CN111974167B

CN111974167B - Hydrogen recovery system is used in PTA production

Info

Publication number: CN111974167B
Application number: CN202010850066.5A
Authority: CN
Inventors: 赵宇; 谢承业; 王中园
Original assignee: Zhejiang Dushan Energy Co ltd
Current assignee: Zhejiang Dushan Energy Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-07-09
Anticipated expiration: 2040-08-21
Also published as: CN111974167A

Abstract

The invention provides a hydrogen recovery system for PTA production. The hydrogen recovery system for PTA production comprises a main body; a condensing mechanism; a spraying mechanism; a cleaning mechanism; the oxygen removing mechanism comprises a filter screen, a support rod, a first heating pipe, an outer cylinder and a catalytic ball, wherein the spiral first heating pipe is arranged in the outer cylinder; a plurality of catalytic balls are arranged inside the filter screen; the dehumidification mechanism comprises an active alumina plate, a partition plate, an air inlet pipe, a fixed cylinder, a second heating pipe, a discharge pipe, a rubber partition plate and a rotating shaft, wherein the active alumina plate and the rotating shaft are rotatably connected with the inside of the rubber partition plate, and the rubber partition plate is fixedly connected with the joint of the main body and the fixed cylinder; the inner side wall of the fixed cylinder is provided with the spiral second heating pipe; a drive mechanism; a force storage mechanism; an adsorption mechanism; and a backflow mechanism. The hydrogen recovery system for PTA production provided by the invention has the advantage of high-speed recovery of high-purity hydrogen.

Description

Hydrogen recovery system is used in PTA production

Technical Field

The invention relates to the technical field of PTA equipment, in particular to a hydrogen recovery system for PTA production.

Background

High-pressure hydrogen is needed to be used in a hydrogenation reactor of the PTA device, only about 30% of hydrogen participates in the reaction in the hydrogen introduced into the reactor, and the rest 70% of hydrogen is not utilized.

Currently, most PTA devices are operated as follows: unreacted hydrogen is discharged into the atmosphere after being washed and treated by a simple process, or the gas is introduced into a tail gas treatment unit for incineration. Either way, the resource is greatly wasted.

Therefore, it is necessary to provide a new hydrogen recovery system for PTA production to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a hydrogen recovery system for PTA production, which can recover high-purity hydrogen at high speed.

In order to solve the above technical problems, the present invention provides a hydrogen recovery system for PTA production, comprising: 1. a hydrogen recovery system for PTA production, comprising: a main body; the condensation mechanism is connected with the bottom end of the main body; the spraying mechanism is arranged inside the bottom end of the main body; a cleaning mechanism fixed inside the main body; the deoxidizing mechanism is connected with the top end of the cleaning mechanism and comprises a filter screen, a support rod, a first heating pipe, an outer cylinder and a catalytic ball, the outer cylinder is installed on the side wall of the main body, the spiral first heating pipe is installed inside the outer cylinder, and two ends of the first heating pipe are respectively connected with the condensing mechanism and the cleaning mechanism; the inside of the main body is rotatably connected with a plurality of filter screens, a plurality of catalytic balls are arranged inside the filter screens, and the middle part inside the filter screens is fixedly connected with the supporting rod; the dehumidification mechanism is rotatably connected with the inside of the top end of the main body and comprises an active alumina plate, a partition plate, an air inlet pipe, a fixed cylinder, a second heating pipe, a discharge pipe, a rubber partition plate and a rotating shaft, the main body and the inside of the fixed cylinder are connected with the active alumina plate in an equidistance manner, the inside of the active alumina plate is fixedly connected with the rotating shaft, the active alumina plate and the rotating shaft are rotatably connected with the inside of the rubber partition plate, and the rubber partition plate is fixedly connected with the connecting part of the main body and the fixed cylinder; the inner side wall of the fixed cylinder is provided with the spiral second heating pipe, and two ends of the second heating pipe are connected with the air inlet pipe and the condensing mechanism; the bottom end of the fixed cylinder is provided with the discharge pipe, and the bottom end of the discharge pipe is connected with the side wall of the spraying mechanism; the two ends of the driving mechanism are respectively connected with the deoxidizing mechanism and the dehumidifying mechanism; the power storage mechanism is arranged at the bottom end of the driving mechanism; the adsorption mechanism is arranged at the top end of the main body; and the backflow mechanism is arranged on the side wall of the main body.

Preferably, the condensing mechanism comprises a condensing pipe, a storage cylinder, a water outlet pipe and a cyclone separator, wherein the top end of the water outlet pipe is connected with the top end of the first heating pipe, and the bottom end of the second heating pipe is connected with the condensing pipe; the spiral condensation pipe is arranged inside the storage cylinder, and the top end of the storage cylinder is connected with the water outlet pipe; the bottom end of the condensing pipe is connected with the side wall of the cyclone separator, and the top surface of the cyclone separator is connected with the bottom end of the main body.

Preferably, the spraying mechanism comprises a water pump, a packing layer, a water tank and a first spraying pipe, the water pump is installed on the bottom surface inside the main body, the packing layer is installed on the inner side wall of the main body at equal intervals, and the water tank is installed on one side of the main body; the first spraying pipe is arranged inside the main body and connected with the water pump.

