Three-phase fluidized bed cleaner for descaling mud drying steam condenser and three-phase fluidized bed cleaner unit having the same

Abstract

The present invention discloses a three-phase fluidized bed cleaner for descaling a sludge drying steam condenser and a three-phase fluidized bed cleaner unit having the same. The three-phase fluidized bed cleaner comprises a three-phase fluidized bed cleaning device and a shell-and-tube condenser. The three-phase fluidized bed cleaning device is provided with solid particles and water, and a fluidizing air inlet and a sewage outlet are provided at the bottom. The lower end of the shell-and-tube condenser is connected to the upper end of the three-phase fluidized bed cleaning device. The shell-and-tube condenser is provided with a tube, and cooling water flows through the tube. The shell-and-tube condenser is provided with a sludge drying steam inlet, a fluidizing water injection port, a condensed water outlet, an uncondensed gas outlet and a fluidizing air outlet. The cleaner is used to perform simple and easy cleaning of the condenser for condensing sludge drying steam. On the one hand, it can effectively recover the water resources and heat in the gas to be condensed after the sludge is dried, and greatly reduce the amount of sewage to be disposed of. On the other hand, it solves the problem that the existing indirect heat exchanger is contaminated and scaled and is inconvenient to clean.

Description

Technical Field

[0001] The invention belongs to the field of mud drying steam condenser cleaning equipment, and in particular relates to a three-phase fluidized bed cleaner for descaling a mud drying steam condenser and a three-phase fluidized bed cleaner unit having the same. Background Art

[0002] A variety of muddy materials need to be dried, such as domestic sludge, coal slime, red mud, etc. The steam generated by drying these muddy materials is not pure. They contain dust particles, organic matter, etc. Domestic sludge steam also has strong odor and toxic gas components. Harmless steam is often discharged directly, while harmful steam is often sprayed and directly condensed to reduce the amount of gas disposal. However, this disposal method will turn clean cold water, which is dozens of times the amount of steam, into warm sewage, increasing the burden of water treatment. At the same time, if the steam contains non-condensable gases, they will carry more droplets and fine dust, which will bring difficulties to subsequent treatment. Indirect condensation of the steam generated by drying can not only recover heat, but also recover water resources. Even if the condensed water is still sewage, the subsequent disposal volume is much smaller. Since the saturated partial pressure of steam at 80-90℃ is already very low and the condensation heat transfer coefficient is very high, the condensing equipment will be very compact and the hot water produced will be very usable. However, the surface of the heat exchange tube is very easy to be contaminated, and the heat transfer effect will be deteriorated due to contamination and scaling. Good performance of the cleaning equipment is the key to whether the steam generated by the drying of mud can be used to recover heat in the condenser and simplify the subsequent water treatment process. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, one purpose of the present invention is to propose a three-phase fluidized bed cleaner for descaling a condenser of sludge drying steam and a three-phase fluidized bed cleaner unit having the same. The cleaner of the present application is used to simply and easily clean the condenser for condensing sludge drying steam. On the one hand, it can effectively recover the water resources and heat in the gas to be condensed after the sludge is dried, greatly reducing the amount of sewage to be disposed of; on the other hand, it solves the problem that the existing indirect heat exchanger is fouled and scaled and is inconvenient to clean.

[0004] In one aspect of the present invention, the present invention provides a three-phase fluidized bed cleaner for descaling a sludge drying steam condenser. According to an embodiment of the present invention, the cleaner comprises:

[0005] A three-phase fluidized bed cleaning device, wherein solid particles and water are arranged in the three-phase fluidized bed cleaning device, and a fluidizing air inlet and a sewage outlet are arranged at the bottom;

[0006] A shell-and-tube condenser, wherein the lower end of the shell-and-tube condenser is connected to the upper end of the three-phase fluidized bed cleaning device, and the shell-and-tube condenser is provided with shells and tubes, cooling water flows through the shell and tube condensers, and the shell-and-tube condenser is provided with a mud drying steam inlet, a fluidizing water injection port, a condensed water outlet, an uncondensed gas outlet and a fluidizing air outlet.

