Heat recycling system in production of high-purity aluminate binding agent

Abstract

The utility model relates to the technical field of aluminate binder production, in particular to a heat recycling system in high-purity aluminate binder production. The heat recycling system in the production of the high-purity aluminate binding agent comprises a first-stage storage tank, the first-stage storage tank is connected with a mixing and homogenizing tank through a first-stage filter, the mixing and homogenizing tank is connected with a micro-drying oven through a ball pressing device, the micro-drying oven is connected with a crusher through a calcining kiln, a heating calcining area and a cooling area are arranged in the calcining kiln, and the heating calcining area is connected with the cooling area. And an interactive heat exchanger is connected to the heating calcining area. According to the system, through the arrangement of the box-type heat exchanger, flue gas at the joint of the heating calcining area and the cooling area is subjected to heat exchange treatment, heated air enters the cooling area after heat exchange is completed, a binding agent is softly cooled, and the problem that the product quality is affected due to micro cracks on the internal structure is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminate binder production, in particular to a heat recovery and utilization system in the production of high-purity aluminate binder. Background Art

[0002] High-purity aluminate binder is an important chemical raw material, widely used in refractory materials, building materials, chemicals, medicine and other fields. High-purity aluminate binder is mainly composed of mineral phases such as calcium aluminate (CaO·Al2O3), calcium dialuminate (CaO·2Al2O3) and calcium dodecaaluminate (3CaO·2Al2O3).

[0003] In actual production, heat recovery is one of the important measures to reduce energy consumption. In existing devices, the heat energy of kiln flue gas is not fully utilized. It is only used to heat water through a heat exchanger to improve winter heating. In production, there is also air that directly enters the cooling zone pipe. Due to its low temperature, the binder cools down too quickly, causing micro cracks in the internal structure and affecting product quality. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide a heat recovery and utilization system in the production of high-purity aluminate binder. Through the setting of an interactive heat exchanger, the high-temperature flue gas in the heating and calcining zone is subjected to heat exchange treatment, and the heated air enters the micro-oven to dry the free water in the spherical raw materials, which greatly improves the finished product rate of the raw materials and improves the heat recovery and reuse rate; through the setting of a box-type heat exchanger, the flue gas at the connection between the heating and calcining zone and the cooling zone is subjected to heat exchange treatment, and the heated air after the heat exchange is completed enters the cooling zone to gently cool the binder, thereby avoiding the occurrence of microcracks in the internal structure and affecting the occurrence of product quality problems.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The heat recovery and utilization system in the production of high-purity aluminate binder includes a primary storage tank, which is connected to a mixing and homogenizing tank through a primary filter, and the mixing and homogenizing tank is connected to a micro-oven through a ball press, and the micro-oven is connected to a crusher through a calcining kiln. A heating calcining zone and a cooling zone are arranged inside the calcining kiln, and an interactive heat exchanger is connected to the heating calcining zone.

[0007] The heat recovery and utilization system in the production of high-purity aluminate binder also includes a secondary storage tank, which is connected to the mixing and homogenizing tank through a secondary filter.

[0008] An inlet induced draft fan for the interactive heat exchanger is arranged between the temperature-raising calcining zone and the interactive heat exchanger, and an outlet pipeline for the interactive heat exchanger is connected to the interactive heat exchanger.

[0009] The interactive heat exchanger is connected with an air inlet pipeline, and the interactive heat exchanger is connected with the micro oven through an induced draft fan out of the interactive heat exchanger.

[0010] The cooling zone is connected to the box-type heat exchanger through the box-type heat exchanger inlet induced draft fan, and the box-type heat exchanger is connected to the outlet box-type heat exchanger pipeline. The connection between the box-type heat exchanger inlet induced draft fan and the cooling zone is located near the heating calcining zone, specifically, at the connection between the heating calcining zone and the cooling zone. The connection between the cooling zone inlet pipeline and the cooling zone is located in the middle and rear section of the cooling zone.

