CN114570169A - Ammonia water loading ammonia recovery system - Google Patents
Ammonia water loading ammonia recovery system Download PDFInfo
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- CN114570169A CN114570169A CN202210496383.0A CN202210496383A CN114570169A CN 114570169 A CN114570169 A CN 114570169A CN 202210496383 A CN202210496383 A CN 202210496383A CN 114570169 A CN114570169 A CN 114570169A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
- B01D53/185—Liquid distributors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1406—Multiple stage absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1418—Recovery of products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention relates to the technical field of ammonia recovery, in particular to an ammonia water truck-mounted ammonia gas recovery system which comprises a recovery tank connected with an exhaust port of an ammonia water tank truck, wherein the inner cavity of the recovery tank sequentially comprises three independent ammonia gas absorption areas from bottom to top, the three ammonia gas absorption areas are respectively provided with a desalted water sensor and an ammonia water concentration sensor, one of the three ammonia gas absorption areas is used as a primary absorption area, the other ammonia gas absorption area is used as a secondary absorption area, the tail gas sequentially passes through the primary absorption area and the secondary absorption area from the exhaust port and is discharged into air, when the ammonia water concentration in the primary absorption area reaches a target value, the primary absorption area is switched into the standby area, meanwhile, the secondary absorption area is switched into the primary absorption area, and the standby area is switched into the secondary absorption area, so that dynamic and continuous ammonia gas recovery is formed. The ammonia water truck loading device can realize continuous loading of ammonia water, has high absorption efficiency of ammonia gas in the tail gas of the truck loading, improves the efficiency of loading the ammonia water and the recovery and utilization rate of the ammonia gas, and reduces environmental pollution.
Description
Technical Field
The invention relates to the technical field of ammonia recovery, in particular to an ammonia recovery system for loading ammonia water.
Background
Along with the rapid development of modern industrial production, the effective control of environmental pollution is more and more important, the rapid development of China's society, economy and science and technology is a great progress of the Chinese's atmospheric pollution control technical level, equipment level and management level,
the ammonia water produced in the ammonia synthesis plant is generally produced by absorbing ammonia gas through water circulation by utilizing the principle that ammonia gas is very soluble in water. However, when the ammonia reaches a certain concentration or as the pressure and temperature increase, part of the ammonia gas is volatilized. Because ammonia has very easily volatile characteristics, at aqueous ammonia loading in-process, the aqueous ammonia storage tank fills the dress for the tank wagon through the pump, and the pump is given aqueous ammonia certain pressure and along with the increase of the volume of filling, the volume of volatilizing of ammonia increase, directly leads to the pressure crescent in the tank wagon. In order to ensure continued filling and safe operation, it is necessary to vent the gas within the tank car. Because the gas contains a large amount of ammonia, if the ammonia is directly discharged, the environment is polluted, unnecessary resource waste is caused, and the production cost of enterprises is increased.
In order to carry out recovery processing to the tail gas that the ammonia loading in-process produced, can be equipped with one and retrieve jar or recovery tower usually, hold demineralized water in jar or the tower, when tail gas passes through the demineralized water, ammonia and water take place the reaction and generate the aqueous ammonia, and the direct evacuation of tail gas after the purification. However, the recycling system in the prior art has the following problems:
1. when the concentration of the ammonia water in the recovery tank or the recovery tower reaches a target value, ammonia water loading needs to be suspended, the ammonia water is discharged, and loading can be continued only after new desalted water is introduced, so that the working efficiency is reduced;
2. the existing recovery system usually only carries out one-time absorption treatment on tail gas, and the exhausted tail gas still carries a certain amount of ammonia gas, so that the absorption effect is not ideal;
3. the reaction of ammonia and water is exothermic, and with the reaction, when the temperature of water in the recovery tank continuously rises, reverse reaction easily occurs, so that the absorption speed of ammonia becomes slow and the absorption is incomplete.
Disclosure of Invention
In order to solve the technical problems, the invention provides an ammonia water truck-loading ammonia gas recovery system which comprises a recovery tank connected with an exhaust port of an ammonia water tank truck, wherein the inner cavity of the recovery tank sequentially comprises three independent ammonia gas absorption areas from bottom to top, the three ammonia gas absorption areas are respectively provided with an ammonia water concentration sensor and desalted water, one of the three ammonia gas absorption areas is used as a primary absorption area, the other ammonia gas absorption area is used as a secondary absorption area, tail gas passes through the primary absorption area and the secondary absorption area from the exhaust port in sequence and then is discharged into air, ammonia gas in the tail gas reacts with the desalted water to generate ammonia water, when the ammonia water concentration in the primary absorption area reaches a target value, the primary absorption area is switched into a standby area, the ammonia water is discharged and then is introduced into the desalted water for standby, and meanwhile, the secondary absorption area is switched into the primary absorption area, the standby area is switched into a secondary absorption area to form dynamic and continuous ammonia recovery.
