CN218993077U - Dimethyl ether vaporization feeding device - Google Patents
Dimethyl ether vaporization feeding device Download PDFInfo
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- CN218993077U CN218993077U CN202223451024.8U CN202223451024U CN218993077U CN 218993077 U CN218993077 U CN 218993077U CN 202223451024 U CN202223451024 U CN 202223451024U CN 218993077 U CN218993077 U CN 218993077U
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Abstract
The utility model provides a vaporization feed arrangement of dimethyl ether, including the dimethyl ether storage tank, the dimethyl ether vaporizer, the dimethyl ether storage tank is provided with cooling device, the bottom of dimethyl ether storage tank is provided with the liquid phase pipeline, its low reaches links to each other with the material import of dimethyl ether vaporizer, this liquid phase pipeline sets gradually first valve, the delivery pump, a check valve, the top of dimethyl ether storage tank sets up the vapor phase balance pipeline, its low reaches is parallelly connected on the liquid phase pipeline, be located the low reaches of first check valve, set gradually second valve on the vapor phase balance pipeline, the second check valve, the vapor phase material outlet connection first pipeline of dimethyl ether vaporizer, be used for providing vapor state dimethyl ether to the incinerator, set gradually the third valve on the first pipeline, the third check valve. The utility model has simple structure and convenient maintenance, and can effectively prevent the blockage phenomenon caused by the excessively low environmental temperature on the basis of ensuring that the byproduct dimethyl ether is vaporized and sent to the incinerator for harmless treatment, thereby ensuring the normal operation of the incinerator.
Description
Technical Field
The utility model relates to the field of chemical industry, in particular to a dimethyl ether vaporization feeding device.
Background
In the process of synthesizing hydroxypropyl methyl cellulose (HPMC), chemical enterprises produce dimethyl ether as a byproduct, and the dimethyl ether does not have the value of selling outwards due to impurities such as water, other byproducts and the like, and is usually subjected to harmless treatment by incineration.
In order to ensure the normal operation of the incinerator, the dimethyl ether obtained as a byproduct needs to be liquefied and temporarily stored in a dimethyl ether storage tank, then is conveyed to a dimethyl ether vaporizer by a shielding pump, and is conveyed to the incinerator after being vaporized, so that the stable and controllable pressure and flow of a combustion medium (gaseous dimethyl ether) conveyed to the incinerator are ensured.
However, because the byproduct dimethyl ether contains a small amount of water, the vapor phase of the dimethyl ether vaporized by the vaporizer contains water vapor, and the valve is easy to freeze and block a pipeline at night due to too low environmental temperature in the process of conveying the dimethyl ether to the incinerator, so that the normal operation of the incinerator is influenced.
Therefore, how to effectively ensure the normal harmless incineration treatment of the byproduct dimethyl ether is a problem to be solved by the technicians in the field.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a dimethyl ether vaporization feeding device which is simple in structure and convenient to maintain, and can effectively prevent blockage caused by excessively low environmental temperature and ensure normal operation of an incinerator on the basis of ensuring harmless treatment of vaporizing byproduct dimethyl ether to the incinerator.
The technical scheme of the utility model is as follows: the utility model provides a vaporization feed arrangement of dimethyl ether, includes dimethyl ether storage tank, dimethyl ether vaporizer, the feed inlet of dimethyl ether storage tank is used for linking to each other with liquid dimethyl ether source, and the dimethyl ether storage tank is provided with cooling device, the bottom of dimethyl ether storage tank is provided with the liquid phase pipeline, the downstream end of liquid phase pipeline with the material import of dimethyl ether vaporizer links to each other, and this liquid phase pipeline sets gradually first valve, delivery pump, first check valve, the top of dimethyl ether storage tank sets up vapor phase balance pipeline, and the downstream end of vapor phase balance pipeline connects in parallel on the liquid phase pipeline, is located the low reaches of first check valve, sets gradually second valve, second check valve on the vapor phase balance pipeline, the vapor phase material exit linkage first pipeline of dimethyl ether vaporizer for provide vapor state dimethyl ether to the incinerator, set gradually third valve, third check valve on the first pipeline.
