Cement kiln co-processing sludge drying system

Abstract

The utility model discloses a cement kiln co-processing sludge drying system which comprises a decomposing furnace and a rotary kiln, the outer side end of the rotary kiln is fixedly connected with an air collecting cover, a cavity is arranged in the air collecting cover, the surface of the air collecting cover is fixedly connected with an air inlet and an air outlet respectively, the inner wall of the cavity is fixedly connected with a spiral baffle, and the spiral baffle is fixedly connected with an air outlet. The air outlet is fixedly connected with an induced draft fan, the output end of the induced draft fan is fixedly connected with a stirring type drying machine, a hot air outlet of the stirring type drying machine is fixedly connected with a connecting pipe, the end, away from the stirring type drying machine, of the connecting pipe is fixedly connected with an air feeder, and the output end of the air feeder is fixedly connected with an air inlet pipe. External air is sucked into the air collecting cover through the induced draft fan, heat on the surface of the rotary kiln is used for heating the sucked air, hot air is fed into the stirring type drying machine to be used, the existence time of the hot air in the air collecting cover is prolonged through the spiral baffle, and the temperature of the hot air is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to cement industry environmental protection field, concretely is a cement kiln collaborative disposal sludge drying system. BACKGROUND

[0002] Cement kiln collaborative disposal sludge is a full-process clean waste disposal method, which uses the high-temperature environment of the cement production process to incinerate sludge, and the alkaline environment in the kiln can effectively prevent the volatilization of acidic substances and heavy metals.

[0003] Publication No. "CN214991095U", patent name "a cement kiln collaborative disposal sludge drying system", including: set up in the air collector on the rotary kiln, the air collector is located on the kiln head end of rotary kiln and is provided with exhaust hole, the air collector is located on the kiln tail end of rotary kiln and is provided with multiple air inlet; The outside of the air collector is provided with a induced draft fan and a stirring dryer, one end of the stirring dryer is provided with a sludge feeding port and a hot air inlet, the other end is provided with a sludge discharge port and an exhaust port, the sludge feeding port is located at the upper end of the hot air inlet, and the sludge discharge port is located at the lower end of the exhaust port; One end of the induced draft fan is connected with the exhaust hole, and the other end is connected with the hot air inlet of the stirring dryer.

[0004] In the above-mentioned scheme, the waste such as sludge with high water content is dried by using the surface residual heat of the rotary kiln in the clinker firing system, which realizes sludge reduction, recovers the residual heat of the firing system and saves the collaborative disposal cost. However, the air travels in a straight line in the air collector, which makes the air stay in the air collector for a short time, resulting in that the air absorbs less heat and the drying time of the waste such as sludge is longer. Utility model content

[0005] The utility model aims at providing a cement kiln collaborative disposal sludge drying system, which can improve the travel distance of air in the air collector, prolong the stay time of air in the air collector, thereby improving the heat absorbed by air and increasing the air temperature.

[0006] In order to achieve the above object, a cement kiln collaborative disposal sludge drying system is provided, which comprises a decomposition furnace and a rotary kiln, the rotary kiln is installed on the decomposition furnace, the outer side end of the rotary kiln is fixedly connected with a wind collecting hood, and the rotary kiln penetrates through the middle part of the wind collecting hood, the wind collecting hood is provided with a cavity, and the rotary kiln is located in the middle part of the cavity, the surface of the wind collecting hood is fixedly connected with an air inlet and an air outlet respectively, and the air inlet and the air outlet penetrate through the wind collecting hood respectively, the air inlet and the air outlet are communicated with the cavity respectively, and the air inlet and the air outlet are located at two ends of the cavity respectively, the inner wall of the cavity is fixedly connected with a spiral baffle, and the rotary kiln penetrates through the middle part of the spiral baffle and is threadedly connected with the spiral baffle, the air outlet is fixedly connected with a draft fan, and the air outlet is communicated with the input end of the draft fan, the output end of the draft fan is fixedly connected with a stirring dryer, and the output end of the draft fan is communicated with the hot air inlet of the stirring dryer, the hot air outlet of the stirring dryer is fixedly connected with a connecting pipe, one end of the connecting pipe away from the stirring dryer is fixedly connected with a air feeder, and the connecting pipe is communicated with the input end of the air feeder, the output end of the air feeder is fixedly connected with an air inlet pipe, one end of the air inlet pipe away from the air feeder is fixedly connected with a grate cooler, and the air inlet pipe is communicated with the grate cooler, the discharge end of the stirring dryer is fixedly connected with a spiral feeder, and the feeding port of the spiral feeder is communicated with the stirring dryer, and the discharge port of the spiral feeder is communicated with the feeding port of the decomposition furnace. The air advancing distance in the wind collecting hood can be improved, the air staying time in the wind collecting hood is prolonged, the heat absorbed by the air is increased, and the air temperature is increased.

