Waste heat utilization device of phenol ammonia recovery system

Abstract

The invention discloses a waste heat utilization device of a phenol ammonia recovery system, the waste heat utilization device comprises the phenol ammonia recovery system, the phenol ammonia recovery system comprises a preprocessor, an integrated reaction tower, a separation tank and a precision processing unit, the preprocessor is connected with the integrated reaction tower through a pipeline, the integrated reaction tower is connected with the separation tank through a pipeline, and the separation tank is connected with the precision processing unit through a pipeline. The separation tank is connected with the fine treatment unit; the waste heat recovery system is composed of a phase change energy storage system, a heat exchange network and an intelligent control system, the phase change energy storage system is connected with the integrated reaction tower, and the heat exchange network is composed of a first heat exchanger and a second heat exchanger. By arranging the waste heat recovery system, a large amount of waste heat generated in the operation process of the phenol ammonia recovery system can be effectively recovered and reused, such as preheating raw gas and providing heat for a fine treatment unit, so that the energy utilization efficiency is greatly improved, and the energy consumption and the production cost are reduced.

Description

Technical Field

[0001] The invention relates to the field of chemical industry, in particular to a waste heat utilization device of a phenol-ammonia recovery system. Background Art

[0002] Phenol and ammonia recovery is an important link in the chemical production process, especially in the coal gasification, coking and other industries. The recovery of valuable chemicals such as phenol and ammonia from waste gas has important economic and environmental significance. The phenol and ammonia recovery system usually includes multiple processing units, such as pretreatment, reaction, separation and fine treatment, to achieve efficient recovery and purification of phenol and ammonia.

[0003] The existing phenol-ammonia recovery system generates a large amount of waste heat during operation, and this waste heat is often not effectively recovered and utilized, but is directly discharged into the environment, causing energy waste and increasing the company's energy consumption and production costs. For example, the integrated reaction tower releases a large amount of heat during chemical reactions. If this heat cannot be reasonably utilized, it will lead to a large loss of energy.

[0004] The existing phenol-ammonia recovery system has limited purification effect on raw gas in the pretreatment stage and cannot effectively remove impurities and some gaseous substances, which may affect the efficiency and product quality of subsequent reactions and separation stages. For example, impurities and particulate matter contained in raw gas may cause the deactivation of reaction catalysts and reduce reaction efficiency. Summary of the invention

[0005] The object of the present invention is to provide a waste heat utilization device for a phenol-ammonia recovery system to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A waste heat utilization device of a phenol-ammonia recovery system, comprising

[0008] A phenol-ammonia recovery system, the phenol-ammonia recovery system consisting of a pretreatment unit, an integrated reaction tower, a separation tank and a fine treatment unit, the pretreatment unit being connected to the integrated reaction tower via a pipeline, the integrated reaction tower being connected to the separation tank via a pipeline, and the separation tank being connected to the fine treatment unit;

[0009] A waste heat recovery system, wherein the waste heat recovery system is composed of a phase change energy storage system, a heat exchange network and an intelligent control system. The phase change energy storage system is connected to an integrated reaction tower. The heat exchange network is composed of a heat exchanger 1 and a heat exchanger 2. One end of the heat exchanger 1 is connected to a preprocessor and the other end is connected to an integrated reaction tower. One end of the heat exchanger 2 is connected to a separation tank and the other end is connected to a fine treatment unit. The heat exchange network is connected to the phase change energy storage system;

[0010] The intelligent control system is connected to the phase change energy storage system and the first heat exchanger and the second heat exchanger respectively through signal lines.

[0011] In the present invention, a filtering device and a condensing device are arranged inside the pre-processor, the filtering device is arranged at the inlet side of the pre-processor, and the condensing device is arranged at the outlet side of the pre-processor.

[0012] In the present invention, a perforated partition is arranged in the middle of the inner side of the integrated reaction tower, and a separation layer and a reaction layer are arranged at the upper and lower ends of the perforated partition, respectively.

[0013] In the present invention, a gravity sedimentation zone and a centrifugal separation zone are respectively arranged at the upper and lower ends of the separation tank, and an inclined plate is arranged on the left side of the inner wall of the separation tank and close to the bottom of the gravity sedimentation zone, and the right side of the inclined plate extends to the inside of the centrifugal separation zone.

[0014] In the present invention, the finishing unit consists of a distillation tower and a water phase treatment unit. A reboiler is arranged below the distillation tower. The reboiler is connected to the distillation tower through a pipeline. An ion exchange resin layer and a membrane separation layer are arranged above and below the inner middle part of the water phase treatment unit.