[0007] A three-phase fluidized bed cleaner for decontaminating a muddy drying steam condenser according to an embodiment of the present invention comprises a three-phase fluidized bed cleaning device and a shell-and-tube condenser, wherein the three-phase fluidized bed cleaning device is arranged below the shell-and-tube condenser. When the cleanliness of the tubes in the tube-in-tube condenser does not require cleaning, the solid particles and water in the three-phase fluidized bed cleaning device are in a static state, and the tube-in-tube condenser is in a condensing state. The mud drying steam enters from the mud drying steam inlet provided on the tube-in-tube condenser, is cooled and condensed by the cooling water in the tubes, and the condensed water is discharged from the condensed water outlet on the tube-in-tube condenser, and the uncondensed gas is discharged from the uncondensed gas outlet on the tube-in-tube condenser; when the cleanliness of the tubes in the tube-in-tube condenser requires cleaning, the mud drying steam inlet is closed, and water is injected through the fluidizing water injection port on the tube-in-tube condenser to make the water level higher than the uppermost tube of the tube-in-tube condenser. The injected water and the solid particles in the three-phase fluidized bed cleaning device are in a fluidized state driven by the fluidizing air blown in. The dirt on the surface of the tubes in the tube-in-tube condenser is removed through the friction of the solid particles on the dirt, and the fluidizing air is discharged from the fluidizing air outlet on the tube-in-tube condenser. After the cleaning is completed, the fluidized air inlet is closed, the solid particles gradually settle, and the condensate outlet is opened, so that the water in the tubes of the submerged tube-in-tube condenser is discharged, and the tube-in-tube condenser is switched to the condensing state. After repeated operations, the particles settled in the three-phase fluidized bed cleaning device will carry dirt and need to be regularly discharged, cleaned, and replaced. Therefore, the cleaning device of the present application is used to perform simple and easy cleaning of the condenser for condensing muddy dry steam. On the one hand, it can effectively recover the water resources and heat in the gas to be condensed after the muddy material is dried, greatly reducing the amount of sewage that needs to be disposed of; on the other hand, it solves the problem that the existing indirect heat exchanger is contaminated and scaled and is inconvenient to clean.

[0008] In addition, the three-phase fluidized bed cleaner for descaling a muddy drying steam condenser according to the above embodiment of the present invention may also have the following additional technical features:

[0009] In some embodiments of the present invention, the shell-and-tube condenser includes a heat exchange zone and a return zone from top to bottom, and a baffle extending from top to bottom is provided in the heat exchange zone, and the baffle divides the heat exchange zone into a first sub-heat exchange zone and a second sub-heat exchange zone, the first sub-heat exchange zone includes an air intake zone and a downward heat exchange zone from top to bottom, and the second sub-heat exchange zone includes an upward heat exchange zone and an exhaust zone from bottom to top, the air intake zone is provided with the mud drying steam inlet, the fluidized bed water injection port and the fluidizing air outlet, the downward heat exchange zone and the upward heat exchange zone are both provided with a plurality of the shell tubes, the exhaust zone is provided with the uncondensed gas outlet and the fluidizing air outlet, and the condensate outlet is arranged in the return zone.

[0010] In some embodiments of the present invention, the mud drying steam inlet and the uncondensed gas outlet are arranged on opposite sides of the shell-and-tube condenser.

[0011] In some embodiments of the present invention, the shell and tube condenser includes an air intake area, a heat exchange area and an exhaust area from top to bottom, the mud drying steam inlet, the fluidizing water injection inlet and the fluidizing air outlet are arranged in the air intake area, the heat exchange area is provided with a plurality of the shell and tubes, and the uncondensed gas outlet and the condensed water outlet are arranged in the exhaust area.

