CN201012999Y - Paper-making black liquor alkali reclaimer - Google Patents
Paper-making black liquor alkali reclaimer Download PDFInfo
- Publication number
- CN201012999Y CN201012999Y CNU2007200835317U CN200720083531U CN201012999Y CN 201012999 Y CN201012999 Y CN 201012999Y CN U2007200835317 U CNU2007200835317 U CN U2007200835317U CN 200720083531 U CN200720083531 U CN 200720083531U CN 201012999 Y CN201012999 Y CN 201012999Y
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- CN
- China
- Prior art keywords
- black liquor
- communicated
- pipeline
- flash tank
- heat absorber
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- Expired - Fee Related
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Abstract
The utility model discloses an alkali recovery device from the papermaking black liquor, comprising an alkali recovery boiler and a multi-effect vacuum vaporization system, is characterized in that the utility model also comprises a tubular heat absorber communicated with a gas outlet of the alkali recovery boiler through a gas pipeline, a cylindrical dust remover which is provided with a chimney and communicated with the heat absorber on a tangent line of a case, a flash tank which is arranged under and communicated with the dust remover through the pipeline, a steam outlet pipe which is arranged on the upper end of the flash tank and connected with the multi-effect vacuum vaporization system, a black liquor output pipe arranged on the underside of the flash tank and a liquid pump arranged on the output pipe; and a black liquor output port, a diluted black liquor enter port and a jet nozzle are all arranged in order on the pipeline behind the liquid pump from top to bottom; wherein, the black liquid jet nozzle is arranged on a communication joint between the gas outlet pipeline of the alkali recovery boiler and the heat absorber. The apparatus has the advantages of the simple structure, the low fabrication cost, the easy operation, the low running cost, the low exhausted gas temperature and the high heat efficiency, thereby being suitable for the alkali recovery in the discharged black liquor in the various papermaking.
Description
Technical field
The utility model relates to a kind of regenerating unit of paper-making pulping soup, especially the black liquid soda recovery unit.
Background technology
At present, domestic paper-making industry great majority in the system process of pulp all can give off the bigger black liquor of alkalinity, and the alkali in this black liquor is recyclable regeneration.Existing black liquid soda recovery unit has two kinds of versions, and a kind of is the alkali stove that comprises band water-cooling wall boiler, venturi cyclone evaporator and the multiple-effect vacuum vaporation system that black liquor directly evaporates.Its operation principle is: black liquor burns in the alkali stove and emits heat, produce steam for the rare black liquor of multiple-effect vacuum vaporation system evaporation and concentration, the flue gas that comes out from the alkali stove directly contacts evaporation with half concentrated black liquid that the multiple-effect vacuum vaporation system comes out the venturi cyclone evaporator, the steam and the flue gas that produce are sent into the chimney emptying by air-introduced machine, black liquor after concentrating send the burning of alkali stove, and the inorganic matter after the burning reclaims through causticization becomes the alkali that slurrying is used.Its shortcoming is that steam generator system is set, and complex structure, cost are very high, operation easier is big, operating cost is high, and directly the heat of evaporator section can only utilize once.Another kind of version is that the alkali stove is built into refractory material, no boiler, not producing steam.In the alkali stove, the high-temperature flue gas that the burning black liquor produces directly contacts evaporation with black liquor alkali, and the steam of generation is sent into the chimney emptying with flue gas by air-introduced machine, and the inorganic matter after the burning reclaims through causticization becomes the alkali that slurrying is used.Its shortcoming is that the heat that produces of black liquor alkali burning can only flush distillation black liquor alkali, and the thermal efficiency is low, inaccessible thermal balance, energy consumption height, production cost height.
Summary of the invention
The purpose of this utility model provides a kind of simple in structure, and cost is low, the black liquid soda recovery unit that easy operating and operating cost are low.