The buffer tank is arranged on the first pipeline and is positioned at the upstream of the third valve, the side wall of the buffer tank is provided with a feed inlet, the top of the buffer tank is provided with a vapor phase outlet, the buffer tank is connected with the first pipeline, the bottom of the buffer tank is provided with a liquid phase outlet and is connected with a second pipeline, the downstream end of the second pipeline is connected with the absorption tank, and the second pipeline is provided with a fourth valve.
And an insulating layer is arranged on the pipe section of the first pipeline positioned at the downstream of the buffer tank.
The first pipeline is provided with a fifth valve, the fifth valve is positioned between the third valve and the third one-way valve, the third pipeline is further included, the upstream end of the third pipeline is connected to the first pipeline and positioned between the third valve and the fifth valve, the downstream end of the third pipeline is connected with the absorption tank, and the sixth valve is arranged on the third pipeline.
The cooling device is a cooling interlayer or a cooling coil, the cooling interlayer is arranged on the tank wall of the dimethyl ether storage tank, and the cooling coil is arranged in the dimethyl ether storage tank.
The technical scheme has the following beneficial effects:
1. the dimethyl ether vaporization feeding device comprises a dimethyl ether storage tank and a dimethyl ether vaporizer, wherein the dimethyl ether storage tank is used for temporarily storing byproduct liquid-phase dimethyl ether, and the dimethyl ether vaporizer is used for converting the liquid-phase dimethyl ether into vapor-phase dimethyl ether, so that the pressure and the flow of the dimethyl ether serving as a combustion medium are controllable. The feed inlet of dimethyl ether storage tank is used for linking to each other with liquid dimethyl ether source, and the dimethyl ether storage tank is provided with cooling device for keep liquid dimethyl ether in the liquid state, obviously, the inside coexistence state that is vapor phase, liquid phase of dimethyl ether storage tank (the lower part space of dimethyl ether storage tank is liquid phase dimethyl ether, contains high boiling point impurity, and the upper space is vapor phase dimethyl ether), and the accessible control cooling device's refrigeration power, and then adjusts the pressure of vapor phase (the boiling point of dimethyl ether is-29.5 ℃). The bottom of the dimethyl ether storage tank is provided with a liquid phase pipeline, the downstream end of the liquid phase pipeline is connected with a material inlet of the dimethyl ether vaporizer, the liquid phase pipeline is sequentially provided with a first valve, a material conveying pump and a first one-way valve, the top of the dimethyl ether storage tank is provided with a vapor phase balance pipeline, the downstream end of the vapor phase balance pipeline is connected in parallel with the liquid phase pipeline and positioned at the downstream of the first one-way valve, the vapor phase balance pipeline is sequentially provided with a second valve and a second one-way valve, a vapor phase material outlet of the dimethyl ether vaporizer is connected with the first pipeline for providing vaporous dimethyl ether for the incinerator, the first pipeline is sequentially provided with a third valve and a third one-way valve, under the condition of higher ambient temperature (usually 3-10 months), liquid phase dimethyl ether containing impurities (water) is provided for the dimethyl ether vaporizer through the liquid phase pipeline after vaporization, the dimethyl ether is discharged to the incinerator to be used as a combustion medium, the requirements of harmless treatment of byproduct dimethyl ether are met, the normal operation of the incinerator is ensured, the refrigeration power of a dimethyl ether storage tank cooling device is reduced under the condition of low ambient temperature (usually 11 months, 12 months, 1 month and 2 months), even the cooling device is completely stopped, the liquid-phase dimethyl ether in the dimethyl ether storage tank maintains the vaporization amount (vaporization heat absorption), so that the vapor-phase dimethyl ether in the upper space is maintained at high pressure and almost does not contain water (the boiling point temperature of water is far higher than that of the dimethyl ether), the vapor-phase dimethyl ether provides almost anhydrous vapor-phase dimethyl ether for a dimethyl ether vaporizer through a vapor-phase balance pipeline, the vapor-phase dimethyl ether can be smoothly discharged to the incinerator to be used as the combustion medium in a low-temperature environment after being heated, the condition of pipeline or valve blockage can not occur, and the harmless treatment byproduct dimethyl ether is met, and simultaneously, the normal operation requirement of the incinerator is ensured. Through nimble switching feeding mode, can avoid accumulating more moisture in the dimethyl ether storage tank (utilize vapor phase balance pipeline to feed to dimethyl ether vaporizer for a long time, moisture accumulation is in the dimethyl ether storage tank) influence the burning quality of dimethyl ether (take away moisture through nimble switching to liquid phase feeding), also can avoid carrying the pipeline of vapor phase dimethyl ether to take place to block up under the lower condition of ambient temperature, satisfy the demand of harmless processing byproduct dimethyl ether all the year round.
