RU2346201C2 - Condensate withdrawing device - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to devices for withdrawing condensate from vapour-consuming equipment. Condensate withdrawing device comprises a vertical housing with mounted in its upper part tangential inlet connection pipe for gas-and-vapour-containing condensate, outlet connection pipe for gas or vapour removal and outlet connection pipe for the condensate removal. It is fitted with a hollow cylinder from porous hydrophobic material which is set in the inner housing cavity so that annular space is present between the inner housing wall and the outer cylinder surface. A funnel is mounted under the hollow cylinder, it is equipped with a nozzle and vertical plates for the condensate rotation suppression which are set on its inner tapered surface. The outlet connection pipe for the condensate withdrawal is located in the housing at the level of the funnel tapered part. Porous ceramics which is hydrophobisated by, for example, organic silicon compound is chosen as the porous hydrophobic material. Additionally the hollow cylinder bottom is fitted with a nozzle placed inside the funnel with the nozzle connected to it in order to prevent secondary removal of drops from the hollow cylinder inner volume.

EFFECT: increasing operational reliability of the condensate withdrawing device due to designing a device for the separation of vapour and gas from the condensate which is free from moving parts.

4 cl, 3 dwg

Description

The invention relates to energy-saving equipment used in energy, chemical, food and other industries, namely, devices for draining condensate from steam-consuming equipment.

Known steam trap containing a vertical housing with longitudinal ribs installed in the upper part of the housing a tangential inlet and outlet for gas and steam nozzles, a nozzle for draining condensate in the bottom, a conical float located in the housing, interacting with a cone with an outlet nozzle for gas and steam and the lower end with condensate drain pipe. A sleeve with radial grooves is installed in the bottom for condensate drainage, and the float is equipped with a rod attached to the lower end, located in the condensate drain pipe and made with a cross section stepwise decreasing in the direction of the mentioned pipe (see the description of RF patent No. 13225246, IPC (4 ) F16T 1/22 dated 11/05/1985).

The closest in technical essence is a steam trap containing a vertical casing with longitudinal ribs on the inner surface, tangential inlet and outlet pipes for gas or steam installed in the upper part of the casing, a condensate drain pipe in the casing bottom, a conical float placed in the casing interacting with the cone with an inlet pipe for gas or steam, and a lower end with a stepwise decreasing rod with a pipe for condensate discharge, on which a sleeve with radial basics. A sleeve with radial grooves is made of bimetal, and curved grooves are made on the inner surface of the radial grooves (see the description of the RF patent No. 2238473, IPC (7) F16T 1/22 of 03/17/2003).

The disadvantages of the known design include its complexity due to the presence of many components, including moving parts, and the insufficient degree of separation of the gas-vapor phase from the condensate, and this reduces the operational reliability of the steam trap.

The technical problem to which the invention is directed is to increase the operational reliability of a steam trap by creating a structure for separating steam and gas from a condensate that does not contain moving parts.

The specified technical result is achieved due to the fact that in the known steam trap containing a vertical housing with a tangential inlet fitting for gas-vapor condensate installed in its upper part, an outlet fitting for exhausting gas or steam and an outlet fitting for draining the condensate, it is equipped with a hollow cylinder made of porous hydrophobic material, which is located in the inner cavity of the housing so that between the inner wall of the housing and the outer surface of the cylinder an annular space is formed o, wherein the hollow cylinder is placed under the funnel with a nozzle and vertical plates to quench condensate of rotation disposed at its inner conical surface. The outlet nozzle for condensate drain is located in the housing at the level of the conical part of the funnel. Porous ceramics hydrophobized, for example, with an organosilicon compound, were selected as a porous hydrophobic material. In addition, to prevent secondary droplet drop from the internal volume of the hollow cylinder, it has a bottom with a pipe, which is placed inside the funnel with a pipe attached to it.

