Integrated double-hearth kiln combustion-supporting air supply and suspension cylinder cooling device

Abstract

The utility model discloses an integrated combustion-supporting air supply and suspension cylinder cooling device for a double-hearth kiln, which relates to the technical field of kilns and comprises a combustion-supporting fan, a suspension cylinder air inlet ring pipe, a suspension cylinder air outlet ring pipe, a suspension cylinder air inlet pipeline, a suspension cylinder air outlet pipeline, a diesel fan, a combustion-supporting air pipeline, a combustion-supporting air release valve, a thermocouple, a first manual valve, a second manual valve and a third manual valve. A first electric control valve, a second electric control valve, a flow meter and a connecting pipeline; the combustion-supporting fan is connected with the kiln through a combustion-supporting air pipeline; the combustion-supporting air release valve and the first electric control valve are mounted on the combustion-supporting air pipeline; one end of the suspension cylinder air outlet pipeline is communicated with the suspension cylinder air outlet ring pipe, and the other end is connected with a combustion-supporting air pipeline through a first manual valve and led to the atmosphere through a second manual valve; and the thermocouple and the flow meter are arranged on the air outlet pipeline of the suspension cylinder. The utility model can solve the problems that a combustion fan system and a suspension cylinder cooling system of the existing double-hearth kiln are independently arranged and run, the number of required fans is large, waste is caused, and the process operation is not optimized enough.

Description

Technical Field

[0001] The utility model relates to the technical field of lime kilns, in particular to an integrated control device for a double-chamber kiln to simultaneously control combustion-supporting air supply and suspension cylinder cooling. Background Art

[0002] The suspension cylinder system is the key core equipment of Maerz kiln, which consists of suspension cylinder fan, suspension cylinder pipeline, suspension cylinder body, suspension cylinder castable and refractory bricks, instrument settings, etc. Since the internal structure of the suspension cylinder is a hollow structure made of heat-resistant stainless steel and is located in the calcination part of the kiln, in order to avoid deformation of the structure due to high temperature, at least two suspension cylinder fans are required to continuously cool and supply air to the two suspension cylinder bodies of the kiln, such as Figure 1 The hanging cylinder fan 6 and the diesel fan 11 are used to prevent the castable at the bottom of the hanging cylinder from falling off and the refractory material from burning.

[0003] A diesel fan 11 is provided in the suspension cylinder cooling system, and is used to replace the suspension cylinder fan 6 for emergency cooling of the suspension cylinder in the event of a power outage.

[0004] During production, the suspension cylinder fan 6 supplies air to the kiln body suspension cylinder through the suspension cylinder air inlet ring pipe 9, and then the preheated suspension cylinder air passes through the suspension cylinder air outlet pipe 10 and the first manual valve 16, flows back to the combustion air pipe 12, and passes through the combustion air release valve 13 to supply air to the kiln. During the kiln shutdown period, the combustion air fan stops 1, the suspension cylinder fan 6 continues to run, the first manual valve 16 is closed, and the second manual valve 17 is opened, so that the suspension cylinder cooling air can be discharged to the atmosphere.

[0005] The existing double-chamber kiln has a large number of fans, and there are nearly 14 fans used only for combustion and cooling. In order to optimize the process operation, it is possible to consider incorporating the hanging cylinder fan into the combustion fan system to simplify the number of fans. In this regard, certain optimization adjustments can be made. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an integrated double-chamber kiln combustion-supporting air supply and suspension cylinder cooling device, which can solve the problems that the existing double-chamber kiln combustion-supporting fan system and the suspension cylinder cooling system are set up and operated separately, a large number of fans are required, resulting in waste and insufficient optimization of process operation.

[0007] In order to solve the above problems, the technical solution of the utility model is: this integrated double-chamber kiln combustion-supporting air supply and suspension cylinder cooling device includes a combustion-supporting fan, a suspension cylinder air outlet ring pipe, a suspension cylinder air inlet pipe, a suspension cylinder air inlet ring pipe, a suspension cylinder air outlet pipe, a diesel fan, a combustion-supporting air pipe, a combustion-supporting air release valve, a thermocouple, a first manual valve and a second manual valve, and also includes a third manual valve, a first electric regulating valve, a second electric regulating valve and a flow meter and a connecting pipe;

[0008] The combustion-supporting fan is connected to the kiln through the combustion-supporting air duct to supply air into the kiln. The combustion-supporting air release valve is installed on a section of the combustion-supporting air duct near the kiln air inlet. The first electric regulating valve is installed on a section of the combustion-supporting air duct near the combustion-supporting fan. One end of the hanging cylinder air outlet duct is connected to the hanging cylinder air outlet ring pipe; the other end is connected to the combustion-supporting air duct after the first electric regulating valve through the first manual valve, and is connected to the atmosphere through the second manual valve; the thermocouple and the flow meter are installed on the hanging cylinder air outlet duct.

