Shift converter heat exchange device for methanol synthesis device
By designing a heat exchange device for the shift converter, the heat of circulating steam through copper tubes is used to heat the catalyst and crude syngas, solving the problem of short catalyst life at high temperatures in the early stages. This enables the effective utilization of the catalyst's low-temperature activity, extends its service life, and improves the efficiency of the shift converter.
Patent Information
- Application Number
- CN202422540224.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-10-21
AI Technical Summary
In the existing technology, the conversion catalyst has a short service life in the initial high temperature environment, and cannot effectively utilize the low temperature activity, which affects the service life of the catalyst.
A heat exchange device for a shift furnace in a methanol synthesis unit was designed, including a heating component and an inlet component. The catalyst and crude synthesis gas are heated by circulating steam heat through copper pipes, and the furnace inlet temperature is controlled by a shut-off valve to make full use of the low-temperature activity of the catalyst.
It effectively extends the service life of the catalyst, improves the utilization rate of the catalyst's low-temperature activity, and enhances the working efficiency of the converter.
Smart Images
Figure CN223726897U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of purification device heat exchange equipment, specifically a shift converter heat exchange device for methanol synthesis device. BACKGROUND
[0002] The purification device shift unit is to generate H2 and CO2 by reacting CO and excess water vapor in the crude synthesis gas from the upstream gasification unit, and to convert most of the organic sulfides in the crude synthesis gas into inorganic sulfides H2S which is easy to remove, the purpose is to convert the excessive CO in the crude gas into CO2, and to produce H2 as a byproduct, to adjust the content of CO and H2 in the crude gas to meet the requirements of the methanol synthesis device for hydrogen carbon ratio, the shift reaction is carried out in the shift converter, the shift converter is provided with catalyst, the function of the shift converter is to generate hydrogen and carbon dioxide under the action of the catalyst, and the required synthesis gas is obtained, the shift reaction can adjust the ratio of H2 / CO to meet the gas component requirements of the following synthesis process.
[0003] At present, the average service life of the catalyst in the purification device is about two years, the main reason for the short service life of the catalyst is that in the initial stage of using the shift catalyst, the inlet temperature of the shift converter is as high as 280 DEG C under the condition that the crude synthesis gas bypass valve is fully opened in the shift converter inlet heater, the low temperature activity of the shift catalyst cannot be effectively utilized, which seriously affects the service life of the catalyst.
[0004] Therefore, the utility model provides a shift converter heat exchange device for methanol synthesis device to solve the above problems. Utility model content
[0005] In order to solve the above technical problems, the utility model provides the following technical scheme:
[0006] A shift converter heat exchange device for methanol synthesis device, including heating assembly, the heating assembly includes shell, first end cover, second end cover and copper pipe, the first end cover and second end cover are located at both ends of the shell respectively, the copper pipe is installed in the inner chamber of the shell, the surface of the heating assembly is provided with air inlet assembly, the air inlet assembly includes catalyst inlet, exhaust port, furnace inlet pipe, cut-off valve, communication pipe, bypass pipe, temperature sensor and bypass valve, the furnace inlet pipe and communication pipe are located at the upper end and the lower end of the surface of the second end cover respectively, and are communicated with the inner chamber of the second end cover, the two ends of the bypass pipe are communicated with the furnace inlet pipe and the communication pipe respectively, the cut-off valve and temperature sensor are installed on the surface of the furnace inlet pipe, and the end of the furnace inlet pipe away from the second end cover is communicated with the inlet of the shift converter.
[0007] Further, in the utility model, the catalyst inlet is located the upper end of the shell surface, the exhaust port is located the lower end of the shell surface, the catalyst inlet and the exhaust port all communicate with the inner chamber of the shell.
[0008] Further, in the utility model, the two ends of the shell respectively communicate with the inner chambers of the first end cover and the second end cover, and the first end cover and the second end cover are all threadedly connected with the shell through bolts.
