Falling film absorption device
By designing staggered absorption tube groups and connecting structures in the falling film absorption device, the contact time between the absorbent and the exhaust gas is extended, the problem of high flow velocity under the liquid film is solved, and the absorption effect of the exhaust gas is improved.
Patent Information
- Application Number
- CN202520104587.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-16
AI Technical Summary
In existing falling film absorption devices, the liquid film flows down at a high speed, resulting in a relatively short contact time with the exhaust gas, which affects the exhaust gas absorption effect.
A falling film absorption device is designed, in which multiple absorption tube groups are arranged vertically inside the shell. Adjacent absorption tube groups are connected by a connecting structure, and the vertically adjacent absorption tubes are staggered. This allows the absorbent to reform a liquid film and flow into the next absorption tube when it flows along the connecting structure under the action of gravity, thus prolonging the contact time between the absorbent and the exhaust gas.
By extending the contact time between the absorbent and the exhaust gas, the absorption effect of the exhaust gas is improved, and the absorption capacity of the absorbent is enhanced.
Smart Images
Figure CN223747288U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to falling film absorption technology, in particular to a falling film absorption device. BACKGROUND
[0002] In the process of generating methyl trichlorosulfonium from carbon disulfide and chlorine, a proper amount of hydrochloric acid is needed as a catalyst. Although carbon disulfide and chlorine can generate by-product hydrochloric acid, the hydrochloric acid after liquid separation still contains a certain amount of sulfuric acid and sulfurous acid, which is not suitable for use as a catalyst. The main component of the tail gas in the production of methyl trichlorosulfonium is hydrogen chloride, and there is a small amount of carbon disulfide and chlorine, and the sulfur content is very low. After absorption, it can be used as a catalyst for the synthesis of methyl trichlorosulfonium.
[0003] At present, a falling film absorption device is usually used to absorb hydrogen chloride and chlorine in the tail gas with water to generate hydrochloric acid, which is used as a catalyst for the synthesis of methyl trichlorosulfonium. In the use of the existing falling film absorption device, the absorbent (water) forms a liquid film attached to the inner wall of the absorption pipe and flows downward along the inner wall of the absorption pipe, while the tail gas flows upward in the absorption pipe and contacts the liquid film attached to the inner wall of the absorption pipe. The liquid film absorbs hydrogen chloride and chlorine in the tail gas to generate hydrochloric acid. However, the liquid film attached to the inner wall of the absorption pipe is formed by the gravity of the absorbent, and the absorption pipe is a vertical pipe structure. Under the action of gravity acceleration, the downward flow speed of the liquid film gradually increases, which leads to a relatively short contact time with the tail gas, thereby affecting the absorption effect of the tail gas. CONTENT OF THE UTILITY MODEL
[0004] The present application provides a falling film absorption device to solve the problem that the existing falling film absorption device has a fast downward flow speed of the liquid film, a relatively short contact time with the tail gas, and affects the absorption effect of the tail gas.
[0005] The present application provides a falling film absorption device, which comprises a shell, an exhaust pipe and a liquid inlet pipe connected to the upper part of the shell, and an air inlet pipe and a liquid outlet pipe connected to the lower part of the shell.
[0006] The inside of the shell is provided with a plurality of absorption pipe groups distributed in an up-down manner, and adjacent two absorption pipe groups are connected to each other through a communication structure. The uppermost absorption pipe group and the lowermost absorption pipe group are connected to the shell through baffles.
[0007] The absorption pipe group is composed of a plurality of uniformly distributed absorption pipes, and the upper and lower adjacent absorption pipes are staggered.
[0008] Optionally, the communication structure is a hollow box structure, and the upper end and the lower end of the communication structure are in communication and sealingly fixed connection with the corresponding absorption pipe groups.
[0009] Optionally, the upper end of the uppermost absorption pipe group extends to above the liquid inlet pipe.
[0010] Optionally, a valve for adjusting the liquid inlet amount is installed on the liquid inlet pipe.
