Method and apparatus for treating feed before quench tower

Abstract

This invention relates to a method and process apparatus for treating a feed before a quench tower in an integrated process, wherein the integrated process includes at least one gasifier (1) for forming a gasifier stream (3), at least one pyrolysis furnace (2) for forming a pyrolysis stream (4), at least one quench tower (6) for treating a feed (5) comprising the gasifier stream and the pyrolysis streams (3, 4), and at least one feed line for supplying the feed to the quench tower. The gasifier stream (3) is at least partially cooled to stop the chemical reaction after gasification, the pyrolysis stream (4) is at least partially cooled after the pyrolysis furnace (2), the gasifier stream (3) and the pyrolysis stream (4) are combined before a feed line valve (11) of the feed line to form the feed (5) to the quench tower (6), and the temperature of the feed is controlled to a predetermined temperature of the feed line before the quench tower (6). Furthermore, this invention relates to the use of this method.

Description

Technical Field

[0001] This application relates to a method and process equipment for treating feed before a quench tower in an integrated process. Background Technology

[0002] Olefins are known from existing technologies to be produced from fossil feedstocks through cracking processes, such as steam cracking.

[0003] Furthermore, it is known from existing technologies that waste plastics are difficult to recycle and use as raw materials for new products. Mechanical recycling is the cheapest way to recycle waste plastics. Mechanically recycled plastics are typically used in lower-level applications.

[0004] Purpose

[0005] The objective is to address the aforementioned problems. Furthermore, the objective is to disclose a novel method and process equipment for treating feed before the quench tower in a cracking process. Additionally, the objective is to recover olefins from polyolefins and recycle plastics. Furthermore, the objective is to improve the integrated process including the cracking unit and the gasifier unit. Summary of the Invention

[0006] In the method and process equipment, the feed is treated before the quench tower in an integrated process, which includes at least a gasifier for forming a gasifier stream, a pyrolysis furnace for forming a pyrolysis stream, and a quench tower for treating the feed including the gasifier stream and the pyrolysis stream, and the gasifier stream and the pyrolysis stream are combined to form the feed, and the temperature of the feed is controlled to a predetermined temperature before the quench tower. Attached Figure Description

[0007] The accompanying drawings, which are included in and form part of this specification to provide a further understanding of the invention, illustrate some embodiments of the invention and, together with this specification, help to explain the principles of the invention. In the drawings:

[0008] Figure 1 This is a flowchart illustrating a process according to one embodiment.

[0009] Figure 2 This is a flowchart illustrating a process according to another embodiment.

[0010] Figure 3 This is a flowchart illustrating a process according to another embodiment, and

[0011] Figure 4 This is a flowchart illustrating a process according to another embodiment. Detailed Implementation

[0012] In this method, the feed is treated before the quench tower in an integrated process. The integrated process includes at least one gasifier for forming a gasifier stream by gasification, at least one pyrolysis furnace (e.g., a steam pyrolysis furnace) for forming a pyrolysis stream, at least one quench tower for processing the feed comprising the gasifier stream and the pyrolysis stream, and at least one feed line for supplying the feed to the quench tower. The method includes at least partially cooling the gasifier stream to stop the chemical reaction after gasification, at least partially cooling the pyrolysis stream after the pyrolysis furnace, merging the gasifier stream and the pyrolysis stream before a feed line valve in the feed line to form the feed to the quench tower, and controlling the temperature of the feed to a predetermined temperature in the feed line before the quench tower. The feed line includes at least one feed line valve 11, and the gasifier stream 3 and the pyrolysis stream 4 are merged before the feed line valve in the feed line.

[0013] In this context, a feed line means any feed line between any cracking furnace and any quench tower. A feed line may include at least one or more feed lines for the cracking furnace and a main feed line. The cracker flow from the feed line of the cracking furnace is collected into the main feed line, and the resulting feed is supplied to the quench tower via the main feed line. At least one of the feed lines includes at least one feed line valve. In one embodiment, the feed line valve is located before the main feed line or between the cracking furnace's feed line and the main feed line. The feed line valve is a valve used to isolate the cracking furnace from the main feed line. In one embodiment, the feed line valve is used to isolate the cracking furnace from a common feed line used for decoking of the furnace tubes and the feed line heat exchanger. When the gasifier flow is combined with the cracker flow before the feed line valve, the gasifier can be easily integrated into the cracker unit without problems throughout the cracking process. In one embodiment, the feed line valve can be operated by opening and closing the valve. In one embodiment, the line between the gasifier and the feed line includes a valve that can be opened and closed. Then, the line from the vaporizer can be opened by opening the valve and the vaporizer flow can be combined with the pyrolyzer flow, or alternatively, the valve can be closed and the vaporizer flow can not be combined with the pyrolyzer flow.

