CN207769506U - A kind of hypergravity ammonia removal device - Google Patents

Abstract

The utility model discloses a kind of hypergravity ammonia removal devices, including babinet, fire-proof motor, liquid circulation loop and gas circulation loop.The hypergravity ammonia removal device of the utility model, liquid film is formed by plastic wire using powerful centrifugal force caused by high speed rotation and increases contact area, so that gas-liquid speed of related movement increases, alternate contact interface product is greatly increased and is updated rapidly, so that mass-transfer efficiency improves 13 orders of magnitude than spray tower, to which ammonia can more fully be dissolved in water.Water circulation use, reduces the energy consumption of water, while improving the recovery utilization rate of ammonia, and small with device volume, and simple in structure, the residence time is short, microcosmic to be uniformly mixed, and mass-transfer efficiency is high, investment and the low feature of operating cost.

Description

A kind of hypergravity ammonia removal device

Technical field

The utility model is related to a kind of hypergravity ammonia removal devices, are a kind of ammonia decontamination processing units, belong to industrial treatment The technical field of ammonia equipment.

Background technology

Ammonia is a kind of hydronitrogen, is toxic gas that is a kind of colourless but having intense irritation smell, easily molten Yu Shui, 1 volume of water can dissolve 700 volume ammonias, and Yi Yushui occurs chemical reaction and generates a hydration when ammonia is dissolved in water Ammonia.The boiling point of ammonia is -33.5 degrees Celsius, is easily liquefied, this characteristic is industrially usually used, using ammonia as refrigeration working medium.Ammonia Due to containing nitrogen in gas, it is widely used in soda ash, nitric acid, ammonium salt and chemical fertilizer processed etc..

The ammonia explosion limit is 15.7~27.4%, and fire risk belongs to 2 articles of Class B.Therefore, ammonia and sky Gas or oxygen mix can form explosive mixture.Ammonia can invade moist skin, mucous membrane and eyes, can cause deep coughs, branch Tracheospasm, acute pulmonary edema, or even blindness and death by suffocation can be caused.Current ammonia decontamination technology both domestic and external mainly has： Chemical absorbing, catalytic decomposition are catalyzed aerobic breakdown, biodegradable, Physical Absorption, but have its limitation.

Ammonia chemical absorbing is so that ammonia is reacted with acidic materials using the alkalinity of ammonia and then generate low value-added nitrogenous fertilizer, The method recovered solvent volatility is big, and corrosivity is strong, not disposable, and cannot recycle gaseous ammonia, causes resource Waste.

Ammonia catalytic decomposition technology be ammonia is thoroughly decomposed into nitrogen and hydrogen under the effect of the catalyst, but presently, there are The shortcomings that be, the decomposition of ammonia need to carry out at high temperature.When temperature be less than 900 DEG C when, easily occur catalyst sulfur poisoning or Phenomena such as generating ammonium salt blockage catalyst, but when temperature is more than 1200 DEG C, then Catalyst Steam can be made to press through high and accelerate to urge The loss of agent directly affects the service life of catalyst.Ammonia decomposition reaction thermal discharge is big, is not easily recycled utilization, ammonia is caused to urge Change and decompose energy consumption height, operating cost is high, is not suitable in industrial production.

It is that ammonia is catalytically conveted to nitrogen and water under conditions of aerobic that ammonia, which is catalyzed aerobic breakdown technology, and decomposition reaction exists 300 DEG C can be carried out, and completely eliminate the harm of ammonia, while also not generate secondary pollution.But the ammonia of method processing is dense It spends relatively low, is not suitable for the processing of higher concentration ammonia, otherwise need to improve temperature, not only increase energy consumption, and it can be promoted The generation of his nitrogen ammoniate.The research of catalytic active component is concentrated mainly on noble metal and mistake in the aerobic breakdown of ammonia catalysis at present It crosses on metal oxide, noble metal catalyst generally there is higher catalytic activity, reaction temperature to exist ammonia catalysis aerobic breakdown 250 DEG C to 400 DEG C, but noble metal catalyst is poor to the selectivity of nitrogen, and be catalyzed aerobic breakdown and often there is side reaction, it is raw At nitric oxide, secondary pollution is caused, while noble metal catalyst is generally more expensive, limits its application.Transiting metal oxidation Object catalyst has higher nitrogen selective with respect to noble metal catalyst, and cheap, but metal oxide oxidation catalyst activity Not high, reaction temperature is higher.Therefore, either single supported precious metal catalyst or single carrying transition metal oxide catalyst Agent cannot all meet many requirements in industrial production to catalyst simultaneously.

