Sludge thermal drying treatment equipment

Abstract

The utility model relates to the technical field of sludge treatment especially relates to a sludge heat drying treatment equipment, including drying machine, expansion device, first steam pipeline, second steam pipeline and water pump, the heat exchange cavity that passes through the sludge is set up in the drying machine, first steam pipeline and second steam pipeline all set up in the heat exchange cavity of drying machine, and the both ends of first steam pipeline are connected with steam source and expansion device respectively, the both ends of second steam pipeline are connected with expansion device respectively, and water pump is connected with the bottom of expansion device, through setting expansion device, can make the steam condensate water in first steam pipeline in the flash evaporation cavity expansion flash to form hot steam again, is transported into heat exchange cavity again by second steam pipeline and exchanges heat again, forms the condensed water, and the condensed water is discharged from water pump, solves the steam condensate water temperature high pressure big in the prior art sludge heat drying, needs additional cooling, increased the burden of condensed water recovery device, and the energy in steam condensate water is wasted technical problem.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sludge treatment especially relates to a sludge thermal drying treatment equipment. BACKGROUND

[0002] In the field of environmental science, sludge is mainly the product in the sewage treatment process, and its water content is as high as 60% to 80%. In order to reduce the cost of transportation and disposal, and to make pretreatment for subsequent incineration or landfill composting, the sludge is usually subjected to thermal drying treatment.

[0003] The existing sludge thermal drying treatment equipment usually heats and evaporates the water in the sludge by hot steam, mainly including a drying machine, a steam source and a condensate water recovery device. The steam source delivers hot steam to the drying machine through a pipeline, and transfers heat to the heater wall in the drying machine, so that the sludge on the other side of the wall is heated and the water evaporates. After the heat exchange in the drying machine, the temperature of the hot steam decreases, and the steam becomes liquid and becomes condensate water, which enters the condensate water recovery device.

[0004] However, the steam condensate water of sludge thermal drying usually has a temperature of about 140-170℃ and a pressure of 0.4-0.8MPa. The higher the steam temperature and pressure used for drying, the higher the temperature and pressure of the steam condensate water, and the more energy it contains. Before the steam condensate water is recovered, it needs to be cooled, which increases the burden of the condensate water recovery device and wastes the energy in the steam condensate water. SUMMARY

[0005] The utility model aims at providing a sludge thermal drying treatment equipment to solve the technical problem that the steam condensate water of sludge thermal drying has high temperature and high pressure, needs additional cooling, increases the burden of the condensate water recovery device and wastes the energy in the steam condensate water in the prior art.

[0006] In the first aspect, the utility model provides a sludge thermal drying treatment equipment, which comprises a drying machine, an expansion device, a first steam pipeline, a second steam pipeline and a water pump.

[0007] The drying machine is provided with a heat exchange cavity through which sludge passes, the first steam pipeline and the second steam pipeline are arranged in the heat exchange cavity of the drying machine, one end of the first steam pipeline extends out of the drying machine and is used for connecting with a steam source, the other end of the first steam pipeline extends out of the drying machine and is connected with the expansion device, the expansion device is provided with a flash evaporation cavity to enable the condensate water to be expanded and flashed, one end of the second steam pipeline extends out of the drying machine and is connected with the top of the expansion device, the other end of the second steam pipeline extends out of the drying machine and is connected with the expansion device, and the water pump is connected with the bottom of the expansion device.

[0008] Further, the sludge thermal drying treatment equipment further comprises a differential pressure transmitter;

[0009] The differential pressure transmitter is arranged in the expansion device to detect the water level of the condensed water in the flash evaporation cavity, and the differential pressure transmitter is connected with the water pump.

[0010] Further, the sludge thermal drying treatment equipment further comprises a steam supercharging device;

[0011] The steam supercharging device is arranged between the air inlet end of the second steam pipeline and the expansion device, and the steam supercharging device can increase the temperature and pressure of the steam.

[0012] Compared with the prior art, the sludge thermal drying treatment equipment provided by the utility model has the advantages that the first steam pipeline and the second steam pipeline are arranged in the heat exchange cavity of the drying machine, one end of the first steam pipeline is arranged to be connected with a steam source, the other end of the first steam pipeline is arranged to be connected with the expansion device, the expansion device is arranged to have a flash evaporation cavity, one end of the second steam pipeline is arranged to be connected with the top of the expansion device, the other end of the second steam pipeline is arranged to be connected with the expansion device, and the water pump is arranged to be connected with the bottom of the expansion device. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0014] Figure 1 It is a whole structure schematic view of the sludge thermal drying treatment equipment provided by the utility model embodiment.

[0015] Reference signs:

[0016] 100, drier; 200, flash tank; 300, first steam line; 400, second steam line; 500, water pump; 600, differential pressure transmitter; 700, trap. DETAILED DESCRIPTION

[0017] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0019] It should be noted that: similar reference numerals and letters indicate similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0020] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0021] In addition, the terms "horizontal", "vertical", "overhang" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0022] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term "arrangement", "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through intermediate medium indirectly connected, can be two elements inside the communication.For ordinary skilled in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0023] Some embodiments of the utility model will be described in detail below in conjunction with the drawings.In the case of no conflict, the following examples and features in examples can be combined with each other.

[0024] As Figure 1 Indicated, the utility model embodiment provides a kind of sludge heat drying treatment equipment, including dryer 100, expansion device 200, first steam pipeline 300, second steam pipeline 400 and water pump 500;Heat exchange cavity with sludge is provided in dryer 100, first steam pipeline 300 and second steam pipeline 400 are all arranged in the heat exchange cavity of dryer 100, one end of first steam pipeline 300 is stretched out of dryer 100 and is used to be connected with steam source, the other end of first steam pipeline 300 is stretched out of dryer 100 and is connected with expansion device 200;Expansion device 200 is provided with flash evaporation cavity, to enable condensate to expand and flash evaporate, one end of second steam pipeline 400 is stretched out of dryer 100 and is connected with the top of expansion device 200, the other end of second steam pipeline 400 is stretched out of dryer 100 and is connected with expansion device 200, water pump 500 is connected with the bottom of expansion device 200.

