CN202778509U - Device for carrying out molecular sieve regeneration treatment by using waste heat of synthesis ammonia - Google Patents
Device for carrying out molecular sieve regeneration treatment by using waste heat of synthesis ammonia Download PDFInfo
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- CN202778509U CN202778509U CN2012204368983U CN201220436898U CN202778509U CN 202778509 U CN202778509 U CN 202778509U CN 2012204368983 U CN2012204368983 U CN 2012204368983U CN 201220436898 U CN201220436898 U CN 201220436898U CN 202778509 U CN202778509 U CN 202778509U
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- molecular sieve
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- drier
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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
The utility model provides a device for carrying out molecular sieve regeneration treatment by using waste heat of synthesis ammonia. The device comprises a synthesis tower, a preheater, a heat exchanger and a drier, wherein the preheater and the heat exchanger are connected with the outlet of the synthesis tower; the drier is used for absorbing synthesis gas; a synthesis gas input pipeline is divided and communicated with the drier through a way valve and a regeneration heater controlled by a heating valve; a temperature adjusting valve is arranged on a connecting pipeline of the regeneration heater and the heat exchanger; the outlet of the synthesis tower is connected with the regeneration heater; the input ends of the way valve, the temperature adjusting valve and the heating valve are respectively and electrically connected with the output end of a time controller. The heat at the outlet of the synthesis tower is recycled and used as a heat source for the generation of a molecular sieve, the absorption and drying performances of the molecular sieve are ensured better, the service life of catalyst is prolonged, the synthesis efficiency of the synthesis ammonia is improved, and moreover the constant operation of synthesis ammonia equipment is ensured, and the energy consumption on waste heat treatment is reduced.
Description
Technical field
The utility model relates to a kind of regenerating treater of molecular sieve, relates in particular to a kind of synthetic ammonia waste heat that utilizes and carries out the device that regenerating molecular sieve is processed.
Background technology
Molecular sieve is a kind of alumino-silicate, is to connect to form spacious skeleton structure by sial by oxo bridge, makes the molecule of different size shape separately, until the effect of screening molecule, thereby be called molecular sieve.It is mainly used in the depth drying of various gases, liquid, the separation of gas, liquid and purification, catalyst carrier etc.
In ammonia synthesis reaction, need to pass into the synthesis gas such as hydrogen, nitrogen in the synthetic tower and react synthetic ammonia by catalyst.Owing to iron is that catalyst chance oxygen (such as CO, CO2 and H20 etc.) can the generation oxidation reaction reduce its catalytic action; So synthesis gas will use molecular sieve that the gas ingredients of catalyst oxidation will be removed before reacting entering synthetic tower.The operation mechanism of molecular sieve is cryogenic absorption, high temperature regeneration, i.e. CO, the CO in the selective absorption synthesis gas at low temperatures
2And H
20, and then utilize the above high temperature of 300 degree to heat to remove the material that is adsorbed and reach the molecular sieve flash regeneration.
Under traditional handicraft in the past, the calorific value of molecular sieve heat source does not far reach designing requirement, when this just causes regenerating molecular sieve, and the CO of its absorption, CO
2And H
20 flash distillation is not out from molecular sieve fully.If things go on like this, certainly will cause the decay of the absorption property of molecular sieve and mechanical performance and aging, temporary poisoning occur and need synthetic tower by-pass valve to shut and want the open cycle valve to keep the phenomenon of synthetic tower temperature thereby cause catalyst in the synthetic tower.If so low problem of untimely solution regenerating molecular sieve outlet temperature, above-mentioned condition will appear repeatedly, whole synthesis ammonia system all can be restricted, if and the temporary poisoning repeatedly of the catalyst of synthetic tower, will cause the serious consequence such as combined coefficient decline, synthesis pressure rising of synthetic ammonia.
In addition, because ammonia synthesis reaction is exothermic reaction, the heat of synthetic tower outlet is high, so could discharge after needing condenser to process, has not only increased the energy of equipment and condensation process, has also caused the waste of resource.
The utility model content
The purpose of this utility model will solve above-mentioned deficiency exactly, provides a kind of synthetic ammonia waste heat that utilizes to carry out the device that regenerating molecular sieve is processed, and reaches molecular sieve and utilizes the waste heat of synthetic ammonia to regenerate in ammonia synthesis reaction, and carry out simultaneously the purpose of adsorption treatment.
In order to achieve the above object, the utility model provides a kind of synthetic ammonia waste heat that utilizes to carry out the device that regenerating molecular sieve is processed, comprise synthetic tower, the preheater, the heat exchanger that are connected with the synthetic tower outlet, and the drier that synthesis gas is adsorbed, described synthesis gas input channel is divided into two pipelines and leads to drier, and a pipeline is connected with drier by the road valve, and another pipeline is connected with drier by the regenerative heater that is provided with heating valve control; The connecting pipe of described regenerative heater and heat exchanger is provided with temperature control valve (TCV); Described synthetic tower outlet is connected with regenerative heater by pipeline; The input of described road valve, temperature control valve (TCV), heating valve is electrically connected with the output of time controller respectively.