Preferably, the cleaning mechanism comprises a fixed funnel, a second spray pipe, a drain pipe, a connecting pipe and an outer cover, the fixed funnel is arranged in the main body, the connecting pipe is arranged in the fixed funnel, and the hemispherical outer cover is arranged at the top end of the connecting pipe; the drain pipe with one arc-shaped side wall is arranged in the fixed funnel, the drain pipe is connected with the top end of the water tank, and the drain pipe is connected with the bottom end of the discharge pipe; the second spraying pipe is arranged inside the main body and connected with the bottom end of the first heating pipe.

Preferably, the driving mechanism comprises an air inlet, a turbine, a limiting block, a limiting rod, a gear, a fixing plate, a compression rod, a second spring and a compression groove, the fixing plate is fixedly connected inside the main body, the air inlet is obliquely arranged on the bottom surface of the fixing plate, the turbine is rotatably connected inside the fixing plate, and the bottom end of the turbine is connected with the supporting rod; the top end of the fixed plate is fixedly connected with the rubber partition plate, the top end of the turbine is fixedly connected with the limiting block, the limiting rod is installed inside the limiting block, and the limiting rod is fixedly connected inside the fixed plate; the compression rod is connected to the inside of the limiting block in a sliding mode, the top end of the compression rod abuts against the gear, and the gear is fixedly connected with the bottom end of the rotating shaft; the bottom of stopper is equipped with the lateral wall and is the arc compression groove, the compression groove with the bottom surface sliding connection bottom of gag lever post is spherical the compression rod, the inside suit of compression rod the second spring, just the second spring install in the inside of stopper.

Preferably, the force accumulation mechanism comprises a piston, a third spring and a support plate, the bottom end of the fixed plate is fixedly connected with the support plate, the piston is clamped in the support plate, and the support rod is slidably connected in the piston; and the third spring is arranged between the piston and the fixed plate.

Preferably, the adsorption mechanism comprises an activated carbon plate, a silica gel layer and a molecular sieve, the activated carbon plate, the silica gel layer and the molecular sieve are respectively installed at equal intervals inside the top end of the main body, and the silica gel layer is located between the activated carbon plate and the molecular sieve.

Preferably, the backflow mechanism comprises an installation pipe, a backflow pipe, a fixed block, a floating ball and a first spring, the top end of the main body and the top surface of the fixed plate are respectively connected with the top end of the backflow pipe, and the bottom end of the backflow pipe is respectively connected with the side wall of the main body; the side wall of the backflow pipe is arc-shaped, the fixing block is mounted inside the mounting pipe, the floating ball is mounted inside the fixing block, one end of the floating ball is connected with the first spring, and the first spring is connected with the inside of the backflow pipe.

Compared with the related art, the hydrogen recovery system for PTA production provided by the invention has the following beneficial effects:

the invention provides a hydrogen recovery system for PTA production, when high-temperature and high-pressure tail gas in a hydrogenation reactor of a PTA device enters the interior of a second heating pipe through an air inlet pipe, heat enters the interior of a fixed cylinder, the temperature in the interior of the fixed cylinder is rapidly raised, the primarily cooled tail gas enters the interior of a condensation mechanism, the heat in the tail gas enters the interior of the condensation mechanism, the tail gas is cooled again, water in the condensation mechanism is heated at the same time, the tail gas with low temperature enters the interior of a main body and is contacted with a spraying mechanism, alkali liquor is contacted with the tail gas, terephthalic acid, benzoic acid, p-toluic acid, acetic acid, carbon dioxide and the like in the tail gas are absorbed by the alkali liquor, at the moment, the raised tail gas contains partial alkali liquor, a cleaning mechanism sprays water downwards, and the water removes alkali in the tail gas, the method comprises the following steps that about corrosion of alkali liquor to a catalytic ball is avoided, treated tail gas is in contact with the catalytic ball made of palladium, meanwhile, hot water in a condensation mechanism is heated in the main body, when tail gas enters the inside of a filter screen and is in contact with the catalytic ball, the tail gas is heated, the reaction efficiency of the tail gas is accelerated, oxygen and hydrogen in the tail gas are enabled to generate water under the action of the catalytic ball, the oxygen content in the tail gas is reduced, meanwhile, heat in a first heating pipe is absorbed by the tail gas, cooled water is sprayed out through a cleaning mechanism to clean the alkali liquor in the tail gas, water mixed alkali liquor flows into the spraying mechanism, and waste of water and alkali liquor is avoided; and the tail gas after deoxidization moves upwards to contact with the active alumina plate, so that the active alumina plate adsorbs moisture in the tail gas, when the tail gas moves, the tail gas pushes the driving mechanism to operate, the filter screen and the active alumina plate are driven to rotate, the filter screen rotates to drive the catalytic ball to contact, so that the tail gas is in uniform contact with the catalytic ball, oxygen and hydrogen are convenient to react, the active alumina plate rotates, half of the active alumina plate contacts with the tail gas to absorb moisture, and the other half of the active alumina plate rotates to enter the inside of the fixed cylinder, the inside of the fixed cylinder is heated to high temperature by the second heating pipe, so that the active alumina plate inside the fixed cylinder is dried, the moisture is evaporated to contact with the partition plate, and steam flows downwards to enter the bottom of the fixed cylinder through surface condensation of the partition plate, and discharging water, wherein the activated alumina plate is dried by rotating to contact with tail gas, so that moisture in the tail gas is removed and enters the adsorption mechanism, the adsorption mechanism is used for removing residual high-purity hydrogen in the tail gas again, the recovery efficiency is improved, and the device is integrated to recover the hydrogen and is convenient to use.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of a hydrogen recovery system for PTA production in accordance with the present invention;

