Energy-saving and consumption-reducing sludge treatment system

Abstract

The utility model relates to the technical field of sludge treatment, and discloses an energy-saving and consumption-reducing sludge treatment system which comprises a combustion chamber, a rotary kiln, a secondary combustion chamber and a spray drying tower, and a steam boiler is arranged between the upper end of the secondary combustion chamber and the upper end of the spray drying tower; an air inlet pipeline is fixed to the front end of the combustion chamber. The end, away from the combustion chamber, of the air inlet pipeline is connected with an air blower. The air inlet pipeline is inserted into the heating pipeline in a sleeved mode, a sealing plate is arranged between each of the two ends of the heating pipeline and the outer wall of the air inlet pipeline, and the sealing plates, the heating pipeline and the air inlet pipeline form a steam cavity; the steam boiler provides steam for the steam cavity. The steam boiler is arranged between the secondary combustion chamber and the spray drying tower, and the steam boiler can absorb redundant heat and convert the redundant heat into steam; air entering the combustion chamber is heated through steam, the sufficient combustion rate of coal can be effectively increased, and coal loss is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to an energy-saving and consumption-reducing sludge treatment system. Background Art

[0002] The existing sludge treatment system includes a combustion chamber, a rotary kiln, a secondary combustion chamber, a main air duct, a spray drying tower, a bag filter, an induced draft fan, a spray system and a chimney. The main air duct connects the secondary combustion chamber and the spray drying tower. The main air duct cools down the flue gas passing through the main air duct by blowing in natural air from the outside. The existing combustion chamber uses a blower to blow normal temperature air into the combustion chamber and then burns it with coal. Due to the low air temperature, it is easy to cause incomplete combustion of coal, resulting in a large loss of coal. Utility Model Content

[0003] The purpose of the utility model is to provide an energy-saving and consumption-reducing sludge treatment system. By arranging a steam boiler between the secondary combustion chamber and the spray drying tower, the steam boiler can absorb excess heat and convert it into steam; by heating the air entering the combustion chamber with steam, the full combustion rate of coal can be effectively improved, and the loss of coal can be greatly reduced.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] An energy-saving and consumption-reducing sludge treatment system comprises a combustion chamber, a rotary kiln, a secondary combustion chamber, and a spray drying tower, wherein a steam boiler is arranged between the upper end of the secondary combustion chamber and the upper end of the spray drying tower; an air inlet duct is fixed to the front end of the combustion chamber, and a blower is connected to the end of the air inlet duct away from the combustion chamber; the air inlet duct is inserted into a heating duct, and a sealing plate is respectively arranged between the two ends of the heating duct and the outer wall of the air inlet duct, and the sealing plate, the heating duct and the air inlet duct form a steam cavity; the steam boiler provides steam to the steam cavity.

[0006] Through the above technical scheme, the heat generated by burning coal in the combustion chamber enters the rotary kiln, the secondary combustion chamber, the steam boiler and the spray drying tower in sequence. Since the temperature of the flue gas flowing out of the secondary combustion chamber is relatively high, a part of the heat can be absorbed by the steam boiler, so that it can enter the spray drying tower at the required temperature. The heat absorbed by the steam boiler makes the water boil and become steam. The steam enters the steam chamber to heat the air inlet duct. The blower blows the outside normal temperature air into the air inlet duct. The normal temperature air absorbs the heat on the air inlet duct and becomes high-temperature air, and then enters the combustion chamber to react with the coal. Since the temperature of the incoming air increases, the coal can be burned more fully, thereby reducing the coal consumption.

[0007] The air heated by the air inlet duct can be raised from room temperature to about 140 degrees Celsius. Previously, room temperature air directly entered the combustion chamber and burned with coal, and the daily coal consumption was about 37 tons. Now, high-temperature air enters the combustion chamber and burns with coal, and the daily coal consumption is about 35.5-36 tons, which can greatly reduce coal consumption and make full use of the waste heat of the boiler.

