CN216223763U

CN216223763U - Absorption tower is used in nitric acid production

Info

Publication number: CN216223763U
Application number: CN202122802862.4U
Authority: CN
Inventors: 陈添龙
Original assignee: Shandong Huakaite Chemical Technology Equipment Co ltd
Current assignee: Shandong Huakaite Chemical Technology Equipment Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-04-08
Anticipated expiration: 2031-11-16

Abstract

The utility model belongs to the technical field of nitric acid production, and particularly discloses an absorption tower for nitric acid production, which comprises a tower body, wherein a nitric acid outlet is formed in the bottom end of the tower body, and an exhaust port is formed in the top end of the tower body; an air inlet is arranged below one side of the tower body, and a liquid inlet pipe is arranged above the air inlet; a liquid conveying pipe is arranged inside the tower body, one end of the liquid conveying pipe is communicated with the liquid inlet pipe, and a plurality of liquid outlet pipes are arranged at the bottom end of the liquid conveying pipe; a first bearing ring is fixedly connected to the inner side wall of the tower body above the infusion tube, and a purification assembly is arranged at the top of the first bearing ring; a corresponding position of one side of the tower body and the purification assembly is provided with a taking and placing opening, and the outer end of the taking and placing opening is provided with a fixing piece for fixing the purification assembly; the utility model can purify the discharged NOx gas, reduce the content of NOx discharged to the atmosphere and further reduce the pollution of the surrounding environment and the atmosphere of an enterprise.

Description

Absorption tower is used in nitric acid production

Technical Field

The utility model relates to the technical field of nitric acid production, in particular to an absorption tower for nitric acid production.

Background

The nitric acid absorption tower is a core device in the nitric acid production process, and has the functions of converting NOx gas from a cooler, absorption liquid and oxygen in the tower into nitric acid with the mass fraction of about 63.5% after reaction, enabling the NOx gas to enter from the bottom of the absorption tower, enabling the absorption liquid to flow from top to bottom of the absorption tower and reversely contact with rising NOx to perform chemical reaction to generate nitric acid solution, and discharging the generated nitric acid solution from the bottom of the absorption tower.

NOx gas is discharged into the atmosphere in the nitric acid production process, and the surrounding environment and atmospheric pollution of enterprises are easily affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an absorption tower for nitric acid production, which aims to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: an absorption tower for nitric acid production comprises a tower body, wherein a nitric acid outlet is formed in the bottom end of the tower body, and an exhaust port is formed in the top end of the tower body; an air inlet is arranged below one side of the tower body, and a liquid inlet pipe is arranged above the air inlet; a liquid conveying pipe is arranged inside the tower body, one end of the liquid conveying pipe is communicated with the liquid inlet pipe, and a plurality of liquid outlet pipes are arranged at the bottom end of the liquid conveying pipe; a first bearing ring is fixedly connected to the inner side wall of the tower body above the infusion tube, and a purification assembly is arranged at the top of the first bearing ring; one side of tower body and purification component's correspondence department has seted up and has got the mouth of putting, and the outer end of getting to put the mouth is equipped with and is used for carrying out the fixed mounting to purification component.

Preferably, a flow limiting plate is arranged between the infusion tube and the air inlet in the tower body, and a plurality of flow limiting holes are formed in the flow limiting plate at equal intervals.

Preferably, the purification assembly comprises a purification shell which is communicated up and down, two second bearing rings are correspondingly arranged on the inner side wall of the purification shell up and down, an activated carbon adsorption plate is placed on the second bearing ring on the upper part, and a filter screen plate is placed on the second bearing ring on the lower part; the purification shell is towards one side fixed mounting who gets the mouth of putting has the handle.

Preferably, the activated carbon adsorption plate and the filter screen plate are connected with the purification shell in an embedded manner.

Preferably, the fixing part comprises a fixing plate, one side of the fixing plate is fixedly connected with a plugging plate, the plugging plate is inserted into the taking and placing opening, and a pressing rod is fixedly connected to the corresponding position of the plugging plate and the handle; and fastening bolts are movably arranged above and below the fixed plate, and the head ends of the fastening bolts are in threaded connection with the preformed holes in the outer wall of the shell.

Preferably, a rubber layer is laid on the inner wall of the taking and placing opening and is in sliding connection with the plugging plate.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the flow limiting plate is arranged in the tower body, and the flow limiting holes are arranged on the flow limiting plate, so that the time of the NOx gas staying in the tower body can be prolonged, the NOx gas can uniformly rise, the contact area and time of the NOx gas and the absorption liquid are increased, and the gas-liquid conversion efficiency is increased.