[0009] Further, in the utility model, the heating assembly further includes a first steam inlet, a second steam inlet, a backflow port and a partition plate, and the partition plate is fixed in the inner chamber of the first end cover.
[0010] Further, in the utility model, the first steam inlet and the backflow port are all located the upper end of the first end cover surface and all communicate with the inner chamber of the first end cover, and the second steam inlet is located the lower end of the first end cover surface and communicates with the inner chamber of the first end cover.
[0011] Further, in the utility model, the bypass valve is installed on the surface of the bypass pipe, and the detection end of the temperature sensor extends to the inner chamber of the furnace inlet pipe.
[0012] Beneficial effects, the utility model has following beneficial effects:
[0013] The utility model discloses a heating assembly and an air inlet assembly are arranged, can heat the crude synthetic gas, the shell, the first end cover and the second end cover provide the closed heating space, and the copper pipe is used for circulating the steam, the catalyst is added to the inner chamber of the second end cover through the catalyst inlet, the crude synthetic gas is added to the inner chamber of the second end cover through the communication pipe, is heated through the heat of steam, and the mixed gas after heating is discharged to the shift converter through the furnace inlet pipe, and the flow of the furnace inlet is adjusted through the cut-off valve, thereby can control the furnace inlet temperature, fully utilize the low-temperature activity of shift catalyst initial stage, and effectively improve the service life of the catalyst. ACCURACY OF DRAWINGS
[0014] Figure 1 It is the main view structure schematic drawing of the utility model, and
[0015] Figure 2 It is the connection state structure schematic drawing of the first end cover and the shell of the utility model, and
[0016] Figure 3 It is the separation state structure schematic drawing of the heating assembly and the air inlet assembly of the utility model, and
[0017] Figure 4 It is the connection state structure schematic drawing of the copper pipe and the shell of the utility model.
[0018] In the drawing:
[0019] 1, heating assembly; 101, shell; 102, first end cover; 103, second end cover; 104, copper pipe; 105, first steam inlet; 106, second steam inlet; 107, backflow port; 108, partition; 2, air inlet assembly; 201, catalyst inlet; 202, exhaust port; 203, furnace inlet pipe; 204, shut-off valve; 205, communication pipe; 206, bypass pipe; 207, temperature sensor; 208, bypass valve. DETAILED DESCRIPTION
[0020] In order to better understand the technical content of the utility model, specific embodiments are described below with the accompanying drawings. In the present disclosure, aspects of the utility model are described with reference to the accompanying drawings, which show many embodiments of the description. The embodiments of the present disclosure are not necessarily defined in all aspects of the utility model. It should be understood that the above-mentioned various concepts and embodiments, as well as those described in more detail below, can be implemented in any one of many ways, because the concepts and embodiments disclosed by the utility model are not limited to any implementation. In addition, some aspects of the utility model can be used alone, or in any appropriate combination with other aspects of the utility model.
[0021] Embodiment 1
[0022] As Figures 1-4 shown, the first embodiment of the utility model provides a shift furnace heat exchange device for methanol synthesis device, which comprises a heating assembly 1, the heating assembly 1 includes shell 101, first end cover 102, second end cover 103 and copper pipe 104, first end cover 102 and second end cover 103 are located at both ends of shell 101 respectively, copper pipe 104 is installed in the inner cavity of shell 101, the surface of heating assembly 1 is provided with air inlet assembly 2, air inlet assembly 2 includes catalyst inlet 201, exhaust port 202, furnace inlet pipe 203, shut-off valve 204, communication pipe 205, bypass pipe 206, temperature sensor 207 and bypass valve 208, furnace inlet pipe 203 and communication pipe 205 are located at the upper end and lower end of the surface of second end cover 103 respectively, and both communicate with the inner cavity of second end cover 103, both ends of bypass pipe 206 communicate with furnace inlet pipe 203 and communication pipe 205 respectively, shut-off valve 204 and temperature sensor 207 are installed on the surface of furnace inlet pipe 203, one end of furnace inlet pipe 203 away from second end cover 103 communicates with the inlet of change furnace.
