CN210974546U - Device for mutual standby of sulfur injection pumps in MTO olefin cracking device - Google Patents
Device for mutual standby of sulfur injection pumps in MTO olefin cracking device Download PDFInfo
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- CN210974546U CN210974546U CN201921905603.0U CN201921905603U CN210974546U CN 210974546 U CN210974546 U CN 210974546U CN 201921905603 U CN201921905603 U CN 201921905603U CN 210974546 U CN210974546 U CN 210974546U
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Abstract
A device for mutually standby sulfur injection pumps in an MTO olefin cracking device comprises a sulfur injection tank, wherein an outlet pipeline of the sulfur injection tank is provided with a plurality of sulfur injection pumps, more than 3 sulfur injection pumps in a first group are respectively connected with injection points at the inlet of a reactor, more than 2 sulfur injection pumps in a second group are connected in parallel and then connected with the injection points at the outlet of the reactor, and pipelines for connecting the two sulfur injection pumps with the reactor are respectively provided with a valve; and the downstream of the valve of each sulfur injection pump in the first group is provided with a communicating pipeline which is connected to the downstream of the valve of the sulfur injection pump in the second group, and the communicating pipelines are respectively provided with a communicating valve. The utility model discloses a device realizes each sulfur pump of annotating through the connection of many notes sulfur pumps and pipeline each other for reserve, can realize annotating the online switching of sulfur pump when equipment trouble appears in wherein arbitrary platform notes sulfur pump, guarantees the reliability that sulphur was injected into and the steady operation of device conscientiously.
Description
Technical Field
The utility model belongs to the technical field of methyl alcohol system alkene (MTO), concretely relates to sulfur injection pump is each other for reserve device in MTO alkene cracker.
Background
A methanol-to-olefin (MTO) device is a device which takes methanol as a raw material and produces low-carbon olefins (ethylene and propylene) as target products. Wherein, the olefin cracking device takes C4-C8 heavy olefin products of a methanol-to-olefin device and an olefin separation device as raw materials to produce light olefin products taking ethylene and propylene as target components.
The olefin cracking device carries out selective hydrogenation treatment on the raw material through a hydrogenation reactor, gradually raises the temperature to the reaction temperature of cracking reaction, and then enters the cracking reactor for cracking reaction, and the target products in the cracking products mainly comprise ethylene and propylene. Due to the high reaction temperature, the temperature is typically controlled at 575 deg.C, at which the reactants in the high temperature line will form coke under catalysis of the iron. In order to prevent the inside of the high-temperature pipeline from coking, auxiliary agent dimethyl disulfide is injected into the high-temperature pipeline in the process design, the auxiliary agent can be decomposed at high temperature to generate hydrogen sulfide, and the hydrogen sulfide reacts with chromium in the pipeline to form a protective layer of chromium sulfide, so that the pipeline can be effectively prevented from coking.
The auxiliary agent dimethyl disulfide is injected through a sulfur injection pump, and a plurality of sulfur injection pumps are usually respectively arranged at the inlet and the outlet of the reactor to ensure the effective injection of the dimethyl disulfide. Therefore, the stability of the sulfur injection pump is important for the whole reaction process, and once the sulfur injection pump fails, the device is forced to stop.
Disclosure of Invention
An object of the utility model is to provide an among MTO olefin cracking device annotates sulphur pump each other and is for reserve device solution because of the trouble of the sulphur pump of annotating of reactor entry or the sulphur pump of annotating of reactor export, influences the technical problem of the steady operation of device, guarantees the effective injection of dimethyl disulfide, the device will many annotate sulphur pump formation and each other be reserve combination, can avoid the device to park through the online switch-over of equipment to the long period steady operation of assurance device improves production efficiency.
The utility model adopts the technical proposal that:
a device for mutually standby sulfur injection pumps in an MTO olefin cracking device comprises a sulfur injection tank and is characterized in that a plurality of sulfur injection pumps are arranged on an outlet pipeline of the sulfur injection tank, more than 3 sulfur injection pumps in a first group are respectively connected with injection points at the inlet of a reactor, more than 2 sulfur injection pumps in a second group are connected in parallel and then connected with the injection points at the outlet of the reactor, and valves are respectively arranged on pipelines connecting the two groups of sulfur injection pumps with the reactor; and the downstream of the valve of each sulfur injection pump in the first group is provided with a communicating pipeline which is connected to the downstream of the valve of the sulfur injection pump in the second group, and the communicating pipelines are respectively provided with a communicating valve.
Preferably, the first and second electrodes are formed of a metal,
the first group of sulfur injection pumps is 3, 2 are operated, and 1 is reserved;
the second group of sulfur injection pumps is 2, 1 runs and 1 stands for standby.
By adopting the device of the utility model, the first group and the second group of sulfur injection pumps respectively contain more than 1 spare device, and any 1 sulfur injection pump in the first group and the 2 nd group can form a device which is mutually spare; when any one sulfur injection pump has equipment failure, the online switching of the sulfur injection pump is realized through a simple operation process, the detection and maintenance work of failure and the like is completed, the standby purpose is realized, and the stable operation of the device is ensured.
