Ceramic element of packing

FIELD: forming of elements for dumped packing used for filling columns for mass- and heat-exchange processes.

SUBSTANCE: axis of symmetry of proposed element lies in way of its length. Ratio of largest size perpendicular to length and defining diameter (D) of element to length (L) ranges from 2.7 to 4.5. Element has polygonal cross section with six sides and many internal partitions forming passages at triangular cross section.

EFFECT: possibility of obtaining optimal working parameters.

15 cl, 5 dwg

 

The present invention relates to the creation of the elements of the nozzle, which is often referred to as disordered or bulk head. Such nozzle is used to populate the columns in which processes mass or heat transfer. A particularly important application is found such ceramic elements in the operations of heat recovery, which is necessary to ensure effective contact with hot fluids passing through the reactor. Another key factor in achieving maximum efficiency is to maintain the lowest possible pressure difference between the upper and lower parts of the column. To ensure that the elements of the nozzle should have a minimum resistance to the flow. This is facilitated by the very open structure, but only open structures are of limited use if the items in the column together form a set in which part of one element of the nozzles penetrate into the space of another element. It is therefore important that the design allowed us to reduce to the minimum the possible elements to include in each other.

The present invention particularly relates to the creation of ceramic elements nozzles, which are obtained by means of extrusion or drying under pressure and, therefore, are mainly uniform cross-section in about the EBM axial direction, which forms the axis of symmetry of the element. Described a number of such configurations of the elements of the nozzle, from the very simple to the very complex. They are all based mostly on the use of cylindrical shape and differ mainly in the internal structure inside a cylindrical configuration. The simplest structure is a basic cylinder, which has no internal structure. This structure type nozzle, which is often called the ring process, known for many years. At the other end of the range in complexity patterns are described in U.S. patent for an industrial design No.455029 and in U.S. patent for the invention No.6007915. Between the two ends are of a configuration in the form of a simple wheel of the car, for example, such as described in U.S. patent No.3907710 and No.4510263.

It was found that the sizes of these configurations are critical to achieve optimal operating parameters, and the range of sizes required to achieve such optimum operating parameters not listed in well-known publications. In U.S. patent No.4510263 shows the relationship of L:D in the range from 0.5 to 5, but it is reported that preferential treatment are in the range from 0.5 to 2. In U.S. patent No.3907710 no guidance on the ratio of the geometric dimensions, however, in these examples, the use element is with respect to the sizes of 1.0. In U.S. patent No.4337178 in which the proposed cylindrical ceramic elements as carriers of the catalyst, there is also no guidance on the specific preferred ratios of the geometric dimensions, but these examples use the elements with respect to the geometric dimensions 2.11.

Summary of invention

In accordance with the first aspect of the present invention offers a ceramic element of the nozzle. The nozzle element has an axis of symmetry in the direction of the length (L) of the element and the largest size (D)perpendicular to the length and defines the diameter of the element, and the ratio of the diameter to the length is from 2.7 to 4.5. The element has a polygonal cross-section having six sides, and is equipped with a number of internal partitions forming multiple identical passages through the element, with each of the passages has a triangular cross-section.

The preferred ratio of the diameter D to the length L may range from 3.0 to 4.4, most preferred from 3.5 to 4.

The number of times the element may be at least 20, preferably more than 50. It makes sense that they have the same length.

Along the symmetry axis of the element can be formed Central, wider passage, the volume of which may exceed that of other prog the Dov at least 2, preferably 4 times.

Each of the partitions crosses at least two other partitions in a location with a shift along the length of the partitions and their ends are connected with the inner surface of the element.

The invention also covers methods of heat from the stream of fluid and the ways in which mass transfer, characterized by passing the thread through many of the elements of a nozzle made in accordance with the present invention.

Brief description of drawings

Figure 1 shows a perspective view of the nozzle element in accordance with the present invention, when considering the bottom side, opposite one of the angles.

Figure 2 shows a top view of the same element, which is shown in figure 1.

Figure 3 shows a graph of the percentage of heat recovery in function of the ratio of the geometric dimensions of the elements.

Figure 4 shows a graph of the percentage of heat recovery as a function of gas flow velocity.

Figure 5 shows a top view of the element located on the axis of a wider channel.

A detailed description of the preferred variant of the invention

These and other features of the invention will be more apparent from the subsequent detailed description, given as an example having no limiting character and described with reference to the accompanying drawings.