[0008] The utility model is further configured as follows: the steam boiler comprises a boiler body, a flue connecting the secondary combustion chamber and the spray drying tower is provided below the boiler body, a water-cooled wall is provided on the inner wall of the flue, and the water-cooled wall is connected to the boiler body through a descending pipe and an ascending pipe;

[0009] The steam bin of the boiler body is connected with an air outlet pipe, and the other end of the air outlet pipe extends into the steam chamber.

[0010] Through the above technical scheme, the high-temperature flue gas from the secondary combustion chamber passes through the flue, and the water-cooled wall absorbs part of the heat passing through the flue. Then the generated steam enters the steam bin of the boiler body through the rising pipe, and then the steam in the boiler body enters the steam cavity through the outlet pipe, thereby heating the air inlet channel.

[0011] The utility model is further configured as follows: a reinforcement pipe is provided in the air inlet pipe, both ends of the reinforcement pipe are sealed and respectively connected to a second air inlet pipe and a second air outlet pipe, the other end of the second air inlet pipe extends into the steam chamber, and the other end of the second air outlet pipe passes through the air inlet pipe and the heating pipe in sequence and is connected to a flow valve, and the flow valve is connected to a water outlet pipe.

[0012] Through the above technical solution, the air entering the steam chamber through the air outlet pipe is added to the air inlet pipe and then enters the enhanced pipe through the second air inlet pipe, and then the enhanced pipe is heated, and then the steam flows out from the air outlet pipe;

[0013] The air passing through the air inlet pipe can be heated not only by the heat of the side wall of the air inlet pipe, but also by the heat dissipated by the pipe, thereby further improving the heating efficiency of the air and improving the utilization rate of steam.

[0014] The utility model is further configured as follows: a plurality of fins are fixed on the outer wall of the air inlet duct.

[0015] Through the above technical solution, the fins can increase the heat exchange effect with steam.

[0016] The utility model is further configured as follows: a plurality of linearly evenly distributed first heat-conducting cone sleeves are fixed on the inner wall of the air inlet duct, a plurality of linearly evenly distributed second heat-conducting cone sleeves are fixed on the outer wall of the reinforcement duct, and the first heat-conducting cone sleeves and the second heat-conducting cone sleeves are staggered.

[0017] Through the above technical solution, the first heat-conducting cone sleeve and the second heat-conducting cone sleeve can increase the contact area of ​​the air flowing through the air inlet duct, so as to achieve a better heating effect.

[0018] The utility model is further configured as follows: the heating pipe is cast in the concrete wall of the combustion chamber, and a gap is left between the outer wall of the middle part of the heating pipe and the concrete wall.

[0019] Through the above technical solution, the existence of the gap provides deformation space for the heating pipe to flow out due to thermal expansion and contraction.

[0020] The beneficial effects of the utility model are:

[0021] Compared with the prior art, by arranging a steam boiler between the secondary combustion chamber and the spray drying tower, the steam boiler can absorb the excess heat and convert it into steam, thereby improving the utilization of heat;

[0022] By heating the air entering the combustion chamber with steam, the coal combustion rate can be effectively improved and coal loss can be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 for Figure 1 A partial enlarged view of A;

[0025] Figure 3 for Figure 1 A partial enlarged view of B.

