CN211705943U - Sealing system of coal-to-ethylene glycol rectification system and coal-to-ethylene glycol rectification system - Google Patents
Sealing system of coal-to-ethylene glycol rectification system and coal-to-ethylene glycol rectification system Download PDFInfo
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- CN211705943U CN211705943U CN201922130836.4U CN201922130836U CN211705943U CN 211705943 U CN211705943 U CN 211705943U CN 201922130836 U CN201922130836 U CN 201922130836U CN 211705943 U CN211705943 U CN 211705943U
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- glycol rectification
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Abstract
The application relates to a sealing system and coal system ethylene glycol rectification system of coal system ethylene glycol rectification system, this sealing system of coal system ethylene glycol rectification system includes: one or more isolation covers are arranged to cover at least part of a connecting part of a fluid channel in the coal-to-ethylene glycol rectification system, so that the connecting part is positioned in an airtight cavity formed by the isolation covers; the isolation cover is provided with an air inlet which is communicated with an inert gas source; and the control unit is used for controlling the inert gas source to introduce inert gas into the cavity so as to form positive pressure in the cavity. The rectification system for preparing ethylene glycol from coal is provided with the sealing system. Through this sealing system, realized carrying out dual air isolation to the adapting unit of coal system ethylene glycol rectification system's fluid passage.
Description
Technical Field
The application relates to the technical field of coal-based ethylene glycol rectification, in particular to a sealing system of a coal-based ethylene glycol rectification system and the coal-based ethylene glycol rectification system.
Background
In the process of preparing the ethylene glycol from the coal, the crude ethylene glycol synthesized by hydrogenation is rectified and separated in the rectification procedure of the ethylene glycol product prepared from the coal to obtain the polyester-grade ethylene glycol, and because the boiling point of the material is higher, and the reaction such as polymerization and the like is easy to occur at high temperature, the rectification procedure adopts vacuum rectification, and particularly the product rectification tower adopts high vacuum rectification. In this way, although the pipe flanges such as a manhole flange, an outlet flange, and an inlet pipe of the rectifying tower, and the head flanges such as a reboiler and a cooling condenser are sealed by the sealing gasket, the possibility of air leakage is increased, and even if a small amount of oxygen in the air leaks, the quality of ethylene glycol is significantly affected at a high temperature. Especially, the sealing effect of the gasket is poor due to temperature change, uneven stress, use fatigue and the like, but the inspection cannot be carried out.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem or at least partially solve the technical problem, the application provides a sealing system of a coal-made ethylene glycol rectification system and the coal-made ethylene glycol rectification system.
In a first aspect, the present application provides a sealing system for a coal-to-ethylene glycol rectification system, comprising: one or more isolation covers are arranged to cover at least part of a connecting part of a fluid channel in the coal-to-ethylene glycol rectification system, so that the connecting part is positioned in an airtight cavity formed by the isolation covers; the isolation cover is provided with an air inlet which is communicated with an inert gas source; and the control unit is used for controlling the inert gas source to introduce inert gas into the cavity so as to form positive pressure in the cavity.
In certain embodiments, the cage comprises: first cover body and the second cover body, wherein, first cover body clamp is in the one side of adapting unit, and the second cover body clamp is in the opposite side of adapting unit, and first cover body and the butt joint of the second cover body and gas tightness are connected for adapting unit clamp is established between first cover body and the second cover body.
In some embodiments, a first sealing strip is disposed at the joint position of the first cover body and the second cover body.
In some embodiments, a second sealing band is provided between the connection location of the cage to the body of the fluid channel.
In certain embodiments, the sealing system of the coal-to-ethylene glycol rectification system further comprises: and a pressure detection component which is arranged to detect the gas pressure in the isolation cover. The control unit includes: and the valve is arranged between the inert gas source and the gas inlet of the isolation hood.
In certain embodiments, the positive pressure is between 0.02MPa and 0.03 MPa.
In certain embodiments, the first sealing tape and/or the second sealing tape is a teflon sealing tape.
In some embodiments, the isolation cover is configured to cover at least one of a manhole flange of the rectification tower, a gas outlet pipe orifice flange, a reflux inlet flange, a gas phase outlet flange of the reboiler, a liquid outlet pipe flange, an upper sealing head flange and a lower sealing head flange of the reboiler, and a sealing head flange of the condenser, or any combination thereof.
In a second aspect, the application provides a rectification system for coal-to-ethylene glycol, which includes a sealing system of any one of the rectification systems for coal-to-ethylene glycol.
In certain embodiments, a coal-to-ethylene glycol rectification system, comprising: a rectification column, a reboiler, and a condenser, but is not limited thereto.
