CN210993109U - Regeneration energy-saving device for liquid phase dryer of MTO device - Google Patents
Regeneration energy-saving device for liquid phase dryer of MTO device Download PDFInfo
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- CN210993109U CN210993109U CN201921772129.9U CN201921772129U CN210993109U CN 210993109 U CN210993109 U CN 210993109U CN 201921772129 U CN201921772129 U CN 201921772129U CN 210993109 U CN210993109 U CN 210993109U
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Abstract
A regeneration energy-saving device of a liquid phase dryer of an MTO device comprises the liquid phase dryer, a feeding pipeline, a discharging pipeline, a nitrogen supply pipeline and a regeneration gas discharge pipeline, wherein the feeding pipeline, the discharging pipeline, the nitrogen supply pipeline and the regeneration gas discharge pipeline are communicated with the liquid phase dryer; the device comprises a nitrogen supply pipeline, an electric heater, a heat exchange bypass, a heat exchanger and a heat exchange control valve, wherein the nitrogen supply pipeline on the inlet side of the electric heater is provided with the electric heater, the heat exchange bypass is connected in parallel with the nitrogen supply pipeline on the inlet side of the electric heater, the heat exchanger and the heat exchange control valve are arranged on the heat exchange bypass, a cold inlet and a cold outlet of the heat exchanger are communicated with the nitrogen supply pipeline on the inlet side of the electric heater, a first switching valve is arranged on the nitrogen supply pipeline between the cold inlet and the cold outlet of the heat exchanger, and a hot inlet. The device reasonable in design, energy-conserving high-efficient has effectively reduced regeneration nitrogen gas quantity and electric heater's operating power, and the energy consumption descends obviously, and the programming rate is fast for the regeneration export of liquid phase desicator can reach the design temperature.
Description
Technical Field
The utility model relates to a MTO production technical field, especially a MTO device liquid phase desicator regeneration economizer.
Background
At present, in the production process of MTO (methanol to olefin), liquid phase dryers are divided into A, B liquid phase dryers, 3A molecular sieves are filled in the liquid phase dryers and used for drying liquid phase products of MTO devices, one liquid phase dryer is in a moisture adsorption state during normal production, the other liquid phase dryer is in a regeneration state, after one liquid phase dryer adsorbs certain moisture, the other liquid phase dryer is switched to operate, and hot nitrogen is used for passing through a dryer bed layer during regeneration of the liquid phase dryer, so that the moisture is desorbed.
The defects of the prior art are as follows: the temperature is slowly increased, the regeneration time exceeds the design index, the water content at the outlet of the operation platform exceeds the standard, the outlet cannot be increased to the design temperature when the liquid phase dryer is regenerated, the regeneration effect is poor, and the nitrogen and electric energy consumption is large.
Disclosure of Invention
The utility model aims to solve the technical problem that to prior art not enough, provide a reasonable in design, energy-efficient, effectively reduce nitrogen gas quantity and electric heater's operating power's MTO device liquid phase desicator regeneration economizer.
The technical problem to be solved by the utility model is realized through the following technical scheme. The utility model relates to a regeneration energy-saving device of a liquid phase dryer of an MTO device, which comprises the liquid phase dryer, a feeding pipeline, a discharging pipeline, a nitrogen supply pipeline and a regenerated gas discharging pipeline, wherein the feeding pipeline, the discharging pipeline, the nitrogen supply pipeline and the regenerated gas discharging pipeline are communicated with the liquid phase dryer; the device comprises a nitrogen supply pipeline, an electric heater, a heat exchange bypass, a heat exchanger and a heat exchange control valve, wherein the nitrogen supply pipeline on the inlet side of the electric heater is provided with the electric heater, the heat exchange bypass is connected in parallel with the nitrogen supply pipeline on the inlet side of the electric heater, the heat exchanger and the heat exchange control valve are arranged on the heat exchange bypass, a cold inlet and a cold outlet of the heat exchanger are communicated with the nitrogen supply pipeline on the inlet side of the electric heater, a first switching valve is arranged on the nitrogen supply pipeline between the cold inlet and the cold outlet of the heat exchanger, and a hot inlet.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above MTO device liquid phase desicator regeneration economizer, the bottom and the charge-in pipeline intercommunication of liquid phase desicator, the external feeding knockout drum of charge-in pipeline.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above MTO device liquid phase desicator regeneration economizer, the top and the ejection of compact pipeline intercommunication of liquid phase desicator still install the filter on the ejection of compact pipeline.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above MTO device liquid phase desicator regeneration economizer, the bottom and the regeneration gas discharge pipeline intercommunication of liquid phase desicator, the external regeneration gas knockout drum of regeneration gas discharge pipeline still install regeneration gas cooler on regeneration gas discharge pipeline.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above MTO device liquid phase desicator regeneration economizer, the device still includes the pressure release exhaust duct, the bottom and the pressure release exhaust duct intercommunication of liquid phase desicator, the external compressor suction tank of pressure release exhaust duct.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above MTO device liquid phase desicator regeneration economizer, the valve that is used for the control duct break-make is all installed with charge-in pipeline, ejection of compact pipeline, nitrogen gas supply pipeline and regeneration gas discharge pipe's intercommunication department to liquid phase desicator.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above MTO device liquid phase desicator regeneration economizer, the liquid phase desicator comprises two liquid phase desicators in parallel.
