Sludge drying expansion device

Abstract

The utility model discloses a sludge drying capacity expansion device, and relates to the field of sludge drying, the sludge drying capacity expansion device comprises a boiler drum I, a boiler drum II is arranged on one side of the boiler drum I, a drying machine I is arranged at one end of the boiler drum I, and a drying machine II is arranged on one side of the drying machine I; one side of the first drying machine and one side of the second drying machine are each provided with a condensate water tank, and switching mechanisms are arranged between the first boiler drum and the first drying machine and between the second boiler drum and the second drying machine. The first boiler drum or the second boiler drum generates steam, the steam generated by the first boiler drum or the second boiler drum enters the switching mechanism, then the steam is conveyed through the switching mechanism, and the path of the steam can be changed through the switching mechanism during conveying. Therefore, steam generated in the first boiler drum and the second boiler drum can enter the first drying machine or the second drying machine according to needs, and the operation mode of sludge drying is more flexible.

Description

Technical Field

[0001] The present application relates to the field of sludge drying, and in particular to a sludge drying and capacity expansion device. Background Art

[0002] Sludge is the solid sediment produced by the water and sewage treatment process. Under non-specific circumstances, sludge generally refers to municipal drainage sludge. The important equipment in sludge treatment is sludge dewatering machine and sludge dryer.

[0003] When treating sludge, the operating principle of the sludge dryer is that the boiler drum incinerates garbage to heat the water in the drum to generate steam, and then the saturated steam after temperature and pressure reduction from the first section of the steam turbine is extracted and enters the disk of the super disk from the hollow shaft of the sludge dryer, and indirectly exchanges heat with the wet sludge outside the disk of the sludge dryer, so that the water in the wet sludge evaporates and dries. The existing drying process generally has three sludge drying lines. When two boiler drums and two dryers are in operation, all three sludge drying lines can operate.

[0004] However, with the construction and commissioning of waste-to-energy plants in various regions, the amount of waste put into boiler drum incineration has become increasingly insufficient. Affected by the amount of waste, the frequency and cycle of operation of one boiler drum and one dryer have increased. Moreover, when one boiler and one machine are in operation, the process parameters can only ensure the operation of two sludge drying lines. Utility Model Content

[0005] The purpose of the present application is to solve the problem raised in the above background technology that with the successive construction and commissioning of garbage power plants in various regions, the amount of garbage put into boiler drum incineration is gradually insufficient. Affected by the amount of garbage, the frequency and cycle of operation of one boiler drum and one dryer have increased, and when one furnace and one machine are in operation, the process parameters can only ensure the operation of two sludge drying lines. The present application provides a sludge drying expansion device.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0007] The sludge drying and expansion device comprises a boiler drum 1, a boiler drum 2 is arranged on one side of the boiler drum 1, an air preheater is arranged on one side of the boiler drum 1 and the boiler drum 2, the air preheater is connected with the corresponding boiler drum 1 and the boiler drum 2 by a pipeline, a dryer 1 is arranged at one end of the boiler drum 1, a dryer 2 is arranged on one side of the dryer 1, a condensate tank is installed on one side of the dryer 1 and the dryer 2, and a switching mechanism is arranged between the boiler drum 1, the boiler drum 2 and the dryer 1 and the dryer 2.

[0008] By adopting the above technical scheme, boiler drum one or boiler drum two generates steam, and the steam generated by boiler drum one or boiler drum two enters the switching mechanism, and then the switching mechanism transports the steam. During transportation, the switching mechanism can be used to change the path of the steam, so that the steam generated by boiler drum one enters dryer one or dryer two, so that the steam generated in boiler drum one and boiler drum two can enter dryer one or dryer two as needed, making the operation mode of sludge drying more flexible.

[0009] Furthermore, the switching mechanism includes a connecting main pipe arranged between boiler drum 1 and boiler drum 2, connecting pipe 1 is fixed on boiler drum 1, connecting pipe 2 is fixed on boiler drum 2, connecting pipe 1 and connecting pipe 2 are both fixedly connected to the connecting main pipe and are interconnected, valve 1 is fixed on connecting pipe 1, and valve 2 is fixed on connecting pipe 2.