[0007] According to the cement kiln collaborative disposal sludge drying system, the lower end of the wind collecting hood is fixedly connected with a plurality of support frames at equal intervals, and the lower end of the support frame extends to the ground. The support frame supports the wind collecting hood and the rotary kiln.

[0008] According to the cement kiln collaborative disposal sludge drying system, the side wall of the cavity is fixedly connected with an electric heating wire, and the electric heating wire is in the same spiral shape as the pitch of the spiral baffle. The electric heating wire heats the air when the preliminary work of the cement kiln maintenance is completed, and can assist in heating the air when the waste heat temperature on the surface of the rotary kiln is low, so as to ensure the drying efficiency of the stirring dryer on the sludge and other wastes.

[0009] According to the cement kiln collaborative disposal sludge drying system, a temperature sensor is installed in the air outlet of the wind collecting hood. The temperature sensor is used to detect the temperature of the air discharged from the wind collecting hood after heating, so as to control the work of the electric heating wire.

[0010] According to the cement kiln collaborative disposal sludge drying system, the wind collecting hood is provided with thermal insulation rock wool, and the cavity is located in the middle part of the thermal insulation rock wool, and the air inlet and the air outlet penetrate through the thermal insulation rock wool respectively. The thermal insulation rock wool is used for heat insulation of the wind collecting hood, so as to reduce the heat loss.

[0011] According to the cement kiln collaborative disposal sludge drying system, the upper end of the air collecting hood is fixedly connected with a temperature controller, and the temperature controller is electrically connected with the electric heating wire.

[0012] Compared with the prior art, the beneficial effects of the utility model are that the air advancing distance in the air collecting hood is increased through the spiral baffle, the air staying time in the air collecting hood is prolonged, the heat absorbed by the air is increased, the air temperature is increased, the air is assisted by the electric heating wire when the rotary kiln surface temperature is low, and the drying efficiency of the stirring dryer on sludge and other wastes is ensured.

[0013] The additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be further described below in combination with the drawings and embodiments;

[0015] Figure 1 It is a perspective view of the utility model cement kiln collaborative disposal sludge drying system;

[0016] Figure 2 It is a perspective view of the air collecting hood of the utility model cement kiln collaborative disposal sludge drying system;

[0017] Figure 3 It is a sectional view of the air collecting hood of the utility model cement kiln collaborative disposal sludge drying system;

[0018] Figure 4 It is Figure 3 It is an enlarged view of A in the middle.

[0019] In the drawing: 1, decomposition furnace; 2, air collecting hood; 3, support frame; 4, temperature controller; 5, rotary kiln; 6, induced draft fan; 7, stirring dryer; 8, grate cooler; 9, air inlet pipe; 10, air blower; 11, connecting pipe; 12, screw feeder; 13, air inlet; 14, air outlet; 15, spiral baffle; 16, chamber; 17, electric heating wire; 18, thermal insulation rock wool. DETAILED DESCRIPTION

