CN102173444A - System and method for comprehensive utilization of tail gas of aluminium sulphate reaction kettles - Google Patents
System and method for comprehensive utilization of tail gas of aluminium sulphate reaction kettles Download PDFInfo
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- CN102173444A CN102173444A CN2011100436036A CN201110043603A CN102173444A CN 102173444 A CN102173444 A CN 102173444A CN 2011100436036 A CN2011100436036 A CN 2011100436036A CN 201110043603 A CN201110043603 A CN 201110043603A CN 102173444 A CN102173444 A CN 102173444A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention discloses a system and a method for comprehensive utilization of the tail gas of aluminium sulphate reaction kettles. The invention is characterized in that: a plurality of reaction kettles are connected in parallel through an exhaust pipeline; gas and energy which are generated by reaction are applied to production of aluminium sulphate through the vent pipeline; the guided reaction tail gas having a certain heat value can be used as pressure gas during material discharging after the reaction is finished in the reaction kettles and can be also used as gas for pre-heating a material to be reacted. By the system and the method provided by the invention, no waste gas is discharged, about 20 tons of steam is saved every day, environmental pollution caused by waste gas discharging is prevented, an environment-friendly effect is obvious, the material to be reacted can be pre-heated by using waste heat, the dissolution rate of aluminium oxide is improved, and the discharging of waste residues is reduced.
Description
Technical field
Reacting aluminum sulfate still tail gas utilization system and utilize method belongs to the Tai-Ace S 150 production technical field, is specifically related to the method for comprehensive utilization that a kind of Tai-Ace S 150 produces tail gas in producing.
Background technology
The synthetic Tai-Ace S 150 technological process of ore and sulfuric acid reaction is heat release, venting, and pressure can reach 0.3MPa in compressive reaction, and temperature can be increased to 160 ℃.This gas is water vapour, carbonic acid gas etc., and it is higher wherein to contain heat, but concentrated recovery is inconvenient and investment is bigger, therefore mostly it is entered in the atmosphere.
On the other hand, during Tai-Ace S 150 is produced, after the also exhaust emptying that reacts completely, need to add a certain amount of alum liquor diluting reaction material, make it easily to discharge reactor, but existing technology is all to impel material to be discharged in the settling bowl by disposing extra steam to pressure.Usually the material of production usefulness does not pass through preheating simultaneously, causes speed of response relatively low.Since the calorific value and the pressure of aluminum ore and gas that sulfuric acid reaction produces are all higher, just provide condition in Tai-Ace S 150 production for the tail gas that fully utilizes this reaction generation.Yet find in various documents, to rarely have the industrial tail gas that generates of comprehensive utilization Tai-Ace S 150 through retrieving, and use it for the report in the Tai-Ace S 150 production.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provide a kind of minimizing existing production technique air feed power consumption, and can realize the reacting aluminum sulfate still tail gas utilization system of reaction mass preheating and utilize method.
The present invention solves the technical scheme that its technical problem takes: this reacting aluminum sulfate still tail gas utilization system, comprise a plurality of reactors, main vent line, branch's vent line and the pond of sizing mixing, it is characterized in that: a plurality of reactors are each the branch's vent line parallel connection by being communicated with main vent line respectively, main vent line is provided with the main control valve, end is connected with the pond of sizing mixing, and is respectively equipped with the branch by-pass valve control on each branch's vent line.Slurry pipeline one end is connected with each reactor, and the other end is connected with NaOH solution tank NaOH with the pond of sizing mixing.
Described reactor is 6～8 parallel connections.