[0011] Optionally, a support vertically distributed and used for supporting the shell is connected with the shell, and a leveling structure is connected with the lower end of the support.
[0012] Optionally, the leveling structure comprises a mounting ring fixedly connected with the support, a plurality of internally-threaded sleeves uniformly distributed in a ring shape are fixedly arranged on the mounting ring, a screw rod is engaged with the inside of the internally-threaded sleeve, a supporting leg is rotatably connected with the lower end of the screw rod, and a hand wheel is fixedly arranged on the upper end of the screw rod.
[0013] Optionally, an installation plate is fixedly arranged in the inside of the mounting ring, and a bubble level is fixedly arranged on the installation plate.
[0014] The falling film absorption device provided in the application comprises a shell, a plurality of absorption pipe groups vertically distributed in the inside of the shell, and a plurality of communication structures for mutually communicating between adjacent two absorption pipe groups, wherein the absorption pipe group at the uppermost end and the absorption pipe group at the lowermost end are connected with the shell through baffles, the absorption pipe group is composed of a plurality of uniformly distributed absorption pipes, and the upper and lower adjacent absorption pipes are staggered, so that in use, the absorbent first enters the shell from the liquid inlet pipe, then flows into the inside of the uppermost absorption pipe, forms a liquid film on the inner wall of the uppermost absorption pipe and flows downward into the communication structure, then flows into the absorption pipe connected with the lower end of the communication structure from the communication structure, forms a liquid film on the inner wall of the absorption pipe again and flows downward into the next communication structure, and then flows into the next absorption pipe from the communication structure, so that the absorbent can pass through each absorption pipe group and each communication structure from top to bottom, and since the upper and lower adjacent absorption pipes are staggered, that is, the absorption pipe connected with the upper end of each communication structure and the absorption pipe connected with the lower end of each communication structure are staggered, the absorbent can flow downward again according to its own gravity after flowing through the communication structure each time, thereby reducing the speed of the whole downward flow process of the absorbent, increasing the contact time of the absorbent and the tail gas, and improving the absorption effect of the tail gas. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0016] Figure 1 The three-dimensional structure schematic diagram of the falling film absorption device provided in the embodiments of the application;
[0017] Figure 2A schematic diagram of a front view of a falling film absorption device provided by an embodiment of the present application is shown in the figure.
[0018] Figure 3 A schematic diagram of an enlarged structure of an A area is shown in the figure. Figure 2
[0019] Figure 4 A schematic diagram of a partial three-dimensional structure of a falling film absorption device provided by an embodiment of the present application is shown in the figure.
[0020] Explanation of reference numerals: housing 1, exhaust pipe 2, liquid inlet pipe 3, gas inlet pipe 4, liquid outlet pipe 5, absorption pipe group 6, absorption pipe 61, communication structure 7, baffle 8, valve 9, support 10, leveling structure 11, mounting ring 111, internal thread sleeve 112, screw rod 113, foot 114, hand wheel 115, mounting plate 116, level bubble 117. DETAILED DESCRIPTION
[0021] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are described below clearly and completely. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.
[0022] As shown in the figure: a falling film absorption device provided by an embodiment of the present application includes a housing 1, an exhaust pipe 2 and a liquid inlet pipe 3 are connected to the upper part of the housing 1, and a gas inlet pipe 4 and a liquid outlet pipe 5 are connected to the lower part of the housing 1. Figures 1-4 The inside of the housing 1 is provided with a plurality of absorption pipe groups 6 distributed in an up-down manner, and adjacent two absorption pipe groups 6 are communicated with each other through a communication structure 7. The uppermost absorption pipe group 6 and the lowermost absorption pipe group 6 are connected with the housing 1 through a baffle 8. Specifically, the uppermost absorption pipe group 6 and the lowermost absorption pipe group 6 penetrate through the baffle 8 and are sealingly and fixedly connected with the baffle 8, and the baffle 8 is sealingly and fixedly connected with the inner wall of the housing 1.
[0023] The absorption pipe group 6 is composed of a plurality of uniformly distributed absorption pipes 61, and the upper and lower adjacent absorption pipes 61 are staggered.