[0010] By adopting the above technical solution, by using the switch valve 1 and valve 2, connecting pipe 1 or connecting pipe 2 is connected to the connecting main pipe, so that the steam generated by boiler drum 1 or boiler drum 2 can be conveniently switched back and forth and sent to the connecting main pipe.

[0011] Furthermore, a connecting pipe three is fixed on the dryer one, a connecting pipe four is fixed on the dryer two, the connecting pipe three and the connecting pipe four are both fixedly connected to the connecting main pipe and are interconnected, the connecting pipe three is fixed with a valve three, and the connecting pipe four is fixed with a valve four.

[0012] By adopting the above technical solution, by using the switch of valve three and valve four, the steam from the connecting main pipe can enter connecting pipe three or connecting pipe four, so that the steam can enter dryer one or dryer two, which is convenient for switching back and forth.

[0013] Furthermore, a temperature and pressure reducing device is fixed on the connecting main pipe, and the temperature and pressure reducing device is connected to the connecting main pipe.

[0014] By adopting the above technical solution, the steam in the connecting main pipe can enter the temperature and pressure reducing device, so that the steam in the connecting main pipe can meet the use standards when entering the dryer 1 or the dryer 2.

[0015] Furthermore, a cooling water pump is fixed on the condensing water tank, and the cooling water pump is connected to the cooling and pressure reducing device via a pipeline.

[0016] By adopting the above technical solution, steam is used to dry the sludge in the dryer one or the dryer two, the water in the sludge evaporates and the condensed water enters the condensation water tank, and then the cooling water is pumped to the cooling and pressure reducing device, thereby reducing the waste of cooling water in the cooling and pressure reducing device.

[0017] Furthermore, a steam trap is provided at one end of the temperature and pressure reducing device, and the steam trap is fixedly connected to the connecting main pipe and communicated with each other.

[0018] By adopting the above technical solution, the water flow and steam in the connecting main pipe are separated by a steam trap, thereby reducing the water flow entering the temperature and pressure reducing device and affecting the temperature and pressure reduction of the steam.

[0019] Furthermore, a drain pump is fixed on the drain valve, and the drain pump is connected to the temperature and pressure reducing device through a pipeline.

[0020] By adopting the above technical solution, the water flow intercepted by the steam trap is sent to the temperature reducing and pressure reducing device by using the steam trap pump, so that the water intercepted by the steam trap can be used as temperature reducing water.

[0021] Furthermore, the connecting pipe 1, the connecting pipe 2, the connecting pipe 3, the connecting pipe 4 are all wrapped with a thermal insulation layer.

[0022] By adopting the above technical solution, the connecting pipes 1, 2, 3, 4 and the connecting main pipe are wrapped with a thermal insulation layer, thereby reducing the heat loss of the pipes and the possibility of being scalded by the pipes.

[0023] In summary, the present application includes at least one of the following beneficial effects:

[0024] 1. In the present application, when the steam is generated in the boiler drum 1 or the boiler drum 2, the steam generated in the boiler drum 1 enters the connecting pipe 1, the valve 1 is opened, the steam enters the connecting pipe from the connecting pipe 1, and then the steam is cooled and decompressed by the temperature reducing and pressure reducing device. When the valve 3 is opened, the steam enters the dryer 1 from the connecting pipe 3, and when the valve 4 is opened, the steam enters the dryer 2 from the connecting pipe 4. When the boiler drum 2 generates steam, the valve 1 is closed, the valve 2 is opened, and then the steam enters the connecting pipe from the connecting pipe 2. After passing through the temperature reducing and pressure reducing device, the valve 3 and the valve 4 determine whether the steam enters the dryer 1 or the dryer 2. The steam enters the dryer 1. Or the sludge is dried in the dryer 2, and the steam generated by the sludge drying is condensed and enters the condenser box, and then the desuperheating water pump is used to send the condensed water in the condenser box to the desuperheating and pressure reducing device to act as desuperheating water. By using the cooperation of valve 1 and valve 2, the steam generated by boiler drum 1 or boiler drum 2 can be selectively entered into the connecting main pipe. After passing through the desuperheating and pressure reducing device, valve 3 and valve 4 determine whether the steam enters dryer 1 or dryer 2, so that the steam in boiler drum 1 and boiler drum 2 can be conveniently switched back and forth between dryer 1 and dryer 2 according to actual needs, and can be switched back and forth on multiple operation routes, with flexible operation mode.