Biological degradation method is the aerobic-anaerobic process using microorganism, converts ammonia to the nutrient source of microorganism to reach To the purpose of purification air, but in industrial production, the ammonia of required purification is large-minded, and ammonia has toxic, and biological Degradation treatment technology is not met by the demand in industrial production in the resistance to poison of biological inoculum and degradation efficiency.

The Physical Absorption of ammonia is the most common technology of ammonia removal, and the characteristic of water is highly soluble in using ammonia, with soft water or Weak aqua ammonia is that absorbent absorbs ammonia, and obtaining low concentration ammonium hydroxide, then further distillation obtains concentrated ammonia liquor, and rectifying is concentrated ammonia liquor, then Pressurized, liquefied ammonia use is made in condensation.In traditional chemical technique, absorption operation is a kind of important separation method, influences it The factor of absorption is mainly the solubility of ammonia in water, and absorption efficiency depends mainly on gas phase or liquid phase and ammonia on interface Concentration difference and diffuser efficiency from gas phase to liquid phase that transmitted from of ammonia.This technique is disadvantageous in that ammonia is anti-with water A large amount of heat should be released in the process, cause temperature drastically to increase, ammonia is prevented to be dissolved in water so that liquid phase water is easy to tend to be saturated State, therefore, it is necessary to consume a large amount of water.And the recovery utilization rate of ammonia is not high, and a large amount of weak aqua ammonias are generated in absorption process must It must could be applied by being concentrated by heating into 20% ammonium hydroxide, cost recovery is high, consumes big energy.

《Henan chemical industry》In《Spray column tail gas removes the experimental study of ammonia》Paper by spray absorber, with Ammonia, air, dilute nitric acid solution are experiment object system, have investigated sprinkle density, empty tower gas velocity, entrance ammonia density, absorbing liquid respectively The influence of pH value and liquid phase temperature to ammonia absorptivity.Absorbent is delivered to absorption through circulating pump with certain flow in experiment flow Column overhead, and be uniformly distributed into after droplet by liquid distributing board and gas is sprayed, the heat transfer of gas-liquid two-phase counter current contacting Mass transfer, gas phase empty after tower top cyclone defroster.The spray of this device is uniformly distributed into droplet by liquid distributing board, compared to Extensive packed tower, simple in structure, low energy consumption.But its gas liquid interfacial area is small, and absorbing the liquid phase after ammonia cannot timely update, Mass-transfer efficiency is low.

《Chemical intermediate》Middle publication《The research of ammonia in rotary packed bed absorption phosphate tail gas》Describe it is a kind of with Acid waste water is absorbing liquid, using the rotary packed bed reality for replacing traditional tower, being carried out to the ammonia in removing phosphate tail gas It tests.This experiment absorbs ammonia using acid, not equilibrium limited because sour absorption efficiency is higher.But ammonia absorption efficiency mainly takes Acid content certainly in acid waste water, if acid amount is insufficient, absorption process translates into absorption process of the water to ammonia, limits Assimilation effect of the acid to it.And in the deamination experiment carried out to its tail gas, which is suitable for the suction of reaction of quick and moment Receipts process, there are certain risks.It is directly sprayed onto rotation filler inner edge when waste water is passed through liquid distribution trough, reacts contact surface Product is small, and gas-liquid speed of related movement is low, and absorption efficiency is low, and when design is also required to overcome the problems, such as that gas-liquid is unevenly distributed in tower.

Invention content

The purpose of this utility model primarily directed to using ammonia as refrigeration working medium freezer and the ammonias such as chemical fertilizer factory assemble Place be to avoid that ammonia is revealed and ammonia explosion accident, design provide a kind of ammonia decontamination processing unit, arranged with existing prevention It applies and compares, present apparatus energy consumption is low, small, simple in structure, reliable for operation, easy to operate, and purification efficiency is high, does not generate secondary dirt Dye, product can continue with.

