RU192202U1 - Boiler economizer - Google Patents

Abstract

The utility model relates to the field of power engineering, namely, to economizers of low-power hot water boilers (0.1-4 MW). The economizer of the boiler includes a housing divided into an inlet chamber and a heat exchange chamber, inside of which there is a pipe with feed water, a slide gate made of plates, located vertically and separating the inlet chamber from the heat exchange chamber, and a device for turning the slide gate plates. Moreover, the side surface of the heat exchange chamber body is provided with removable plates, in the surface of one of which technological holes for supplying washing fluids are made. The technical result achieved by the implementation of the claimed utility model is to provide maintenance of the economizer of the boiler without stopping it. 1 ill.

Description

The technical field to which the utility model relates.

The utility model relates to the field of power engineering, namely to economizers (devices designed to heat feed water before it enters the evaporative part of the boiler unit by using the heat of the exhaust gases) of low-power hot water boilers (0.1-4 MW).

State of the art

A well-known hot water boiler containing economizers, each of which consists of collectors in the form of half pipes with welded tube sheets and a tube bundle tightly placed in a checkerboard pattern. The direction of movement of water and its speed are regulated using partitioning units installed in the collectors of the furnace screens and economizers [patent RU 2213307 C2, publ. 09/27/2003].

The disadvantage of this device is that the design of the economizer does not provide for repair of pipes located in the center of the beam, therefore, if a leak occurs even in one pipe, it will be necessary to replace the economizer with a new one. In addition, a similar design of an economizer with a horizontal dense arrangement of convective pipes cannot be used for coal combustion, since the annular space will be clogged by soot deposits, and mechanical cleaning of this space is difficult.

The closest analogue of the claimed utility model is an economizer of a multi-way fire tube hot water boiler connected by a bypass duct to the exhaust chamber of the combustion products of the boiler and including a housing in which a heat exchanger is placed with a heat carrier connected to an input collector for entering the heat carrier and an output collector for coolant supply into the boiler water volume, while the heat exchanger is divided by a horizontal partition to provide a two-way the movement of combustion products in the economizer housing, and the economizer housing is equipped with a pipe for removal of combustion products [patent RU 177320 U1, publ. 02/15/2018].

The disadvantage of this device is that the design of the partition wall of the economizer heat exchanger does not take into account the temperature of the medium and does not provide an increase in the operational characteristics of the economizer.

Utility Model Disclosure

The technical problem to which the claimed utility model is aimed is to increase the operational characteristics of the economizer of the boiler due to its uninterrupted operation.

The technical result achieved by the implementation of the claimed utility model is to provide maintenance of the economizer of the boiler without stopping it.

The technical result achieved is achieved due to the fact that the economizer of the boiler includes a housing divided into an inlet chamber and a heat exchange chamber, inside which there is a pipe with feed water, a slide gate consisting of plates located vertically and separating the inlet chamber from the heat exchange chamber, and the device the rotation of the plates of the gate valve, and the side surface of the housing of the heat exchange chamber is equipped with removable plates, in the surface of one of which technological holes are made rstiya for supply of washing liquids.

The presence of a slide gate valve located vertically allows you to control the flue gas flow in the economizer housing of the boiler, cutting off the flue gas flow, thereby allowing cleaning of the heating surfaces in the heat transfer chamber of the economizer of the boiler without stopping it.

Also, the technical result is achieved by the fact that the side surface of the housing from the heat exchange chamber is equipped with removable plates, in the preferred embodiment, two, due to which access is provided inside the economizer of the boiler without stopping it.

The implementation of technological holes designed to supply washing liquids, for example, washing solution or cleaning reagents inside the economizer housing, allows cleaning the internal surfaces of the economizer of the boiler without stopping it.

Brief Description of the Drawings

The implementation of the claimed utility model is illustrated in the drawing, where:

in FIG. 1 shows a General view of the economizer of a boiler,

where in the drawing, the positions have the following notation:

1 - housing

2 - input camera

3 - heat transfer chamber,

4 - pipeline with feed water,

5 - slide gate,

6 - device for turning the plates 7 of the slide gate 5,

7 - plate gate valve 5,

8 - ledge,

9 - removable plate

10 - technological hole,

11 - the direction of the flow of flue gases into the chimney,

12 - the direction of the flow of flue gases from the working boiler.