2. The first pipeline is provided with a buffer tank, the buffer tank is positioned at the upstream of the third valve, the side wall of the buffer tank is provided with a feed inlet, the top of the buffer tank is provided with a vapor phase outlet, the buffer tank is connected with the first pipeline, the bottom of the buffer tank is provided with a liquid phase outlet and is connected with the second pipeline, the downstream end of the second pipeline is connected with an absorption tank, the second pipeline is provided with a fourth valve, vapor phase dimethyl ether passing through a dimethyl ether vaporizer enters the buffer tank to be decelerated and depressurized, a small amount of impurities, such as water, are converted into liquid phase and vapor phase medium to be separated for being discharged to the absorption tank for treatment, and the combustion quality of the incinerator can be further guaranteed.
3. The pipe section of the first pipeline positioned at the downstream of the buffer tank is provided with an insulating layer, so that the influence of a low-temperature environment on vapor phase materials in the first pipeline is reduced.
4. The third pipeline is provided with a sixth valve, when the vapor phase material pressure on the first pipeline is too high, the opening of the fifth valve and the sixth valve can be controlled, and the vapor phase material with higher partial pressure is conveyed to the absorption tank, so that the safe and normal operation of the incinerator is ensured.
Further description is provided below with reference to the drawings and detailed description.
Drawings
FIG. 1 is a schematic diagram of the connection of the present utility model.
In the drawing, 1 is a dimethyl ether storage tank, 2 is a dimethyl ether vaporizer, 3 is a cooling device, 4 is a liquid phase pipeline, 5 is a material conveying pump, 6 is a vapor phase balance pipeline, 7 is a first pipeline, 8 is a buffer tank, 9 is a second pipeline, 10 is a third pipeline, a is a first valve, B is a second valve, C is a third valve, d is a fourth valve, e is a fifth valve, f is a sixth valve, A is a first one-way valve, B is a second one-way valve, and C is a third one-way valve.
Detailed Description
In the utility model, the equipment or structure is conventional equipment or structure in the chemical industry, and the connection mode is recommended by manufacturers or conventional connection mode.
