Acrylonitrile recovery tower kettle liquid treatment system

Abstract

The utility model relates to the technical field of acrylonitrile recovery tower kettle liquid treatment, in particular to an acrylonitrile recovery tower kettle liquid treatment system which comprises a gas incineration device and an incineration shell, a gas outlet flange is arranged at the top of the incineration shell, a gas inlet pipe is fixed in the incineration shell and provided with a ventilation pipe, and the ventilation pipe is provided with a gas outlet flange. The ventilation pipe is communicated with an air inlet pipe, fan blades are rotationally connected into the air inlet pipe and located at the front end of the ventilation pipe, a preheating pipe is wound around the outer ring of the section, located in the incineration shell, of the air inlet pipe, an incineration bin is fixed in the incineration shell, the air outlet end of the air inlet pipe is communicated with the incineration bin, and an air outlet pipe is arranged at the top of the incineration bin. The preheating pipe is wound on the outer wall of the air inlet pipe in a spiral mode, the preheating pipe preheats air in the air inlet pipe, the air outlet end of the preheating pipe is communicated with the incineration bin to achieve circulation of a heat exchange heat source, energy is saved, and the incineration efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to propylene nitrile recovery tower cauldron liquid's processing technical field especially relates to a kind of propylene nitrile recovery tower cauldron liquid processing system. BACKGROUND

[0002] Propylene nitrile is the main raw material for producing high-performance polyacrylonitrile-based carbon fiber, and propylene ammoxidation technology is the main production process for producing propylene nitrile at home and abroad. The waste gas generated in the process flow of the traditional propylene ammoxidation technology is usually purified by a gas incineration device to achieve standard emission of the exhaust gas. A large amount of fuel (natural gas) is consumed every year, the operating cost is high, and smoke dust is generated after waste gas incineration. The dust will adhere to the pipe wall or accumulate on the bottom surface of the incineration bin, which is inconvenient to clean. If the smoke dust is not cleaned in time, it will affect the incineration efficiency and is not conducive to production operation. SUMMARY

[0003] The utility model provides a kind of propylene nitrile recovery tower cauldron liquid processing system.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A kind of propylene nitrile recovery tower cauldron liquid processing system, comprising:

[0006] Collecting tower, collecting tower top is provided with tower cauldron liquid inlet and tower top gas outlet, and collecting tower bottom is provided with tower cauldron liquid outlet;

[0007] Compressor, the gas inlet of the compressor is communicated with the tower top gas outlet of collecting tower, and the gas outlet of the compressor is communicated with heat exchanger;

[0008] Heat exchanger, its gas outlet is communicated with the gas outlet of the compressor, and the liquid outlet of the heat exchanger is communicated with liquid tank;

[0009] Liquid tank, its liquid inlet is communicated with the liquid outlet of the heat exchanger, and the liquid outlet of the liquid tank is communicated with pressure pump;

[0010] Pressure pump, its liquid inlet is communicated with the liquid outlet of the liquid tank, and the liquid outlet of pressure pump is communicated with propylene nitrile quenching tower;

[0011] Stripping column, its liquid inlet is communicated with the liquid outlet of the pressure pump, and the tower top outlet of stripping column is communicated with gas incineration device;

[0012] The gas incineration device comprises an incineration shell, an air inlet pipe fixed in the incineration shell, a fan blade rotatably connected in the air inlet pipe, a preheating pipe wound on an outer ring of the air inlet pipe, an incineration bin fixed in the incineration shell, an air outlet pipe arranged on the top of the incineration bin, a plurality of burner connecting pipes arranged in the incineration bin, a plurality of nozzles arranged on each burner connecting pipe, a slag discharge port arranged on the bottom end face of the incineration shell, a limiting ring fixed in the incineration shell, a slide rail one arranged on the top of the limiting ring, an inclined column rotatably connected to the bottom of the incineration shell, a slide rail two arranged on the bottom of the inclined column, a plurality of balls arranged between the slide rail one and the slide rail two, a plurality of slag scraping plates equidistantly arranged on the outer ring of the limiting ring, a motor support fixed on the bottom of the incineration shell, a rotating motor fixed on the motor support, a power output shaft of the rotating motor fixedly connected to the inclined column, a nut ring fixed on the bottom end face of the incineration shell, and a slag receiving barrel threadedly connected to the nut ring.