[0015] In the present invention, an oil phase outlet and a water phase outlet are respectively provided at the upper and lower ends of the right side of the separation tank, the oil phase outlet is connected to the distillation tower, and the water phase outlet is connected to the water phase treatment unit.

[0016] In the present invention, a control port 1 is provided at one end of the phase change energy storage system, a control port 2 is provided at the same-direction end of the heat exchanger 1 and the heat exchanger 2, one end of the intelligent control system is electrically connected to the control port 1, and the other end is electrically connected to the two control ports 2 respectively.

[0017] In the present invention, the inlet end of the pre-processor is connected to the raw gas input pipeline.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention can effectively recover a large amount of waste heat generated by the phenol-ammonia recovery system during operation by setting up a waste heat recovery system, and reuse it, such as preheating the raw gas and providing heat for the fine treatment unit, thereby greatly improving the energy utilization efficiency and reducing energy consumption and production costs;

[0020] 2. The filtering and condensing devices in the pretreatment device of the present invention can effectively remove impurities and some gaseous substances in the raw gas, thereby improving the quality of raw materials entering the subsequent reaction and separation links. The separation tank adopts a combination of gravity sedimentation area and centrifugal separation area, which can more thoroughly separate the oil phase and water phase of the reaction product, improve the separation efficiency and separation effect, and is beneficial to the subsequent fine treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a schematic diagram of the overall structure of a waste heat utilization device of a phenol-ammonia recovery system.

[0022] In the figure: 1. pre-treatment device; 101. filtering device; 102. condensing device; 2. integrated reaction tower; 201. perforated partition plate; 202. separation layer; 203. reaction layer; 3. separation tank; 301. gravity sedimentation zone; 302. centrifugal separation zone; 303. inclined plate; 304. oil phase outlet; 305. water phase outlet; 4. finishing unit; 401. distillation tower; 402. water phase treatment unit; 403. reboiler; 404. ion exchange resin layer; 405. membrane separation layer; 5. phase change energy storage system; 501. control port one; 502. control port two; 7. intelligent control system; 8. heat exchanger one; 9. heat exchanger two. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, the present invention provides a technical solution:

[0025] A waste heat utilization device of a phenol-ammonia recovery system comprises a phenol-ammonia recovery system, wherein the phenol-ammonia recovery system comprises a preprocessor 1, an integrated reaction tower 2, a separation tank 3 and a fine treatment unit 4, wherein the preprocessor 1 is connected to the integrated reaction tower 2 through a pipeline, the integrated reaction tower 2 is connected to the separation tank 3 through a pipeline, the separation tank 3 is connected to the fine treatment unit 4, the inlet end of the preprocessor 1 is connected to a raw gas input pipeline, a filtering device 101 and a condensing device 102 are arranged inside the preprocessor 1, the filtering device 101 is arranged at an inlet side of the preprocessor 1, the condensing device 102 is arranged at an outlet side of the preprocessor 1, and the integrated reaction tower 2 is connected to the separation tank 3 through a pipeline, the separation tank 3 is connected to the fine treatment unit 4, the inlet end of the preprocessor 1 is connected to a raw gas input pipeline, and a filtering device 101 and a condensing device 102 are arranged inside the preprocessor 1, the filtering device 101 is arranged at an inlet side of the preprocessor 1, the condensing device 102 is arranged at an outlet side of the preprocessor 1, and the integrated reaction tower 2 is connected to the separation tank 3 through a pipeline, the separation tank 3 is connected to the fine treatment unit 4, the inlet end of the preprocessor 1 is connected to a raw gas input pipeline, the filtering device 101 and the condensing device 102 are arranged inside the preprocessor 1 A perforated baffle 201 is provided in the middle of the inner side of the reaction tower 2, and a separation layer 202 and a reaction layer 203 are respectively provided at the upper and lower ends of the perforated baffle 201 of the integrated reaction tower 2, and a gravity sedimentation zone 301 and a centrifugal separation zone 302 are respectively provided at the upper and lower ends of the separation tank 3, and an inclined plate 303 is provided on the left side of the inner wall of the separation tank 3 and close to the lower part of the gravity sedimentation zone 301, and the right side of the inclined plate 303 extends to the inside of the centrifugal separation zone 302, and the finishing unit 4 is composed of a distillation tower 401 and an aqueous phase treatment unit 402, and a reboiler 403 is provided below the distillation tower 401, and the reboiler 403 is connected to the centrifugal separation zone 302 through a pipeline. The distillation tower 401 is connected, and an ion exchange resin layer 404 and a membrane separation layer 405 are arranged in the upper and lower middle parts of the inner side of the water phase treatment unit 402. The oil phase outlet 304 and the water phase outlet 305 are respectively arranged at the upper and lower ends of the right side of the separation tank 3. The oil phase outlet 304 is connected to the distillation tower 401, and the water phase outlet 305 is connected to the water phase treatment unit 402; the waste heat recovery system, the waste heat recovery system consists of a phase change energy storage system 5, a heat exchange network and an intelligent control system 7. The phase change energy storage system 5 is connected to the integrated reaction tower 2, and the heat exchange network consists of a heat exchanger 8 and a heat exchanger 9. One end of the heat exchanger 8 It is connected to the preprocessor 1, and the other end is connected to the integrated reaction tower 2. One end of the heat exchanger 2 9 is connected to the separation tank 3, and the other end is connected to the fine treatment unit 4. The heat exchange network is connected to the phase change energy storage system 5. The intelligent control system 7 is connected to the phase change energy storage system 5 and the heat exchanger 1 8 and the heat exchanger 2 9 through signal lines. A control port 1 501 is provided at one end of the phase change energy storage system 5, and control ports 2 502 are provided at the same direction ends of the heat exchanger 1 8 and the heat exchanger 2 9. One end of the intelligent control system 7 is electrically connected to the control port 1 501, and the other end is electrically connected to the two control ports 2 502 respectively.