The utility model comprises alkali stove and multiple-effect vacuum vaporation system, it is characterized in that also comprising:
The tubulose heat absorber that is communicated with the exhanst gas outlet of alkali stove by pipeline;
On the housing tangent line with reach and state the cylindric band chimney deduster that heat absorber is communicated with;
Be located at below the described deduster, and the steam flash tank that is communicated with by pipeline, the upper end of this steam flash tank is provided with the siphunculus that is connected with described multiple-effect vacuum vaporation system, bottom surface is provided with the black liquor efferent duct, on this efferent duct, be provided with liquid pump, be provided with black liquor delivery outlet and rare black liquor nozzle on the pipeline of liquid pump back in regular turn, wherein, rare black liquor nozzle is located at the junction that described alkali kiln gas outlet is communicated with heat absorber.
The black liquid soda recovery unit of said structure, its operation principle is: that need to reclaim contains the side of alkali black liquor from the alkali stove, spray into the stove internal combustion with spray gun, the black liquor that burns in the alkali stove is emitted heat and is produced high-temperature flue gas, high-temperature flue gas enters heat absorber and directly contacts with the low temperature black liquor of black liquor nozzle ejection, black liquor is heated, flue gas and black liquor enter cylindric deduster from tangential direction together then, owing on tangential direction, spray into, can in deduster, form the air-flow of cyclone type, black liquor in the flue gas is separated by cyclonic air flow with flue dust, and the flue gas after the purification separation is discharged from chimney.The pipeline of the black liquor of high temperature below deduster enters the steam flash tank of below, produces about 75 ℃ negative pressure steam, carries out black liquor vaporizing by efferent duct for the multiple-effect vacuum vaporation system, reclaims alkali wherein, utilizes again.Low temperature black liquor after the flash distillation is sent black liquor nozzle and heat absorber heating back to circulating pump, enters next circulation reclaimer.Compared with prior art, the utility model can separate and flash distillation by heat, cyclonic air flow without steam generator system, makes black liquor produce steam and reclaims alkali for the vacuum evaporation of black liquor multiple-effect, and the heat that black-liquor combustion produces can repeatedly evaporate black liquor.This apparatus structure is simple, cost is low, easy operating, operating cost are low, and exhaust gas temperature is low, the thermal efficiency is high.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Shown in Figure 1, be structural representation of the present utility model.Among Fig. 1, be provided with chute 2, primary air nozzle 3, overfiren air port 4, black liquor spray gun 5, tertiary air orifice 6, the smoke outlet tube 9 that communicates with furnace chamber from the bottom up in regular turn in the furnace wall 7 of alkali stove 8.Wherein, the below of chute 2 outlets is provided with and connects the dissolving tank 1 that flows out fused mass from alkali stove 8 bottoms; Smoke outlet tube 9 is located at furnace roof and is folded to a termination of heat absorber 11 and is communicated with, and is provided with the black liquor nozzle 10 that is communicated with by pipe with flash tank 18 in both junctions, and emission direction is from heat absorber 11 toward deduster 14.The structure of alkali stove 8 is the equipment of prior art.Heat absorber 11 is communicated with it at the tangent line place of cylindrical shape deduster 14, makes the black liquor of nozzle 10 ejection and high-temperature flue gas that exhanst gas outlet is discharged form one rotational gas flow, helps separating of cigarette and black liquor.The top of deduster 14 is provided with black liquor profit wall distributing pipe 12 and chimney 13.One end of black liquor profit wall pipe 12 is communicated with black liquor circulation pipe 23, and the other end is communicated with the upper top inner chamber of deduster 14, and black liquor is sprayed on the inwall of deduster 14, the dust on the flushing inwall.The top of deduster 14 bottoms and flash tank 18 is shared, and deduster 14 bottom black liquor are communicated with flash tank 18 inner chambers through U type pipe 17.U type pipe 17 plays the effect of fluid-tight, prevents that flue gas from entering flash tank 18.Demister 16 is fixed on the top of flash tank 18, removes the liquid foam in the devaporation, purge vapor.Vapor outlet port pipe 15 and is communicated with the inner chamber of flash tank 18 on the shell 19 that is welded on flash tank 18 above the demister 16.The steam of vapor outlet port pipe 15 outputs carries out black liquor vaporizing for the multiple-effect vacuum vaporation system.Be provided with black liquid outlet pipe 20 in the bottom of flash tank 18.This pipe 20 is provided with black liquor circulating pump 22 and black liquor circulation pipe 23.On black liquor circulation pipe 23, be provided with concentrated black liquid outlet 24, rare black liquor inlet tube 25 and black liquor nozzle 10 from bottom to up in regular turn, and communicate.Alkali stove 8 and flash tank 18 are installed on the basis 21.Certainly, flash tank 18 also can separate independent setting with deduster 14, is communicated with by pipeline.Described alkali stove comprises the alkali stove of band water-cooling wall boiler and the alkali stove that is built into refractory material.
