RU2377045C1 - Inertial edge mud filter - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to maintenance appliances for fluid transfer pipeline networks and can be used as additional device preventing accumulation of mud in pipelines. Proposed mud filter comprises casing accommodating water feed branch pipe, purified water discharge branch pipe and drain system. Said casing houses partially perforated branch pipe connected with purified water discharge branch pipe, and represents horizontal or inclined cylinder with a hatch welded into one of its sides to inspect and repair mud filter. Damping plate is arranged below said filter. Purified water discharge branch pipe is mounted on the same side, right above casing axis, drain system first branch pipe is mounted below said axis. Water feed branch pipe is arranged on casing opposite side below casing axis and second drain branch pipe is arranged above said axis to remove floatable impurities from casing. Both pipeline and casing has at least one perforated hole closed by elliptical shirt tail. Additional drain branch pipe is arranged at casing lower part nearby aforesaid damping plate, while elliptical baffle is mounted opposite the water feed branch pipe.

EFFECT: higher efficiency.

2 cl

Description

The invention relates to the field of maintenance of pipeline networks designed for transporting liquid media, and can be used as auxiliary devices preventing the accumulation of dirt in the water supply pipelines of the heating equipment of boiler houses, heating networks, central heating units and heating units of buildings, as well as process water flows and water cycles of industrial enterprises for the effective cleaning of various technological water flows from mechanical applications her without the use of filter media.

Typical water purifiers existing in boiler houses, central heating systems and in-house heating systems, which are strainers, do not provide the necessary degree of purification of water from mechanical impurities, which leads to drift by deposits of boilers, heating systems and hot water supply. At the same time, the quality of hot water in terms of suspended solids is significantly impaired.

The developed design of the mud filter can be used to purify natural, waste, recycled and industrial waters, purify network and make-up water of central heating and hot water supply systems, pre-treat water before bulk filters at waterworks, etc.

A known design of a filter for pipelines (SU, copyright 286968), designed to remove foreign matter from the water. The known filter contains a closed cylindrical housing, filter grates and a lock gate, and the volume of the housing is divided into at least three isolated sectors by filter gratings, radically mounted on a shaft mounted along the axis of the housing.

A disadvantage of the known construction should be recognized as a weak pollution-retarding ability, as well as the use of filtering elements - grids, which are gradually clogged with dirt.

Also known is the design of a dirt filter (RU, patent 2008604). The specified sump contains a housing with a bottom, and in the housing are located on the same axis of the nozzle of the input and output fluid, a filter element located between these nozzles. At the bottom of the casing, a dirt outlet pipe is made.

A disadvantage of the known device should be recognized the need for periodic cleaning of the filter element, because due to the presence of a significant number of trapped dirt particles, the filter element and, therefore, the entire filter sump gradually loses filtering properties.

The closest analogue of the developed technical solution can be recognized as the well-known design (SU, copyright certificate 1319367) of the filter for pre-treatment of water. The known filter contains a cylindrical vertical housing, drainage and distribution means, the latter of which includes horizontally located in the upper part of the housing, at least partially perforated pipes and a central vertical pipe with holes on the side surface and a plug in the lower end, as well as a granular load, placed between the drainage and distribution means, and the distribution means is additionally equipped with a vertical pipe, muffled from above and installed to Centered within the central vertical pipe, perforated tubes are attached radially to the additional tube, and the end of the latter is spaced from the stub in the central tube.

A disadvantage of the known device should be recognized as its low efficiency, due to the use of granular filter material, prone to adsorption of contaminants, as well as leaching into purified water.

The technical problem solved by the proposed design is to develop an improved inertial-gravity sump for water supply pipelines.

The technical result obtained by the implementation of the proposed design consists in a sharp increase in the duration of the overhaul cycle, while reducing the number of chemical cleanings of boilers that consume filtered water, reducing the energy consumption for pumping coolant through the boilers and increasing the heat transfer coefficient.

To achieve the specified technical result, it is proposed to use the developed inertial slotted filter-sump. The developed inertial slit filter-sump contains a housing in which a pipe for supplying purified water, a pipe for removing purified water and a drainage system are mounted, while a partially perforated pipeline is located inside the housing. The casing is made in the form of a horizontally or inclined cylinder, in one of the sides of which a manhole is mounted for inspection and repair of the sump, a soothing plate is installed in the casing below the manhole, and a pipe of clean water is mounted above the casing axis on the same side below the axis of the casing - the first pipe of the drainage system, on the opposite side of the casing are mounted below the axis of the casing of the pipe for supplying the water to be cleaned for cleaning and above the axis of the casing - the second drainage pipe, designed to I remove floating contaminants from the enclosure. At the specified pipeline in the casing, at least one perforated section is closed, covered by an elliptical visor located in the pipe. An additional drainage is mounted in the lower part of the body in the area of the stilling plate, and at least one elliptical fender is installed against the nozzle for supplying the purified water. In the case of using more than one chipper, they are installed in series. Preferably, the housing is mounted on supports providing a slope of the sump to create the effect of "rolling" mechanical impurities into the stagnant zone under the soothing plate.

