Ammonia gas recovery device used in ammonia gas detection process

Abstract

The utility model relates to an ammonia gas recovery device used in an ammonia gas detection process, which comprises an ammonia water tank, an exhaust pipe is arranged at the top of the ammonia water tank, a honeycomb exhaust port is arranged at the top of the exhaust pipe, the exhaust pipe is connected with the ammonia water tank through a first flange interface, and a second flange interface is arranged at the top of the ammonia water tank. The second flange connector is used for being connected with a gas injection pipeline. A liquid level meter is arranged at the upper part outside the ammonia water tank, a flow control valve is arranged at the lower part outside the ammonia water tank, a liftable graduated tube is arranged in the ammonia water tank, and a water storage tank cover is arranged at the top of the ammonia water tank. During use, when ammonia gas needs to be recycled, the second flange connector is connected with the gas injection pipe, mixed gas containing ammonia gas enters the ammonia water tank and is fully combined with water in the ammonia water tank to be absorbed by the water, a very small amount of ammonia which is not absorbed enters the exhaust pipe, the honeycomb-shaped exhaust port is formed in the top end of the exhaust pipe, and a purifying agent is contained in the exhaust pipe. And a very small amount of unreduced ammonia gas is discharged into high-altitude air through the exhaust pipe, so that the recovery of the ammonia gas tail gas is further enhanced, the whole process is efficient and safe, and the ammonia gas recovery rate is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ship closed cabin tightness detection, specifically a kind of ammonia recovery device for ammonia detection process, more particularly to utilize ammonia as tracer gas and carry out the device of nitrogen dilution recovery in closed cabin tightness detection process. BACKGROUND

[0002] In prior art, when LNG ship, storage tank main film defect detection, certain concentration of ammonia is injected into closed space, ammonia is used as tracer gas, ammonia color paint is sprayed on the surface of main film weld, when the defect of leakage point appears on the surface of main film, ammonia color paint will change color, so that the defect position is found.

[0003] When operating, closed space needs to be connected with external device, for internal gas circulation, gas containing certain concentration of nitrogen is discharged. When detecting is finished and gas is discharged, ammonia concentration is high, which can increase environmental pollution risk, cause safety hazard of on-site staff, and affect safety production. The existing ammonia treatment mode is often high in cost, complex in equipment, difficult to operate, and also has the problems of low ammonia recovery efficiency, sometimes ammonia escapes in recovery process, and causes certain influence on environment.

[0004] Therefore, how to effectively treat and discharge mixed ammonia after detection becomes a thorny problem, and an ammonia recovery device that can effectively recover ammonia and safely treat and discharge ammonia is urgently needed. SUMMARY

[0005] The utility model discloses an improved ammonia recovery device in ammonia detection process, which overcomes the deficiencies in the prior art, controls ammonia recovery and escape during ammonia detection, improves the efficiency of ammonia recovery, and ensures the operation safety during tightness detection.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: an ammonia recovery device for ammonia detection process, characterized by: the ammonia recovery device comprises an ammonia water tank, an exhaust pipe is arranged on the top of the ammonia water tank, a honeycomb exhaust port is arranged on the top of the exhaust pipe, the exhaust pipe is connected with the ammonia water tank through a first flange interface, a second flange interface is arranged on the top of the ammonia water tank, and the second flange interface is used to connect with a gas injection pipeline; a liquid level meter is arranged on the outer side of the ammonia water tank, a flow control valve is arranged on the lower part of the outer side, a scale tube that can be lifted is arranged in the ammonia water tank, and a water storage tank cover is arranged on the top of the ammonia water tank.

[0007] Preferably, the exhaust pipe is connected with the ammonia water tank vertically, the top of the exhaust pipe is provided with a honeycomb exhaust port, and a purifying agent is arranged in the exhaust pipe.

[0008] Further, the exhaust pipe is fixed on the top of the ammonia water tank by a plurality of cables, and the height of the exhaust pipe is 4-7 times of the height of the ammonia water tank.

[0009] Further, the top of the ammonia water tank is provided with a scale tube lifting hole matched with the diameter of the scale tube, one end of the scale tube is connected with the top of the ammonia water tank through a hoop, the scale tube can be lifted along the scale tube lifting hole, and the top of the ammonia water tank is provided with a plurality of lifting lugs symmetrically arranged around.