2. According to the utility model, the purification component is arranged in the tower body, so that unconverted NOx gas can be purified and discharged, and the pollution to the surrounding environment and atmosphere of an enterprise is reduced; the purifying assembly is placed on the first bearing ring and is pressed and fixed through the pressing rod, and the installation is simple; through dismantling fastening bolt, be convenient for remove the fixed to the fixed plate, remove the back, be convenient for take out the shutoff board from getting to put the mouth, take out the back, can take out through the handle and purify the subassembly, make things convenient for the later stage to change or clear up filter plate, active carbon adsorption plate.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural view of a tower body of the present invention;

FIG. 3 is a schematic view of the purification assembly of the present invention;

FIG. 4 is a schematic structural view of a purification shell of the present invention;

fig. 5 is a partially enlarged schematic view of the present invention.

In the figure: 1. a tower body; 2. a nitric acid outlet; 3. an exhaust port; 4. an air inlet; 5. a liquid inlet pipe; 6. a transfusion tube; 7. a liquid outlet pipe; 8. a first load ring; 9. a purification assembly; 91. purifying the shell; 92. a second load ring; 93. an activated carbon adsorption plate; 94. a filter screen plate; 95. a handle; 10. a taking and placing port; 11. a restrictor plate; 12. a flow restriction orifice; 13. a fixing plate; 14. a plugging plate; 15. a pressing rod; 16. fastening a bolt; 17. a rubber layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-5, the present invention provides a technical solution: an absorption tower for nitric acid production comprises a tower body 1, wherein a nitric acid outlet 2 is arranged at the bottom end of the tower body 1, and an exhaust port 3 is arranged at the top end of the tower body 1; an air inlet 4 is arranged below one side of the tower body 1, and a liquid inlet pipe 5 is arranged above the air inlet 4; a liquid conveying pipe 6 is arranged inside the tower body 1, one end of the liquid conveying pipe 6 is communicated with the liquid inlet pipe 5, and a plurality of liquid outlet pipes 7 are arranged at the bottom end of the liquid conveying pipe 6; a first bearing ring 8 is fixedly connected to the inner side wall of the tower body 1 above the infusion tube 6, and a purification component 9 is arranged at the top of the first bearing ring 8; a taking and placing opening 10 is formed in the position, corresponding to the purification assembly 9, on one side of the tower body 1, and a fixing piece for fixing the purification assembly 9 is arranged at the outer end of the taking and placing opening 10; the purification component 9 is matched with the pick-and-place port 10, so that the purification component 9 is convenient to take out.

Furthermore, a flow limiting plate 11 is arranged between the infusion tube 6 and the air inlet 4 in the tower body 1, and a plurality of flow limiting holes 12 are arranged on the flow limiting plate 11 at equal intervals.

Furthermore, the purification assembly 9 comprises a purification shell 91 which is communicated up and down, two second bearing rings 92 are correspondingly arranged on the upper and lower inner side walls of the purification shell 91, an activated carbon adsorption plate 93 is placed on the upper second bearing ring 92, and a filter screen plate 94 is placed on the lower second bearing ring 92; a handle 95 is fixedly installed on one side of the purifying shell 91 facing the taking and placing opening 10.

Further, the activated carbon adsorption plate 93 and the filter screen plate 94 are both connected to the purification shell 91 in an embedded manner.

Further, the fixing part comprises a fixing plate 13, one side of the fixing plate 13 is fixedly connected with a blocking plate 14, the blocking plate 14 is inserted into the taking and placing opening 10, and a pressing rod 15 is fixedly connected to a position, corresponding to the handle 95, of the blocking plate 14; and fastening bolts 16 are movably arranged above and below the fixing plate 13, and the head ends of the fastening bolts 16 are in threaded connection with the preformed holes in the outer wall of the shell 1.

Further, the rubber layer 17 is laid on the inner wall of the taking and placing port 10, the rubber layer 17 is in sliding connection with the blocking plate 14, the sealing performance of the taking and placing port 10 is improved due to the arrangement of the rubber layer 17, and the overflow of the NOx gas which is not purified is avoided.

