阅读说明：本技术 一种mtbe产品脱硫后的重馏分废液回收利用装置 (Heavy fraction waste liquid recycle device after MTBE product desulfurization ) 是由 胡敏达 刘丰敏 李瑛� 王裕振 于 2019-10-29 设计创作，主要内容包括：本发明涉及一种MTBE产品脱硫后的重馏分废液回收利用装置,包括脱硫塔、回收罐和反应装置,脱硫塔底部设有重馏分废液出口,重馏分废液出口与回收罐进料口相通,回收罐顶部设有出气口,出气口与脱硫塔进气口相通,回收罐底部还有出料口,出料口通过连接加氢反应器；反应装置包括重油提升管反应器、气固分离系统和循环再生系统；气固分离系统包括旋风分离器、沉降器和汽提装置；循环再生系统包括待生斜管、再生器和再生斜管。本发明具有结构简单,使用方便,避免MTBE产品硫含量超标,降低含油污水的处理难度,实现重馏分废液的回收利用,节能环保等有益效果。(The invention relates to a heavy fraction waste liquid recycling device after MTBE product desulfurization, which comprises a desulfurizing tower, a recovery tank and a reaction device, wherein a heavy fraction waste liquid outlet is arranged at the bottom of the desulfurizing tower, the heavy fraction waste liquid outlet is communicated with a feed inlet of the recovery tank, an air outlet is arranged at the top of the recovery tank, the air outlet is communicated with an air inlet of the desulfurizing tower, a discharge hole is arranged at the bottom of the recovery tank, and the discharge hole is connected with a hydrogenation reactor; the reaction device comprises a heavy oil riser reactor, a gas-solid separation system and a circulating regeneration system; the gas-solid separation system comprises a cyclone separator, a settler and a steam stripping device; the cyclic regeneration system comprises a to-be-regenerated inclined pipe, a regenerator and a regeneration inclined pipe. The invention has the advantages of simple structure, convenient use, avoidance of the sulfur content of MTBE products exceeding the standard, reduction of the treatment difficulty of oily sewage, realization of the recycling of heavy fraction waste liquid, energy conservation, environmental protection and the like.)

1. The utility model provides a heavy ends waste liquid recycle device after MTBE product desulfurization which characterized in that: the recycling device comprises a desulfurizing tower (1), a recovery tank (2) and a reaction device, wherein a heavy fraction waste liquid outlet (3) is arranged at the bottom of the desulfurizing tower, the heavy fraction waste liquid outlet (3) is communicated with a feed inlet (5) on the recovery tank (2) through a first pipeline (4), a gas outlet (6) is arranged at the top of the recovery tank (2), the gas outlet (6) is communicated with a gas inlet (8) in the middle of the desulfurizing tower (1) through a second pipeline (7), a discharge hole (9) is also arranged at the bottom of the recovery tank (2), and the discharge hole (9) is connected with a hydrogenation reactor (11) through a third pipeline (10); the reaction device comprises a heavy oil riser reactor, a gas-solid separation system and a cyclic regeneration system, wherein the heavy oil riser reactor consists of a lower riser (12), a middle riser (13) and an upper riser (14) which are sequentially communicated from bottom to top, the bottom of the lower riser (12) is provided with a lifting steam inlet (15), the middle part of the lower riser (12) is provided with a catalyst inlet (16) and an oil inlet (17) positioned above the catalyst inlet (16), and the oil inlet (17) is connected with an outlet of the hydrogenation reactor (11); the gas-solid separation system comprises a cyclone separator (18), a settler (19) and a stripping device (20), the port of the riser (14) is communicated with the interior of the settler (19), the cyclone separator (18) and the settler (19) are both positioned above the stripping device (20), the upper end of the cyclone separator (18) is connected with a collection chamber (39), and the lower end of the cyclone separator (18) is connected with the stripping device (20); the circulating regeneration system comprises a to-be-regenerated inclined pipe (21), a regenerator (22) and a regeneration inclined pipe (23), wherein a catalyst outlet (24) is formed in the lower end of the stripping device (20), the regenerator (22) is communicated with the catalyst outlet (24) through the to-be-regenerated inclined pipe (21), one end of the regeneration inclined pipe (23) is communicated with the lower end of the regenerator (22), and the other end of the regeneration inclined pipe is communicated with the catalyst inlet (16).

2. The device of claim 1, wherein the device for recycling the heavy-fraction waste liquid after the desulfurization of the MTBE product comprises: the bottom symmetry of retrieving jar (2) is equipped with saddle (25), and the top of retrieving jar (2) is equipped with overhauls manhole (26) and level gauge interface (27).