[0024]
[0025] In use, the absorbent (water) first enters the upper part of the shell 1 from the liquid inlet pipe 3, then flows into the inner part of the uppermost absorption pipe 61, forms a liquid film on the inner wall of the uppermost absorption pipe 61, and flows downward into the communication structure 7, then flows into the absorption pipe 61 connected with the lower end of the communication structure 7 from the communication structure 7, and forms a liquid film on the inner wall of the absorption pipe 61 again and flows downward into the next communication structure 7, and then flows into the next absorption pipe 61 from the communication structure 7. In this way, the absorbent can pass through each absorption pipe group 6 and each communication structure 7 from top to bottom, and finally flow to the bottom of the shell 1. At the same time, the exhaust gas enters the lower part of the shell 1 from the gas inlet pipe 4, then passes through each absorption pipe group 6 and each communication structure 7 from bottom to top, and is discharged from the gas outlet pipe 2. When the exhaust gas passes through the absorption pipe group 6 and the communication structure 7, the exhaust gas contacts the absorbent in the absorption pipe group 6 and the communication structure 7, the absorbent absorbs hydrogen chloride and chlorine in the exhaust gas, and generates hydrochloric acid. Finally, the hydrochloric acid is discharged from the liquid outlet pipe 5, and the exhaust gas is discharged from the gas outlet pipe 2.
[0026] The falling film absorption device provided by the embodiment is characterized in that a plurality of absorption pipe groups 6 are arranged in the shell 1 in a vertical direction, and adjacent two absorption pipe groups 6 are connected with each other through a communication structure 7. The uppermost absorption pipe group 6 and the lowermost absorption pipe group 6 are connected with the shell 1 through a baffle 8. Each absorption pipe group 6 is composed of a plurality of absorption pipes 61 arranged uniformly. Adjacent absorption pipes 61 arranged in the upper and lower directions are staggered, that is, the absorption pipe 61 connected with the upper end of each communication structure 7 and the absorption pipe 61 connected with the lower end of each communication structure 7 are staggered. In use, the absorbent vertically flows into the communication structure 7 along the absorption pipe 61 connected with the upper end of the communication structure 7 according to its own gravity, and then flows into the absorption pipe 61 connected with the lower end of the communication structure 7 along the horizontal direction in the communication structure 7, and then flows downward in the absorption pipe 61 according to its own gravity again. In this way, the speed of the downward flow of the absorbent can be reduced, the contact time between the absorbent and the exhaust gas is increased, and the absorption effect of the exhaust gas is improved.
[0027] In some embodiments of the present application, the communication structure 7 is a hollow box structure. The upper end and the lower end of the communication structure 7 are connected with the corresponding absorption pipe group 6 and are sealingly and fixedly connected, so as to realize the connection between the adjacent two absorption pipe groups 6.
[0028] In some embodiments of the present application, the upper end of the uppermost absorption pipe group 6 extends to the upper side of the liquid inlet pipe 3. When the absorbent enters the shell 1, the absorbent first falls to the upper end of the uppermost baffle 8, and then flows into all the absorption pipes 61 penetrating through the uppermost baffle 8 after the upper end of the uppermost baffle 8 is stored to a certain liquid level. In this way, all the absorption pipes 61 can simultaneously perform the exhaust gas absorption work.
[0029] In some embodiments of the present application, the liquid inlet pipe 3 is provided with a valve 9 for adjusting the amount of liquid. After adjusting the amount of liquid in the liquid inlet pipe 3 by the valve 9, the amount of liquid in the absorption pipe 61 can be adjusted, and then the thickness of the liquid film can be adjusted.
[0030] In the present embodiment, the valve 9 is an electric flow valve.
[0031] In actual installation of the shell 1, the shell 1 needs to be installed vertically, that is, the absorption pipe group 6 in the shell 1 is vertically distributed. In order to facilitate the vertical installation of the shell 1, in some embodiments of the present application, the shell 1 is fixedly connected with a support 10 which is vertically distributed and used for supporting the shell 1. The lower end of the support 10 is connected with a leveling structure 11.
