Newly-added structure for testing performance of ethylene epoxidized silver catalyst

Abstract

The utility model provides a newly-added structure for testing the performance of an ethylene epoxidized silver catalyst. The newly-added structure comprises a side line reactor, a boiler feed water heater, a deoxidizing flash tank, a boiler feed water and feed preheater, a reactor outlet cooler and a reactor gas cooler steam pocket, circulating gas is introduced into a top inlet pipeline of the side-line reactor, a bottom outlet pipeline of the side-line reactor is connected with a first inlet pipeline of the reactor outlet cooler, and the circulating gas is discharged from the first outlet pipeline of the reactor outlet cooler; research and development and performance testing of the ethylene oxide oxidation reaction catalyst can be realized, and scientific research and innovation achievements are improved; reliable basis and data support are provided for optimization of an oxidation reaction system, the economical efficiency is improved, and changes according to market conditions are effectively coped with; a reaction system is optimized, and the long-term operation performance of the catalyst is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ethylene oxide oxidation reaction, especially a new structure for ethylene epoxidation silver catalyst performance test. BACKGROUND

[0002] Ethylene glycol device uses ethylene and oxygen as raw materials, and circulates in the reactor, and the main reaction generates ethylene oxide, in order to optimize the long-term operation performance of the catalyst, reduce the material consumption and energy consumption of the device, and improve the economic efficiency of the device, and therefore the catalyst performance research and development work of the ethylene glycol device is carried out.

[0003] In order to provide technical support in the test aspect for the research and development of ethylene oxide oxidation reaction catalyst, and make the test process meet the function of online optimization of the oxidation reaction system, a micro test line evaluation device is designed in parallel with the existing oxidation reactor. UTILITY MODEL CONTENT

[0004] In view of the above problems, the purpose of the present application is to provide a new structure for ethylene epoxidation silver catalyst performance test, which can realize the research and development and performance test of ethylene oxide oxidation reaction catalyst, improve scientific research and innovation achievements, provide reliable basis and data support for the optimization of the oxidation reaction system, improve the economic efficiency, effectively respond to the market situation changes, optimize the reaction system and improve the long-term operation performance of the catalyst.

[0005] The carrier is an important part of the research and development of the supported catalyst, which supports the active component, prevents the agglomeration of low melting point materials, disperses the noble metal, and directly participates in the reaction. The above requirements for performance require that the selected carrier has sufficient rigidity and stable structure to avoid being broken by gas and liquid flow, so the carrier research has always been an important part of silver catalyst research. In order to prevent the occurrence of side reactions in industry, inert alpha-Al2O3 with low specific surface area and few pores is preferentially selected as the carrier. The selection and collocation of the carrier and the additive, the adjustment of the process operation parameters of the catalyst performance, the exploratory adjustment of the amount of inhibitor, the replacement of different types of catalysts, and the development of terminal new products with high performance and market requirements through repeated test data comparison.

[0006] To achieve the above part or all purposes or other purposes, the application provides the following technical scheme: a new structure for performance test of ethylene epoxidation silver catalyst, comprising a side reactor, a boiler feedwater heater, an oxygen removal flash tank, a boiler feedwater feed preheater, a reactor outlet cooler and a reactor gas cooler steam drum; a top inlet pipeline of the side reactor is connected to circulating gas, a bottom outlet pipeline of the side reactor is connected to a No.1 inlet pipeline of the reactor outlet cooler, and a No.1 outlet pipeline of the reactor outlet cooler discharges circulating gas; an outlet pipeline of the reactor gas cooler steam drum is connected to a No.2 inlet pipeline of the reactor outlet cooler, and a No.2 outlet pipeline of the reactor outlet cooler discharges boiler water; an upper outlet pipeline of the side reactor is connected to a first inlet pipeline of the boiler feedwater heater, a first outlet pipeline of the boiler feedwater heater is connected to an inlet pipeline of the oxygen removal flash tank; a second inlet pipeline of the boiler feedwater heater is connected to boiler water, and a second outlet pipeline of the boiler feedwater heater is connected to an inlet pipeline of the boiler feedwater feed preheater, and an outlet pipeline of the boiler feedwater feed preheater is connected to a lower inlet pipeline of the side reactor.