[0010] Further, the range of the scale tube is 1-500mm, and the range of the liquid level meter is 0-500mm.

[0011] Compared with the prior art, the technical scheme of the utility model not only has the improvement of the overall technical scheme, but also has the improvement of many details, and specifically has the following beneficial effects:

[0012] 1、The improved scheme, the ammonia gas recovery device includes the ammonia water tank, the top of the ammonia water tank is provided with the exhaust pipe, the exhaust pipe is connected with the ammonia water tank through the first flange interface, the top of the ammonia water tank is provided with the second flange interface, the second flange interface is used to be connected with the gas injection pipeline, the mixed gas containing ammonia gas in the gas injection pipe enters the ammonia gas tank, is absorbed by water after being fully combined with water, and a small amount of ammonia gas not absorbed is discharged into high-altitude air after catalytic reduction through the exhaust pipe, so that ammonia gas escape in the detection site is controlled, and the ammonia gas recovery effect is good.

[0013] 2、The technical scheme of the utility model, the outside upper portion of the ammonia water tank is provided with a liquid level meter, the outside lower portion is provided with a flow control valve, the ammonia water tank is provided with a lifting scale tube, and the top of the ammonia water tank is provided with a water storage tank cover.

[0014] 3、The structure of the utility model, the exhaust pipe is connected with the ammonia water tank vertically, the top of the exhaust pipe is provided with a honeycomb exhaust port, and the exhaust pipe is provided with a purifying agent.

[0015] 4、The utility model has the advantages of simple structure, reasonable layout, convenient operation, low cost, and is convenient to popularize and utilize. DRAWINGS

[0016] Figure 1 It is a structural schematic view of an embodiment of the utility model.

[0017] Figure 2 It is a structural schematic view of the honeycomb exhaust port of the utility model.

[0018] Figure 3 Figure 1 is a structural schematic diagram of the water storage tank cover of the present application.

[0019] Reference signs:

[0020] 1 liquid level meter, 2 first flange interface, 3 cable, 4 exhaust pipe, 5 water storage tank cover, 6 second flange interface, 7 lifting lug, 8 graduated tube, 9 flow control valve, 10 honeycomb exhaust port, 11 ammonia water tank. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] The present application provides an ammonia recovery device used in ammonia detection process, and specifically refers to Figure 1 The difference between the present application and the prior art is that the ammonia recovery device comprises an ammonia water tank 11, the top of the ammonia water tank is provided with an exhaust pipe 4, the exhaust pipe is connected with the ammonia water tank through a first flange interface 2, the top of the ammonia water tank is provided with a second flange interface 6, and the second flange interface 6 is used to be connected with a gas injection pipeline; the outer side of the ammonia water tank is provided with a liquid level meter 1 at the upper part, and is provided with a flow control valve 9 at the lower part, the ammonia water tank is provided with a liftable graduated tube 8, and the top of the ammonia water tank is provided with a water storage tank cover 5.

[0023] When ammonia recovery is needed, the second flange interface is connected with the gas injection pipeline, the mixed gas containing ammonia gas enters the ammonia water tank along the pipeline, is fully combined with the water in the ammonia water tank and is absorbed by the water, a small amount of ammonia not absorbed enters the exhaust pipe, the top end of the exhaust pipe is provided with a honeycomb-shaped exhaust port, and is provided with a purifying agent inside, so that a small amount of ammonia gas not recovered in the ammonia water tank is catalyzed and reduced into non-toxic ammonia gas and oxygen, a small amount of ammonia gas not reduced is discharged into high-altitude air through the exhaust pipe, the recovery of ammonia tail gas is further strengthened, the whole process is efficient and safe, and the ammonia recovery rate is high.

[0024] Meanwhile, the setting of the graduated tube and the liquid level meter makes the present application have a pressure protection function, the pressure change in the closed space can be understood by observing the liquid level change of the graduated tube, so that the safety during use is ensured.