Compared with the prior art, the utility model fully utilizes the regenerated gas heat exceeding 200 ℃ when the liquid phase dryer is regenerated by the arrangement of the heat exchanger, and in the initial stage, the heat exchanger is not put into use; and after the constant temperature of the dryer is finished, the bypass is cut out of the heat exchanger, so that the dryer can be cooled normally. The device reasonable in design, energy-conserving high-efficient, effectively reduced regeneration nitrogen gas quantity and electric heater's operating power, the energy consumption descends obviously, and the programming rate is fast for the regeneration export of liquid phase drying ware can reach design temperature, and the dew point satisfies the production requirement after the regeneration, and the regeneration time reduces about 8 hours.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the regeneration energy-saving device of a liquid phase dryer of an MTO device comprises the liquid phase dryer, and a feeding pipeline 3, a discharging pipeline 4, a nitrogen supply pipeline 5 and a regeneration gas discharge pipeline 6 which are communicated with the liquid phase dryer; an electric heater 7 is installed on the nitrogen supply pipeline 5, a heat exchange bypass is further connected in parallel on the nitrogen supply pipeline 5 on the inlet side of the electric heater 7, a heat exchanger 8 and a heat exchange control valve 9 are installed on the heat exchange bypass, a cold inlet and a cold outlet of the heat exchanger 8 are both communicated with the nitrogen supply pipeline 5 on the inlet side of the electric heater 7, a first switching valve 10 is installed on the nitrogen supply pipeline 5 between the cold inlet and the cold outlet of the heat exchanger 8, and a hot inlet and a hot outlet of the heat exchanger 8 are connected in series on the regeneration gas discharge pipeline 6. Initially, the heat exchange control valve 9 is closed, the first switching valve 10 is opened, and nitrogen supplied by the nitrogen supply pipeline 5 respectively enters the liquid phase dryer through the electric heater 7 and is discharged through the regeneration gas discharge pipeline 6; when the temperature of the regenerated gas discharged from the regenerated gas discharge pipeline 6 is higher than the temperature of the nitrogen supplied by the nitrogen supply pipeline 5, the heat exchange control valve 9 is opened, the first switching valve 10 is closed, so that the nitrogen supplied by the nitrogen supply pipeline 5 firstly enters the heat exchanger 8, the regenerated gas in the regenerated gas discharge pipeline 6 also passes through the heat exchanger 8, the nitrogen is preheated by the regenerated gas in the heat exchanger 8, and the preheated nitrogen is heated by the electric heater 7 and then is sent to the liquid phase dryer, so that the initial temperature of the nitrogen entering the electric heater 7 is effectively increased, the temperature rise time of the nitrogen is reduced, and the power of the electric heater 7 is convenient to reduce; after the constant temperature of the liquid phase dryer is finished, the heat exchange control valve 9 is closed, the first switching valve 10 is opened, the heat exchanger 8 is cut out, and the liquid phase dryer can be guaranteed to be cooled normally.
The bottom of the liquid phase dryer is communicated with a feeding pipeline 3, and the feeding pipeline 3 is externally connected with a feeding separation tank. The feeding separating tank is a feeding separating tank in the prior art and is used for inputting materials into the liquid phase dryer through the feeding pipeline 3 and drying the materials.
The top of the liquid phase dryer is communicated with the discharge pipeline 4, and the discharge pipeline 4 is also provided with a filter 11. The filter 11 is used for filtering the material output by the liquid phase dryer, so that the filtered material can be conveyed to the next working procedure by the discharge pipeline 4.
The bottom of the liquid phase dryer is communicated with a regenerated gas discharge pipeline 6, the regenerated gas discharge pipeline 6 is externally connected with a regenerated gas separation tank 12, and a regenerated gas cooler 13 is further installed on the regenerated gas discharge pipeline 6. The regeneration gas separation tank 12 can be communicated with an external gas-liquid separator and is used for pumping the regeneration gas discharge pipeline 6, and the regeneration gas cooler 13 is used for cooling the regeneration gas discharged by the liquid phase dryer; the regeneration gas separation tank 12 and the regeneration gas cooler 13 both adopt the regeneration gas separation tank 12 and the regeneration gas cooler 13 in the prior art.