[0014] The process equipment (i.e., apparatus) for treating the feed before the quench tower in relation to the integrated process includes at least one means for at least partially cooling the gasifier stream to stop the chemical reaction after gasification, a cooling system for controlling the temperature of the feed to a predetermined temperature in the delivery line before the quench tower, and at least one connection point in the delivery line where the gasifier stream and the pyrolysis stream are combined to form the feed to the quench tower. The cooling system includes at least one cooling means for at least partially cooling the pyrolysis stream after the pyrolysis furnace. The delivery line includes at least one delivery line valve 11, and the connection point is located before the delivery line valve. In one embodiment, the connection point is located before the delivery line valve in the delivery line from the pyrolysis furnace to the main delivery line. The integrated process includes at least one gasifier for forming the gasifier stream, at least one pyrolysis furnace for forming the pyrolysis stream, at least one quench tower for treating the feed comprising the gasifier stream and the pyrolysis stream, and at least one delivery line for supplying the feed to the quench tower.

[0015] Some embodiments of the methods and process equipment are in Figure 1-4 As shown in the image.

[0016] In an integrated process, at least one gasifier unit, including one or more gasifiers, is interconnected with a cracker unit (e.g., an olefin cracker unit). The cracker unit may be a steam cracker unit. The cracker unit includes at least one cracking furnace, at least one quench tower, and at least one feed line for supplying feed to the quench tower. In this context, a quench tower means any quench tower, such as a quench tower in a main quench unit or fractionation unit, a first quench tower in a main quench unit or fractionation unit, a main quench tower, a main quench tower of a fractionation unit, or a first-stage fractionation unit. Furthermore, the cracker unit includes at least one cooling device for cooling the cracked gas before the quench tower. Ideally, the gasifier unit is connected to a main feed line located between the cracking furnace and the quench tower of the cracker unit. If such a connection is not available, the gasifier unit can be integrated within the boundary of the cracking furnace. Downstream facilities of the cracker can then separate the valuable components formed in the gasifier and thus reduce the consumption of fresh feed to the cracker at any given olefin production level. Typically, the process conditions at the vaporizer outlet must meet the requirements of the pyrolysis unit. In one embodiment, the pressure is typically low, at 1-3 bar (gauge pressure), and the temperature is approximately 200°C-250°C. Because the flow rate from the vaporizer is very low compared to the flow rate in the pyrolysis feed line, cooling can be achieved through internal mixing within the feed line, thus eliminating the need for additional quenching within the vaporizer unit to stop the chemical reaction after vaporization. When connections are made within the pyrolysis furnace boundary, the temperature can be controlled to meet the required pyrolysis conditions using secondary cooling devices of the pyrolysis unit (e.g., secondary quench exchangers) and by directly injecting the desired quench.

[0017] In this context, gasification in gasifier 1 refers to any gasification process carried out by steam. Gasification is the process of converting starting material into gasification products, and in this context, into a gasifier stream. This is achieved by treating the starting material with a controlled amount of steam at a suitable temperature. In one embodiment, gasification is carried out at 680°C–750°C. Any suitable gasifier can be used in this method. In one embodiment, the gasifier is a vertical fluidized bed gasifier. In one embodiment, the fluidized bed is an inert bed within the gasifier.

[0018] The starting material in the gasification can be any suitable material. The gasifier stream can be formed in the gasifier from plastic waste containing polyolefins and / or recycled plastics. In one embodiment, the plastic waste is recycled plastic. In this context, recycled plastic means any mixture of plastics consisting of one or more polymers. Recycled plastic may contain polyolefins, such as polyethylene or polypropylene, and other polymers, as well as other components such as paper, cardboard, and / or aluminum materials. In one embodiment, recycled plastic may also include PVC plastic.