[0025] Embodiment 1

[0026] In this embodiment, the ammonia recovery device comprises an ammonia water tank 11, the top of the ammonia water tank is provided with an exhaust pipe 4, the top of the exhaust pipe is provided with a honeycomb exhaust port, the exhaust pipe is connected with the ammonia water tank through a first flange interface 2, the top of the ammonia water tank is provided with a second flange interface 6, the second flange interface is used to be connected with a gas injection pipeline, mixed gas containing ammonia water is injected into the ammonia water tank through the gas injection pipeline to carry out effective reaction, most of the ammonia gas is absorbed, and the remaining small amount of ammonia gas is discharged to high altitude after treatment through the exhaust pipe; the outer side upper portion of the ammonia water tank is provided with a liquid level meter 1, the outer side lower portion is provided with a flow control valve 9, the ammonia water tank is provided with a liftable graduated tube 8, the top of the ammonia water tank is provided with a water storage tank cover 5, the water storage tank cover is square, and is provided with anti-skid threads around. The liquid level height in the ammonia water tank can be observed through the observation window in front of the graduated tube, the lift of the graduated tube, the liquid level condition of the liquid level meter on the side wall of the ammonia water tank, and the pressure condition in the sealed space, so that the pressure in the sealed space can be known, and the safety in use is ensured.

[0027] Further, the exhaust pipe in the embodiment is vertically connected with the ammonia water tank, the top of the exhaust pipe is provided with a honeycomb exhaust port, and the exhaust pipe is provided with a purifying agent. Specifically, an activated carbon and silica gel mixture purifying agent can be used, and the purifying machine is a prior art, which will not be described in detail. The exhaust pipe is fixed on the top of the ammonia water tank through a plurality of cables, the height of the exhaust pipe is 4-7 times the height of the ammonia water tank, and the preferred height is 5-6 times. The top of the ammonia water tank is provided with a graduated tube lifting hole matched with the diameter of the graduated tube, one end of the graduated tube is connected with the top of the ammonia water tank through a hoop, the graduated tube can be lifted along the graduated tube lifting hole, the side wall of the graduated tube lifting hole is provided with a sealing ring, so that the entire ammonia water tank still maintains sealing during the lifting of the graduated tube, and the top of the ammonia water tank is provided with symmetrically arranged lifting lugs around, so that the entire ammonia recovery device can be conveniently hoisted and moved, and the use is convenient. Further, the range of the graduated tube is 1-500 mm, and the range of the liquid level meter is 0-500 mm.

[0028] The setting of the graduated tube and the liquid level meter makes the utility model have a pressure protection function, the lower end scale of the graduated tube is kept horizontal with the zero scale of the liquid level meter, when the scale of the liquid level meter is 500 mm, the indication of the graduated tube where the liquid surface is located is 200 mm, at this time, the 0 scale of the graduated tube is kept flush with the surface of the ammonia water pipe. When the pressure of the sealed space connected with the ammonia water tank is P1 (Pa), that is, the positive pressure of the gas in the sealed space can lift up the water column.

[0029] The scale of the liquid level meter is I1, the graduated tube moves upward along the surface of the ammonia water tank by a distance d1, and the length of the graduated tube under water is I2, so that I1-d1=I2.

[0030] I1-d1=I2

[0031] ​That is, the scale tube can be moved upward along the surface of the ammonia tank by a distance d1, and the scale tube has a range of 0-50 cm, so from the above relationship, there is:

[0032]

[0033] When the closed space has a certain positive pressure (if it is 2000 Pa), moving the scale tube upward along the surface of the ammonia tank by 30 cm can keep the pressure in the closed space consistent with the length of the water level below the scale tube, so that the pressure change in the closed space can be understood by observing the change in the liquid level of the scale tube, thereby ensuring safety during use.

[0034] Example 2

[0035] In this embodiment, the ammonia recovery device includes an ammonia tank, the top of the ammonia tank is provided with an exhaust pipe, the exhaust pipe is connected with the ammonia tank through a first flange interface, the top of the ammonia tank is provided with a second flange interface, the second flange interface is used to be connected with a gas injection pipeline, mixed gas containing ammonia water is injected into the ammonia tank through the gas injection pipeline to carry out effective reaction, most of the ammonia gas is absorbed, and the remaining small amount of ammonia gas is discharged to high altitude after treatment through the exhaust pipe; a liquid level meter is arranged on the outer side of the upper part of the ammonia tank, a flow control valve is arranged on the outer side of the lower part, a scale tube that can be lifted is arranged in the ammonia tank, and a water tank cover is arranged on the top of the ammonia tank.

