CN201501821U - Papermaking sludge recycling treatment system - Google Patents
Papermaking sludge recycling treatment system Download PDFInfo
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- CN201501821U CN201501821U CN2009201951615U CN200920195161U CN201501821U CN 201501821 U CN201501821 U CN 201501821U CN 2009201951615 U CN2009201951615 U CN 2009201951615U CN 200920195161 U CN200920195161 U CN 200920195161U CN 201501821 U CN201501821 U CN 201501821U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model provides a papermaking sludge recycling treatment system which comprises spiral dehydration equipment, a defibering comminutor, a waste gas dryer, a high-temperature slag dryer, a separation tank, a reaction tank and an extraction tank which are orderly connected. The waste gas dryer is provided with a high-temperature waste gas inlet end. The high-temperature slag dryer is provided with a high-temperature slag inlet end. A waste gas and waste heat recovery device is arranged between the waste gas dryer and the high-temperature slag dryer. A low-temperature waste gas outlet end of the waste gas dryer is connected with the reaction tank. A waste water outlet end of the extraction tank is connected with the reaction tank. The treatment system efficiently realizes recycling the energy source and inorganic stuff in the papermaking sludge, decreases pollution of the solid wastes to environment and solves the problem of earth shortage for embedding papermaking sludge.
Description
Technical field
The utility model relates to paper industry offal treatment and application technology as the second resource field, particularly a kind of Resourceful treatment method of paper-making sludge and system.
Background technology
Pulping and paper-making is one of important industry of Chinese national economy, and the paper of China's production at present and the output of cardboard leap to the first in the world, and over nearly 3 years, secondary stock proportion in paper making raw material surpasses 56%.But, in paper-making process, produced a large amount of waste sludge from paper mill mud, with the present papermaking scale of China, estimate that the paper mill sludge that produces has reached 2,000 ten thousand tons/year.The improvement of paper mill sludge becomes the main environment protection treating object of China's paper industry.
Paper mill sludge is mainly derived from following three aspects: the one, and white clay recycle section between chemical pulping alkali recovery vehicle is the product of lotusization reaction, belongs to precipitated chalk; The 2nd, the biological sludge that produces in the paper waste treating processes; The 3rd, derive from the deinked sludge of paper-making process from waste paper deinking workshop section, the non-fiber impurity of screening scavenging process.At present, back two kinds of main sources that mud is China's paper mill sludge.
The major ingredient of biological sludge is generally: fiber fines, xylogen and derivative thereof and some organism.The complex chemical composition of waste paper pulp-making waste residue, organism accounts for 70%～90%, inorganics and metallic impurity account for 10%～30%, mainly contain plastics class, fiber fines, rag, cotton yarn, mess-tin, abandoned optical discs in the organism and, mainly be that papermaking filler is (as CaCO in the inorganics from the various pigment dyestuffs of printing-ink, tackiness agent etc.
3, alumina etc.), other inorganic salt of adding in coating (as kaolin etc.) and the pulping and papermaking processes.The chemical constitution and the characteristic of the solid slag that waste paper pulp-making and deinking process produce also are subjected to many factor affecting.
The main method of handling at present paper mill sludge in the world is landfill method and burning method, and China handles the method that paper mill sludge mainly still adopts direct landfill, the consequence that this method is brought is: need take a large amount of soils, and can cause secondary pollution to the environment around the landfill yard, more seriously many places have not had the ground landfill, and this just becomes the bottleneck of restriction enterprise development.Burning disposal obtains adopting in indivedual large-scale paper plants, but only is to handle as sewage sludge harmlessness, minimizing, paper mill sludge can not be recycled, therefore occupation of land and the pollution problem that does not fundamentally solve paper mill sludge.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and the paper mill sludge recycling treatment system of a kind of environmental protection and energy effective recycling paper mill sludge is provided.
The utility model is achieved through the following technical solutions: a kind of paper mill sludge recycling treatment system, according to treatment scheme direction, comprise successively the spiral dehydration equipment that connects, discongest tablets press, waste gas dryer, high temperature furnace slag dryer, separate tank, reaction tank and extraction pond paper mill sludge and slag; Wherein the waste gas dryer is provided with the high-temp waste gas entrance end, and the high temperature furnace slag dryer is provided with the high temperature furnace slag entrance end; Also be provided with the waste gas waste heat recovery unit between waste gas dryer and the high temperature furnace slag dryer, the entrance end of waste gas waste heat recovery unit is connected with the high temperature furnace slag dryer, and the waste gas outlet end is connected with the waste gas dryer, and the used heat exit end is connected with the high temperature furnace slag dryer; The low temperature waste gas exit end of waste gas dryer is connected with reaction tank, and the wastewater outlet end that extracts the pond is connected with reaction tank, and reaction tank also is provided with the extraneous water entrance end.
