Double-hearth kiln suspension cylinder residual air supply device for cooling finished product lime

Abstract

The utility model discloses a double-hearth kiln suspension cylinder residual air supply device for cooling finished lime. The double-hearth kiln suspension cylinder residual air supply device comprises a suspension cylinder fan unit which is connected with a suspension cylinder air inlet ring pipe through a suspension cylinder air pipe; the cooling fan unit is divided into two branch pipes through a cooling air pipe and a cooling air release valve, the two branch pipes are connected with ash discharge hoppers at the bottoms of the first chamber and the second chamber respectively, and a first electric control valve and a second electric control valve are arranged on the two branch pipes respectively; a connecting pipeline extends out of a suspension cylinder air pipe of the suspension cylinder fan unit to be connected with the cooling air pipe, and a check valve and a third electric control valve are sequentially arranged on the connecting pipeline to be connected with the cooling air pipe. Compared with the prior art, the utility model can solve the problems of high energy consumption and large equipment redundancy of the existing double-hearth kiln cooling hood and finished product lime cooling.

Description

Technical Field

[0001] The utility model relates to the technical field of steel material production and manufacturing, in particular to a cooling device for cooling finished lime products and utilizing the residual wind of a double-chamber kiln hanging cylinder to supply air. Background Art

[0002] The hanging cylinder system is the key core equipment of the Maerz kiln, which consists of a hanging cylinder fan (rated flow 6500m3 / h), hanging cylinder pipelines, hanging cylinder body, hanging cylinder castables and refractory bricks, instrument settings, etc. The double-chamber kiln includes chamber 1 3 and chamber 2 8 connected by an intermediate channel 2. The combustion-supporting air system includes a combustion-supporting air unit 1 connected to the top of chamber 1 3 through a combustion-supporting pipeline and a combustion-supporting air reversing valve 16, and the tops of chambers 1 3 and 8 are connected to the flue gas system; the hanging cylinder fan unit 6 is connected to the hanging cylinder air inlet ring pipe 9 through the hanging cylinder air duct 7; the cooling air system includes a cooling air unit 5 divided into two branch pipes through a cooling air duct 10 and a cooling air release valve 17, which are respectively connected to the ash hopper 4 at the bottom of chamber 1 3 and chamber 2 8, and the two branch pipes are respectively provided with an electric regulating valve 13 and an electric regulating valve 2 14. Since the internal structure of the suspension cylinder is a hollow structure made of heat-resistant stainless steel and is located in the calcination area in the middle of the kiln, in order to avoid deformation of the structure due to high temperature, at least two suspension cylinder fans are required to be connected in parallel to form two suspension cylinder fan units 6 to provide uninterrupted cooling and air supply to the two suspension cylinder bodies of the kiln (such as Figure 1 ), in order to prevent the castable at the bottom of the suspension cylinder from falling off and the refractory material from burning. A temperature measuring thermocouple 18 is set on the suspension cylinder structure pipeline to detect the heating of the suspension cylinder. Under normal circumstances, the temperature of the thermocouple 18 needs to be controlled within 200°C. If the temperature is too low, it will take away more heat from the kiln, so it is very important to reasonably control the temperature of the kiln suspension cylinder.

[0003] In the double-chamber kiln, all the materials in the kiln are piled on the unloading platform at the top of the ash hopper 13 and above the cooling hood. Under the action of the ash discharger, the materials move from top to bottom, and the cooling hood section is washed by the high-temperature finished product. In order to avoid damage to the cooling hood, the double-chamber kiln is equipped with a cooling fan 5 for cooling the finished product fan and the cooling hood. When the double-chamber kiln is burning, the cooling fan 5 cools the lime finished product on the upper end of the discharge platform and the cooling hood through the cooling air duct 10 (such as Figure 2 ).

[0004] The existing double-chamber kilns have a large number of fans, with nearly fourteen fans used for combustion and cooling alone. The equipment is obviously redundant and consumes a lot of electricity. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a double-chamber kiln hanging cylinder surplus air supply device for cooling finished lime, so as to solve the problems of high energy consumption and large equipment redundancy of the existing double-chamber kiln cooling hood and finished lime cooling.

