Device for collecting and removing particles

 

(57) Abstract:

Device for the separation of particles in the flue gas generated in the combustion furnace, contains many separators - concave reflective elements are U-shaped, E-shaped, W-shaped or other structures located within or after the furnace in the direction of travel of the combustion gases. U-shaped beam separators have many rows. Each separator in the series set in relation to the adjacent U-shaped separator in the same row with a gap. U-shaped separators in at least one posleduuschem series have against gaps between the U-shaped separators in the previous row. The greater the distance between a part or all of the series improves the efficiency of separation of particles from the flue gas by increasing the time and distance that must be overcome by the gas flow and to slow down before the collision with the next adjacent U-shaped separators. The greater the distance between a part or all of the rows arranged along the direction of flow of the combustion gas at least equal to the distance equal to the concavity or the depth of a separate U-shaped separator. 13 C.p. f-crystals, 10 ill.

The invention relates, glavnye, formed in the combustion furnace.

In the combustion furnace, circulating fire-tube boilers and/or reactors use separators particles acting on the principle of internal collisions, which can also be defined as a concave reflecting elements, or U-shaped beams, for the selection and removal of particles in the combustion gases. Separators of this type are described, for example, in patents US 4891052, class B 01 D 45/00, 1990 and US 5343830, class B 01 D 45/00, 1995.

Usually in each furnace use an array of U-shaped beams for the separation of particles from the flue gas. The combustion gases pass through the furnace and the block U-shaped beams and, as speed increases, the gas-dust mixture, the efficiency of the allocation of particles U-shaped beams is reduced.

The closest analogue of the invention is a device for selecting and removing particles entrained flue gas in the furnace, containing a lot of U-shaped separators (U-beams), with a length, width and depth, placed in the direction of travel of the combustion gases in the furnace according to patent US 4992085, class B 01 D 45/00, 1992. The separators are at least two rows, with gaps between them, allowing a certain number of particles in the flue gas to avoid capture. Separators in ka is between adjacent U-shaped beams in the row overlap one U-shaped beam in an adjacent row 5 - 15% of the value. The distance (C) between adjacent rows is 50 - 75% of the value of A.

Object of the invention is a device for the selection and removal of particles with greater efficiency and less cost than other known systems and devices.

The problem is solved due to the fact that in the known device for the selection and removal of particles entrained flue gas in the furnace, containing a number of separators having a length, width, and depth, placed in the direction of the gas in the furnace, located in at least two rows on the path of the combustion gases with the gaps between the separators for a certain number of particles in the flue gas to avoid capture, and the separators in each subsequent row are located between the separators in each of the previous row separators are located at or beyond the furnace, and at least one subsequent series of separators is from the previous one by a distance equal to the depth separators

Separators are concave reflecting elements, operating on the principle of collision, and can be U-shaped, E-shaped, W-shaped, or any other similar concave design.

In particular, Vaughn is the CTL, coming from the walls, forming the collection area of the particles.

In particular, if you run the furnace is part of a boiler with a circulating fluidized bed.

The location of many separators in or after the furnace in the direction of travel of the combustion gases may be as follows:

of the many separators form the first group, containing at least one number, the part is formed by a second group containing at least one row following the first row separators, and at least one row of separators in the second group is from the previous row separators in the first group at a distance at least equal to the depth of the separator.

of the many separators form the first group, containing at least one number, the part is formed by a second group containing at least one row following the first row separators, and at least one row of separators in the first group is from the previous row of cages at a distance at least equal to the depth of the separator.

of the many separators form the first group, containing at least one number, the part is formed by a second group containing at least one row, the next for PE is and separators, at a distance at least equal to the depth of the separator.

of the many separators form the first group, containing at least one number, the part is formed by a second group containing at least one row following the first row separators, and each group separators contains the same number of rows;

of the many separators form the first group, containing at least one number, the part is formed by a second group containing at least one row following the first row of separators, and the first group of separators contains more rows than the second group;

of the many separators form the first group, containing at least one number, the part is formed by a second group containing at least one row following the first row of separators, and the second group separators contains more rows than the first group;

of the many separators form the first group, containing at least one number, the part is formed by a second group containing at least one row following the first row separators, and each subsequent row of separators is from the previous row on the distance kr is Yu at least one row, part form a second group containing at least one row of cages, next to the first number of separators, and the second group is from the first group by a distance at least equal to the depth of the separator.

part IV sets separators form the first group, containing at least one number, the part is formed by a second group containing at least one row of cages, next to the first number of separators, and the second group is from the first group at a distance greater than the depth of the separator.

New increased distance between at least some rows of separators improves the efficiency particulate from flue gas due to the increased interval of time and distance for the passage of flue gas, to reduce the speed before the "crash" followed by a number of separators.

The accompanying drawings illustrate preferred embodiments of the present invention.

