RU220953U1 - Device for cleaning tubular elements of the recuperator - Google Patents

Abstract

The utility model relates to power engineering, namely to a device for cleaning the tubular elements of the recuperator of a ventilation unit, intended primarily for servicing buildings in the agro-industrial and/or livestock sectors. In the housing 1 of the installation there is a recuperator, an exhaust 4 and a supply 3 fans, a means for heating the supply air 5 and a recirculation valve 6. The recuperator includes tubular elements in the form of polymer thin-walled lamellas 2. The device for cleaning the tubular elements of the recuperator contains a riser 11, one end connected to a pump 10 for supplying water, and the other to a pipeline 12, from which side branches extend with sprinklers 14 formed in them, located above the tubular elements of the recuperator. An inclined tray 15 is installed under the tubular elements, connected to the bath 16 for collecting and draining waste water. The invention makes it possible to increase efficiency and reduce energy consumption when operating an installation with lamellas resistant to aggressive environments in both winter and summer, and a device for cleaning the lamellas will, in addition, extend the service life of the installation. 1 salary f-ly, 2 ill.

Description

The utility model relates to the field of power engineering and can be used in the design of ventilation units equipped with a device for cleaning the tubular elements of the recuperator. Such installations are intended primarily for servicing buildings in the agro-industrial and/or livestock sectors.

An air conditioner is known that supplies humidified air into a room and is designed to remove dust. Said air conditioner is equipped, in particular, with a recirculating water atomizing device, including a pump connected to a piping system designed to move water from the pump to the atomizing means, draining waste water into a receiving tank equipped with a filtration unit and supplying filtered water to the pump (KR 101597324 B1 , class F24F 7/08, published 02/18/2016).

The known air conditioner is intended for humidification of air in residential or public premises, but is not suitable for use in premises of the agro-industrial complex, the exhaust air of which may contain large suspended particles, such as, for example, balls of wool, bird feathers, etc., settling on the tubular elements of the recuperator, since waste water in the known device is discharged through pipes, and not through a pan, which, as a result of the above, will quickly become clogged.

A device for cleaning a tubular heat exchanger is also known, which contains a pipeline system with control valves for supplying flushing water to the heat exchanger and discharging waste water. In addition, the known device is equipped with a heat exchanger backwash pipeline, additionally connected to a cleaning agent storage tank (CN 215598206 U, class F28G 9/00, published 01/21/2022).

The disadvantage of this device is the same as that of the above air conditioner.

In addition, increasing the cleaning efficiency of the known device is associated with the presence in it of a backwash system and a reservoir with a cleaning agent intended for this purpose, which complicates and increases the cost of the design.

A known system of supply and exhaust ventilation of premises for keeping animals or birds, equipped with a tubular heat exchanger. According to this system, in a room with the height of the living area of domestic animals, supply-laminar ejection air distributors are installed - humidifiers, along the entire height of which cassettes filled with hygroscopic material are installed. Above the upper cassette there is an irrigation device connected to a water supply system, on which an automatic valve is mounted, which has an electrical connection with a sensor for controlling the relative air humidity in the living area of the animals. At the bottom of the heat exchanger there is a tray filled with water, with a submersible pump located in it, the magnetic starter of which has an electrical connection with the air temperature control sensor. In the upper part of the pan there is a pipe, which is connected through a connecting air duct to conical air outlets located on the sides of the entrance door of the room (RU 2076282, class F24F 7/00, published 03/27/1997).

In the known system, the irrigation device is intended mainly to control the relative humidity of the air in the area where animals live.

The design closest to the proposed solution is a flushing system for a waste heat steam generator made of pipes, containing a riser, one end connected to a water supply pump, and the other to a pipeline, from which side branches extend in the form of pipes with nozzles formed in them, located above the pipes of the recovery steam generator, while under these pipes an inclined plate is installed, connected to a tank for collecting and discharging waste water (CN 113008069, class F22B 37/52, published 06/22/2021).

The disadvantage of the known system is the absence of a device for purification and recycling of waste water.

Due to the peculiarities of the technological process taking place in the serviced premises for agro-industrial purposes, the exhaust air contains large suspended particles, for example, balls of wool, bird feathers, as well as a variety of dust and aggressive substances, such as ammonia, alkaline compounds , which can cause corrosion of tubular or classic aluminum cross-flow heat exchangers, as well as contaminate their heat exchange surfaces, which can lead to their complete inoperability.