[0019] In this context, vaporizer stream 3 means any stream formed in the vaporizer, such as gas, product, etc. In one embodiment, the vaporizer stream is a gas. The vaporizer stream contains olefins, such as ethylene and propylene, and the vaporizer stream can be rich in olefins. In addition, the vaporizer stream may contain aromatic compounds, such as benzene and toluene, as well as other hydrocarbons, such as butadiene. Typically, the vaporizer stream is a mixture of hydrocarbons.

[0020] In cracking furnace 2, a cracker stream is formed. The reaction can be carried out in the furnace, for example, at 750°C-900°C, wherein the reaction time is short, for example, less than 1 second. For example, in the gasifier, the residence time can be less than 10 seconds, 1-10 seconds in one embodiment and 3-10 seconds in another embodiment.

[0021] In this context, pyrolyzer stream 4 means any stream formed in pyrolysis furnace 2, such as gas, products, etc. In one embodiment, the pyrolyzer stream is a gas. The pyrolyzer stream contains olefins, and is typically rich in olefins. In addition, the pyrolyzer stream may contain other hydrocarbons and / or components.

[0022] In one embodiment, the gasifier stream 3 is fed into the delivery line 10 and merged with the pyrolysis stream 4 to form the feed 5 to the quench tower 6. In another embodiment, the gasifier stream and the pyrolysis stream are merged in the delivery line. In yet another embodiment, the delivery line is located between the pyrolysis furnace and the quench tower. The delivery line is arranged to deliver the pyrolysis stream 4 and the feed 5 to the quench tower.

[0023] The gasifier stream from the gasifier can be connected to the pyrolysis stream at various process locations. For example, within the operating pyrolysis furnace site or directly to a delivery line connected to the quench tower. Because the gasifier stream has a lower flow rate compared to the pyrolysis stream, cooling can be achieved through online mixing, thus eliminating the need for any additional cooling equipment for the gasifier stream.

[0024] In one embodiment, the process apparatus includes one or more connection points. In another embodiment, the process apparatus includes more than one connection point, and the desired connection point is used to merge the gasifier flow and the pyrolysis flow. In this context, the connection point can be any connection point, feed point, connection, coupling, combination, etc., through which the gasifier unit can be connected to the pyrolysis unit. In one embodiment, the connection point is located at a position connected to a delivery line for merging the gasifier flow 3 and the pyrolysis flow 4 in the delivery line before the delivery line valve 11 in the delivery line. In one embodiment, the connection point is connected to the delivery line. In one embodiment, the connection point is after the cooling devices 8a, 8b of the pyrolysis flow, such as after the primary cooling device or after the primary and secondary cooling devices.

[0025] In one embodiment, the vaporizer stream 3 and the pyrolyzer stream 4 are combined to form feed 5, and feed 5 is cooled after the combination. In another embodiment, the vaporizer stream 3 and the pyrolyzer stream 4 are combined to form feed 5, and feed 5 is not cooled after the combination. In yet another embodiment, the vaporizer stream 3 and the pyrolyzer stream 4 are combined after a first cooling device, such as a primary cooling device. In yet another embodiment, the formed feed is cooled after a first cooling device.

[0026] In one embodiment, the cooling system is arranged to meet the design temperature of the feed line connected to the quench tower 6. In one embodiment, the feed temperature before the quench tower is set to be below 250°C. In one embodiment, the feed temperature before the quench tower is below 220°C. In one embodiment, the feed temperature before the quench tower is 200°C-250°C, and in one embodiment, 200°C-220°C.

[0027] In one embodiment, the reaction is rapidly stopped after vaporization by cooling the vaporizer stream 3 to a temperature below 600°C, or below 550°C in one embodiment, to halt the chemical reaction. The yield of the target product (e.g., light olefins) can then be increased or maximized.

[0028] In one embodiment, the reaction is stopped after the pyrolysis furnace by cooling the pyrolysis stream 4 to a temperature below 600°C, 500°C-600°C in one embodiment, and 550°C-600°C in another embodiment to stop the chemical reaction. In one embodiment, the pyrolysis stream 4 is cooled to a temperature of 400°C-550°C, 400°C-500°C in one embodiment, before merging. In one embodiment, the pyrolysis stream 4 is cooled to a temperature below 250°C in several steps before merging. In one embodiment, the pyrolysis stream 4 is cooled to a temperature of 200°C-250°C, 200°C-220°C in another embodiment, before merging.