[0007] Further, the side reactor comprises four parallel side reactors, namely side reactor A, side reactor B, side reactor C and side reactor D, the top inlet pipelines of the four side reactors are connected in parallel, the bottom outlet pipelines of the four side reactors are connected in parallel, the upper inlet pipelines of the four side reactors are connected in parallel, and the lower outlet pipelines of the four side reactors are connected in parallel.

[0008] Further, a high-pressure boiler feedwater pump is further included, and the second inlet pipeline of the boiler feedwater heater is provided with the high-pressure boiler feedwater pump.

[0009] Further, a boiler feedwater booster pump is further included, and the No.2 inlet pipeline of the reactor outlet cooler is provided with the boiler feedwater booster pump.

[0010] Compared with the prior art, the application has the following beneficial effects: the side reactor is connected in parallel with the existing oxidation reactor and is externally hung for performance test; one pipeline is drawn from each of the inlet and outlet pipelines of the device reactor and is connected to the test reactor; in order to adjust the reaction temperature, a new set of condensate system is added, and the steam pipe network and the boiler feedwater system need to be respectively cut off.

[0011] By providing a temperature-adjustable system for the existing pipeline, the temperature of the side reactor can be adjusted, and the experimental conditions can be realized.

[0012] The development and performance test of the ethylene oxide oxidation reaction catalyst can be realized, the scientific research and innovation achievements are improved, reliable basis and data support are provided for the optimization of the oxidation reaction system, the economic efficiency is improved, the market situation is effectively responded to, the reaction system is optimized, and the long-term operation performance of the catalyst is improved. Attached Figure Description

[0013] Fig. 1 This is a flowchart of the present invention;

[0014] Fig. 2 A flow chart showing the connection of a side-stream reactor within the overall unit;

[0015] Fig. 3 This is a flowchart illustrating the connection between this utility model and the existing device.

[0016] In the figure: 1. Side-line reactor; 2. Boiler feed water heater; 3. Deaerator flash tank; 4. High-pressure boiler feed water pump; 5. Boiler feed water preheater; 6. Reactor outlet cooler; 7. Reactor gas cooler steam drum; 8. Boiler feed water booster pump; 9. New structure of this utility model. Detailed Implementation

[0017] To make the structure and function of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0018] See appendix Figs. 1-3 A novel structure for performance testing of silver epoxide catalysts for ethylene includes a side-stream reactor 1, a boiler feedwater heater 2, a deaerator flash tank 3, a boiler feedwater preheater 5, a reactor outlet cooler 6, and a reactor gas cooler steam drum 7. Circulating gas is introduced through the top inlet pipe of the side-stream reactor 1, and the bottom outlet pipe of the side-stream reactor 1 is connected to the first inlet pipe of the reactor outlet cooler 6. Circulating gas is discharged through the first outlet pipe of the reactor outlet cooler 6. The outlet pipe of the reactor gas cooler steam drum 7 is connected to the reactor outlet cooling system. The second inlet pipeline of reactor 6 discharges boiler water; the second outlet pipeline of reactor outlet cooler 6 discharges boiler water; the upper outlet pipeline of side-line reactor 1 is connected to the first inlet pipeline of boiler feed water heater 2, and the first outlet pipeline of boiler feed water heater 2 is connected to the inlet pipeline of deaerator flash tank 3; the second inlet pipeline of boiler feed water heater 2 is supplied with boiler water, and the second outlet pipeline of boiler feed water heater 2 is connected to the inlet pipeline of boiler feed water preheater 5, and the outlet pipeline of boiler feed water preheater 5 is connected to the lower inlet pipeline of side-line reactor 1.