[0012] In some embodiments of the present invention, the solid particles are hard particles with a particle size of 0.2 to 1.5 mm.

[0013] In a second aspect of the present invention, the present invention provides a three-phase fluidized bed cleaner unit. According to an embodiment of the present invention, the cleaner unit includes at least two of the above-mentioned cleaners. Thus, by using at least two of the above-mentioned cleaners, at least one of which performs condensation heat exchange, and the other at least one cleaner performs cleaning, and then switching the state at a fixed interval, continuous treatment of the gas to be condensed is achieved.

[0014] In addition, the three-phase fluidized bed cleaner unit according to the above embodiment of the present invention may also have the following additional technical features:

[0015] In some embodiments of the present invention, the above-mentioned cleaner unit further comprises: a control device, wherein the control device is connected to an instrument and / or an actuator component of each of the cleaners, thereby improving the automation level of the cleaner unit.

[0016] In some embodiments of the present invention, each of the waste cleaners has a control valve at the fluidizing water injection port, mud drying steam inlet, uncondensed gas outlet, fluidizing air outlet, condensed water outlet, fluidizing air inlet and sewage outlet, and the control device is connected to each of the control valves. Thus, the automation level of the waste cleaner unit can be improved.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a cross-sectional view in one direction of a three-phase fluidized bed cleaner for decontaminating a sludge drying steam condenser according to an embodiment of the present invention when the cleaner is in a condensing state;

[0020] Figure 2 is a cross-sectional view in one direction of a three-phase fluidized bed cleaner for decontaminating a sludge drying steam condenser according to another embodiment of the present invention when the cleaner is in a condensing state;

[0021] Figure 3 is a cross-sectional view in another direction of a three-phase fluidized bed cleaner for decontaminating a sludge drying steam condenser according to an embodiment of the present invention when the cleaner is in a condensing state;

[0022] Figure 4 is a cross-sectional view in one direction of a three-phase fluidized bed cleaner for cleaning muddy material drying steam condenser according to one embodiment of the present invention when the cleaner is in a cleaning state;

[0023] Figure 5 is a cross-sectional view in one direction of a three-phase fluidized bed cleaner for decontaminating a sludge drying steam condenser according to another embodiment of the present invention when the cleaner is in a condensing state;

[0024] Figure 6 is a cross-sectional view in another direction of a three-phase fluidized bed cleaner for decontaminating a sludge drying steam condenser according to another embodiment of the present invention when the cleaner is in a condensing state;

[0025] Figure 7 is a cross-sectional view in one direction of a three-phase fluidized bed cleaner for cleaning muddy drying steam condensers according to another embodiment of the present invention when the cleaner is in a cleaning state;

[0026] Figure 8 Schematic diagram of the structure of a three-phase fluidized bed cleaner unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] In one aspect of the present invention, a three-phase fluidized bed cleaner is provided for decontaminating a sludge drying steam condenser. Figure 1 The cleaner 1000 includes a shell-and-tube condenser 100 and a three-phase fluidized bed cleaner 200 .

[0033] According to an embodiment of the present invention, referring to Figure 1 The shell-and-tube condenser 100 is provided with a shell-and-tube 10, and cooling water flows through the shell-and-tube condenser 100. The shell-and-tube condenser 100 is provided with a mud drying steam inlet 101, a fluidizing water injection port 102, a condensed water outlet 103, an uncondensed gas outlet 104 and a fluidizing air outlet 105. It should be noted that those skilled in the art can select the specific positions of the mud drying steam inlet 101 and the uncondensed gas outlet 104 on the shell and tube condenser 100 according to actual needs. For example, the mud drying steam inlet 101 is arranged at the top of the shell and tube condenser 100, and the uncondensed gas outlet 104 is arranged at the lower end of the side wall of the shell and tube condenser 100; for another example, the drying steam inlet 101 is arranged at the lower end of the upper side wall of the shell and tube condenser 100, and the uncondensed gas outlet 104 is arranged at the top of the shell and tube condenser 100; or both the mud drying steam inlet 101 and the uncondensed gas outlet 104 are arranged at the top of the shell and tube condenser 100.

