CN102976411A - Method and system for utilizing waste heat during ammonium paratungstate (APT) production process - Google Patents
Method and system for utilizing waste heat during ammonium paratungstate (APT) production process Download PDFInfo
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- CN102976411A CN102976411A CN2012105704628A CN201210570462A CN102976411A CN 102976411 A CN102976411 A CN 102976411A CN 2012105704628 A CN2012105704628 A CN 2012105704628A CN 201210570462 A CN201210570462 A CN 201210570462A CN 102976411 A CN102976411 A CN 102976411A
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
A method for utilizing waste heat during an ammonium paratungstate (APT) production process is characterized in that at least one first level of first heat exchanger is arranged on a tail gas outlet of a calcination rotary kiln, a second heat exchanger is arranged on an alkali pressure steam reactor, and a heat exchange medium is heated in the first heat exchanger on the tail gas outlet of the calcination rotary kiln, enters the second heat exchanger on the alkali pressure steam reactor and supplies heat for an alkali pressure steam process. The second heat exchanger can be a jacket or a coil. The method can fully utilize the heat of tail gas of various processes to supply heat for the subsequent production processes, so that the utilization efficiency of energy is increased, and energy consumption is reduced.
Description
Technical field
The present invention relates to the method and system that utilizes of waste heat in a kind of APT production process, particularly a kind of extraction process and produce the method and system that utilizes of waste heat in the APT process.
Term " extraction process is produced APT " refers to the acid system extraction process, when adopting ion exchange method, alkaline process extraction process production APT product, if the tungsten minerals calcining process is arranged in the production technique, all can adopt the bootstrap system described in the present invention, to improve efficiency of energy utilization.
Background technology
Extraction process APT production technique is produced Na take all kinds of tungsten mineralss as raw material through roasting, ore grinding, soda boiling
2WO
4Solution, purification and impurity removal, filtration solid-liquid separation, sulfuration, acid adjustment are sieved and acquisition ammonium paratungstate (APT) product except molybdenum, filtration, extraction, washing, reextraction, evaporative crystallization, filtration washing, oven dry.
Roasting process is that tungsten ore joins equably by feeding machine in ore storage bin and carries out roasting in the converter, and maturing temperature is about 500～650 ℃, sloughs beneficiation reagent and volatile matter etc.The tail gas that roasting produces, dust adopt the one-level dust-precipitator to collect dust, the secondary cooling-sedimentation, and three grades of bag collections, the level Four spray-absorption, residual air is by the chimney qualified discharge.
The roaster tail gas temperature contains a large amount of waste heats up to 300～400 ℃, and at present industrial all do not have this part of waste heat is taken full advantage of, and all is emptying after cooling and dedusting is evolved, and causes great energy dissipation.
Summary of the invention
The purpose of this invention is to provide a kind of method and system that utilizes of APT production process waste heat, it can take full advantage of the heat in each operation tail gas, for providing heat in the subsequent production process, improves efficiency of energy utilization, reduces energy consumption.
For this reason, according to an aspect of the present invention, the method of utilizing of waste heat in a kind of APT of production process is provided, it is characterized in that, in the outlet of calcination rotary kiln tail gas at least one-level the first heat exchanger is set, at the basic pressure digestion reactor the second heat exchanger is set, after heat exchange medium heats in the first heat exchanger of calcination rotary kiln tail gas outlet, enter into second heat exchanger at basic pressure digestion reactor place, be the heat supply of basic pressure digestion operation.
Preferably, second heat exchanger at basic pressure digestion reactor place is arranged in the basic pressure digestion reactor, perhaps be arranged in the chuck of basic pressure digestion reactor, or the second heat exchanger is chuck or coil pipe.
Preferably, heat exchange medium is liquid, is preferably water or thermal oil.
Preferably, between second heat exchanger at the first heat exchanger of calcination rotary kiln tail gas outlet and basic pressure digestion reactor place, one heat exchange medium transferring box is set, a snubber assembly that between two heat exchangers, circulates as heat exchange medium, preferably, described transferring box is transfer water tank or fuel tank.
Preferably, the transmission power of heating medium is industrial pump.
Preferably, the transport pipe of transferring box and each heat exchange medium all has attemperator or lagging material outward.
