CN203577362U - Energy-saving type crystallizer used for melamine device - Google Patents
Energy-saving type crystallizer used for melamine device Download PDFInfo
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- CN203577362U CN203577362U CN201320806143.2U CN201320806143U CN203577362U CN 203577362 U CN203577362 U CN 203577362U CN 201320806143 U CN201320806143 U CN 201320806143U CN 203577362 U CN203577362 U CN 203577362U
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- heat
- crystallizer
- heat exchanger
- main body
- melamine
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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
- Y02P20/50—Improvements relating to the production of bulk chemicals
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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
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Abstract
The utility model discloses an energy-saving type crystallizer used for a melamine device and mainly solves the problems that all existing crystallizers do not take any effective measures to recover cooling heat of reaction hot materials and heat generated by the transformation of melamine from a gas phase into a solid phase, or convert production waste heat into low-grade heat for recovery. The energy-saving type crystallizer comprises a crystallizer main body (1), and is characterized by also comprising a heat exchange system which carries out heat exchange on boiler feed water and mixed gas of melamine-containing products, and a steam-water separator (2) which is connected with the heat exchange system and separates out saturated steam from the boiler feed water after the heat exchange. The energy-saving type crystallizer disclosed by the utility model directly brings out the cooling heat of high-temperature hot materials and the phase change heat of the melamine by using the boiler feed water, and produces the 1.6-4.0MPa saturated steam (high grade) in a steam drum so as to be utilized, so that economic benefits are considerable, and the thermal pollution and the fuel consumption are reduced.
Description
Technical field
The utility model relates to a kind of crystallizer, specifically, relates to a kind of energy-saving crystallizer for melamine plant.
Background technology
Waste heat recovery comprises high-temp waste gas waste heat, cooling medium waste heat, waste vapour waste water residual heat, high-temperature product and afterheat of slags, chemical reaction waste heat, combustible exhaust gas waste liquid and waste material waste heat etc.According to investigation, the waste heat total resources of every profession and trade account for 17% to 67% of its fuel consumption total amount, and the residual heat resources of recoverable are about 60% of waste heat total resources.One of approach that waste heat recovery is energy-saving and emission-reduction, reduce production costs.Yet, at present in gas phase quenching method Melamine Production Technology, any effective measures of all not taking crystallizer reclaim reaction heat material cooling heat and melamine changes by gas phase the heat that solid phase produces into, but simply with high-power circulating cold air blower fan, take heat out of crystallizer, utilize cooling air mode that heat is entered to atmosphere, environment is caused to thermal pollution; Or, production waste heat is converted to low level recuperation of heat, its rate of recovery and value are all extremely low.
Utility model content
The purpose of this utility model is to overcome above-mentioned defect, and a kind of simple in structure, reasonable in design, energy-efficient energy-saving crystallizer for melamine plant is provided.
To achieve these goals, the technical solution adopted in the utility model is as follows:
A kind of energy-saving crystallizer for melamine plant, comprise crystallizer main body, also comprise the heat-exchange system that carries out heat exchange by boiler feedwater and the mist that contains melamine product, and be connected with this heat-exchange system and the boiler feedwater from heat exchange in isolate the steam-water separator of saturated vapor.
In the utility model, heat-exchange system adopts three kinds of schemes to realize the collection to waste heat:
One
Described heat-exchange system comprises and is positioned at crystallizer main body outside for receiving the mist that contains melamine product the First Heat Exchanger being communicated with crystallizer main body, is built in second heat exchanger on crystallizer main body top; Described First Heat Exchanger is all connected with steam-water separator with the second heat exchanger, and the boiler feedwater of the two inside after heat exchange enters steam-water separator and isolate saturated vapor.