[0034] According to an embodiment of the present invention, referring to Figure 1 The upper end of the three-phase fluidized bed cleaning device 200 is connected to the lower end of the shell-and-tube condenser 100, and solid particles 21 and water are arranged in the three-phase fluidized bed cleaning device 200, and a fluidizing air inlet 201 and a sewage outlet 202 are arranged at the bottom. Preferably, the solid particles 21 in the three-phase fluidized bed cleaning device 200 are hard particles with a particle size of 0.2 to 1.5 mm, so as to improve the removal efficiency of the dirt on the shell-and-tube condenser 10. It should be noted that those skilled in the art can select the specific type of hard particles according to actual needs, as long as the dirt on the shell-and-tube condenser 100 can be effectively removed.

[0035] Specifically, when the cleanliness of the tubes 10 in the tube-in-tube condenser 100 does not require cleaning, the solid particles 21 and water in the three-phase fluidized bed cleaning device 200 are in a static state, and the tube-in-tube condenser 100 is in a condensing state. The muddy material drying steam enters from the muddy material drying steam inlet 101 provided on the tube-in-tube condenser 100, is cooled and condensed by the cooling water in the tubes 10, and the condensed water is discharged from the condensed water outlet 103 on the tube-in-tube condenser 100, and the uncondensed gas is discharged from the uncondensed gas outlet 104 on the tube-in-tube condenser 100; when the tube-in-tube condenser 100 is in a static state, the solid particles 21 and water in the three-phase fluidized bed cleaning device 200 are in a static state, and the tube-in-tube condenser 100 is in a condensing state. When the cleanliness of the tubes 10 in the tube condenser 100 needs to be cleaned, the mud drying steam inlet 101 is closed, and water is injected through the fluidizing water injection port 102 located on the tube condenser 100 to make the water level higher than the uppermost tube 10 of the tube condenser 100. The injected water and the solid particles 21 in the three-phase fluidized bed cleaning device 200 are in a fluidized state driven by the fluidizing air blown in. The dirt on the surface of the tubes 10 in the tube condenser 100 is removed through the friction of the solid particles 21 on the dirt, and the fluidizing air is discharged from the fluidizing air outlet 105 on the tube condenser 100. After the cleaning is completed, the fluidizing air inlet 201 is closed, the solid particles 21 gradually settle, and the condensate outlet 103 is opened, so that the water that submerges the tubes 10 in the tube condenser 100 is discharged, and the tube condenser 100 is transferred to the condensing state. After repeated operations, the particles settled in the three-phase fluidized bed cleaning device 200 will carry dirt and need to be discharged, cleaned and replaced regularly.

[0036] In order to describe more clearly, the following Figure 2 to Figure 4 A shell-and-tube condenser 100 according to an embodiment of the present invention is described in detail.

[0037] According to an embodiment of the present invention, referring to Figure 2 to Figure 4 The shell-and-tube condenser 100 includes a heat exchange zone 11 and a return zone 12 from top to bottom. A baffle 13 extending from top to bottom is provided in the heat exchange zone 11. The baffle 13 divides the heat exchange zone 11 into a first sub-heat exchange zone 14 and a second sub-heat exchange zone 15. The first sub-heat exchange zone 14 includes an air intake zone 16 and a downward heat exchange zone 17 from top to bottom. The second sub-heat exchange zone 15 includes an upward heat exchange zone 18 and an exhaust zone 19 from bottom to top. The air intake zone 16 is provided with a mud drying steam inlet 101, a fluidizing water injection port 102 and a fluidizing air outlet 105. The downward heat exchange zone 17 and the upward heat exchange zone 18 are both provided with a plurality of shell tubes 10. The exhaust zone 19 is provided with an uncondensed gas outlet 104 and a fluidizing air outlet 105. The return zone 12 is provided with a condensate outlet 103.