[0006] In order to solve the above problems, the technical solution of the utility model is: the double-chamber kiln hanging cylinder surplus air supply device for cooling finished lime comprises a hanging cylinder fan unit connected to the hanging cylinder air inlet ring pipe through a hanging cylinder air duct; the cooling air unit is divided into two branch pipes through a cooling air duct and a cooling air release valve and is respectively connected to the ash discharge hopper at the bottom of the No. 1 chamber and the No. 2 chamber, and an electric regulating valve 1 and an electric regulating valve 2 are respectively provided on the two branch pipes. A connecting pipe extends from the hanging cylinder air duct of the hanging cylinder fan unit and is connected to the cooling air duct, and a check valve and an electric regulating valve 3 are sequentially provided on the connecting pipe and then connected to the cooling air duct.

[0007] In the above technical solution, a more specific solution may be: the connecting pipe is connected between the cooling air unit on the cooling air duct and the cooling air release valve.

[0008] Further: a flow meter is provided on the cooling air duct.

[0009] Further: the flow meter is arranged after the cooling air duct is connected to the connecting pipe.

[0010] Further: the flow meter is arranged between the cooling air release valve of the cooling air duct and the two branch pipes.

[0011] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0012] The double-chamber kiln hanging cylinder residual air supply device for cooling finished lime takes into account the common characteristics of the hanging cylinder cooling air and the cooling fan, which both have the functions of air supply and cooling, and increases the cooling air supply capacity of the hanging cylinder. A connecting pipe is added to connect the hanging cylinder fan unit to the cooling air duct, and a check valve and an electric regulating valve are added. A flow meter is used to replace the original cooling fan without distinguishing functions, and the residual air of the hanging cylinder fan unit is used to cool the kiln finished product and the cooling air cap, which not only reduces the redundancy of the equipment, but also effectively utilizes the capacity of the hanging cylinder fan, simplifies the production process, and reduces the power consumption of the whole process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the main view of the prior art;

[0014] Figure 2 is a top view of a cooling air system of the prior art;

[0015] Figure 3 It is a front view of an embodiment of the utility model;

[0016] Figure 4 It is a top view of the connection between the cooling air system and the suspension cylinder fan unit of the embodiment of the utility model;

[0017] Markings in the figure: combustion-supporting air unit 1, middle channel 2, No. 1 chamber 3, ash hopper 4, cooling air unit 5, suspension cylinder air unit 6, suspension cylinder air duct 7, No. 2 chamber 8, suspension cylinder air inlet ring pipe 9, cooling air duct 10, electric regulating valve three 12, electric regulating valve one 13, electric regulating valve two 14, combustion-supporting air reversing valve 16, cooling air release valve 17, thermocouple 18, connecting pipe 19, check valve 20, flow meter 21. DETAILED DESCRIPTION

[0018] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0019] like Figure 3 , Figure 4 The double-chamber kiln hanging cylinder residual air supply device for cooling finished lime shown in the figure includes a hanging cylinder air unit 6 connected to a hanging cylinder air inlet ring pipe 9 through a hanging cylinder air duct 7; a cooling air unit 5 is divided into two branch pipes through a cooling air duct 10 and a cooling air release valve 17, respectively connected to the ash discharge hopper 4 at the bottom of the first chamber and the second chamber, and the two branch pipes are respectively provided with an electric regulating valve 13 and an electric regulating valve 2 14, and a connecting pipe 19 extends from the hanging cylinder air duct 7 of the hanging cylinder air unit 6 to connect to the cooling air duct 10, and the connecting pipe 19 is sequentially provided with a check valve 20 and an electric regulating valve 3 12 and then connected to the cooling air duct 10. The connecting pipe 19 is connected between the cooling air unit 5 and the cooling air release valve 17 on the cooling air duct 10. A flow meter 21 is provided on the cooling air duct 10. The flow meter 21 is provided after the cooling air duct 10 is connected to the connecting pipe 19. The flow meter 21 is provided between the cooling air release valve 17 and the two branch pipes of the cooling air duct 10. The design of the flow meter can monitor the cooling air flow.