[0029] In one embodiment, the cooling system includes at least one cooling device 8a, 8b for cooling the pyrolysis stream 4 and / or the feed 5. In one embodiment, the cooling system includes at least two cooling devices for cooling the pyrolysis stream 4 and / or the feed 5, such as primary and secondary cooling devices. In one embodiment, the cooling system includes at least two cooling devices for cooling the pyrolysis stream 4 to a desired temperature after the pyrolysis furnace 2 and before merging, such as primary and secondary cooling devices. In one embodiment, the cooling system includes at least one cooling device (e.g., a primary cooling device) for cooling the pyrolysis stream 4 and at least one cooling device (e.g., a secondary cooling device) for cooling the feed 5 after merging. In one embodiment, at least one cooling device is a quench exchanger. In one embodiment, the primary cooling device is a primary quench exchanger and the secondary cooling device is a secondary quench exchanger.

[0030] In one embodiment, the vaporizer stream 3 is cooled prior to merging. In one embodiment, the process equipment includes at least one cooling device 7, such as a water quench or heat exchanger, in the vaporizer unit prior to merging for cooling the vaporizer stream to a desired temperature after vaporizer 1. In one embodiment, the cooling device for the vaporizer unit is a water quench. In one embodiment, the cooling device for the vaporizer unit is a heat exchanger.

[0031] In one embodiment, the gasifier stream 3 is fed into the pyrolysis stream at a temperature of 400°C-550°C, or 400°C-500°C in another embodiment. In one embodiment, the gasifier stream 3 is cooled to a temperature of 400°C-600°C, or 450°C-550°C in another embodiment, before merging. In one embodiment, the gasifier stream 3 is cooled to a temperature of 200°C-250°C before merging.

[0032] In one embodiment, the feed 5 is cooled after merging.

[0033] In one embodiment, the vaporizer flow 3 and the pyrolyzer flow 4 are combined in the delivery line, and cooling of the vaporizer flow can be achieved through internal mixing within the delivery line. When the vaporizer flow and the pyrolyzer flow are combined, the vaporizer flow can be cooled by the pyrolyzer flow because the pyrolyzer flow is significantly larger than the vaporizer flow.

[0034] In one embodiment, the process equipment includes at least one cooling device 7 for at least partially cooling the gasifier stream 3 after the gasifier 1 and at least one cooling device 8a, 8b for at least partially cooling the pyrolyzer stream 4 after the steam pyrolyzer 2.

[0035] In one embodiment, feed 5 or pyrolysis stream 4 is cooled by direct quench 12 via the injection of water and / or oil. In one embodiment, the direct injection of quench is arranged to control the temperature in the feed or pyrolysis stream. In one embodiment, the existing quench rate may be increased to compensate for additional heat from the gasifier. In one embodiment, the process apparatus includes at least one direct quench by which feed 5 or pyrolysis stream 4 is cooled by the injection of water and / or oil. Any suitable direct quench can be used. When gasifier 1 is connected to the pyrolysis furnace 2, the furnace direct quench system will also be able to cool the gasifier stream if the control temperature is measured downstream of the gasifier connection point. In one embodiment, water and / or oil may be recycled to the direct quench, for example from a quench tower or another quench unit. In one embodiment, the pyrolysis stream and / or feed is cooled by direct quench after the pyrolysis stream and / or feed has been cooled. In one embodiment, the injection of direct quench is arranged after the cooling device for the pyrolysis stream and / or feed.

[0036] In one embodiment, another pyrolysis furnace 13 may be connected to the delivery line 10. In one embodiment, at least one additional pyrolysis furnace (in which the pyrolysis stream is at least partially cooled) may be connected to the delivery line after the cooling devices 8a, 8b.

[0037] When the vaporizer stream is combined with the pyrolysis stream, potential contaminants in the vaporizer stream can be diluted because the pyrolysis stream is significantly larger than the vaporizer stream. The mass flow rate of the pyrolysis stream can typically be 20+ times that of the vaporizer stream. Therefore, contaminant removal is not mandatory. In one embodiment, the vaporizer stream is filtered after vaporization. In another embodiment, the vaporizer stream is subjected to dry scrubbing and then filtered. In one embodiment, the temperature of the vaporizer stream after filtration is 400°C–430°C.

[0038] After the quench tower, gas 9 can be compressed for use in the fractionation unit or processed in any other way.

[0039] The methods and equipment are based on continuous processes.