Has the advantages that: the utility model discloses a mutual reserve device of sulphur pump is annotated to MTO olefin cracking unit, realizes each mutual reserve of sulphur pump of annotating through the connection of many sulphur pumps of annotating and pipeline, when equipment trouble appears in arbitrary sulphur pump of annotating wherein, through simple operation flow, realizes annotating the online switching of sulphur pump; the pumps in the sulfur injection pump set injected into the inlet and the outlet of the reactor are in standby, and the two pumps form a mutual standby relationship, so that the reliability of sulfur injection and the stable operation of the device are practically ensured.
Drawings
FIG. 1 is a schematic structural diagram of a device in which sulfur injection pumps are mutually standby in an MTO olefin cracking device according to the present invention;
the system comprises a sulfur injection tank 1, an outlet pipeline 2, a reactor inlet 1# sulfur injection pump 3, a reactor inlet 2# sulfur injection pump 4, a reactor inlet 3# sulfur injection pump 5, a reactor outlet 4# sulfur injection pump 6, a reactor outlet 5# sulfur injection pump 7, a 1# communication valve 8, a 2# communication valve 9, a 3# communication valve 10, valves 11, 12, 13 and 14, a 1# communication pipeline 15, a 2# communication pipeline 16 and a 3# communication pipeline 17.
Detailed Description
The following detailed description of the embodiments of the present invention is provided, but it should be noted that the scope of the present invention is not limited by the embodiments, but is defined by the appended claims.
The utility model discloses a mutual reserve device of sulfur injection pump in MTO alkene cracker, including annotating sulphur jar 1, through 5 sulfur injection pumps of outlet pipe line 2 connection, including first group sulfur injection pump, insert the 1# sulfur injection pump 3 of reactor entry, 2# sulfur injection pump 4 and 3# sulfur injection pump 5 (two open one is equipped with), second group sulfur injection pump, insert 4# sulfur injection pump 6 and 5# sulfur injection pump 7 (one open one is equipped with) of reactor exit, insert the reactor after 4# sulfur injection pump 6 and 5# sulfur injection pump 7 connect in parallel; valves 11, 12, 13 and 14 are respectively arranged on the connecting pipelines of the pumps. In the device, a 1# communication pipeline 15 is arranged at the downstream of a valve 13 and connected to the downstream of a valve 14 of a second group of sulfur injection pumps, a communication valve 8 is arranged on the communication pipeline 15, and the 3# sulfur injection pump 5 and the second group of sulfur injection pumps 6 and 7 can be mutually standby by controlling the communication valve 8;
a 2# communication pipeline 16 is arranged at the downstream of the valve 12 and connected to the downstream of a valve 14 of the second group of sulfur injection pumps, a communication valve 9 is arranged on the communication pipeline 16, and the 2# sulfur injection pump 4 and the second group of sulfur injection pumps 6 and 7 can be mutually standby by controlling the communication valve 9;
a3 # communication pipeline 17 is arranged at the downstream of the valve 11 and connected to the downstream of a valve 14 of the second group of sulfur injection pumps, a communication valve 10 is arranged on the communication pipeline 17, and the 1# sulfur injection pump 3 and the second group of sulfur injection pumps 6 and 7 can be mutually standby by controlling the communication valve 10.
In the device, the first group and the second group of sulfur injection pumps respectively comprise more than 1 spare device, and any 1 sulfur injection pump in the first group and the 2 nd group can form a device which is spare for each other; when any one sulfur injection pump has equipment failure, the online switching of the sulfur injection pumps can be realized through a simple operation process, for example, the 1# sulfur injection pump 3 or the 2# sulfur injection pump 4 has failure, the 4# sulfur injection pump 6 or the 5# sulfur injection pump 7 can be started, and the communication valve 10 or 9 is opened by utilizing the communication pipeline 16 or 17 to complete the switching of the sulfur injection pumps, so that mutual standby is realized.
Claims (3)
1. A device for mutually standby sulfur injection pumps in an MTO olefin cracking device comprises a sulfur injection tank, and is characterized in that a plurality of sulfur injection pumps are arranged on an outlet pipeline of the sulfur injection tank, more than 3 sulfur injection pumps in a first group are respectively connected with injection points at the inlet of a reactor, more than 2 sulfur injection pumps in a second group are connected with the injection points at the outlet of the reactor after being connected in parallel, and valves are respectively arranged on pipelines of the two groups of sulfur injection pumps connected with the reactor; and the downstream of the valve of each sulfur injection pump in the first group is provided with a communicating pipeline which is connected to the downstream of the valve of the sulfur injection pump in the second group, and the communicating pipelines are respectively provided with a communicating valve.
2. The MTO olefin cracking unit of claim 1, wherein the sulfur injection pumps of the first group are 3, 2 running and 1 standby.
3. The MTO olefin cracking unit of claim 1, wherein the sulfur injection pumps of the second group are 2, 1 running and 1 standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921905603.0U CN210974546U (en) | 2019-11-06 | 2019-11-06 | Device for mutual standby of sulfur injection pumps in MTO olefin cracking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921905603.0U CN210974546U (en) | 2019-11-06 | 2019-11-06 | Device for mutual standby of sulfur injection pumps in MTO olefin cracking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210974546U true CN210974546U (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921905603.0U Active CN210974546U (en) | 2019-11-06 | 2019-11-06 | Device for mutual standby of sulfur injection pumps in MTO olefin cracking device |
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| Country | Link |
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| CN (1) | CN210974546U (en) |
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2019
- 2019-11-06 CN CN201921905603.0U patent/CN210974546U/en active Active
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