In Fig.1 shows a perspective view of two concave reflecting elements (U-beams);

In Fig.2A is a side view in section of the separator particles, acting on the principle of collision;

in Fig.2B is a top view of recipe collision;

in Fig.3B is a top view in section of the device of Fig.3A;

in Fig.4 is a top view in section of the separator particles, which shows the positions and designations that define the design;

in Fig.5 is a top view of the particle separator of Fig.4;

in Fig.6 is a top view in section of a variant of implementation of the invention with increased gaps between at least two consecutive rows of separators;

in Fig. 7 is a top view in section of a second variant implementation of the present invention;

in Fig.8 is a top view in section of a third variant of implementation of the present invention;

in Fig.9 is a top view in section of a fourth variant of execution of the invention;

in Fig.10 is a top view in section of a fifth variant of execution of the invention.

In all the drawings the same positions denoted by the same or perform similar functions to the elements.

The term "U-shaped beam is used in the present invention for convenience, this term is understood in the broad sense of any type of concave reflective elements - separators operating on the principle of collision. Can be used elements of various forms.

In Fig. 1 depicts a block consisting of two U-obese combustion in the furnace, the set of such U-shaped beams 10 have a width and depth of the furnace in the direction of the flue gases. Each concave reflective element or U-shaped beam 10 are 2 shelves, mating with the wall 4, and they form a concave surface 6 for the selection and removal of particles from the flue gas 8.

In Fig.2,A and 2,B shows the installation that contains many U-shaped beams, which are located at least in one row, and preferably in two or more rows of 12 placed in the upper part of the furnace or reactor 14 and/or in the direction of the flue gases 8. The rows of U-shaped beams 12 can form a single-stage separator, behind which is located a chimney or heating surface (not shown).

Series 12 U-beams 10 form a group (16), after which the direction of flow of the flue gases placed rows of 12 U-beams 10 of the other group 20, as shown in Fig. 3,A and 3,b

In Fig. 4 shows a specific gaps between the U-shaped beams. A - the distance or gap between adjacent U-abranyi beams 10 in the row 12. B - overlap of one U-shaped beam 10 in the first row 12 a distance A in the next row 12. C - the distance between adjacent rows 12. E - the depth of a separate population of particles from a stream of flue gas 8.

In Fig. 6 shows an embodiment of the present invention, in which the U-shaped beams are placed differently in accordance with the principles of the present invention.

As shown and explained in Fig.6, the set of rows 12 are offset in a staggered U-beams 10. The gap between A U-shaped beams in the previous row 12 usually coincide with the separators 10 in the subsequent row 12, created a greater clearance C' between at least two consecutive rows of 12 than was previously used devices. It was found that these large gaps C' between adjacent rows 12 provide a more effective selection, collection and removal of particles from the flue gas 8. In the device shown in Fig. 6, all four series of U-shaped beams 10 is placed with the increased gap' between rows. More specifically, each row 12 is separated from adjacent rows by a distance', which is at least equal to the depth of the concavity of E, or the height of this U-shaped beams, i.e., roughly speaking, the width of the shelves 2 U-shaped beams 10. The gap' between rows provides the most efficient selection particles for a given furnace device.

Speed gas furnace 8, the right to the series of 12 U-shaped beams 1 is according to the present invention, provides a significant reduction in speed gas furnace 8, the incident on U-shaped beams in each subsequent row 12, located behind the first row 12, so as accelerated flows of gas-dust mixture of flue gas 8 given more time and space to slow down the movement before collision with following number 12 in the direction of flow.

The decrease in the rate of gas-dust mixture of flue gas 8 when the charge on each subsequent row 12 of the U-beams 10 creates a number of advantages, U-shaped beams have less impact on the speed of the gas, which reduces the tendency of blowing particles Yves internal space of the U-shaped beams 10 in any row 12, located behind the first row 12. The reduction of the effective speed of the gas-dust mixture of flue gas 8 leads to lower impact forces, perceived U-shaped beams 10. In addition, the reduction of the effective speed of the gas-dust mixture of flue gas 8 helps to reduce the potential erosion of the U-beams 10. The device, made in accordance with the present invention, allows you to create a more uniform distribution of the gas stream across the width of the rows, which increases effectivelystate the trajectory of the gas streams.

The reduction of the effective speed gas furnace 8, included in the rows 12 of the U-beams 10, following behind the first line 2, leads to higher collection efficiency of particles at a given normal velocity of the gas. The present invention allows to operate the U-shaped beam 10 at a higher nominal gas velocities than those from the existing combustion devices, which, in turn, allows the use of more compact U-shaped beams 10 in furnaces greater depth without increasing the length of the U-beams 10.

The separator of U-shaped beams, made in accordance with the present invention has about the same or slightly lower collection efficiency of the particles, and this known separator device, but at a higher nominal gas velocities. At the same speed gas furnace 8 of the present invention allows to achieve a higher collection efficiency of particles than the known device.