[0040] In one embodiment, the method and process equipment can be used to produce olefins, aromatic compounds (e.g., benzene, toluene or other aromatic compounds), other hydrocarbons, polymers, polyolefins, etc., for producing products from recycled plastic waste, for recycling polyolefins back to light olefins, or combinations thereof.

[0041] This invention improves the integration of the vaporizer unit with existing pyrolysis units and allows for easy integration without shutting down the entire pyrolysis process. For example, no additional pre-quench is required to cool the vaporizer stream. Furthermore, this process allows for the removal of some impurities from the resulting vaporizer stream.

[0042] The methods and process equipment provide the possibility of easily, energy-efficiently, and cost-effectively producing olefins and polyolefins. This invention provides an industrially applicable, simple, and economical way to produce desired products from various starting materials. The methods and process equipment associated with the production process are easy and simple to implement.

[0043] Furthermore, the recycling of plastics can be improved through this invention. Recycled materials can be easily and efficiently processed and utilized. Waste materials can be upgraded in this process.

[0044] Example

[0045] Figure 1-4 Examples of methods for treating feed before the quench tower, related to integrated processes, are shown.

[0046] The integrated process includes at least one gasifier 1 for forming a gasifier stream 3, at least one pyrolysis furnace 2 for forming a pyrolysis stream 4, at least one quench tower 6 for processing a feed 5 including the gasifier stream 3 and the pyrolysis stream 4, and at least one delivery line 10 for supplying the feed to the quench tower.

[0047] Figure 1The process equipment includes means for at least partially cooling the gasifier stream 3 to stop the chemical reaction after gasification in the gasifier 1. Furthermore, the process equipment includes a cooling system for controlling the temperature of the feed 5 to a predetermined temperature of the delivery pipeline before the quench tower 6. Additionally, the process equipment includes at least one connection point at which the gasifier stream 3 and the pyrolyzer stream 4 are combined to form the feed 5 to the quench tower. The cooling system includes at least one cooling device 8, 8a, 8b for at least partially cooling the pyrolyzer stream 4 after the pyrolysis furnace 2. The connection point is located between the cooling device and the quench tower, in which the pyrolyzer stream is at least partially cooled after the pyrolysis furnace. In one embodiment, the gasifier stream 3 may be cooled by a cooling device 7 after the gasifier 1 and before being combined with the pyrolyzer stream 4. In one embodiment, the pyrolyzer stream 4 may be cooled by at least two cooling devices 8 after the pyrolysis furnace 2 and before being combined. In one embodiment, the pyrolysis stream 4 can be cooled by a primary cooling device 8a after the pyrolysis furnace 2, and then the gasifier stream 3 is combined with the pyrolysis stream 4 to form feed 5, which is then cooled by a secondary cooling device 8b. The temperature of feed 5 is set below 250°C before the quench tower 6.

[0048] Figure 2The process equipment includes means for at least partially cooling the gasifier stream 3 to stop the chemical reaction after gasification in the gasifier 1. The reaction is rapidly stopped by cooling the gasifier stream 3 to a temperature below 600°C to stop the chemical reaction. Furthermore, the pyrolysis reaction is stopped after the pyrolysis furnace 2 by cooling the pyrolysis stream 4 to a temperature below 600°C to stop the chemical reaction. The process equipment also includes a cooling system for controlling the temperature of the feed 5 to a predetermined temperature in the delivery line before the quench tower 6. Additionally, the process equipment includes at least one connection point where the gasifier stream 3 and the pyrolysis stream 4 are combined to form the feed 5 to the quench tower. The cooling system includes at least two cooling devices 8a, 8b, such as primary and secondary quench exchangers, for cooling the pyrolysis stream 4 to a temperature of 200°C-250°C after the pyrolysis furnace 2. The connection point is located after the cooling devices 8a, 8b, in which the pyrolysis stream is cooled. The gasifier stream 3 and the pyrolysis stream 4 are combined in the delivery line 10. The delivery line includes a delivery line valve 11, which merges the vaporizer stream 3 with the pyrolysis stream 4 before the delivery line valve 11. After the vaporizer 1 and before merging with the pyrolysis stream 4, the vaporizer stream 3 can be quenched to a temperature of 200°C-250°C by at least one cooling device 7, such as a heat exchanger and / or water. Alternatively, the vaporizer stream 3 is merged with the pyrolysis stream 4 in the delivery line, and at least a portion of the cooling of the vaporizer stream can be achieved by internal mixing within the delivery line. The vaporizer stream 3 can then be fed into the pyrolysis stream at a temperature of 400°C-500°C or at a temperature below 400°C, for example, below 250°C. Furthermore, the process equipment may include at least one direct quench 12, by which the pyrolysis stream 4 or the feed 5 is cooled by injecting water and / or oil. The temperature of the feed 5 is set below 250°C before the quench tower 6. The gas stream 9 is discharged from the quench tower.