Ceramic is the ways in accordance with the present invention can be made of any suitable ceramic material, such as various types of natural or synthetic clay, Neolithic, cordierite, alumina, zirconium dioxide, silica or mixtures thereof. The composition of the ceramic material may be mixed with binders, additives for improving extrusion, pore formers, lubricants, etc. introduced in order to facilitate the extrusion process and/or create the desired porosity or surface area for the intended application.

The elements can be used in the processes of heat and mass transfer or as bases (carriers), which cause catalyst compounds. The elements are especially suitable for heat transfer processes involving the recovery of heat from the flow of hot gases. One example of such application is the use of regenerative heat exchangers used at facilities, the task of which is the burning of any combustible material from a stream of exhaust gas. In such regenerative heat exchangers for efficient operation it is vital that the heat flow of the exhaust gas was used to heat the incoming exhaust gas destined for processing, so as to minimize the cost of fuel needed for combustion of combustible material. In accordance with the present invention before Agueda optimization of the design element nozzles for this task.

The process of mass includes the mass transfer in the form of one or more components between the fluid and ceramic elements, such as the removal of gas components such as sulfur dioxide, from the current gas flow. An important application of mass transfer to the ceramic elements is used in absorption columns installations for the production of sulphuric acid.

However, the elements can successfully be used in all other cases, when the surface area is an important factor in the efficiency with which elements carry out their tasks.

In some cases, it is preferable that the element was located along the axis of the hole. This opening may be of any desirable form, but should not be overly break barriers patterns that may occur due to the removal of the partitions separating some of the channels, and due to the formation of a wider United channel.

Design in accordance with the present invention is hexagonal, in which each pair of opposite corners connected with one of the partitions and side walls on each side that connects the hand, occurring in opposite corners. The overall effect is the creation of a set of triangular passages through cell battery (included) is t, each of which has the same dimensions. The elements of this design is shown in figure 1-2.

Also preferred is an element with a broader located along the axis of the passage shown in figure 5. This element is based on the construction of the element shown in figures 1 and 2, and has six triangular passes around an axis, which are combined to create a broader located along the axis of the passage 5.

In the drawings shows a nozzle 1 with hexagonal limiting structure 2. Many partition 3 divides the interior space into many identical triangular passages 4, passing through the element. The element has a length L along the axis of symmetry, and the maximum size of D perpendicular to the axis of symmetry. In the drawings shows the ratio of D:L to about 4. The axis of symmetry can go in the direction of extrusion structure.

In order to show the importance of relationship D:L, were prepared ceramic elements with the same dimension D, but with three different sizes of L. These elements were placed in the tube through which was passed a gas stream having a temperature of 1500°F (815.6°C), with the speed of 207 feet per second (74.8 m/sec). We measured the percentage of heat energy in the stream recovered through contact with a nozzle of the above elements, the relationship of the geometric dimensions. Re ulitity shown in figure 3.

Then for each of these three elements, they found the percentage of recovered thermal energy as a function of gas velocity. The results are shown in figure 4. From these graphs it is easy to understand that there is a peak in the percentage of recovered thermal energy with respect to the geometric dimensions between approximately 2.7 and 4.5 and in particular approximately between 3.0 and 4.4, and this peak exists at all tested velocities of gas flow.

This result is quite unexpected, since there are no known publications on this subject. This result is also very important, as it allows to recover the maximum amount of thermal energy for each pass through the elements.

Preferential treatment of D:L also detected for the process of mass transfer.

1. Ceramic element nozzle with the axis of symmetry in the direction of the length (L) of the element, characterized in that the ratio of the largest dimension perpendicular to the length and defines the diameter of element (D), the length L ranges from 2.7 to 4.5, when this element has a polygonal cross-section having six sides, and is equipped with a number of internal partitions forming multiple identical passages through the element, each of which has a triangular cross-section.

2. Ceramic nozzle element according to claim 1, ex is different, however, what is the ratio of the diameter to the length is from 3.0 to 4.4.

3. Ceramic nozzle element according to claim 2, characterized in that the ratio of the diameter to the length is from 3.5 to 4.0.

4. Ceramic nozzle element according to one of claims 1 to 3, characterized in that each of the passages has the same length.

5. Ceramic nozzle element according to claim 4, characterized in that it has at least twenty passages.

6. Ceramic nozzle element according to claim 5, characterized in that it has at least fifty passes.

7. Ceramic nozzle element according to claim 4, characterized in that each of the multiple partitions crosses at least two other partitions in locations with a shift along the length of the partitions.

