Mass transfer apparatus

 

(57) Abstract:

The invention relates to a device for holding heat and mass transfer processes such as distillation, adsorption, condensation of steam, cooling the gas-vapor mixtures, gas purification, etc., and can be used in chemical, petrochemical, oil refining, metallurgical, pulp and paper and other industries. Objective improving the efficiency of the operation of the apparatus. Mass transfer apparatus, comprising a housing, a gas contact device in the form of a woven mesh, a pipe for supply and withdrawal of gas, a container for liquid, the yield of the gas connection is located below the gas contact device, equipped with an additional woven grid located below the level of the outlet pipe of the gas supply tank for liquid communicated to the highway, which includes the pump, with the cavity of the housing above the gas contact device; additional woven mesh may be located at a distance L from the distribution of the contact device, with m, where 1 < < 2 - ripple-liquid layer; is the coefficient of surface tension of the YIG/m3; g - gravitational acceleration, m/s2. 1 C.p. f-crystals, 4 Il., table 1.

The invention relates to a device for holding heat and mass transfer processes such as distillation, adsorption, condensation of steam, cooling the gas-vapor mixtures, gas purification, etc., and can be used in chemical, petrochemical, oil refining, metallurgical, cellulosome and other industries.

Known mass transfer apparatus for cleaning gas, comprising a housing with connections for input and output of gas and liquid, the group lattices, horizontally installed inside the height at a distance from one another by separation of the internal cavity of the housing and under-grid nakasatocho zone, bringatrailer placed in nudesmodel area of the body, and the camera drain the fluid communicated with the nozzle output fluid; the apparatus is further provided with a gas-feeding pipe and a closed wall, and the nozzle gas inlet attached to the body at the level of nudesmodel area and communicated with the specified gas-feeding pipe, which is located inside the housing and has a straight line segment, passing vertically through the grid along the axis of the housing, while the bottom is and the partition is mounted inside the housing vertically and at a distance from its walls to form between them a cavity chamber drain the fluid, moreover, the lattice is fixed around the perimeter of the inner surface of the septum, the upper end of the baffle is located above the upper grid and serves as its overflow threshold, and the lower end of the baffle is located below the lower grid, limiting under-grid area, see the patent of the Russian Federation 2079344 from 03.06.1995, IPC B 01 D 47/04.

The disadvantage of this technical solution is the low intensity of heat and mass transfer processes.

Known mass transfer apparatus comprising a vertical casing, a gas contact device made in the form of a woven mesh, placed at a height H to the end of the lower housing of the apparatus with the bottom or without and is not less than

< / BR>
where 2 is the coefficient that takes into account the amplitude of the pulsations of the gas-liquid layer;

- coefficient of the fluid surface tension, N/m;

dEQ- equivalent diameter woven mesh contact device, m;

- the density of liquid, kg/m3;

g - free fall acceleration, m/s2;

the device includes a nozzle for feeding and withdrawal of gas, a container for liquid, coupled to a bottom of the housing, and the gas connection is displayed in the space under gatorcpa apparatus, taken as a prototype of the present invention, used gas contact unit (CCU), made of synthetic polymeric monofilaments; such of the civil code provide a more active hydrodynamic regime with a much lower and almost constant total hydraulic resistance in a wide range of loads on gas and low energy costs of the process. The stable operation of such devices is significantly higher in comparison with the above-described analog.

However, the device according to patent RU 2165283 has a serious disadvantage, which is that during operation the liquid in the space under the civil code has not horizontal level, and takes the position reflected in Fig.3 and Fig.4 graphic materials, attached to this application. Thus, to a considerable extent (up to 20% of the area) of the civil code is closed by the liquid, which prevents the passage of gas through the CSU in this area. It should be noted that even when the flow rate increases and, accordingly, the present speed of the injected gas, the free zone of the CSU does not increase; there is an increase in the rate of passage of gas through the holes in the free zone of the civil code, when this liquid is the entrainment of liquid from the surface of the CSU. The above-mentioned circumstances substantially reduce the intensity of heat and mass transfer processes and, accordingly, the efficiency of the device as a whole.

The present invention is based on a solution of the problem of increase of efficiency of functioning of the device.

According to the invention this problem is solved due to the fact that the mass transfer apparatus, comprising a housing, a gas contact device in the form of a woven mesh, a pipe for supply and withdrawal of gas, a container for liquid, the yield of the gas connection is located below the gas contact device, equipped with an additional woven grid located below the level of the outlet pipe of the gas supply tank for liquid communicated to the highway, which includes the pump, with the cavity of the housing above the gas contact device; additional woven mesh may be located at a distance L from the distribution of the contact device, with

< / BR>
where 1< - coefficient of the fluid surface tension, N/m;

dEQ- equivalent diameter woven mesh contact device, m;

- the density of liquid, kg/m3;

g - acceleration of their decisions, identical to the present invention, which allows to make a conclusion about its compliance with the criterion of "novelty".

Implementation characteristics of the invention leads to a very important new properties of the object: do not allow contact of the fluid with the lower surface of the CSU and prevents the reduction of the free zone through which the gas passes into the space above the civil code, where are the heat and mass transfer processes. This provides a significant increase in the efficiency of the device.

The applicant has not found any sources of information containing data about the impact of an alleged distinguishing signs on achieved as a result of their implementation of the technical result. This, according to the applicant demonstrates compliance with this technical solution, the criterion of "inventive step".

The invention is illustrated by drawings, which shows:

in Fig.1 is a longitudinal section of the device;

in Fig.2 is a variant of the device with a lateral gas flow;

in Fig. 3 is a diagram illustrating the distribution of fluid in the space under the civil code in the device-prototype;

in Fig.4 - same as in Fig.3, a variant with a lateral gas supply.