[0036] Specifically, the ammonia tank is connected with the gas injection pipeline through the second flange interface, and the injection rate and passage condition of the mixed gas containing ammonia gas are controlled through a ball valve. The ammonia tank is connected with the exhaust pipe through the first flange interface, a honeycomb-shaped exhaust port is arranged at the top end of the exhaust pipe, and a purifying agent is arranged in the exhaust pipe, so that a small amount of unrecovered ammonia gas in the ammonia tank can be catalyzed and reduced to non-toxic ammonia gas and oxygen, and a small amount of unreduced ammonia gas is discharged into high altitude air through the exhaust pipe, thereby further strengthening the recovery of ammonia tail gas. The ammonia tank is provided with a circular tank opening above the ammonia tank, which is used for water source updating in the ammonia tank. A flow control ball valve is arranged on the left side of the ammonia tank, and an external ton barrel can be connected, which is used for discharging and recovering saturated ammonia water in the ammonia tank. A liquid level meter connected with the ammonia tank is arranged on the right side of the ammonia tank, which is used for observing the water level in the tank.

[0037] The ammonia tank is connected with the scale tube, the scale tube is fixed on the top of the ammonia tank by means of a clamp, and can be moved up and down along the upper surface of the ammonia tank. The liquid level height in the ammonia tank is observed through the front observation window of the scale tube, the lifting of the scale tube is combined with the liquid level of the liquid level meter on the side wall of the ammonia tank, and according to the pressure condition in the closed space, the pressure in the closed space can be understood, thereby improving the safety during use.

[0038] The ammonia recovery device used in the ammonia detection process has the following advantages:

[0039] 1. The utility model discloses ammonia recovery in the ammonia detection process through the water in ammonia water tank absorption, control the scene escape ammonia, and the device is simple, low in cost, and the recovery effect is good.

[0040] 2. According to the pressure size in the closed space, through the telescopic length of the scale tube along the surface of ammonia water tank,

[0041] Observe the liquid level change, can real -time understand the positive pressure size in the closed space.

[0042] The above content is further detailed description of the utility model in combination with specific preferred embodiments, and cannot be determined that the specific implementation of the utility model is limited to the above description. For ordinary skilled person in the art to which the utility model belongs, on the premise of not departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the utility model.

Claims

1. An ammonia recovery apparatus for use in an ammonia detection process, characterized by: The ammonia recovery device comprises an ammonia water tank, a gas exhaust pipe is arranged on the top of the ammonia water tank, a honeycomb exhaust port is arranged on the top of the gas exhaust pipe, the gas exhaust pipe is connected with the ammonia water tank through a first flange interface, a second flange interface is arranged on the top of the ammonia water tank, and the second flange interface is used to be connected with a gas injection pipeline; a liquid level meter is arranged on the outer side of the ammonia water tank, a flow control valve is arranged on the lower part of the outer side, a lifting scale tube is arranged in the ammonia water tank, and a water storage tank cover is arranged on the top of the ammonia water tank.

2. An ammonia recovery apparatus for use in an ammonia detection process according to claim 1, wherein: The gas exhaust pipe is vertically connected with the ammonia water tank, the top of the gas exhaust pipe is provided with a honeycomb exhaust port, and a purifying agent is arranged in the gas exhaust pipe.

3. An ammonia recovery apparatus for use in an ammonia detection process according to claim 1, wherein: The gas exhaust pipe is fixed on the top of the ammonia water tank through a plurality of cables, and the height of the gas exhaust pipe is 4-7 times the height of the ammonia water tank.

4. The ammonia recovery device for use in the ammonia detection process according to claim 1, characterized in that: The top of the ammonia water tank is provided with a scale tube lifting hole matched with the diameter of the scale tube, one end of the scale tube is connected with the top of the ammonia water tank through a hoop, the scale tube can be lifted along the scale tube lifting hole, and lifting lugs are symmetrically arranged around the top of the ammonia water tank.

5. The ammonia recovery device for use in the process of ammonia detection according to claim 1, characterized in that: The scale tube has a range of 1-500 mm, and the liquid level meter has a range of 0-500 mm.

6. An ammonia recovery apparatus for use in an ammonia detection process according to claim 1, characterized in that: The water storage tank cover is square, and anti-skid threads are arranged around the water storage tank cover.

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