Preferably, every the lateral wall below of ammonia absorption zone all is equipped with gas inlet, demineralized water entry and aqueous ammonia export, and the lateral wall top all is equipped with gas outlet, gas inlet passes through inlet manifold intercommunication inlet manifold, inlet manifold intercommunication gas vent, be equipped with the motorised valve on the inlet manifold, the demineralized water entry is through desalting water union coupling demineralized water feed mechanism, be equipped with the motorised valve on the desalting water pipe, the aqueous ammonia export is through ammonia water union coupling aqueous ammonia storage device, be equipped with the motorised valve on the aqueous ammonia pipe, connect the three-way pipe on the gas outlet, be equipped with two motorised valves on the three-way pipe, can select inlet manifold or the atmosphere that communicates second grade absorption zone, the PLC controller is all connected to aqueous ammonia concentration sensor and each motorised valve.
Preferably, all be equipped with above the demineralized water liquid level in the ammonia absorption district and spray the mechanism, the water pump with the demineralized water pump sending in the ammonia absorption district to spray the mechanism, spray the horizontal inlet tube that the mechanism includes and communicates with the water pump, the end of intaking of inlet tube is equipped with aqueous ammonia concentration sensor, goes out the water end and connects the rotation and spray the subassembly.
Preferably, the rotatory subassembly that sprays include with the first seal housing of inlet tube intercommunication, the inside level of first seal housing is equipped with turbine blade, the sealed cylindrical second seal housing of rotatable intercommunication in upper and lower both ends, the vertical pivot of turbine blade center department fixed connection, the upper and lower both ends of pivot are equipped with the horizontally connecting rod respectively, connecting rod fixed connection the second seal housing, the sealed casing lateral wall circumference of second equals to be equipped with a plurality of shower, the shower is kept away from first seal housing one side is equipped with fan nozzle.
Preferably, the second seal housing is rotatably connected with the first seal housing through a seal bearing, the fan-shaped nozzles are arranged in the length direction of the spray pipe at equal intervals, the aperture of the spray holes increases progressively along the direction far away from the spray pipe, the fan-shaped nozzles incline towards the inner wall of the recovery tank, and the inclination angle alpha is 10-80 degrees.
Preferably, every all be equipped with ammonia distribution mechanism below the demineralized water liquid level in the ammonia absorption zone, ammonia distribution mechanism includes stub pipe and the arc tube that the level set up, stub pipe one end intercommunication gas inlet, the other end intercommunication the arc tube, the radial equidistance of intrados of arc tube is equipped with a plurality of short branch pipes, short branch pipe passes through rotary joint intercommunication spiral tie distributing pipe, on two spirals of spiral tie distributing pipe respectively the equidistance be equipped with a plurality ofly with the jet-propelled pipe of normal line vertically on spiral limit.
Preferably, the lateral wall of retrieving the jar is equipped with cooling coil, cooling coil intercommunication cooling water circulation mechanism, cooling water circulation mechanism with retrieve the jar and all set up on the sled dress seat, still be equipped with on the sled dress seat and place the support of water pump.
Preferably, the bottom of recovery tank is equipped with the cooling water inflow region, and the top in every ammonia absorption region is equipped with a sealed cooling water outflow region respectively, the total three-section of cooling coil encircles the demineralized water that locates three ammonia absorption regions about in the top and bottom respectively and holds the region to communicate the cooling water outflow region in the corresponding ammonia absorption region respectively, the cooling coil intercommunication cooling water inflow region of the lower section, cooling water flows into the cooling water inflow region of recovery tank from cooling water circulation mechanism, flows into each cooling water outflow region through cooling coil, finally flows into cooling water circulation mechanism from the cooling water outflow region of recovery tank the top.
Preferably, a cooling water inlet communicated with a section of cooling coil below is arranged below the side wall of the cooling water outflow area, a cooling water outlet communicated with a section of cooling coil above is arranged above the side wall, a gas outlet is arranged above the side wall on the side opposite to the cooling water inlet, a U-shaped corrugated gas collecting pipe is horizontally arranged in the cooling water outflow area, and the gas collecting pipe is respectively communicated with the ammonia gas absorption area and the gas outlet.