[0013] The first liquid outlet of the stripping tower is connected to the biochemical treatment device, and the second liquid outlet of the stripping tower is connected to the acrylonitrile quenching tower.

[0014] The acrylonitrile quenching tower is connected to the liquid outlet of the pressure pump through a first inlet, and connected to the second liquid outlet of the stripping tower through a second inlet.

[0015] The first stripping port of the stripping tower is connected to the air input device, and the second stripping port of the stripping tower is connected to the acrylonitrile absorption tower.

[0016] Further, the stripping tower is a plate tower, and the number of trays of the stripping tower is 25-40.

[0017] Further, the bottom of the stripping tower is provided with an air distributor.

[0018] Further, the bottom of the incineration shell is fixed with a support.

[0019] Further, the air inlet pipe is provided with a sealing valve. Beneficial effects

[0020] The utility model discloses gas burning device, ventilation pipe transports external air to the air inlet pipe, and the fan blade in the air inlet pipe rotates and mixes the waste gas in the air inlet pipe with external air and promotes the oxygen content of waste gas, and the flame from the spout sprays and burns the waste gas in the incineration bin, and most of the high-temperature gas after incineration is discharged through the air outlet pipe, and a small part of high-temperature gas flows into the preheating pipe, and the preheating pipe is spirally wound on the outer wall of the air inlet pipe, and the preheating pipe preheats the gas in the air inlet pipe, and the air outlet end of the preheating pipe is communicated with the incineration bin to realize the circulation of heat exchange heat source, save energy and improve the incineration efficiency.

[0021] The utility model discloses gas burning device, and the sludge produced in the combustion process falls to the conical surface of the inclined column, and the rotating motor starts and drives the rotation of the inclined column, and the inclined column is slidably connected with the limiting ring, and the inclined column can rotate stably and quickly under the action of the ball, and the sludge scraping surface of the sludge scraping plate is tangent to the conical surface of the inclined column, and the sludge scraping plate scrapes the sludge on the conical surface of the inclined column and discharges into the sludge receiving barrel through the sludge discharge port, thereby reducing the cleaning frequency of the incineration bin by the staff and improving the incineration efficiency. DRAWINGS

[0022] Figure 1 It is the structure schematic diagram of the utility model propylene nitrile recovery tower kettle liquid treatment system;

[0023] Figure 2 It is the main view structure schematic of the utility model Figure 1 ;

[0024] Figure 3 It is the main view structure schematic of the utility model Figure 2 ;

[0025] Figure 4 It is the main view structure schematic of the utility model Figure 3 ;

[0026] Figure 4 It is the partial close -up of the utility model Figure 6 A;

[0027] Figure 5 It is the plan view of the utility model Figure 7 Inclined column;

[0028] Figure 5 It is the main view full -section structure schematic of the utility model Figure 8 Limiting ring;

[0029] Figure 5 It is the main view full -section structure schematic of the utility model Figures 1-8 Inclined column.

[0030] In the figure: 1 collection tower, 2 compressor, 3 heat exchanger, 4 liquid storage tank, 5 pressure pump, 6 stripping tower, 7 biochemical treatment device, 8 gas incineration device, 9 acrylonitrile quenching tower, 10 air distributor, 11 air input device, 12 acrylonitrile absorption tower;

[0031] 801 incineration shell, 802 gas outlet flange, 803 support, 804 air inlet pipe, 805 ventilation pipe, 806 sealing valve, 807 fan blade, 808 preheating pipe, 809 incineration bin, 810 gas outlet pipe, 811 flame sparger connecting pipe, 812 spout, 813 slag discharge port, 814 limit ring, 815 sliding rail one, 816 inclined column, 817 sliding rail two, 818 ball bearing, 819 slag scraping plate, 820 motor support, 821 rotating motor, 822 nut ring, 823 slag receiving barrel. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0033] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] Reference Figures 1-8 , an acrylonitrile recovery tower kettle liquid treatment system, comprising:

