CN215864700U - Glass kiln exhaust-heat boiler heat exchange tube box equipment capable of adjusting flue gas denitration temperature - Google Patents

Abstract

The utility model discloses glass kiln waste heat boiler heat exchange tube box equipment capable of adjusting flue gas denitration temperature, which comprises a shell, a denitration system flue gas output flue, a denitration system flue gas input flue and a heat exchange tube group, wherein a flue gas inlet is formed in the bottom end of the shell, and a flue gas outlet is formed in the top end of the shell; the flue gas inlet is communicated with high-temperature heat exchange equipment at the front end of the glass kiln waste heat boiler, the heat exchange tube group is horizontally arranged in the shell and is arranged close to the flue gas inlet, and the flue gas outlet is communicated with a flue gas output flue of a denitration system; a smoke and air flow adjusting device is arranged between the smoke input flue of the denitration system and the smoke inlet; the smoke and air flow adjusting device is horizontally arranged in the shell and is arranged in parallel with the heat exchange pipe group. The utility model solves the problems of low flue gas denitration temperature, reduced catalyst activity and over-standard nitric oxide emission concentration in the operation process of the glass kiln waste heat boiler denitration system in the prior art.

Description

Glass kiln exhaust-heat boiler heat exchange tube box equipment capable of adjusting flue gas denitration temperature

Technical Field

The utility model relates to a pipe box device, in particular to a glass kiln waste heat boiler heat exchange pipe box device capable of adjusting flue gas denitration temperature.

Background

With the increasingly strict national requirements on air pollution control, the types of pollutants for limiting emission are gradually increased, and the emission control requirements of nitrogen oxides are clearly and forcibly implemented for many times. According to the production scale and the fuel use condition of the glass industry at present, the temperature in the glass melting furnace is about 1600 ℃, the emission temperature of flue gas of a main flue is distributed between 400 ℃ and 600 ℃, and Nitrogen Oxides (NO) in the flue gas are recovered while the waste heat of the flue gas is recovered in the general technology_x) Environmental protection treatment is carried out, and the industry is called flue gas denitration. A Selective Catalytic Reduction (SCR) method is a commonly used denitration process for glass kiln flue gas, and the suitable operation temperature of the process is 315-400 ℃.

In the prior art, the temperature of flue gas entering a denitration process system from a glass kiln waste heat boiler cannot be adjusted (shown in fig. 3). In the actual operation process, the temperature of flue gas entering a denitration process system is low, so that the activity of a catalyst of the denitration process system is reduced, the denitration catalyst is blocked, and the normal operation of the denitration process system is influenced. Therefore, the glass kiln waste heat boiler heat exchange tube box device capable of adjusting the flue gas denitration temperature is developed through modern industrial equipment, and is imperative to the glass kiln flue gas waste heat recovery and environmental protection treatment industries.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide glass kiln waste heat boiler heat exchange tube box equipment capable of adjusting flue gas denitration temperature, and solves the problems that in the prior art, the flue gas denitration temperature is low in the operation process of a glass kiln waste heat boiler denitration system, so that the activity of a catalyst is reduced, and the emission concentration of nitrogen oxides exceeds the standard.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a glass kiln waste heat boiler heat exchange tube box device capable of adjusting flue gas denitration temperature comprises a shell, a denitration system flue gas output flue, a denitration system flue gas input flue and a heat exchange tube group, wherein a flue gas inlet is formed in the bottom end of the shell, and a flue gas outlet is formed in the top end of the shell; the flue gas inlet is communicated with high-temperature heat exchange equipment at the front end of the glass kiln waste heat boiler, the heat exchange tube group is horizontally arranged in the shell and is arranged close to the flue gas inlet, and the flue gas outlet is communicated with a flue gas output flue of a denitration system; a smoke and air flow adjusting device is arranged between the smoke input flue of the denitration system and the smoke inlet; the smoke and air flow adjusting device is horizontally arranged in the shell and is arranged in parallel with the heat exchange pipe group.

Preferably, the heat exchange tube group is composed of a horizontally reciprocating serpentine tube bundle equipped with an inlet collecting header and an outlet collecting header.

Preferably, the serpentine tube bundle is arranged in double turns, in-line.

Preferably, the smoke and wind flow adjusting device comprises a rectangular flue and an electric louver valve;

one end of the rectangular flue is communicated with the flue gas inlet, and the other end of the rectangular flue is communicated with the flue gas input flue of the denitration system;

the electric louver valve is horizontally arranged in the rectangular flue and is arranged close to the flue gas inlet.

Preferably, the electric louver valve is a variable-frequency electric driving device.

The utility model has the beneficial effects that:

by adopting the glass kiln waste heat boiler heat exchange tube box equipment capable of adjusting the flue gas denitration temperature, the technical guarantee of the lower limit value of the flue gas temperature entering the denitration process system is realized by arranging the flue gas flow adjusting device, and the problems that the activity of a catalyst of the denitration process system is reduced, the denitration catalyst is blocked and the emission concentration of nitrogen oxides exceeds the standard due to the low flue gas temperature entering the denitration process system are effectively avoided. The technical scheme of the utility model realizes the adjustment of the temperature of the flue gas entering the denitration process system, provides powerful technical guarantee for the stable and efficient operation of the waste heat boiler and the denitration system of the glass kiln, and has better economic benefit and environmental protection benefit.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of node I of FIG. 1;

FIG. 3 is a prior art glass kiln waste heat boiler heat exchange tube box arrangement;

in the figure: 1. the heat exchange tube set comprises a heat exchange tube set, 2, a smoke and air flow adjusting device, 3, a shell, 4, a smoke inlet, 5, a smoke outlet, 6, a snake-shaped tube bundle, 7, an inlet collecting header, 8, an outlet collecting header, 9, a rectangular flue and 10, an electric louver valve; 11. flue gas of a denitration system is input into a flue; 12. and a flue gas output flue of the denitration system.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The relative arrangement of the components and steps, expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways (rotated 90 degrees or at other orientations).

As shown in fig. 1, the glass kiln waste heat boiler heat exchange tube box equipment capable of adjusting flue gas denitration temperature of the utility model comprises a heat exchange tube group 1, a denitration system flue gas input flue 11, a denitration system flue gas output flue 12, a flue gas and air flow adjusting device 2 and a shell 3; the heat exchange tube group 1 and the smoke and air flow adjusting device 2 are horizontally arranged in parallel in the shell 3; a smoke inlet 4 is formed in the bottom end of the shell 3, and a smoke outlet 5 is formed in the top end of the shell 3; the flue gas inlet 4 is communicated with a high-temperature heat exchange device at the front end of the glass kiln waste heat boiler, and the flue gas outlet 5 is communicated with a flue gas output flue 12 of the denitration system. One end of the smoke and air flow adjusting device 2 can be communicated with the smoke inlet 4, and the other end of the smoke and air flow adjusting device can be communicated with the denitration system smoke input flue 11, so that high-temperature smoke output by high-temperature heat exchange equipment at the front end of the glass kiln can be directly input into the denitration system smoke input flue 11 when necessary, and the smoke temperature in the denitration system smoke input flue 11 can be adjusted.

The heat exchange tube group 1 is composed of a horizontally reciprocating serpentine tube bundle 6 which is provided with an inlet collecting header 7 and an outlet collecting header 8.

The glass kiln waste heat boiler heat exchange tube box equipment capable of adjusting the flue gas denitration temperature is characterized in that the snake-shaped tube bundle 6 is arranged in a double-winding and in-line mode.

The smoke and wind flow adjusting device 2 consists of a rectangular flue 9 and an electric louver valve 10; the electric louver valve 10 is horizontally arranged in the rectangular flue 9. The rectangular flue 9 is arranged in parallel with the heat exchange tube group 1.

The electric louver valve 10 is a variable frequency electric driving device.

When the glass kiln waste heat boiler and the denitration system are in operation, smoke from a main flue of a glass melting kiln (under normal working conditions) is firstly reduced to a set temperature through high-temperature heat exchange equipment and then enters a glass kiln waste heat boiler heat exchange tube box capable of adjusting smoke denitration temperature from a smoke inlet 4, and the smoke is sent to the denitration system equipment through a smoke outlet 5 after heat exchange of the smoke is completed in the heat exchange tube box to complete a subsequent environment-friendly process flow. When the temperature of flue gas from a main flue of a glass melting furnace fluctuates downwards (deviates from a working condition), the temperature of the flue gas entering denitration system equipment is too low, so that the activity of a catalyst of a denitration process system is reduced and blocked, and an expected denitration effect cannot be realized, at the moment, an electric louver valve 10 of a flue gas and air flow regulating device 2 is opened, the temperature of the flue gas and air entering the denitration system equipment is regulated to the proper operating temperature of a denitration process, and the stable and efficient operation of the denitration system equipment is ensured; when the temperature of the flue gas from the main flue of the glass melting furnace returns to the normal working condition, the flue gas and air flow regulating device 2 is out of operation.

Claims (5)

1. A glass kiln waste heat boiler heat exchange tube box device capable of adjusting flue gas denitration temperature comprises a shell, a denitration system flue gas output flue, a denitration system flue gas input flue and a heat exchange tube group, wherein a flue gas inlet is formed in the bottom end of the shell, and a flue gas outlet is formed in the top end of the shell; the flue gas inlet is communicated with high-temperature heat exchange equipment at the front end of the glass kiln waste heat boiler, the heat exchange tube group is horizontally arranged in the shell and is arranged close to the flue gas inlet, and the flue gas outlet is communicated with a flue gas output flue of a denitration system; the denitration system is characterized in that a smoke and air flow adjusting device is arranged between the smoke input flue and the smoke inlet of the denitration system; the smoke and air flow adjusting device is horizontally arranged in the shell and is arranged in parallel with the heat exchange pipe group.

2. The glass kiln waste heat boiler heat exchange tube box equipment capable of adjusting the flue gas denitration temperature as claimed in claim 1, wherein the heat exchange tube group is composed of a horizontally reciprocating serpentine tube bundle equipped with an inlet collecting header and an outlet collecting header.

3. The glass kiln waste heat boiler heat exchange tube box equipment capable of adjusting the flue gas denitration temperature as claimed in claim 2, wherein the serpentine tube bundle is arranged in a double-winding and in-line manner.

4. The glass kiln waste heat boiler heat exchange tube box equipment capable of adjusting the flue gas denitration temperature as claimed in claim 1, wherein the flue gas flow adjusting device comprises a rectangular flue and an electric louver valve;

one end of the rectangular flue is communicated with the flue gas inlet, and the other end of the rectangular flue is communicated with the flue gas input flue of the denitration system;

the electric louver valve is horizontally arranged in the rectangular flue and is arranged close to the flue gas inlet.

5. The glass kiln waste heat boiler heat exchange tube box equipment capable of adjusting the flue gas denitration temperature as claimed in claim 4, wherein the electric louver valve is a variable frequency electric driving device.

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