Preferably, the gas collecting pipe is internally provided with a U-shaped corrugated cold water pipe corresponding to the gas collecting pipe, the bottom of the gas collecting pipe is provided with a gas guide pipe communicated with the ammonia gas absorption area in a sealing manner, one end of the cold water pipe penetrates through the gas collecting pipe in a sealing manner and is communicated with the cooling water inlet, the other end of the cold water pipe is close to the gas outlet and penetrates through the gas collecting pipe in a sealing manner and is communicated with the cooling water outlet area, and the gas guide pipes are arranged at the lowest points of U-shaped corrugations of the gas collecting pipe respectively.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the ammonia recovery system for loading ammonia water in the ammonia water truck is provided with the recovery tank with three independent ammonia absorption areas, continuous loading of ammonia water can be realized by dynamically switching the primary absorption area, the secondary absorption area and the standby area in the recovery tank, the efficiency of loading ammonia water in the ammonia water truck is improved, in addition, secondary absorption can be carried out on tail gas, the recovery utilization rate of ammonia gas is further improved, and environmental pollution is reduced;
2. each ammonia gas absorption area is internally provided with a spraying mechanism capable of forming an upper layer and a lower layer of rotary multi-stage water curtains, and water pumps of the primary absorption area and the secondary absorption area pump demineralized water to the spraying mechanism to form the rotary multi-stage water curtains, so that the capture and absorption rate of ammonia gas in tail gas are improved;
3. an ammonia gas distribution mechanism is arranged in each ammonia gas absorption area, and a spiral band distribution pipe on the ammonia gas distribution mechanism is matched with a water pump to carry out rotary stirring type dispersion, so that the dispersion effect of tail gas in the desalted water can be further improved, and the absorption efficiency is improved;
4. each ammonia absorption area is provided with a triple cooling structure, so that the cooling effect can be greatly improved, and the recovery rate of ammonia is improved;
in conclusion, the ammonia recovery system for loading ammonia water can realize continuous loading of ammonia water, has high absorption efficiency on ammonia gas in loading tail gas, improves the efficiency of loading ammonia water and the recovery utilization rate of ammonia gas, and reduces environmental pollution.
Drawings
FIG. 1 is a diagram of an ammonia recovery system for loading ammonia water;
FIG. 2 is a schematic view showing an external structure of the recovery tank of FIG. 1;
FIG. 3 is a schematic perspective view of the spraying mechanism;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a top view of the ammonia gas distribution mechanism;
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;
fig. 7 is a schematic plan view of the cooling water outflow region and the gas collecting pipe.
Description of reference numerals:
1. an ammonia tank truck, 11, an ammonia water inlet, 12, an exhaust port, 2, a recovery tank, 21, an ammonia gas absorption area, 211, a bottom absorption area, 212, a middle absorption area, 213, a top absorption area, 22, a gas inlet, 23, a demineralized water inlet, 24, an ammonia water outlet, 25, a gas outlet, 26, a cooling water inflow area, 27, a cooling water outflow area, 271, a cooling water inlet, 272, a cooling water outlet, 5, a spraying mechanism, 51, a water inlet pipe, 52, a rotary spraying assembly, 521, a first sealed shell, 522, a turbine blade, 523, a rotating shaft, 524, a connecting rod, 525, a second sealed shell, 526, a sealed bearing, 527, a spraying pipe, 528, a fan-shaped nozzle, 53, an ammonia water concentration sensor, 6, a water pump, 7, an ammonia gas distribution mechanism, 71, a short main pipe, 72, an arc pipe, 73, a short branch pipe, 74, a rotary joint, 75, a spiral tie distribution pipe, 751. spiral edge 752, gas ejector pipe 8, cooling coil 81, lower coil 82, middle coil 83, upper coil 9, gas collector 91, cold water pipe 92, gas guide pipe.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings and examples:
it should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the following claims, and all modifications of the structures, changes in the proportions and adjustments of the sizes and other dimensions which are within the scope of the disclosure should be understood and encompassed by the present disclosure without affecting the efficacy and attainment of the same.
In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example 1
With reference to fig. 1 and 2, the embodiment provides an ammonia water loading ammonia gas recovery system, which comprises a recovery tank 2 connected with an exhaust port 12 of an ammonia water tank truck 1, wherein an inner cavity of the recovery tank 2 sequentially comprises three independent ammonia gas absorption areas 21 from bottom to top, the three ammonia gas absorption areas 21 are respectively provided with an ammonia water concentration sensor 53 and demineralized water, one of the three ammonia gas absorption areas 21 is used as a primary absorption area and the other is used as a secondary absorption area, tail gas sequentially passes through the primary absorption area and the secondary absorption area from the exhaust port 12 and then is discharged into air, ammonia gas in the tail gas reacts with the demineralized water to generate ammonia water, when the concentration of the ammonia water in the primary absorption area reaches a target value, the primary absorption area is switched into the standby area, the demineralized water is introduced for standby after the ammonia water is discharged, meanwhile, the secondary absorption area is switched into the primary absorption area and the standby area is switched into the secondary absorption area, dynamic and continuous ammonia recovery is formed. In the above technical solution, the demineralized water does not fill the whole ammonia absorption zone 21, which is common knowledge in the art, and thus, will not be described again.
As shown in fig. 2, a gas inlet 22, a demineralized water inlet 23 and an ammonia water outlet 24 are arranged below the side wall of each ammonia gas absorption zone 21, a gas outlet 25 is arranged above the side wall, as shown in fig. 1, the gas inlet 22 is communicated with a gas inlet main pipe through a gas inlet branch pipe, the gas inlet main pipe is communicated with the exhaust port 12, an electric valve is arranged on the gas inlet branch pipe, the demineralized water inlet 23 is connected with a demineralized water supply mechanism (not shown) through a demineralized water pipe (not shown), the demineralized water pipe is provided with an electric valve (not shown), the ammonia water outlet 24 is connected with an ammonia water storage device (not shown) through an ammonia water pipe (not shown), the ammonia water pipe is provided with an electric valve (not shown), the gas outlet 25 is connected with a three-way pipe, the three-way pipe is provided with two electric valves, and one of the gas inlet branch pipe or the atmosphere communicated with the secondary absorption zone can be selected, the ammonia water concentration sensor 53 and each electric valve are connected with a PLC controller.
