CN213447200U - Waste heat utilization system of continuous annealing furnace - Google Patents
Waste heat utilization system of continuous annealing furnace Download PDFInfo
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- CN213447200U CN213447200U CN202021402521.7U CN202021402521U CN213447200U CN 213447200 U CN213447200 U CN 213447200U CN 202021402521 U CN202021402521 U CN 202021402521U CN 213447200 U CN213447200 U CN 213447200U
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Abstract
The utility model discloses a continuous annealing furnace waste heat utilization system. Including continuous annealing stove slow cooling section, continuous annealing stove slow cooling section passes through the rectangle tobacco pipe and is connected with secret tobacco pipe, the underground tobacco pipe stretches out behind the ground and is connected with the high temperature draught fan, the high temperature draught fan passes through the pipeline and is connected with middle header, middle header passes through the pipeline and is connected with preheater circulating fan, the steam inlet of preheater circulating fan exit linkage preheater, the preheater sets up two exhanst gas outlets, and an exhanst gas outlet passes through circulation line and gets into preheater circulating fan entry, and exhaust fan is established to another exhanst gas outlet, exhaust fan passes through the pipeline and is connected with the regional bell and spigot drying chamber of arrangement. The utility model discloses but fuel saving reduces the cost of enterprise, improves enterprise's comprehensive economic benefits.
Description
Technical Field
The utility model is suitable for a nodular cast-iron pipe production line waste heat utilization field specifically is continuous annealing stove slow cooling section high temperature flue gas waste heat utilization field.
Background
The continuous annealing furnace for nodular cast iron pipes is an important device for the production of nodular cast iron pipes. The water-cooling centrifugal nodular cast iron pipe has high cooling speed, in the process of quickly solidifying molten iron, 15-25% of eutectic cementite is produced in a metallographic structure, and the section of the pipe body is in a white state, so that the elongation is very low, and in order to improve the elongation, the water-cooling centrifugal cast nodular cast iron pipe needs to be subjected to high-temperature annealing treatment and is generally divided into a heating section, a heat preservation section, a quick cooling section and a slow cooling section according to the requirements of the annealing process. At present, a heating section and a heat preservation section adopt heat accumulating type burners, high-temperature flue gas in the heat preservation section of the heating section is reasonably utilized, but cold air needs to be blown into a cooling section for forced cooling, so that a large amount of high-temperature flue gas is generated after a furnace, and the high-temperature flue gas is directly discharged to the atmosphere without being recycled in the past, so that the smoke exhaust temperature of a unit is high, the heat loss is large, the heat consumption is high, and the energy waste is serious.
The preheating furnace of the cast tube packaging line is used for heating the outer wall of the cast tube before painting so that the coating can be uniformly attached to the surface of the cast tube; the heat source of the traditional cast tube preheating furnace is provided by a special hot air generating device, the hot air generating device comprises a combustion chamber, a burner, an air/gas pipeline, a combustion fan and the like, circulating air is heated by heat generated by burning of the burner, and hot air generated after heating enters the furnace through a hot air circulating system and a wind box to heat a cast tube.
The cast pipe in the finishing area needs to be washed by water after passing through the internal grinding station, the outer wall cleaning station needs to be carried out after the water is blown and poured through the bellmouth, and at the moment, the inner wall and the outer wall of the cast pipe have moisture, so that the subsequent outer wall cleaning effect is seriously influenced, and the cast pipe needs to be dried.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a continuous annealing stove waste heat utilization system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a continuous annealing stove waste heat utilization system, includes continuous annealing stove slow cooling section, its characterized in that: continuous type annealing stove slow cooling section passes through the rectangle tobacco pipe and is connected with secret tobacco pipe, secret tobacco pipe stretches out behind the ground and is connected with the high temperature draught fan, the high temperature draught fan passes through the pipeline and is connected with middle header, middle header passes through the pipeline and is connected with preheater circulating fan, the steam inlet of preheater circulating fan exit linkage preheater, the preheater sets up two exhanst gas outlets, and an exhanst gas outlet gets into preheater circulating fan entry through the circulation pipeline, and exhaust fan is established to another exhanst gas outlet, exhaust fan passes through the pipeline and is connected with the drying chamber.
Preferably, the furnace smoke of the slow cooling section of the continuous annealing furnace enters the underground smoke pipe through two rectangular smoke pipes.
Preferably, the underground smoke pipe extends out of the rear side wall of the ground and is provided with a suction air valve.
Preferably, an electronic adjusting valve A is arranged between the outlet of the intermediate header pipe and the inlet of the preheating furnace circulating fan.
Preferably, the electronic regulating valve B is arranged on a circulating pipeline of the preheating furnace connected with a circulating fan of the preheating furnace.
Compared with the prior art, the beneficial effects of the utility model are that: the waste heat recycling system of the continuous annealing furnace has the advantages of low investment cost and quick return on investment, and can completely utilize the waste heat at the operating cost except for manual maintenance equipment, thus the investment can be recovered in two years, a large amount of fuel is saved, the system is environment-friendly and energy-saving, and good economic benefit and social benefit can be brought to enterprises.
Description of the drawings:
FIG. 1 is a process flow diagram of the present invention.
Fig. 2 is a partial sectional view.