In order to make things convenient for the maintenance of temperature control valve (TCV), the pipeline between described regenerative heater and the synthetic tower outlet is provided with stop valve, also is provided with stop valve on the pipeline between described temperature control valve (TCV) and the heat exchanger.
Pipeline between described regenerative heater and the temperature control valve (TCV) is provided with showering guilding valve, and showering guilding valve can be used as pressure relief opening and displacement mouth, makes things convenient for the displacement of temperature control valve (TCV).
Be connected owing to the outlet of synthetic tower is carried out pipeline with regenerative heater in this device, so that the amount of heat that produces in the ammonia synthesis reaction has entered regenerative heater, avoided the waste of heat and equipment and the electric energy of these heat energy of cooling; The utility model is controlled the open and close of road valve, heating valve and temperature control valve (TCV) by time controller, when molecular sieve adsorption is saturated in drier wherein, time controller in time closes cut-off valve, and open heating valve and temperature control valve (TCV), making synthesis gas be introduced into regenerative heater heats, intensification enters in the drier when reaching the temperature of regenerating molecular sieve carries out thermal regeneration to molecular sieve, and another drier carries out adsorption treatment to synthesis gas simultaneously, for ammonia synthesis reaction.The thermal regeneration of molecular sieve guarantees absorption, the drying property of molecular sieve, and gets rid of oxygen-containing gas and moisture in the synthesis gas, has guaranteed the performance of catalyst in the ammonia synthesis reaction, improves the combined coefficient of synthetic ammonia.After regenerating molecular sieve finishes, time controller is closed heating valve and temperature control valve (TCV), open simultaneously the road valve, synthesis gas is directly led in the drier carry out adsorption treatment, the synthesis gas after the processing improves to enter behind the pressure by compressor and carries out ammonia synthesis reaction in the synthetic tower.Wherein stop valve controlled better synthesis gas flow, make things convenient for the maintenance of temperature control valve (TCV); Showering guilding valve can be used as pressure relief opening and displacement mouth, convenient displacement.
The beneficial effects of the utility model have:
1, the utility model has applicability to all kinds of operating modes in the ammonia synthesis reaction, even in the lower situation of ammonia synthesizer load, export the requirement that the heat that provides still can be used as the regenerating molecular sieve thermal source by synthetic tower.
2, adopt two drier parallel connections in the utility model, the molecular sieve normal operation is carried out adsorption treatment to pernicious gas in the synthesis gas in the drier; Molecular sieve carries out the thermal regeneration processing simultaneously in the another drier; Two mutual alternations of drier and regeneration have guaranteed the continuous operation of ammonia synthesis unit.
3, synthesis gas participates in still getting back to the reaction that participates in synthetic ammonia in the synthetic tower behind the regenerating molecular sieve in the utility model, reaches the comprehensive utilization of energy, component, and has reduced equipment and cost that regenerating molecular sieve is processed.
4, the utility model is recycled the heat of synthetic tower outlet, and reduces energy consumption is processed in the cooling of used heat.
5, reduce the moisture in the synthesis gas, avoided synthetic band of gas water to cause compressor drum impaired; And the CO in the synthesis gas, CO have been reduced
2Deng the pernicious gas composition, catalyst is not subjected to the harm of oxygenatedchemicals in the protection synthetic tower, has prolonged the service life of catalyst.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 realizes device schematic diagram of the present utility model.
Among the figure: 1-compressor, 2-heat exchanger, 3-synthetic tower, 4-condenser, 5-preheater, 6-regenerative heater, 7-time controller, 8,8 '-stop valve, 9-temperature control valve (TCV), 10-drier, 11-heating valve, 12-road valve, 13-showering guilding valve.
The specific embodiment
Shown in Figure 1 is device of the present utility model, comprises synthetic tower 3, the preheater 5, the heat exchanger 2 that are connected with synthetic tower 3 outlet, and the drier 10 that synthesis gas is adsorbed; After described synthesis gas input channel is divided into two pipelines and leads to drier 10 and carry out adsorption treatment, compressed machine 1, heat exchanger 2 enter synthetic tower 3 and carry out ammonia synthesis reaction again, wherein a pipeline is connected with drier 10 by road valve 12, and another pipeline is connected with drier 10 by the regenerative heater 6 that is provided with heating valve 11 controls; Described regenerative heater 6 is provided with temperature control valve (TCV) 9 with the connecting pipe of heat exchanger 2; Described synthetic tower 3 outlets are connected with regenerative heater 6 by pipeline; The input of described road valve 12, temperature control valve (TCV) 9, heating valve 11 is electrically connected with the output of time controller 7 respectively.Discharging after the waste heat of described preheater 5, regenerative heater 6 enters condenser 4 after by heat exchanger 2 heat exchanges further cooling is processed.
Pipeline between described regenerative heater 6 and synthetic tower 3 outlets is provided with stop valve 8, also is provided with stop valve 8 ' on the pipeline between described temperature control valve (TCV) 9 and the heat exchanger 2.Pipeline between described regenerative heater 6 and the temperature control valve (TCV) 9 is provided with showering guilding valve 13, and showering guilding valve can be used as pressure relief opening and displacement mouth, makes things convenient for the displacement of temperature control valve (TCV).