Reacting aluminum sulfate still tail gas utilization system utilize method, it is characterized in that, adopt following operation steps:
1) worked in 1 hour in advance than second reactor with time order and function sequential control first reactor, first reaction kettle for reaction finishes back emptying venting, and adds alum liquor diluting reaction material in first reactor;
2) reaction mass is incubated in the first reactor kettle, when treating that second reaction kettle for reaction need to finish the emptying venting, open the branch by-pass valve control of first and second reactor, the high pressure gas in second reactor are entered in first reactor, help the reaction mass in first reactor to discharge kettle;
3) after the reaction mass emptying in first reactor, close the branch by-pass valve control of first reactor, open the main control valve, remaining high pressure gas in second reactor are entered in the pond of sizing mixing, help the stock liquid preheating;
4) repeat above-mentioned steps and successively the high pressure gas in one reactor of back are entered in the last reactor, to help last reactor discharge;
5) air feeder by outer configuration pressurizes to its inflation of last reactor, helps its reaction mass to discharge kettle smoothly.
The synthetic Tai-Ace S 150 technological process of ore and sulfuric acid reaction is heat release, venting, in compressive reaction, reacting kettle inner pressure can reach 0.3MPa, temperature can reach 160 ℃, after reacting completely, at first need the emptying of reaction gas reactor, this mixed gas calorific value is higher, reclaims inconvenience and invests bigger but concentrate.Meanwhile, finish exhaust emptying in reaction, and add after alum liquor diluting reaction material makes it to discharge reactor easily, existing technology all is material to air pressure to be discharged in the settling bowl by steam.
Invention thinking of the present invention is: make it to go here and there vapour by each reactor in parallel, like this, the high pressure gas that reaction produces for the blowing reactor provides air pressure, make reacting rear material discharge kettle smoothly by breather line.Gas that simultaneously also can this calorific value is higher enters by insulation stainless steel pipeline and gives the reaction mass preheating in the pond of sizing mixing, and the temperature of reaction mass can be brought up to about 70 ℃ in this way, improves speed of response.
Operation principles of the present invention is: whole production line is parallel on the pipeline by stainless steel pipes, and pipeline one end is shut, and each reactor all has a valve control reactor pilot-gas to come in and go out, and the pipeline the other end is linked in the pond of sizing mixing.
Tai-Ace S 150 each reaction time is 7 hours, and in 5 hours 30 minutes reaction times, evacuation time is about 40 minutes, about 20 minutes blowing time, about the reinforced 30 minutes time.When arranging production, with time order and function sequential control reaction reactor formerly than after reactor work in advance about 1 hour.In reactor formerly, finish reaction, and the emptying venting finishes, add alum liquor and regulate density when waiting for blowing, need the external world to exert pressure and help it to discharge kettle.Reacting rear material is incubated a moment in kettle, after reactor in promptly finish reaction, treat emptying venting.This waits for the high pressure gas of discharging, and can be sent to just in the reactor of reaction formerly, discharges kettle to help the reacting rear material in first reactor.When a certain reactor not after reactor provide when discharging the required air pressure of reacting rear material for it, air feeder that can be by configuration in addition be discharged kettle to its inflation pressurization smoothly to help reacting rear material.
In addition when second reactor when supplying with first reactor and also have remainder of exhaust gas the reacting rear material to discharge, can remainder of exhaust gas be fed preheating question response liquid in the pond of sizing mixing by changing valve.
Compared with prior art, reacting aluminum sulfate still tail gas utilization system of the present invention and the beneficial effect that utilizes method to have thereof are:
1. do not need to change current Tai-Ace S 150 production technique, only need on each reactor and on one the tunnel together with the stainless steel pipeline, allow highly compressed treat that discharge tail gas provides discharging pressure and is used for preheating question response liquid for the blowing reactor.
2. non-exhaust emission prevents that again waste gas from effluxing contaminate environment, and environment protecting is remarkable.
3. existing technology use is evaporated to the blowing reactor provides pressure, and waste steam is saved about 20 tons of steam every day of the present invention.
4. have the technological reaction slurries now without preheating, long reaction time, temperature increase is slow, and digesting efficiency of alumina is low, can improve digesting efficiency of alumina in the same reaction time after the preheating slurries of the present invention, reduces waste sludge discharge.
Description of drawings
Fig. 1 is reacting aluminum sulfate still tail gas utilization system of the present invention and the process schematic representation that utilizes method thereof.