Described waste gas waste heat recovery unit is to be used for boiler that the mud granule after the oven dry is burnt and reclaims.
Be provided with two slag passage in the described high temperature furnace slag dryer, be respectively in the system high temperature furnace slag passage outside the high temperature furnace slag passage and system, drying cylinder inside is provided with stator.
During paper mill sludge recycling treatment system works of the present utility model, paper mill sludge passes through mechanical dehydration successively, discongests granulation and secondary drying, final combustion reclaims its waste gas used heat, waste gas is reused for the preliminary oven dry of paper mill sludge, and the slag that will have used heat is reused for the further oven dry of paper mill sludge; And the low temperature slag that produces behind the secondary drying is through the low temperature waste gas generation chemical reaction that separates, produce with preliminary oven dry, extract and deliver to postprocessing working procedures at last, and its product can be used as new papermaking filler etc.
Can realize a kind of Resourceful treatment method of paper-making sludge by said system, may further comprise the steps:
(1) paper mill sludge is carried out mechanical dehydration earlier, break up granulation again, form mud granule;
(2) utilize high-temp waste gas and high temperature furnace slag that mud granule is carried out secondary drying, burn then; High-temp waste gas and high temperature furnace slag recycle that the mud granule burning produces, the low temperature waste gas that the mud granule secondary drying produces is sent into reaction tank, and the low temperature slag that the mud granule secondary drying produces is sent into separate tank;
(3) add water in separate tank, make the solvend dissolving in the low temperature slag, separate then, the recovery solution of generation is delivered to reaction tank, and waste residue is discharged system;
(4) thin up in reaction tank, low temperature waste gas and recovery solution reaction obtain product solution;
(5) product solution is delivered to the extraction pond and extracted, the product that obtains is sent into post-processing stages, and the waste water of generation is sent reaction tank back to and recycled.
In the aforesaid method, described step (1) is specially:
(1-1) paper mill sludge is sent into the spiral dehydration equipment and carried out mechanical dehydration, obtain mass dryness fraction and be 40%～45% paper mill sludge, send into then and discongest tablets press;
(1-2) discongest tablets press and paper mill sludge is broken up and carried out granulation, obtain the convenient further mud granule of oven dry.
Described step (2) is specially:
(2-1) mud granule that step (1) is obtained is sent into the waste gas dryer, and in the waste gas dryer, feed high-temp waste gas, by heat exchange mud granule is tentatively dried, become low temperature waste gas after the high-temp waste gas heat exchange and deliver to reaction tank, deliver to the high temperature furnace slag dryer through the mud granule of preliminary oven dry;
(2-2) in the high temperature furnace slag dryer, add high temperature furnace slag from the system outside, by heat exchange mud granule is further dried, obtain mass dryness fraction and be the mud granule more than 75%, deliver to separate tank by the low temperature slag that the internal system slag becomes after heat exchange, mud granule through further oven dry is delivered to boiler, and the outside slag of system becomes waste residue and discharges system after heat exchange;
(2-3) in boiler, will burn, then the high-temp waste gas that produces is delivered to the waste gas dryer and recycle, deliver to separate tank after the high temperature furnace slag that produces is delivered to the heat exchange of high temperature furnace slag dryer through the mud granule of secondary drying;
The major ingredient that reclaims solution described in the step (3) is Ca (OH)
2The major ingredient of product solution is CaCO described in the step (4)
3
After can adopting water dissolution to the separation of low temperature slag in the described step (3), solution is delivered to reaction tank, and throw out is discharged the mode of system as waste residue.
Extraction to product solution in the described step (5) can be adopted the precipitation waste residue, extracts the mode of surplus solution then.
Compared with prior art, the utlity model has following beneficial effect:
1, the utility model has effectively been realized recycling to paper mill sludge having reduced the pollution of paper mill sludge to environment to the treatment process of paper mill sludge and system thereof, has also solved the nervous problem of land used of traditional paper mill sludge landfill method.