[0032] In use, the leveling structure 11 is operated to adjust the support 10 to be vertically distributed. At this time, the shell 1 is vertically distributed, and the absorption pipe group 6 in the shell 1 is also vertically distributed. After the absorption pipe group 6 is vertically distributed, the upper ends of all the absorption pipes 61 in the absorption pipe group 6 are horizontally distributed and located in the same plane. The absorbent flows into each absorption pipe 61 at the same time and uniformly. Therefore, only the leveling structure 11 needs to be operated to adjust the absorption pipe group 6 to be vertically distributed, which has the effect of facilitating adjustment.
[0033] In some embodiments of the present application, the leveling structure 11 includes a mounting ring 111 fixedly connected with the support 10. The mounting ring 111 is fixed at the lower end of the support 10. A plurality of internally threaded sleeves 112 are fixed on the mounting ring 111 and are uniformly distributed in a ring shape. Specifically, the internally threaded sleeves 112 penetrate through the mounting ring 111 and are fixedly connected with the mounting ring 111. The internally threaded sleeves 112 are engaged with a screw rod 113. The lower end of the screw rod 113 is rotatably connected with a foot 114 through a bearing. The upper end of the screw rod 113 is fixed with a hand wheel 115 for facilitating rotation of the screw rod 113.
[0034] In the present embodiment, the mounting ring 111 can be adjusted to be horizontally distributed only by rotating the screw rod 113 at different positions. After the mounting ring 111 is horizontally distributed, the support 10, the shell 1 and the absorption pipe group 6 are vertically distributed, which has the effect of convenient operation.
[0035] In some embodiments of the present application, an installation plate 116 is fixed in the mounting ring 111. A bubble level 117 is fixed on the installation plate 116 to facilitate determination of whether the mounting ring 111 is leveled.
[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand; it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A falling film absorption device, comprising a shell (1), an exhaust pipe (2) and a liquid inlet pipe (3) are connected to the upper part of the shell (1), an air inlet pipe (4) and a liquid outlet pipe (5) are connected to the lower part of the shell (1), characterized in that: a plurality of absorption pipe groups (6) are arranged in the shell (1) in an up-down distribution, and adjacent two absorption pipe groups (6) are connected to each other through a communication structure (7), the uppermost absorption pipe group (6) and the lowermost absorption pipe group (6) are connected to the shell (1) through a baffle (8); the absorption pipe group (6) is composed of a plurality of uniformly distributed absorption pipes (61), and adjacent absorption pipes (61) are arranged in an interlaced distribution.
2. The falling film absorption apparatus of claim 1, wherein: The communication structure (7) is a hollow box structure, and the upper end and the lower end of the communication structure (7) are respectively connected to and sealingly fixed with the corresponding absorption pipe group (6).
3. The falling film absorber according to claim 1, characterized in that: The upper end of the uppermost absorption pipe group (6) extends above the liquid inlet pipe (3).
4. The falling film absorber according to claim 3, characterized in that: A valve (9) for adjusting the liquid inlet amount is installed on the liquid inlet pipe (3).
5. The falling film absorber according to any one of claims 1 to 4, characterized in that: The shell (1) is connected with a support (10) arranged vertically and used for supporting the shell (1), and the lower end of the support (10) is connected with a leveling structure (11).
6. The falling film absorber according to claim 5, characterized in that: The leveling structure (11) comprises a mounting ring (111) fixedly connected with the support (10), a plurality of internally threaded sleeves (112) are fixedly arranged on the mounting ring (111) in an annular and uniform distribution, a screw rod (113) is engaged in the internally threaded sleeves (112), a supporting leg (114) is rotatably connected to the lower end of the screw rod (113), and a hand wheel (115) is fixedly connected to the upper end of the screw rod (113).
7. The falling film absorber according to claim 6, characterized in that: An installation plate (116) is fixedly arranged in the mounting ring (111), and a bubble level (117) is fixedly arranged on the installation plate (116).