embodiment 6
1. raw material
(1) Xiangtan City sludge of sewage treatment plant, its water ratio is 98%.
(2) sludge conditioner comprises charcoal (its granularity is 0.045mm ~ 0.425mm, air dried basis ash content is 10.86%, the full sulphur of empty butt is 0.46%, dosage is 2.0g/100g primary sludge), sodium-chlor (technical grade, its dosage is 0.5g/100g primary sludge), polyacrylamide (technical grade, cationic, molecular weight>=1,200 ten thousand, its dosage is 4 × 10
-4g/100g primary sludge.
(3) Shandong coal, its total water is 11.62%, air-dried moisture 1.95%, and air dried basis ash content is 8.26%, and air dried basis volatilization is divided into 29.69%
(4) additive (DCS composite additive)
2. preparation method
(1) proportioning raw materials
Primary sludge 250 parts, sludge conditioner 6.25 parts, 56 parts, coal, additive 0.8 part.
(7) preparation process
First, water-containing sludge is fully mixed 5 minutes with sludge conditioner, obtain modified rear mud.Then, modified rear mud is proceeded in graduated cylinder and leave standstill 60 minutes, carry out gravity concentration dehydration, discharge supernatant liquor, obtain thickened sludge (water ratio 75%).Subsequently, above-mentioned thickened sludge is mixed with coal, additive (thickened sludge (giving money as a gift) accounts for 18.0% of sludge coal slurry solid content), send into ball mill and carry out ball milling 30 minutes, be finally that 40 object sieves filter the sludge coal slurry after ball milling with aperture, stir 10 minutes again, obtained high concentration sludge coal slurry.
3. sludge coal slurry technical performance index
The concentration (wt%) of obtained sludge coal slurry is 60.1%, and calorific value is 17.02MJ/kg, and viscosity is 996mPa
.s, granularity≤0.1mm, the particulate matter of wherein≤75 μm accounts for 72%, leaves standstill and does not produce precipitation in 15 days, have satisfactory stability performance.Can as the clean fuel of replacing oil combustion or the gasified raw material producing chemical fertilizer, methyl alcohol, Sweet natural gas.
Embodiment 7
1. raw material
(1) Xiangtan City sludge of sewage treatment plant, its water ratio is 98%.
(2) sludge conditioner comprises charcoal (its granularity is 0.045mm ~ 0.425mm, air dried basis ash content is 10.86%, the full sulphur of empty butt is 0.46%, dosage is 2.5g/100g primary sludge), sodium-chlor (technical grade, its dosage is 1.0g/100g primary sludge), polyacrylamide (technical grade, cationic, molecular weight>=1,200 ten thousand, its dosage is 2 × 10
-4g/100g primary sludge.
(3) Shandong coal, its total water is 11.62%, air-dried moisture 1.95%, and air dried basis ash content is 8.26%, and air dried basis volatilization is divided into 29.69%
(4) additive (DCS composite additive)
2. preparation method
(1) proportioning raw materials
Primary sludge 150 parts, sludge conditioner 5.25 parts, 60 parts, coal, additive 0.8 part.
(8) preparation process
First, water-containing sludge is fully mixed 5 minutes with sludge conditioner, obtain modified rear mud.Then, modified rear mud is proceeded in graduated cylinder and leave standstill 30 minutes, carry out gravity concentration dehydration, discharge supernatant liquor, obtain thickened sludge (water ratio 79.8%).Subsequently, above-mentioned thickened sludge is mixed with coal, additive (thickened sludge (giving money as a gift) accounts for 13.7% of sludge coal slurry solid content), send into ball mill and carry out ball milling 30 minutes, be finally that 40 object sieves filter the sludge coal slurry after ball milling with aperture, stir 10 minutes again, obtained high concentration sludge coal slurry.
3. sludge coal slurry technical performance index
The concentration (wt%) of obtained sludge coal slurry is 60.8%, and calorific value is 17.41MJ/kg, and viscosity is 898mPa
.s, granularity≤0.1mm, the particulate matter of wherein≤75 μm accounts for 72%, leaves standstill and does not produce precipitation in 15 days, have satisfactory stability performance.Can as the clean fuel of replacing oil combustion or the gasified raw material producing chemical fertilizer, methyl alcohol, Sweet natural gas.
Embodiment 8
1. raw material
(1) Xiangtan City sludge of sewage treatment plant, its water ratio is 98%.
(2) sludge conditioner comprises charcoal (its granularity is 0.045mm ~ 0.425mm, air dried basis ash content is 10.86%, the full sulphur of empty butt is 0.46%, dosage is 2.5g/100g primary sludge), sodium-chlor (technical grade, its dosage is 0.5g/100g primary sludge), polyacrylamide (technical grade, cationic, molecular weight>=1,200 ten thousand, its dosage is 3 × 10
-4g/100g primary sludge.
