Sludge drying condensation water recycling device

Abstract

The utility model discloses a sludge drying condensation water recycling device in the technical field of sludge treatment. The sludge drying condensation water recycling device comprises an AQC boiler and a cement kiln. A steam pipeline outlet of the AQC boiler is connected with a waste heat power generation steam collection cylinder, a steam outlet of the waste heat power generation steam collection cylinder is connected with a sludge drying system, the sludge drying system is connected with a condensed water treatment system through a water supply pipeline, and condensed water treated by the condensed water treatment system flows back to the AQC boiler. The sludge drying system comprises a temperature and pressure reducer, a sludge dryer and a cement kiln. The sludge dryer is connected with a condensed water recovery tank through a water supply pipeline. The condensed water treatment system comprises a desalting water tank, a desalting water pump, a deaerator and a high-pressure water feeding pump which are sequentially connected through a water feeding pipeline. According to the utility model, the energy consumption and the secondary pollution can be reduced, and the utilization efficiency of water resources is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sludge treatment technical field, especially a kind of sludge drying condensate water recycling device. BACKGROUND

[0002] With the acceleration of urbanization and the development of industry, sludge production increases year by year, and sludge treatment becomes an important issue in the field of environmental protection. Traditional sludge treatment methods, such as landfill and composting, have problems such as land resource occupation and secondary pollution. As a new sludge treatment technology, cement kiln co-processing sludge uses the high temperature environment in the cement production process to incinerate sludge, which has many advantages.

[0003] However, the sludge needs to be heat-dried pretreated before entering the kiln to reduce the moisture content of the sludge and improve the incineration efficiency. The traditional heat-drying method requires additional heat source, which not only has high energy consumption but also may cause secondary pollution. In addition, the condensate water generated during the sludge drying process is not effectively recycled, causing waste of water resources. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a sludge drying condensate water recycling device to solve the problems mentioned in the background art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] A sludge drying condensate water recycling device includes an AQC boiler and a cement kiln. The steam pipe outlet of the AQC boiler is connected to a waste heat power generation steam collecting cylinder, the steam outlet of the waste heat power generation steam collecting cylinder is connected to a sludge drying system, the sludge drying system is connected to a condensate water treatment system through a feed water pipe, and the condensate water treated by the condensate water treatment system is returned to the AQC boiler.

[0007] Further, the sludge drying system includes a temperature and pressure reducer, a sludge dryer, and a cement kiln. The waste heat power generation steam collecting cylinder is connected to the sludge dryer through a steam pipe, and a temperature and pressure reducer is arranged between the waste heat power generation steam collecting cylinder and the sludge dryer. The sludge dryer is connected to a condensate water recovery tank through a feed water pipe.

[0008] Further, the condensate water treatment system includes a desalted water tank, a desalted water pump, a deaerator and a high-pressure feed water pump connected in sequence through a feed water pipe. The outlet of the high-pressure feed water pump is connected to the feed water main pipe of the AQC boiler.

[0009] Further, the steam outlet of the waste heat power generation steam collecting cylinder is also connected to a steam turbine generator set.

[0010] The utility model also includes other components that can make the sludge drying condensate water recycling device normal use, these equipment or components all adopt the conventional technical means in the field.

[0011] The working principle of the utility model is: in the process of sludge disposal in cement kiln, sludge needs to be pretreated by heat drying before entering the kiln to reduce its water content. This technology uses steam generated by AQC boiler in the cement production process to transfer heat to the sludge through direct or indirect heat exchange, realizing heat drying of the sludge. This method is environmentally friendly and energy-saving, without additional heat source, and can directly use steam for sludge drying.

[0012] The condensate water generated in the sludge drying process can be recycled. The condensate water is transported to the desalted water tank through the water supply pipeline, and then sent to the deaerator for deoxygenation treatment by the desalted water pump, and finally returned to the AQC boiler by the high-pressure water supply pump. Since the temperature of the recycled condensate water is higher than that of the desalted water in the system, it exchanges heat with the desalted water, increases the water temperature, and then enters the economizer, increases the temperature in the economizer, and thus enhances the heat exchange efficiency and output of the AQC boiler. This process not only improves the energy utilization efficiency, but also reduces energy consumption.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. Reduce energy consumption and reduce secondary pollution: by using waste heat steam in the cement production process to dry the sludge, the use of additional heat source in the traditional heat drying method is avoided, thereby reducing energy consumption and possible secondary pollution.

[0015] 2. Improve water resource utilization efficiency: the condensate water generated in the sludge drying process is effectively recycled and reused, avoiding waste of water resources and improving water resource utilization efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model kind of sludge drying condensate water recycling device.