[0025] 2. In the present application, after the steam enters the connecting pipe, the steam is allowed to pass through the steam trap on the connecting pipe and then enter the temperature reducing and pressure reducing device. The steam trap is used to separate the water flow and steam in the connecting pipe, thereby achieving the purpose of reducing the water flow entering the temperature reducing and pressure reducing device and affecting the temperature reducing and pressure reducing of the steam. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a first three-dimensional structural schematic diagram of the sludge drying and expansion device in this application;

[0027] Figure 2 It is the first stereoscopic structural schematic diagram of the sludge drying and capacity expansion device in this application.

[0028] Description of reference numerals:

[0029] 1. Boiler drum 1; 2. Boiler drum 2; 3. Air preheater; 4. Dryer 1; 5. Dryer 2; 6. Condensate tank; 7. Switching mechanism; 71. Connecting pipe 1; 72. Connecting pipe 2; 73. Connecting main pipe; 74. Valve 1; 75. Valve 2; 76. Connecting pipe 3; 77. Connecting pipe 4; 78. Valve 3; 79. Valve 4; 8. Temperature and pressure reducing device; 9. Temperature and pressure reducing pump; 10. Drain valve; 11. Drain pump. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1 —2 Provide further details of this application.

[0031] The embodiments of the present application disclose a sludge drying and capacity expansion device.

[0032] Reference Figure 1 and Figure 2 The sludge drying and expansion device comprises a boiler drum 1, a boiler drum 2 2 is arranged on one side of the boiler drum 1, an air preheater 3 is arranged on one side of the boiler drum 1 and the boiler drum 2 2, the air preheater 3 is connected with the corresponding boiler drum 1 and the boiler drum 2 by a pipeline, a dryer 4 is arranged at one end of the boiler drum 1, a dryer 2 5 is arranged on one side of the dryer 4, a condensate tank 6 is installed on one side of the dryer 4 and the dryer 2 5, and a switching mechanism 7 is arranged between the boiler drum 1, the boiler drum 2 and the dryer 4 and the dryer 2 5.

[0033] Boiler drum 1 or boiler drum 2 generates steam, and the steam generated by boiler drum 1 or boiler drum 2 enters the switching mechanism 7, and then the switching mechanism 7 transports the steam. During transportation, the switching mechanism 7 can be used to change the path of the steam, so that the steam generated by boiler drum 1 enters the dryer 4 or the dryer 5, and the steam generated by boiler drum 22 enters the dryer 4 or the dryer 2. By using the switching mechanism 7, the steam generated in boiler drum 1 and boiler drum 22 can be switched back and forth between dryer 1 4 and dryer 2 5, so that the steam generated in boiler drum 1 and boiler drum 22 can enter dryer 1 4 or dryer 2 5 as needed, making the operation mode of sludge drying more flexible.

[0034] Reference Figure 1 and Figure 2 The switching mechanism 7 includes a connecting main pipe 73 arranged between the boiler drum 1 and the boiler drum 2. A connecting pipe 1 71 is fixed on the boiler drum 1, and a connecting pipe 2 72 is fixed on the boiler drum 2. The connecting pipe 1 71 and the connecting pipe 2 72 are both fixedly connected to the connecting main pipe 73 and are interconnected. A valve 1 74 is fixed on the connecting pipe 1 71, and a valve 2 75 is fixed on the connecting pipe 2 72.

[0035] In addition, a connecting pipe three 76 is fixed on the dryer one 4, and a connecting pipe four 77 is fixed on the dryer two 5. The connecting pipe three 76 and the connecting pipe four 77 are both fixedly connected to the connecting main pipe 73 and are interconnected. A valve three 78 is fixed on the connecting pipe three 76, and a valve four 79 is fixed on the connecting pipe four 77.