[0038] Specifically, refer to Figure 2 and Figure 3When the shell-and-tube condenser 100 is in the condensing state, the fluidizing water injection port 102 and the fluidizing air outlet 105 are closed, and the mud drying steam inlet 101, the uncondensed gas outlet 104 and the condensed water outlet 103 are opened. The mud drying steam is supplied from the mud drying steam inlet 101 to the air inlet area 16. After the mud drying steam contacts and exchanges heat with the shell tube 10 for supplying cooling water in the downward heat exchange area 17, it is turned back upward through the return area 12 and contacts with the shell tube 10 for supplying cooling water in the upward heat exchange area 18. 0 contact heat exchange, the steam in the mud drying steam condenses into water and then falls into the three-phase fluidized bed cleaning device 200, and then is discharged through the condensed water outlet 103, the uncondensed gas contained in the mud drying steam passes through the air intake area 16, the downward heat exchange area 17, the return area 12, the upward heat exchange area 18 and the exhaust area 19 in sequence, and is discharged from the uncondensed gas outlet 104 set in the exhaust area 19. At the same time, during the heat exchange process between the mud drying steam and the tube 10, the mud carried in the mud drying steam adheres to the tube 10. Reference Figure 4 When the cleanliness of the tubes 10 in the tube-in-tube condenser 100 needs to be cleaned, the dry steam inlet 101, the uncondensed gas outlet 104 and the condensed water outlet 103 on the tube-in-tube condenser 100 are closed, and the fluidizing water injection port 102, the fluidizing air outlet 105 on the tube-in-tube condenser 100 and the fluidizing air inlet 201 on the fluidized bed cleaning device 200 are opened, that is, water is injected into the tube-in-tube condenser 100 and the three-phase fluidized bed cleaning device 200 through the fluidizing water injection port 102, so that the water level exceeds the uppermost tubes 10 in the upward heat exchange zone 18 and the downward heat exchange zone 17, and then the steam is discharged through the fluidizing water injection port 102. The fluidizing air inlet 201 supplies fluidizing air to the three-phase fluidized bed cleaning device 200. Under the agitation of the fluidizing air, the liquid drives the solid particles 21 in the three-phase fluidized bed cleaning device 200 to be strongly disturbed. Since the upward heat exchange area 18 and the downward heat exchange area 17 are full of water, the gas-liquid-solid three phases clean the tubes 10 in the upward heat exchange area 18 and the downward heat exchange area 17. In addition, the water can make the friction of the solid particles 21 on the surface of the tubes 10 more moderate. After the cleaning is completed, the fluidizing air inlet 201 is closed, the particles gradually settle, and then the condensate outlet 103 is opened to discharge the sewage. After repeated use, the solid particles in the three-phase fluidized bed cleaning device 200 will be reduced and carry dirt. The sewage outlet 202 on the three-phase fluidized bed cleaning device 200 is opened to discharge the sewage and update the solid particles.

[0039] Preferably, reference Figure 2, the sludge drying steam inlet 101 and the uncondensed gas outlet 104 are arranged on opposite sides of the tube-and-tube condenser 100, that is, the uncondensed gas contained in the sludge drying steam flows in a double return on the gas (steam) side, that is, it initially enters from one side of the upper part of the air intake area 16, passes through the air intake area 16 and the downward heat exchange area 17 from top to bottom, enters the return area 12, turns, and then passes through the upward heat exchange area 18 and the exhaust area 19 from bottom to top, and the uncondensed gas is led out from the other side of the upper part of the exhaust area 19, thereby increasing the residence time of the sludge drying steam in the tube-and-tube condenser 100, and significantly increasing the water volume and heat recovery rate therein. Further, each tube 10 is arranged in the horizontal direction, and multiple tubes 10 are arranged at intervals along the height direction of the tube-and-tube condenser 100, and the condensate outlet 103 is arranged at the lower end of the side wall of the return area 12.