In certain embodiments, the isolation hood is configured to shield the pipe connection part and/or the closure connection part.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: this sealing system that this application embodiment provided sets up the cage and carries out the shade to adapting unit on the fluid passage for adapting unit is located the cavity of gas tightness. And the control unit is arranged to control the inert gas to be introduced into the cavity, so that the cavity is in positive pressure, and therefore, under the condition of gas leakage, the gas entering the fluid channel is the inert gas without influencing the coal-to-ethylene glycol process.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of a sealing system of a coal-to-ethylene glycol rectification system provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an embodiment of a shield according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of an embodiment of a coal-to-ethylene glycol rectification system with a sealing system according to an embodiment of the present disclosure;
in the figure:
110 isolation cover, 111 cavity, 112 air inlet, 113 first cover body, 114 second cover body, 115 extension and 116 butt joint position;
120 a control unit;
130 fluid channels, 131 connection members, 132 connection locations;
140 a source of inert gas;
200 rectifying tower, 300 reboiler and 400 condenser;
1, a manhole isolation cover, 2, an air outlet pipe orifice flange isolation cover, 3, a reflux pipe orifice flange isolation cover, 4, a reboiler, a gas phase inlet isolation cover, 5, a liquid outlet pipe orifice flange isolation cover, 6, an upper end socket flange isolation cover of a reboiler and 7, a condenser end socket flange isolation cover;
8, a nitrogen adding pipe of the isolation hood, a 9-branch main pipe, a 10-branch main pipe, a 11-branch main pipe, a 12-branch main pipe pressure measuring point and a 13-branch main pipe pressure measuring point;
14 a docking position;
15 a connection location;
16 shut off the valve.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for the convenience of description of the present application, and have no specific meaning by themselves. Thus, "module", "component" or "unit" may be used mixedly.
The coal-based ethylene glycol rectification system provided in the embodiment of the application is arranged to rectify and separate crude ethylene glycol to obtain an ethylene glycol product. The coal-to-ethylene glycol rectification system comprises a plurality of fluid channels, and the fluid channels are connected through connecting parts. Fluid channels include fluid channels within the device and fluid channels between the devices. The attachment member includes, but is not limited to, a flange, etc. By way of illustration, the coal-to-ethylene glycol rectification system includes, but is not limited to, a rectification column, a reboiler, and a condenser.
In the embodiment of the application, the isolation cover is arranged on the connecting part of at least part of the fluid channel, so that the connecting part is positioned in the air-tight cavity formed by the isolation cover. And the control unit is arranged to control the inert gas to be introduced into the airtight cavity of the isolation cover, so that the pressure in the cavity is positive, and even if the airtightness of the connecting part is in a problem, the gas entering the fluid channel is the inert gas, so that the process of preparing the ethylene glycol from the coal is not influenced.
Fig. 1 is a schematic structural diagram of an embodiment of a sealing system of a coal-to-ethylene glycol rectification system provided in an embodiment of the present application, and as shown in fig. 1, the sealing system includes: one or more cages 110 and a control unit 120.
The isolation cover 110 is arranged to cover at least a part of the connecting part 131 of the fluid channel 130 in the coal-to-ethylene glycol rectification system, so that the connecting part 131 is positioned in the airtight cavity 111 formed by the isolation cover 110. The enclosure 110 is provided with an inlet 112, the inlet 112 being arranged in communication with an inert gas source 140. The control unit 120 is configured to control the inert gas source 140 to introduce inert gas into the chamber 111, so as to form positive pressure in the chamber 111.
Through this sealing system, set up the cage and carry out the shade to adapting unit on the fluid passage for adapting unit is located the cavity of gas tightness. And the control unit is arranged to control the inert gas to be introduced into the cavity, so that the cavity is in positive pressure, and therefore, under the condition of gas leakage, the gas entering the fluid channel is the inert gas without influencing the coal-to-ethylene glycol process.
In the embodiment of the present application, the positive pressure is formed in the cavity 111 to prevent air from entering the cavity 111, and the pressure value is set as long as it can be greater than the external atmospheric pressure. The positive pressure is greater than the pressure differential outside the chamber 111. In some embodiments, the positive pressure formed within the cavity 111 is between 0.02Mpa and 0.03 Mpa. This reduces the consumption of inert gas and reduces the requirements for the specifications of the shield 110.
In certain embodiments, the fluid channel 130 comprises a gas phase channel. In other embodiments, fluid channel 130 comprises a liquid phase channel. In some embodiments, the fluid channels 130 include gas phase channels and liquid phase channels.
In certain embodiments, the fluid channel 130 includes a fluid channel in the form of a tube, as well as a fluid channel of the device itself.