[0035] The collection tower 1 is provided with a tower kettle liquid inlet and a tower top gas outlet at the top, and a tower kettle liquid outlet at the bottom;

[0036] The compressor 2 is provided with a gas inlet communicated with the tower top gas outlet of the collection tower 1, and a gas outlet communicated with the heat exchanger 3;

[0037] The heat exchanger 3 is provided with a gas outlet communicated with the gas outlet of the compressor 2, and a liquid outlet communicated with the liquid storage tank 4;

[0038] The liquid storage tank 4 is provided with a liquid inlet communicated with the liquid outlet of the heat exchanger 3, and a liquid outlet communicated with the pressure pump 5;

[0039] The pressure pump 5 is provided with a liquid inlet communicated with the liquid outlet of the liquid storage tank 4, and a liquid outlet communicated with the acrylonitrile quenching tower 9;

[0040] a stripping tower 6, a liquid inlet of which is communicated with a liquid outlet of the pressure pump 5, and a tower top outlet of which is communicated with a gas incineration device 8;

[0041] The gas incineration device 8 comprises an incineration shell 801, an air outlet flange 802 is arranged at the top of the incineration shell 801, a support 803 is fixed at the bottom of the incineration shell 801, an air inlet pipe 804 is fixed in the incineration shell 801, the air inlet pipe 804 is provided with a ventilation pipe 805, the ventilation pipe 805 is provided with a sealing valve 806, the ventilation pipe 805 is connected to the air inlet pipe 804, the ventilation pipe 805 transports external air into the air inlet pipe 804, a fan blade 807 is rotatably connected in the air inlet pipe 804, the fan blade 807 is located at the front end of the ventilation pipe 805, the fan blade 807 rotates to mix the waste gas and oxygen in the air inlet pipe 804, a section of the air inlet pipe 804 located in the incineration shell 801 is wound by a preheating pipe 808, the preheating pipe 808 generates heat to preheat the mixed gas in the air inlet pipe 804, an incineration bin 809 is fixed in the incineration shell 801, an air outlet end of the air inlet pipe 804 is connected to the incineration bin 809, an air outlet pipe 810 is arranged at the top of the incineration bin 809, the air outlet pipe 810 is connected to the incineration bin 809, the air outlet pipe 810 is sealingly connected to the air outlet flange 802, an air inlet end of the preheating pipe 808 is connected to the air outlet pipe 810, an air outlet end of the preheating pipe 808 is connected to the incineration bin 809, a plurality of flame jetter connecting pipes 811 are arranged in the incineration bin 809, each flame jetter connecting pipe is provided with a plurality of nozzles 812, a slag discharge port 813 is arranged at the bottom end face of the incineration shell 801, the slag discharge port 813 is connected to the incineration bin 809, a limiting ring 814 is fixed in the incineration shell 801, a slide rail one 815 is arranged at the top of the limiting ring 814, the limiting ring 814 is located in the incineration bin 809, an inclined column 816 is rotatably connected to the bottom of the incineration shell 801, the top of the inclined column 816 is conical, the inclined column 816 is located in the incineration bin 809, a slide rail two 817 is arranged at the bottom of the inclined column 816, the inclined column 816 is movably connected to the limiting ring 814, a plurality of rolling balls 818 are arranged between the slide rail one 815 and the slide rail two 817, a plurality of slag scraping plates 819 are equidistantly arranged at the outer ring of the limiting ring 814, the slag scraping surface of the slag scraping plate 819 is tangent to the conical surface of the inclined column 816, a motor support 820 is fixed at the bottom of the incineration shell 801, a rotating motor 821 is fixed on the motor support 820, the power output shaft of the rotating motor 821 is fixedly connected to the inclined column 816, a nut ring 822 is fixed at the bottom end face of the incineration shell 801, a slag receiving barrel 823 is threadedly connected to the nut ring;

[0042] A first liquid outlet of the stripping tower 6 is connected to the biochemical treatment device 7, and a second liquid outlet of the stripping tower 6 is connected to the acrylonitrile quenching tower 9.

