CN217910365U

CN217910365U - Coke inhibitor production equipment system for inhibiting coking of light hydrocarbon cracking furnace tube

Info

Publication number: CN217910365U
Application number: CN202222353157.5U
Authority: CN
Inventors: 车小晶
Original assignee: Dongying Zhongmao Zhenghui New Materials Co ltd
Current assignee: Dongying Zhongmao Zhenghui New Materials Co ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2022-11-29
Anticipated expiration: 2032-09-05

Abstract

The utility model relates to a meticulous chemical technology field specifically is a but coke inhibitor production facility system for restraining coking of light hydrocarbon cracking boiler tube, including vulcanization reaction kettle, the recovery tower, still including raw materials refiner and product refiner, the inside impurity that carries in order to desorption raw materials of zeolite molecular sieve that is equipped with of raw materials refiner, reduce impurity to vulcanization reaction's influence, inside impurity and the harmful component of being equipped with active solid adsorbent in order to desorption coarse product of being equipped with of product refiner, production process safety ring protects, the recovery tower corrosion resisting capability is stronger, and be convenient for wash, increased the service life of recovery tower, but catalyst and alkane solution cyclic utilization in the reaction have reduced manufacturing cost, reduce resource consumption, the utility model discloses simple process has better economic benefits and wide application prospect.

Description

Coke inhibitor production equipment system for inhibiting coking of light hydrocarbon cracking furnace tube

Technical Field

The utility model relates to a meticulous chemical technology field specifically is a but coke inhibitor production facility system for restraining coking of lighter hydrocarbons cracking furnace tube.

Background

Among the methods for producing ethylene by cracking hydrocarbon raw materials, the tubular furnace steam cracking method accounts for more than 90%. The high-temperature thermal cracking of hydrocarbons inevitably generates byproduct coke, a coke scale layer is accumulated on the inner wall of a furnace tube, the heat transfer of the furnace tube is influenced, the energy consumption is increased (the cracking furnace accounts for 60 percent of the energy consumption for producing ethylene), the system pressure is increased, so that a pipeline is blocked, the coke is cleaned regularly, the short-period steam-air coke cleaning and the long-period mechanical or hydraulic coke cleaning are included, the frequent coke cleaning and the coke cleaning not only reduce the operating rate and reduce the operating rate by 2 to 10 percent, but also cause the furnace tube to be subjected to mechanical or thermal stress to generate creep voids or cracks, and the service life of the cracking furnace is shortened.

The addition of coking inhibitors to the cracking feedstock or dilution steam is a practical solution for current industrial applications. The mechanism for inhibiting coking is mainly as follows: the surface of the furnace tube is passivated, the catalytic effect of the tube wall is inhibited, the reaction process of free radicals is changed, and homogeneous reaction coking is inhibited; the gasification reaction is carried out between the catalytic steam and the coke layer, so that the coking amount is reduced; the physical form of the coke scale is changed to be loose and easy to remove, and the coking inhibitor commonly adopted in China at present is dimethyl disulfide which has strong pungent odor and toxicity and pollutes the environment during production and use, so that the production of the safe and environment-friendly coking inhibitor becomes one of the main research directions of petrochemical workers.

SUMMERY OF THE UTILITY MODEL

The utility model provides a coke inhibitor production facility system for restraining coking of light hydrocarbon cracking furnace tube, the concrete implementation mode is as follows:

a coke inhibitor production equipment system for inhibiting coking of a light hydrocarbon cracking furnace tube comprises a vulcanization reaction kettle, a recovery tower, a raw material refiner and a product refiner, wherein the raw material refiner is internally provided with a zeolite molecular sieve for removing impurities carried in raw materials, the product refiner is internally provided with an active solid adsorbent for removing impurities carried in a rough product,

mix C4 alkene through raw materials refiner and charge pump get into vulcanization reaction kettle, and catalyst, liquid sulphur and alkane solvent pass through in the feed inlet at vulcanization reaction kettle top enters into vulcanization reaction kettle, be equipped with in the vulcanization reaction kettle from inhaling the formula agitator in order to carry out stirring reaction, during the discharge gate of reactant from vulcanization reaction kettle bottom passes through the vacuum pump and gets into the recovery tower, obtain crude product after the recovery tower separation, recovery tower bottom and reboiler are connected, crude product gets into in the product refiner through reboiler and product pump, isolate refined product through the product refiner.