Referring to fig. 1, an embodiment of a vaporization feed device for dimethyl ether is shown. The dimethyl ether vaporization feeding device comprises a dimethyl ether storage tank 1 and a dimethyl ether vaporizer 2. The feed inlet of dimethyl ether storage tank 1 is used for linking to each other with liquid dimethyl ether source, and dimethyl ether storage tank 2 is provided with cooling device 3, and in this embodiment, cooling device 3 is the cooling intermediate layer, and the cooling intermediate layer sets up on the tank wall of dimethyl ether storage tank, utilizes chilled water as cooling medium, of course, also can adopt cooling coil, and cooling coil sets up in the inside of dimethyl ether storage tank, adopts chilled water as cooling medium equally, and in general, the volume of dimethyl ether storage tank is confirmed according to the byproduct dimethyl ether volume of enterprise. The bottom of dimethyl ether storage tank 1 is provided with liquid phase pipeline 4, and liquid phase pipeline 4's low reaches end with dimethyl ether vaporizer's material import links to each other, sets gradually first valve a, delivery pump 5, first check valve A on this liquid phase pipeline 4, generally, in order to satisfy actual need, still is provided with the return line, and the upstream end of return line links to each other with liquid phase pipeline, is located between delivery pump 5 and the first check valve A, and this return line's low reaches end links to each other with the dimethyl ether storage tank, and is provided with the valve on the return line. The top of dimethyl ether storage tank 1 sets up vapor phase balance pipeline 6, and vapor phase balance pipeline 6's low reaches end connects in parallel on liquid phase pipeline 4, is located the low reaches of first check valve A, sets gradually second valve B, second check valve B on the vapor phase balance pipeline 6, and normally, in order to satisfy actual need, vapor phase balance pipeline's quantity sets up to two, connects on the liquid phase pipeline after the parallel. The dimethyl ether vaporizer 2 adopts low pressure steam as heating medium, the vapor phase material outlet of the dimethyl ether vaporizer is connected with a first pipeline 7 for providing vapor state dimethyl ether for the incinerator, a third valve C and a third one-way valve C are sequentially arranged on the first pipeline 7, obviously, a matched structure such as an explosion-proof valve is further arranged at the top of the dimethyl ether vaporizer, in this embodiment, a buffer tank 8 is arranged on the first pipeline and is positioned at the upstream of the third valve C, a feed inlet is arranged on the side wall of the buffer tank 8 and is used for being connected with the vapor phase material outlet at the top of the dimethyl ether vaporizer, the top of the buffer tank is provided with a vapor phase outlet and is connected with the first pipeline 7, the bottom of the buffer tank is provided with a liquid phase outlet and is connected with a second pipeline 9, the downstream end of the second pipeline 9 is connected with an absorption tank, a fourth valve d is arranged on the second pipeline 9, a fifth valve e is arranged on the first pipeline 7 and is positioned between the third valve C and the third one-way valve C, a third pipeline 10 is further arranged between the third valve C and the third valve C, the upstream end of the third pipeline 10 is connected with the third pipeline 10, and the third pipeline 10 is positioned at the upstream end of the third pipeline f.
Further, in order to reduce the influence of the low-temperature environment on the vapor phase material in the first pipeline, a heat insulation layer, such as an asbestos heat insulation layer, is arranged on a pipe section of the first pipeline positioned at the downstream of the buffer tank 8, or an electric auxiliary heating device is paved.
The working principle of the utility model is as follows: in the process of synthesizing hydroxypropyl methyl cellulose, the dimethyl ether (containing impurities such as water) obtained by the byproducts enters a dimethyl ether storage tank for temporary storage after being liquefied by enterprises, and the vaporization amount of the dimethyl ether in the dimethyl ether storage tank is controlled by controlling the flow of chilled water. In months with higher external environment temperature, such as 3-10 months, the flow of chilled water needs to be increased, the vaporization amount of dimethyl ether is reduced, the safety of a dimethyl ether storage tank is ensured, liquid-phase dimethyl ether containing impurities (water) is provided for a dimethyl ether vaporizer through a liquid-phase pipeline, after vaporization, a small amount of water vapor is mixed with vapor phase dimethyl ether, after the vapor phase dimethyl ether is decelerated and stabilized by a buffer tank, part of water vapor is converted into liquid water, and most of vapor phase dimethyl ether mixed water vapor is used as a combustion medium by a first pipeline incinerator, so that the requirements of harmless treatment of byproduct dimethyl ether and normal operation of the incinerator are met; in months with lower external environment temperature, such as 11 months-2 months in open year, the freezing water needs to be reduced or even not introduced so as to increase the vaporization amount of the dimethyl ether, the liquid-phase dimethyl ether in the dimethyl ether storage tank maintains the vaporization amount, so that the vapor-phase dimethyl ether in the upper space is maintained at higher pressure and almost does not contain water (the boiling point temperature of water is far higher than that of the dimethyl ether), the vapor-phase dimethyl ether provides the vapor-phase dimethyl ether almost without water for the dimethyl ether vaporizer through a vapor-phase balance pipeline, and after the temperature is raised, the vapor-phase dimethyl ether can be smoothly discharged to the incinerator through a first pipeline under the low-temperature environment to be used as a combustion medium without the condition of pipeline or valve blockage, thereby meeting the requirements of harmless treatment of byproduct dimethyl ether and ensuring the normal operation of the incinerator.