[0023] As Figures 1-4As shown, the shell 101, the first end cover 102 and the second end cover 103 are used for providing a closed heating space, the copper pipe 104 is used for circulating steam, the catalyst is added into the inner cavity of the second end cover 103 through the catalyst inlet 201, the crude synthesis gas is added into the inner cavity of the second end cover 103 through the communication pipe 205, is heated by the heat of the steam, the mixed gas after heating is discharged into the reformer through the furnace inlet pipe 203, the flow rate of the furnace inlet is adjusted through the cut-off valve 204, so that the furnace inlet temperature can be controlled, the low-temperature activity of the shift catalyst is effectively utilized by controlling the reformer inlet temperature, and the service life of the catalyst is prolonged.
[0024] Embodiment 2
[0025] With reference to Figures 1-4 As a second embodiment of the utility model, the embodiment is based on the previous embodiment.
[0026] In the embodiment, the catalyst inlet 201 is located at the upper end of the surface of the shell 101, and the exhaust port 202 is located at the lower end of the surface of the shell 101, and the catalyst inlet 201 and the exhaust port 202 are both in communication with the inner cavity of the shell 101.
[0027] The two ends of the shell 101 are respectively in communication with the inner cavities of the first end cover 102 and the second end cover 103, and the first end cover 102 and the second end cover 103 are both threadedly connected with the shell 101 through bolts.
[0028] The heating assembly 1 further comprises a first steam inlet 105, a second steam inlet 106, a reflux port 107 and a partition plate 108, and the partition plate 108 is fixed to the inner cavity of the first end cover 102.
[0029] The first steam inlet 105 and the reflux port 107 are both located at the upper end of the surface of the first end cover 102 and are both in communication with the inner cavity of the first end cover 102, and the second steam inlet 106 is located at the lower end of the surface of the first end cover 102 and is in communication with the inner cavity of the first end cover 102.
[0030] The bypass valve 208 is installed on the surface of the bypass pipe 206, and the detection end of the temperature sensor 207 extends into the inner cavity of the furnace inlet pipe 203.
[0031] As Figures 1-4As shown, the first steam inlet 105 is used for communicating with a superheated steam pipeline, the second steam inlet 106 is used for communicating with a saturated steam pipeline, the superheated steam can be used when heating the gas, the saturated steam can be used when cleaning the equipment, the partition plate 108 divides the inner cavity of the first end cover 102 into a steam chamber and a reflux chamber, so that the reflux steam can prevent the injected steam from being cooled, the superheated steam is heated to the steam chamber through the first steam inlet 105, the steam enters the reflux chamber after circulating through the copper pipe 104, and then is discharged and recycled through the reflux port 107, and the bypass valve 208 is used for closing the inner cavity of the bypass pipe 206.
[0032] In use, the first steam inlet 105 is used for communicating with a superheated steam pipeline, the second steam inlet 106 is used for communicating with a saturated steam pipeline, the superheated steam can be used when heating the gas, the saturated steam can be used when cleaning the equipment, the partition plate 108 divides the inner cavity of the first end cover 102 into a steam chamber and a reflux chamber, so that the reflux steam can prevent the injected steam from being cooled, the superheated steam is heated to the steam chamber through the first steam inlet 105, the steam enters the reflux chamber after circulating through the copper pipe 104, and then is discharged and recycled through the reflux port 107, the shell 101, the first end cover 102 and the second end cover 103 are used for providing a closed heating space, the copper pipe 104 is used for circulating the steam, the catalyst is added to the inner cavity of the second end cover 103 through the catalyst inlet 201, the crude synthesis gas is added to the inner cavity of the second end cover 103 through the communication pipe 205, is heated through the heat of the steam, and the mixed gas after heating is discharged into the shift converter through the furnace inlet pipe 203, the flow rate of the furnace inlet is adjusted through the shut-off valve 204, so that the furnace inlet temperature can be controlled, the low-temperature activity of the shift catalyst is effectively utilized by controlling the shift converter inlet temperature, and the service life of the catalyst is prolonged.
