RU175570U1 - Inertial vacuum ash separator for flue gas cleaning - Google Patents

Abstract

Field of technology: gas purification. The inertial-vacuum ash separator contains a vertically located two-stage housing 10, the lower stage of which is an ash receiving chamber (ZPK) 11, and the upper one is designed for ash separation and is made in the form of two coaxially arranged cylindrical shells 12,13. Of these, the inner shell 12 serves as a channel 14 for supplying purified flue gases, and the annular space between two shells serves as a channel 15 for removing purified flue gases. The ash separator also contains a rotary chamber (PC) 18 in the lower part of the ash separating stage communicating the exit from channel 14 to channel 15. PC 18 is made with a perforated bottom 181, over which a cone-shaped fairing 19 is installed along the axis of the housing 10. The lateral surface of the latter together with the lower part of the inner the shell 12 forms a confuser output nozzle 20 of the channel 14. The input section 21 of the annular channel 15 is made diffuser. The height h of the fairing 19 is 0.5 ... 0.8 of the height H of the inner shell 12, and the angle α of narrowing of the confuser nozzle 20 is equal to the angle increasing the degree of efficiency β of expansion of the diffuser section 21 of the channel 15 for removal of purified gases and is α = β = (15 ... 20 ) 0. EFFECT: improved aerodynamics of the flow of the cleaned flue gases in the ash separating part of the step body of the ash separator, by increasing the degree of ash collection efficiency to 99.7%. 1 p. Fs, 2 ill.

Description

Technical field

The utility model relates to the field of gas purification and can be used in various industries for fine purification of flue gases from fine ash.

State of the art

Known accepted as the closest analogue of a utility model, an inertial vacuum ash separator for cleaning flue gases, containing:

a vertically located two-stage housing, the lower stage of which is an ash receiving chamber, and the upper one is designed for ash separation and is made in the form of two coaxially arranged cylindrical shells, of which the inner serves as a channel for supplying cleanable flue gases, and the annular space between two shells is a channel for exhausting purified flue gases;

a rotary chamber in the lower part of the ash separating stage communicating the exit from the inner shell to the specified annular space between the shells,

wherein said pivoting chamber is made with a perforated bottom on which a cone-shaped fairing is mounted along the axis of the housing,

the lateral surface of which, together with the lower part of the inner shell, forms a confuser outlet nozzle of the channel, and the inlet portion of the annular channel for removal of purified gases is diffuser (RU 92358, B01D 45/06, 2010). As tests have shown, this well-known ash separator allows the flue gas to be purified from fine ash with a degree of efficiency not exceeding 97%, which is considered insufficient by modern environmental requirements.

Utility Model Disclosure

The objective of the utility model is to increase the degree of ash collection efficiency of an ash separator of the specified known type to a value acceptable from the point of view of modern environmental requirements, and the technical result is to improve the aerodynamics of the flow of the cleaned flue gases in the ash separation part of the stepped case of the specified ash separator.

The solution of this problem by achieving the specified technical result is ensured by the fact that in an inertial vacuum ash separator for flue gas cleaning, containing a vertically located two-stage housing, the lower stage of which is an ash collecting chamber, and the upper one is designed for ash separation and is made in the form of two coaxially arranged cylindrical shells, of which the inner is used to form a channel for supplying cleaned flue gases, and the annular space between the two shells -channels and discharge cleaned flue gases; a rotary chamber in the lower part of the ash separating stage communicating the exit from the inner shell to the specified annular space between the shells,

moreover, the specified rotary chamber is made with a perforated bottom, over which a cone-shaped fairing is installed along the axis of the housing;

the lateral surface of which, together with the lower part of the inner shell, forms a confuser outlet nozzle of the channel, and the inlet portion of the annular channel for removal of purified gases is diffuser,

according to utility model

the height of the said cowling is 0.5 ... 0.8 of the height of the inner shell of the upper stage of the housing, and the narrowing angle of the specified confuser nozzle of the channel for supplying cleaned gases is equal to the expansion angle of the diffuser section of the channel for purifying gases and is (15 ... 25) °.

A causal relationship between the indicated technical result and the set of essential features of the utility model is that the geometric ratios of the fairing height, as well as the constriction and opening angles of the outlet section of the axial channel and the inlet section of the annular channel of the path of the cleaned flue gases adopted, are selected based on the results of mathematical modeling, the optimal aerodynamics of the elements of the specified path in terms of ensuring maximum e the effectiveness of the inertial separation of dispersed ash particles in the rotary chamber with minimal entrainment of them with an upward flow of purified gases.

Brief Description of the Drawings

In FIG. 1 is a schematic longitudinal sectional view of a gold miner according to a utility model; in FIG. 2 - node "A" of FIG. 1 with a larger image of the confuser and diffuser portions of the ducts of the flue gas path inside the pivot chamber.