[0049] Figure 3The process equipment includes means for at least partially cooling the gasifier stream 3 to stop the chemical reaction after gasification in the gasifier 1. The reaction is rapidly stopped by cooling the gasifier stream 3 to a temperature below 600°C to stop the chemical reaction. Furthermore, the pyrolysis reaction is stopped after the pyrolysis furnace 2 by cooling the pyrolysis stream 4 to a temperature below 600°C to stop the chemical reaction. The process equipment also includes a cooling system for controlling the temperature of the feed 5 to a predetermined temperature of the delivery pipeline before the quench tower 6. Additionally, the process equipment includes at least one connection point where the gasifier stream 3 and the pyrolysis stream 4 are combined to form the feed 5 to the quench tower. The cooling system includes at least two cooling devices 8a and 8b. After the pyrolysis furnace 2, the pyrolysis stream 4 is cooled to a temperature of 400°C-500°C by a primary cooling device 8a, such as a primary quench exchanger. The gasifier stream 3 is then combined with the pyrolysis stream 4 to form the feed 5. The gasifier stream 3 is fed into the pyrolysis stream at a temperature of 400°C-500°C. In one embodiment, the vaporizer stream 3 may be cooled by a cooling device after the vaporizer 1 and before merging with the pyrolyzer stream 4. The resulting feed 5 is cooled by a secondary cooling device 8b (e.g., a secondary quench exchanger). The temperature of the feed 5 is set below 250°C before the quench tower 6. The gas stream 9 is discharged from the quench tower. The delivery line includes a delivery line valve 11, before which the vaporizer stream 3 is merged with the pyrolyzer stream 4.

[0050] Figure 4The process equipment includes a device 14 for at least partially cooling the gasifier stream 3 to stop the chemical reaction after gasification in the gasifier 1. The reaction is rapidly stopped by cooling the gasifier stream 3 to a temperature below 600°C to stop the chemical reaction. Furthermore, the pyrolysis reaction is stopped after the pyrolysis furnace 2 by cooling the pyrolysis stream 4 to a temperature below 600°C to stop the chemical reaction. Additionally, the process equipment includes a cooling system for controlling the temperature of the feed 5 to a predetermined temperature of the delivery line 10 before the quench tower 6. Furthermore, the process equipment includes two connection points where the gasifier stream 3 and the pyrolysis stream 4 can be combined to form the feed 5 to the quench tower. The cooling system includes at least one cooling device 8a or alternatively two cooling devices 8a, 8b, such as primary and secondary quench exchangers, for cooling the pyrolysis stream 4 and / or the feed 5 to a temperature of 200°C-250°C. Connection points B and C are located at points connected to the delivery pipelines for merging the vaporizer flow 3 and the pyrolyzer flow 4 in the main delivery pipeline, after the two cooling devices 8a and 8b and before the delivery pipeline valve 11 in delivery pipeline B, or after the primary cooling device 8a of the pyrolyzer flow and before the delivery pipeline valve 11 in delivery pipeline C. The vaporizer flow 3 and the pyrolyzer flow 4 are merged at the desired connection points B and C. After the vaporizer 1 and before merging with the pyrolyzer flow 4, the vaporizer flow 3 can be quenched to a temperature of 200°C-250°C by at least one cooling device 7, such as a heat exchanger and / or water quenching. The vaporizer flow 3 and the pyrolyzer flow 4 can be merged in the delivery pipeline, for example, upstream of the delivery pipeline valves 11 and B. In one embodiment, a portion of the cooling of the vaporizer flow can be achieved through internal mixing within the delivery pipeline. Furthermore, the gasifier stream 3 and the pyrolysis stream 4 can be merged at connection point C after the primary cooling unit 8a, such that the pyrolysis stream 4 is cooled to a temperature of 400°C-500°C by the primary cooling unit 8a after the pyrolysis furnace 2, and then the gasifier stream 3 and the pyrolysis stream 4 are merged to form feed 5. The formed feed 5 can be cooled by the secondary cooling unit 8b. The gasifier stream 3 is fed into the pyrolysis stream at a temperature of 400°C-500°C. In addition, the process equipment includes at least one direct quench 12, by which the pyrolysis stream 4 or feed 5 is cooled by injecting water and / or oil. Another pyrolysis furnace 13, in which the pyrolysis stream is at least partially cooled, can be connected to the delivery line 10 after the cooling units 8a and 8b. The temperature of feed 5 is set below 250°C before the quench tower 6. Gas stream 9 is discharged from the quench tower.