An inertial slit filter-designed slot designed to effectively clean various process water flows from mechanical impurities without the use of filter materials, which significantly increases the period of its overhaul life.

The developed design of the mud filter has the following advantages relative to the prior art:

1. The simplicity of the design.

2. Lack of filter materials.

3. High degree of purification from mechanical impurities.

4. Wide scope.

5. No pollution.

6. Low hydraulic resistance.

7. Low cost.

8. Easy to maintain.

9. The design of the sump allows you to solve the global problem of flushing any pipelines from pollution using maximum flushing speeds and minimal discharge of the most contaminated part of the flushing water.

10. Ensuring reliable protection of the pumps when foreign objects get into the water flows.

Below is the design of the developed mud filter in the basic version. The mud filter is a horizontal pressure head cylindrical apparatus containing a cylindrical body. A sunroof is welded into the body for inspection and repair of the sump. Above it is mounted a pipe for the removal of purified water. A pipe for supplying water for cleaning is mounted in the right side of the filter-sump housing. Also, a second drainage pipe is mounted in the upper part of the right side of the casing, which removes floating substances from the dirt filter, such as foliage, wood chips, oil products, etc., and which acts as an air vent when the device is started.

Inside the mud sump casing, a pipeline for the removal of purified water connected to the nozzle is rigidly mounted. Several perforated sections are made on the pipeline, which are covered by elliptical visors. The total area of the slotted slots of each section is calculated in such a way as to obtain the maximum effect of trapping pollution. The gap between the elliptical visors and the mud filter housing is calculated similarly, providing the indicated change in flow direction, leading to effective water purification.

In the left side wall below, the first drainage pipe is mounted, which removes accumulated dirt from the mud filter housing. Also, a soothing plate is installed on the left sidewall to create a stagnant zone in the lower part of the mud box to prevent the sediment from stirring up with a stream of water under variable hydraulic load. An additional drain pipe is also mounted in the lower part of the mud filter housing. An ellipse chipper is installed against the inlet pipe.

The mud filter housing is mounted on supports that provide an inclination of the mud filter housing to create a “rolling” effect of mechanical impurities into the stagnant zone.

The principle of the mud filter is based on a combination of two processes: inertia and gravity. The treated water is supplied through a pipe to the mud filter housing, then the water enters the elliptical chipper and flows smoothly over the elliptical cross section.

By smoothly flowing around the first elliptical visor, the water loses speed and rotates 150 °, and through the first perforated section it enters the pipeline. The rest of the water flow sequentially, sharply changing the direction of movement on the elliptical visors and losing speed, also enters the pipeline through the remaining perforated sections, then the purified water is discharged to the consumer through the pipe. The space between the generators of the elliptical visors and the pipe provides a laminar flow regime of the medium, resulting in a high degree of water purification.

Impurities settled in the lower left part of the sump are periodically removed by opening taps on the drain pipes, and floating contaminants are periodically removed through the pipe.

During the operation of the sump, the separation of pollution occurs as a result of a combination of two gravity processes: natural and due to the forced movement of the water flow from the bottom up from the first to the last perforated sections and two inertia processes:

due to a sharp decrease in the speed of water flow and due to a sharp change in direction of movement. The combination of inertia and gravity allowed to significantly increase the degree of purification of water from mechanical impurities in comparison with the existing standard mesh sumps and to obtain a significant economic effect from the introduction of this unit.

The developed design of the mud filter provides:

Particle size ≥10 microns Performance 0-8000 m ³ / h Pressure loss <0.2 kg s / cm ² Operating pressure 10 kgf / cm ² Medium temperature up to 150 ° C

Installing a mud sump of this design on water supply lines, in particular with respect to heating systems, can dramatically increase the length of the overhaul cycle, reduce the number of chemical cleanings of boilers, reduce the energy consumption for pumping coolant through boilers, and increase the heat transfer coefficient.

Claims (2)

1. Inertial slit filter, comprising a housing in which a purified water supply pipe, a purified water drain pipe and a drainage system are made, while a partially perforated pipe connected to the purified water pipe is located inside the housing, characterized in that the housing is made in the form of a horizontally or obliquely located cylinder, on one of the sides of which a hatchway is welded for inspection and repair of the dirt collector, below which a soothing plate is installed, on the same side above the casing axis, the pipe of clean water discharge and below the casing axis the first pipe of the drainage system, on the opposite side of the casing are mounted below the casing axis of the pipe for supplying the water to be cleaned and above the casing axis of the second drainage pipe, designed to remove floating contaminants from the casing, on the specified at least one perforated section closed by an elliptical visor is made in the pipeline in the housing; an additional component is mounted in the lower part of the housing in the area of the stilling plate itelny drainage and against purified water supply nozzle mounted bump stop elliptical shape. 2. The sump filter according to claim 1, characterized in that the housing is mounted on supports that provide a tilt of the sump to create the effect of "rolling" mechanical impurities into the stagnant zone.