A high-pressure saturated water utilization system for styrene production

Abstract

The utility model relates to a high-pressure saturated water utilization system for styrene production. A buffer mechanism is arranged in a flash tank, and the buffer mechanism comprises two mounting blocks, a positioning rod fixedly connected between the two mounting blocks, two sliding blocks sleeved on the positioning rod, a buffer plate and a spring. The mounting block is fixedly arranged on the inner wall of the flash tank, the two mounting blocks are arranged at intervals, the buffer plate is vertically arranged in the flash tank, a hinged rod is arranged between the buffer plate and the sliding block, one end of the hinged rod is hinged to the buffer plate, and the other end of the hinged rod is hinged to the sliding block, and the spring is sleeved on the positioning rod. As high-pressure saturated water enters the flash tank to generate steam, the steam impacts on the buffer plate of the buffer mechanism, and the buffer plate compresses the spring to relieve the impact force brought by the steam, thereby effectively preventing the steam from scouring the inner wall of the flash tank, avoiding the inner wall of the flash tank from being damaged by scouring for a long time, and extending the service life of the flash tank.

Description

Technical Field

[0001] The utility model belongs to the technical field of styrene production, in particular to a high-pressure saturated water utilization system for styrene production. Background Art

[0002] The industrial production of styrene is to use benzene and ethylene as raw materials to first undergo an alkylation reaction under certain conditions to generate ethylbenzene, then mix ethylbenzene with steam in a certain proportion, dehydrogenate under certain conditions, and separate the dehydrogenated product into oil and water to extract styrene after cooling. At present, when producing styrene, ethylbenzene needs to be mixed with excess steam. Excess steam enters the reactor to produce high-pressure saturated water. Usually, the high-pressure saturated water in the reactor is directly discharged into the condensate tank for recycling. Since the high-pressure saturated water contains a large amount of heat energy, directly discharging the high-pressure saturated water into the condensate tank will result in a waste of heat energy. The utility model patent with announcement number CN215783267U discloses a styrene steam delivery system, which can utilize the heat in the high-pressure saturated water through a flash tank, but the steam formed when the flash tank flashes will flush the inner wall of the flash tank, and long-term use will damage the flash tank and reduce the service life. Therefore, there are still shortcomings and deficiencies in the prior art. Utility Model Content

[0003] The utility model aims to provide a high-pressure saturated water utilization system for styrene production to solve the above problems.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is:

[0005] A high-pressure saturated water utilization system for styrene production is provided, comprising a first reactor, a second reactor, a flash tank and a steam generator, wherein the first reactor is connected to the second reactor, the second reactor is connected to the flash tank, the steam generator is connected to both the flash tank and the second reactor, a liquid inlet pipe is connected to the side wall of the flash tank, an air outlet pipe is connected to the top of the flash tank, a liquid outlet pipe is connected to the bottom of the flash tank, a buffer mechanism is arranged in the flash tank, the buffer mechanism comprises two mounting blocks, a positioning rod fixedly connected between the two mounting blocks, two sliders sleeved on the positioning rod, a buffer plate and a spring, the mounting blocks are fixedly arranged on the inner wall of the flash tank, the two mounting blocks are arranged at intervals, the buffer plate is vertically arranged in the flash tank, a hinged rod is arranged between the buffer plate and the slider, one end of the hinged rod is hinged to the buffer plate, the other end of the hinged rod is hinged to the slider, and the spring is sleeved on the positioning rod.

[0006] Furthermore, one end of the gas outlet pipe away from the flash tank is connected to the steam delivery pipe through a gas delivery pipe.

[0007] Furthermore, one end of the liquid outlet pipe away from the flash tank is connected to the steam generator through a liquid infusion pipe.

[0008] Furthermore, a first feed pipe is provided on the first reactor, and the first feed pipe is provided on the side of the first reactor.

[0009] Furthermore, a first delivery pipe is provided between the first reactor and the second reactor, and the first reactor and the second reactor are connected through the first delivery pipe.

[0010] Furthermore, a steam delivery pipe is provided between the steam generator and the second reactor.

[0011] Furthermore, a second delivery pipe is provided between the second reactor and the flash tank, and the second reactor and the flash tank are connected through the second delivery pipe.

[0012] Furthermore, the spring is located between the sliding block and the mounting block.

[0013] By adopting the above technical solution, the beneficial effects of the utility model are:

[0014] In the high-pressure saturated water utilization system for styrene production provided by the utility model, a buffer mechanism is arranged in a flash tank, and the buffer mechanism comprises two mounting blocks, a positioning rod fixedly connected between the two mounting blocks, two sliding blocks sleeved on the positioning rod, a buffer plate and a spring, the mounting block is fixedly arranged on the inner wall of the flash tank, the two mounting blocks are arranged at intervals, the buffer plate is vertically arranged in the flash tank, a hinged rod is arranged between the buffer plate and the sliding block, one end of the hinged rod is hinged to the buffer plate, and the other end of the hinged rod is hinged to the sliding block, and the spring is sleeved on the positioning rod, as the high-pressure saturated water enters the flash tank to generate steam, the steam impacts on the buffer plate of the buffer mechanism, and the buffer plate compresses the spring to relieve the impact force brought by the steam, thereby effectively preventing the steam from scouring the inner wall of the flash tank, avoiding the inner wall of the flash tank from being damaged by scouring for a long time, and extending the service life of the flash tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a high-pressure saturated water utilization system for styrene production in the utility model.