[0019] Furthermore, the side-line reactor 1 includes four side-line reactors connected in parallel: side-line reactor A, side-line reactor B, side-line reactor C, and side-line reactor D. The top inlet pipelines of the four side-line reactors are connected in parallel, the bottom outlet pipelines of the four side-line reactors are connected in parallel, the upper inlet pipelines of the four side-line reactors are connected in parallel, and the lower outlet pipelines of the four side-line reactors are connected in parallel.

[0020] Further, a high-pressure boiler feed water pump 4 is further included; the high-pressure boiler feed water pump 4 is arranged on the second inlet pipeline of the boiler feed water heater 2.

[0021] Further, a boiler feed water booster pump 8 is further included; the boiler feed water booster pump 8 is arranged on the second inlet pipeline of the reactor outlet cooler 6.

[0022] Further, the initial boiler water is heated by the boiler feed water heater 2, and then heated by the steam of the boiler feed water feed preheater 5, and then heated by the electric heater to control the temperature of the boiler water, and then flows into the lower inlet pipeline of the side reactor 1, and then the temperature of the boiler water is reduced in the side reactor 1, and then flows out from the upper outlet pipeline of the side reactor 1, and then flows into the boiler feed water heater 2, and the temperature of the boiler water flowing into the boiler feed water heater 2 is higher than the temperature of the initial boiler water, and the initial boiler water is heated in the boiler feed water heater 2.

[0023] The above disclosure is only the preferred embodiment of the present application, and of course cannot limit the scope of the right of the present application, so the equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A new structure for ethylene epoxidation silver catalyst performance test, characterized in that: The side reactor (1), the boiler feed water heater (2), the deaerating flash tank (3), the boiler feed water feed preheater (5), the reactor outlet cooler (6), and the reactor gas cooler drum (7) are included; the top inlet pipeline of the side reactor (1) is connected with the circulating gas, the bottom outlet pipeline of the side reactor (1) is connected with the No.1 inlet pipeline of the reactor outlet cooler (6), the No.1 outlet pipeline of the reactor outlet cooler (6) discharges the circulating gas; the outlet pipeline of the reactor gas cooler drum (7) is connected with the No.2 inlet pipeline of the reactor outlet cooler (6), the No.2 outlet pipeline of the reactor outlet cooler (6) discharges the boiler water; the upper outlet pipeline of the side reactor (1) is connected with the first inlet pipeline of the boiler feed water heater (2), the first outlet pipeline of the boiler feed water heater (2) is connected with the inlet pipeline of the deaerating flash tank (3); the second inlet pipeline of the boiler feed water heater (2) is connected with the boiler water, the second outlet pipeline of the boiler feed water heater (2) is connected with the inlet pipeline of the boiler feed water feed preheater (5), and the outlet pipeline of the boiler feed water feed preheater (5) is connected with the lower inlet pipeline of the side reactor (1).

2. The new structure for performance test of ethylene epoxidation silver catalyst according to claim 1, characterized in that: The side reactor (1) includes four parallel side reactors, namely, side reactor A, side reactor B, side reactor C and side reactor D; the top inlet pipelines of the four side reactors are connected in parallel, the bottom outlet pipelines of the four side reactors are connected in parallel, the upper inlet pipelines of the four side reactors are connected in parallel, and the lower outlet pipelines of the four side reactors are connected in parallel.

3. The new structure for performance test of ethylene epoxidation silver catalyst according to claim 1, characterized in that: The high-pressure boiler feed water pump (4) is further included; the high-pressure boiler feed water pump (4) is arranged on the second inlet pipeline of the boiler feed water heater (2).

4. The new structure for performance test of ethylene epoxidation silver catalyst according to claim 1, characterized in that: The boiler feed water booster pump (8) is further included; the boiler feed water booster pump (8) is arranged on the No.2 inlet pipeline of the reactor outlet cooler (6).

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