According to another aspect of the present invention, the system that utilizes of waste heat in a kind of APT of production process is provided, it is characterized in that, its heat exchanger is divided into the A channel of heat exchange medium and the B passage of reaction mass, the described system that utilizes comprises at least one-level the first heat exchanger, the second heat exchanger, with the heat exchange medium transferring box, the A channel entrance of the first heat exchanger is connected with the outlet of transferring box, the A channel outlet of the first heat exchanger is communicated with the A channel entrance of the second heat exchanger, the B feeder connection of the first heat exchanger is connected with the rotary kiln exhaust gas outlet, and the B channel outlet of the first heat exchanger is connected with exhaust gas processing device; The A channel outlet of the second heat exchanger is communicated with the entrance of heat exchange medium transferring box; The entrance of this heat exchange medium transferring box is communicated with the A channel outlet of the second heat exchanger.
Preferably, the entrance of the first heat exchanger A channel is connected with the transferring box outlet; The entrance of the second heat exchanger is connected with the outlet of the first heat exchanger A channel, and the outlet of the second heat exchanger links to each other with the entrance of transferring box, and/or described the second heat exchanger is chuck or coil pipe.
Preferably, the transport pipe of transferring box and each heat exchange medium all has attemperator or lagging material outward.
Preferably, in the circulation loop that calcination rotary kiln, the first heat exchanger, the second heat exchanger, heat exchange medium transferring box consist of, be provided with at least one as the pump of heating medium transmission power, described the second heat exchanger is chuck or coil pipe.
Extraction process is produced in the APT process, during the tungsten ore roasting, exhaust temperature very high (300～400 ℃), take away a large amount of heats, the basic pressure digestion operation needs solution medium is heated to high temperature (about 190 ℃), as two operations are combined, utilizes the solution system of the tail gas heating basic pressure digestion process of calcination rotary kiln, to greatly improve the utilising efficiency of the energy, reduce energy consumption.
Description of drawings
Fig. 1 is the A channel of heat exchanger and the synoptic diagram of B passage.
Fig. 2 utilizes the method synoptic diagram according to APT production process waste heat of the present invention.
Embodiment
As shown in Figure 1, heat exchanger has passage A and channel B usually.Passage A crosses thermal oil/water etc., is the passage of heat exchange medium in extraction process APT production process; And channel B is crossed wind/high-temperature tail gas, is the passage of calcination rotary kiln high-temperature tail gas or basic pressure digestion reaction mass in extraction process APT production process.
In one embodiment of the present of invention shown in Figure 2, Reference numeral 1 is illustrated in the industrial cycle pump discharge, S represents the first heat exchanger, Reference numeral 3 expression calcination rotary kiln exits the first heat exchanger A channel entrance, Reference numeral 4 expression calcination rotary kiln exit the first heat exchanger A channel outlets.Thermal oil exports from the first heat exchanger A channel entrance 3 to A channel in the middle of 4 processes that flow, and is heated by the rotary kiln high-temperature tail gas.Enter into the second heat exchanger entrance I, go out from the second heat exchanger outlet 5.The entrance of Reference numeral 7 basic pressure digestion reaction masses.The outlet of Reference numeral 8 basic pressure digestion reaction masses.The position at S place is the position of rotary kiln exhaust gas outlet, thermal oil is here heated by high-temperature tail gas, reactor itself is the second heat exchanger, reactor is just followed the thermos cup sample, there is an interlayer centre, and the thermal conductance deep fat enters from bottom I, and 5 go out from top, finish heat exchanging process, for the basic pressure digestion operation provides heat.
Reference numeral I represents the heat exchange medium entrance of basic pressure digestion reacting kettle jacketing, the heat exchange medium exit of Reference numeral 5 expression basic pressure digestion reacting kettle jacketings, the heat exchange medium entrance of Reference numeral 6 expression transferring box.
In each embodiment, heat exchange medium circulation circulation.In the first heat exchanger F, cold water/thermal oil advances, and hot water/thermal oil goes out; Hot blast advances, and cold wind goes out, and finishes heat transfer process.And described the second heat exchanger is exactly reactor itself, and one of them passage A (chuck/coil pipe) is that hot water/thermal oil advances, and cold water/thermal oil goes out, and conducts heat to material in reactor by the reactor wall, for chemical reaction provides heat.Its channel B is exactly the access way of reactor internal reaction material.