The technical problem solved by the utility model is to improve the operational properties of the device for cleaning the tubular heat exchanger of a ventilation unit with a recuperator in both cold and warm (hot) seasons by cooling the tubular elements of the recuperator, which makes it possible to create a temperature inside the room that is comfortable for animals and poultry mode.

The technical result aimed at solving this problem is to increase the efficiency of the device for cleaning the tubular recuperator of the ventilation unit by equipping it with a means of purifying waste water and its further use thanks to a means of recirculation, which will extend the service life of the said unit without the need to stop it for mechanical cleaning or replacement clogged tubular elements of the recuperator.

The named technical result was achieved in the utility model using the following set of features.

The device for cleaning the tubular elements of the recuperator contains a riser, one end connected to a pump for supplying water, and the other to a pipeline, from which side branches extend with sprinklers formed in them, located above the tubular elements of the recuperator. A tray is installed under the tubular elements, connected to the bathtub for collecting and discharging waste water.

The tray is inclined towards the bathtub, and under the bottom of the tray and the bathtub there is a means for heating them.

The said device is equipped with means for cleaning and recycling waste water.

The utility model is illustrated by drawings.

In fig. Figure 1 schematically shows the ventilation unit (side sectional view).

Figure 2 shows a diagram of a device for cleaning the tubular elements of the recuperator.

Shown in FIG. 1 supply and exhaust ventilation unit is mounted in housing 1. The ventilation unit includes a counterflow recuperator (heat exchanger) block made of tubular elements in the form of lamellas 2, axial fans 3 and 4, respectively, for supplying and removing exhaust air, and a water heater 5 for additional heating air leaving the recuperator, configured to regulate the temperature of the air leaving the recuperator, as well as a recirculation check valve 6 communicating with the room.

The recuperator is used to preheat cold outdoor supply air by removing warm exhaust air.

Each lamella 2 is made of an oblong length (for example, 6-8 m) from a polymer material, for example, such as polyvinyl chloride.

During operation of the ventilation unit, dust and large contaminants settle on the surface of the lamellas 2 of the recuperator, which significantly reduces the efficiency of heat transfer and increases the cost of heating the air. To clean the lamellas 2 of the recuperator, a device is provided, which is a system of hermetically connected polypropylene pipes. A diagram of this cleaning device is shown in Fig. 2. Water is supplied to the said device under pressure from a high-pressure water pump 7. From pump 7, water enters the main riser 8 (Fig. 1) and rises along it to the upper part of the installation, where, using an outlet, it enters the high-pressure central pipeline 9, the length of which is about 6 meters. From the central pipeline 9, with a certain pitch at an angle of 90°, side branches of water distribution pipes 10 (Fig. 2) extend, in which holes 11 (Fig. 1) with a diameter of 1.5 mm are formed according to the number of lamellas 2 in the top row of the recuperator. The holes 11 are made in such a way that the water from them is sprayed to the sides towards the jets flowing from the holes of adjacent pipes 10, as shown in Fig. 1 using dotted lines. Water under pressure hits the outer surfaces of the lamellas 2 that require cleaning, removing dirt and cooling them. Water, washing these surfaces, flows into the lower part of the installation, where it enters the pan 12, which has a slope towards the water receiving bath 13. Thanks to the slope, the water rushes into the first cavity 14 of the bath (Fig. 2), where it is cleaned from suspended particles and large contaminants through a dirt trap 15. Part of the purified water flows to the water pump 7 and is supplied to the riser 8 again, and the other part is discharged through pipeline 16 into the sewer system 17, but at the same time is compensated by clean water from the central water supply network 18. When completely turned off The ventilation unit completely discharges water from the water receiving bath 19 into the central sewer network.

A self-regulating heating cable (not shown) is installed across the entire area at the bottom of the drain pan 12 and the water receiving bath 19, which makes it possible to prevent freezing of the water in the bath 19 during operation or a complete stop of the cleaning device in winter.

In the summer, the cleaning device allows you to create a temperature regime inside the room that is comfortable for animals and poultry due to water cooling the outer surface of the lamellas, through which hot atmospheric air enters the installation.

Claims (2)

1. A device for cleaning the tubular elements of the recuperator, containing a riser, one end connected to a pump for supplying water, and the other to a pipeline, from which side branches extend with sprinklers formed in them, located above the tubular elements of the recuperator, while an inclined one is installed under the tubular elements a tray connected to the bathtub for collecting and discharging waste water, the device being equipped with means for cleaning and recycling waste water. 2. The device according to claim 1, in which a means for heating them is located under the bottom of the tray and bathtub.