[0040] In order to describe more clearly, the following Figure 5 to Figure 7 A shell and tube condenser 100 according to another embodiment of the present invention is described in detail.

[0041] According to an embodiment of the present invention, the shell and tube condenser 100 includes an air intake area 11, a heat exchange area 12 and an exhaust area 13 from top to bottom, a mud drying steam inlet 101, a fluidizing water injection port 102 and a fluidizing air outlet 105 are arranged in the air intake area 11, a plurality of shell and tubes 10 are arranged in the heat exchange area 12, and an uncondensed gas outlet 104 and a condensed water outlet 103 are arranged in the exhaust area 13.

[0042] Specifically, refer to Figure 5 and Figure 6 When the shell-and-tube condenser 100 is in the condensing state, the fluidizing water injection port 102 and the fluidizing air outlet 105 are closed, and the mud drying steam inlet 101, the uncondensed gas outlet 104 and the condensed water outlet 103 are opened. The mud drying steam is supplied from the mud drying steam inlet 101 to the air inlet area 11. The mud drying steam goes down and contacts the shell tube 10 supplying cooling water in the heat exchange area 12 for heat exchange. The steam in the mud drying steam condenses into water and falls into the three-phase fluidized bed cleaning device 200, and then is discharged through the condensed water outlet 103. The uncondensed gas contained in the mud drying steam is discharged through the uncondensed gas outlet 104 on the exhaust area 13. At the same time, during the heat exchange process between the mud drying steam and the shell tube 10, the mud carried in the mud drying steam adheres to the shell tube 10. Reference Figure 7When the cleanliness of the tubes 10 in the tube-in-tube condenser 100 needs to be cleaned, the dry steam inlet 101, the uncondensed gas outlet 104 and the condensed water outlet 103 on the tube-in-tube condenser 100 are closed, and the fluidizing water injection port 102, the fluidizing air outlet 105 on the tube-in-tube condenser 100 and the fluidizing air inlet 201 on the fluidized bed cleaning device 200 are opened, that is, water is injected into the tube-in-tube condenser 100 and the three-phase fluidized bed cleaning device 200 through the fluidizing water injection port 102, so that the water level exceeds the uppermost tube 10 in the heat exchange zone 12, Then, fluidizing air is supplied to the three-phase fluidized bed cleaning device 200 through the fluidizing air inlet 201. Under the agitation of the fluidizing air, the liquid drives the solid particles 21 in the three-phase fluidized bed cleaning device 200 to be strongly disturbed, and because the heat exchange area 12 is full of water, the gas-liquid-solid three-phases clean the tubes 10 in the heat exchange area 12, and the water can make the friction of the solid particles 21 on the surface of the tubes 10 more relaxed. After the cleaning is completed, the fluidizing air inlet 201 is closed, the particles gradually settle, and then the condensate outlet 103 is opened to discharge the sewage. After multiple uses, the solid particles in the three-phase fluidized bed cleaning device 200 will be reduced and carry dirt. The sewage outlet 202 on the three-phase fluidized bed cleaning device 200 is opened to discharge the sewage and update the solid particles.

[0043] In another aspect of the present invention, the present invention proposes a three-phase fluidized bed cleaner unit. According to an embodiment of the present invention, the three-phase fluidized bed cleaner unit includes at least two of the above-mentioned cleaners 1000. Thus, by using at least two of the above-mentioned cleaners 1000, at least one of which performs condensation and the other at least one condenser 1000 performs cleaning, and then switching the state at a fixed interval, the continuous treatment of the gas to be condensed is achieved.