[0026] In this embodiment, firstly, by setting up a waste heat recovery system, a large amount of waste heat generated by the phenol-ammonia recovery system during operation can be effectively recovered and reused, such as preheating the raw gas and providing heat for the fine treatment unit 4, which greatly improves the energy utilization efficiency and reduces energy consumption and production costs.

[0027] Then, the filtering and condensing device 102 in the pretreatment unit 1 can effectively remove impurities and some gaseous substances in the raw gas, thereby improving the quality of raw materials entering the subsequent reaction and separation links. The distillation tower 401 and the water phase treatment unit 402 in the fine treatment unit 4 can further purify and purify the products, thereby improving the quality and purity of the phenol-ammonia recovery products.

[0028] Next, the intelligent control system 7 can monitor and control the operating status of the entire device in real time, automatically adjust the working parameters of each part according to the actual situation, realize the automatic operation of the device, reduce manual intervention, and improve production efficiency and operational safety.

[0029] Finally, the separation tank 3 adopts a combination of the gravity settling zone 301 and the centrifugal separation zone 302 to more thoroughly separate the oil phase and the water phase of the reaction product, thereby improving the separation efficiency and separation effect, and facilitating the subsequent fine treatment process.

[0030] Working principle: The raw gas enters the pre-processor 1 through the raw gas input pipeline, first passes through the filtering device 101 to filter out impurities and particulate matter, and then passes through the condensing device 102 to condense part of the gaseous substances in the raw gas into liquid, thereby preliminarily purifying the raw gas; the pre-treated raw gas enters the integrated reaction tower 2 through the pipeline, and a chemical reaction related to phenol and ammonia recovery occurs in the reaction layer 203. The reaction product rises through the perforated partition 201 and enters the separation layer 202 for gas-liquid separation, and the separated liquid and gas enter the subsequent process respectively; the product coming out of the integrated reaction tower 2 enters the separation tank 3, first uses gravity to perform preliminary oil phase and water phase separation in the gravity sedimentation area 301, and then enters the centrifugal separation area 302 through the inclined plate 303 for further separation to improve the separation effect; the oil phase separated from the separation tank 3 enters the distillation tower 401 of the fine treatment unit 4 through the oil phase outlet 304, and the heat is provided by the reboiler 403 in the distillation tower 401 for distillation operation to further purify the product; the water phase enters the water phase treatment unit 402 through the water phase outlet 305, and is treated by the ion exchange resin layer 404 and the membrane separation layer 405 to remove impurities and ions in the water to obtain a purified water phase product; the integrated reaction tower 2 will generate a large amount of waste heat during the reaction process. The waste heat is transferred to the phase change energy storage system 5 through the connecting pipe. The phase change energy storage system 5 utilizes the characteristics of the phase change material to absorb and store the waste heat when the temperature changes. The heat exchanger 1 8 performs heat exchange between the preprocessor 1 and the integrated reaction tower 2, and transfers part of the heat of the integrated reaction tower 2 to the preprocessor 1, so as to preheat the incoming raw gas and improve the energy utilization efficiency. The heat exchanger 2 9 performs heat exchange between the separation tank 3 and the fine treatment unit 4, so as to provide the required heat for the fine treatment unit 4. The intelligent control system 7 is connected to the phase change energy storage system 5, the heat exchanger 1 8 and the heat exchanger 2 9 through the signal line, and monitors the temperature, pressure and other parameters of each part in real time. According to the monitoring data, the intelligent control system 7 adjusts and controls the working status of the phase change energy storage system 5 and the heat exchanger through the control port 1 501 and the control port 2 502, so as to ensure the stable operation and efficient operation of the entire waste heat utilization device.