In certain embodiments, the one or more cages 110 are in communication with the inert gas source 140 via a line (not shown in FIG. 1). The lines may include a main line in communication with an inert gas source 140, and branch lines in communication with one or more of the isolation hoods 110, respectively. In some embodiments, the control unit 120 controls the amount of inert gas on the main line to control the introduction of inert gas into the chamber 111 to form a positive pressure in the chamber 111. In other embodiments, the control unit 120 controls the amount of the inert gas on the branch lines to control the inert gas to be introduced into the chamber 111, so as to form a positive pressure in the chamber 111.
In certain embodiments, the control unit 120 is a circuit system comprising a processor that controls the flow of gas such that the pressure within the chamber 111 is within a set pressure range. The circuitry may be electrically connected to the pressure sensor, obtain a pressure value from the pressure sensor, and adjust the amount of inert gas introduced into the chamber 111 based on the pressure value.
In certain embodiments, the sealing system comprises: and a pressure detecting part configured to detect a gas pressure in the cavity 111 of the shield case 110. The control unit 120 includes a valve disposed between the inert gas source 140 and the gas inlet 112 of the isolation hood 110. For example, the control unit 120 is a manual control valve, and one or more pressure gauges are provided on the sealing system to detect the pressure in the chamber 111.
In some embodiments, the pressure value within the cavity 111 of each cage 110 is at least partially independently controlled. In other embodiments, the pressure values within the cavity 111 of each cage 110 are controlled in common. But is not limited thereto.
It should be understood that the pressure within the pipe or space may be controlled by a variety of known techniques, and the embodiments of the present application are not limited to the above-described manner, which is merely exemplary.
In certain embodiments, as shown in FIG. 2, the cage 110 comprises: the mask comprises a first mask body 113 and a second mask body 114, wherein the first mask body 113 is clamped on one side of the connecting part 131, the second mask body 114 is clamped on the other side of the connecting part 131, and the first mask body 113 and the second mask body 114 are butted and hermetically connected, so that the connecting part 131 is clamped between the first mask body 113 and the second mask body 114. This embodiment facilitates the installation of the cage 110.
It should be understood that the embodiments of the present application are not limited to the structure shown in fig. 2, for example, more shields are divided according to the caliber of the fluid channel 130, and the whole shielding shield is formed by the butt joint of a plurality of shields; the cover body can also adopt other splitting directions, and the embodiment of the application is not repeated.
In some embodiments, as shown in fig. 2, the isolation cover 110 (shown in fig. 2, the first cover 113 and the second cover 114) is provided with extensions 115 of a predetermined length at both sides, and the extensions 115 are connected to the body of the fluid passage 130, so that the sealing performance is improved by the connection of the predetermined length.
In some embodiments, a first sealing strip is disposed at the joint of the first cover 113 and the second cover 114 for sealing. A second sealing band is provided to seal between the connection location 132 of the cage 110 and the body of the fluid channel 130. The first and/or second sealing tape is a teflon sealing tape.
An alternative implementation of the embodiments of the present application is described below in conjunction with fig. 3.
Fig. 3 is a schematic structural diagram of an embodiment of a coal-derived ethylene glycol rectification system with a sealing system according to an embodiment of the present disclosure, as shown in fig. 3, a rectification column 200, a reboiler 300, and a condenser 400.
As shown in fig. 3, the device further comprises a manhole isolation cover 1, an outlet pipe flange isolation cover 2, a reflux pipe flange isolation cover 3, a reboiler gas phase outlet isolation cover 4, an outlet pipe flange isolation cover 5, a reboiler end enclosure flange isolation cover 6, a condenser end enclosure flange isolation cover 7, an isolation cover nitrogen adding pipe 8, a branch header pipe 9, a branch header pipe 10, nitrogen header pipes 11 and 12, a nitrogen header pipe pressure measuring point and a branch header pipe pressure measuring point 13.
The manhole flange isolation cover 1 is sleeved on a manhole flange of the rectifying tower; the air outlet pipe orifice flange isolation cover 2 is sleeved on the air outlet pipe orifice flange; the backflow pipe orifice flange isolation cover 3 is sleeved on the backflow orifice flange; the reboiler gas phase outlet isolation cover 4 is sleeved on the reboiler gas phase outlet flange; the liquid outlet pipe opening flange isolation cover 5 is sleeved on the liquid outlet pipe flange; the reboiler end socket flange isolation cover 6 is sleeved on the upper end socket flange and the lower end socket flange of the reboiler; and the condenser end socket flange isolation cover 7 is sleeved on the condenser end socket flange.