[0033] The standard parts used in the application file can be purchased from the market, and can be ordered according to the description and drawings, and the specific connection mode of each part adopts the conventional bolt, rivet, welding and other conventional means in the prior art, the mechanical, parts and equipment adopt the conventional type in the prior art, the control mode is automatically controlled through the controller, and the control circuit of the controller can be realized by simple programming of the person skilled in the art, which belongs to the common knowledge in the art, and the application is mainly used to protect the mechanical device, so the control mode and circuit connection are not explained in detail.
[0034] Although the utility model has disclosed as above with preferred embodiments, it is not used to limit the utility model. Those skilled in the art without departing from the spirit and scope of the utility model can make various changes and decorations. Therefore, the protection scope of the utility model is defined by the claims.
Claims
1. A shift furnace heat exchange device for a methanol synthesis plant, comprising a heating assembly (1), characterized in that: The heating assembly (1) comprises a shell (101), a first end cover (102), a second end cover (103) and a copper pipe (104), the first end cover (102) and the second end cover (103) are respectively located at two ends of the shell (101), the copper pipe (104) is installed in the inner cavity of the shell (101), the surface of the heating assembly (1) is mounted with an air inlet assembly (2), the air inlet assembly (2) comprises a catalyst inlet (201), an exhaust port (202), an inlet pipe (203), a cut-off valve (204), a communication pipe (205), a bypass pipe (206), a temperature sensor (207) and a bypass valve (208), the inlet pipe (203) and the communication pipe (205) are respectively located at the upper end and the lower end of the surface of the second end cover (103), and are in communication with the inner cavity of the second end cover (103), the two ends of the bypass pipe (206) are in communication with the inlet pipe (203) and the communication pipe (205), the cut-off valve (204) and the temperature sensor (207) are mounted on the surface of the inlet pipe (203), and the end of the inlet pipe (203) away from the second end cover (103) is in communication with the inlet of the change furnace.
2. The shift converter heat exchange apparatus for a methanol synthesis apparatus according to claim 1, characterized by: The catalyst inlet (201) is located at the upper end of the surface of the shell (101), the exhaust port (202) is located at the lower end of the surface of the shell (101), and the catalyst inlet (201) and the exhaust port (202) are in communication with the inner cavity of the shell (101).
3. The shift converter heat exchange apparatus for a methanol synthesis apparatus according to claim 1, characterized by: The two ends of the shell (101) are in communication with the inner cavities of the first end cover (102) and the second end cover (103), and the first end cover (102) and the second end cover (103) are threadedly connected with the shell (101) by bolts.
4. The shift converter heat exchange apparatus for a methanol synthesis apparatus according to claim 1, characterized by: The heating assembly (1) further comprises a first steam inlet (105), a second steam inlet (106), a backflow port (107) and a partition plate (108), and the partition plate (108) is fixed in the inner cavity of the first end cover (102).
5. The shift converter heat exchange apparatus for a methanol synthesis unit as claimed in claim 4, wherein: The first steam inlet (105) and the backflow port (107) are both located at the upper end of the surface of the first end cover (102) and are in communication with the inner cavity of the first end cover (102), and the second steam inlet (106) is located at the lower end of the surface of the first end cover (102) and is in communication with the inner cavity of the first end cover (102).
6. The shift converter heat exchange apparatus for a methanol synthesis plant according to claim 1, characterized by: The bypass valve (208) is mounted on the surface of the bypass pipe (206), and the detection end of the temperature sensor (207) extends into the inner cavity of the inlet pipe (203).