[0026] Reference numerals: 11, combustion chamber; 12, rotary kiln; 13, secondary combustion chamber; 14, spray drying tower; 15, steam boiler;

[0027] 151. Boiler body; 152. Flue; 153. Water-cooled wall; 154. Exhaust pipe;

[0028] 20. air inlet duct; 21. blower; 22. heating duct; 23. sealing plate; 24. reinforcing duct; 25. second air inlet duct; 26. second air outlet duct; 27. flow valve; 28. water outlet duct; 29. ​​fin; 210. first heat-conducting cone sleeve; 211. second heat-conducting cone sleeve;

[0029] 2000. Steam chamber. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] The following references Figures 1 to 3 The utility model is described as follows:

[0032] An energy-saving and consumption-reducing sludge treatment system comprises a combustion chamber 11, a rotary kiln 12, a secondary combustion chamber 13, and a spray drying tower 14, wherein a steam boiler 15 is provided between the upper end of the secondary combustion chamber 13 and the upper end of the spray drying tower 14; an air inlet duct 20 is fixed to the front end of the combustion chamber 11, and a blower 21 is connected to the end of the air inlet duct 20 away from the combustion chamber 11; the air inlet duct 20 is inserted into a heating duct 22, and a sealing plate 23 is respectively provided between the two ends of the heating duct 22 and the outer wall of the air inlet duct 20, and the sealing plate 23, the heating duct 22 and the air inlet duct 20 form a steam chamber 2000; the steam boiler 15 provides steam to the steam chamber 2000.

[0033] The heat generated by burning coal in the combustion chamber enters the rotary kiln, secondary combustion chamber, steam boiler and spray drying tower in turn. Since the temperature of the flue gas flowing out of the secondary combustion chamber is relatively high, part of the heat can be absorbed by the steam boiler, so that it can enter the spray drying tower at the required temperature. The heat absorbed by the steam boiler makes the water boil and become steam. The steam enters the steam chamber to heat the air inlet duct. The blower blows the outside normal temperature air into the air inlet duct. The normal temperature air absorbs the heat on the air inlet duct and becomes high-temperature air. Then it enters the combustion chamber to react with the coal. As the temperature of the incoming air increases, the coal can be burned more fully, thereby reducing the coal consumption.

[0034] The air heated by the air inlet duct can be raised from room temperature to about 140 degrees Celsius. Previously, room temperature air directly entered the combustion chamber and burned with coal, and the daily coal consumption was about 37 tons. Now, high-temperature air enters the combustion chamber and burns with coal, and the daily coal consumption is about 35.5-36 tons, which can greatly reduce coal consumption and make full use of the waste heat of the boiler.

[0035] The steam boiler 15 includes a boiler body 151, a flue 152 is provided below the boiler body 151, and the flue 152 is connected to the secondary combustion chamber 13 and the spray drying tower 14. A water-cooled wall 153 is provided on the inner wall of the flue 152, and the water-cooled wall 153 is connected to the boiler body 151 through a descending pipe and an ascending pipe.

[0036] The steam chamber of the boiler body 151 is connected to an air outlet pipe 154 , and the other end of the air outlet pipe 154 extends into the steam chamber 2000 .

[0037] The high-temperature flue gas from the secondary combustion chamber passes through the flue, and the water-cooled wall absorbs part of the heat passing through the flue. Then the generated steam enters the steam bin of the boiler body through the rising pipe, and then the steam in the boiler body enters the steam cavity through the outlet pipe, thereby heating the air inlet channel.

[0038] A reinforcement pipe 24 is provided in the air inlet pipe 20, and both ends of the reinforcement pipe 24 are sealed and respectively connected to a second air inlet pipe 25 and a second air outlet pipe 26. The other end of the second air inlet pipe 25 extends into the steam chamber 2000, and the other end of the second air outlet pipe 26 passes through the air inlet pipe 20 and the heating pipe 22 in turn, and is connected to a flow valve 27, and the flow valve 27 is connected to a water outlet pipe 28.

[0039] The air entering the steam chamber through the air outlet pipe is added to the air inlet pipe and then enters the enhanced pipe through the second air inlet pipe, and then heats the enhanced pipe, and then the steam flows out from the air outlet pipe;

[0040] The air passing through the air inlet pipe can be heated not only by the heat of the side wall of the air inlet pipe, but also by the heat dissipated by the pipe, thereby further improving the heating efficiency of the air and improving the utilization rate of steam.