3. The device for recycling the heavy-fraction waste liquid after the desulfurization of the MTBE product, according to claim 2, is characterized in that: retrieve the inside of jar (2) and be equipped with steam coil (28), just the lower extreme of steam coil (28) is steam inlet (29), and the upper end is steam outlet (30), retrieves jar (2) inside still to be equipped with temperature monitoring device (31).

4. The device of claim 1, wherein the device for recycling the heavy-fraction waste liquid after the desulfurization of the MTBE product comprises: the middle lifting pipe (13) is an expanding pipe, the diameters of the lifting pipe (14) and the lower lifting pipe (12) are equal, and the diameter of the middle lifting pipe (13) is 2-5 times of the diameter of the lifting pipe (14) or the lower lifting pipe (12).

5. The device of claim 4, wherein the device for recycling the heavy-fraction waste liquid after the desulfurization of the MTBE product comprises: and high-pressure spray pipes (32) are inserted into the side walls of the upper parts of the middle lifting pipe (13) and the lower lifting pipe (12), one ends of the high-pressure spray pipes (32) are connected with nozzles (33) arranged inside the middle lifting pipe (13) and the lower lifting pipe (12), and the other ends of the high-pressure spray pipes are communicated with a third pipeline (10) through a fourth pipeline (34).

6. The device of claim 5, wherein the device for recycling the heavy-fraction waste liquid after the desulfurization of the MTBE product comprises: the lower lifting pipe (12) is further connected with a recovery pipe (35), the recovery pipe (35) is located between the oil inlet (17) and the high-pressure spray pipe (32) on the lower lifting pipe (12), the recovery pipe (35) is externally connected with a filter tower (36), and the lower end of the filter tower (36) is communicated with the third pipeline (10) through a fifth pipeline (37).

7. The device of claim 6, wherein the device for recycling the heavy-fraction waste liquid after the desulfurization of the MTBE product comprises: the distance between the joint of the fourth pipeline (34) and the third pipeline (10) and the hydrogenation reactor (11) is larger than the distance between the joint of the fifth pipeline (37) and the third pipeline (10) and the hydrogenation reactor (11).

8. The device of claim 7, wherein the device for recycling the heavy-fraction waste liquid after the desulfurization of the MTBE product comprises: the lower lifting pipe (12) is also provided with a check valve (38), and the check valve (38) is positioned below the joint of the recovery pipe (35) and the lower lifting pipe (12) and above the oil inlet (17).

9. The device of claim 1, wherein the device for recycling the heavy-fraction waste liquid after the desulfurization of the MTBE product comprises: and the collecting chamber (39) is externally connected with an oil-gas separation system.

10. The device for recycling the heavy-fraction waste liquid after the desulfurization of the MTBE product, according to claim 3, is characterized in that: the recycling tank (2) is provided with a pressure gauge port (40), and the pressure gauge port (40) is connected with a pressure monitoring device (41).

Technical Field

The invention relates to a recycling device, in particular to a recycling device for heavy fraction waste liquid after desulfurization of an MTBE product, and belongs to the technical field of petrochemical industry.

Background

Methyl tert-butyl ether (MTBE) is an ideal blending component for producing lead-free, high-octane and oxygen-containing gasoline, has good intermiscibility with gasoline, can improve the combustion efficiency and the anti-explosion performance of the gasoline, and can reduce the emission of CO and other harmful substances (such as ozone, benzene, butadiene and the like). MTBE can also be used as a solvent for paraffin, oil products, spices, alkaloids, resins and rubber, a reactant for organic synthesis, and can also be cracked to prepare high-purity isobutene.

With the rapid development of the automobile industry, the pollution of automobile exhaust is increasingly concerned by people, and more strict requirements are put forward on the composition of automobile fuel in various countries in the world to protect the environment so as to reduce the emission of harmful substances, wherein the limit on the sulfur content of automobile gasoline is more strict. In recent years, the standard of motor gasoline in China is becoming stricter, for example, the requirement of sulfur content of gasoline in the fifth nation is less than 10ppm, when the MTBE product is produced and desulfurized in the prior art, in order to ensure the qualification of the MTBE product, a desulfurizer is often added, part of high-sulfur heavy fraction waste liquid is generated, the difficulty of oil-containing sewage treatment is increased, the heavy fraction waste liquid is accumulated at the bottom of a desulfurizing tower, and as the temperature of the bottom of the desulfurizing tower is kept at about 70-80 ℃, if the heavy fraction waste liquid is not discharged in time, the waste liquid generates steam to pollute finished products at high temperature, and further the sulfur content of the finished MTBE product is abnormally high.