They are two years old
The mist that contains melamine product is delivered in crystallizer main body by pipeline; Described heat-exchange system comprises the First Heat Exchanger that is built in crystallizer main body top, is positioned at the second heat exchanger that crystallizer main body outside and lower end are connected with First Heat Exchanger; First Heat Exchanger is all connected with steam-water separator with the second heat exchanger, and the boiler feedwater of the two inside after heat exchange enters steam-water separator and isolate saturated vapor; The lower end of the second heat exchanger is also connected with cold fluid pipe and powder outlet, and wherein, cold fluid pipe is communicated with crystallizer main body, and powder outlet is communicated with described gas inlet tube.
Further, the junction of described pipeline and cold fluid pipe and crystallizer main body is positioned at same level, after gas inlet tube and cold fluid pipe cross, is communicated with crystallizer main body.
They are three years old
Described heat-exchange system comprises First Heat Exchanger and the second heat exchanger that is set in turn in crystallizer body interior from top to bottom; Described First Heat Exchanger is all connected with steam-water separator with the second heat exchanger, and the boiler feedwater of the two inside after heat exchange enters steam-water separator and isolate saturated vapor.
Compared with prior art, the beneficial effects of the utility model are:
(1) the utility model is not only simple in structure, reasonable in design, and with low cost, realization convenience.
(2) the utility model is directly lowered the temperature high temperature thermal material heat and the heat exchange of the melamine heat of transformation to boiler feedwater by heat-exchange system, then by steam-water separator, boiler feedwater is taken out of and in drum, produced 1.6 to 4.0MPa saturated vapors (high-grade) and isolate and be used, not only organic efficiency is high, economic benefits, and effectively reduces thermal pollution and fuel consumption.
(3) the utility model compared with prior art, not only possesses novelty and creativeness, possesses very high practicality and the market competitiveness, for it, applies on a large scale, has established solid foundation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model-embodiment 1.
Fig. 2 is the structural representation of the utility model-embodiment 2.
Fig. 3 is the structural representation of the utility model-embodiment 3.
Wherein, the corresponding title of Reference numeral: 1-crystallizer main body, 2-steam-water separator, 3-First Heat Exchanger, 4-the second heat exchanger, 5-pipeline, 6-powder outlet, 7-cold fluid pipe.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.Embodiment of the present utility model includes but not limited to the following example.
As shown in Figure 1, the present embodiment provides a kind of energy-saving crystallizer for melamine plant, this energy-saving crystallizer comprises crystallizer main body 1, crystallizer main body can be selected existing crystallizer, be with the difference of prior art, the present embodiment also, on the basis of crystallizer main body, has been set up heat-exchange system, and be connected with heat-exchange system and the boiler feedwater from heat exchange in isolate the steam-water separator 2 of saturated vapor.Wherein, the water supply of heat-exchange system is provided by the feed water system of boiler, and the water source that provides heat exchange to use to heat-exchange system is provided for it, and its structure and operation principle are existing mature technology, do not repeat them here.
In the present embodiment, heat-exchange system comprises and is positioned at crystallizer main body 1 outside for receiving the mist that contains melamine product the First Heat Exchanger 3 being communicated with crystallizer main body 1, is built in second heat exchanger 4 on crystallizer main body 1 top; Described First Heat Exchanger 3 is all connected with steam-water separator 2 with the second heat exchanger 4, and the boiler feedwater of the two inside after heat exchange enters steam-water separator 2 and isolate saturated vapor.
Based on said structure, the course of work of the present utility model is as follows: 380 ℃ of gaseous mixtures that contain melamine amine product ﹙ gas state ﹚ enter First Heat Exchanger, before entering First Heat Exchanger, adopt the solid circle crystal of approximately 170 ℃～210 ℃ of temperature that mixture temperature is down to 290 ℃～320 ℃; Mist is carrying out heat exchange with boiler feedwater after preheating in First Heat Exchanger, goes out approximately 170 ℃～210 ℃ of the temperature of charge of First Heat Exchanger, then enters crystallizer, and in temperature decline process, gaseous state melamine changes into solid-state.Crystallizer internal solid melamine is separated with other mists, and solid melamine product is gone out and entered packaging system from crystallizer bottom.Mist rises in crystallizer, by the second heat exchanger and 103 ℃, top boiler feedwater indirect heat exchange, approximately 140 ℃～170 ℃ of temperature when gas goes out crystallizer top.Boiler feedwater in First Heat Exchanger and the second heat exchanger after heat exchange enters steam-water separator, produces the saturated vapor of 1.0～4.0MPa in steam-water separator, and steam output is recycled.