In this device, when molecular sieve was normal, synthesis gas directly entered drier and carries out adsorption treatment, and then compressed machine, heat exchanger enter synthetic tower and carry out ammonia synthesis reaction.Because molecular sieve is got rid of CO in the synthesis gas, CO
2Deng pernicious gas composition and moisture, guaranteed the performance of catalyst in the ammonia synthesis reaction, prolong the service life of catalyst, and improved the combined coefficient of synthetic ammonia.
When the fractionated molecule sieve absorption of drier middle part is saturated, need to regenerate timely to molecular sieve and process absorption property and the mechanical performance that improves molecular sieve to reach, avoid the intoxicating phenomenon of catalyst in the ammonia synthesis reaction, also avoided the waste of heat and equipment and the electric energy of these heat energy of cooling.This device carries out pipeline with the outlet of synthetic tower with regenerative heater and is connected, so that the amount of heat that produces in the ammonia synthesis reaction enters in the regenerative heater thermal source as regenerating molecular sieve.This device is controlled the open and close of road valve, heating valve and temperature control valve (TCV) by time controller, when molecular sieve adsorption is saturated in drier wherein, time controller in time closes cut-off valve, and open heating valve and temperature control valve (TCV), making synthesis gas be introduced into regenerative heater heats, intensification enters in the drier when reaching the temperature of regenerating molecular sieve again carries out thermal regeneration to molecular sieve, and another drier carries out adsorption treatment to synthesis gas simultaneously, for ammonia synthesis reaction.After regenerating molecular sieve finishes, time controller is closed heating valve and temperature control valve (TCV), open simultaneously the road valve, synthesis gas is directly led in the drier carry out adsorption treatment, the synthesis gas after the processing improves to enter behind the pressure by compressor and carries out ammonia synthesis reaction in the synthetic tower.Wherein stop valve controlled better synthesis gas flow, make things convenient for the maintenance of temperature control valve (TCV); Showering guilding valve can be used as pressure relief opening and displacement mouth, convenient displacement.
Above embodiment is not limited only to protection domain of the present utility model, and all are based on basic thought of the present utility model and all belonging in the protection domain of the present utility model of making amendment or change.
Claims (3)
1. one kind is utilized the synthetic ammonia waste heat to carry out the device that regenerating molecular sieve is processed, comprise synthetic tower, the preheater, the heat exchanger that are connected with the synthetic tower outlet, and the drier that synthesis gas is adsorbed, it is characterized in that: described synthesis gas input channel is divided into two pipelines and leads to drier, article one, pipeline is connected with drier by the road valve, and another pipeline is connected with drier by the regenerative heater that is provided with heating valve control; The connecting pipe of described regenerative heater and heat exchanger is provided with temperature control valve (TCV); Described synthetic tower outlet is connected with regenerative heater by pipeline; The input of described road valve, temperature control valve (TCV), heating valve is electrically connected with the output of time controller respectively.
2. device according to claim 1 is characterized in that: the pipeline between described regenerative heater and the synthetic tower outlet is provided with stop valve, also is provided with stop valve on the pipeline between described temperature control valve (TCV) and the heat exchanger.
3. device according to claim 1, it is characterized in that: the pipeline between described regenerative heater and the temperature control valve (TCV) is provided with showering guilding valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204368983U CN202778509U (en) | 2012-08-30 | 2012-08-30 | Device for carrying out molecular sieve regeneration treatment by using waste heat of synthesis ammonia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204368983U CN202778509U (en) | 2012-08-30 | 2012-08-30 | Device for carrying out molecular sieve regeneration treatment by using waste heat of synthesis ammonia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202778509U true CN202778509U (en) | 2013-03-13 |
Family
ID=47805854
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204368983U Expired - Fee Related CN202778509U (en) | 2012-08-30 | 2012-08-30 | Device for carrying out molecular sieve regeneration treatment by using waste heat of synthesis ammonia |
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| CN (1) | CN202778509U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872845A (en) * | 2012-08-30 | 2013-01-16 | 安徽淮化股份有限公司 | Method and device for regenerating molecular sieve by using waste heat of synthesis ammonia |
| CN103193250A (en) * | 2013-03-21 | 2013-07-10 | 安徽淮化股份有限公司 | Process device of liquid nitrogen washing and methanol washing |
-
2012
- 2012-08-30 CN CN2012204368983U patent/CN202778509U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872845A (en) * | 2012-08-30 | 2013-01-16 | 安徽淮化股份有限公司 | Method and device for regenerating molecular sieve by using waste heat of synthesis ammonia |
| CN103193250A (en) * | 2013-03-21 | 2013-07-10 | 安徽淮化股份有限公司 | Process device of liquid nitrogen washing and methanol washing |
| CN103193250B (en) * | 2013-03-21 | 2015-06-17 | 安徽淮化股份有限公司 | Process device of liquid nitrogen washing and methanol washing |
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Legal Events
| 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: 20130313 Termination date: 20150830 |
|
| EXPY | Termination of patent right or utility model |