FIG. 2 is a top view of the internal structure of the fixed cylinder shown in FIG. 1;

FIG. 3 is a schematic view of the internal structure of the reflow mechanism shown in FIG. 1;

FIG. 4 is an enlarged view of the structure at A shown in FIG. 1;

FIG. 5 is an enlarged view of the structure at B in FIG. 1;

FIG. 6 is a schematic view of the internal structure of the fixing block shown in FIG. 5;

fig. 7 is a schematic view of the limiting rod shown in fig. 6.

Reference numbers in the figures: 1. the device comprises a main body, 2, a spraying mechanism, 21, a water pump, 22, a packing layer, 23, a water tank, 24, a first spraying pipe, 3, a condensing mechanism, 31, a condensing pipe, 32, a storage cylinder, 33, a water outlet pipe, 34, a cyclone separator, 4, a cleaning mechanism, 41, a fixed funnel, 42, a second spraying pipe, 43, a water outlet pipe, 44, a connecting pipe, 45, an outer cover, 5, a deoxidizing mechanism, 51, a filter screen, 52, a support rod, 53, a first heating pipe, 54, an outer cylinder, 55, a catalytic ball, 6, a dehumidifying mechanism, 61, an activated alumina plate, 62, a partition plate, 63, an air inlet pipe, 64, a fixed cylinder, 65, a second heating pipe, 66, a discharging pipe, 67, a rubber partition plate, 68, a rotating shaft, 7, a backflow mechanism, 71, a mounting pipe, 72, a backflow pipe, 73, a fixed block, 74, a floating ball, 75, a first spring, 8, an adsorption mechanism, 81, Silica gel layer, 83, molecular sieve, 9, driving mechanism, 91, air inlet, 92, turbine, 93, limiting block, 94, limiting rod, 95, gear, 96, fixing plate, 97, compression rod, 98, second spring, 99, compression groove, 9a, power storage mechanism, 91a, piston, 92a, third spring, 93a and support plate.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, wherein fig. 1 is a schematic structural diagram of a preferred embodiment of a hydrogen recovery system for PTA production according to the present invention; FIG. 2 is a top view of the internal structure of the fixed cylinder shown in FIG. 1; FIG. 3 is a schematic view of the internal structure of the reflow mechanism shown in FIG. 1; FIG. 4 is an enlarged view of the structure at A shown in FIG. 1; FIG. 5 is an enlarged view of the structure at B in FIG. 1; FIG. 6 is a schematic view of the internal structure of the fixing block shown in FIG. 5; fig. 7 is a schematic view of the limiting rod shown in fig. 6. The hydrogen recovery system for PTA production includes: a main body 1; the condensation mechanism 3 is connected with the bottom end of the main body 1; the spraying mechanism 2 is arranged inside the bottom end of the main body 1; a cleaning mechanism 4, wherein the cleaning mechanism 4 is fixed inside the main body 1; the oxygen removing mechanism 5 is connected with the top end of the cleaning mechanism 4, the oxygen removing mechanism 5 comprises a filter screen 51, a support rod 52, a first heating pipe 53, an outer cylinder 54 and a catalytic ball 55, the outer cylinder 54 is installed on the side wall of the main body 1, the first heating pipe 53 in a spiral shape is installed in the outer cylinder 54, and two ends of the first heating pipe 53 are respectively connected with the condensing mechanism 3 and the cleaning mechanism 4; a plurality of filter screens 51 are rotatably connected to the inside of the main body 1, a plurality of catalytic balls 55 are placed inside the filter screens 51, and the support rod 52 is fixedly connected to the center of the inside of the filter screens 51; the dehumidification mechanism 6 is rotatably connected with the inside of the top end of the main body 1, the dehumidification mechanism 6 comprises an active alumina plate 61, a partition plate 62, an air inlet pipe 63, a fixed cylinder 64, a second heating pipe 65, a discharge pipe 66, a rubber partition plate 67 and a rotating shaft 68, the main body 1 and the fixed cylinder 64 are rotatably connected with the active alumina plate 61 at equal intervals, the active alumina plate 61 is fixedly connected with the rotating shaft 68 at the inside, the active alumina plate 61 and the rotating shaft 68 are rotatably connected with the inside of the rubber partition plate 67, the fixed cylinder 64 with a semicircular cross section is mounted on the side wall of the main body 1, and the rubber partition plate 67 is fixedly connected with the joint of the main body 1 and the fixed cylinder 64; the inner side wall of the fixed cylinder 64 is provided with the spiral second heating pipe 65, and two ends of the second heating pipe 65 are connected with the air inlet pipe 63 and the condensing mechanism 3; the bottom end of the fixed cylinder 64 is provided with the discharge pipe 66, and the bottom end of the discharge pipe 66 is connected with the side wall of the spraying mechanism 2; the two ends of the driving mechanism 9 are respectively connected with the oxygen removing mechanism 5 and the dehumidifying mechanism 6; the power storage mechanism 9a, the power storage mechanism 9a is arranged at the bottom end of the driving mechanism 9; an adsorption mechanism 8, wherein the adsorption mechanism 8 is arranged at the top end of the main body 1; and the backflow mechanism 7 is mounted on the side wall of the main body 1.