Fig. 7 to 10 show that the essential features of the present invention can be used in various devices, some of them can be combined clearances used in previously known devices, which is La limit the scope of the invention. Fig. 7 illustrates a device in which the rows 12 of the U-beams 10 can be grouped into several groups 28, where the rows of 12 in each group 28 is placed at a distance C' from each other (C-gap, used in previously known devices), and each group 28 is located at a distance C' from the subsequent group 28. Although in Fig.7 shows three such groups 28, each of which contains two rows of 12, it should be borne in mind that each group 28 may contain fewer or more rows 12 and that in each group 28 need not be the same with the other number of rows, but between one group 28 and the next group 28 is the interval C' of greater magnitude In Fig.8 shows a device containing two groups 28, each of which contains four rows of U-shaped beams 10. The gaps between the elements, among other factors, determine the exact form of such device, which is necessary for practical application of the invention.

Other devices containing U-shaped beams, shown in Fig.9 and 10, which illustrate the fact that each group of U-shaped beams 10 may include a different number of rows 12 and between the rows may be a different combination of the distances C and C'. These devices are particularly suitable for reactors is the first movement of the gas stream and subsequent groups 30 and 32, respectively, return the collected particles back into the lower part of the casing of the reactor in various ways. If you need even more distance F may be required between the first while moving gas group 30 and the subsequent group 32 for placement of other structures, such as columns supporting the casing of the furnace, or heated surface (not shown), which must be located between these groups 30 and 32.

Thus, it is obvious that the specific use cases of the invention shown and described in detail, in order to illustrate possible applications of the principles of the invention, it should be borne in mind that the invention may be implemented in other embodiments without departure from these principles.

1. Device for selecting and removing particles entrained flue gas in the furnace, containing a number of separators having a length, width, and depth, placed in the direction of the gas in the furnace, located at least two rows on the path of the combustion gases with the gaps between the separators for a certain number of particles in the flue gas to avoid capture, and the separators in each subsequent row are located between the separators in each preds is the number of separators is from the previous distance, equal to the depth of the separator.

2. The device under item 1, characterized in that the separators are concave reflecting elements, operating on the principle of collision.

3. The device according to p. 2, characterized in that the concave reflecting elements are U-shaped, E-shaped, W-shaped, or any other similar concave design.

4. The device under item 1, characterized in that the concave reflective elements, operating on the principle of collision, are U-obronie beams having shelves coming from the wall, forming the collection area of the particles.

5. The device under item 1, characterized in that the furnace is part of a boiler with a circulating fluidized bed.

6. The device under item 1, characterized in that the part of many separators located at or after the furnace in the direction of the flue gas, forming a first group containing at least one number, the part forms a second group containing at least one row following the first row separators, and at least one row of separators in the second group is from the previous row separators in the first group at a distance at least equal to the depth of the separator.

7. Estrogene flue gas, form the first group, containing at least one number, the part is formed by a group containing at least one row following the first row separators, and at least one row of separators in the first group is from the previous row of cages at a distance at least equal to the depth of the separator.

8. The device under item 1, characterized in that the part of many separators located at or after the furnace in the direction of travel of the combustion gases, form the first group, containing at least one number, the part is formed by a second group containing at least one row following the first row separators, and at least one row of separators in the second group is from the previous row of cages at a distance at least equal to the depth of the separator.

9. The device under item 1, characterized in that the part of many separators located at or after the furnace trek the motion of the combustion gases, form the first group, containing at least one number, the part is formed by a second group containing at least one row following the first row separators, and each group separators contains the same number of rows.

10. Ustroyeniya flue gas, form the first group of separators that contain at least one number, the part is formed by a second group containing at least one row following the first row of separators, and the first group of separators contains more rows than the second group.

11. The device under item 1, characterized in that the part of many separators located at or after the furnace in the direction of travel of the combustion gases, form the first group, containing at least one number, the part is formed by a second group containing at least one row following the first row of separators, and the second group separators contains more rows than the first group.

12. The device under item 1, characterized in that the part of many separators located at or after the furnace in the direction of travel of the combustion gases, form the first group, containing at least one row portion to form a second group containing at least one row following the first row separators, and each subsequent row of separators is from the previous row of cages at a distance at least equal to the depth of the separator.

13. The device under item 1, characterized in that the part of many separational least one row, part form a second group containing at least one row following the first row of separators, and the second group is from the first group, at a distance at least equal to the depth of the separator.

14. The device under item 1, characterized in that the part of many separators located at or after the furnace in the direction of travel of the combustion gases, form the first group, containing at least one number, the part is formed by a second group containing at least one row following the first row of separators, and the second group is from the first group at a distance greater than the depth of the separator.

 

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