In order to achieve the above objectives, the utility model realizes that purpose is adopted the technical scheme that：

A kind of hypergravity ammonia removal device, including babinet, fire-proof motor, liquid circulation loop and gas circulation loop, institute State liquid circulation loop include the water outlet being located on the babinet and the 4th regulating valve being sequentially connected to the water outlet, Water pump, heat exchanger and spray head, the gas circulation loop include sequentially being connected to wind turbine, the first regulating valve, being located at the babinet The air inlet of side, the gas outlet for being located at the babinet other side and ammonia concentration detection device, the ammonia concentration detection The outlet of equipment is also connected to by the pipeline equipped with the 5th regulating valve with the inlet scoop of the wind turbine, and the ammonia concentration detection is set Standby outlet is additionally provided with the 6th regulating valve and leads directly to air, and the spray head is arranged at the top of the box inside, the spray The lower section for drenching head is equipped with plastic wire, and the bottom of box is equipped with water inlet and discharge outlet, and the water inlet is equipped with the second adjusting Valve, the discharge outlet are sequentially installed with ammonia concn and equipment and third regulating valve, the middle part of the plastic wire are examined to be equipped with rotation The rotation drive shaft of drive shaft, the fire-proof motor and the plastic wire is sequentially connected.

Further, in order to avoid superpressure in babinet, ensure safety, the safety valve is additionally provided at the top of the babinet.

Further, the air inlet and the gas outlet with the plastic wire be with reference to diagonal setting, the gas outlet with The angle of horizontal plane is 0 °~60 °.Optimize the path of gas flowing, when increasing gas with the contact with liquid in the babinet Between improve absorption efficiency.

Further, the mesh number of the plastic wire is 10~500 mesh, can the surface area of liquid be increased to rational area Between, not only avoided ammonia from absorbing slow, but also avoid the too fast waste power of liquid flowing speed.

Further, the rotating speed of the fire-proof motor is 200~400r/min, and rational rotary speed can improve ammonia Purification efficiency.

Further, the spray head fills for shower, and hole density is 5~15PPI, thus on the plastic wire preferably Form liquid film.

A kind of ammonia-removal method of hypergravity ammonia removal device of the utility model, includes the following steps：

1, it opens second regulating valve and soft water is injected into the babinet by the water inlet；

2, when water reaches institute's water requirement, water filling height and higher than the water outlet and less than the gas outlet will avoid The water pump is emptied, and closes second regulating valve；

3, the inlet scoop of wind turbine described in the pipeline connection containing ammonia purified will be needed or be placed in the wind turbine to contain Have in the environment of ammonia；

4, the 4th regulating valve, the water pump, the heat exchanger and the fire-proof motor, the water in the babinet are opened Under the action of the water pump, is sprayed into the spray head through the heat exchanger and form liquid film on the plastic wire；

5, open the wind turbine and first regulating valve, gas under the action of the wind turbine by the air inlet into Enter the babinet, wherein most ammonias are absorbed by the liquid film on the plastic wire, forms ammonium hydroxide and flow under the effect of gravity The bottom of box；

6 then gas be discharged into the ammonia concentration detection device from the gas outlet, through the ammonia concentration detect Equipment detects, if ammonia in gas gas concentration is higher than limit value, opens the 5th regulating valve, gas is passed through the wind turbine again It is secondary to be purified into the babinet, if ammonia in gas gas concentration is less than limit value, opens the 6th regulating valve and be discharged into Air.

Further, the speed of ammonia is removed by controlling the opening adjustment of first regulating valve.

Further, the circulation rate that liquid is adjusted by adjusting the 4th regulating valve, so as to adjust except ammonia speed and effect Fruit.

Further, the ammonia concn detection device monitors the ammonia density of liquid in the babinet in real time, as liquid follows Ring number increases, and after ammonia density reaches limit value, the ammonia concn detection device controls the third regulating valve and opens, will Liquid discharge recycling in the babinet.

The utility model has the following advantages compared with prior art：

Hypergravity ammonia removal device provided by the utility model generates hundreds of times of gravity (hypergravity) using high speed rotation Centrifugal force field forms nano level liquid film by plastic wire and carries out ammonia absorption.

Existing ammonia removal equipment main body is typically various absorption towers, based on plate column and packed tower, separately there is spray-type absorption Device, surface absorber and the other kinds of absorber such as mix absorber.The present apparatus is formed by super gravity field on plastic wire Liquid film increases contact area so that gas-liquid speed of related movement increases, and alternate contact interface product is greatly increased and updated rapidly, micro- It sees and is uniformly mixed so that the mass-transfer efficiency ratio spray tower 1-3 order of magnitude of raising, and the 1/10 of the insufficient the latter of its volume, To which ammonia can more fully be dissolved in water.Water circulation use, reduces the energy consumption of water, while improving the recycling of ammonia Rate.