Specifically, the condensing mechanism 3 includes a condensing pipe 31, a storage cylinder 32, a water outlet pipe 33 and a cyclone separator 34, wherein the top end of the water outlet pipe 33 is connected to the top end of the first heating pipe 53, and the bottom end of the second heating pipe 65 is connected to the condensing pipe 31; the spiral condensation pipe 31 is arranged inside the storage cylinder 32, and the top end of the storage cylinder 32 is connected with the water outlet pipe 33; the bottom of condenser pipe 31 is connected cyclone 34's lateral wall, just cyclone 34's top surface is connected the bottom of main part 1, for the convenience tail gas gets into the inside screw motion of condenser pipe 31, and water is in the inside from the bottom up motion of storage cylinder 32 makes the heat in the tail gas pass through condenser pipe 31 gets into aquatic, makes the inside water of storage cylinder 32 upwards moves the entering through heating the inside of first heating pipe 53 makes the heat get into the inside of main part 1, partial gas condensation in the tail gas is for liquid, and makes tail gas and liquid get into among cyclone 34, make the liquid of condensation follow cyclone 34's bottom is discharged, and makes the tail gas of detaching liquid after the cooling follow cyclone 34's top surface discharges the entering the bottom of main part 1.

Specifically, the spraying mechanism 2 comprises a water pump 21, a packing layer 22, a water tank 23 and a first spraying pipe 24, the water pump 21 is installed on the inner bottom surface of the main body 1, the packing layer 22 is installed on the inner side wall of the main body 1 at equal intervals, and the water tank 23 is installed on one side of the main body 1; the inside installation of main part 1 first shower 24, just first shower 24 is connected water pump 21, and tail gas is in the inside upward movement of main part 1, water pump 21 will the alkali lye suction of main part 1 bottom in first shower 24 makes alkali lye spray in packing layer 22, makes tail gas and alkali lye evenly contact in packing layer 22, makes alkali lye adsorb terephthalic acid, benzoic acid, p-toluic acid, acetic acid, carbon dioxide in the tail gas.

Specifically, the cleaning mechanism 4 includes a fixed funnel 41, a second shower pipe 42, a water discharge pipe 43, a connecting pipe 44 and an outer cover 45, the fixed funnel 41 is installed inside the main body 1, the connecting pipe 44 is installed inside the fixed funnel 41, and the hemispherical outer cover 45 is installed at the top end of the connecting pipe 44; the fixed funnel 41 is internally provided with the water discharge pipe 43 with an arc-shaped side wall at one end, the water discharge pipe 43 is connected with the top end of the water tank 23, and the water discharge pipe 43 is connected with the bottom end of the discharge pipe 66; the second spraying pipe 42 is installed inside the main body 1, the second spraying pipe 42 is connected with the bottom end of the first heating pipe 53, so that in order to facilitate the tail gas contacting with the alkali liquor to continuously rise, part of the alkali liquor contained in the tail gas is discharged from the inside of the fixed funnel 41 through the connecting pipe 44, water discharged from the first heating pipe 53 is sprayed out through the second spraying pipe 42, clean water and the tail gas are contacted with the surface of the packing layer 22, the alkali liquor in the tail gas is removed by the water, the tail gas moves upwards, the water and the alkali liquor move downwards to enter the surface of the fixed funnel 41, the outer cover 45 prevents the water from entering the connecting pipe 44, the water is discharged through the water discharge pipe 43 with one end being arc-shaped, the inlet of the water discharge pipe 43 is small, the tail gas is prevented from being discharged from the water discharge pipe 43, and the water and the alkali liquor are stored in the water tank, when the alkali liquor in the main body 1 is replaced, a proper amount of high-concentration alkali liquor is added into the water in the water tank 23, so that the concentration of the alkali liquor in the water tank 23 is proper, and then the alkali liquor in the water tank 23 is discharged into the main body 1, so that water and alkali liquor waste is avoided.