[0041] A plurality of fins 29 are fixed on the outer wall of the air inlet duct 20 .

[0042] The fins increase the heat exchange with the steam.

[0043] A plurality of linearly evenly distributed first heat-conducting cone sleeves 210 are fixed on the inner wall of the air inlet duct 20, and a plurality of linearly evenly distributed second heat-conducting cone sleeves 211 are fixed on the outer wall of the reinforcement duct 24. The first heat-conducting cone sleeves 210 and the second heat-conducting cone sleeves 211 are staggered.

[0044] The first heat-conducting cone sleeve 210 and the second heat-conducting cone sleeve 211 can increase the contact area of ​​the air flowing through the air inlet duct, so as to achieve a better heating effect.

[0045] The heating pipe 22 is cast in the concrete wall 111 of the combustion chamber 11 , and a gap is left between the outer wall of the middle part of the heating pipe 22 and the concrete wall 111 .

[0046] The existence of the gap provides space for the heating pipe to expand and contract due to heat.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. An energy-saving and consumption-reducing sludge treatment system, comprising a combustion chamber (11), a rotary kiln (12), a secondary combustion chamber (13) and a spray drying tower (14), characterized in that: A steam boiler (15) is provided between the upper end of the secondary combustion chamber (13) and the upper end of the spray drying tower (14); an air inlet duct (20) is fixed to the front end of the combustion chamber (11), and the end of the air inlet duct (20) away from the combustion chamber (11) is connected to a blower (21); the air inlet duct (20) is inserted into the heating duct (22), and a sealing plate (23) is provided between the two ends of the heating duct (22) and the outer wall of the air inlet duct (20), respectively, and the sealing plate (23), the heating duct (22) and the air inlet duct (20) form a steam chamber (2000); and the steam boiler (15) provides steam to the steam chamber (2000).

2. The energy-saving and consumption-reducing sludge treatment system according to claim 1 is characterized in that: The steam boiler (15) comprises a boiler body (151), a flue (152) communicating with the secondary combustion chamber (13) and the spray drying tower (14) is provided below the boiler body (151), a water-cooled wall (153) is provided on the inner wall of the flue (152), and the water-cooled wall (153) is connected to the boiler body (151) via a descending pipe and an ascending pipe; The steam chamber of the boiler body (151) is connected to an air outlet pipe (154), and the other end of the air outlet pipe (154) extends into the steam chamber (2000).

3. The energy-saving and consumption-reducing sludge treatment system according to claim 2 is characterized in that: The air inlet duct (20) is provided with a reinforcement duct (24), and both ends of the reinforcement duct (24) are sealed and respectively connected to a second air inlet duct (25) and a second air outlet duct (26), the other end of the second air inlet duct (25) extends into the steam chamber (2000), and the other end of the second air outlet duct (26) passes through the air inlet duct (20) and the heating duct (22) in sequence, and is connected to a flow valve (27), and the flow valve (27) is connected to a water outlet duct (28).

4. The energy-saving and consumption-reducing sludge treatment system according to claim 1 is characterized in that: A plurality of fins (29) are fixed on the outer wall of the air inlet duct (20).

5. The energy-saving and consumption-reducing sludge treatment system according to claim 3 is characterized by: A plurality of linearly evenly distributed first heat-conducting cone sleeves (210) are fixed on the inner wall of the air inlet duct (20), and a plurality of linearly evenly distributed second heat-conducting cone sleeves (211) are fixed on the outer wall of the reinforcement duct (24), wherein the first heat-conducting cone sleeves (210) and the second heat-conducting cone sleeves (211) are staggered.

6. The energy-saving and consumption-reducing sludge treatment system according to claim 1 is characterized by: The heating pipe (22) is cast in the concrete wall (111) of the combustion chamber (11), and a gap is left between the outer wall of the middle part of the heating pipe (22) and the concrete wall (111).

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