(3) Shandong coal, its total water is 11.62%, air-dried moisture 1.95%, and air dried basis ash content is 8.26%, and air dried basis volatilization is divided into 29.69%
(4) additive (DCS composite additive)
2. preparation method
(1) proportioning raw materials
Primary sludge 200 parts, sludge conditioner 6 parts, 58 parts, coal, additive 0.8 part.
(9) preparation process
First, water-containing sludge is fully mixed 5 minutes with sludge conditioner, obtain modified rear mud.Then, modified rear mud is proceeded in graduated cylinder and leave standstill 40 minutes, carry out gravity concentration dehydration, discharge supernatant liquor, obtain thickened sludge (water ratio 76.6%).Subsequently, above-mentioned thickened sludge is mixed with coal, additive (thickened sludge (giving money as a gift) accounts for 16.5% of sludge coal slurry solid content), send into ball mill and carry out ball milling 30 minutes, be finally that 40 object sieves filter the sludge coal slurry after ball milling with aperture, stir 10 minutes again, obtained high concentration sludge coal slurry.
3. sludge coal slurry technical performance index
The concentration (wt%) of obtained sludge coal slurry is 60.7%, and calorific value is 17.25MJ/kg, and viscosity is 966mPa
.s, granularity≤0.1mm, the particulate matter of wherein≤75 μm accounts for 72%, leaves standstill and does not produce precipitation in 15 days, have satisfactory stability performance.Can as the clean fuel of replacing oil combustion or the gasified raw material producing chemical fertilizer, methyl alcohol, Sweet natural gas.
Claims (8)
1. municipal sludge prepares a method for high concentration sludge coal slurry, it is characterized in that comprising the following steps:
(1) sludge conditioner is adopted to carry out modified to primary sludge;
(2) within 20 ~ 60 minutes, carry out gravity concentration dehydration by standing for modified rear mud, discharge supernatant liquor, obtain thickened sludge;
(3) thickened sludge is mixed by a certain percentage with coal, additive, and thickened sludge dry weight accounts for 10 ~ 18% of sludge coal slurry solid content; Ball milling; Make the particle diameter of solid particulate be less than 0.1mm, the particle diameter of wherein≤75 μm accounts for 70-80%, obtains high concentration sludge coal slurry;
Described sludge conditioner is made up of charcoal, sodium-chlor and polyacrylamide.
2. municipal sludge according to claim 1 prepares the method for high concentration sludge coal slurry, it is characterized in that: the parts by weight of described primary sludge, sludge conditioner, coal, additive are respectively:
3. municipal sludge according to claim 1 prepares the method for high concentration sludge coal slurry, it is characterized in that: the consumption of described charcoal, sodium-chlor and polyacrylamide accounts for 1.5 ~ 2.5%, 0.5 ~ 1%, 1 × 10 of primary sludge quality respectively
-4~ 5 × 10
-4%.
4. municipal sludge according to claim 3 prepares the method for high concentration sludge coal slurry, it is characterized in that: described charcoal is brown coal and the solid product of biomass by the mass ratio mixing copyrolysis of 2:1, pyrolysis temperature is 650 ~ 750 DEG C, pyrolysis time is 2 ~ 2.5h, its granularity is 0.045mm ~ 0.425mm, air dried basis ash content is 10% ~ 12%, full sulphur≤0.5% of empty butt; Described sodium-chlor is technical grade; Described polyacrylamide is technical grade, positively charged ion, molecular weight >=1,200 ten thousand.
5. municipal sludge according to claim 1 prepares the method for high concentration sludge coal slurry, it is characterized in that: described primary sludge is from municipal sewage plant's untreated sludge, and water ratio is 98%.
6. municipal sludge according to claim 1 prepares the method for high concentration sludge coal slurry, it is characterized in that: the water ratio of described thickened sludge is 75 ~ 85%.
7. municipal sludge according to claim 1 prepares the method for high concentration sludge coal slurry, it is characterized in that: the dry ash-free basis volatilization of described coal is divided into 22% ~ 30%, air dried basis ash content is 7% ~ 10%, air-dried moisture≤2%, full sulphur≤0.8% of empty butt.
8. municipal sludge according to claim 1 prepares the method for high concentration sludge coal slurry, it is characterized in that: described additive is DCS composite additive and xylogen naphthalene sulphonate formaldehyde polymkeric substance, its relative molecular mass is 3000 ~ 6000, and pH value is 10 ~ 12.
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| CN104961324A (en) * | 2015-07-17 | 2015-10-07 | 南通天蓝环保能源成套设备有限公司 | Sludge conditioner before sludge incineration and application thereof |
| CN106916612B (en) * | 2017-02-24 | 2018-07-27 | 浙江大学 | The method for improving sludge water-coal-slurry slurry performance by sludge pretreatment |
| CN108503187A (en) * | 2017-02-28 | 2018-09-07 | 中国石油化工股份有限公司 | A kind of method that oily sludge goes water-coal-slurry harmless treatment |
| CN113278445B (en) * | 2021-05-22 | 2022-10-28 | 山东恒力新能源工程有限公司 | Hydrogen production and hydrocracking device for synergistic treatment of tar residues and domestic sludge and process thereof |
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