TWM597772U - Energy-saving device for ashing sludge - Google Patents

Abstract

This new model relates to an energy-saving device for ashing sludge, including: a drying furnace, which uses superheated steam to provide a drying environment of 120~180℃ to dry the sludge; and an ashing furnace, which uses electric heat to provide a temperature of 500~1000℃ The high-temperature environment decomposes the organic matter in the dried sludge, leaving inorganic ash; this way, the combination of the two-stage treatment equipment "evaporate first, then ash", and obtain the additive effect of 1+1>2. It can solve the problem that the prior art wastes a lot of heat energy during the sludge drying period, and has the effect of saving energy during the sludge drying period.

Description

Energy-saving device for ashing sludge

This model relates to an energy-saving device for ashing sludge, especially a designer who first dries the sludge and then ashes the dried sludge.

According to, the sludge produced by wastewater treatment contains water, organic matter, metal, sand...and other components. If you want to recycle the sludge into cement raw materials, it needs to go through proper ashing treatment, especially the smelly organic matter, which must use high temperature Decompose and remove thoroughly to avoid odor; press again, as shown in [Figure 1], when the sludge is heated, the evaporation rate of its moisture first is the drying constant rate period and then the drying deceleration period. The drying constant rate period refers to the shallow layer of sludge The moisture easily escapes the surface and is evaporated, causing the evaporation rate of the moisture to maintain a constant speed. The drying deceleration period is because the moisture in the deep layer of the sludge is not easily escaped from the surface and is evaporated, causing the evaporation rate of the moisture to gradually decelerate

However, the conventional method of processing recycled sludge into cement raw materials is to directly dry the sludge and burn it into ash at a high temperature enough to ash the sludge; however, since the early stage of the treatment is the sludge drying period (including drying Constant speed period and drying deceleration period), a drying temperature of more than 100 degrees Celsius has a good drying efficiency, too high drying temperature can not increase the evaporation rate of water proportionally (especially the drying deceleration period), resulting in enough dust The high temperature of the chemical sludge cannot make equal contributions to the drying of the sludge, thus wasting a lot of heat energy invisibly.

The main purpose of this new model is to solve the problem of the prior art wasting a lot of heat energy during the sludge drying period. The combination of the two-stage treatment equipment "evaporate first and then ash" has the effect of saving energy during the sludge drying period.

In order to achieve the above-mentioned effects, the technical features of the present invention include: a drying oven, which uses The superheated steam provides a drying environment of 120~180℃ to dry the sludge; and an ashing furnace is installed downstream of the drying furnace to use electric heat to provide a high temperature environment of 500~1000℃ to decompose the organic matter in the dried sludge. The remaining inorganic ash and slag; among them, the drying furnace is a steam-heated drying furnace, and the internal steam nozzle provides a drying environment of 120~180℃, the ashing furnace is an electric furnace, and the internal electric heater is used to provide High temperature environment of 500~1000℃.

In addition, it also includes a conveyor belt for conveying sludge through the drying furnace and then through the ashing furnace.

According to the aforementioned features, the drying furnace is a spiral drying furnace, which is provided with a sludge inlet, a steam inlet, a feeding screw, and a discharge port; and the steam inlet is connected to a superheated steam source.

According to the aforementioned features, the electric heating furnace may further include a temperature sensor for sending the temperature signal of the electric heating furnace to a control unit, and then the control unit adjusts and controls the temperature of the electric heater.

In this way, a dry environment of more than 100 degrees Celsius is provided to dry the sludge, and then a high temperature environment of more than 500 degrees Celsius is provided to ash the dried sludge. The two-stage treatment method can reduce the use of the sludge during the drying period. Thermal energy.

10: Drying furnace

11: Sludge inlet

12: Steam inlet

13: Feeding screw

14: Outlet

20: electric furnace

21: electric heater

30: Conveying device

40: Superheated steam source

41: boiler

50: control unit

51: temperature sensor

[Figure 1] is an explanatory diagram of water evaporation rate when sludge is heated.

[Figure 2] is a schematic diagram of the implementation steps and equipment of the present invention.

[Figure 3] is an explanatory diagram of the temperature and time for the implementation of the "first evaporation, then ashing" of the present invention.

[Figure 4] is an explanatory diagram of the water content and time of the sludge in the implementation of "evaporate first, then ash".