The working principle and process of the embodiment are as follows: for convenience of further description, the three ammonia gas absorption zones 21 are sequentially marked as a bottom absorption zone 211, a middle absorption zone 212 and a top absorption zone 213 from bottom to top, in an initial state, the bottom absorption zone 211 is selected as a primary absorption zone, an electric valve between an air inlet branch pipe and an air inlet main pipe of the bottom absorption zone 211 is opened, an electric valve communicated with the atmosphere on a three-way pipe is closed, and an electric valve communicated with the air inlet branch pipe of the middle absorption zone 212 is opened; the middle absorption area 212 is used as a secondary absorption area, an electric valve between an air inlet branch pipe and an air inlet main pipe of the middle absorption area 212 is closed, an electric valve communicated with the atmosphere on a three-way pipe is opened, and an electric valve communicated with an air inlet branch pipe of the top absorption area 213 is closed; the top absorption zone 213 serves as a back-up zone, and the electric valves between the inlet branch and inlet manifold of the top absorption zone 213 and the two electric valves on the tee are both closed.
When ammonia water is loaded, ammonia water to be loaded is pumped from an ammonia water storage device (not shown in the figure) to a feed inlet 11 of the ammonia water tank truck 1, tail gas containing ammonia gas flows out from an exhaust port 12 of the ammonia water tank truck 1, and the tail gas is discharged to the atmosphere from a gas inlet manifold of a gas inlet header pipe-bottom absorption zone 211, a demineralized water zone of the bottom absorption zone 211, a gas outlet 25 of the bottom absorption zone 211, a gas inlet manifold of a middle absorption zone 212, a demineralized water zone of the middle absorption zone 212 and a gas outlet 25 of the middle absorption zone 212.
When the ammonia water concentration sensor 53 of the bottom absorption zone 211 detects that the concentration of the ammonia water generated in the bottom absorption zone 211 reaches a target value, the PLC automatically switches the air inlet passage, the bottom absorption zone 211 is converted into a standby zone, the electric valve between the air inlet branch pipe and the air inlet main pipe of the bottom absorption zone 211 is closed, and the two electric valves on the three-way pipe are both closed; the middle absorption area 212 is converted into a first-stage absorption area, an electric valve between an air inlet branch pipe and an air inlet main pipe of the middle absorption area 212 is opened, an electric valve communicated with the atmosphere on a three-way pipe is closed, and an electric valve communicated with an air inlet branch pipe of the top absorption area 213 is opened; the top absorption zone 213 is converted into a secondary absorption zone, an electric valve between an air inlet branch pipe and an air inlet main pipe of the top absorption zone 213 is closed, an electric valve communicated with the atmosphere on a three-way pipe is opened, and an electric valve communicated with an air inlet branch pipe of the bottom absorption zone 211 is closed; the tail gas is now discharged to the atmosphere from the inlet manifold-inlet leg of the middle absorption zone 212-demineralized water zone of the middle absorption zone 212-gas outlet 25 of the middle absorption zone 212-inlet leg of the top absorption zone 213-demineralized water zone of the top absorption zone 213-gas outlet 25 of the top absorption zone 213. The ammonia water in the bottom absorption zone 211 is discharged to the ammonia water storage device, and then the desalted water is pumped into the bottom absorption zone 211 again to enter a standby state.
When the ammonia water concentration sensor 53 of the middle absorption area 212 detects that the concentration of ammonia water generated in the middle absorption area 212 reaches a target value, the PLC automatically switches the air inlet passages, the middle absorption area 212 is converted into a standby area, the electric valves between the air inlet branch pipe and the air inlet main pipe of the middle absorption area 212 are closed, and the two electric valves on the three-way pipe are closed; the top absorption zone 213 is converted into a primary absorption zone, an electric valve between an air inlet branch pipe and an air inlet main pipe of the top absorption zone 213 is opened, an electric valve communicated with the atmosphere on a three-way pipe is closed, and an electric valve communicated with an air inlet branch pipe of the bottom absorption zone 211 is opened; the bottom absorption zone 211 is converted into a secondary absorption zone, an electric valve between an air inlet branch pipe and an air inlet main pipe of the bottom absorption zone 211 is closed, an electric valve communicated with the atmosphere on a three-way pipe is opened, and an electric valve communicated with an air inlet branch pipe of the middle absorption zone 212 is closed; at this time, the off-gas is discharged to the atmosphere from the inlet manifold of the top absorbing zone 213, the demineralized water zone of the top absorbing zone 213, the gas outlet 25 of the top absorbing zone 213, the inlet manifold of the bottom absorbing zone 211, the demineralized water zone of the bottom absorbing zone 211, and the gas outlet 25 of the bottom absorbing zone 211. The ammonia water in the middle absorption region 212 is discharged to the ammonia water storage device, and then the desalted water is pumped into the middle absorption region 212 again to enter a standby state.