[0016] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the middle flash tank.

[0017] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0018] Figure numerals: 10, first reactor; 11, first feed pipe; 12, first delivery pipe; 13, second feed pipe; 20, second reactor; 21, second delivery pipe; 30, flash tank; 31, liquid inlet pipe; 32, gas outlet pipe; 33, liquid outlet pipe; 34, buffer mechanism; 341, mounting block; 342, positioning rod; 343, slider; 344, buffer plate; 345, spring; 346, hinged rod; 40, steam generator; 41, steam delivery pipe; 42, gas pipe; 43, liquid delivery pipe; 50, storage tank; 51, discharge pipe. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basics of the utility model in a schematic manner, so it only shows the structure related to the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] like Figure 1 As shown, the utility model provides a high-pressure saturated water utilization system for styrene production, which is used to utilize the high-pressure saturated water generated in the production and processing of styrene, which can save water resources, reduce waste, and lower production costs.

[0021] like Figure 1 As shown, the high-pressure saturated water utilization system for styrene production provided by the utility model includes a first reactor 10, a second reactor 20, a flash tank 30 and a steam generator 40. The first reactor 10 is connected to the second reactor 20, the second reactor 20 is connected to the flash tank 30, and the steam generator 40 is connected to both the flash tank 30 and the second reactor 20.

[0022] The method for industrial production of styrene is to use benzene and ethylene as raw materials, first carry out alkylation reaction under certain conditions to produce ethylbenzene, then mix ethylbenzene with steam in a certain proportion and dehydrogenate under certain conditions. The product after ethylbenzene dehydrogenation is cooled and separated from oil and water to extract styrene.

[0023] like Figure 1As shown, the first reactor 10 is used for reacting benzene and ethylene, and benzene and ethylene react in the first reactor 10 to generate ethylbenzene. The first reactor 10 is provided with a first feed pipe 11 and a second feed pipe 13, and the ethylene material and the benzene material to be reacted are respectively added into the first reactor 10 through the first feed pipe 11 and the second feed pipe 13, and the first feed pipe 11 and the second feed pipe 13 are both arranged on the side of the first reactor 10. A first conveying pipe 12 is arranged between the first reactor 10 and the second reactor 20, and the first reactor 10 and the second reactor 20 are connected through the first conveying pipe 12, and the ethylbenzene generated by the reaction of benzene and ethylene in the first reactor 10 is conveyed to the second reactor 20 through the first conveying pipe 12.

[0024] like Figure 1 As shown, a steam conveying pipe 41 is provided between the steam generator 40 and the second reactor 20, and the steam generator 40 is connected to the second reactor 20 through the steam conveying pipe 41. The steam generator 40 is used to generate high-temperature steam. The steam generated by the steam generator 40 is conveyed to the second reactor 20 through the steam conveying pipe 41, and the ethylbenzene in the second reactor 20 undergoes a dehydrogenation reaction under the action of excess steam.

[0025] like Figure 1 As shown, the second reactor 20 is used for dehydrogenation reaction of ethylbenzene with steam. The ethylbenzene in the second reactor 20 undergoes dehydrogenation reaction under the action of a catalyst and the introduction of excess steam. Excess steam entering the second reactor 20 will produce high-pressure saturated water.

[0026] The high-pressure saturated water utilization system for styrene production provided by the utility model further comprises a storage tank 50 , and the styrene produced by the dehydrogenation reaction of ethylbenzene and steam in the second reactor 20 is transported into the storage tank 50 through a discharge pipe 51 for storage.

[0027] like Figure 1 As shown, a second delivery pipe 21 is provided between the second reactor 20 and the flash tank 30 , and the second reactor 20 and the flash tank 30 are connected via the second delivery pipe 21 , and the second delivery pipe 21 is used to deliver the high-pressure saturated water generated in the second reactor 20 into the flash tank 30 .

[0028] like Figure 1 As shown, a liquid inlet pipe 31 is connected to the side wall of the flash tank 30, an air outlet pipe 32 is connected to the top of the flash tank 30, and the end of the air outlet pipe 32 away from the flash tank 30 is connected to the steam delivery pipe 41 through the air delivery pipe 42, and a liquid outlet pipe 33 is connected to the bottom of the flash tank 30, and the end of the liquid outlet pipe 33 away from the flash tank 30 is connected to the steam generator 40 through the liquid delivery pipe 43.