[0009] The diesel blower is connected with the suspension cylinder air inlet ring pipe through the suspension cylinder air inlet duct; before the connection point between the suspension cylinder air outlet duct and the combustion-supporting air duct on the combustion-supporting air duct, one end of the connecting duct is connected with the suspension cylinder air inlet duct, and the other end is connected with the combustion-supporting air duct; the electric regulating valve and the third manual valve are arranged on the connecting duct.

[0010] In the above technical solution, a more specific solution is: the combustion-supporting fan is a variable frequency fan, model ARMG400.

[0011] Further: The rated power of the combustion-supporting fan is 420kw, and the rated air volume is 15000m 3 / h.

[0012] Further: the specifications of the first electric regulating valve and the second electric regulating valve are respectively: 380V, 1.1kw.

[0013] Further: the flow meter is a flow meter including a flow orifice plate.

[0014] Further: the specification model of the thermocouple is: thermal resistance thermometer Pt100, diameter 8mm; L=150mm, including the installation joint; the thermocouple controls the temperature within 200°C.

[0015] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0016] 1) When the original system is running, during the reversing period, the combustion-supporting air release valve is open and the combustion-supporting fan maintains continuous high-speed operation; while the utility model can achieve that the combustion-supporting fan maintains continuous operation during the reversing period, effectively utilizing the air supply volume of the combustion-supporting fan, avoiding waste and reducing energy consumption.

[0017] 2) The utility model can effectively protect the suspension cylinder system and realize redundant design through automatic program setting.

[0018] 3) Under the setting state of the utility model, the dynamic adjustment of the suspension cylinder system can be effectively achieved through the operation of the combustion-supporting fan frequency, the first electric regulating valve and the second electric regulating valve.

[0019] 4) When the kiln is stopped, the utility model can avoid wasting fan air volume and effectively reduce power consumption by reducing the frequency of the combustion-supporting fan and monitoring the changes in the cooling air flow meter and temperature of the hanging cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the prior art structure;

[0021] Figure 2 It is a schematic diagram of the structure of the utility model.

[0022] The numbers in the figure represent:

[0023] 1. Combustion-supporting fan, 2. Middle channel, 3. No. 1 chamber, 4. Suspension cylinder air outlet ring pipe, 5. Cooling fan, 6. Suspension cylinder fan, 7. Suspension cylinder air duct, 8. No. 2 chamber, 9. Suspension cylinder air inlet ring pipe, 10. Suspension cylinder air outlet duct, 11. Diesel fan, 12. Combustion-supporting air duct, 13. Combustion-supporting air release valve, 14. Cooling air release valve, 15. Thermocouple, 16. First manual valve, 17. Second manual valve, 18. Third manual valve, 19. First electric regulating valve, 20. Second electric regulating valve, 21. Flow meter, 22. Connecting pipe. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0025] Figure 1 This is a schematic diagram of the prior art structure. The working principle and existing problems have been described in detail in the background technology section and will not be repeated here. Figure 1 and Figure 2 Reference numerals or components not specifically mentioned herein are part of the prior art.

[0026] Figure 2 The integrated double-chamber kiln combustion-supporting air supply and suspension cylinder cooling device includes a combustion-supporting fan 1, a suspension cylinder outlet air ring pipe 4, a cooling fan 5, a suspension cylinder air duct 7, a suspension cylinder air inlet ring pipe 9, a suspension cylinder outlet duct 10, a diesel fan 11, a combustion-supporting air duct 12, a combustion-supporting air release valve 13, a cooling air release valve 14, a thermocouple 15, a first manual valve 16, a second manual valve 17, a third manual valve 18, a first electric regulating valve 19, a second electric regulating valve 20 and a flow meter 21 and a connecting pipe 22.

[0027] The combustion-supporting fan 1 is connected to the kiln through the combustion-supporting air duct 12 to supply air to the kiln. The combustion-supporting fan 1 is provided with a variable frequency control, that is, the combustion-supporting fan 1 adopts a variable frequency fan. The rated power of the combustion-supporting fan 1 is 420kw, and the rated air supply volume is 15000m 3 / h; the combustion air release valve 13 is installed on a section of the combustion air duct 12 close to the air inlet of the kiln, and the first electric regulating valve 19 is installed on a section of the combustion air duct 12 close to the combustion air fan 1; the specification model of the first electric regulating valve 19 is: 380V, 1.1kw.

[0028] One end of the suspension cylinder air outlet duct 10 is connected to the suspension cylinder air outlet ring pipe 4; the other end is connected to the combustion air duct 12 after the first electric regulating valve 19 through the first manual valve 16, and leads to the atmosphere through the second manual valve 17; the thermocouple 15 and the flow meter 21 are installed on the suspension cylinder air outlet duct 10; the specification model of the thermocouple 15 is: thermal resistance thermometer Pt100, diameter 8mm; L=150mm, including the installation joint; the flow meter 21 is a flow meter including a flow orifice.

[0029] The diesel blower 11 is connected to the suspension cylinder air inlet ring pipe 9 through the suspension cylinder air inlet duct 7.