When the ammonia concentration sensor 53 of the top absorption region 213 detects that the ammonia concentration generated in the top absorption region 213 reaches the target value, the PLC controller automatically switches the intake passage, and the process and the principle are the same as those described above, at this time, the bottom absorption region 211 is converted into the first-stage absorption region again, the middle absorption region 212 is converted into the second-stage absorption region again, and the top absorption region 213 is converted into the standby region again.
The ammonia water loading ammonia recovery system in this embodiment has been equipped with recovery tank 2 that has three independent ammonia absorption zone 21, through the dynamic switch to one-level absorption zone, second grade absorption zone and reserve area in recovery tank 2, can realize the continuous loading of ammonia water, improves ammonia water loading efficiency, in addition, carries out the second grade to tail gas and absorbs, has further improved the recycle ratio of ammonia, reduces environmental pollution.
Example 2
With reference to fig. 1 to 4, this embodiment provides an ammonia water loading ammonia gas recovery system, on the basis of embodiment 1, spraying mechanisms 5 are provided above the liquid level of the demineralized water in the ammonia gas absorption area 21, a water pump 6 pumps the demineralized water in the ammonia gas absorption area 21 to the spraying mechanisms 5, as shown in fig. 3, the spraying mechanisms 5 include horizontal water inlet pipes 51 communicated with the water pump 6, water inlet ends of the water inlet pipes 51 are provided with the ammonia water concentration sensors 53, and water outlet ends are connected to a rotary spraying assembly 52.
As shown in fig. 4, the rotary spraying assembly 52 includes a first sealing housing 521 communicated with the water inlet pipe 51, a turbine blade 522 is horizontally disposed inside the first sealing housing 521, upper and lower ends of the first sealing housing are sealed and rotatably communicated with a second cylindrical sealing housing 525, a vertical rotating shaft 523 is fixedly connected to the center of the turbine blade 522, horizontal connecting rods 524 are respectively disposed at the upper and lower ends of the rotating shaft 523, the connecting rods 524 are fixedly connected with the second sealing housing 525, a plurality of spraying pipes 527 are equally disposed on the circumference of the side wall of the second sealing housing 525, and a fan-shaped nozzle 528 is disposed on one side of the spraying pipe 527 away from the first sealing housing 521.
Preferably, the second sealing housing 525 is rotatably connected to the first sealing housing 521 through a sealing bearing 526, a plurality of fan-shaped nozzles 528 are equidistantly arranged along the length direction of the spray pipe 527, the aperture of the spray holes increases progressively along the direction away from the spray pipe 527, and the fan-shaped nozzles 528 incline towards the inner wall direction of the recovery tank 2, and the inclination angle α is 10 to 80 °, and preferably 30 to 45 °.
The working process and working principle of the embodiment are as follows: the water pump 6 in one-level absorption region and second grade absorption region pumps the demineralized water in this region to the inlet tube 51 of this district's spray mechanism 5 (the water pump 6 in the spare area is in standby state), demineralized water passes through inlet tube 51 and gets into first sealed casing 521, water pressure drive turbine blade 522 is rotatory, turbine blade 522 drives the second sealed casing 525 rotation at both ends from top to bottom, demineralized water flows into two second sealed casings 525 from first sealed casing 521, finally from the fan-shaped nozzle 528 blowout on the shower 527, the shower 527 of top forms the multistage water curtain of upper strata that upwards rotatory sprayed, the shower 527 of below forms the multistage water curtain of lower floor that downwards rotatory sprayed, two-layer rotatory multistage water curtain of upper and lower, can greatly improve the seizure and the absorption rate to the ammonia. The aperture of the spray holes of the fan-shaped nozzles 528 is gradually increased along the direction far away from the spray pipe 527, the water pressure can be adjusted, the desalted water can smoothly flow to one end, far away from the second sealing shell 525, of the spray pipe 527, the fan-shaped nozzles 528 are obliquely arranged towards the direction of the inner wall of the recovery tank 2, the horizontal plane coverage range of the rotary multi-stage water curtain can be increased, and the capture absorption efficiency is further improved.
Example 3
With reference to fig. 1 to 6, this embodiment provides an ammonia water loading ammonia recovery system, on the basis of embodiment 2, each ammonia gas distribution mechanism 7 is arranged below the demineralized water liquid level in the ammonia gas absorption area 21, the ammonia gas distribution mechanism 7 includes a short header pipe 71 and an arc pipe 72 that are horizontally arranged, one end of the short header pipe 71 is communicated with the gas inlet 22, the other end is communicated with the arc pipe 72, a plurality of short branch pipes 73 are arranged in the radial direction of the inner arc surface of the arc pipe 72 at equal intervals, the short branch pipes 73 are communicated with a spiral ligament distribution pipe 75 through a rotary joint 74, and a plurality of gas injection pipes 752 perpendicular to the normal of the spiral edge 751 are respectively arranged on two spiral edges 751 of the spiral ligament distribution pipe 75 at equal intervals. In the above technical solution, the spiral ligament distribution pipe 75 is a hollow structure in the shape of a spiral ligament as shown in fig. 5 and 6, and the structure can automatically rotate under the action of water flow.