[0011] The box-type heat exchanger is connected with a blower, and the box-type heat exchanger is connected with the cooling zone through a cooling zone inlet pipeline.

[0012] The purpose of introducing the pipe into the cooling zone is that the rate of cooling is too slow if the cooling zone itself is relied upon for cooling, while directly introducing air will affect the microstructure.

[0013] The working principle of the utility model is:

[0014] The raw materials in the primary storage tank are filtered through the primary filter and then enter the mixing and homogenizing tank. The raw materials in the secondary storage tank enter the mixing and homogenizing tank through the secondary storage tank. After being evenly mixed in the mixing and homogenizing tank, they enter the ball press and then enter the calcining kiln through the micro oven. After sintering and cooling, they enter the crusher for processing. The high-temperature flue gas in the heating and calcining zone enters the interactive heat exchanger through the interactive heat exchanger induced draft fan, and the air enters the interactive heat exchanger through the air inlet pipe. The air after heat exchange enters the micro oven through the interactive heat exchanger induced draft fan to dry the spheres. The tail gas at the connection between the cooling zone and the heating and calcining zone enters the box heat exchanger through the box heat exchanger induced draft fan, and then the blower pumps the air into the blower. After the heat exchange is completed, the hot air enters the middle and rear section of the cooling zone. Among them, the connection between the box heat exchanger induced draft fan and the cooling zone is located near the side of the heating and calcining zone, specifically, at the connection between the heating and calcining zone and the cooling zone. The connection between the cooling zone inlet pipe and the cooling zone is located in the middle and rear section of the cooling zone.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model is adopted to adopt the heat recovery and utilization system in the production of high-purity aluminate binder. Through the setting of interactive heat exchangers, the high-temperature flue gas in the heating and calcining zone is subjected to heat exchange treatment. The heated air enters the micro-oven to dry the free water in the spherical raw materials, which greatly improves the finished product rate of the raw materials and the heat recovery and reuse rate. Through the setting of box-type heat exchangers, the flue gas at the connection between the heating and calcining zone and the cooling zone is subjected to heat exchange treatment. After the heat exchange is completed, the heated air enters the cooling zone to gently cool the binder, avoiding the occurrence of micro cracks in the internal structure and the occurrence of problems affecting product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the heat recovery and utilization system in the production of high-purity aluminate binder of the utility model;

[0018] In the figure: 1. Primary storage tank; 2. Secondary storage tank; 3. Primary filter; 4. Secondary filter; 5. Mixing and homogenizing tank; 6. Ball press; 7. Micro oven; 8. Calcination kiln; 9. Crusher; 10. Interactive heat exchanger; 11. Box heat exchanger; 12. Heating and calcining zone; 13. Cooling zone; 14. Draft fan entering interactive heat exchanger; 15. Interactive heat exchanger outlet duct; 16. Air entering duct; 17. Draft fan exiting interactive heat exchanger; 18. Draft fan entering box heat exchanger; 19. Outlet duct of box heat exchanger; 20. Blower; 21. Inlet duct of cooling zone. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] Example 1

[0021] like Figure 1As shown, the heat recovery and utilization system in the production of high-purity aluminate binder includes a primary storage tank 1, which is connected to a mixing and homogenizing tank 5 through a primary filter 3, and the mixing and homogenizing tank 5 is connected to a micro oven 7 through a ball press 6, and the micro oven 7 is connected to a crusher 9 through a calcining kiln 8. The calcining kiln 8 is provided with a temperature rise calcining zone 12 and a cooling zone 13, and the temperature rise calcining zone 12 is connected to an interactive heat exchanger 10. It also includes a secondary storage tank 2, which is connected to the mixing and homogenizing tank 5 through a secondary filter 4. An inlet induced draft fan 14 of the interactive heat exchanger is provided between the temperature rise calcining zone 12 and the interactive heat exchanger 10, and an outlet duct 15 of the interactive heat exchanger is connected to the interactive heat exchanger 10. An air inlet duct 16 is connected to the interactive heat exchanger 10, and the interactive heat exchanger 10 is connected to the micro oven 7 through an outlet induced draft fan 17 of the interactive heat exchanger. The cooling zone 13 is connected to the box-type heat exchanger 11 through the box-type heat exchanger inlet induced draft fan 18, and the box-type heat exchanger 11 is connected to the box-type heat exchanger outlet pipe 19. The box-type heat exchanger 11 is connected to the blower 20, and the box-type heat exchanger 11 is connected to the cooling zone 13 through the cooling zone inlet pipe 21. The purpose of introducing the cooling zone inlet pipe 21 is that the cooling rate is too slow if the cooling zone 13 itself is cooled down, and the microstructure will be affected by directly introducing air.