The working principle is as follows: when the device is used, NOx gas enters the tower body from the gas inlet 4, absorption liquid enters the liquid conveying pipe 6 from the liquid inlet pipe 5, enters the liquid outlet pipe 7 from the liquid conveying pipe 6, flows from top to bottom from the liquid outlet pipe 7, is in reverse contact with the rising NOx gas to carry out chemical reaction to generate nitric acid solution, and the generated nitric acid solution is discharged from the nitric acid outlet 2 at the bottom end of the tower body 1; the flow limiting plate 11 is arranged in the tower body 1, and the flow limiting plate 12 is provided with the plurality of flow limiting holes 12, so that the time of the NOx gas staying in the tower body 1 can be prolonged, the NOx gas can uniformly rise, the contact area and time of the NOx gas and the absorption liquid are increased, and the gas-liquid conversion efficiency is further improved; the unreacted NOx gas continuously rises and is discharged through the exhaust port 3 after being purified by the filter screen plate 94 and the activated carbon adsorption plate 93, so that the pollution to the surrounding environment and the atmosphere of an enterprise can be reduced; when the filter screen plate 94 and the activated carbon adsorption plate 93 are cleaned or replaced, the fastening bolt 16 is detached, the fixing of the fixing plate 13 is released, after the fixing plate 13 is released, the plugging plate 14 is taken out from the taking and placing opening 10 through the fixing plate 13, after the plugging plate is taken out, the pressing rod 15 is not pressed on the handle 95, the purification component 9 can be taken out through the handle 95, after the purification component 9 is taken out, the filter screen plate 94 and the activated carbon adsorption plate 93 which are embedded in the purification shell 91 are taken out, and therefore the filter screen plate 94 and the activated carbon adsorption plate 93 can be replaced or cleaned conveniently.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An absorption tower for nitric acid production is characterized by comprising a tower body (1), wherein a nitric acid outlet (2) is arranged at the bottom end of the tower body (1), and an exhaust port (3) is arranged at the top end of the tower body (1); an air inlet (4) is arranged below one side of the tower body (1), and a liquid inlet pipe (5) is arranged above the air inlet (4); a liquid conveying pipe (6) is arranged inside the tower body (1), one end of the liquid conveying pipe (6) is communicated with the liquid inlet pipe (5), and a plurality of liquid outlet pipes (7) are arranged at the bottom end of the liquid conveying pipe (6); a first bearing ring (8) is fixedly connected to the inner side wall of the tower body (1) above the infusion tube (6), and a purification assembly (9) is arranged at the top of the first bearing ring (8); a taking and placing opening (10) is formed in one side of the tower body (1) and the corresponding position of the purification assembly (9), and a fixing piece used for fixing the purification assembly (9) is arranged at the outer end of the taking and placing opening (10).

2. The absorption tower for producing nitric acid according to claim 1, wherein: a flow limiting plate (11) is arranged between the infusion tube (6) and the air inlet (4) in the tower body (1), and a plurality of flow limiting holes (12) are arranged on the flow limiting plate (11) at equal intervals.

3. The absorption tower for producing nitric acid according to claim 1, wherein: the purification assembly (9) comprises a purification shell (91) which is communicated up and down, two second bearing rings (92) are correspondingly arranged on the upper portion and the lower portion of the inner side wall of the purification shell (91), an activated carbon adsorption plate (93) is placed on the second bearing ring (92) on the upper portion, and a filter screen plate (94) is placed on the second bearing ring (92) on the lower portion; the handle (95) is fixedly arranged on one side of the purifying shell (91) facing the taking and placing opening (10).

4. The absorption tower for producing nitric acid according to claim 3, wherein: the activated carbon adsorption plate (93) and the filter screen plate (94) are both connected with the purification shell (91) in an embedded manner.

5. The absorption tower for producing nitric acid according to claim 1, wherein: the fixing piece comprises a fixing plate (13), one side of the fixing plate (13) is fixedly connected with a blocking plate (14), the blocking plate (14) is inserted into the taking and placing opening (10), and a pressing rod (15) is fixedly connected to the corresponding position of the blocking plate (14) and the handle (95); and fastening bolts (16) are movably arranged on the upper part and the lower part of the fixing plate (13), and the head ends of the fastening bolts (16) are in threaded connection with the preformed holes in the outer wall of the shell (1).

6. The absorption tower for producing nitric acid according to claim 1, wherein: a rubber layer (17) is laid on the inner wall of the taking and placing opening (10), and the rubber layer (17) is in sliding connection with the plugging plate (14).