[0025] That is, a kind of sludge heat drying treatment equipment provided by the utility model, by setting expansion device 200, can make the high-temperature high-pressure steam condensate that first steam pipeline 300 completes heat exchange and discharges in expansion and flash evaporate in flash evaporation cavity again form hot steam, and by second steam pipeline 400 is transported to heat exchange cavity again heat exchange, form low-temperature low-pressure condensate, is discharged from water pump 500, solve the steam condensate temperature of sludge heat drying in the prior art high pressure, need additional cooling, increase the burden of condensate recovery device, waste the energy in steam condensate technical problem, reduce the energy loss of system, reduce the work load of circulating cooling system.

[0026] Specifically, the heat exchange cavity through which the sludge passes is arranged in the drier 100, the first steam pipeline 300 and the second steam pipeline 400 are both arranged as metal pipelines and pass through the heat exchange cavity. One end of the first steam pipeline 300 extends out of the drier 100 and is connected with a steam source, so that steam enters the first steam pipeline 300, then passes through the heat exchange cavity, exchanges heat with the sludge in the drier 100, evaporates the water in the sludge, and then the steam condenses into condensed water. The other end of the first steam pipeline 300 extends out of the drier 100 and is connected with the flash evaporation cavity of the expansion device 200. The condensed water has a temperature of about 140-170℃ and a pressure of 0.4-0.8 MPa, and the condensed water with pressure enters the flash evaporation cavity, expands and flashes, and forms hot steam. The top of the expansion device 200 is connected with one end of the second steam pipeline 400, so that the hot steam passes through the second steam pipeline 400 again, passes through the heat exchange cavity, exchanges heat with the sludge in the drier 100, evaporates the water in the sludge, and then forms condensed water with lower temperature and smaller pressure. The first steam pipeline 300 is arranged at the rear end of the sludge conveying direction, and the second steam pipeline 400 is arranged at the front end of the sludge conveying direction, so that the energy is used in stages. Finally, the condensed water is discharged through the bottom pipeline of the expansion device 200 by the water pump 500.

[0027] Further, the sludge heat drying treatment equipment further comprises a differential pressure transmitter 600; the differential pressure transmitter 600 is arranged in the expansion device 200 to detect the water level of the condensed water in the flash evaporation cavity, and the differential pressure transmitter 600 is connected with the water pump 500.

[0028] Specifically, the differential pressure transmitter 600 is arranged on the side wall of the expansion device 200 to detect the water level of the condensed water in the flash evaporation cavity. The differential pressure transmitter 600 is connected with the water pump 500 through a control system, the liquid level signal of the condensed water is transmitted to the control system, then the control system transmits an electric signal to adjust the water pump 500, so that the drainage is automatically adjusted and the liquid level is stabilized.

[0029] Further, the sludge heat drying treatment equipment further comprises a drain valve 700; the drain valve 700 is arranged between the second steam pipeline 400 and the expansion device 200 to limit the steam in the flash evaporation cavity from entering the second steam pipeline 400 in reverse.

[0030] Specifically, the drain valve 700 is arranged between the second steam pipeline 400 and the expansion device 200, and the drain valve 700 can pass steam in one direction, so that the steam in the expansion device 200 can be prevented from entering the condensed water pipeline in reverse.

[0031] Further, the sludge heat drying treatment equipment further comprises a steam pressure boosting device; the steam pressure boosting device is arranged between the air inlet end of the second steam pipeline 400 and the expansion device 200, and the steam pressure boosting device can increase the temperature and pressure of the steam.

[0032] Specifically, the steam supercharging device is arranged between the air inlet end of the second steam pipeline 400 and the expansion device 200, and the steam supercharging device can increase the temperature and pressure of the steam, thereby improving the steam quality and ensuring the drying effect of the sludge in the drying machine 100.

[0033] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sludge thermal drying treatment device, characterized in that, It includes a dryer (100), an expansion device (200), a first steam pipeline (300), a second steam pipeline (400), and a water pump (500); The dryer (100) is provided with a heat exchange chamber filled with sludge. The first steam pipe (300) and the second steam pipe (400) are both located in the heat exchange chamber of the dryer (100). One end of the first steam pipe (300) extends out of the dryer (100) and is used to connect to a steam source. The other end of the first steam pipe (300) extends out of the dryer (100) and is connected to the expansion device (200). The expansion device (200) is provided with a flash evaporation cavity to allow condensate to expand and flash evaporate. One end of the second steam pipe (400) extends out of the dryer (100) and is connected to the top of the expansion device (200). The other end of the second steam pipe (400) extends out of the dryer (100) and is connected to the expansion device (200). The water pump (500) is connected to the bottom of the expansion device (200).

2. The sludge thermal drying treatment equipment according to claim 1, characterized in that, The sludge thermal drying treatment equipment also includes a differential pressure transmitter (600); The differential pressure transmitter (600) is installed in the expansion device (200) to detect the water level of the condensate in the flash cavity. The differential pressure transmitter (600) is connected to the water pump (500).

3. The sludge thermal drying treatment equipment according to claim 1, characterized in that, The sludge thermal drying treatment equipment also includes a steam booster device; The steam booster is located between the air inlet of the second steam pipeline (400) and the expansion device (200), and the steam booster can increase the temperature and pressure of the steam.

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