The device also comprises a pressure relief exhaust pipeline 14, the bottom of the liquid phase dryer is communicated with the pressure relief exhaust pipeline 14, and the pressure relief exhaust pipeline 14 is externally connected with a compressor suction tank. The compressor suction tank refers to a gas-liquid separator in the prior art, and comprises a compressor and a suction tank, wherein the compressor is used for pumping air and releasing pressure and exhausting air to a liquid-phase dryer, the compressor is sucked to be gas, liquid can be left in the tank, the compressor is guaranteed not to suck the liquid and liquid impact is avoided, and the safety of the compressor is guaranteed.
And valves 15 for controlling the on-off of the pipelines are arranged at the communication positions of the liquid phase dryer, the feeding pipeline 3, the discharging pipeline 4, the nitrogen supply pipeline 5 and the regeneration gas discharge pipeline 6. The valve 15 is arranged to control the on-off of the pipeline where the valve 15 is located, the valve 15 can be configured according to the attached drawing 1 of the application, in practice, the number of the valves 15 can be increased or decreased according to actual needs, and the whole device can be guaranteed to be safe and stable in operation.
The liquid phase dryer is formed by connecting two liquid phase dryers in parallel. The two liquid phase dryers are a first liquid phase dryer 1 and a second liquid phase dryer 2, and in practice, a plurality of liquid phase dryers may be provided as needed.
Claims (7)
1. The utility model provides a MTO device liquid phase desicator regeneration economizer which characterized in that: the device comprises a liquid phase dryer, a feeding pipeline, a discharging pipeline, a nitrogen supply pipeline and a regeneration gas discharge pipeline, wherein the feeding pipeline, the discharging pipeline, the nitrogen supply pipeline and the regeneration gas discharge pipeline are communicated with the liquid phase dryer; the device comprises a nitrogen supply pipeline, an electric heater, a heat exchange bypass, a heat exchanger and a heat exchange control valve, wherein the nitrogen supply pipeline on the inlet side of the electric heater is provided with the electric heater, the heat exchange bypass is connected in parallel with the nitrogen supply pipeline on the inlet side of the electric heater, the heat exchanger and the heat exchange control valve are arranged on the heat exchange bypass, a cold inlet and a cold outlet of the heat exchanger are communicated with the nitrogen supply pipeline on the inlet side of the electric heater, a first switching valve is arranged on the nitrogen supply pipeline between the cold inlet and the cold outlet of the heat exchanger, and a hot inlet.
2. The MTO unit liquid phase dryer regeneration energy saving device of claim 1, wherein: the bottom of the liquid phase dryer is communicated with a feeding pipeline, and the feeding pipeline is externally connected with a feeding separation tank.
3. The MTO unit liquid phase dryer regeneration energy saving device of claim 1, wherein: the top of the liquid phase dryer is communicated with a discharge pipeline, and a filter is further installed on the discharge pipeline.
4. The MTO unit liquid phase dryer regeneration energy saving device of claim 1, wherein: the bottom of the liquid phase dryer is communicated with a regenerated gas discharge pipeline, the regenerated gas discharge pipeline is externally connected with a regenerated gas separation tank, and a regenerated gas cooler is further installed on the regenerated gas discharge pipeline.
5. The MTO unit liquid phase dryer regeneration energy saving device of claim 1, wherein: the device also comprises a pressure relief exhaust pipeline, the bottom of the liquid phase dryer is communicated with the pressure relief exhaust pipeline, and the pressure relief exhaust pipeline is externally connected with a compressor suction tank.
6. The MTO unit liquid phase dryer regeneration energy saving device of claim 1, wherein: and valves for controlling the on-off of the pipelines are arranged at the communication parts of the liquid phase dryer, the feeding pipeline, the discharging pipeline, the nitrogen supply pipeline and the regenerated gas discharging pipeline.
7. The MTO unit liquid phase dryer regeneration energy saving device of claim 1, wherein: the liquid phase dryer is formed by connecting two liquid phase dryers in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921772129.9U CN210993109U (en) | 2019-10-22 | 2019-10-22 | Regeneration energy-saving device for liquid phase dryer of MTO device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921772129.9U CN210993109U (en) | 2019-10-22 | 2019-10-22 | Regeneration energy-saving device for liquid phase dryer of MTO device |
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| CN210993109U true CN210993109U (en) | 2020-07-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112742070A (en) * | 2020-12-18 | 2021-05-04 | 安徽金禾实业股份有限公司 | Device and method for removing moisture in liquid chloromethane through multistage drying |
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2019
- 2019-10-22 CN CN201921772129.9U patent/CN210993109U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112742070A (en) * | 2020-12-18 | 2021-05-04 | 安徽金禾实业股份有限公司 | Device and method for removing moisture in liquid chloromethane through multistage drying |
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