As shown in Figure 2, the difference of the present embodiment and embodiment 1 is, the mist that contains melamine product is delivered in crystallizer main body 1 by pipeline 5; Meanwhile, heat-exchange system comprises the First Heat Exchanger 3 that is built in crystallizer main body 1 top, is positioned at the second heat exchanger 4 that crystallizer main body 1 outside and lower end are connected with First Heat Exchanger 3; First Heat Exchanger 3 is all connected with steam-water separator 2 with the second heat exchanger 4, and the boiler feedwater of the two inside after heat exchange enters steam-water separator 2 and isolate saturated vapor; The lower end of the second heat exchanger 4 is also connected with cold fluid pipe 7 and powder outlet 6, and wherein, cold fluid pipe 7 is communicated with crystallizer main body 1, and powder outlet 6 is communicated with pipeline 5.As a kind of optimal way, pipeline 5 and cold fluid pipe 7 are positioned at same level with the junction of crystallizer main body 1; Cold fluid pipe 7 is near crystallizer main body 1.
Based on said structure, the course of work of the present utility model is as follows: the mist that contains melamine product is delivered in crystallizer main body 1 by pipeline 5, simultaneously, after mixing, the cold fluid getting off with crystallizer top and powder enter crystallizer, gaseous state melamine is lowered the temperature by First Heat Exchanger, and in temperature-fall period, in crystallizer, changing solid into, approximately 210 ℃～230 ℃ products out enter packaging system from crystallizer bottom.Mist rise with First Heat Exchanger in boiler feedwater heat exchange, temperature is down to 170 ℃～190 ℃, then with the second heat exchanger in 103 ℃ of boiler feedwater heat exchange, the mist temperature that goes out crystallizer top is about 140 ℃～170 ℃.Boiler feedwater through heat exchange changes the recycling of 1.0～4.0MPa saturated vapor in steam-water separator.
As shown in Figure 3, the difference of the present embodiment and embodiment 1 and embodiment 2 is, heat-exchange system comprises First Heat Exchanger 3 and the second heat exchanger 4 that is set in turn in crystallizer main body 1 inside from top to bottom; First Heat Exchanger 3 is all connected with steam-water separator 2 with the second heat exchanger 4, and the boiler feedwater of the two inside after heat exchange enters steam-water separator 2 and isolate saturated vapor.
Based on said structure, the course of work of the present utility model is as follows: the gaseous mixture of 380 ℃ that contains melamine gaseous product enters crystallizer from crystallizer top, mixed airflow from top to down, successively with First Heat Exchanger, the second heat exchanger indirect heat exchange, boiler feedwater in First Heat Exchanger and the second heat exchanger is after heat exchange absorbs heat, mixture temperature drops to 140 ℃～170 ℃ left and right by 380 ℃, gaseous state melamine crystallization changes into solid-state, the gaseous mixture of entrained solids melamine is gone out from crystallizer bottom, Gu enter next gas-separation equipment, melamine solid product enters packaging system.
Boiler feedwater after heat exchange enters the saturated vapor recycling that steam-water separator produces 1.0MPa～4.0MPa.
According to above-described embodiment, just can realize well the utility model.What deserves to be explained is; under prerequisite based on above-mentioned design principle; for solving same technical problem; even if some that make on architecture basics disclosed in the utility model are without substantial change or polishing; the essence of the technical scheme adopting is still the same with the utility model, therefore it also should be in protection domain of the present utility model.