8. Ceramic nozzle element according to claim 1, characterized in that by combining many of the passages formed by walls which surround the axis of symmetry, is formed wider axial passage.

9. Ceramic element nozzle of claim 8, characterized in that the wider the axial passage has a volume that is at least 2 times the amount of other passages.

10. Ceramic nozzle element according to claim 9, characterized in that the wider the axial passage has a volume that is at least 4 times the amount of other passages.

11. Ceramic nozzle element according to claim 1, distinguishing the I, what it is made of a ceramic material selected from the group comprising various types of natural clay and synthetic clay, alumina, reality, cordierite, zirconium dioxide, silica or mixtures thereof.

12. Ceramic nozzle element according to claim 4, characterized in that all partitions in the element nozzles have first and second ends that are connected with the inner surface of the element.

13. Method of heat from a stream of fluid, comprising the following operations:

the transmission of a stream of fluid through a lot of ceramic items nozzle, while the elements of the nozzle absorb heat from the flow of fluid, and each nozzle has an axis of symmetry in the direction of the length (L) of the element, and the ratio of the largest dimension perpendicular to the length and defines the diameter of element (D), the length L is between 2.7 to 4.5, where each element has a polygonal cross-section having six sides, equipped with a variety of internal partitions forming multiple identical passages through the element, each of which has a triangular cross-section.

14. The method of mass transfer, which includes the following: the transmission of a stream of fluid through a lot of ceramic items nozzle, while the elements of the nozzle absorb one or more components of the eye fluid, moreover, each nozzle has an axis of symmetry in the direction of the length (L) of the element, and the ratio of the largest dimension perpendicular to the length and defines the diameter of element (D), the length L is between 2.7 to 4.5, where each element has a polygonal cross-section having six sides, equipped with a variety of internal partitions forming multiple identical passages through the element, each of which has a triangular cross-section.

15. The method of mass transfer through 14, in which the absorbed component contains sulfur dioxide.



 

Same patents:

FIELD: production of ceramic elements for packing.

SUBSTANCE: ceramic element (1, 6, 8) for packing is used as limiter for layers; it is made in form of bow-tie and has constant cross section along axis (1) and many through passages (5) which are parallel to direction of length (L). Proposed method consists in extrusion of mixture which contains one or several ceramic-forming components, sectionalizing of extruded mixture for forming sections and burning of sections for forming packing element. Packing is used for filling the columns where mass-transfer and heat-transfer processes are carried out.

EFFECT: enhanced efficiency.

15 cl, 6 dwg

Packed scrubber // 2279905

FIELD: chemical industry; textile industry; food industry; light industry; other industries ; equipment of the wet dust separation.

SUBSTANCE: the invention is pertaining to the equipment of the wet dust separation and may be used in chemical, textile, food, light and other industries for purification of the dusty gases. The packed scrubber contains: the body with the fitting pipes for the dusty gas and the purified gas; the sprinkling device; the support gratings, between which there is the head; and the device for withdrawal of the slime. The head is made in the form of the hollow spheres, on the spherical surface of which there is the cut groove having in the cross-section perpendicular to the screw line the profile of "Berly saddle" or "Itallocks" saddle. The head can be made out of the porous polymeric materials, the glass, the porous rubber, the composite materials, timber, stainless steel, titanium alloys, precious metals. The technical result of the invention is the increased efficiency and reliability of the dust-catching process, and also reduction of the metal consumption and the vibroacoustic activity of the apparatus as a whole.

EFFECT: the invention ensures the increased efficiency and reliability of the dust-catching process, reduction of the metal consumption and the vibroacoustic activity of the apparatus as a whole.

3 cl, 4 dwg

FIELD: chemical or physical processes.

SUBSTANCE: catalytic nozzle comprises central cord of the core of the fiber members made of polymeric fiber, e.g. capron, whose diameter exceeds the diameter of individual fiber members by a factor of two. Several fiber members of the nozzle are modified by catalyzers. The ratio of the modified and non-modified fibers is 1:2. The thrown fibers are primarily wound on the central cord, and then the noncorroding metallic cords are wound over the thrown fibers.

EFFECT: enhanced reliability.