[0022] The heat recovery and utilization system in the production of the high-purity aluminate binder, when in operation, comprises the following steps:

[0023] (1) The raw materials in the primary storage tank 1 are filtered through the primary filter 3 and then enter the mixing and homogenizing tank 5. The raw materials in the secondary storage tank 2 are filtered through the secondary filter 4 and then enter the mixing and homogenizing tank 5. After being evenly mixed in the mixing and homogenizing tank 5, they enter the ball press 6, and then enter the calcining kiln 8 through the micro oven 7. After sintering and cooling, they enter the crusher 9 for processing; (2) The high-temperature flue gas in the heating and calcining zone 12 enters the interactive heat exchanger 10 through the interactive heat exchanger induced draft fan 14, and the air enters the interactive heat exchanger 10 through the air inlet pipe 16. The air after heat exchange enters the micro oven 7 through the interactive heat exchanger induced draft fan 17 to dry the spheres; (2) The exhaust gas at the connection between the cooling zone 13 and the heating and calcining zone 12 enters the box heat exchanger 11 through the box heat exchanger induced draft fan 18, and then the blower 20 pumps the air into the box heat exchanger 11. After the heat exchange is completed, the hot air enters the middle and rear sections of the cooling zone 13.

Claims

1. A heat recovery system in the production of high-purity aluminate binder, characterized in that: The invention comprises a primary storage tank (1), wherein the primary storage tank (1) is connected to a mixing and homogenizing tank (5) via a primary filter (3), the mixing and homogenizing tank (5) is connected to a micro oven (7) via a ball press (6), the micro oven (7) is connected to a crusher (9) via a calcining kiln (8), a heating calcining zone (12) and a cooling zone (13) are arranged inside the calcining kiln (8), and an interactive heat exchanger (10) is connected to the heating calcining zone (12).

2. The heat recovery and utilization system in the production of high-purity aluminate binder according to claim 1, characterized in that: It also includes a secondary storage tank (2), which is connected to the mixing and homogenizing tank (5) via a secondary filter (4).

3. The heat recovery and utilization system in the production of high-purity aluminate binder according to claim 1, characterized in that: An interactive heat exchanger inlet induced draft fan (14) is provided between the temperature-raising calcination zone (12) and the interactive heat exchanger (10), and an interactive heat exchanger outlet pipeline (15) is connected to the interactive heat exchanger (10).

4. The heat recovery and utilization system in the production of high-purity aluminate binder according to claim 1, characterized in that: The interactive heat exchanger (10) is connected to an air inlet pipe (16), and the interactive heat exchanger (10) is connected to the micro oven (7) via an interactive heat exchanger exhaust fan (17).

5. The heat recovery and utilization system in the production of high-purity aluminate binder according to claim 1, characterized in that: The cooling zone (13) is connected to the box-type heat exchanger (11) via an inlet box-type heat exchanger induced draft fan (18), and the box-type heat exchanger (11) is connected to an outlet box-type heat exchanger pipeline (19).

6. The heat recovery and utilization system in the production of high-purity aluminate binder according to claim 5, characterized in that: The box-type heat exchanger (11) is connected to a blower (20), and the box-type heat exchanger (11) is connected to the cooling zone (13) via a cooling zone inlet pipe (21).

Images