The working process and principle of the embodiment are as follows: the tail gas enters the ammonia gas distribution mechanism 7 from the gas inlet 22 of the recovery tank 2, flows out through the short main pipe 71, the arc pipe 72, the short branch pipe 73, the rotary joint 74, the spiral band distribution pipe 75 and the gas jet pipe 752 and reacts with the demineralized water in the ammonia gas absorption area 21, the demineralized water in the ammonia gas absorption area 21 forms circulating water flow under the action of the pump 6 and the spraying mechanism 5, the spiral band distribution pipe 75 is driven to rotate to generate a stirring effect, and the spiral band distribution pipe 75 has a certain stirring effect due to the structural characteristics of the spiral band distribution pipe 75 and can further improve the dispersion effect of the tail gas in the demineralized water by matching with the gas jet pipe 752 on the spiral edge 751 of the spiral band distribution pipe, so that the absorption efficiency is improved.
Example 4
Combine fig. 1 to fig. 7, this embodiment provides an ammonia water loading ammonia recovery system, on embodiment 1, embodiment 2 or embodiment 3's basis, the lateral wall of retrieving jar 2 is equipped with cooling coil 8, cooling coil 8 intercommunication cooling water circulation mechanism 3, cooling water circulation mechanism 3 with retrieve jar 2 and all set up on sled dress seat 4, still be equipped with on sled dress seat 4 and place water pump 6's support 41. The cooling water circulation mechanism 3 in the present technical solution is not limited, and any device capable of providing and pumping cooling water to form cooling water circulation is applicable to the present invention.
Because the reaction of ammonia and water to generate ammonia is an exothermic reaction, when the water temperature in the ammonia absorption area 21 is too high, ammonia water is not generated easily, and the absorption effect of the desalted water on the ammonia is reduced, the cooling coil 8 and the cooling water circulation mechanism 3 are arranged, so that the desalted water in the ammonia absorption area 21 can be cooled in time, the absorption effect of the desalted water on the ammonia is ensured, and the absorption rate is improved; the recovery tank 2 and the cooling water circulation mechanism 3 are both arranged on the skid-mounted seat 4, and can be conveniently moved.
As shown in fig. 1, the bottom of the recovery tank 2 is provided with a cooling water inflow region 26, the top of each ammonia absorption region 21 is provided with a sealed cooling water outflow region 27, the cooling coils 8 have three sections, and surround the demineralized water containing regions of the upper, middle and lower ammonia absorption regions 21 respectively, and are communicated with the cooling water outflow regions 27 in the corresponding ammonia absorption regions 21 respectively, the cooling coil 8 at the lowest section is communicated with the cooling water inflow region 26, and cooling water flows into the cooling water inflow region 26 of the recovery tank 2 from the cooling water circulation mechanism 3, flows into each cooling water outflow region 27 through the cooling coil 8, and finally flows into the cooling water circulation mechanism 3 from the cooling water outflow region 27 at the uppermost part of the recovery tank 2.
In the above technical solution, each ammonia absorption zone 21 has a triple cooling structure, which can greatly improve the cooling effect. For the convenience of further description, the cooling coil 8 is described as a lower-stage coil 81, a middle-stage coil 82 and an upper-stage coil 83 from bottom to top, a cooling water inflow region 26 is arranged below the bottom absorption region 211, a demineralized water region is surrounded by the lower-stage coil 81, and a cooling water outflow region 27 is arranged above the demineralized water region; a cooling water outflow area 27 (namely, the cooling water outflow area 27 at the top of the bottom absorption area 211) is arranged below the middle absorption area 212, the middle section coil 82 is arranged around the demineralized water area, and the cooling water outflow area 27 is arranged above the demineralized water area; the top absorption zone 213 has a cooling water outflow zone 27 below (i.e., the cooling water outflow zone 27 at the top of the middle absorption zone 212), and the demineralized water zone has an upper coil 83 surrounding and a cooling water outflow zone 27 above.
As shown in fig. 7, a cooling water inlet 271 communicated with a section of the cooling coil 8 below is arranged below the side wall of the cooling water outflow region 27, a cooling water outlet 272 communicated with a section of the cooling coil 8 above is arranged above the side wall, the gas outlet 25 is arranged above the side wall on the side opposite to the cooling water inlet 271, a U-shaped corrugated gas collecting pipe 9 is horizontally arranged in the cooling water outflow region 27, and the gas collecting pipe 9 is respectively communicated with the ammonia gas absorption region 21 and the gas outlet 25.
Among the above-mentioned technical scheme, the cooling water in the cooling water outflow region 27 can cool off the gas in the gas collecting pipe 9, the structure of U type corrugate can increase the cooling area of gas collecting pipe 9, the multistage water curtain in upper strata that sprays mechanism 5 can spray part demineralized water in the bottom of cooling water outflow region 27, make the demineralized water obtain further cooling, there is part demineralized water to spout into in the gas collecting pipe 9 simultaneously, further seizure is carried out to the ammonia in the gas collecting pipe 9, because the gas collecting pipe 9 is the U type corrugate, this part demineralized water finally carries some ammonia (the aqueous ammonia that generates) to flow back to the demineralized water region of ammonia absorbing area 21 under the effect of gravity.