Specifically, the driving mechanism 9 includes an air inlet 91, a turbine 92, a limiting block 93, a limiting rod 94, a gear 95, a fixing plate 96, a compression rod 97, a second spring 98 and a compression groove 99, the fixing plate 96 is fixedly connected to the inside of the main body 1, the air inlet 91 is obliquely arranged on the bottom surface of the fixing plate 96, the turbine 92 is rotatably connected to the inside of the fixing plate 96, and the bottom end of the turbine 92 is connected to the support rod 52; the top end of the fixed plate 96 is fixedly connected with the rubber partition plate 67, the top end of the turbine 92 is fixedly connected with the limiting block 93, the limiting rod 94 is installed inside the limiting block 93, and the limiting rod 94 is fixedly connected inside the fixed plate 96; the inside of the limiting block 93 is slidably connected with the compression rod 97, the top end of the compression rod 97 abuts against the gear 95, and the gear 95 is fixedly connected with the bottom end of the rotating shaft 68; the bottom end of the limiting block 93 is provided with a compressing groove 99 with an arc-shaped side wall, the compressing groove 99 is slidably connected with the bottom surface of the limiting rod 94, the bottom end of the compressing groove 99 is spherical, the compressing rod 97 is slidably connected with the bottom surface of the limiting rod 94, the second spring 98 is sleeved inside the compressing rod 97, the second spring 98 is installed inside the limiting block 93, so that in order to facilitate tail gas to enter the inside of the fixing plate 96 through the air inlet 91 in an inclined manner to be in contact with the turbine 92, the turbine 92 rotates to enable the supporting rod 52 and the filter screen 51 to be pushed by the turbine 92 to rotate, the limiting block 93 rotates to drive the compressing rod 97 to rotate, the spherical compressing rod 97 rotates at the bottom end of the limiting rod 94, and when the compressing rod 97 rotates to be in contact with the compressing groove 99, under the action of the second spring 98, the limiting rod 97 is moved upwards in the compression groove 99, the limiting rod 97 is moved upwards to contact with the gear 95, the gear 95 is pushed to rotate, the compression groove 99 presses the compression rod 97 downwards along with the rotation of the limiting rod 94, the compression rod 97 is moved downwards to compress the second spring 98 to enter the limiting block 93, the compression rod 97 is separated from the gear 95, the turbine 92 rotates for one circle, and the gear 95 rotates for one eighth of a circle, so that in the process of rotating the turbine 92, the active alumina plate 61 rotates slowly, the drying time of the active alumina plate 61 is increased, and the moisture in the active alumina plate 61 is effectively removed.

Specifically, the power accumulating mechanism 9a includes a piston 91a, a third spring 92a and a support plate 93a, the bottom end of the fixing plate 96 is fixedly connected to the support plate 93a, the piston 91a is engaged with the inside of the support plate 93a, and the support rod 52 is slidably connected to the inside of the piston 91 a; the third spring 92a is installed between the piston 91a and the fixing plate 96, in order to increase the pressure of the exhaust gas below the supporting plate 93a to a certain extent, the exhaust gas presses the piston 91a, the piston 91a moves upwards to compress the third spring 92a, and the supporting plate 93a is opened, so that the pressure of the exhaust gas entering the exhaust hole 91 is increased, the pressing force of the exhaust gas on the turbine 92 is increased, and the turbine 92 is conveniently pushed to rotate.

Specifically, adsorption mechanism 8 includes activated carbon plate 81, silica gel layer 82 and molecular sieve 83, the inside equidistance installation respectively in top of main part 1 activated carbon plate 81 silica gel layer 82 with molecular sieve 83, just silica gel layer 82 is located activated carbon plate 81 with between the molecular sieve 83, it is a plurality of for convenience activated carbon plate 81 silica gel layer 82 with molecular sieve 83 absorbs once more and gets rid of impurity such as carbon monoxide, carbon dioxide, nitrogen gas, improves the purity of hydrogen.

Specifically, the backflow mechanism 7 includes an installation pipe 71, a backflow pipe 72, a fixed block 73, a floating ball 74 and a first spring 75, the top end of the main body 1 and the top surface of the fixed plate 96 are respectively connected to the top end of the backflow pipe 72, and the bottom end of the backflow pipe 72 is respectively connected to the side wall of the main body 1; the side wall of the return pipe 72 is the arc-shaped installation pipe 71, the fixed block 73 is installed inside the installation pipe 71, the floating ball 74 is installed inside the fixed block 73, one end of the floating ball 74 is connected with the first spring 75, and the first spring 75 is connected with the inside of the return pipe 72, so that hydrogen and tail gas enter the inside of the return pipe 72 in order to facilitate the hydrogen and waste gas discharged from the main body 1 and waste gas discharged from the fixed plate 96 to contact with the floating ball 74 inside the fixed block 73, the floating ball 74 is pushed to move and compress the first spring 75 to open the fixed block 73, the hydrogen and tail gas enter the inside of the main body 1 for retreatment, the purity of the hydrogen discharged from the inside of the main body 1 is improved, and the floating ball 74 blocks the gas backflow inside the main body 1.