2, treatment system of the present utility model is dewatered to paper mill sludge earlier and is discongested granulation, by high-temp waste gas and high temperature furnace slag paper mill sludge is carried out secondary drying again, the mass dryness fraction of paper mill sludge can be brought up to more than 75%, helps the burning of paper mill sludge; And high-temp waste gas that paper mill sludge burning produces and high temperature furnace slag can recycles, significantly reduced the pollution to environment; Low temperature waste gas that oven dry produces and low temperature slag can be used as papermaking filler again through after a series of processing, have effectively realized the resource recycling to paper mill sludge.
3, the spiral dehydration equipment in the utility model system can adopt the common sludge dehydration equipment of existing market, as spiral dehydration equipment or belt water extracter etc.; Also can be by its screw shaft and screen cylinder be improved, can high-level efficiency, high life ground realizes the dehydration to mud, the mass dryness fraction of mud reached more than 40%, for the operation of back is laid a good foundation.
4, the high temperature furnace slag dryer in the utility model system has realized that by its slag transfer passage is improved the heat energy of high temperature furnace slag and paper mill sludge fully exchanges, and improves heat exchanger effectiveness, the mass dryness fraction of paper mill sludge can be brought up to more than 75%.
Description of drawings
Fig. 1 is the schematic flow sheet of Resourceful treatment method of paper-making sludge of the present utility model.
Fig. 2 is the structural representation of high temperature furnace slag dryer in the utility model system.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment
A kind of paper mill sludge recycling treatment of present embodiment system, as shown in Figure 1, according to treatment scheme direction, comprise successively the spiral dehydration equipment that connects, discongest tablets press, waste gas dryer, high temperature furnace slag dryer, separate tank, reaction tank and extraction pond paper mill sludge and slag; Wherein the waste gas dryer is provided with the high-temp waste gas entrance end, and the high temperature furnace slag dryer is provided with the high temperature furnace slag entrance end; Also be provided with the waste gas waste heat recovery unit between waste gas dryer and the high temperature furnace slag dryer, the entrance end of waste gas waste heat recovery unit is connected with the high temperature furnace slag dryer, and the waste gas outlet end is connected with the waste gas dryer, and the used heat exit end is connected with the high temperature furnace slag dryer; The low temperature waste gas exit end of waste gas dryer is connected with reaction tank, and the wastewater outlet end that extracts the pond is connected with reaction tank, and reaction tank also is provided with the extraneous water entrance end.
In the said system, the waste gas waste heat recovery unit is to be used for boiler that the mud granule after the oven dry is burnt and reclaims.
The spiral dehydration equipment can adopt the common sludge dehydration equipment of existing market, as spiral dehydration equipment or belt water extracter etc.
As shown in Figure 2, be provided with two slag passage in the high temperature furnace slag dryer, be respectively in the system high temperature furnace slag passage 2 outside the high temperature furnace slag passage 1 and system, mud 3 is in its drying cylinder top process, drying cylinder inside is provided with stator 4, take slag out of drying cylinder by stator 4, discharge system, enter next process from intrasystem slag from the slag outside the system.
During the paper mill sludge recycling treatment system works of present embodiment, paper mill sludge passes through mechanical dehydration successively, discongests granulation and secondary drying, final combustion reclaims its waste gas used heat, waste gas is reused for the preliminary oven dry of paper mill sludge, and the slag that will have used heat is reused for the further oven dry of paper mill sludge; And the low temperature slag that produces behind the secondary drying is through the low temperature waste gas generation chemical reaction that separates, produce with preliminary oven dry, extract and deliver to postprocessing working procedures at last, and its product can be used as new papermaking filler etc.