Information confirming the possibility of implementing a utility model.

The economizer of the boiler, made in figure 1, contains a housing 1, consisting of an inlet chamber 2 for the intake of flue gases and a heat exchange chamber 3, inside which there is a pipeline with feed water; the inlet chamber 2 and the heat exchange chamber 3 are separated by a vertically mounted slide gate valve 5 containing plates 7, and connected to a device 6 for turning the plates 7 of the slide gate. The plates 7 of the slide gate 5 are connected to the slide gate 5 by means of articulated joints and are either simultaneously open or simultaneously closed. In the “open” position, the plates 7 of the slide valve 5 are located horizontally relative to the inner surface of the housing 1, and one of the central plates 7 of the slide valve 5 abuts against the protrusion 8, made in the form, for example, of a corner designed to direct the flow of flue gases in the inlet chamber 2 . In the "closed" position, the plates 7 of the slide valve 5 are located vertically relative to the inner surface of the housing 1, thereby separating the heat exchange chamber 3 from the input chamber 2. The device 6 for turning the plates 7 of the slide valve the wafer is movably connected to the slide gate 5. The lateral surface of the housing 1 of the heat exchange chamber 3 contains removable plates 9, in the preferred embodiment, two, on one of which technological holes 10 are provided for supplying washing liquids, for example, washing solution or cleaning agents. Each of the removable plates 9 is a sheet of metal and is attached to the housing 1 of the economizer using bolted connections. Technological openings 10 for supplying washing liquids are openings of small diameter (up to 30 mm).

The operation of the claimed utility model is as follows.

The overall dimensions of the slide gate 5 are selected so as to coincide with the flow area of the economizer body 1 at the junction of the input chamber 2 and the heat exchange chamber 3. The slide gate 5 has two positions: “open” and “closed”. The position of the plates 7 of the slide gate 5 is changed by exposing the vertical section of the device 6 to the rotation of the plates 7 of the shutter 5: when lowering the vertical section down, the plates 7 of the slide gate 5 occupy a vertical position relative to the surface of the economizer housing 1, thereby switching to the “closed” position; when lifting the vertical section up - the plate 7 of the slide gate valve 5 occupy a horizontal position relative to the surface of the economizer housing 1, thereby moving into the "open" position. In the “open” position, one of the plates 7 (closest to the flue gas) of the gate valve 5 abuts against the protrusion 8, thereby directing the flue gases into the heat exchange chamber 3. The flue gases entering the economizer housing 1 from a working boiler (in the drawings not shown), in the heat exchange chamber 3 heat the pipeline with feed water 3 and go into the chimney (not shown in the drawings). When the position is “closed”, the plates 7 of the slide gate 5 are positioned vertically and block the access of the flue gases to the heat exchange chamber 3. In this case, the flue gases passing the heat exchange zone 2 are sent to the chimney (not shown in the drawings). The device 6 for turning the plates 7 of the slide valve 5 is movably connected to the slide valve 5. The plates 7 of the slide valve 5 are guides for the flow of flue gases and operate synchronously: simultaneously open or simultaneously closed. When the plates 7 of the slide gate 5 are in the “closed” position in the heat exchange chamber 3 while the boiler is running, work can be done to clean the internal surfaces of the economizer body 1 or the heating surfaces of the feed pipe 3 through the process openings 10 for supplying washing fluids. Also, if necessary, to conduct a visual inspection of the pipeline with feed water 3, the plate 7 of the slide gate valve 5 is moved to the closed position and the removable plate 9 located on the side surface of the housing 1 of the economizer of the heat exchange chamber 3 is removed.

Claims (1)

An economizer of a boiler comprising a housing divided into an input chamber and a heat exchange chamber, inside which a feed water pipe is located, characterized in that it comprises a slide gate valve consisting of plates located vertically and separating the input chamber from the heat exchange chamber, and a device for turning the slide gate plates damper, and the side surface of the housing of the heat exchange chamber is equipped with removable plates, in the surface of one of which are made technological holes for supplying washing fluid bones.

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