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat utilization device for a phenol-ammonia recovery system, characterized in that: include A phenol-ammonia recovery system, the phenol-ammonia recovery system comprising a pretreatment unit (1), an integrated reaction tower (2), a separation tank (3) and a finishing unit (4), the pretreatment unit (1) being connected to the integrated reaction tower (2) via a pipeline, the integrated reaction tower (2) being connected to the separation tank (3) via a pipeline, and the separation tank (3) being connected to the finishing unit (4); A waste heat recovery system, the waste heat recovery system is composed of a phase change energy storage system (5), a heat exchange network and an intelligent control system (7), the phase change energy storage system (5) is connected to the integrated reaction tower (2), the heat exchange network is composed of a heat exchanger 1 (8) and a heat exchanger 2 (9), one end of the heat exchanger 1 (8) is connected to the preprocessor (1), and the other end is connected to the integrated reaction tower (2), one end of the heat exchanger 2 (9) is connected to the separation tank (3), and the other end is connected to the fine treatment unit (4), and the heat exchange network is connected to the phase change energy storage system (5); The intelligent control system (7) is respectively connected to the phase change energy storage system (5) and the first heat exchanger (8) and the second heat exchanger (9) through signal lines.

2. The waste heat utilization device of a phenol-ammonia recovery system according to claim 1, characterized in that: The pre-processor (1) is provided with a filtering device (101) and a condensing device (102) inside, wherein the filtering device (101) is arranged on the inlet side of the pre-processor (1), and the condensing device (102) is arranged on the outlet side of the pre-processor (1).

3. The waste heat utilization device of a phenol-ammonia recovery system according to claim 1, characterized in that: A perforated partition plate (201) is arranged in the middle of the inner side of the integrated reaction tower (2), and a separation layer (202) and a reaction layer (203) are arranged at the upper and lower ends of the perforated partition plate (201) of the integrated reaction tower (2), respectively.

4. The waste heat utilization device of a phenol-ammonia recovery system according to claim 1, characterized in that: The upper and lower ends of the separation tank (3) are respectively provided with a gravity sedimentation zone (301) and a centrifugal separation zone (302). An inclined plate (303) is provided on the left side of the inner wall of the separation tank (3) and below the gravity sedimentation zone (301). The right side of the inclined plate (303) extends to the inside of the centrifugal separation zone (302).

5. The waste heat utilization device of a phenol-ammonia recovery system according to claim 1, characterized in that: The finishing unit (4) is composed of a distillation tower (401) and a water phase treatment unit (402). A reboiler (403) is arranged below the distillation tower (401). The reboiler (403) is connected to the distillation tower (401) through a pipeline. An ion exchange resin layer (404) and a membrane separation layer (405) are arranged above and below the inner middle part of the water phase treatment unit (402).

6. The waste heat utilization device of a phenol-ammonia recovery system according to claim 1, characterized in that: An oil phase outlet (304) and a water phase outlet (305) are respectively provided at the upper and lower ends of the right side of the separation tank (3); the oil phase outlet (304) is connected to the distillation tower (401), and the water phase outlet (305) is connected to the water phase treatment unit (402).

7. The waste heat utilization device of a phenol-ammonia recovery system according to claim 1, characterized in that: A control port 1 (501) is provided at one end of the phase change energy storage system (5), and a control port 2 (502) is provided at the same-direction end of the heat exchanger 1 (8) and the heat exchanger 2 (9); one end of the intelligent control system (7) is electrically connected to the control port 1 (501), and the other end is electrically connected to the two control ports 2 (502) respectively.

8. The waste heat utilization device of a phenol-ammonia recovery system according to claim 1, characterized in that: The inlet end of the pre-processor (1) is connected to the raw gas input pipeline.

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