In the figure: 1 continuous annealing furnace slow cooling section, 2 rectangular smoke tube, 3 underground smoke tube, 4 cold air suction valve, 5 high temperature draught fan, 6 middle collecting tube, 7 electronic regulating valve A, 8 preheating furnace circulating fan, 9 preheating furnace, 10 electronic regulating valve B, 11 exhaust fan, 12 drying chamber
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a continuous annealing stove waste heat utilization system, includes continuous annealing stove slow cooling section 1, continuous annealing stove slow cooling section 1 is connected with secret tobacco pipe 3 through rectangle tobacco pipe 2, secret tobacco pipe 3 stretches out behind the ground and is connected with high temperature draught fan 5, high temperature draught fan 5 is connected with middle collector 6 through the pipeline, middle collector 6 is connected with preheater circulating fan 8 through the pipeline, the steam inlet of preheater circulating fan 8 exit linkage preheater 9, preheater 9 sets up two exhanst gas outlets, and an exhanst gas outlet passes through the circulating line and gets into preheater circulating fan 8 and enter the mouth, and exhaust fan 11 is established to another exhanst gas outlet, exhaust fan 11 passes through the pipeline and is connected with drying chamber 12.
Further, the furnace smoke of the slow cooling section 1 of the continuous annealing furnace enters an underground smoke pipe 3 through two rectangular smoke pipes 2.
Furthermore, the underground smoke pipe 3 is provided with a suction air valve 4 on the rear side wall extending out of the ground.
Further, an electronic regulating valve A7 is arranged between the outlet of the pipeline of the intermediate header 6 and the inlet of the circulating fan 8 of the preheating furnace
Furthermore, an electronic regulating valve B10 is arranged on a circulating pipeline of the preheating furnace 9 connected with the preheating furnace circulating fan 8.
The working principle is as follows: when the continuous annealing furnace slow cooling section 1 works, high-temperature flue gas enters an underground flue pipe 3 through a rectangular flue pipe 2, the flue gas is guided to an intermediate collecting pipe 6 by a high-temperature induced draft fan 5, then the flue gas is guided to a preheating furnace 9 by a preheating furnace circulating fan 8, and after a cast pipe is heated, most of the low-temperature flue gas returns to an inlet 8 of the preheating furnace circulating fan again to complete hot air circulation. And the high-temperature flue gas pipeline and the circulating air pipeline at the inlet of the circulating fan 8 of the preheating furnace are both provided with electronic regulating valves, and the flow of the waste heat tail gas is controlled according to the opening of the furnace temperature regulating valve, so that the aim of controlling the furnace temperature is fulfilled. And the redundant flue gas is led to a finishing area through a furnace top exhaust fan 11 to be subjected to a bell and spigot drying chamber 12, and the low-temperature flue gas is continuously utilized to dry the cast tube. The method applies the high-temperature flue gas of the slow cooling section of the continuous annealing furnace to the preheating furnace and the finishing area to carry out the bell and spigot drying chamber, does not influence the annealing furnace process, reduces the fuel consumption of the preheating furnace and saves the cost.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a continuous annealing stove waste heat utilization system, includes continuous annealing stove slow cooling section (1), its characterized in that: continuous type annealing stove slow cooling section (1) is connected with underground tobacco pipe (3) through rectangle tobacco pipe (2), underground tobacco pipe (3) stretch out behind the ground and are connected with high temperature draught fan (5), high temperature draught fan (5) are connected with middle collector (6) through the pipeline, middle collector (6) are connected with preheater circulating fan (8) through the pipeline, the steam inlet of preheater circulating fan (8) exit linkage preheater (9), preheater (9) set up two exhanst gas outlets, and an exhanst gas outlet gets into preheater circulating fan (8) entry through circulating line, and exhaust fan (11) are established to another exhanst gas outlet, exhaust fan (11) are connected with drying chamber (12) through the pipeline.
2. The continuous annealing furnace waste heat utilization system according to claim 1, characterized in that: the furnace smoke of the slow cooling section (1) of the continuous annealing furnace enters the underground smoke pipe (3) through the two rectangular smoke pipes (2).
3. The continuous annealing furnace waste heat utilization system according to claim 1, characterized in that: and the underground smoke pipe (3) extends out of the rear side wall of the ground and is provided with a suction air valve (4).
4. The continuous annealing furnace waste heat utilization system according to claim 1, characterized in that: an electronic regulating valve A (7) is arranged between the pipeline outlet of the intermediate header (6) and the inlet of the preheating furnace circulating fan (8).
5. The continuous annealing furnace waste heat utilization system according to claim 1, characterized in that: and an electronic adjusting valve B (10) is arranged on a circulating pipeline of the preheating furnace (9) connected with a circulating fan (8) of the preheating furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021402521.7U CN213447200U (en) | 2020-07-16 | 2020-07-16 | Waste heat utilization system of continuous annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021402521.7U CN213447200U (en) | 2020-07-16 | 2020-07-16 | Waste heat utilization system of continuous annealing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213447200U true CN213447200U (en) | 2021-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021402521.7U Active CN213447200U (en) | 2020-07-16 | 2020-07-16 | Waste heat utilization system of continuous annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213447200U (en) |
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2020
- 2020-07-16 CN CN202021402521.7U patent/CN213447200U/en active Active
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