1 cl, 1 dwg

The invention relates to contact devices for mass transfer processes between the two phases and can find application in the petroleum, chemical, gas, etc

Absorption tower // 2240976
The invention relates to a structural design of absorption tower, used in the manufacture of sulfuric acid in the stages of drying air or gas from moisture and absorption of the sulfur trioxide from the gas mixture

The invention relates to a cap of heat and mass transfer devices and can be used in chemical, petrochemical and other industries for carrying out processes of distillation, absorption, etc

The invention relates to structures of bulk packings for mass transfer devices and can be used in oil refining, petrochemical, gas, chemical, food and other industries

The invention relates to structures of bulk packings for mass transfer apparatuses

The invention relates to nozzles of heat and mass transfer devices for gas (vapor) - liquid and can be used in column apparatus for carrying out processes of absorption, desorption, rectification and dehydration or purifying gases in the chemical, gas, petrochemical and allied industries

FIELD: chemical or physical processes.

SUBSTANCE: catalytic nozzle comprises central cord of the core of the fiber members made of polymeric fiber, e.g. capron, whose diameter exceeds the diameter of individual fiber members by a factor of two. Several fiber members of the nozzle are modified by catalyzers. The ratio of the modified and non-modified fibers is 1:2. The thrown fibers are primarily wound on the central cord, and then the noncorroding metallic cords are wound over the thrown fibers.

EFFECT: enhanced reliability.

1 cl, 1 dwg

Packed scrubber // 2279905

FIELD: chemical industry; textile industry; food industry; light industry; other industries ; equipment of the wet dust separation.

SUBSTANCE: the invention is pertaining to the equipment of the wet dust separation and may be used in chemical, textile, food, light and other industries for purification of the dusty gases. The packed scrubber contains: the body with the fitting pipes for the dusty gas and the purified gas; the sprinkling device; the support gratings, between which there is the head; and the device for withdrawal of the slime. The head is made in the form of the hollow spheres, on the spherical surface of which there is the cut groove having in the cross-section perpendicular to the screw line the profile of "Berly saddle" or "Itallocks" saddle. The head can be made out of the porous polymeric materials, the glass, the porous rubber, the composite materials, timber, stainless steel, titanium alloys, precious metals. The technical result of the invention is the increased efficiency and reliability of the dust-catching process, and also reduction of the metal consumption and the vibroacoustic activity of the apparatus as a whole.

EFFECT: the invention ensures the increased efficiency and reliability of the dust-catching process, reduction of the metal consumption and the vibroacoustic activity of the apparatus as a whole.

3 cl, 4 dwg

FIELD: production of ceramic elements for packing.

SUBSTANCE: ceramic element (1, 6, 8) for packing is used as limiter for layers; it is made in form of bow-tie and has constant cross section along axis (1) and many through passages (5) which are parallel to direction of length (L). Proposed method consists in extrusion of mixture which contains one or several ceramic-forming components, sectionalizing of extruded mixture for forming sections and burning of sections for forming packing element. Packing is used for filling the columns where mass-transfer and heat-transfer processes are carried out.

EFFECT: enhanced efficiency.

15 cl, 6 dwg

FIELD: forming of elements for dumped packing used for filling columns for mass- and heat-exchange processes.

SUBSTANCE: axis of symmetry of proposed element lies in way of its length. Ratio of largest size perpendicular to length and defining diameter (D) of element to length (L) ranges from 2.7 to 4.5. Element has polygonal cross section with six sides and many internal partitions forming passages at triangular cross section.

EFFECT: possibility of obtaining optimal working parameters.

15 cl, 5 dwg

FIELD: chemical industry; other industries; production of the heads for the heat-mass-exchanging apparatuses.

SUBSTANCE: the invention is pertaining to the devices of heat-mass-exchanging apparatuses with the fluidized three-phase layer and may be used in chemical industry and other industries at purification of the gas bursts of the harmful gaseous components. The head for the heat-mass-exchanging apparatuses is made in the form of the torus produced out of the cylindrical component made out of the synthetic filaments by its twisting from one or two ends. The cylinder is made out of the longitudinal filaments fasten among themselves in the staggered order with formation of the longitudinal cells. At that the diameter of the head exceeds its height in 1.25-1.33 times, and the ratio of the cell height to the diameter of the head makes 0.25-0.3. At utilization of the head the gas-liquid layer is uniformly distributed in the operation volume of the apparatus, that predetermines the stable hydrodynamic situation. At that the mass exchanging process is intensified due to the highly developed surface and the strong turbulization of the gas-liquid layer.

EFFECT: the invention ensures the gas-liquid layer uniform distribution in the operation volume of the apparatus, the stable hydrodynamic situation, intensification of the mass-exchange process.