Further, catalyst steam and alkane solvent steam generated at the top of the recovery tower enter a buffer tank through a tower top condenser, the catalyst and the alkane solvent in the buffer tank are pumped into a vulcanization reaction kettle through a circulating pump, and partial condensate of the catalyst and the alkane solvent enters the recovery tower through a tower top reflux pump.

Further, the top of the reboiler is connected with a reboiler connecting port on the side wall of the recovery tower through a pipeline.

Further, retrieve the tower and include the cylindric tower body of cavity, the top of tower body sets up the upper cover, the upper cover is equipped with relief valve and gaseous phase export, and the bottom of tower body sets up the low head, and the low head bottom sets up the crowd's seat, crowd's seat below sets up the base, it arranges the material pipe to be equipped with between low head and the crowd's seat, still set up backward flow mouth, pressure sensors, liquid level sensor, temperature-sensing ware and feed inlet on the lateral wall of tower body.

Furthermore, the pressure sensor, the liquid level sensor and the temperature sensor are all made of corrosion-resistant materials.

Furthermore, the inner wall of the tower body is made of enamel materials.

Furthermore, an anti-vortex baffle is arranged in the lower seal head.

Furthermore, a first inspection hole is formed in the upper portion of the outer wall of the tower body.

Furthermore, the outer wall lower part of tower body is provided with liquid crystal display.

Further, from last diameter down grow gradually crowd's seat, set up second inspection hole and tail ear on the crowd's seat.

Owing to adopted above technical scheme, the beneficial technological effect of the utility model is that:

1. the production process of the utility model is environment-friendly and safe, the pollution problem in the production process is solved when the dimethyl disulfide is taken as a coking inhibitor, the active solid adsorbent is arranged in the product refiner to remove impurities carried in the rough product, the production process is safe and environment-friendly, and the product refiner has better economic benefit and wide application prospect;

2. the utility model discloses simple process, raw materials process raw materials refiner and charge pump get into vulcanization reaction kettle, catalyst, liquid sulphur and alkane solvent pass through in vulcanization reaction kettle's feed inlet at top gets into vulcanization reaction kettle, be equipped with in the vulcanization reaction kettle from inhaling formula agitator in order to stir the reaction, the reactant gets into the recovery tower through the vacuum pump from the discharge gate of vulcanization reaction kettle bottom, obtain crude product after the recovery tower separation, the recovery tower bottom is connected with the reboiler, crude product gets into in the product refiner through reboiler and product pump, isolate refined product through the product refiner;

3. the utility model discloses in set up the recovery tower, its pressure sensors, liquid level sensor and temperature-sensing ware are corrosion resistant material, and the tower body inner wall is enamel material, has stronger corrosion resistance, and the tower body inner wall easily washs, and heat transfer efficiency is high, long service life.

Drawings

FIG. 1 is a schematic structural diagram of a coke inhibitor production equipment system for inhibiting coking of a light hydrocarbon cracking furnace tube according to the present invention;

fig. 2 is a schematic structural diagram of the middle recovery tower of the present invention.

Description of the reference numerals:

1. a vulcanization reaction kettle, 2, a recovery tower, 3, a raw material refiner, 4, a product refiner, 5, a feeding pump, 6, a zeolite molecular sieve, 7, an active solid adsorbent, 8, a self-suction stirrer, 9, a vacuum pump, 10, a reboiler, 11, a product pump, 12, a buffer tank, 13, a circulating pump, 14, a reflux pump, 15, a reboiler connecting port, 16, a tower body, 17, an upper end enclosure, 18, a safety valve, 19, a gas phase outlet, 20, a lower end enclosure, 21, a group seat, 22, a base, 23, a discharge pipe, 24, a reflux port, 25, a pressure sensor, 26, a liquid level sensor, 27, a temperature sensor, 28, a feeding port, 29, an anti-vortex baffle, 30, a first inspection hole, 31, a liquid crystal display screen, 32, a second inspection hole, 33, a tail lug, 34 and a condenser.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings and examples:

it should be noted that the structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the efficacy that the present invention can produce and the purpose that the present invention can achieve.

In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for clarity of description only, and are not used to limit the scope of the present invention, and the relative relationship between the terms may be changed or adjusted without substantial technical changes.