Mass transfer apt the particular example used a grid of polymeric monofilaments, made from polyethylene terephthalate-treated polyvinylidene fluoride. The diameter of the monofilaments is 0.81-0,83 mm Character of weaving linen. The equivalent diameter (dEQ) holes in the woven mesh in the specific example is 1.27 mm, the free section of the grid is 23%.

The apparatus has a nozzle 3 for the feed pipe 4 to the gas outlet and the capacity of 5 to accommodate the fluid. The output 6 of the pipe 3, the gas supply is located below the CCU 2. The device is equipped with additional woven mesh 7, made in the specific example of the same material as the civil code, but with a smaller dEQ=0,62 mm and the free cross section of the grid compared to 12.1%. Additional woven mesh 7 is located at a distance L from the CCU 2, with

< / BR>
where 1< - coefficient of the fluid surface tension, N/m;

dEQ- equivalent diameter woven mesh contact device, m;

- the density of liquid, kg/m3;

g - free fall acceleration, m/s2.

The coefficient depends on the present speed V m/s gas in the apparatus. The empirical dependence of the coefficient of V in the table.

It should be noted that when V<0.3 m/s does not provide an effective amount of processing gas, and when V>4 m/s of origin Taiwan is part of the housing 1 above the CCU 2.

The device operates as follows.

Through the pipe 3, the gas is fed, in the specific example, chlorine. The liquid 10, in particular, a 10% solution of Na2CO3placed in the vessel 5 and is designed to absorb the chlorine. The liquid 10 is the lower part of the cavity of the housing 1, and also by means of pump 9 is fed into the space above the CCU 2. In the initial position, the liquid is at the level of the CCU 2. The gas pushes the liquid in the space 11 between the CCU 2 and the grid 7 in the space above the CCU 2, with virtually all the space 11 is released from the liquid. Accordingly, the entire lower surface of the CCU 2 is free, and the gas across the surface takes place in the space above the CCU 2 and reacts with extruded from the space 11 by the fluid, and the fluid supplied by a pump 9.

Further supply of liquid to gas absorption is carried out only by the pump 9; reacted with the gas liquid under the action of gravity falls" in 12 places with the greatest height of the liquid layer 13 through the CCU 2, passes through the gas filled space 11, the grid 7 and enters the tank 5.

The process continues until the supply and absorption of gas. The volume and concentration of peg is

For the implementation used a simple industrial equipment and materials available, hence the invention according to the criterion of "industrial applicability".

1. Mass transfer apparatus, comprising a housing, a gas contact device in the form of a woven mesh, a pipe for supply and withdrawal of gas, a container for liquid, the yield of the gas connection is located below the gas contact device, characterized in that it is provided with an additional woven grid located below the level of the outlet pipe of the gas supply, and the capacity for fluid communicated to the highway, which includes the pump, with the cavity of the housing above the gas contact device.

2. Mass transfer apparatus under item 1, characterized in that the additional woven mesh is located at a distance L from the distribution of the contact device, with

< / BR>
where 1 < < 2 - ripple-liquid layer;

- coefficient of the fluid surface tension, N/m;

dEQ- equivalent diameter woven mesh contact device, m;

- the density of liquid, kg/m3;

g is the acceleration drop

 

Same patents:

The invention relates to nozzles of heat and mass transfer devices with three-phase fluidized layer and can be used in chemical and other industries

The invention relates to a fluid dispenser, in particular, for columns with a gasket according to the restrictive part II

The invention relates to methods of producing sodium nitrite and absorption apparatus for carrying out the process and can be used in the chemical industry and other sectors of the economy

The invention relates to a method of the fluid in the device according to the restrictive part II

The invention relates to a fluid dispenser for mass transfer columns

The invention relates to a mass transfer apparatus that performs the role of filter-dryers gas control systems of gas pipelines

The invention relates to processes of contact fluid for subsequent separation by absorption and rectification between gas and liquid at the extraction or separation of the emulsion, separation and coalescence fine liquid droplets in the gas stream and may find application in gas, petrochemical, oil, food and other industries

The invention relates to equipment of heat and mass transfer processes, such as distillation, absorption, condensation of the steam, cooling the gas-vapor mixtures and others, and can be used in chemical, petroleum refining and related industries

The invention relates to catalytic means for catalytic treatment of exhaust gas

The invention relates to the chemical and petrochemical industry, in particular, to the designs of nozzles, designed for distribution of liquid and gas phases, and can be used in film units in the implementation of various heat and mass transfer processes (absorption, condensation, heating, cooling, and so on), as well as in the processes of distillation, especially when selecting cleaning monomers intended for processing in the chemical fiber or plastic in the chemical, petrochemical and other related industries

The invention relates to mass transfer tubular film devices

The invention relates to methods for separation of multicomponent mixtures, t

The invention relates to methods for separation of multicomponent mixtures bizcochada and homogenization liquids, ie,

FIELD: chemical engineering.

SUBSTANCE: apparatus comprises groups of parallel rectangular plates with corrugated bottom. The ribs of the corrugation are oriented along the flow, and the distance between the plates does not exceed 30 mm. Between the plates, rods or pipes are arranged at an angle 90±15° to the vector of flows. The plates are assembled in groups of parallel plates inclined downstream. The uniform distribution of fluid over the plates when fluid flows from one plate group to another group is provided by means of distributing-overflowing devices.

EFFECT: decreased hydraulic drag.

2 cl, 5 dwg

Up!