Present embodiment can be realized a kind of Resourceful treatment method of paper-making sludge by said system, as shown in Figure 1, may further comprise the steps:
(1) paper mill sludge is carried out mechanical dehydration earlier, break up granulation again, form mud granule; Be specially:
(1-1) paper mill sludge is sent into the spiral dehydration equipment and carried out mechanical dehydration, obtain mass dryness fraction and be 40%～45% paper mill sludge, send into then and discongest tablets press;
(1-2) discongest tablets press and paper mill sludge is broken up and carried out granulation, obtain the convenient further mud granule of oven dry;
(2) utilize high-temp waste gas and high temperature furnace slag that mud granule is carried out secondary drying, burn then; High-temp waste gas and high temperature furnace slag recycle that the mud granule burning produces, the low temperature waste gas that the mud granule secondary drying produces is sent into reaction tank, and the low temperature slag that the mud granule secondary drying produces is sent into separate tank; Be specially:
(2-1) mud granule that step (1) is obtained is sent into the waste gas dryer, and in the waste gas dryer, feed high-temp waste gas, by heat exchange mud granule is tentatively dried, become low temperature waste gas after the high-temp waste gas heat exchange and deliver to reaction tank, deliver to the high temperature furnace slag dryer through the mud granule of preliminary oven dry;
(2-2) in the high temperature furnace slag dryer, add high temperature furnace slag from the system outside, by heat exchange mud granule is further dried, obtain mass dryness fraction and be the mud granule more than 75%, deliver to separate tank by the low temperature slag that the internal system slag becomes after heat exchange, mud granule through further oven dry is delivered to boiler, and the outside slag of system becomes waste residue and discharges system after heat exchange;
(2-3) in boiler, will burn, then the high-temp waste gas that produces is delivered to the waste gas dryer and recycle, deliver to separate tank after the high temperature furnace slag that produces is delivered to the heat exchange of high temperature furnace slag dryer through the mud granule of secondary drying;
(3) add water in separate tank, make the solvend dissolving in the low temperature slag, separate then, the recovery solution of generation is delivered to reaction tank, and waste residue is discharged system, and the major ingredient that wherein reclaims solution is Ca (OH)
2
(4) thin up in reaction tank, low temperature waste gas and recovery solution reaction, obtaining major ingredient is CaCO
3Product solution;
(5) product solution is delivered to the extraction pond and extracted, the product that obtains is sent into post-processing stages, and the waste water of generation is sent reaction tank back to and recycled.
In the aforesaid method, can adopt water dissolution to the separation of low temperature slag in the step (3) after, solution is delivered to reaction tank, throw out is discharged the mode of system as waste residue; Extraction to product solution in the step (5) can be adopted the precipitation waste residue, extracts the mode of surplus solution then.
As mentioned above, just can realize the utility model preferably, the foregoing description is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model; Be that all equalizations of being done according to the utility model content change and modification, all contained by the utility model claim scope required for protection.
Claims (3)
1. paper mill sludge recycling treatment system, it is characterized in that, according to treatment scheme direction, comprise successively the spiral dehydration equipment that connects, discongest tablets press, waste gas dryer, high temperature furnace slag dryer, separate tank, reaction tank and extraction pond paper mill sludge and slag; Wherein the waste gas dryer is provided with the high-temp waste gas entrance end, and the high temperature furnace slag dryer is provided with the high temperature furnace slag entrance end; Also be provided with the waste gas waste heat recovery unit between waste gas dryer and the high temperature furnace slag dryer, the entrance end of waste gas waste heat recovery unit is connected with the high temperature furnace slag dryer, and the waste gas outlet end is connected with the waste gas dryer, and the used heat exit end is connected with the high temperature furnace slag dryer; The low temperature waste gas exit end of waste gas dryer is connected with reaction tank, and the wastewater outlet end that extracts the pond is connected with reaction tank, and reaction tank also is provided with the extraneous water entrance end.
2. paper mill sludge recycling treatment according to claim 1 system is characterized in that, described waste gas waste heat recovery unit is to be used for boiler that the mud granule after the oven dry is burnt and reclaims.
3. paper mill sludge recycling treatment according to claim 1 system is characterized in that, is provided with two slag passage in the described high temperature furnace slag dryer, is respectively in the system high temperature furnace slag passage outside the high temperature furnace slag passage and system, and drying cylinder inside is provided with stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201951615U CN201501821U (en) | 2009-09-22 | 2009-09-22 | Papermaking sludge recycling treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201951615U CN201501821U (en) | 2009-09-22 | 2009-09-22 | Papermaking sludge recycling treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201501821U true CN201501821U (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201951615U Expired - Fee Related CN201501821U (en) | 2009-09-22 | 2009-09-22 | Papermaking sludge recycling treatment system |
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| Country | Link |
|---|---|
| CN (1) | CN201501821U (en) |
-
2009
- 2009-09-22 CN CN2009201951615U patent/CN201501821U/en not_active Expired - Fee Related
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20120922 |