[0036] Moreover, a temperature reducing and pressure reducing device 8 is fixed to the connecting main pipe 73 , and the temperature reducing and pressure reducing device 8 is in communication with the connecting main pipe 73 .

[0037] Furthermore, a desuperheating water pump 9 is fixed on the condensing water tank 6 , and the desuperheating water pump 9 is connected to the desuperheating and pressure reducing device 8 via a pipeline.

[0038] When the boiler drum 1 or the boiler drum 2 generates steam, the steam generated by the boiler drum 1 enters the connecting pipe 1 71, and the valve 1 74 is opened, and the steam enters the connecting main pipe 73 from the connecting pipe 1 71, and then passes through the temperature reducing and pressure reducing device 8 to reduce the temperature and pressure of the steam. When the valve 3 78 is opened, the steam enters the dryer 1 4 from the connecting pipe 3 76, and when the valve 4 79 is opened, the steam enters the dryer 2 5 from the connecting pipe 4 77. When the boiler drum 2 generates steam, the valve 1 74 is closed, the valve 2 75 is opened, and then the steam enters the connecting main pipe 73 from the connecting pipe 2 72, and then passes through the temperature reducing and pressure reducing device 8. The steam entering the dryer 5 is determined by the valve 3 78 and the valve 4 79. The steam enters the dryer 1 4 or the dryer 2 5 to dry the sludge, and the steam generated by the sludge drying is condensed and enters the condenser box, and then the cooling water pump 9 is used to send the condensed water in the condenser box to the cooling and pressure reducing device 8 to serve as cooling water. By using the cooperation of valve 1 74 and valve 2 75, the steam generated by the boiler drum 1 or the boiler drum 2 2 can selectively enter the connecting pipe 73. After passing through the cooling and pressure reducing device 8, the valve 3 78 and valve 4 79 determine whether the steam enters the dryer 1 4 or the dryer 2 5, so that the steam can be conveniently switched back and forth between the dryer 1 4 and the dryer 2 5 according to actual needs, and the operation mode is flexible.

[0039] Reference Figure 1 and Figure 2 A steam trap 10 is provided at one end of the temperature reducing and pressure reducing device 8, and the steam trap 10 is fixedly connected to the connecting pipe 73 and communicated with each other. After the steam enters the connecting pipe 73, the steam passes through the steam trap 10 on the connecting pipe 73 and then enters the temperature reducing and pressure reducing device 8. The steam trap 10 is used to separate the water flow and steam in the connecting pipe 73. By using the steam trap 10 to separate the water and steam in the connecting pipe 73, it is possible to reduce the water flow entering the temperature reducing and pressure reducing device 8, which affects the temperature reducing and pressure reducing of the steam.

[0040] Reference Figure 1 and Figure 2 A drain pump 11 is fixed on the steam trap 10, and the drain pump 11 is connected to the temperature reducing and pressure reducing device 8 by a pipeline. After the steam trap 10 intercepts and cools the water flow in the steam in the connecting pipe 73, the drain pump 11 is used to send the water flow to the temperature reducing and pressure reducing device 8. By using the drain pump 11 to send the water in the steam trap 10 to the temperature reducing and pressure reducing device 8, the water intercepted by the steam trap 10 can be used as temperature reducing water.

[0041] Reference Figure 1 and Figure 2The connecting pipe 1 71, the connecting pipe 2 72, the connecting pipe 3 76, and the connecting pipe 4 77 are all wrapped with a heat-insulating layer. The heat-insulating layer is a heat-insulating sponge layer. By wrapping the heat-insulating layer on the connecting pipe 1 71, the connecting pipe 2 72, the connecting pipe 3 76, the connecting pipe 4 77, and the connecting pipe 4 77, the heat loss of the pipeline can be reduced, and the possibility of being scalded by the pipeline can be reduced.