The inventive steam trap is illustrated by drawings, where:

in Fig 1. - shows a frontal section of a General view of a steam trap;

figure 2 is a transverse section aa of the steam trap along the axis of the inlet fitting;

figure 3 is a transverse section bB of the steam trap along the axis of the outlet fitting.

The steam trap contains a cylindrical vertical housing 1, with a tangential inlet fitting 2 installed in the upper part, an outlet fitting 3 for venting steam or gas, and an outlet nozzle 4 for draining the condensate. In the inner cavity of the housing 1, a hollow cylinder 5 is installed, made of a porous hydrophobic material. A funnel 6 is located in the lower part of the housing 1, separating its internal cavity, and with a pipe 7 coaxial to it, directed to its bottom. On the inner conical part of the funnel 6 placed vertically arranged plate 8 for damping the rotation of the condensate stream. The hollow cylinder 5 has a bottom 9 with a pipe 10 located inside the funnel 6, and a pipe 7 connected to it

The steam trap operates as follows.

A gas-vapor condensate stream is fed through a tangential inlet fitting 2 into the cavity of the housing 1, where, under the action of inertial, centrifugal and gravitational forces, it acquires a spiral-shaped motion, rotating in the annular space between the cylindrical surfaces (outer hollow cylinder 5 and inner case 1), simultaneously dropping from above way down. As a result of the interaction of centrifugal and Archimedean forces for a rotating medium, the liquid phase of the flow (condensate) is squeezed to the inner surface of the housing 1, and the gaseous phase (steam and gas) is pressed to the outer surface of the hollow cylinder 5. Steam and gas are “squeezed” to the surface of the hollow cylinder 5 pass through the pores of this cylinder and are discharged from the internal cavity of the cylinder 5 through the nozzle 3. The condensate, squeezed to the inner surface of the housing 1, is lowered to the funnel 6, in which, due to the resistance of the vertical plates 8, it extinguishes its rotational motion the pressure and already without rotation descends along the pipe 7 to the bottom of the steam trap. Most of the condensate that has fallen on the outer surface of the hollow cylinder 5 due to the hydrophobic properties of its surface is deprived of the possibility of penetrating inside the cylinder through its pores, and, in the form of droplets, under the influence of gravitational forces rolls down into the funnel 8, where it mixes with the main stream of condensate. Separate tiny droplets of condensate passing through the pores of the hollow cylinder 5, in the form of small droplets, slide along the inner surface of the hollow cylinder 5 to the bottom 9 and merge through the pipe 10 into the cavity of the pipe 7, where they are also mixed with the main condensate stream.

The condensate through the gap between the lower cut of the pipe 7 and the bottom of the steam trap flows into the annular space between the outer surface of the pipe 7 and the inner surface of the housing 1. Next, the condensate rises in this ring space to the level of the outlet pipe 4 and is removed from the steam trap.

The presence of liquid columns simultaneously inside and outside the nozzle 7 forms a water lock for the vapor-gas medium and prevents the penetration of steam and gas into the condensate stream exiting through the nozzle 4.

Conducted by OOO Komos laboratory tests of the inventive steam trap showed its higher efficiency and operational reliability in comparison with the known (prototype).

Claims (4)

1. A steam trap containing a vertical housing with a tangential inlet fitting for gas-vapor condensate installed in its upper part, an outlet fitting for gas or steam removal and an outlet fitting for condensate discharge, characterized in that it is provided with a hollow cylinder made of a porous hydrophobic material located in the inner cavity of the housing so that between the inner wall of the housing and the outer surface of the cylinder an annular space is formed, and a funnel with a tube and vertical plates for damping condensate rotation, located on its inner conical surface. 2. The steam trap according to claim 1, characterized in that the outlet nozzle for condensate discharge is located in the housing at the level of the conical part of the funnel. 3. The steam trap according to claim 1, characterized in that porous ceramics hydrophobized, for example, with an organosilicon compound, are selected as the porous hydrophobic material. 4. The steam trap according to claim 1, characterized in that the hollow cylinder has a bottom with a nozzle, which is placed inside the funnel with a nozzle attached to it.

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