RU202092U1 - Water heating boiler - Google Patents

Abstract

The utility model relates to heat power engineering and can be used to heat the coolant in heating and hot water supply systems for housing and communal services, in particular to hot water boilers using latent heat in flue gases. The objective of the claimed utility model is to create a small-sized, powerful, economical and safe The problem is solved as follows: In a device for wet cleaning and utilization of heat of air and flue gases, consisting of a tubular hollow body made of alloy steel, partially filled with water, an inlet for supplying contaminated gas, an outlet for exhaust clean gas, pipes for sludge removal, a pump for supplying water from the lower part of the body to the upper part, a perforated plate horizontally installed on a grate made of corrosion-resistant metal, a heat exchanger is placed in its lower part of the body filled with water t in the form of a tubular coil and a second pump is installed. The device uses a pressurized or cyclonic burner. The advantages of the inventive water heating boiler compared to existing ones are low weight, high power, safety. 3 ill.

Description

The utility model relates to heat power engineering and can be used to heat the coolant in heating and hot water supply systems for housing and communal services, household and industrial needs, namely, to the field of production of outdoor and indoor hot water boilers, in particular to hot water boilers using hidden heat in flue gases.

The definition of a boiler and a boiler plant is given in GOST 23172-78 “Stationary boilers. Terms and definitions ", hot water boiler - in GOST 25720-83" Hot water boilers. Terms and Definitions"

A device for utilizing heat from flue gases is known, (RU, No. 2436011, F22B1 / 18, 10.12.2011)., Containing a gas-gas heat exchanger, a condenser, an inertial droplet separator, gas ducts, air ducts, fans and a pipeline, while the gas-gas surface plate heat exchanger It is made according to the counterflow scheme, a surface gas-air plate heat exchanger is installed as a condenser. Cooled wet flue gases enter the gas-air surface plate heat exchanger-condenser, where the water vapor contained in the flue gases condenses, heating the air. The heated air is used to heat the premises and cover the needs of the gas combustion process.

The disadvantages of the device include a rather complicated technology of heat recovery and the use of a conditioned surface plate heat exchanger, which has a significantly developed surface, amounting to hundreds of square meters per 1 m ^{3 of the} volume of the apparatus.

An analysis of the state of the art has shown that existing water heating boilers have a high metal content; if the safety valves used in the construction of boilers fail, there is a risk of explosion; during operation, the heat-resistant pipes are clogged with soot and their inner surfaces are calcined; the exhaust gases are hot.

Also known is a heat exchanger for deep utilization of flue gas heat (RU, 2555919, F22B1 / 18, publ. 10.07.2015). According to the invention, an insulated tank with running water is placed in front of the chimney, which has jackets on the end sides, divided by horizontal shelves into sections. Inside the tank there are horizontal parallel rows of pipes and uniting the volumes of jackets, consisting of separate bundles in which the flue gases move in one direction. The bundles of pipes alternate with each other with large volumes of jacket sections, which change the direction of movement of flue gases in adjacent bundles, thus forming a coil of variable cross-section for moving flue gases towards the flowing water. Hot flue gases move along a coil, the pipes of which are immersed in a tank with running cooling water.

The disadvantages also include complex heat recovery technology and sophisticated equipment.

A device for wet cleaning and utilization of heat of air and flue gases (RU, z.№2020124568 from 23.07.2020) was adopted as a prototype, consisting of a tubular hollow body made of alloy steel, partially filled with water, an inlet pipe for supplying contaminated gas, an outlet pipe for clean gas outlet, pipes for sludge removal, a pump for supplying water from the lower part of the housing to the upper part. In the upper part of the body, a perforated plate is horizontally installed on a grid made of non-oxidizing material.

The objective of the claimed utility model is to create a small-sized, powerful, economical and safe water-heating device for the needs of the national economy.

The task is solved as follows. In a water heating boiler, consisting of a tubular hollow body made of alloy steel, partially filled with water, an inlet for supplying contaminated gas, an outlet for discharging clean gas, a pipe for removing sludge, a pump for supplying water from the lower part of the body to the upper part, where A perforated plate is installed on a grid made of corrosion-resistant metal, a heat exchanger in the form of a tubular coil is located in the lower part of the body filled with water, and a second pump is additionally turned on.

Thus, the device described as a prototype, with a certain refinement, can be converted into a water heating boiler. For this, a heat exchanger in the form of a tubular coil is placed in the lower part of the housing filled with water, and a second pump is installed. The device uses a forced draft or cyclonic burner.

The following fuels are used: gas, diesel, coal, wood chips.

The advantages of the proposed water heating boiler in comparison with the existing ones are:

- light weight - 200-400 kg; high power - 200-1500 kW;

- security. When the pressure rises, the boiler cannot explode, because water does not heat up above 100 degrees, there are no safety valves;

- no heat-resistant pipes are required, on a national scale this is a big economy;

- due to the fact that soot does not form during operation, there is no cleaning system;

- there is no calcium deposition on the pipe walls.

The utility model is illustrated by drawings:

Figure 1 is a general view of a water heating boiler (side view);

Figure 2 is a general view of a water heating boiler (front view);

Figure 3 is an isometric view of a water heating boiler;

The water heating boiler contains a pipe-shaped body 1, partially filled in the lower part with water 2, a nozzle 3 for introducing dusty gas and a nozzle 4 for an outlet of purified gas, a pipe for removing sludge (not indicated in the drawing), a pipeline for water supply 5, a pump 6 for water supply from the lower part of the housing 1 to its upper part, where a perforated plate 8 is installed on the grid 7 made of corrosion-resistant metal in a strictly horizontal position. In the lower part of the housing 1 filled with water, there is a heat exchanger 9 in the form of a tubular coil. In addition, the design additionally includes a second pump 10 for cooling the flue gases at the outlet of the boiler. In Fig. 3, for a better presentation, the inlet to the coolant 11 and the outlet from the coolant 12 are indicated.

The device works as follows.

The water supply from the lower part of the housing to the upper part is provided by a pump. After passing through a perforated sheet with holes, water in free fall pours out to the bottom of the case. When hot air passes through jets of water, heat is transferred and the air is partially cleaned. For higher cleaning, the area of the holes is changed. The perforated sheet must be installed strictly horizontally, and always on the grid, to avoid sagging, otherwise the cleaning effect is reduced.

The flame from the burner enters through the branch pipe 3. It passes through the water jets and exits through the branch pipe 4 into the atmosphere. The heat from the flame is transferred through the water to the heat exchanger 9 for further transportation. To reduce the temperature of the exhaust gases, an additional pump 10 is installed.

Thus, the implementation of the utility model solves the tasks set by the authors. The boiler is lightweight, powerful, does not clog up with soot, scale. The pressure does not rise.

Claims (1)

A water heating boiler, consisting of a tubular hollow body made of alloy steel, partially filled with water, an inlet for supplying contaminated gas, an outlet for discharging clean gas, a pipe for removing sludge, a pump for supplying water from the lower part of the body to the upper part, where on the grate a perforated plate is installed made of corrosion-resistant metal, characterized in that a heat exchanger in the form of a tubular coil is located in the lower part of the body filled with water, and a second pump is additionally switched on.

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