In the using process, the device is powered on, a proper amount of alkali liquor is added to the bottom end of the main body 1, the water pump 21 is started, water is continuously injected into the storage cylinder 32, and the water moves upwards in the storage cylinder 32 and is discharged from the water outlet pipe 33 into the first heating pipe 53. Introducing the high-temperature and high-pressure tail gas into the inlet pipe 63, so that the high-temperature tail gas spirally moves downwards in the first heating pipe 65, the temperature in the fixed cylinder 64 is rapidly increased, and the temperature in the tail gas is reduced. Tail gas gets into the inside screw motion of condenser pipe 31, and water is in the inside from the bottom up motion of storage cylinder 32 makes the heat in the tail gas pass through condenser pipe 31 gets into aquatic, makes the inside water of storage cylinder 32 upwards moves the entering through the heating the inside of first heating pipe 53 makes the heat get into the inside of main part 1, partial gas condensation in the tail gas is for liquid, and makes tail gas and liquid get into in cyclone 34, tail gas and liquid are in rotate in cyclone 34, make the liquid of condensation follow cyclone 34's bottom is discharged, and makes the tail gas of detaching liquid after the cooling follow cyclone 34's top surface discharge gets into the bottom of main part 1. The tail gas moves upwards in the main body 1, at the moment, the water pump 21 pumps the alkali liquor at the bottom end of the main body 1 into the first spraying pipe 24, so that the alkali liquor is sprayed into the packing layer 22, the tail gas and the alkali liquor are uniformly contacted in the packing layer 22, and the alkali liquor is used for adsorbing terephthalic acid, benzoic acid, p-methylbenzoic acid, acetic acid and carbon dioxide in the tail gas. The tail gas contacted with the alkali liquor continuously rises, part of the alkali liquor contained in the tail gas is discharged from the inside of the fixed funnel 41 through the connecting pipe 44, water discharged from the first heating pipe 53 is sprayed out through the second spraying pipe 42, clean water and the tail gas are contacted on the surface of the packing layer 22, the alkali liquor in the tail gas is removed by the water, the tail gas moves upwards, the water and the alkali liquor move downwards to enter the surface of the fixed funnel 41, the outer cover 45 prevents the water from entering the connecting pipe 44, the water is discharged through the water discharge pipe 43 with one arc end, the inlet of the water discharge pipe 43 is small, the tail gas is prevented from being discharged from the water discharge pipe 43, and the water and the alkali liquor are stored in the water tank 23 through the water discharge pipe 43. The treated tail gas is contacted with the catalytic ball 55 made of palladium, the first heating pipe 53 is wound on the inner side wall of the fixed cylinder 64, water heated by the tail gas is used for heating the inside of the main body 1, when the tail gas enters the filter screen 51 and is contacted with the catalytic ball 55, the tail gas is heated, the reaction efficiency of the tail gas is accelerated, oxygen and hydrogen in the tail gas are enabled to generate water under the action of the catalytic ball 55, and the oxygen content in the tail gas is reduced. The tail gas moves upwards to contact with the supporting plate 93a, so that the tail gas is accumulated below the supporting plate 93a, the contact time of the tail gas and the catalytic balls 55 is prolonged, and oxygen is effectively removed. When the pressure of the exhaust gas below the supporting plate 93a increases to a certain degree, the exhaust gas presses the piston 91a, so that the piston 91a moves upward to compress the third spring 92a, the supporting plate 93a is opened, thereby increasing the pressure of the exhaust gas entering the exhaust hole 91, increasing the pressing force of the exhaust gas on the turbine 92, rotating the turbine 92, and enabling the turbine 92 to push the supporting rod 52 and the filter screen 51 to rotate, and the filter screen 51 rotates to enable the catalytic ball 55 to shake between the filter screens 51, thereby facilitating the contact between the catalytic ball 55 and the exhaust gas, increasing the reaction time of oxygen and hydrogen, and reducing the oxygen in the exhaust gas. And the worm wheel 92 rotates to drive the limit block 93 to rotate, the limit block 93 drives the compression rod 97 to rotate, so that the spherical compression rod 97 rotates at the bottom end of the limit rod 94, when the compression rod 97 rotates to contact with the compression groove 99, under the action of the second spring 98, the limit rod 97 moves upwards in the compression groove 99, so that the limit rod 97 moves upwards to contact with the gear 95, the gear 95 is pushed to rotate, along with the rotation of the limit rod 94, the compression groove 99 presses the compression rod 97 downwards, so that the compression rod 97 moves downwards to compress the second spring 98 into the limit block 93, the compression rod 97 is separated from the gear 95, the worm wheel 92 rotates for one circle, and the gear 95, the rotating shaft 68 and the active alumina plate 61 rotate for one eighth of a circle, so that the activated alumina plate 61 slowly rotates during the rotation of the turbine 92. Most of the exhaust gas entering the fixed plate 96 enters the return pipe 72, so that most of the exhaust gas enters the lower part of the catalytic ball 55 to be treated again, the pressure inside the main body 1 is increased, and the piston 91a is conveniently pushed by the gas; the other part of the exhaust gas enters the inside of the main body 1 to contact with the active alumina plate 61, and the active alumina plate 61 rotates, half of the active alumina plate 61 contacts with the exhaust gas to absorb moisture, and the other half of the active alumina plate 61 rotates to enter the inside of the fixed cylinder 64, the rubber partition plate 67 clings to the active alumina plate 61 to separate the main body 1 from the inside of the fixed cylinder 64 to prevent the exhaust gas from entering the inside of the fixed cylinder 64, the inside of the fixed cylinder 64 is heated to a high temperature by the second heating pipe 65 to dry the active alumina plate 61 inside the fixed cylinder 64, so that the moisture is evaporated to contact with the partition plate 62, the steam is condensed on the surface of the partition plate 62 and flows downwards to enter the bottom end of the fixed cylinder 64, the water is discharged from the discharge pipe 66 to the inside of the water tank 23, and along with the rotation of the active alumina plate 61, make the stoving activated alumina plate 61 contacts with the tail gas, gets into with the moisture removal in the tail gas inside the top of main part 1, activated carbon plate 81 silica gel layer 82 with molecular sieve 83 absorbs once more and gets rid of impurity such as carbon monoxide, carbon dioxide, nitrogen gas, improves the purity of hydrogen, and most tail gas passes through simultaneously the back flow 72 gets into activated carbon plate 81's below makes most hydrogen with activated carbon plate 81 silica gel layer 82 with molecular sieve 83 contacts once more, improves the follow the concentration of the inside exhaust hydrogen of main part 1. After the water tank is used for a period of time, discharging the alkali liquor in the main body 1, adding a proper amount of high-concentration alkali liquor into the water in the water tank 23 to enable the concentration of the alkali liquor in the water tank 23 to be proper, and then discharging the alkali liquor in the water tank 23 into the main body 1.