[0044] Furthermore, the above-mentioned three-phase cleaner unit further comprises a control device 300, which is connected to the instrument and / or actuator components of each cleaner 1000, that is, the working state of the cleaner 1000 is switched through the control device 300. Figure 8 , to include two Figure 2 to Figure 4Take the waste cleaner 1000 of FIG. 1 as an example, one of the waste cleaners 1000 is in the condensing state, and the other waste cleaner 1000 is in the cleaning state. At a fixed interval, the control device 300 controls the switching of the working states of the two waste cleaners 1000. Preferably, the mud drying steam inlet 101, the fluidizing water injection port 102, the condensed water outlet 103, the uncondensed gas outlet 104, the fluidizing air outlet 105, the fluidizing air inlet 201 and the sewage outlet 202 on each waste cleaner 1000 are all provided with control valves (not shown), and the control device 300 is connected to each control valve, that is, the control device 300 controls each waste cleaner 1000 by controlling the control valves on the inlet and outlet of each waste cleaner 1000. In this way, the automation level of the waste cleaner unit can be improved. It should be noted that those skilled in the art can select the specific structure of the control device 300 according to actual needs, as long as the above functions can be achieved. At the same time, the instruments and actuator components on the sewage cleaner 1000 of the present application are conventional structures in the field and will not be described here.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0046] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A three-phase fluidized bed cleaner for descaling a sludge drying steam condenser, characterized in that: include: A three-phase fluidized bed cleaning device, wherein solid particles and water are arranged in the three-phase fluidized bed cleaning device, and a fluidizing air inlet and a sewage outlet are arranged at the bottom; A shell-and-tube condenser, wherein the lower end of the shell-and-tube condenser is connected to the upper end of the three-phase fluidized bed cleaning device, and the shell-and-tube condenser is provided with a tube, cooling water flows through the tube, and the shell-and-tube condenser is provided with a mud drying steam inlet, a fluidizing water injection port, a condensed water outlet, an uncondensed gas outlet, and a fluidizing air outlet; The shell-and-tube condenser comprises an air intake area, a heat exchange area and an exhaust area from top to bottom. The mud drying steam inlet, the fluidizing water injection port and the fluidizing air outlet are arranged in the air intake area. The heat exchange area is provided with a plurality of the shell-and-tubes. The uncondensed gas outlet and the condensed water outlet are arranged in the exhaust area.

2. The cleaner according to claim 1, characterized in that: The shell-and-tube condenser includes a heat exchange zone and a return zone from top to bottom. A baffle extending from top to bottom is provided in the heat exchange zone, and the baffle divides the heat exchange zone into a first sub-heat exchange zone and a second sub-heat exchange zone. The first sub-heat exchange zone includes an air intake zone and a downward heat exchange zone from top to bottom, and the second sub-heat exchange zone includes an upward heat exchange zone and an exhaust zone from bottom to top. The air intake zone is provided with the mud drying steam inlet, the fluidizing water injection port and the fluidizing air outlet. The downward heat exchange zone and the upward heat exchange zone are both provided with a plurality of the shell tubes. The exhaust zone is provided with the uncondensed gas outlet and the fluidizing air outlet, and the condensate outlet is provided in the return zone.

3. The cleaner according to claim 2, characterized in that: The mud drying steam inlet and the uncondensed gas outlet are arranged on opposite sides of the shell-and-tube condenser.

4. The cleaner according to claim 1, characterized in that: The solid particles are hard particles with a particle size of 0.2 to 1.5 mm.

5. A three-phase fluidized bed cleaner unit, characterized in that: include: At least two dirt cleaners according to any one of claims 1 to 4.

6. The cleaner unit according to claim 5, characterized in that Further including: A control device is connected to the instrument and / or actuator components of each of the cleaners.

7. The cleaner unit according to claim 6, characterized in that Each of the cleaners has a control valve at the fluidizing water injection port, mud drying steam inlet, uncondensed air outlet, fluidizing air outlet, condensed water outlet, fluidizing air inlet and sewage outlet, and the control device is connected to each of the control valves.

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