First of all, please refer to [Figure 2]. The implementation steps of the present invention include: a drying Step, using the steam nozzle 11 in the steam heating type drying furnace 10 to provide superheated steam at 120~180℃ to dry the sludge; and an ashing step, using the electric heater 21 in the electric heating (ashing) furnace 20 to provide 500~ In a high temperature environment of 1000°C, the dried sludge is decomposed by high temperature to decompose organic matter, and the remaining inorganic ash can be used as cement raw material; in addition, it also includes a conveying step, using a conveyor belt 30 to convey the sludge through the drying furnace 10 The electric furnace 20.

In this embodiment, the drying furnace 10 may be a spiral drying furnace 10, which is provided with a sludge inlet 11, a steam inlet 12, a feeding screw 13, and a discharge outlet 14. The steam inlet 12 is connected to a superheated steam source 40. The superheated steam source 40 can be high-temperature superheated steam discharged from a boiler 41 in a factory, which can achieve economic benefits of waste gas recycling and reuse. However, the spiral drying oven 10 is a prior art (Prior Art), and its principle and detailed structure are not the subject of the patent of the present invention, and will not be repeated.

Furthermore, the electric heating furnace 20 may further include a temperature sensor 51 for sending the temperature signal of the electric heating furnace 20 to a control unit 50, and then the control unit 50 adjusts and controls the electric heater 21 The best temperature.

Based on this structure, the new model improves the conventional treatment method of directly drying and burning the sludge into ash by using high temperature throughout the entire process of recycled sludge, as shown in [Figure 3], first providing a dry environment of more than 100 degrees Celsius. The sludge (A) is dried, and then a high temperature environment above 500 degrees Celsius is provided to ash the dried sludge in a two-stage process of "evaporate first, then ash". As shown in [Figure 4], the temperature and time explanatory diagram of the implementation of the "evaporation first, then ashing" of the present invention, that is, if the sludge starts to use the pyrolysis organic matter of the electric heater 21 for the whole process, not only the electric heating of the ashing In addition to expensive electricity costs, as mentioned above and [Figure 1], too high a drying temperature can not increase the evaporation rate of water proportionally (especially during the drying deceleration period), resulting in a high temperature enough to ash the sludge Unable to make equal contributions to the drying of sludge, thus wasting a lot of heat energy Invisible. Therefore, the two-stage treatment device of the new type of "evaporate first, then ash" can reduce the heat energy used in the sludge drying period. The heat energy used in the sludge drying period can also come from steam waste heat. The energy-saving effect of sludge drying period, and then obtain the additive effect of 1+1>2.

In summary, the technical means disclosed in this new model do have new patent requirements such as "novelty", "progressiveness" and "available for industrial use". I pray that the Jun Bureau will grant patents to encourage new models without any responsibility. Sense of virtue.

However, the drawings and descriptions disclosed above are only the preferred embodiments of the present invention. Any modification or equivalent change made in accordance with the spirit of this case by those familiar with the art should still be included in the scope of the patent application in this case.

10: Drying furnace

11: Sludge inlet

12: Steam inlet

13: Feeding screw

14: Outlet

20: electric furnace

21: electric heater

30: Conveying device

40: Superheated steam source

41: boiler

50: control unit

51: temperature sensor

Claims (6)

An energy-saving device for ashing sludge, including: a drying furnace, which provides a drying environment of 120~180℃ to dry the sludge; and an ashing furnace, which is arranged downstream of the drying furnace to provide 500~ The high temperature environment of 1000℃ decomposes the organic matter in the dried sludge, leaving inorganic ash residue. The energy-saving device for ashing sludge as described in item 1 of the scope of patent application, wherein the drying furnace is a steam-heated drying furnace, and an internal steam nozzle is used to provide a drying environment of 120-180°C. The energy-saving device for ashing sludge as described in item 1 or 2 of the scope of patent application, wherein the ashing furnace is an electric furnace, and the internal electric heater is used to provide a high temperature environment of 500 to 1000 ℃. The energy-saving device for ashing sludge as described in item 3 of the scope of patent application further includes a conveying device for conveying sludge through the drying furnace and then the ashing furnace. The energy-saving device for ashing sludge as described in item 1 of the scope of patent application, wherein the drying furnace is a spiral drying furnace, which is equipped with a sludge inlet, a steam inlet, and a feeding screw, A discharge port; and the steam inlet is connected with a superheated steam source. The energy-saving device for ashing sludge as described in item 1 of the scope of patent application, wherein the electric furnace may further include a temperature sensor for sending the temperature signal of the electric furnace to a control unit, and then The temperature of the electric heater is adjusted and controlled by the control unit.

Images