[0042] Working principle: When the boiler drum 1 or the boiler drum 2 generates steam, the steam generated by the boiler drum 1 enters the connecting pipe 1 71, and the valve 1 74 is opened, and the steam enters the connecting pipe 73 from the connecting pipe 1. After the steam enters the connecting pipe 73, the steam passes through the steam trap 10 on the connecting pipe 73. The steam trap 10 separates the water and steam in the connecting pipe 73, and then enters the temperature and pressure reducing device 8. Then, the steam is cooled and reduced in pressure by the temperature and pressure reducing device 8. When the valve 3 78 is opened, the steam enters the dryer 4 from the connecting pipe 3 76. When the valve 4 7 is opened, the steam enters the dryer 4 from the connecting pipe 3 76. 9. Steam enters the dryer 2 5 from the connecting pipe 4 77. When the boiler drum 2 2 generates steam, close the valve 1 74 and open the valve 2 75. Then the steam enters the connecting pipe 73 from the connecting pipe 2 72. After passing through the temperature reducing and pressure reducing device 8, the valve 3 78 and the valve 4 79 determine whether the steam enters the dryer 1 4 or the dryer 2 5. The steam enters the dryer 1 4 or the dryer 2 5 to dry the sludge. The steam generated by the sludge drying condenses and enters the condensation box. Then the cooling water pump 9 is used to send the condensed water in the condensation box to the temperature reducing and pressure reducing device 8 to serve as cooling water.

Claims

1. A sludge drying and expansion device, comprising a boiler drum 1 (1), characterized in that: A boiler drum 2 (2) is provided on one side of the boiler drum 1 (1), and an air preheater (3) is provided on one side of each of the boiler drum 1 (1) and the boiler drum 2 (2). The air preheater (3) is connected to the corresponding boiler drum 1 (1) and the boiler drum 2 (2) by a pipeline. A dryer 1 (4) is provided on one end of the boiler drum 1 (1), and a dryer 2 (5) is provided on one side of the dryer 1 (4). A condensate tank (6) is installed on one side of the dryer 1 (4) and the dryer 2 (5). A switching mechanism (7) is provided between the boiler drum 1 (1), the boiler drum 2 (2) and the dryer 1 (4), and the dryer 2 (5).

2. The sludge drying and capacity expansion device according to claim 1, characterized in that: The switching mechanism (7) comprises a connecting main pipe (73) arranged between the first boiler drum (1) and the second boiler drum (2); the first boiler drum (1) is fixed with a connecting pipe (71), the second boiler drum (2) is fixed with a connecting pipe (72); the first connecting pipe (71) and the second connecting pipe (72) are both fixedly connected to the connecting main pipe (73) and are in communication with each other; the first connecting pipe (71) is fixed with a valve (74), and the second connecting pipe (72) is fixed with a valve (75).

3. The sludge drying and capacity expansion device according to claim 2, characterized in that: A connecting pipe three (76) is fixed on the drying machine one (4), and a connecting pipe four (77) is fixed on the drying machine two (5). The connecting pipe three (76) and the connecting pipe four (77) are both fixedly connected to the connecting main pipe (73) and are interconnected. A valve three (78) is fixed on the connecting pipe three (76), and a valve four (79) is fixed on the connecting pipe four (77).

4. The sludge drying and capacity expansion device according to claim 3 is characterized in that: A temperature and pressure reducing device (8) is fixed on the connecting main pipe (73), and the temperature and pressure reducing device (8) is in communication with the connecting main pipe (73).

5. The sludge drying and capacity expansion device according to claim 4, characterized in that: A cooling water pump (9) is fixed on the condensing water tank (6), and the cooling water pump (9) is connected to the cooling and pressure reducing device (8) via a pipeline.

6. The sludge drying and capacity expansion device according to claim 4, characterized in that: A drain valve (10) is provided at one end of the temperature and pressure reducing device (8), and the drain valve (10) is fixedly connected to the connecting main pipe (73) and communicates with each other.

7. The sludge drying and capacity expansion device according to claim 6, characterized in that: A drain pump (11) is fixed on the drain valve (10), and the drain pump (11) is connected to the temperature and pressure reducing device (8) via a pipeline.

8. The sludge drying and capacity expansion device according to claim 3, characterized in that: The connecting pipe 1 (71), the connecting pipe 2 (72), the connecting pipe 3 (76) and the connecting pipe 4 (77) are all wrapped with a thermal insulation layer.

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