[0020] The technical scheme in the utility model embodiments will be clearly and completely described below in combination with the drawings in the utility model embodiments, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] Please refer to Figures 1-4 The utility model provides a technical scheme: a cement kiln collaborative disposal sludge drying system, including decomposing furnace 1 and rotary kiln 5, rotary kiln 5 installs on decomposing furnace 1, and the outside end of rotary kiln 5 is fixedly connected with the wind collecting hood 2, and rotary kiln 5 penetrates the middle part of wind collecting hood 2, and the lower end of wind collecting hood 2 is equidistantly fixedly connected with a plurality of support frames 3, and the lower end of support frame 3 extends to the ground, and support frame 3 supports wind collecting hood 2 and rotary kiln 5. The heat preservation rock wool 18 is arranged in the wind collecting hood 2, and the chamber 16 is located in the middle part of the heat preservation rock wool 18, and the air inlet 13 and the air outlet 14 penetrate the heat preservation rock wool 18 respectively, and the heat preservation rock wool 18 is used for heat insulation of the wind collecting hood 2, and reduces heat loss. The chamber 16 is arranged in the wind collecting hood 2, and the rotary kiln 5 is located in the middle part of the chamber 16, and the surface of the wind collecting hood 2 is fixedly connected with the air inlet 13 and the air outlet 14 respectively, and the air inlet 13 and the air outlet 14 penetrate the wind collecting hood 2 respectively, and the air inlet 13 and the air outlet 14 are communicated with the chamber 16 respectively, and the air inlet 13 and the air outlet 14 are located at the two ends of the chamber 16 respectively, and the inner wall of the chamber 16 is fixedly connected with the spiral baffle 15, and the rotary kiln 5 passes through the middle part of the spiral baffle 15 and is threadedly connected with the spiral baffle 15, and the sidewall of the chamber 16 is fixedly connected with the electric heating wire 17, and the electric heating wire 17 is in the same helical shape as the pitch of the spiral baffle 15, and the electric heating wire 17 heats the air when the preliminary work of the cement kiln maintenance is completed, and can assist heating the air when the waste heat temperature on the surface of the rotary kiln 5 is low, to ensure the drying efficiency of the sludge and other waste of the stirring dryer 7. The temperature sensor is installed in the air outlet 14 of the wind collecting hood 2, and the temperature sensor is used for detecting the temperature of the air discharged from the wind collecting hood 2 after heating, to control the work of the electric heating wire 17. The upper end of the wind collecting hood 2 is fixedly connected with the temperature controller 4, and the temperature controller 4 is electrically connected with the electric heating wire 17, and the temperature controller 4 is used for adjusting the temperature generated by the electric heating wire 17. The air outlet 14 is fixedly connected with the induced draft fan 6, and the air outlet 14 is communicated with the input end of the induced draft fan 6, and the output end of the induced draft fan 6 is fixedly connected with the stirring dryer 7, and the output end of the induced draft fan 6 is communicated with the hot air inlet of the stirring dryer 7, and the hot air outlet of the stirring dryer 7 is fixedly connected with the connecting pipe 11, and the end of the connecting pipe 11 away from the stirring dryer 7 is fixedly connected with the air feeder 10, and the connecting pipe 11 is communicated with the input end of the air feeder 10, and the output end of the air feeder 10 is fixedly connected with the air inlet pipe 9, and the end of the air inlet pipe 9 away from the air feeder 10 is fixedly connected with the grate cooler 8, and the air inlet pipe 9 is communicated with the grate cooler 8, and the discharge end of the stirring dryer 7 is fixedly connected with the screw feeder 12, and the feeding port of the screw feeder 12 is communicated with the stirring dryer 7, and the discharge port of the screw feeder 12 is communicated with the feeding port of the decomposing furnace 1.