Disclosure of Invention

The invention mainly aims at the problems in the prior art and provides a device for recycling heavy fraction waste liquid after the MTBE product is desulfurized.

The purpose of the invention is mainly realized by the following scheme:

a heavy fraction waste liquid recycling device after MTBE product desulfurization comprises a desulfurization tower, a recovery tank and a reaction device, wherein a heavy fraction waste liquid outlet is formed in the bottom of the desulfurization tower, the heavy fraction waste liquid outlet is communicated with a feed inlet in the recovery tank through a first pipeline, an air outlet is formed in the top of the recovery tank, the air outlet is communicated with an air inlet in the middle of the desulfurization tower through a second pipeline, a discharge outlet is further formed in the bottom of the recovery tank, and the discharge outlet is connected with a hydrogenation reactor through a third pipeline; the reaction device comprises a heavy oil riser reactor, a gas-solid separation system and a cyclic regeneration system, wherein the heavy oil riser reactor consists of a lower riser, a middle riser and an upper riser which are sequentially communicated from bottom to top, the bottom of the lower riser is provided with a lifting steam inlet, the middle part of the lower riser is provided with a catalyst inlet and an oil inlet positioned above the catalyst inlet, and the oil inlet is connected with an outlet of the hydrogenation reactor; the gas-solid separation system comprises a cyclone separator, a settler and a stripping device, wherein a port of the riser is communicated with the interior of the settler, the cyclone separator and the settler are both positioned above the stripping device, the upper end of the cyclone separator is connected with a collection chamber, and the lower end of the cyclone separator is connected with the stripping device; the circulating regeneration system comprises a to-be-regenerated inclined pipe, a regenerator and a regeneration inclined pipe, wherein the lower end of the stripping device is provided with a catalyst outlet, the regenerator is communicated with the catalyst outlet through the to-be-regenerated inclined pipe, one end of the regeneration inclined pipe is communicated with the lower end of the regenerator, and the other end of the regeneration inclined pipe is communicated with a catalyst inlet.

By adopting the technical scheme, the heavy fraction waste liquid can be discharged out of the desulfurizing tower in time, so that the sulfur content of the MTBE product is prevented from exceeding the standard; the MTBE evaporated by the recovery tank enters the air inlet at the middle section of the desulfurizing tower through the air outlet, and is desulfurized again in the desulfurizing tower, so that resources are saved, and the waste of MTBE products is avoided; the heavy oil riser reactor is arranged, and the waste liquid is subjected to catalytic cracking reaction, so that the treatment load of a waste oil pool is reduced, and combustible oil gas with favorable value can be generated through reaction, so that the energy is saved, and the environment is protected.

Preferably, saddles are symmetrically arranged at the bottom of the recovery tank, and an inspection manhole and a liquid level meter connector are arranged at the top of the recovery tank.

Through adopting above-mentioned technical scheme, the saddle has guaranteed the stability of retrieving the jar, overhauls the inspection that the manhole makes things convenient for maintenance personal, and the level gauge interface is used for placing the level gauge, observes the liquid level condition of retrieving jar interior liquid.

Preferably, the inside of retrieving the jar is equipped with steam coil, just steam coil's lower extreme is steam inlet, and the upper end is steam outlet, retrieves jar inside still to be equipped with temperature monitoring device.

Through adopting above-mentioned technical scheme, steam coil is used for heating the waste liquid, and the MTBE evaporation gets into the desulfurizing tower, has avoided the waste of MTBE product.

Preferably, the middle riser is an expanded diameter pipe, the diameters of the upper riser and the lower riser are equal, and the diameter of the middle riser is 2-5 times of the diameter of the upper riser or the lower riser.

By adopting the technical scheme, the expanding tube prolongs the retention time of the oil agent, and fully mixes and contacts the oil agent, so that the secondary reaction of the waste liquid (namely the modified cracking with long contact time) is fully completed.

Preferably, the side walls of the upper parts of the middle lifting pipe and the lower lifting pipe are respectively inserted with a high-pressure spray pipe, one end of each high-pressure spray pipe is connected with a nozzle arranged in the middle lifting pipe and the lower lifting pipe, and the other end of each high-pressure spray pipe is communicated with a third pipeline through a fourth pipeline.

By adopting the technical scheme, the heavy-fraction waste liquid raw material is adopted to clean the heavy oil riser reactor, so that other impurities are prevented from entering.

Preferably, the lower lifting pipe is further connected with a recovery pipe, the recovery pipe is located between the oil inlet and the high-pressure spray pipe on the lower lifting pipe, the recovery pipe is externally connected with a filter tower, and the lower end of the filter tower is communicated with a third pipeline through a fifth pipeline.