the invention provides a hydrogen recovery system for PTA production, when high-temperature and high-pressure tail gas enters the interior of a second heating pipe 65 through an air inlet pipe 63, heat enters the interior of a fixed cylinder 64, the temperature in the interior of the fixed cylinder 64 is rapidly raised, the primarily cooled tail gas enters the interior of a condensation mechanism 3, the heat in the tail gas enters the interior of the condensation mechanism 3, the tail gas is cooled again, water in the interior of the condensation mechanism 3 is heated, the tail gas with low temperature enters the interior of a main body 1 to be contacted with a spraying mechanism 2, alkali liquor is contacted with the tail gas, terephthalic acid, benzoic acid, p-toluic acid, acetic acid, carbon dioxide and the like in the tail gas are absorbed by the alkali liquor, the raised tail gas contains partial alkali liquor, a cleaning mechanism 4 sprays water downwards, and the alkali in the tail gas is removed by the water, the corrosion of alkali liquor to the catalytic ball 55 is avoided, the treated tail gas is contacted with the catalytic ball 55 made of palladium, meanwhile, hot water in the condensing mechanism 3 heats the inside of the main body 1 at the section, when the tail gas enters the inside of the filter screen 51 and is contacted with the catalytic ball 55, the tail gas is heated, the reaction efficiency of the tail gas is accelerated, oxygen and hydrogen in the tail gas generate water under the action of the catalytic ball 55, the oxygen content in the tail gas is reduced, meanwhile, heat in the first heating pipe 53 is absorbed by the tail gas, the cooled water sprays the alkali liquor in the cleaned tail gas through the cleaning mechanism 4, the water mixed alkali liquor flows into the spraying mechanism 2, and the waste of water and alkali liquor is avoided; and the tail gas through deoxidization upward movement with active alumina plate 60 contacts, makes active alumina plate 61 adsorb the moisture in the tail gas, and when the tail gas moved, the tail gas promoted actuating mechanism 9 operates, drives filter screen 51 and active alumina plate 61 rotate, filter screen 51 rotates and drives catalytic ball 55 contact, makes tail gas with catalytic ball 55 even contact, makes things convenient for oxygen and hydrogen reaction, just active alumina plate 61 rotates, half active alumina plate 61 and tail gas contact absorption moisture, and second half active alumina plate 61 rotates and gets into the inside of solid fixed cylinder 64, the inside of solid fixed cylinder 64 is heated to high temperature by second heating pipe 65, makes the inside active alumina plate 61 of solid fixed cylinder 64 dried, makes the moisture evaporation with the baffle 62 contact, steam is in the surface condensation downward flow of baffle 62 gets into the bottom of solid fixed cylinder 64, and discharging water, along with the rotation of the active aluminum oxide plate 61, drying the active aluminum oxide plate 61 and tail gas to contact, removing the moisture in the tail gas to enter the adsorption mechanism 8, so that the adsorption mechanism 8 removes the residual high-purity hydrogen in the tail gas again, the recovery efficiency is improved, and the hydrogen is recovered in an integrated manner by the device, so that the device is convenient to use.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A hydrogen recovery system for PTA production, comprising:

a main body (1);

the spraying mechanism (2) is installed inside the bottom end of the main body (1), the spraying mechanism (2) comprises a water pump (21), a packing layer (22), a water tank (23) and a first spraying pipe (24), the water pump (21) is installed on the bottom surface inside the main body (1), the packing layer (22) is installed on the inner side wall of the main body (1) at equal intervals, and the water tank (23) is installed on one side of the main body (1); the first spray pipe (24) is arranged in the main body (1), and the first spray pipe (24) is connected with the water pump (21);

the oxygen removal device comprises an oxygen removal mechanism (5), wherein the oxygen removal mechanism (5) comprises a filter screen (51), a support rod (52), a first heating pipe (53), an outer cylinder (54) and a catalytic ball (55), the outer cylinder (54) is installed on the side wall of the main body (1), and the first heating pipe (53) in a spiral shape is installed in the outer cylinder (54); the inside of the main body (1) is rotatably connected with a plurality of filter screens (51), a plurality of catalytic balls (55) are arranged inside the filter screens (51), and the center of the inside of each filter screen (51) is fixedly connected with the support rod (52);

a dehumidifying mechanism (6), wherein the dehumidifying mechanism (6) is rotatably connected with the inside of the top end of the main body (1), the dehumidifying mechanism (6) comprises an active alumina plate (61), a clapboard (62), an air inlet pipe (63), a fixed cylinder (64), a second heating pipe (65), a discharging pipe (66), a rubber clapboard (67) and a rotating shaft (68), the main body (1) and the inner part of the fixed cylinder (64) are connected with the active alumina plate (61) in an equidistance rotation way, the inside of the active alumina plate (61) is fixedly connected with the rotating shaft (68), the active alumina plate (61) and the rotating shaft (68) are rotationally connected with the inside of the rubber partition plate (67), the fixed cylinder (64) with a semicircular section is arranged on the side wall of the main body (1), the rubber partition plate (67) is fixedly connected with the joint of the main body (1) and the fixed cylinder (64); the inner side wall of the fixed cylinder (64) is provided with a spiral second heating pipe (65), and one end of the second heating pipe (65) is connected with the air inlet pipe (63); the bottom end of the fixed cylinder (64) is provided with the discharge pipe (66), and the bottom end of the discharge pipe (66) is connected with the side wall of the spraying mechanism (2);