4 dwg

FIELD: chemical engineering.

SUBSTANCE: invention relates to design of fill0in heads for mass transfer apparatuses and it car be used in heat-mass transfer processes in liquid-vapor(gas) systems, for instance at rectification, absorption, desorption, distillation a dn other processes. Proposed head member for mass transfer apparatuses has cut elements curved to circle of side surface. According to invention, head member is made in form of parallel cylinders formed by cut elements arranged in rod height, curved to circle in turn, inside and outside. Cylinders are connected by bridges and are arranged relative to each other so that their diametral planes from side surface of regular polygonal prism.

EFFECT: increased efficiency of heat-mass transfer by increasing surface of phase contact owing to reduction of drop formation and uniform distribution of phase surface in volume of heat-mass transfer apparatus.

3 dwg

FIELD: chemical industry.

SUBSTANCE: method comprises mixing gas with a portion of the circulating gas-liquid mixture, bringing the mixture produced in a contact with the finally dispersed drops in the first stage and with liquid condensed on the nozzle members in the second stage, pumping the main portion of the gas-liquid mixture through the pipes to the top layer of the liquid, and entraining the remainder portion by means of vortex funnels toward the bottom liquid layer in the third stage. A portion of the mixture is directed to the recirculation, and the remainder portion is forced to contact with the drops of circulating liquid in the fourth stage. The final contact is produced in series in the nozzle chamber of the fifth stage, aeration towers, and bubbling chambers of the sixth stage. The sprinkling chamber of the first stage receives acoustic ultrasonic disperser provided with longitudinal ultrasonic wave ducts. The sprinkling chamber of the fourth stage receives the deflecting shields with a diameter of 30-80 mm made of interconnected cylinders of different diameters. The cylinders have longitudinal cuts from the bottom cylinder to the top cylinder and additional cuts in the cylinders. The members for charging the nozzle chambers in the second and fifth stages are made of balls with a diameter of 20-70 mm provided with six-nine hollows in the spherical surface whose axes intersect at the ball center. The thickness of the walls between the hollows decreases toward the ball center.

EFFECT: enhanced efficiency.

5 cl, 6 dwg

Packed column // 2310504

FIELD: chemical industry; petrochemical industry; oil-refining industry; oil-processing industry; gas-processing industry; metallurgical industry; by-product-coking industry; environmental protection; production and operation of the packed mass-exchange apparatuses for the "gas-liquid" systems.

SUBSTANCE: the invention is pertaining to the packed mass-exchange apparatuses for the "gas-liquid" systems and may find application in chemical, petrochemical, oil-and gas-processing industries, metallurgical industry and the by-product-coking industry, and also in the industrial ecology at purification of the flue gases and the ventilation emissions. The packed column contains the cylindrical body and the head made in the form of the multi-row located in it rings, the lateral surface of the rings of the head is bent along the circumference with R=0.08-0.1 m. The rings are vertically installed with the shift in the rows of the convex side towards the axis of the body of the packed column in such a manner, that the upper protruding edge of each ring of the lower row number is located inside the ring of the upper row. The technical result of the invention is the increased degree of the purification of the gases at the expense of intensification of the process of the mass-exchange between the gas and the liquid.

EFFECT: the invention ensures the increased degree of the purification of gases at the expense of intensification of the mass-exchange process between the gas and the liquid.

2 dwg

FIELD: catalysts.

SUBSTANCE: invention relates to novel catalyst fillings containing physical mixture of catalytically active and catalytically inactive molded particles wherein catalytically inactive molded particles have rounded edges on their friction surfaces.

EFFECT: reduced mechanical wear inside catalytic filling and preserved low pressure drop over the filling.

2 cl

FIELD: engines and pumps; chemistry.

SUBSTANCE: reactor system comprises reactor tube, which contains compressed layer of molded carrier material, which may include catalytic component. Molded carrier material, for instance, aluminium oxide, has geometric configuration of hollow cylinder. Catalyst contains silver. Hollow cylinder has ratio of rated length to rated external diameter from 0.5 to 2, and ratio of rated external diameter to rated internal diameter, which exceeds 2.7. Reactor system also has such combinations of reactor tube diameter and geometric parameters of molded catalyst carrier, which make it possible to produce compressed layer of catalyst in reaction system with high density of package with minimum pressure drop via compressed layer of catalyst.

EFFECT: higher efficiency.

21 cl, 7 dwg, 3 tbl, 7 ex

Up!