[0020] When the No. 1 chamber 3 is used as a combustion chamber for combustion, the cooling air release valve 17 is in a closed, vertical state, the electric regulating valve three 12 is opened, the electric regulating valve one 13 and the electric regulating valve two 14 are opened, so that the hanging cylinder fan unit 6 sends cooling air into the kiln to cool the finished lime and the cooling air cap. By adjusting the opening of the electric regulating valve three 12, or adjusting the cooling fan frequency, the flow meter 21 reaches a predetermined value. At the same time, the thermocouple 18 set at the air outlet of the hanging cylinder air duct 7 is used to detect the air supply of the hanging cylinder. When the thermocouple 18 is greater than the temperature setting value, the thermocouple can be lower than the temperature setting value by increasing the speed of the hanging cylinder fan unit 6 or reducing the opening of the electric regulating valve three 12.

[0021] When the No. 2 chamber 8 is used as a combustion chamber for combustion, the cooling air release valve 17 is in a closed, vertical state, the electric regulating valve three 12 is opened, the electric regulating valve one 13 and the electric regulating valve two 14 are opened, so that the hanging cylinder fan unit 6 sends cooling air into the kiln to cool the finished lime and the cooling air cap. By adjusting the opening of the electric regulating valve three 12, or adjusting the cooling fan frequency, the flow meter 21 reaches a predetermined value. At the same time, the thermocouple 18 set at the air outlet of the hanging cylinder air duct 7 is used to detect the air supply of the hanging cylinder. When the thermocouple 18 is greater than the temperature setting value, the thermocouple can be lower than the temperature setting value by increasing the speed of the hanging cylinder fan unit 6 or reducing the opening of the electric regulating valve three 12.

[0022] During the kiln reversal, the cooling air release valve 17 is opened, the electric regulating valve 3 12 is closed, and the suspension cylinder fan unit 6 frequency conversion reduces the speed to make the temperature of the thermocouple 18 within the set value area. The purpose of setting the check valve 20 is mainly because the suspension cylinder pipeline pressure is higher than the cooling air duct pressure, and at the same time to ensure the normal operation of the suspension cylinder cooling system.

[0023] The double-chamber kiln hanging cylinder residual air supply device for cooling finished lime takes into account the common characteristics of the hanging cylinder cooling air and the cooling fan, which both have the functions of air supply and cooling, and increases the cooling air supply capacity of the hanging cylinder. A connecting pipe is added to connect the hanging cylinder fan unit to the cooling air duct, and a check valve and an electric regulating valve are added. A flow meter is used to replace the original cooling fan without distinguishing functions, and the residual air of the hanging cylinder fan unit is used to cool the kiln finished product and the cooling air cap, which not only reduces the redundancy of the equipment, but also effectively utilizes the capacity of the hanging cylinder fan, simplifies the production process, and reduces the power consumption of the whole process.

Claims

1. A double-chamber kiln hanging cylinder residual air supply device for cooling finished lime, comprising a hanging cylinder air unit (6) connected to a hanging cylinder air inlet ring pipe (9) via a hanging cylinder air duct (7); a cooling air unit (5) is divided into two branch pipes through a cooling air duct (10) and a cooling air release valve (17) and connected to the ash discharge hopper (4) at the bottom of the first chamber and the bottom of the second chamber respectively, and the two branch pipes are respectively provided with an electric regulating valve 1 (13) and an electric regulating valve 2 (14), characterized in that: A connecting pipe (19) extends from the suspension cylinder air duct (7) of the suspension cylinder fan unit (6) and is connected to the cooling air duct (10); a check valve (20) and an electric regulating valve (12) are sequentially arranged on the connecting pipe (19) and then connected to the cooling air duct (10).

2. The double-chamber kiln hanging cylinder surplus air supply device for cooling finished lime according to claim 1, characterized in that: The connecting pipe (19) is connected between the cooling air unit (5) and the cooling air release valve (17) on the cooling air duct (10).

3. The double-chamber kiln hanging cylinder surplus air supply device for cooling finished lime according to claim 2, characterized in that: The cooling air duct (10) is provided with a flow meter (21).

4. The double-chamber kiln hanging cylinder surplus air supply device for cooling finished lime according to claim 3, characterized in that: The flow meter (21) is arranged after the cooling air duct (10) is connected to the connecting pipe (19).

5. The double-chamber kiln hanging cylinder surplus air supply device for cooling finished lime according to claim 4, characterized in that: The flow meter (21) is arranged at a position between the cooling air release valve (17) of the cooling air duct (10) and the two branch pipes.

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