The gas collecting pipe 9 is internally provided with a U-shaped corrugated cold water pipe 91 corresponding to the gas collecting pipe 9, the bottom of the gas collecting pipe 9 is provided with a gas guide pipe 92 communicated with the ammonia gas absorption area 21 in a sealing manner, one end of the cold water pipe 91 penetrates through the gas collecting pipe 9 in a sealing manner and is communicated with the cooling water inlet 271 in a sealing manner, the other end of the cold water pipe is close to the gas outlet 25 and penetrates through the gas collecting pipe 9 in a sealing manner and is communicated with the cooling water outlet area 27, and the gas guide pipes 92 are respectively arranged at the lowest points of U-shaped corrugations of the gas collecting pipe 9.
The working process and principle of the embodiment are as follows: the cooling water in the cooling water circulation mechanism 3 enters the cooling water inflow region 26 through the water inlet below the side wall of the cooling water inflow region 26, flows into the lower coil 81 surrounding the bottom absorption region 211 through the water outlet above the side wall of the cooling water inflow region 26, flows into the cold water pipe 91 above the bottom absorption region 211 through the lower coil 81, flows into the cooling water outflow region 27 above the bottom absorption region 211 through the cold water pipe 91, flows into the middle coil 82 surrounding the middle absorption region 212 through the cooling water outlet 272 above the cooling water outflow region 27, flows into the cold water pipe 91 above the middle absorption region 212 through the middle coil 82, flows into the cooling water outflow region 27 above the middle absorption region 212 through the cold water pipe 91, flows into the upper coil 83 surrounding the top absorption region 213 through the cooling water outlet 272 above the cooling water outflow region 27, and flows into the cooling water pipe 91 above the top absorption region 213 through the upper coil 83, flows into the cooling water outflow region 27 above the top absorbing region 213 through the cooling water pipe 91, and flows into the cooling water circulation mechanism 3 through the cooling water outlet 272 above the cooling water outflow region 27. In tail gas got into gas collecting pipe 9 from ammonia absorption zone 21, formed sealed annular space between cold water pipe 91 and the gas collecting pipe 9, tail gas received the dual cooling effect of cold water pipe 91 and cooling water play district 27 in this annular space, has increased substantially the cooling effect, changes to be spouted into the demineralized water absorption in the gas collecting pipe 9, and remaining tail gas flows out from gas outlet 25.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (10)
1. An ammonia water loading ammonia gas recovery system comprises a recovery tank (2) connected with an exhaust port (12) of an ammonia water tank truck (1), and is characterized in that the inner cavity of the recovery tank (2) sequentially comprises three independent ammonia gas absorption areas (21) from bottom to top, the three ammonia gas absorption areas (21) are respectively provided with an ammonia water concentration sensor (53) and demineralized water, one of the three ammonia gas absorption areas (21) is used as a primary absorption area, the other one is used as a secondary absorption area, tail gas passes through the primary absorption area and the secondary absorption area from the exhaust port (12) in sequence and then is discharged into air, ammonia gas in the tail gas reacts with the demineralized water to generate ammonia water, when the ammonia water concentration in the primary absorption area reaches a target value, the primary absorption area is switched into a standby area, the demineralized water is introduced after the ammonia water is discharged for standby, and meanwhile, the secondary absorption area is switched into the primary absorption area, the standby area is switched into a secondary absorption area to form dynamic and continuous ammonia recovery.
2. The ammonia gas recovery system for loading ammonia water into a vehicle according to claim 1, wherein a gas inlet (22), a desalted water inlet (23) and an ammonia water outlet (24) are arranged below the side wall of each ammonia gas absorption zone (21), a gas outlet (25) is arranged above the side wall, the gas inlet (22) is communicated with a main gas inlet pipe through a branch gas inlet pipe, the main gas inlet pipe is communicated with a gas outlet (12), an electric valve is arranged on the branch gas inlet pipe, the desalted water inlet (23) is connected with a desalted water supply mechanism through a desalted water pipe, an electric valve is arranged on the desalted water pipe, the ammonia water outlet (24) is connected with an ammonia water storage device through an ammonia water pipe, an electric valve is arranged on the ammonia water pipe, a three-way pipe is connected with the gas outlet (25), two electric valves are arranged on the three-way pipe, and the two electric valves can be selectively communicated with the branch gas inlet pipe or atmosphere of the secondary absorption zone, and the ammonia water concentration sensor (53) and each electric valve are connected with a PLC controller.