Claims (6)
1. the energy-saving crystallizer for melamine plant, comprise crystallizer main body (1), it is characterized in that, also comprise the heat-exchange system that carries out heat exchange by boiler feedwater and the mist that contains melamine product, and be connected with this heat-exchange system and the boiler feedwater from heat exchange in isolate the steam-water separator (2) of saturated vapor.
2. a kind of energy-saving crystallizer for melamine plant according to claim 1, it is characterized in that, described heat-exchange system comprises that being positioned at crystallizer main body (1) outside is used for receiving the mist that contains melamine product the First Heat Exchanger (3) being communicated with crystallizer main body (1), is built in second heat exchanger (4) on crystallizer main body (1) top; Described First Heat Exchanger (3) is all connected with steam-water separator (2) with the second heat exchanger (4), and the boiler feedwater of the two inside after heat exchange enters steam-water separator (2) and isolate saturated vapor.
3. a kind of energy-saving crystallizer for melamine plant according to claim 1, is characterized in that, the mist that contains melamine product is delivered in crystallizer main body (1) by pipeline (5); Described heat-exchange system comprises the First Heat Exchanger (3) that is built in crystallizer main body (1) top, is positioned at the second heat exchanger (4) that crystallizer main body (1) outside and lower end are connected with First Heat Exchanger (3); First Heat Exchanger (3) is all connected with steam-water separator (2) with the second heat exchanger (4), and the boiler feedwater of the two inside after heat exchange enters steam-water separator (2) and isolate saturated vapor; The lower end of the second heat exchanger (4) is also connected with cold fluid pipe (7) and powder outlet (6), and wherein, cold fluid pipe (7) is communicated with crystallizer main body (1), and powder outlet (6) is communicated with described pipeline (5).
4. a kind of energy-saving crystallizer for melamine plant according to claim 3, it is characterized in that, the junction of described pipeline (5) and cold fluid pipe (7) and crystallizer main body (1) is positioned at same level, and pipeline (5) and cold fluid pipe (7) are communicated with crystallizer main body (1) after crossing.
5. a kind of energy-saving crystallizer for melamine plant according to claim 3, is characterized in that, described cold fluid pipe (7) is near crystallizer main body (1), and powder outlet (6) is away from crystallizer main body (1).
6. a kind of energy-saving crystallizer for melamine plant according to claim 1, is characterized in that, described heat-exchange system comprises First Heat Exchanger (3) and the second heat exchanger (4) that is set in turn in crystallizer main body (1) inside from top to bottom; Described First Heat Exchanger (3) is all connected with steam-water separator (2) with the second heat exchanger (4), and the boiler feedwater of the two inside after heat exchange enters steam-water separator (2) and isolate saturated vapor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806143.2U CN203577362U (en) | 2013-12-10 | 2013-12-10 | Energy-saving type crystallizer used for melamine device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806143.2U CN203577362U (en) | 2013-12-10 | 2013-12-10 | Energy-saving type crystallizer used for melamine device |
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| CN203577362U true CN203577362U (en) | 2014-05-07 |
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| CN201320806143.2U Expired - Fee Related CN203577362U (en) | 2013-12-10 | 2013-12-10 | Energy-saving type crystallizer used for melamine device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235810A (en) * | 2014-09-08 | 2014-12-24 | 山东省舜天化工集团有限公司 | Heat energy recovery device for heat energy produced based on melamine |
| CN104292173A (en) * | 2014-09-08 | 2015-01-21 | 山东省舜天化工集团有限公司 | Melamine crystallizer-based gas heat recovery method |
-
2013
- 2013-12-10 CN CN201320806143.2U patent/CN203577362U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235810A (en) * | 2014-09-08 | 2014-12-24 | 山东省舜天化工集团有限公司 | Heat energy recovery device for heat energy produced based on melamine |
| CN104292173A (en) * | 2014-09-08 | 2015-01-21 | 山东省舜天化工集团有限公司 | Melamine crystallizer-based gas heat recovery method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20171210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |