CN210089427U - Rock wool production quenching and tempering stove low temperature flue gas waste heat recovery device - Google Patents

Abstract

The utility model discloses a rock wool production quenching and tempering stove low temperature flue gas waste heat recovery device, include: the utility model relates to a flue gas treatment technical field, the device reasonable in design, novel structure, the feature is good, can retrieve low temperature flue gas waste heat effectively, reaches environmental protection emission standard, and the exhaust gas after-combustion stove is installed to sack dust catcher, entry flue, expansion joint, waste heat recovery device, export flue, desulfurizing tower and flue gas, entry flue one end is installed on the sack dust catcher to install in sack dust catcher right-hand member, the flue gas after-combustion stove is installed on sack dust catcher right side, and connect through the entry flue, the expansion joint is installed on the flue gas after-combustion stove to be located flue gas after-combustion stove right-hand member, waste heat recovery device one end is installed on the expansion joint, export flue one end is installed on the waste heat recovery device other end, the desulfurizing tower is connected with the export flue other end, the utility model.

Description

A low-temperature flue gas waste heat recovery device for rock wool production quenching and tempering furnace

technical field

The utility model relates to the technical field of flue gas treatment, in particular to a low-temperature flue gas waste heat recovery device of a quenching and tempering furnace for rock wool production.

Background technique

In the industrial production process, a large amount of flue gas with a certain temperature will be generated. According to the temperature, the flue gas is divided into high temperature flue gas (>600 ℃), medium temperature flue gas (230 ~ 600 ℃), low temperature flue gas (<230 ℃) ℃), in the recovery and utilization of waste heat resources, the waste heat utilization of high temperature flue gas is relatively good, while the waste heat recovery rate of medium and low temperature flue gas (especially low temperature flue gas) is relatively low, mainly due to the high temperature flue gas. The calorific value of the gas is relatively high and the utilization difficulty is small, so the utilization rate of this part of the waste heat is relatively high, while the medium and low temperature flue gas, especially the low temperature flue gas, has a low calorific value and a small functional capacity due to its low temperature. And the principle of capacity cascade application, it is difficult to find suitable heat users, so the low-temperature flue gas is directly discharged into the atmosphere, causing environmental pollution and waste of energy. In view of this, in-depth research on the above problems, Hence this case.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides a low-temperature flue gas waste heat recovery device for a quenching and tempering furnace for rock wool production, which solves the problem that the low-temperature flue gas has a low temperature, a small calorific value, and a small working capacity. It is difficult to find a suitable heat user, so the low-temperature flue gas is directly discharged into the atmosphere, causing environmental pollution and waste of energy.

In order to achieve the above purpose, the utility model is realized through the following technical solutions: a low-temperature flue gas waste heat recovery device of a quenching and tempering furnace for rock wool production, mainly comprising: a bag filter, an inlet flue, an expansion joint, a waste heat recovery device, and an outlet smoke One end of the inlet flue is installed on the bag cleaner and is installed on the right end of the bag cleaner. The expansion joint is installed on the flue gas reburning furnace and is located at the right end of the flue gas reburning furnace, one end of the waste heat recovery device is installed on the expansion joint, and one end of the outlet flue is installed on the other end of the waste heat recovery device. , the desulfurization tower is connected with the other end of the outlet flue.

Preferably, the flue gas reburning furnace includes: a reburning burner, a flue gas premixer, an adiabatic combustion chamber and a supplementary combustion burner;

The flue gas premixer is connected to the other end of the inlet flue, the re-combustion burner is installed on the flue gas premixer and is located at the top of the flue gas premixer, and the adiabatic combustion chamber is premixed with the flue gas The bottom end of the burner is connected, and the supplementary combustion burner is installed at the bottom end of the adiabatic combustion chamber.

Preferably, the flue gas dedusted by the bag filter is re-combusted to generate high-temperature flue gas of 800-900°C, and the re-combustion fuel is natural gas.

Preferably, the waste heat recovery device is a natural circulation water tube waste heat boiler, and the heating surface is provided with a membrane type water wall, a superheater, an evaporator and an economizer.

Preferably, the expansion joint has an annular structure.

Preferably, the flue gas premixer has a cylindrical structure, and the front section is made of several small tube circles as three-layer rings, the flue gas flows in the tubes, and the air flows between the tubes, so that the reburned flue gas and air are evenly dispersed and sent into the furnace, The rear section is a steel plate rolled cylinder.

beneficial effect

The utility model provides a low-temperature flue gas waste heat recovery device for a quenching and tempering furnace for rock wool production, which has the following beneficial effects: the low-temperature flue gas waste heat recovery device for a quenching and tempering furnace for rock wool production has a reasonable design, a novel structure, good environmental protection performance, and can effectively The waste heat of the low-temperature flue gas is recovered to meet the environmental protection emission standards. The CO gas generated in the process of rock wool production is collected by the bag filter. CO is a combustible gas. After the heat is absorbed by the waste heat boiler, the exhaust gas temperature is 150 °C, and then it is discharged into the atmosphere after desulfurization by the desulfurization tower, which solves the problem that the low temperature flue gas has a low temperature, a small calorific value, and a small working capacity, so it is difficult to find a suitable Therefore, the low-temperature flue gas is directly discharged into the atmosphere, causing environmental pollution and waste of energy.

Description of drawings

Figure 1 is a schematic front view of the structure of a low-temperature flue gas waste heat recovery device for a quenching and tempering furnace for rock wool production according to the present invention.

Fig. 2 is a partial enlarged structural schematic diagram of a low-temperature flue gas waste heat recovery device of a quenching and tempering furnace for rock wool production according to the utility model.

3 is a schematic side view of the structure of the expansion joint part of the low-temperature flue gas waste heat recovery device of a quenching and tempering furnace for rock wool production according to the utility model.

In the figure: 1. Bag filter; 2. Inlet flue; 3. Re-combustion burner; 4. Flue gas premixer; 5. Adiabatic combustion chamber; 6. Supplementary combustion burner; 7. Expansion joint; 8. Waste heat recovery device; 9. Outlet flue; 10. Desulfurization tower.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

All the electrical components in this case are connected with the power supply to which they are adapted through wires by those skilled in the art, and appropriate controllers and encoders should be selected according to the actual situation to meet the control requirements. For specific connections and control sequences, please refer to the following In the working principle described above, the electrical connection between the electrical components is completed in sequence, and the detailed connection method is known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

Embodiment: The utility model provides a technical solution: according to the accompanying drawings 1-3 of the description, this case is a low-temperature flue gas waste heat recovery device of a quenching and tempering furnace for rock wool production, which mainly includes: a bag filter 1, an inlet flue 2 , expansion joint 7, waste heat recovery device 8, outlet flue 9, desulfurization tower 10 and flue gas reburning furnace, the connection relationship is as follows:

One end of the inlet flue 2 is installed on the bag cleaner and is installed on the right end of the bag cleaner. The flue gas reburning furnace is installed on the right side of the bag cleaner and is connected through the inlet flue 2. The expansion joint 7 is installed on the flue gas reburning furnace. , and is located at the right end of the flue gas reburning furnace, one end of the waste heat recovery device 8 is installed on the expansion joint 7, one end of the outlet flue 9 is installed on the other end of the waste heat recovery device 8, and the desulfurization tower 10 is connected with the other end of the outlet flue 9.

It can be seen from the above general situation that when in use, the low-temperature flue gas from the quenching and tempering furnace for rock wool production is sucked into the bag filter 1 through the connection flue for dust removal, and the dust-removed low-temperature flue gas is introduced into the flue gas re-combustion chamber. After mixing with combustion-supporting air, it is mixed and burned around the long-open flame of the re-ignition burner 3. The temperature after combustion is 800-900 ° C. The high-temperature flue gas is introduced into the waste heat boiler. After heat exchange, the temperature of the flue gas is cooled to 150 ° C, and the heat exchange The last flue gas is introduced into the desulfurization tower 10 for desulfurization treatment. After desulfurization, the flue gas is discharged through the chimney. When the heat of the flue gas at the tail of the quenching and tempering furnace for rock wool production is insufficient, supplementary combustion of natural gas is used to stabilize the furnace temperature of the combustion chamber to ensure the complete stability of CO gas. Combustion solves the problem that low-temperature flue gas is difficult to find suitable heat users due to its low temperature, small calorific value, and small functional capacity. Therefore, low-temperature flue gas is directly discharged into the atmosphere, causing environmental pollution. At the same time, it also causes the problem of wasting energy.

As a preferred solution, further, the flue gas reburning furnace includes: a reburning burner 3, a flue gas premixer 4, an adiabatic combustion chamber 5 and a supplementary combustion burner 6;

The flue gas premixer 4 is connected to the other end of the inlet flue 2, the re-combustion burner 3 is installed on the flue gas premixer 4, and is located at the top of the flue gas premixer 4, and the adiabatic combustion chamber 5 is premixed with the flue gas The bottom end of the burner 4 is connected, and the supplementary combustion burner is installed at the bottom end of the adiabatic combustion chamber 5 .

As a preferred solution, further, the flue gas dedusted by the bag filter 1 is re-combusted to generate high-temperature flue gas of 800-900°C, and the re-combustion fuel is natural gas.

As a preferred solution, further, the waste heat recovery device 8 is a natural circulation water tube waste heat boiler, and the heating surface has a membrane type water cooling wall, a superheater, an evaporator and an economizer.

As a preferred solution, further, the expansion joint 7 has a ring-shaped structure.

As a preferred solution, further, the flue gas premixer 4 has a cylindrical structure, and the front section is made of several small tube rings to make three-layer rings. It is sent into the furnace, and the latter part is the steel plate rolled cylinder.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. without more restrictions. An element defined by the phrase "comprising an... does not preclude the presence of additional identical elements in a process, method, article or apparatus comprising said element".

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides a rock wool production quenching and tempering stove low temperature flue gas waste heat recovery device mainly includes: sack cleaner (1), entry flue (2), expansion joint (7), waste heat recovery device (8), export flue (9), desulfurizing tower (10) and flue gas after-combustion stove, its characterized in that, entry flue (2) one end is installed on the sack cleaner to install in sack cleaner right-hand member, the flue gas after-combustion stove is installed in sack cleaner right side, and connect through entry flue (2), expansion joint (7) are installed on the flue gas after-combustion stove to be located the flue gas after-combustion stove right-hand member, waste heat recovery device (8) one end is installed on expansion joint (7), export flue (9) one end is installed on waste heat recovery device (8) other end, desulfurizing tower (10) are connected with export flue (9) other end.

2. The rock wool production tempering furnace low-temperature flue gas waste heat recovery device of claim 1, wherein the flue gas after-combustion furnace comprises: the device comprises a reburning combustor (3), a smoke-air premixer (4), a heat insulation combustor (5) and a afterburning combustor (6);

the gas-air pre-mixer (4) is connected with the other end of the inlet flue (2), the re-combustion burner (3) is installed on the gas-air pre-mixer (4) and is located at the top end of the gas-air pre-mixer (4), the heat insulation combustion chamber (5) is connected with the bottom end of the gas-air pre-mixer (4), and the afterburning burner is installed at the bottom end of the heat insulation combustion chamber (5).

3. The rock wool production conditioning furnace low-temperature flue gas waste heat recovery device as claimed in claim 1, wherein the flue gas dedusted by the bag-type dust remover (1) is subjected to re-combustion to generate 800-900 ℃ high-temperature flue gas, and the re-combustion fuel is natural gas.

4. The rock wool production conditioning furnace low-temperature flue gas waste heat recovery device as claimed in claim 1, wherein the waste heat recovery device (8) is a natural circulation water pipe waste heat boiler, and the heating surface comprises a membrane water wall, a superheater, an evaporator and an economizer.

5. The rock wool production tempering furnace low-temperature flue gas waste heat recovery device according to claim 1, wherein the expansion joint (7) is of a circular ring structure.

6. The rock wool production tempering furnace low-temperature flue gas waste heat recovery device according to claim 2, wherein the flue gas and air premixer (4) is of a cylindrical structure, the front section is made into a three-layer ring by a plurality of small pipe rings, flue gas flows in the pipes, air flows between the pipes, reburning flue gas and air are uniformly dispersed and sent into a hearth, and the rear section is a steel plate rolling cylinder.

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