3. An ammonia water loading ammonia gas recovery system according to claim 2, wherein the spraying mechanism (5) is arranged above the liquid level of the demineralized water in the ammonia gas absorption zone (21), the water pump (6) pumps the demineralized water in the ammonia gas absorption zone (21) to the spraying mechanism (5), the spraying mechanism (5) comprises a horizontal water inlet pipe (51) communicated with the water pump (6), the water inlet end of the water inlet pipe (51) is provided with the ammonia water concentration sensor (53), and the water outlet end is connected with the rotary spraying component (52).
4. An ammonia-loading ammonia gas recovery system according to claim 3, characterized in that said rotary spraying assembly (52) comprises a first sealed housing (521) communicating with said inlet pipe (51),
the inside level of first seal housing (521) is equipped with turbine blade (522), but the sealed columniform second seal housing (525) of rotatable intercommunication in upper and lower both ends, turbine blade (522) center department fixed connection vertical rotating shaft (523), the upper and lower both ends of pivot (523) are equipped with horizontally connecting rod (524) respectively, connecting rod (524) fixed connection second seal housing (525), second seal housing (525) lateral wall circumference equals to be equipped with a plurality of shower (527), shower (527) are kept away from first seal housing (521) one side is equipped with fan-shaped nozzle (528).
5. An ammonia water on-board ammonia gas recovery system according to claim 4, wherein the second sealed housing (525) is rotatably connected with the first sealed housing (521) through a sealed bearing (526), the fan-shaped nozzles (528) are equidistantly arranged along the length direction of the spray pipe (527), the aperture of the spray holes increases progressively along the direction far away from the spray pipe (527), and the fan-shaped nozzles (528) are inclined towards the inner wall of the recovery tank (2) with an inclination angle α of 10-80 °.
6. An ammonia water on-board ammonia gas recovery system according to claim 3, wherein an ammonia gas distribution mechanism (7) is arranged below the liquid level of the desalted water in each ammonia gas absorption zone (21), the ammonia gas distribution mechanism (7) comprises a horizontally arranged short main pipe (71) and an arc pipe (72), one end of the short main pipe (71) is communicated with the gas inlet (22), the other end of the short main pipe is communicated with the arc pipe (72), a plurality of short branch pipes (73) are arranged on the inner arc surface of the arc pipe (72) in a radial equidistant mode, the short branch pipes (73) are communicated with the spiral ligament distribution pipe (75) through a rotary joint (74), and a plurality of gas injection pipes (752) perpendicular to the normal of the spiral edge (751) are respectively arranged on two spiral edges (751) of the spiral ligament distribution pipe (75) in an equidistant mode.
7. An ammonia water loading ammonia gas recovery system according to claim 3, wherein a cooling coil (8) is arranged on the side wall of the recovery tank (2), the cooling coil (8) is communicated with a cooling water circulation mechanism (3), the cooling water circulation mechanism (3) and the recovery tank (2) are both arranged on a skid-mounted seat (4), and a support (41) for placing the water pump (6) is further arranged on the skid-mounted seat (4).
8. An ammonia water loading ammonia gas recovery system according to claim 7, the bottom of the recovery tank (2) is provided with a cooling water inflow area (26), the top of each ammonia gas absorption area (21) is respectively provided with a sealed cooling water outflow area (27), the cooling coil (8) has three sections which are respectively arranged around the demineralized water containing areas of the upper ammonia absorbing area, the middle ammonia absorbing area and the lower ammonia absorbing area (21), and the cooling water outflow areas (27) in the corresponding ammonia gas absorption areas (21) are respectively communicated, the cooling coil (8) at the lowest section is communicated with the cooling water inflow area (26), the cooling water flows into the cooling water inflow area (26) of the recovery tank (2) from the cooling water circulation mechanism (3), flows into each cooling water outflow area (27) through the cooling coil (8), and finally flows into the cooling water circulation mechanism (3) from the cooling water outflow area (27) at the top of the recovery tank (2).
9. An ammonia water loading ammonia gas recovery system according to claim 8, wherein a cooling water inlet (271) communicated with a section of cooling coil (8) below is arranged below the side wall of the cooling water outflow region (27), a cooling water outlet (272) communicated with a section of cooling coil (8) above is arranged above the side wall, the gas outlet (25) is arranged above the side wall on the side opposite to the cooling water inlet (271), a U-shaped corrugated gas collecting pipe (9) is horizontally arranged in the cooling water outflow region (27), and the gas collecting pipe (9) is respectively communicated with the ammonia gas absorption region (21) and the gas outlet (25).
10. An ammonia water on-board ammonia gas recovery system as claimed in claim 9, wherein the gas collecting pipe (9) is internally provided with a U-shaped corrugated cold water pipe (91) corresponding to the gas collecting pipe (9), the bottom of the gas collecting pipe is provided with a gas guide pipe (92) hermetically communicated with the ammonia gas absorption area (21), one end of the cold water pipe (91) hermetically penetrates through the gas collecting pipe (9) and is hermetically communicated with the cooling water inlet (271), the other end of the cold water pipe hermetically penetrates through the gas collecting pipe (9) near the gas outlet (25) and is communicated with the cooling water outflow area (27), and the gas guide pipes (92) are respectively arranged at the lowest points of the U-shaped corrugations of the gas collecting pipe (9).
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