Packed tower empty tower gas velocity is usually 0.5~1.2m/s, and gas velocity crosses conference and forms liquid flooding.In the present apparatus, water due to by It is acted on to larger super gravity field, flow velocity is much bigger more than in tower, can control higher gas flow rate, high-gravity rotating bed Flooding point be apparently higher than packed tower, plate column and common absorber, thus gas-liquid contact is generally not susceptible to liquid flooding, handles gas Bigger is measured, the operational unstability that the fluctuation of solution-air parameter may be brought is suitable for.

Description of the drawings

Fig. 1 is the principle schematic diagram of the utility model embodiment；

In figure：1 be wind turbine, 2 be the first regulating valve, 3 be bevel gear, 4 be spray head, 5 be safety valve, 6 be fire-proof motor, 7 be water pump, 8 be babinet, 9 be the second regulating valve, 10 be third regulating valve, 11 be the 4th regulating valve, 12 be plastic wire, 13 for into Gas port, 14 be water outlet, 15 be ammonia concentration detection device, 16 be gas outlet, 17 be water inlet, 18 be discharge outlet, 19 be ammonia Water concentration examine equipment, 20 be the 5th regulating valve, 21 be the 6th regulating valve, 22 be heat exchanger.

Specific implementation mode

It is understandable to enable the above objects, features, and advantages of the utility model to become apparent, below in conjunction with the accompanying drawings to this The specific embodiment of utility model is described in detail.

As shown in Figure 1：It is followed for a kind of hypergravity ammonia removal device of the utility model, including babinet 8, fire-proof motor 6, liquid Loop back path and gas circulation loop, the liquid circulation loop include the water outlet 14 being located on the babinet 8 and with institute The 4th regulating valve 11, water pump 7, heat exchanger 22 and spray head 4 that water outlet 14 is sequentially connected to are stated, the gas circulation loop includes It is sequentially connected to wind turbine 1, the first regulating valve 2, the air inlet 13 for being located at 8 side of the babinet, is located at going out for 8 other side of the babinet Gas port 16 and ammonia concentration detection device 15, the outlet of the ammonia concentration detection device 15 is also by being equipped with the 5th regulating valve 20 pipeline is connected to the inlet scoop of the wind turbine 1, and the outlet of the ammonia concentration detection device 15 is additionally provided with the described 6th and adjusts Section valve 21 leads directly to air, and the setting of the spray head 4 is equipped with plastic wire in 8 inside top of the babinet, the lower section of the spray head 4 12,8 bottom of the babinet is equipped with water inlet 17 and discharge outlet 18, and the water inlet 17 is equipped with the second regulating valve 9, the draining Mouth 18 is sequentially installed with ammonia concn and equipment 19 and third regulating valve 10, the middle part of the plastic wire 12 is examined to be equipped with rotation and drive Axis, the fire-proof motor 6 and the rotation drive shaft of the plastic wire 12 are sequentially connected.

The top of the babinet 8 is additionally provided with the safety valve 5.

Fire-proof motor 6 described in the utility model embodiment is arranged horizontally in outside the babinet 8, and by bevel gear 3 with The rotation drive shaft of the plastic wire 12 is sequentially connected, and the air inlet 13 and the gas outlet 16 are with the plastic wire 12 For with reference to diagonal setting, the gas outlet 16 and the angle of horizontal plane are 30 °, the mesh number of the plastic wire 12 is 300 mesh, described The rotating speed of fire-proof motor 6 is 300r/min, and the spray head 4 fills for shower, hole density 10PPI.

Certainly, the fire-proof motor 6 can also use other arrangements, the angle of the gas outlet 16 and horizontal plane Can be 0 °~60 ° of other angles, the mesh number of the plastic wire 12 can be 10~500 mesh, and the rotating speed of the fire-proof motor 6 can Think that 200~400r/min, the spray head 4 fill for shower, hole density can be 5~15PPI.