Wherein, 1, first reactor 2, slurry pipeline 3, branch by-pass valve control 4, main control valve 5, size mixing pond 6, second reactor 7, main vent line 8, branch's vent line 9, NaOH solution tank NaOH 10, Material pipeline 11, settling bowl.
Accompanying drawing 1 is a preferred forms of the present invention, and the present invention will be further described below in conjunction with accompanying drawing:
Embodiment
As shown in Figure 1, this reacting aluminum sulfate still tail gas utilization system and utilize method, specifically be with a plurality of reactors by the vent line parallel connection, gas that will reaction produces and heat thereof are used for Tai-Ace S 150 by vent line production.Vent line comprises main vent line 7 and branch's vent line 8, and main vent line 7 is provided with main control valve 4, one ends and connects each branch's vent line 8, and the other end connects the pond 5 of sizing mixing, and branch's vent line 8 is connected with each reactor, which is provided with branch by-pass valve control 3.Each reactor is connected with NaOH solution tank NaOH 9 with the pond 5 of sizing mixing by slurry pipeline 2.The reactor bottom is provided with baiting valve, by Material pipeline 10 reacted material is sent in the settling bowl 11.
Because Tai-Ace S 150 each reaction time in reactor is 7 hours, in 5 hours 30 minutes reaction times, evacuation time is about 40 minutes, about 20 minutes blowing time, about the reinforced 30 minutes time.During production, in chronological sequence order arranges first reactor, 1 to the second reactor 6 to work in about 1 hour in advance.By slurry pipeline 2 raw material is sent in the reactor.Reaction finishes in first reactor 1, and the emptying venting finishes, and closes the pond valve of sizing mixing, and opens the NaOH solution tank NaOH valve, adds material density in the alum liquor conditioned reaction still by slurry pipeline 2 from NaOH solution tank NaOH 9.Reaction mass is incubated a moment in first reactor, 1 kettle, because needing the external world to exert pressure, the reactor blowing help it to discharge kettle, when treating that therefore reaction need to finish the emptying venting in second reactor 6, open the branch by-pass valve control 3 of first and second reactor 1,6, high pressure gas in second reactor 6 are entered in first reactor 1, help the reaction mass in first reactor 1 to discharge kettle; After the reaction mass emptying in first reactor 1, close the branch by-pass valve control 3 of first reactor 1, open main control valve 4, remaining high pressure gas in second reactor 6 are entered in the pond 5 of sizing mixing, help the alum liquor preheating; Repeat above-mentioned steps and successively the high pressure gas in one reactor of back are entered in the last reactor, to help last reactor discharge.When a certain reactor in the reactor of parallel connection not after reactor provide when discharging the required air pressure of reacting rear material for it, the air feeder by other configuration to its inflation pressurization, is smoothly discharged kettle to help reacting rear material by breather line.
In addition, when in second reactor 6 in supplying with first reactor 1 to discharge the reacting rear material, when also having remainder of exhaust gas, close 1 fen by-pass valve control 3 of first reactor, open main control valve 4, remainder of exhaust gas is fed preheating question response stock liquid in the pond 5 of sizing mixing by main control valve 4.
In this way the tail gas that produces in the Tai-Ace S 150 production is used, has both realized need not extra air feed pressurization, the tail gas that utilizes reactor in parallel to produce can help the smooth discharge of reactor, has reached again question response liquid is preheated to 70 ℃ of the above object.
The above only is preferred embodiment of the present invention, is not to be the restriction of invention being made other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection domain of technical solution of the present invention according to technical spirit of the present invention.
Claims (3)
1. reacting aluminum sulfate still tail gas utilization system, comprise a plurality of reactors, main vent line (7), branch's vent line (8) and the pond of sizing mixing (5), it is characterized in that: a plurality of reactors are each branch's vent line (8) parallel connection by being communicated with main vent line (7) respectively, main vent line (7) is provided with main control valve (4), end is connected with the pond of sizing mixing (5), is respectively equipped with branch by-pass valve control (3) on each branch's vent line (8).