Operation principle of the present utility model is: alkali stove 8 burning black liquor are emitted heat and are produced high-temperature flue gas, high-temperature flue gas enters heat absorber 10 through smoke outlet tube 9 and directly contacts with the low temperature black liquor of nozzle 11 ejections, black liquor is heated to about 85 ℃, flue gas and black liquor enter deduster 14 together then, black liquor in the flue gas and flue dust are by cyclonic separation, and flue gas after being purified is discharged from chimney 13.The black liquor of high temperature enters steam flash tank 18 through U type pipe 17 and produces negative pressure steam, and negative pressure steam is discharged from steam outlet pipe 15 after demister 16 foam removals, carries out black liquor vaporizing for the multiple-effect vacuum vaporation system.Low temperature black liquor after the flash distillation is sent heat absorber 10 heating back to through circulating pump.Rare black liquor enters systemic circulation through rare black liquor inlet tube 25, and the concentrated black liquid after the flash distillation is discharged from concentrated black liquid outlet 24, send the burning of alkali stove then.
Claims (2)
1. black liquid soda recovery unit, it comprises alkali stove (8) and multiple-effect vacuum vaporation system, it is characterized in that also comprising:
The tubulose heat absorber (11) that is communicated with the exhanst gas outlet of alkali stove (8) by flue (9);
The cylindric band chimney deduster (14) that on the housing tangent line, is communicated with described heat absorber (11);
Be located at below the described deduster (14), and the flash tank (18) that is communicated with by pipeline (17), the upper end of this flash tank (18) is provided with the vapor outlet port pipe (15) that is connected with described multiple-effect vacuum vaporation system, bottom surface is provided with black liquor efferent duct (20), on this efferent duct (20), be provided with liquid pump (22), on the pipeline of liquid pump (22) back, be provided with black liquor delivery outlet (24), rare black liquor import (25) and nozzle (10) from bottom to up in regular turn, wherein, black liquor nozzle (10) is located at the junction that described alkali stove (8) smoke outlet tube (9) is communicated with heat absorber (11).
2. black liquid soda recovery unit according to claim 1 is characterized in that:
Described flash tank (18) also can separate independent setting with deduster (14), is communicated with by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200835317U CN201012999Y (en) | 2007-02-05 | 2007-02-05 | Paper-making black liquor alkali reclaimer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200835317U CN201012999Y (en) | 2007-02-05 | 2007-02-05 | Paper-making black liquor alkali reclaimer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201012999Y true CN201012999Y (en) | 2008-01-30 |
Family
ID=39024784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200835317U Expired - Fee Related CN201012999Y (en) | 2007-02-05 | 2007-02-05 | Paper-making black liquor alkali reclaimer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201012999Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111001272A (en) * | 2019-12-09 | 2020-04-14 | 浙江天洁环境科技股份有限公司 | System and method for treating tail gas of papermaking alkaline black liquor |
-
2007
- 2007-02-05 CN CNU2007200835317U patent/CN201012999Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111001272A (en) * | 2019-12-09 | 2020-04-14 | 浙江天洁环境科技股份有限公司 | System and method for treating tail gas of papermaking alkaline black liquor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20080130 |