A kind of ammonia-removal method of hypergravity ammonia removal device of the utility model, includes the following steps：

The first step：It opens second regulating valve 9 and soft water is injected into the babinet 8 by the water inlet 17；

Second step：When water reaches institute's water requirement, water filling height is higher than the water outlet 14 and is less than the gas outlet 16 and the water pump 7 to be avoided to be emptied, close second regulating valve 9；

Third walks：It will need the inlet scoop of wind turbine 1 described in the pipeline connection containing ammonia that purifies or by the wind turbine 1 It is placed in the environment containing ammonia；

4th step：Open the 4th regulating valve 11, the water pump 7, the heat exchanger 22 and the fire-proof motor 6, institute The water in babinet 8 is stated under the action of the water pump 7, entering the spray head 4 through the heat exchanger 22 is sprayed in the modeling Liquid film is formed on material net 12；

5th step：The wind turbine 1 and first regulating valve 2 are opened, gas is under the action of the wind turbine 1 by described Air inlet 13 enters the babinet 8, wherein most ammonias are absorbed by the liquid film on the plastic wire 12, forms ammonium hydroxide in weight 8 bottom of the babinet is flowed under force effect；

6th step：Then gas is discharged into the ammonia concentration detection device 15 from the gas outlet 16, through the ammonia Gas concentration detection device 15 detects, if ammonia in gas gas concentration is higher than limit value, opens the 5th regulating valve 20, gas It is passed through the wind turbine 1 and is again introduced into the babinet 8 and purified, if ammonia in gas gas concentration is less than limit value, open institute It states the 6th regulating valve 21 and is discharged into air；

The speed of ammonia can be removed by controlling the opening adjustment of first regulating valve 2.

The circulation rate that liquid can be adjusted by adjusting the 4th regulating valve 11, so as to adjust except ammonia speed and effect Fruit.

The ammonia concn detection device 19 monitors the ammonia density concentration of liquid in the babinet 8 in real time, as liquid follows Ring number increases, and after ammonia density reaches limit value, the ammonia concn detection device 19 controls the third regulating valve 10 and opens It opens, recycling is discharged in the liquid in the babinet 8.

Although the utility model discloses as above, the utility model is not limited to this.Any those skilled in the art, It does not depart from the spirit and scope of the utility model, can make various changes or modifications, therefore the scope of protection of the utility model It should be subject to claim limited range.

Claims (6)

1. a kind of hypergravity ammonia removal device, it is characterised in that：Including babinet (8), fire-proof motor (6), liquid circulation loop and Gas circulation loop, the liquid circulation loop include be arranged water outlet (14) on the babinet (8) and with it is described go out The 4th regulating valve (11), water pump (7), heat exchanger (22) and the spray head (4) that the mouth of a river (14) is connected in order, the gas circulation Circuit include in order connection wind turbine (1), the first regulating valve (2), setting the babinet (8) side air inlet (13), set The gas outlet (16) in the babinet (8) other side and ammonia concentration detection device (15) are set, the ammonia concentration detection is set The outlet of standby (15) is also connected to by being equipped with the pipeline of the 5th regulating valve (20) with the inlet scoop of the wind turbine (1), the ammonia The outlet of concentration detection device (15) is additionally provided with the 6th regulating valve (21) and leads directly to air, and the spray head (4) is arranged in the case Top in body (8) is provided with plastic wire (12) below the spray head (4), and babinet (8) bottom is provided with water inlet (17) and discharge outlet (18), the water inlet (17) are equipped with the second regulating valve (9), and the discharge outlet (18) is sequentially installed with ammonia Water concentration examines equipment (19) and third regulating valve (10), and rotation drive shaft is provided in the middle part of the plastic wire (12), described Fire-proof motor (6) and the rotation drive shaft of the plastic wire (12) are sequentially connected.

2. a kind of hypergravity ammonia removal device according to claim 1, it is characterised in that：The top of the babinet (8) is also set There is safety valve (5).

3. a kind of hypergravity ammonia removal device according to claim 1, it is characterised in that：The air inlet (13) and it is described go out Gas port (16) is with reference to diagonal setting with the plastic wire (12), and the gas outlet (16) and the angle of horizontal plane are 0 °~60 °.

4. a kind of hypergravity ammonia removal device according to claim 1, it is characterised in that：The mesh number of the plastic wire (12) is 10~500 mesh.

5. a kind of hypergravity ammonia removal device according to claim 1, it is characterised in that：The rotating speed of the fire-proof motor (6) For 200~400r/min.

6. a kind of hypergravity ammonia removal device according to claim 1, it is characterised in that：The spray head (4) fills for shower, Its hole density is 5~15PPI.