In one embodiment of the invention, start transferpump, heat exchange medium pumps into rotary kiln heat exchanger entrance 3 from transferring box outlet 1, rear from exporting 4 to reacting kettle jacketing entrance 5 by the high-temperature tail gas heating in the first heat exchanger S, be the heat supply of basic pressure digestion reaction process, after in chuck, conducting heat, from the outlet 5 of the heat exchange medium of basic pressure digestion reacting kettle jacketing out, turn back to the transferring box from the heat exchange medium entrance 6 of transferring box, finish a circulation.
According to one embodiment of present invention, in rotary kiln exhaust gas pipe exit heat exchanger is set, can establish one-level or two-stage heat exchanger, if the benefit of secondary is that the ratio one-level that the temperature of heat-transfer medium can be improved is higher, has better heat transfer effect, that is to say two heat exchanger in series, heat exchanger can adopt shell and tube, spiral plate type or other types, as long as can be effective;
Outside weldings one chuck at reactor forms an integral body with reactor, and chuck is established an entrance and an outlet, the high temperature heat exchange medium enters from entrance, from exporting out, heat is passed to reactor internal reaction medium by the reactor wall, for the chemical reaction that occurs in the reactor provides heat.
Reacting kettle jacketing also can be arranged to coil tube type, being about to a steel pipe (metal tube) cuts open, the dish curl is welded on the reactor wall, the benefit of coil tube type is to improve the intensity of reactor, because be welded on the effect that coil pipe on the reactor wall can play reinforcement, heat-transfer medium flows in coil pipe, by the reactor wall with the reaction medium in the heat transferred reactor.Certainly, coil pipe also can be welded in the reactor as required.Chuck or coil pipe all have insulation outward.
Claims (10)
1. method of utilizing of producing waste heat in the APT process, it is characterized in that, in the outlet of calcination rotary kiln tail gas at least one-level the first heat exchanger is set, at the basic pressure digestion reactor the second heat exchanger is set, after heat exchange medium heats in the first heat exchanger of calcination rotary kiln tail gas outlet, enter into second heat exchanger at basic pressure digestion reactor place, be the heat supply of basic pressure digestion operation.
Waste heat as claimed in claim 1 utilize method, it is characterized in that described the second heat exchanger is chuck or coil pipe.
3. such as the method for utilizing of claim 1 and 2 described waste heats, it is characterized in that heat exchange medium is liquid, be preferably water or thermal oil.
4. such as the method for utilizing of one of them described waste heat of claims 1 to 3, it is characterized in that, between second heat exchanger at the first heat exchanger of calcination rotary kiln tail gas outlet and basic pressure digestion reactor place, one heat exchange medium transferring box is set, a snubber assembly that between two heat exchangers, circulates as heat exchange medium, preferably, described transferring box is transfer water tank or fuel tank.
5. such as the method for utilizing of one of them described waste heat of claim 1 to 4, it is characterized in that the transmission power of heating medium is industrial pump.
6. such as the method for utilizing of one of them described waste heat of claim 1 to 5, it is characterized in that the transport pipe of transferring box and each heat exchange medium all has attemperator or lagging material outward.
7. system that utilizes that produces waste heat in the APT process, it is characterized in that, its heat exchanger is divided into the A channel of heat exchange medium and the B passage of reaction mass, the described system that utilizes comprises at least one-level the first heat exchanger, the second heat exchanger, with the heat exchange medium transferring box, the A channel entrance of the first heat exchanger is connected with the outlet of transferring box, the A channel outlet of the first heat exchanger is communicated with the A channel entrance of the second heat exchanger, the B feeder connection of the first heat exchanger is connected with the rotary kiln exhaust gas outlet, and the B channel outlet of the first heat exchanger is connected with exhaust gas processing device; The A channel outlet of the second heat exchanger is communicated with the entrance of heat exchange medium transferring box; The entrance of this heat exchange medium transferring box is communicated with the A channel outlet of the second heat exchanger.
Waste heat as claimed in claim 7 utilize system, it is characterized in that the entrance of the first heat exchanger A channel is connected with the transferring box outlet; The entrance of the second heat exchanger is connected with the outlet of the first heat exchanger A channel, and the outlet of the second heat exchanger links to each other with the entrance of transferring box, and/or described the second heat exchanger is chuck or coil pipe.
Waste heat as claimed in claim 7 utilize system, it is characterized in that the transport pipe of transferring box and each heat exchange medium all has attemperator or lagging material outward.