[0029] like Figure 2 and Figure 3 As shown, a buffer mechanism 34 is provided in the flash tank 30, and the buffer mechanism 34 includes two mounting blocks 341, a positioning rod 342 fixedly connected between the two mounting blocks 341, two sliders 343 sleeved on the positioning rod 342, a buffer plate 344 and a spring 345. The mounting block 341 is fixedly arranged on the inner wall of the flash tank 30, the two mounting blocks 341 are arranged at intervals, and the buffer plate 344 is vertically arranged in the flash tank 30. A hinge rod 346 is provided between the buffer plate 344 and the slider 343, one end of the hinge rod 346 is hinged to the buffer plate 344, and the other end of the hinge rod 346 is hinged to the slider 343, and the spring 345 is sleeved on the positioning rod 342, and the spring 345 is located between the slider 343 and the mounting block 341. As high-pressure saturated water enters the flash tank 30 to generate steam, the steam impacts the buffer plate 344 of the buffer mechanism 34 , and the buffer plate 344 compresses the spring 345 to alleviate the impact force brought by the steam, so that the buffer mechanism 34 can play a buffering role.

[0030] The high-pressure saturated water utilization system for styrene production provided by the utility model comprises a first reactor 10, a second reactor 20 and a flash tank 30. The high-pressure saturated water in the second flash tank 30 enters the flash tank 30 and rapidly boils and vaporizes to generate steam, which is then transported into the second reactor 20. The heat energy in the saturated water can be effectively utilized, the utilization rate of the steam is improved, and the energy consumption is reduced. A buffer mechanism 34 is provided in the flash tank 30, and the buffer mechanism 34 includes two mounting blocks 341, a positioning rod 342 fixedly connected between the two mounting blocks 341, two sliders 343 sleeved on the positioning rod 342, a buffer plate 344 and a spring 345 sleeved on the positioning rod 342, and a hinge rod 346 is provided between the buffer plate 344 and the slider 343, one end of the hinge rod 346 is hinged to the buffer plate 344, and the other end of the hinge rod 346 is hinged to the slider 343. As high-pressure saturated water enters the flash tank 30 to generate steam, the steam impacts the buffer plate 344 of the buffer mechanism 34, and the buffer plate 344 compresses the spring 345 to relieve the impact force brought by the steam, thereby effectively preventing the steam from scouring the inner wall of the flash tank 30, avoiding the inner wall of the flash tank 30 from being scoured for a long time and being damaged, and extending the service life of the flash tank 30.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] The above is based on the ideal embodiment of the utility model. Through the above description, relevant staff can make various changes and modifications without departing from the scope of the utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A high-pressure saturated water utilization system for styrene production, characterized in that: The invention comprises a first reactor, a second reactor, a flash tank and a steam generator, wherein the first reactor is connected to the second reactor, the second reactor is connected to the flash tank, the steam generator is connected to both the flash tank and the second reactor, a liquid inlet pipe is connected to the side wall of the flash tank, an air outlet pipe is connected to the top of the flash tank, a liquid outlet pipe is connected to the bottom of the flash tank, a buffer mechanism is arranged in the flash tank, the buffer mechanism comprises two mounting blocks, a positioning rod fixedly connected between the two mounting blocks, two sliders sleeved on the positioning rod, a buffer plate and a spring, the mounting blocks are fixedly arranged on the inner wall of the flash tank, the two mounting blocks are arranged at intervals, the buffer plate is vertically arranged in the flash tank, a hinged rod is arranged between the buffer plate and the slider, one end of the hinged rod is hinged to the buffer plate, the other end of the hinged rod is hinged to the slider, and the spring is sleeved on the positioning rod.

2. A high-pressure saturated water utilization system for styrene production according to claim 1, characterized in that: One end of the gas outlet pipe away from the flash tank is connected to the steam delivery pipe through the gas delivery pipe.

3. A high-pressure saturated water utilization system for styrene production according to claim 1, characterized in that: One end of the liquid outlet pipe away from the flash tank is connected to the steam generator through a liquid infusion pipe.

4. A high-pressure saturated water utilization system for styrene production according to claim 1, characterized in that: The first reactor is provided with a first feed pipe, and the first feed pipe is arranged on the side of the first reactor.

5. A high-pressure saturated water utilization system for styrene production according to claim 1, characterized in that: A first delivery pipe is provided between the first reactor and the second reactor, and the first reactor and the second reactor are connected through the first delivery pipe.

6. A high-pressure saturated water utilization system for styrene production according to claim 1, characterized in that: A steam delivery pipe is arranged between the steam generator and the second reactor.

7. A high-pressure saturated water utilization system for styrene production according to claim 1, characterized in that: A second delivery pipe is provided between the second reactor and the flash tank, and the second reactor and the flash tank are communicated with each other through the second delivery pipe.

8. A high-pressure saturated water utilization system for styrene production according to claim 1, characterized in that: The spring is located between the slider and the mounting block.

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