[0051] Any suitable apparatus and equipment can be used in the processes of these examples.

[0052] The methods and process equipment are suitable for various embodiments of producing olefins, polyolefins and other hydrocarbons from different starting materials.

[0053] The invention is not limited to the examples mentioned above; rather, many variations are possible within the scope of the inventive concept defined by the claims.

Claims

1. A method for treating a feed prior to a quench tower in an integrated process, wherein the integrated process includes at least one gasifier for forming a gasifier stream, at least one pyrolysis furnace for forming a pyrolysis stream, at least one quench tower for treating a feed comprising the gasifier stream and the pyrolysis stream, and at least one delivery line for supplying the feed to the quench tower, wherein the method includes The vaporizer stream is formed from recycled plastic in the vaporizer and cooled to rapidly stop the chemical reaction after vaporization. - The pyrolysis stream is cooled at least partially after the pyrolysis furnace. - A feed line valve is arranged on the feed line, and the vaporizer flow and the pyrolyzer flow are combined before the feed line valve to form the feed to the quench tower, from which gas is discharged, and - Control the temperature of the feed to the predetermined temperature of the delivery pipeline before the quench tower.

2. The method according to claim 1, wherein, The feed temperature is set below 250°C before the quench tower.

3. The method according to claim 1, wherein, The gasifier stream is combined with the pyrolyzer stream to form the feed, and the feed is cooled after the combination.

4. The method according to claim 1, wherein, Prior to the merging, the vaporizer stream is further cooled by a cooling device.

5. The method according to claim 1, wherein, The gasifier stream is supplied to the pyrolyzer stream at a temperature of 400°C-500°C to form the feed.

6. The method according to claim 1, wherein, Prior to this merging, the vaporizer stream was cooled to a temperature of 200°C-250°C.

7. The method according to claim 1, wherein, The pyrolyzer stream was cooled to 400°C-500°C before the merging.

8. The method according to claim 1, wherein, The pyrolysis stream was cooled to 200°C-250°C before the merging.

9. The method according to claim 1, wherein, The feed or the pyrolyzer flow is cooled by direct quenching with injected water and / or oil.

10. A process apparatus for treating a feed prior to a quench tower in an integrated process, wherein the integrated process includes at least one gasifier for forming a gasifier stream, at least one pyrolysis furnace for forming a pyrolysis stream, at least one quench tower for treating a feed comprising the gasifier stream and the pyrolysis stream, and at least one delivery line for supplying the feed to the quench tower, wherein the process apparatus includes - At least one device for cooling the vaporizer stream formed from recycled plastic to rapidly stop the chemical reaction after vaporization. - A cooling system for controlling the temperature of the feed to a predetermined temperature in the delivery pipeline before the quench tower, and the cooling system includes at least one cooling device for at least partially cooling the pyrolysis stream after the pyrolysis furnace, and - At least one connection point in the delivery line, at which the gasifier flow and the pyrolyzer flow are combined to form the feed to the quench tower, the gas is discharged from the quench tower, and the delivery line includes at least one delivery line valve and the connection point is located before the delivery line valve.

11. The process equipment according to claim 10, wherein, The cooling system also includes at least one cooling device for further cooling the pyrolysis stream and / or at least one cooling device for cooling the feed.

12. The process equipment according to claim 10, wherein, The process equipment also includes at least one cooling device for further cooling the gasifier stream after the gasifier.

13. The process equipment according to claim 10, wherein, The cooling system includes at least two cooling devices for cooling the pyrolysis stream prior to the merging.

14. The process equipment according to claim 10, wherein, The cooling system also includes at least one cooling device for further cooling the pyrolysis stream and at least one cooling device for cooling the feed.

15. The process equipment according to claim 10, wherein, The feed or the pyrolyzer flow is cooled by direct quenching with injected water and / or oil.

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