the condensation mechanism (3), the condensation mechanism (3) is connected with the bottom end of the main body (1), the condensation mechanism (3) comprises a condensation pipe (31), a storage cylinder (32), a water outlet pipe (33) and a cyclone separator (34), the top end of the water outlet pipe (33) is connected with the top end of the first heating pipe (53), and the bottom end of the second heating pipe (65) is connected with the condensation pipe (31); the spiral condensation pipe (31) is arranged inside the storage cylinder (32), and the top end of the storage cylinder (32) is connected with the water outlet pipe (33); the bottom end of the condensation pipe (31) is connected with the side wall of the cyclone separator (34), and the top surface of the cyclone separator (34) is connected with the bottom end of the main body (1);

the cleaning mechanism (4) is fixed inside the main body (1), the cleaning mechanism (4) comprises a fixed funnel (41), a second spraying pipe (42), a water discharging pipe (43), a connecting pipe (44) and an outer cover (45), the fixed funnel (41) is installed inside the main body (1), the connecting pipe (44) is installed inside the fixed funnel (41), and the hemispherical outer cover (45) is installed at the top end of the connecting pipe (44); the drainage pipe (43) with one arc-shaped side wall is arranged in the fixed funnel (41), the drainage pipe (43) is connected with the top end of the water tank (23), and the drainage pipe (43) is connected with the bottom end of the discharge pipe (66); the second spray pipe (42) is arranged in the main body (1), and the second spray pipe (42) is connected with the bottom end of the first heating pipe (53);

the two ends of the driving mechanism (9) are respectively connected with the oxygen removing mechanism (5) and the dehumidifying mechanism (6);

the power storage mechanism (9a), the power storage mechanism (9a) is arranged at the bottom end of the driving mechanism (9);

the adsorption mechanism (8) is installed at the top end of the main body (1), the adsorption mechanism (8) comprises an activated carbon plate (81), a silica gel layer (82) and a molecular sieve (83), the activated carbon plate (81), the silica gel layer (82) and the molecular sieve (83) are respectively installed in the top end of the main body (1) at equal intervals, and the silica gel layer (82) is located between the activated carbon plate (81) and the molecular sieve (83);

the backflow mechanism (7), the backflow mechanism (7) is installed on the side wall of the main body (1).

2. The hydrogen recovery system for PTA production as claimed in claim 1, wherein the driving mechanism (9) comprises an air inlet hole (91), a turbine (92), a limiting block (93), a limiting rod (94), a gear (95), a fixing plate (96), a compression rod (97), a second spring (98) and a compression groove (99), the fixing plate (96) is fixedly connected to the inside of the main body (1), the air inlet hole (91) is obliquely arranged on the bottom surface of the fixing plate (96), the turbine (92) is rotatably connected to the inside of the fixing plate (96), and the bottom end of the turbine (92) is connected to the support rod (52); the top end of the fixing plate (96) is fixedly connected with the rubber partition plate (67), the top end of the turbine (92) is fixedly connected with the limiting block (93), the limiting rod (94) is installed inside the limiting block (93), and the limiting rod (94) is fixedly connected inside the fixing plate (96); the compression rod (97) is connected to the inside of the limiting block (93) in a sliding mode, the top end of the compression rod (97) abuts against the gear (95), and the gear (95) is fixedly connected with the bottom end of the rotating shaft (68); the bottom of stopper (93) is equipped with the lateral wall and is the arc compression groove (99), compression groove (99) with the bottom surface sliding connection bottom of gag lever post (94) is spherical compression pole (97), the inside suit of compression pole (97) second spring (98), just second spring (98) install in the inside of stopper (93).

3. The hydrogen recovery system for PTA production as claimed in claim 2, wherein the power accumulating mechanism (9a) comprises a piston (91a), a third spring (92a) and a support plate (93a), the bottom end of the fixing plate (96) is fixedly connected with the support plate (93a), the inner part of the support plate (93a) is clamped with the piston (91a), and the inner part of the piston (91a) is slidably connected with the support rod (52); the third spring (92a) is installed between the piston (91a) and the fixed plate (96).

4. The hydrogen recovery system for PTA production as claimed in claim 3, wherein the return mechanism (7) comprises a mounting tube (71), a return tube (72), a fixed block (73), a floating ball (74) and a first spring (75), the top end of the main body (1) and the top surface of the fixed plate (96) are respectively connected to the top end of the return tube (72), and the bottom end of the return tube (72) is respectively connected to the side wall of the main body (1); the side wall of the return pipe (72) is the arc-shaped installation pipe (71), the fixed block (73) is installed inside the installation pipe (71), the floating ball (74) is installed inside the fixed block (73), one end of the floating ball (74) is connected with the first spring (75), and the first spring (75) is connected with the inside of the return pipe (72).