[0030] Before the connection point between the hanging cylinder air outlet duct 10 and the combustion-supporting air duct 12 on the combustion-supporting air duct 12, the hanging cylinder air inlet duct 7 is connected to the combustion-supporting air duct 12 via a connecting duct 22; a second electric regulating valve 20 and a third manual valve 18 are sequentially arranged on the connecting duct 22; the specification model of the second electric regulating valve 20 is: 380V, 1.1kw.

[0031] In the kiln production state, the first manual valve 16 is normally open, the third manual valve 18 is normally open, the first electric regulating valve 19 is normally open, and the second electric regulating valve 20 is normally open; one branch of the combustion-supporting fan 1 supplies air to the kiln body suspension cylinder through the second electric regulating valve 20, the third manual valve 18, the suspension cylinder air inlet pipe 7 and the suspension cylinder air inlet ring pipe 9 of the connecting pipe 22, and then the preheated suspension cylinder air passes through the suspension cylinder air outlet pipe 10 and the first manual valve 16, flows back to the combustion-supporting air pipe 12, and supplies air to the kiln through the combustion-supporting air release valve 13. Another branch of the combustion-supporting fan 1 supplies air to the kiln through the electric regulating valve 19 and the combustion-supporting air release valve 13 on the combustion-supporting air pipe 12. By adjusting the frequency 1 of the combustion-supporting fan 1, the first electric regulating valve 19, and the second electric regulating valve 20, good control of the air supply volume of the suspension cylinder is achieved; the thermocouple controls the temperature within 200°C.

[0032] During the kiln shutdown period, the combustion-supporting fan 1 continues to operate, the first manual valve 16 is closed, and the second manual valve 17 is opened, so that the cooling air of the suspension cylinder can be discharged to the atmosphere.

[0033] In the case of a power outage, the third manual valve 18 can be closed and the diesel fan 11 can be turned on to achieve emergency cooling of the kiln.

[0034] During reversing, the combustion air release valve 13 is opened and the first electric regulating valve 19 is closed. Good cooling of the suspension cylinder system can be achieved by reducing the frequency of the combustion air fan 1, that is, the combustion air fan 1 does not need to be stopped during reversing, effectively reducing energy consumption.

[0035] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Claims

1. An integrated double-chamber kiln combustion-supporting air supply and suspension cylinder cooling device, comprising a combustion-supporting air fan (1), a suspension cylinder air outlet ring pipe (4), a suspension cylinder air inlet duct (7), a suspension cylinder air inlet ring pipe (9), a suspension cylinder air outlet duct (10), a diesel fan (11), a combustion-supporting air duct (12), a combustion-supporting air release valve (13), a thermocouple (15), a first manual valve (16) and a second manual valve (17), characterized in that: It also includes a third manual valve (18), a first electric regulating valve (19), a second electric regulating valve (20), a flow meter (21), and a connecting pipeline (22); The combustion-supporting fan (1) is connected to the kiln through the combustion-supporting air duct (12); the combustion-supporting air release valve (13) and the first electric regulating valve (19) are installed on the combustion-supporting air duct (12); one end of the suspension cylinder air outlet duct (10) is connected to the suspension cylinder air outlet ring pipe (4), and the other end is connected to the combustion-supporting air duct (12) through the first manual valve (16), and is connected to the atmosphere through the second manual valve (17); the thermocouple (15) and the flow meter (21) are installed on the suspension cylinder air outlet duct (10); The diesel fan (11) is connected to the suspension cylinder air inlet ring pipe (9) through the suspension cylinder air inlet pipe (7); One end of the connecting pipe (22) is connected to the suspension cylinder air inlet pipe (7), and the other end is connected to the combustion-supporting air pipe (12); the electric regulating valve (20) and the third manual valve (18) are arranged on the connecting pipe (22).

2. The integrated double-chamber kiln combustion-supporting air supply and suspension cylinder cooling device according to claim 1 is characterized in that: The combustion-supporting fan (1) is a variable frequency fan, model ARMG400.

3. The integrated double-chamber kiln combustion-supporting air supply and suspension cylinder cooling device according to claim 1 or 2, characterized in that: The combustion-supporting fan (1) has a rated power of 420 kW and a rated air volume of 15,000 m 3 / h.

4. The integrated double-chamber kiln combustion-supporting air supply and suspension cylinder cooling device according to claim 3 is characterized in that: The specifications of the first electric regulating valve (19) and the second electric regulating valve (20) are respectively: 380V, 1.1kw.

5. The integrated double-chamber kiln combustion-supporting air supply and suspension cylinder cooling device according to claim 4 is characterized in that: The flow meter (21) is a flow meter comprising a flow orifice plate.

6. The integrated double-chamber kiln combustion-supporting air supply and suspension cylinder cooling device according to claim 5 is characterized in that: The specification model of the thermocouple (15) is: thermal resistance thermometer Pt100, diameter 8mm; L=150mm, including the installation joint; the thermocouple controls the temperature within 200°C.

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