By adopting the technical scheme, the molecular sieve is arranged in the filter tower and used for filtering the coke blocks and ensuring that the recovered liquid is free of impurities.

Preferably, the distance between the joint of the fourth pipeline and the third pipeline and the hydrogenation reactor is greater than the distance between the joint of the fifth pipeline and the third pipeline and the hydrogenation reactor.

Preferably, the lower lifting pipe is further provided with a check valve, and the check valve is located below the connection position of the recovery pipe and the lower lifting pipe and above the oil inlet.

By adopting the technical scheme, the cleaning liquid is prevented from flowing to the lower part of the lower lifting pipe.

Preferably, the collecting chamber is externally connected with an oil-gas separation system.

Preferably, a pressure gauge port is arranged on the recovery tank and connected with a pressure monitoring device.

Through adopting above-mentioned technical scheme, pressure monitoring devices is used for detecting and retrieves jar internal pressure, guarantees the normal operating of device.

Therefore, the invention has the following advantages: (1) the invention has simple structure and convenient use, and the heavy fraction waste liquid is distilled again and reflows the MTBE by utilizing the recovery tank, thereby improving the utilization rate of the MTBE; (2) the invention adopts the hydro-catalytic cracking, all the high-sulfur waste liquid passes through the residual liquid recovery flow of the catalytic workshop and is reacted by the heavy oil lift pipe, thereby not only reducing the treatment load of the waste oil pool, but also generating combustible oil gas with favorable value through the reaction, and being energy-saving and environment-friendly.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the construction of the recovery tank of the present invention;

FIG. 3 is a schematic view of the structure of a reaction apparatus of the present invention.

Illustration of the drawings: 1-a desulfurizing tower, 2-a recovery tank, 3-a heavy fraction waste liquid outlet, 4-a first pipeline, 5-a feed inlet, 6-a gas outlet, 7-a second pipeline, 8-a gas inlet, 9-a discharge outlet, 10-a third pipeline, 11-a hydrogenation reactor, 12-a lower lifting pipe, 13-a middle lifting pipe, 14-an upper lifting pipe, 15-a lifting steam inlet, 16-a catalyst inlet, 17-a oil inlet, 18-a cyclone separator, 19-a settler, 20-a stripping device, 21-a to-be-regenerated inclined pipe, 22-a regenerator, 23-a regenerated inclined pipe, 24-a catalyst outlet, 25-a saddle, 26-an inspection manhole, 27-a liquid level meter interface, 28-a steam coil pipe and 29-a steam inlet, 30-a steam outlet, 31-a temperature monitoring device, 32-a high-pressure spray pipe, 33-a nozzle, 34-a fourth pipeline, 35-a recovery pipe, 36-a filter tower, 37-a fifth pipeline, 38-a check valve, 39-a collection chamber, 40-a pressure gauge port and 41-a pressure monitoring device.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

As shown in fig. 1 and 2, the invention provides a technical scheme, which is a heavy fraction waste liquid recycling device after the desulfurization of an MTBE product, and comprises a desulfurization tower 1, a recovery tank 2 and a reaction device, wherein a heavy fraction waste liquid outlet 3 is arranged at the bottom of the desulfurization tower, the heavy fraction waste liquid outlet 3 is communicated with a feed inlet 5 on the recovery tank 2 through a first pipeline 4, an air outlet 6 is arranged at the top of the recovery tank 2, the air outlet 6 is communicated with an air inlet 8 in the middle of the desulfurization tower 1 through a second pipeline 7, a discharge outlet 9 is also arranged at the bottom of the recovery tank 2, the discharge outlet 9 is connected with a hydrogenation reactor 11 through a third pipeline 10, saddles 25 are symmetrically arranged at the bottom of the recovery tank 2, an inspection manhole 26 and a liquid level meter connector 27 are arranged at the top of the recovery tank 2, a steam coil 28 is arranged inside the recovery tank 2, the lower end of the steam coil 28, the inside temperature monitoring device 31 that still is equipped with of recovery tank 2 is equipped with manometer mouth 40 on the recovery tank 2, manometer mouth 40 is connected with pressure monitoring device 41.