In the embodiment of the application, the connecting positions 15 of the isolation covers 1 to 7 fixed on the pipeline or the equipment body are provided with the equal-diameter outer edges with preset lengths, the pipeline or the equipment body is attached and fixed, and the isolation covers 1 to 7 and the corresponding connecting positions 15 are sealed by adopting a tetrafluoro sealing tape. The butt joint position 14 of the shield of the shields 1 to 7 is sealed by a tetrafluoro sealing tape.
And introducing nitrogen into the cavities of the isolation covers 1 to 7 through an isolation cover nitrogen adding pipe 8, and keeping positive pressure. A cut-off valve 16 is arranged on the nitrogen adding pipe 8 of the isolation cover, and pressure gauges are arranged on the branch main pipes 9 and 10 and the nitrogen main pipe 11 and used for isolating and monitoring nitrogen seal pressure.
When the system works, the isolation covers 1 to 7 are sleeved on the corresponding flanges respectively and are fixed and sealed through bolts and a PTFE sealing tape. Then, a cut-off valve 16 arranged on the nitrogen adding pipe 8 of the isolation cover is opened, nitrogen is filled into the cavity of the corresponding isolation cover from the branch main pipes 9 and 10 and the nitrogen main pipe 11, and positive pressure is kept to play a role of nitrogen sealing.
According to the optional embodiment of the application, the flange with high air leakage possibility and large air leakage amount of the high-vacuum rectifying tower is isolated by the isolating cover, and a layer of protection for preventing air leakage is added; and then introducing nitrogen into the cavity of the isolation hood, and ensuring positive pressure, so that even if the flange seal is poor, nitrogen enters the rectifying tower, oxygen in the air is isolated, and the quality of the ethylene glycol is ensured.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A sealing system of a coal-to-ethylene glycol rectification system is characterized by comprising:
one or more isolation covers are arranged to cover at least part of a connecting part of a fluid channel in a coal-to-ethylene glycol rectification system, so that the connecting part is positioned in an airtight cavity formed by the isolation covers; the isolation cover is provided with an air inlet which is communicated with an inert gas source; and
and the control unit is used for controlling the inert gas source to introduce inert gas into the cavity so as to form positive pressure in the cavity.
2. The sealing system of a coal glycol rectification system of claim 1 wherein the isolation hood comprises: the connecting component comprises a first cover body and a second cover body, wherein the first cover body is clamped on one side of the connecting component, the second cover body is clamped on the other side of the connecting component, and the first cover body and the second cover body are in butt joint and are in air-tight connection, so that the connecting component is clamped between the first cover body and the second cover body.
3. The sealing system of a coal-to-ethylene glycol rectification system of claim 2 wherein a first sealing strip is disposed at the interface of the first housing and the second housing.
4. The sealing system of a coal glycol rectification system as claimed in claim 1 wherein a second sealing strip is provided between the connection location of the isolation hood and the body of the fluid channel.
5. The sealing system of a coal glycol rectification system according to claim 1, further comprising: a pressure detection part configured to detect a gas pressure inside the shield; the control unit includes: and the valve is arranged between the inert gas source and the gas inlet of the isolation hood.
6. The sealing system of a coal glycol rectification system according to any one of claims 1 to 5, wherein the positive pressure is between 0.02MPa and 0.03 MPa.
7. The seal system of a coal to ethylene glycol rectification system of claim 3 wherein the first seal strip is a tetrafluoro seal strip.
8. The sealing system of a coal glycol rectification system of claim 4 wherein the second sealing strip is a tetrafluoro sealing strip.
9. The sealing system of a coal glycol rectification system according to any one of claims 1 to 5, wherein the isolation cover is arranged to cover at least one of a manhole flange of a rectification tower, an outlet pipe orifice flange, a reflux orifice flange, a gas phase outlet flange of a reboiler, a liquid outlet pipe flange, an upper and lower seal head flange of the reboiler and a seal head flange of a condenser or any combination thereof.
10. A coal-to-ethylene-glycol rectification system comprising the sealing system of the coal-to-ethylene-glycol rectification system of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922130836.4U CN211705943U (en) | 2019-12-03 | 2019-12-03 | Sealing system of coal-to-ethylene glycol rectification system and coal-to-ethylene glycol rectification system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922130836.4U CN211705943U (en) | 2019-12-03 | 2019-12-03 | Sealing system of coal-to-ethylene glycol rectification system and coal-to-ethylene glycol rectification system |
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| Publication Number | Publication Date |
|---|---|
| CN211705943U true CN211705943U (en) | 2020-10-20 |
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| CN201922130836.4U Active CN211705943U (en) | 2019-12-03 | 2019-12-03 | Sealing system of coal-to-ethylene glycol rectification system and coal-to-ethylene glycol rectification system |
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| CN (1) | CN211705943U (en) |
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