[0022] Working principle: when using, the air is sucked into the air collecting hood 2 by the air inlet 13, the air travels in the chamber 16 along the spiral baffle 15, the air increases its heat by absorbing the surface temperature of the rotary kiln 5 when traveling in the chamber 16, the heated air is sent into the stirring dryer 7 by the air outlet 14 and the air inlet pipe 9, the waste is dried, when the air temperature discharged from the air collecting hood 2 is low, the electric heating wire 17 generates heat to increase the temperature in the chamber 16, the dried waste is sent into the decomposing furnace 1 by the spiral feeder 12, the waste gas in the stirring dryer 7 is discharged through the connecting pipe 11, the hot air is made to enter the grate cooler 8 through the air inlet pipe 9 by the air blower 10, and the high temperature clinker is used to remove the odor. The above embodiment of the utility model is described in detail in combination with the drawings, but the utility model is not limited to the above embodiment, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A cement kiln co-processing of sludge drying system comprising a decomposition furnace (1) and a rotary kiln (5), characterized in that, The rotary kiln (5) is installed on the decomposing furnace (1), the outer side end of the rotary kiln (5) is fixedly connected with the air collecting hood (2), and the rotary kiln (5) penetrates the middle part of the air collecting hood (2), a cavity (16) is arranged in the air collecting hood (2), and the rotary kiln (5) is located in the middle part of the cavity (16), the surface of the air collecting hood (2) is fixedly connected with an air inlet (13) and an air outlet (14) respectively, the air inlet (13) and the air outlet (14) penetrate the air collecting hood (2) respectively, the air inlet (13) and the air outlet (14) are communicated with the cavity (16) respectively, the air inlet (13) and the air outlet (14) are located at two ends of the cavity (16) respectively, the inner wall of the cavity (16) is fixedly connected with a spiral baffle (15), the rotary kiln (5) penetrates the middle part of the spiral baffle (15) and is threadedly connected with the spiral baffle (15), the air outlet (14) is fixedly connected with an air draught fan (6), the air outlet (14) is communicated with the input end of the air draught fan (6), the output end of the air draught fan (6) is fixedly connected with a stirring dryer (7), the output end of the air draught fan (6) is communicated with the hot air inlet of the stirring dryer (7), the hot air outlet of the stirring dryer (7) is fixedly connected with a connecting pipe (11), one end, away from the stirring dryer (7), of the connecting pipe (11) is fixedly connected with a blower (10), the connecting pipe (11) is communicated with the input end of the blower (10), the output end of the blower (10) is fixedly connected with an air inlet pipe (9), one end, away from the blower (10), of the air inlet pipe (9) is fixedly connected with a grate cooler (8), the air inlet pipe (9) is communicated with the grate cooler (8), the discharge end of the stirring dryer (7) is fixedly connected with a spiral feeder (12), the feeding inlet of the spiral feeder (12) is communicated with the stirring dryer (7), and the discharge outlet of the spiral feeder (12) is communicated with the feeding inlet of the decomposing furnace (1).

2. A cement kiln co-processing of sewage sludge drying system as claimed in claim 1, characterized in that: The lower ends of the air collecting hoods (2) are fixedly connected with a plurality of support frames (3) at equal intervals, and the lower ends of the support frames (3) extend to the ground.

3. A cement kiln co-processing of sewage sludge drying system as claimed in claim 1, characterized in that: The side wall of the cavity (16) is fixedly connected with an electric heating wire (17), and the electric heating wire (17) is in a spiral shape with the same pitch as the spiral baffle (15).

4. A cement kiln co-processing of sewage sludge drying system as claimed in claim 1, characterized in that: A temperature sensor is arranged in the air outlet (14) of the air collecting hood (2).

5. A cement kiln co-processing of sewage sludge drying system as claimed in claim 1, wherein: The air collecting hood (2) is provided with heat preservation rock wool (18), and the cavity (16) is located in the middle part of the heat preservation rock wool (18), and the air inlet (13) and the air outlet (14) penetrate the heat preservation rock wool (18) respectively.

6. A cement kiln co-processing of sewage sludge drying system as claimed in claim 3, wherein: The upper end of the air collecting hood (2) is fixedly connected with a temperature controller (4), and the temperature controller (4) is electrically connected with the electric heating wire (17).

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