[0043] an acrylonitrile quenching tower 9, a first inlet of which is communicated with the liquid outlet of the pressure pump 5, and a second inlet of which is communicated with the second liquid outlet of the stripping tower 6;

[0044] The stripping tower 6 is a plate tower, and the number of trays of the stripping tower 6 is 25-40;

[0045] The bottom of the stripping tower 6 is provided with an air distributor 10;

[0046] A first stripping port of the stripping tower 6 is communicated with an air input device 11, and a second stripping port of the stripping tower 6 is communicated with an acrylonitrile absorption tower 12.

[0047] Referring to ​ As shown in the figure, a kind of acrylonitrile recovery tower kettle liquid processing system, when running, recovery tower kettle liquid flows into collection tower 1, heat exchanger 3 is heated to collection tower 1, the top steam generated in the heating process of collection tower 1 is obtained high-temperature and high-pressure gas by compressor 2, as heat source flows into heat exchanger 3, high-temperature gas in heat exchanger 3 carries out heat exchange process and produces condensate, the condensate in heat exchanger 3 is collected into liquid storage tank 4, pressure pump 5 starts and extracts the liquid in liquid storage tank 4 to acrylonitrile quenching tower 9, the first stripping port of stripping tower 6 is communicated with air input device 11, the second stripping port of stripping tower 6 is communicated with the tail gas outlet of acrylonitrile absorption tower 12, air and acrylonitrile absorption tower 12 tail gas are used as stripping gas at the same time to extract organic matter in tower kettle condensate, reduce the input of steam heat source, improve stripping effect, the waste gas generated in the operation process of stripping tower 6 is incinerated by gas incineration device 8.

[0048] The gas incineration device 8, when in operation, the exhaust gas flows into the incineration bin 809 through the air inlet pipe 804, the external air enters the air inlet pipe 804 through the air vent pipe 805 in the process of flowing through the air inlet pipe 804, the fan blade 807 in the air inlet pipe 804 rotates to mix the exhaust gas in the air inlet pipe 804 with the external air to increase the oxygen content of the exhaust gas, the torch connecting pipe 811 is communicated with the torch, the flame is sprayed out from the nozzle 812 to incinerate the exhaust gas in the incineration bin 809, most of the high-temperature gas after incineration is discharged through the air outlet pipe 810, a small part of the high-temperature gas flows into the preheating pipe 808, the preheating pipe 808 is spirally wound on the outer wall of the air inlet pipe 804, the preheating pipe 808 preheats the gas in the air inlet pipe 804, the air outlet end of the preheating pipe 808 is communicated with the incineration bin 809 to realize the circulation of the heat exchange heat source, the sludge generated in the combustion process falls on the conical surface of the inclined column 816, the rotating motor is started to drive the inclined column 816 to rotate, the inclined column 816 is slidingly connected with the limiting ring 814, the inclined column 816 can rotate stably and quickly under the action of the ball bearing 818, the scraping surface of the slag scraping plate 819 is tangent to the conical surface of the inclined column 816, the slag scraping plate 819 scrapes the sludge on the conical surface of the inclined column 816 and discharges the sludge into the slag receiving barrel 823 through the slag discharge port 813, the cleaning frequency of the staff on the incineration bin 809 is reduced, and the incineration efficiency is improved.