[0017] In the figure: 1, AQC boiler; 2, waste heat power generation steam collecting cylinder; 3, sludge drying system; 31, temperature and pressure reducer; 32, sludge dryer; 33, condensate water recovery tank; 34, cement kiln; 4, condensate water treatment system; 41, desalted water tank; 42, desalted water pump; 43, deaerator; 44, high-pressure water supply pump; 5, steam turbine generator unit. DETAILED DESCRIPTION

[0018] The utility model will be further explained in detail below in combination with the drawings and specific embodiments.

[0019] Embodiments:

[0020] As Figure 1 shown, a sludge drying condensate water recycling device, including AQC boiler 1 and cement kiln 34. AQC boiler 1 steam pipe outlet is connected with the waste heat power generation steam trap 2, and the steam outlet of waste heat power generation steam trap 2 is connected with sludge drying system 3, and sludge drying system 3 is connected with condensate water treatment system 4 through the water supply pipeline, and the condensate water treated by condensate water treatment system 4 flows back to AQC boiler 1.

[0021] Specifically, sludge drying system 3 includes desuperheater 31, sludge dryer 32, cement kiln 34, waste heat power generation steam trap 2 is connected with sludge dryer 32 through steam pipe, and desuperheater 31 is arranged between waste heat power generation steam trap 2 and sludge dryer 32. Sludge dryer 32 is connected with condensate water recovery tank 33 through the water supply pipeline. Condensate water treatment system 4 includes desalted water tank 41, desalted water pump 42, deaerator 43 and high-pressure feed water pump 44 connected in sequence through the water supply pipeline, and the water outlet end of high-pressure feed water pump 44 is connected with the water supply main pipe of AQC boiler 1.

[0022] In addition, the steam outlet of waste heat power generation steam trap 2 is also connected with steam turbine generator set 5.

[0023] The working principle of the sludge drying condensate water recycling device is that in the process of cement kiln 34 cooperatively disposing sludge, the sludge needs to be pretreated by heat drying before entering the kiln to reduce its water content. This technology utilizes the steam generated by AQC boiler 1 in the cement production process, and transmits heat to the sludge by direct or indirect heat exchange, so as to realize the heat drying of the sludge. This method is environmentally friendly and energy-saving, does not need additional heat source, and can directly utilize steam for sludge drying.

[0024] The condensate water generated in the sludge drying process can be recycled. The condensate water is transported to desalted water tank 41 through the water supply pipeline, and then sent to deaerator 43 by desalted water pump 42 for deoxygenation treatment, and finally returned to AQC boiler 1 by high-pressure feed water pump 44. Since the temperature of the recycled condensate water is higher than that of the desalted water in the system, it exchanges heat with the desalted water, increases the water temperature, and then enters the economizer, increases the temperature in the economizer, and thus enhances the heat exchange efficiency and output of AQC boiler 1. This process not only improves the energy utilization efficiency, but also reduces the energy consumption.

[0025] The above embodiment only describes the preferred embodiments of the utility model, and does not limit the scope of the utility model, and various deformations and improvements of the technical scheme of the utility model made by the ordinary skilled in the art without departing from the design spirit of the utility model should fall within the protection scope of the utility model.

Claims

1. A sludge dewatering condensate water recovery and reuse apparatus comprising an AQC boiler (1) and a cement kiln (34) characterized by: The steam pipeline outlet of the AQC boiler (1) is connected with a waste heat power generation collecting cylinder (2), the steam outlet of the waste heat power generation collecting cylinder (2) is connected with a sludge drying system (3), the sludge drying system (3) is connected with a condensed water treatment system (4) through a feed water pipeline, and the condensed water treated by the condensed water treatment system (4) flows back to the AQC boiler (1).

2. The sludge dewatering and condensate water recycling device according to claim 1, characterized in that: The sludge drying system (3) comprises a desuperheater (31), a sludge dryer (32) and a cement kiln (34), the waste heat power generation collecting cylinder (2) is connected with the sludge dryer (32) through a steam pipeline, and the desuperheater (31) is arranged between the waste heat power generation collecting cylinder (2) and the sludge dryer (32); the sludge dryer (32) is connected with a condensed water recovery tank (33) through a feed water pipeline.

3. The sludge dewatering and condensate water recycling device according to claim 1, characterized in that: The condensed water treatment system (4) comprises a desalted water tank (41), a desalted water pump (42), a deaerator (43) and a high-pressure feed water pump (44) which are sequentially connected through a feed water pipeline, and the water outlet end of the high-pressure feed water pump (44) is connected with the feed water main pipeline of the AQC boiler (1).

4. The sludge dewatering and condensate water recycling device according to claim 1, characterized in that: The steam outlet of the waste heat power generation collecting cylinder (2) is also connected with a steam turbine generator unit (5).

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