10. waste heat as claimed in claim 7 utilizes system, it is characterized in that, in the circulation loop that calcination rotary kiln, the first heat exchanger, the second heat exchanger, heat exchange medium transferring box consist of, be provided with at least one as the pump of heating medium transmission power, described the second heat exchanger is chuck or coil pipe.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105704628A CN102976411A (en) | 2012-12-25 | 2012-12-25 | Method and system for utilizing waste heat during ammonium paratungstate (APT) production process |
| CN201510263627.0A CN104909408B (en) | 2012-12-25 | 2012-12-25 | Produce Application way and the system of waste heat in APT process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105704628A CN102976411A (en) | 2012-12-25 | 2012-12-25 | Method and system for utilizing waste heat during ammonium paratungstate (APT) production process |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510263627.0A Division CN104909408B (en) | 2012-12-25 | 2012-12-25 | Produce Application way and the system of waste heat in APT process |
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| CN102976411A true CN102976411A (en) | 2013-03-20 |
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| CN201510263627.0A Expired - Fee Related CN104909408B (en) | 2012-12-25 | 2012-12-25 | Produce Application way and the system of waste heat in APT process |
| CN2012105704628A Pending CN102976411A (en) | 2012-12-25 | 2012-12-25 | Method and system for utilizing waste heat during ammonium paratungstate (APT) production process |
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| CN201510263627.0A Expired - Fee Related CN104909408B (en) | 2012-12-25 | 2012-12-25 | Produce Application way and the system of waste heat in APT process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921090A (en) * | 2016-06-02 | 2016-09-07 | 赵正芳 | Reaction kettle |
| CN108728638A (en) * | 2018-09-12 | 2018-11-02 | 江钨世泰科钨品有限公司 | A kind of utilization method and system of Tungsten smelting autoclaving process waste heat |
| CN110252230A (en) * | 2019-06-20 | 2019-09-20 | 江钨世泰科钨品有限公司 | A kind of afterheat utilizing system in APT production process |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110201620A (en) * | 2019-06-20 | 2019-09-06 | 江钨世泰科钨品有限公司 | A kind of utilization method of waste heat in APT production process |
Citations (2)
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| CN101182039A (en) * | 2007-12-07 | 2008-05-21 | 金堆城钼业股份有限公司 | Crystallization method of ammonium paratungstate |
| CN101643245A (en) * | 2008-08-05 | 2010-02-10 | 江西稀有稀土金属钨业集团有限公司 | Process for preparing high-purity ammonium paratungstate |
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| US3077379A (en) * | 1960-10-19 | 1963-02-12 | Union Carbide Corp | Preparation of ammonium paratungstate |
| US7794686B2 (en) * | 2008-08-12 | 2010-09-14 | Tdy Industries, Inc. | Method for making ammonium metatungstate |
| CN102674460B (en) * | 2012-05-11 | 2014-04-30 | 江西稀有金属钨业控股集团有限公司 | Preparation method for high-purity ammonium paratungstate |
| CN203065176U (en) * | 2012-12-25 | 2013-07-17 | 江西稀有金属钨业控股集团有限公司 | Residual heat utilization system in process of producing APT (ammonium paratungstate) |
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2012
- 2012-12-25 CN CN201510263627.0A patent/CN104909408B/en not_active Expired - Fee Related
- 2012-12-25 CN CN2012105704628A patent/CN102976411A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182039A (en) * | 2007-12-07 | 2008-05-21 | 金堆城钼业股份有限公司 | Crystallization method of ammonium paratungstate |
| CN101643245A (en) * | 2008-08-05 | 2010-02-10 | 江西稀有稀土金属钨业集团有限公司 | Process for preparing high-purity ammonium paratungstate |
Non-Patent Citations (2)
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| 李天恩: "现代钨湿法冶炼厂工艺设备评述", 《稀有金属与硬质合金》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921090A (en) * | 2016-06-02 | 2016-09-07 | 赵正芳 | Reaction kettle |
| CN108728638A (en) * | 2018-09-12 | 2018-11-02 | 江钨世泰科钨品有限公司 | A kind of utilization method and system of Tungsten smelting autoclaving process waste heat |
| CN110252230A (en) * | 2019-06-20 | 2019-09-20 | 江钨世泰科钨品有限公司 | A kind of afterheat utilizing system in APT production process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104909408A (en) | 2015-09-16 |
| CN104909408B (en) | 2016-07-27 |
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Application publication date: 20130320 |