Legend

ZPK - ash collection chamber;

PC - PTZ camera;

List of drawing items

10 - case; 11 - ZPK; 111 - ash outlet; 12, 13 - inner and outer cylindrical shells; 14 - channel for supplying cleaned flue gases; 15 - channel removal of purified flue gases; 16 - inlet pipe of the housing; 17 - outlet pipe of the housing; 18 - PC; 181 - perforated bottom of the PC; 182 - - the supporting frame of the perforated bottom of the PC; 183 - the Central sleeve of the supporting frame; 19 - fairing; 191 - guide pin fairing; 20 - output diffuser nozzle of the channel for supplying cleaned flue gases; 21 - input diffuser section of the channel for removal of purified flue gases; H is the height of the inner shell of the upper stage of the housing; h is the height of the fairing; α is the narrowing angle of the output confuser nozzle of the channel for supplying cleaned flue gases; β is the angle of expansion of the inlet diffuser section of the channel for removal of purified flue gases.

Utility Model Implementation

The inertial vacuum ash separator according to a utility model contains (Fig. 1) a vertically located two-stage housing 10, the lower stage of which is an ash receiving chamber (ZPK) 11 with an ash outlet 111, and the upper one is designed for ash separation and is made in the form of two coaxially arranged cylindrical shells 12, 13. Of these, the inner shell 12 serves to form a channel 14 for supplying cleaned flue gases, and the annular space between the two indicated shells is a channel 15 for removal of cleaned flue gases s. At the entrance to the channel 14 and at the exit from the channel 15, the housing 10 is equipped with inlet and outlet pipes 16, 17, respectively.

A rotary chamber (PC) 18 is provided in the lower part of the ash separating stage of the housing 10, communicating the exit from the inner shell (channel 14) to the annular space between the shells (channel 15). The specified PC 18 is made with a perforated bottom 181 mounted on a supporting star-shaped frame 182 with a central hub 183. Above the specified perforated bottom 18, a conical fairing 19 is installed along the axis of the housing 10, at the base of which a guide pin 191 is provided in the hole of the sleeve 182 of the supporting frame 181.

The side surface of the fairing 19 together with the lower part of the inner shell 12 forms a confuser output nozzle 20 of the channel 14, and the input section 21 of the annular channel 15 of the cleaned gases is diffuser. According to a utility model, the height h of the said cowl 19 is 0.5 ... 0.8 of the height H of the inner shell 12 of the upper stage of the housing 10, and the angle a of narrowing the specified confuser nozzle of the channel for supplying cleaned gases is equal to the angle β of expansion of the diffuser section of the channel 15 for removal of purified gases and is α = β = (15 ... 25) °.

The work of the ash separator according to the utility model is as follows. The cleaned flue gases enter through the inlet pipe 16 into the internal channel 14, at the outlet of which a confuser nozzle 20 is provided. By increasing the speed of the gas stream during its acceleration, the inertial effect on the dispersed solid ash particles contained in this stream increases correspondingly when turning the 180 ° flow in PC 18 is separated from it, falling onto the perforated bottom 181 of PC 18, from where they enter the ZPK 11 through the hole of perforation of the specified bottom and through its ash outlet 111 beats poured into the external ash removal system (not shown). Flue gases cleaned from dispersed ash particles are removed from the ash separator through an outlet pipe 17 through an annular channel 15, at the inlet of which a diffuser section 21 is provided, where the initial flue gas supply speed is restored.

At the same time, patentable linear and angular geometric ratios of the elements of the gas path of the ash separator provide high efficiency for cleaning flue gases before they are released into the environment. As tests have shown, the degree of efficiency of cleaning flue gases from dispersed ash particles up to the finest fractions is 99.7%, which corresponds to established environmental standards.

Industrial applicability

Gold separator according to the utility model meets the condition of "industrial applicability". The essence of the technical solution is disclosed in the formula, description and drawings clearly enough for understanding and industrial implementation by relevant specialists based on the current level of technology in the field of industrial gas purification.

Claims (7)

Inertial vacuum ash separator for flue gas treatment, containing: a vertically located two-stage housing, the lower stage of which is an ash collecting chamber, and the upper one is designed for ash separation and is made in the form of two coaxially arranged cylindrical shells, of which the inner one serves to form a channel for supplying cleaned flue gases, and the annular space between two shells is a channel for exhaust purified flue gases; a pivoting chamber in the lower part of the ash separating stage, communicating the exit from the inner shell to the specified annular space between the shells, moreover, the specified pivoting chamber is made with a perforated bottom, over which a cone-shaped fairing is installed along the axis of the housing, the lateral surface of which, together with the lower part of the inner shell, forms a confuser outlet nozzle of the channel, and the inlet portion of the annular channel for removal of purified gases is diffuser, characterized in that the height of the said cowling is 0.5-0.8 the height of the inner shell of the upper stage of the housing, and the narrowing angle of the specified confuser nozzle of the channel for supplying cleaned gases is equal to the angle of expansion of the diffuser section of the channel for purifying gases and is 15-25 °.

Images