[0049] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An acrylonitrile recovery column still liquid treatment system characterized by, Comprise: A collection tower (1), which is provided with a tower kettle liquid inlet and a tower top gas outlet at the top, and a tower kettle liquid outlet at the bottom; A compressor (2), the gas inlet of which is communicated with the tower top gas outlet of the collection tower (1), and the gas outlet of which is communicated with a heat exchanger (3); A heat exchanger (3), the gas outlet of which is communicated with the gas outlet of the compressor (2), and the liquid outlet of which is communicated with a liquid storage tank (4); A liquid storage tank (4), the liquid inlet of which is communicated with the liquid outlet of the heat exchanger (3), and the liquid outlet of which is communicated with a pressure pump (5); A pressure pump (5), the liquid inlet of which is communicated with the liquid outlet of the liquid storage tank (4), and the liquid outlet of which is communicated with an acrylonitrile quenching tower (9); A stripping tower (6), the liquid inlet of which is communicated with the liquid outlet of the pressure pump (5), and the tower top outlet of which is communicated with a gas incineration device (8); The gas incineration device (8) comprises an incineration shell (801), the top of the incineration shell (801) is provided with an air outlet flange (802), the incineration shell (801) is fixedly provided with an air inlet pipe (804), the air inlet pipe (804) is provided with a ventilation pipe (805), the ventilation pipe (805) is connected to the air inlet pipe (804), the air inlet pipe (804) is rotatably connected with a fan blade (807), the fan blade (807) is located at the front end of the ventilation pipe (805), a section of the air inlet pipe (804) located in the incineration shell (801) is wound with a preheating pipe (808), the incineration shell (801) is fixedly provided with an incineration bin (809), the air outlet end of the air inlet pipe (804) is connected to the incineration bin (809), the top of the incineration bin (809) is provided with an air outlet pipe (810), the air outlet pipe (810) is connected to the incineration bin (809), the air outlet pipe (810) is sealingly connected to the air outlet flange (802), the air inlet end of the preheating pipe (808) is connected to the air outlet pipe (810), the air outlet end of the preheating pipe (808) is connected to the incineration bin (809), a plurality of burner connecting pipes (811) are connected to the incineration bin (809), each burner connecting pipe is provided with a plurality of nozzles (812), the bottom end surface of the incineration shell (801) is provided with a slag discharge port (813), the slag discharge port (813) is connected to the incineration bin (809), the incineration shell (801) is fixedly provided with a limiting ring (814), the top of the limiting ring (814) is provided with a sliding rail I (815), the limiting ring (814) is located in the incineration bin (809), the bottom of the incineration shell (801) is rotatably connected with an inclined column (816), the top of the inclined column (816) is conical, the inclined column (816) is located in the incineration bin (809), the bottom of the inclined column (816) is provided with a sliding rail II (817), the inclined column (816) is movably connected with the limiting ring (814), a plurality of ball bearings (818) are arranged between the sliding rail I (815) and the sliding rail II (817), a plurality of slag scraping plates (819) are equidistantly arranged on the outer ring of the limiting ring (814), the slag scraping surface of the slag scraping plate (819) is tangent to the conical surface of the inclined column (816), the bottom of the incineration shell (801) is fixedly provided with a motor support (820), the motor support (820) is fixedly provided with a rotating motor (821), the power output shaft of the rotating motor (821) is fixedly connected with the inclined column (816), the bottom end surface of the incineration shell (801) is fixedly provided with a nut ring (822), the nut ring is threadedly connected with a slag receiving barrel (823); The first liquid outlet of the stripping tower (6) is connected to the biochemical treatment device (7), and the second liquid outlet of the stripping tower (6) is connected to the acrylonitrile quenching tower (9); The acrylonitrile quenching tower (9) is connected to the liquid outlet of the pressure pump (5) through a first inlet and connected to the second liquid outlet of the stripping tower (6) through a second inlet. The first stripping port of the stripping tower (6) is communicated with an air input device (11), and the second stripping port of the stripping tower (6) is communicated with an acrylonitrile absorption tower (12).

2. The acrylonitrile recovery tank liquid treatment system according to claim 1, characterized in that: The stripping tower (6) is a plate tower, and the number of tower plates of the stripping tower (6) is 25-40.

3. The acrylonitrile recovery tank liquid treatment system of claim 1, wherein: An air distributor (10) is arranged at the bottom of the stripping tower (6).

4. The acrylonitrile recovery tank liquid treatment system of claim 1, wherein: A support (803) is fixed at the bottom of the incineration shell (801).

5. The acrylonitrile recovery tank liquid treatment system of claim 1, wherein: The ventilation pipe (805) is provided with a sealing valve (806).

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