Claims (5)
1. The utility model provides a vaporization feed arrangement of dimethyl ether which characterized in that: comprises a dimethyl ether storage tank (1) and a dimethyl ether vaporizer (2), wherein a feed inlet of the dimethyl ether storage tank (1) is used for being connected with a liquid dimethyl ether source, the dimethyl ether storage tank (1) is provided with a cooling device (3),
the bottom of the dimethyl ether storage tank (1) is provided with a liquid phase pipeline (4), the downstream end of the liquid phase pipeline (4) is connected with a material inlet of the dimethyl ether vaporizer, a first valve (a), a material conveying pump (5) and a first one-way valve (A) are sequentially arranged on the liquid phase pipeline (4), the top of the dimethyl ether storage tank (1) is provided with a vapor phase balance pipeline (6), the downstream end of the vapor phase balance pipeline (6) is connected in parallel on the liquid phase pipeline (4) and positioned at the downstream of the first one-way valve (A), a second valve (B) and a second one-way valve (B) are sequentially arranged on the vapor phase balance pipeline (6),
the vapor phase material outlet of the dimethyl ether vaporizer (2) is connected with a first pipeline (7) for providing vapor dimethyl ether for the incinerator, and a third valve (C) and a third one-way valve (C) are sequentially arranged on the first pipeline (7).
2. The dimethyl ether vaporization feed apparatus of claim 1, wherein: be provided with buffer tank (8) on first pipeline (7), be located the upper reaches of third valve (c), the lateral wall of this buffer tank (8) sets up the feed inlet, and the top of buffer tank sets up vapor phase export, connects first pipeline (7), and the bottom of buffer tank sets up liquid phase export, and connects second pipeline (9), and the downstream end and the absorption pond of second pipeline (9) link to each other, set up fourth valve (d) on this second pipeline (9).
3. The vaporization feed unit of dimethyl ether according to claim 2, wherein: the pipe section of the first pipeline positioned at the downstream of the buffer tank (8) is provided with an insulating layer.
4. The dimethyl ether vaporization feed apparatus of claim 1, wherein: the third pipeline (10) is characterized in that a fifth valve (e) is arranged on the first pipeline (7), the third pipeline (10) is positioned between the third valve (C) and the third one-way valve (C), the upstream end of the third pipeline (10) is connected to the first pipeline and positioned between the third valve (C) and the fifth valve (e), the downstream end of the third pipeline (10) is connected with the absorption tank, and a sixth valve (f) is arranged on the third pipeline (10).
5. The dimethyl ether vaporization feed apparatus of claim 1, wherein: the cooling device (3) is a cooling interlayer or a cooling coil, the cooling interlayer is arranged on the tank wall of the dimethyl ether storage tank, and the cooling coil is arranged in the dimethyl ether storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223451024.8U CN218993077U (en) | 2022-12-23 | 2022-12-23 | Dimethyl ether vaporization feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223451024.8U CN218993077U (en) | 2022-12-23 | 2022-12-23 | Dimethyl ether vaporization feeding device |
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| Publication Number | Publication Date |
|---|---|
| CN218993077U true CN218993077U (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223451024.8U Active CN218993077U (en) | 2022-12-23 | 2022-12-23 | Dimethyl ether vaporization feeding device |
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| CN (1) | CN218993077U (en) |
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- 2022-12-23 CN CN202223451024.8U patent/CN218993077U/en active Active
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