2. reacting aluminum sulfate still tail gas utilization system according to claim 1 is characterized in that: described reactor is 6～8 parallel connections.
3. reacting aluminum sulfate still tail gas utilization system according to claim 1 and 2 utilize method, it is characterized in that, adopt following operation steps:
1) worked in 1 hour in advance than second reactor (6) with time order and function sequential control first reactor (1), reaction end back emptying is exitted in first reactor (1), and adds alum liquor diluting reaction material in first reactor (1);
2) reaction mass is incubated in first reactor (1) kettle, when treating that reaction need to finish the emptying venting in second reactor (6), open the branch by-pass valve control (3) of first and second reactor (1,6), high pressure gas in second reactor (6) are entered in first reactor (1), help the reaction mass in first reactor (1) to discharge kettle;
3) after the reaction mass emptying in first reactor (1), close the branch by-pass valve control (3) of first reactor (1), open main control valve (4), remaining high pressure gas in second reactor (6) are entered in the pond of sizing mixing (5), help the stock liquid preheating;
4) repeat above-mentioned steps and successively the high pressure gas in one reactor of back are entered in the last reactor, to help last reactor discharge;
5) air feeder by outer configuration pressurizes to its inflation of last reactor, helps its reaction mass to discharge kettle smoothly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100436036A CN102173444B (en) | 2011-02-24 | 2011-02-24 | System and method for comprehensive utilization of tail gas of aluminium sulphate reaction kettles |
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| CN2011100436036A CN102173444B (en) | 2011-02-24 | 2011-02-24 | System and method for comprehensive utilization of tail gas of aluminium sulphate reaction kettles |
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| CN102173444A true CN102173444A (en) | 2011-09-07 |
| CN102173444B CN102173444B (en) | 2013-01-16 |
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| CN2011100436036A Expired - Fee Related CN102173444B (en) | 2011-02-24 | 2011-02-24 | System and method for comprehensive utilization of tail gas of aluminium sulphate reaction kettles |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410744A (en) * | 2011-11-25 | 2012-04-11 | 佛山市通润热能科技有限公司 | Waste heat comprehensive utilization system in aluminum profile production line |
| CN108762157A (en) * | 2018-06-09 | 2018-11-06 | 中国石油大学(华东) | A kind of distributed collaboration optimal control test platform |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57184420A (en) * | 1981-05-01 | 1982-11-13 | Nissan Eng Kk | Method for desulfurizing flue gas |
| CN101140070A (en) * | 2007-10-18 | 2008-03-12 | 四川艾普高温技术应用有限责任公司 | Chemical industry device emptying tail gas process heat-recovering system |
-
2011
- 2011-02-24 CN CN2011100436036A patent/CN102173444B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57184420A (en) * | 1981-05-01 | 1982-11-13 | Nissan Eng Kk | Method for desulfurizing flue gas |
| CN101140070A (en) * | 2007-10-18 | 2008-03-12 | 四川艾普高温技术应用有限责任公司 | Chemical industry device emptying tail gas process heat-recovering system |
Non-Patent Citations (1)
| Title |
|---|
| 《河南化工》 20001231 董保彤等 造气余热综合回收技术的应用 34-35 1-3 , 第3期 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410744A (en) * | 2011-11-25 | 2012-04-11 | 佛山市通润热能科技有限公司 | Waste heat comprehensive utilization system in aluminum profile production line |
| CN102410744B (en) * | 2011-11-25 | 2013-10-16 | 佛山市通润热能科技有限公司 | Waste heat comprehensive utilization system in aluminum profile production line |
| CN108762157A (en) * | 2018-06-09 | 2018-11-06 | 中国石油大学(华东) | A kind of distributed collaboration optimal control test platform |
| CN108762157B (en) * | 2018-06-09 | 2021-05-25 | 中国石油大学(华东) | Distributed cooperative optimization control test platform |
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| CN102173444B (en) | 2013-01-16 |
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