The coke inhibitor production equipment system for inhibiting coking of the light hydrocarbon cracking furnace tube of the utility model is explained by combining the figure 1 and the figure 2:

a coke inhibitor production equipment system for inhibiting coking of a light hydrocarbon cracking furnace tube comprises a vulcanization reaction kettle 1, a recovery tower 2, a raw material refiner 3 and a product refiner 4, wherein a zeolite molecular sieve 6 is arranged in the raw material refiner 3 to remove impurities carried in raw materials, an active solid adsorbent 7 is arranged in the product refiner 4 to remove impurities carried in a rough product,

mix C4 alkene process raw materials refiner 3 and charge pump 5 get into vulcanization reaction kettle 1, and catalyst, liquid sulphur and alkane solvent pass through in the feed inlet at vulcanization reaction kettle 1 top enters into vulcanization reaction kettle 1, be equipped with in vulcanization reaction kettle 1 from inhaling formula agitator 8 in order to carry out the stirring reaction, the reactant passes through vacuum pump 9 from the discharge gate of vulcanization reaction kettle 1 bottom and gets into recovery tower 2, obtain crude product after recovery tower 2 separates, recovery tower 2 bottom is connected with reboiler 10, crude product gets into in product refiner 4 through reboiler 10 and product pump 11, isolate refined product through product refiner 4.

Catalyst steam, alkane solvent steam and olefin steam generated at the top of the recovery tower 2 enter the buffer tank 12 through the tower top condenser 34, the catalyst, the alkane solvent and the olefin solvent in the buffer tank 12 are pumped into the vulcanization reaction kettle 1 through the circulating pump 13, and partial condensate of the catalyst, the alkane solvent and the olefin solvent enters the recovery tower 2 through the tower top reflux pump 14.

The reboiler 10 is connected at the top thereof to a reboiler connection port 15 formed in the side wall of the recovery column 2 through a pipeline.

Recovery tower 2 includes the cylindric tower body 16 of cavity, and the top of tower body 16 sets up upper cover 17, upper cover 17 is equipped with relief valve 18 and gaseous phase export 19, and the bottom of tower body 16 sets up low head 20, and low head 20 bottom sets up crowd's seat 21, crowd's seat 21 below sets up base 22, be equipped with blow-off pipe 23 between low head 20 and the crowd's seat 21, still set up return opening 24, pressure sensors 25, liquid level sensor 26, temperature-sensing ware 27 and feed inlet 28 on the lateral wall of tower body 16.

The pressure sensor 25, the liquid level sensor 26 and the temperature sensor 27 are all made of corrosion-resistant materials, so that the recovery tower 2 is strong in corrosion resistance, and the service life of the device is prolonged.

The inner wall of the tower body 16 is made of enamel materials, the recovery tower 2 is convenient to clean, the heat transfer efficiency is high, and the service life is long.

An anti-vortex baffle 29 is arranged in the lower seal head 20, so that the recovery tower 2 is prevented from being damaged due to overlarge fluid impact.

The upper part of the outer wall of the tower body 16 is provided with a first inspection hole 30, which is convenient for the maintenance of the tower body 16.

The lower part of the outer wall of the tower body 16 is provided with a liquid crystal display screen 31, and an operator can observe the pressure, the liquid level and the temperature in the tower body 16 through the liquid crystal display screen 31.

The diameter of crowd's seat 21 is from last down grow gradually, be equipped with second inspection hole 32 and tail ear 33 on the crowd's seat 21, be convenient for overhaul crowd's seat 21, tower body 16 stability is strong.

The utility model discloses the working process: the utility model discloses select mixed C4 alkene as the raw materials, mix in C4 alkene gets into raw materials refiner 3, impurity in the mixed C4 alkene of 6 desorption of zeolite molecular sieve, reduce the influence of impurity to vulcanization reaction, the mixed C4 alkene after the purification gets into vulcanization reation kettle 1, catalyst, liquid sulphur and alkane solvent enter into vulcanization reation kettle 1 through the feed inlet at vulcanization reation kettle 1 top, it reacts to add the alkane solvent, be convenient for control reaction process's temperature and pressure, be equipped with in the vulcanization reation kettle 1 from inhaling formula agitator 8 in order to carry out stirring reaction, the reactant gets into recovery tower 2 through vacuum pump 9 from the discharge gate of vulcanization reation kettle 1 bottom, catalyst steam and the alkane solvent steam that recovery tower 2 top produced pass through top of the tower condenser 34 and get into in buffer tank 12, catalyst and alkane solvent in the buffer tank 12 squeeze into vulcanization reation kettle 1 through circulating pump 13, for recycling, manufacturing cost has been reduced, resource consumption has been reduced, partial catalyst and the condensate of alkane solvent pass through top of the tower reflux pump 14 and get into in recovery tower 2, guarantee the gaseous phase reflux in the recovery tower 2 obtains crude product, recovery tower 2, it is equipped with the crude product and the reboiler that the crude product is connected in the environment-friendly product 10 to carry out the reboiler in the refined product of 10 to carry out the refined product of the reboiler that the harmful thing of the refined product.

Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, and that the scope of the invention is defined by the appended claims.

Claims

1. The utility model provides a coke inhibitor production facility system for restraining coking of lighter hydrocarbons cracking furnace tube, includes vulcanization reaction kettle (1), recovery tower (2), its characterized in that: also comprises a raw material refiner (3) and a product refiner (4), wherein the raw material refiner (3) is internally provided with a zeolite molecular sieve (6) to remove impurities carried in the raw material, the product refiner (4) is internally provided with an active solid adsorbent (7) to remove impurities carried in a crude product,

raw materials enter a vulcanization reaction kettle (1) through a raw material refiner (3) and a feed pump (5), a catalyst, liquid sulfur and an alkane solvent enter the vulcanization reaction kettle (1) through a feed inlet at the top of the vulcanization reaction kettle (1), a self-suction stirrer (8) is arranged in the vulcanization reaction kettle (1) to perform stirring reaction, reactants enter a recovery tower (2) through a vacuum pump (9) from a discharge outlet at the bottom of the vulcanization reaction kettle (1), a crude product is obtained after separation of the recovery tower (2), the bottom of the recovery tower (2) is connected with a reboiler (10), the crude product enters a product refiner (4) through the reboiler (10) and a product pump (11), and a refined product is separated out through the product refiner (4).

2. The coke inhibitor production facility system for inhibiting coking of a light hydrocarbon cracking furnace tube according to claim 1, wherein: catalyst steam and alkane solvent steam generated at the top of the recovery tower (2) enter a buffer tank (12) through an overhead condenser (34), the catalyst and the alkane solvent in the buffer tank (12) are pumped into a vulcanization reaction kettle (1) through a circulating pump (13), and partial condensate of the catalyst and the alkane solvent enters the recovery tower (2) through an overhead reflux pump (14).

3. The coke inhibitor production facility system for inhibiting coking of light hydrocarbon cracking furnace tubes as claimed in claim 1, wherein: the top of the reboiler (10) is connected with a reboiler connecting port (15) on the side wall of the recovery tower (2) through a pipeline.

4. The coke inhibitor production facility system for inhibiting coking of light hydrocarbon cracking furnace tubes as claimed in claim 1, wherein: recovery tower (2) are including hollow cylinder tower body (16), and the top of tower body (16) sets up upper cover (17), upper cover (17) are equipped with relief valve (18) and gaseous outlet (19), and the bottom of tower body (16) sets up low head (20), and low head (20) bottom sets up group seat (21), group seat (21) below sets up base (22), be equipped with between low head (20) and group seat (21) and arrange material pipe (23), still set up backward flow mouth (24), pressure sensors (25), liquid level sensors (26), temperature-sensing ware (27) and feed inlet (28) on the lateral wall of tower body (16).

5. The coke inhibitor production facility system for inhibiting coking of a light hydrocarbon cracking furnace tube according to claim 4, wherein: the pressure sensor (25), the liquid level sensor (26) and the temperature sensor (27) are all made of corrosion-resistant materials.

6. The coke inhibitor production facility system for inhibiting coking of light hydrocarbon cracking furnace tubes as claimed in claim 4, wherein: the inner wall of the tower body (16) is made of enamel materials.

7. The coke inhibitor production facility system for inhibiting coking of light hydrocarbon cracking furnace tubes as claimed in claim 4, wherein: an anti-vortex baffle (29) is arranged in the lower end enclosure (20).

8. The coke inhibitor production facility system for inhibiting coking of a light hydrocarbon cracking furnace tube according to claim 4, wherein: and a first inspection hole (30) is formed in the upper part of the outer wall of the tower body (16).

9. The coke inhibitor production facility system for inhibiting coking of a light hydrocarbon cracking furnace tube according to claim 4, wherein: and a liquid crystal display screen (31) is arranged at the lower part of the outer wall of the tower body (16).

10. The coke inhibitor production facility system for inhibiting coking of light hydrocarbon cracking furnace tubes as claimed in claim 4, wherein: the diameter of the group seat (21) is gradually increased from top to bottom, and a second inspection hole (32) and a tail lug (33) are arranged on the group seat (21).