As shown in fig. 3, the reaction apparatus includes a heavy oil riser reactor, a gas-solid separation system and a cyclic regeneration system, the heavy oil riser reactor is composed of a lower riser 12, a middle riser 13 and an upper riser 14 which are sequentially communicated from bottom to top, the middle riser 13 is an expanded diameter pipe, the diameters of the upper riser 14 and the lower riser 12 are equal, the diameter of the middle riser 13 is 3 times of the diameter of the upper riser 14 or the lower riser 12, the bottom of the lower riser 12 is provided with a lifting steam inlet 15, the middle of the lower riser 12 is provided with a catalyst inlet 16 and an oil inlet 17 located above the catalyst inlet 16, and the oil inlet 17 is connected with the outlet of the hydrogenation reactor 11; the gas-solid separation system comprises a cyclone separator 18, a settler 19 and a stripping device 20, a port of the riser 14 is communicated with the interior of the settler 19, the cyclone separator 18 and the settler 19 are both positioned above the stripping device 20, the upper end of the cyclone separator 18 is connected with a collection chamber 39, the collection chamber 39 is externally connected with an oil-gas separation system, and the lower end of the collection chamber is connected with the stripping device 20; the recycling regeneration system comprises a to-be-regenerated inclined pipe 21, a regenerator 22 and a regeneration inclined pipe 23, wherein the lower end of the stripping device 20 is provided with a catalyst outlet 24, the regenerator 22 is communicated with the catalyst outlet 24 through the to-be-regenerated inclined pipe 21, one end of the regeneration inclined pipe 23 is communicated with the lower end of the regenerator 22, and the other end of the regeneration inclined pipe is communicated with the catalyst inlet 16; the upper side walls of the middle riser 13 and the lower riser 12 are inserted with high-pressure nozzles 32, one end of each high-pressure nozzle 32 is connected with a nozzle 33 arranged inside the middle riser 13 and the lower riser 12, the other end of each high-pressure nozzle is communicated with the third pipeline 10 through a fourth pipeline 34, the lower riser 12 is also provided with a stop valve 38, the stop valve 38 is positioned below the connection part of the recovery pipe 35 and the lower riser 12, and is positioned above the oil inlet 17, the lower lifting pipe 12 is also connected with a recovery pipe 35, the recovery pipe 35 is positioned between the oil inlet 17 and the high-pressure spray pipe 32 on the lower lifting pipe 12, the recycling pipe 35 is externally connected with a filter tower 36, the lower end of the filter tower 36 is communicated with the third pipeline 10 through a fifth pipeline 37, and the distance between the joint of the fourth pipeline 34 and the third pipeline 10 and the hydrogenation reactor 11 is greater than the distance between the joint of the fifth pipeline 37 and the third pipeline 10 and the hydrogenation reactor 11.

The heavy fraction waste liquid generated in the production process of the desulfurizing tower 1 is collected into a recovery tank 2, the heavy fraction waste liquid is distilled again by the recovery tank and reflows to MTBE, the utilization rate of the MTBE is improved, the heated heavy fraction waste liquid flows out from a discharge hole 9, then flows into a heavy oil riser reactor after reacting in a hydrogenation reactor 11, lifting steam enters a lower riser 12 through a lifting steam inlet 15, and a hot regenerated catalyst enters the lower riser 12 through a regeneration inclined tube 23 and is lifted by the lifting steam; the hydrogenated waste liquid enters the lower riser 12 through the oil inlet 17 to be mixed with a hot catalyst to generate a high-temperature thermal shock cracking reaction under certain conditions, and enters the middle riser 13 from the lower riser 12, namely the diameter-expanded riser, so that the residence time of the oil agent is prolonged due to the diameter expansion of the diameter-expanded riser, the oil agent is fully mixed and contacted, and a secondary reaction (namely the modified cracking with long contact time) is fully completed; the oil gas and the catalyst lifted from the middle lifting pipe 13 enter the lifting pipe 14, then the reactant flow rapidly enters the settler 19 and the cyclone separator 18, the reaction product enters the separation system through the oil-gas separation system pipeline, the spent catalyst with carbon after the reaction enters the stripper, enters the regenerator 22 through the spent inclined pipe 21 after being stripped by the water vapor from the steam pipeline, and the hot catalyst after being burned and regenerated by air returns to the lower lifting pipe 12 through the regenerated inclined pipe 23 for recycling; during cleaning, the stop valve 38 is closed, heavy fraction waste liquid is sprayed into the middle lifting pipe 13 and the lower lifting pipe 12 through the high-pressure spray pipe 32, then flows into the recovery pipe 35, is filtered in the filter tower 36, and flows back to the third pipeline 10, so that recycling is realized. According to the invention, all high-sulfur heavy-fraction waste liquid passes through a residual liquid recovery flow of a catalytic workshop and is subjected to a heavy oil riser reaction, so that the treatment load of a waste oil pool is reduced, and combustible oil gas with favorable value can be generated through the reaction, so that the energy is saved, and the environment is protected.

It should be understood that this example is only for illustrating the present invention and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.