Blowdown device for power plant boiler

Abstract

The utility model relates to a blowdown device for a power station boiler. The blowdown device comprises a boiler main body, one end of the blow-off pipe is communicated with the boiler main body; the filter shell is of a box body structure with an inner cavity, and the filter shell is communicated with the other end of the blow-off pipe; the blocking mechanism is connected with the blow-off pipe; the pollution discharge mechanism is arranged below the plugging mechanism and is connected with the pollution discharge pipe; the filter plate is arranged in the filter shell; the cleaning mechanism is arranged in the filter shell and is arranged below the filter screen; and a limiting mechanism. And the limiting mechanism is connected with the filter shell. According to the blowdown device for the boiler, the filter plate can be backwashed, operation is convenient, the mode of replacing the filter plate is also convenient, and the use efficiency of the blowdown device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler sewage discharge, in particular to a sewage discharge device for a boiler in a power plant. Background Art

[0002] During the operation of the steam boiler in the power plant, it is necessary to continuously discharge the sewage to remove the boiler water with high salt content and make the water quality of the boiler water reach the specified index, so as to ensure the safe operation of the boiler. At present, the continuous sewage discharge of most steam boilers adopts the manual method. The laboratory technician takes samples of the boiler water for testing. When the water quality index (chloride or alkalinity) of the boiler water exceeds the specified standard, the sewage valve is manually opened to discharge the sewage. However, in the existing technology, the sewage discharge equipment does not have a filtering function. In order to discharge the sewage more thoroughly, the sewage and the impurities in the sewage are discharged together, and the water cannot be recovered and reused, which wastes water resources.

[0003] Among them, announcement number CN216790149U discloses a boiler sewage discharge device, including a boiler body, a sewage pipe is provided at the bottom of the boiler body, a water quality detector is provided in the sewage pipe, a valve is provided on the sewage pipe, a protective cover is fixedly provided on the top of the sewage pipe, a motor is fixedly provided on the top inner wall of the protective cover, the output shaft of the motor and the adjusting wheel on the valve are welded together, a signal receiving module, a central processing module and a timing module are provided on the inner wall of the protective cover, a filtering structure is provided on the sewage outlet of the sewage pipe, the filtering structure includes a filter box, two guide plates are fixedly provided on the inner walls on both sides of the filter box, and two springs are fixedly provided on the inner wall of one side of the filter box. However, the filter plate cannot be backwashed in this technical solution. The filter plate will be blocked by impurities after being used for a period of time and can only be disassembled and cleaned, and then installed back into the device after cleaning. The operation is cumbersome, time-consuming and labor-intensive, and the equipment needs to be shut down for a long time during the period, which greatly reduces the utilization efficiency of the device. Utility Model Content

[0004] In order to solve the above problems in the prior art, the purpose of the utility model is to provide a sewage discharge device for a power plant boiler. The specific technical solution adopted is as follows:

[0005] A sewage discharge device for a power plant boiler comprises a boiler body; a sewage discharge pipe, one end of which is connected to the boiler body; a filter shell, which is a box structure with an inner cavity, and the filter shell is connected to the other end of the sewage discharge pipe; a plugging mechanism, which is connected to the sewage discharge pipe; a sewage discharge mechanism, which is arranged below the plugging mechanism and connected to the sewage discharge pipe; a filter plate, which is arranged inside the filter shell; a cleaning mechanism, which is arranged inside the filter shell and below the filter; and a limiting mechanism, which is connected to the filter shell. The sewage discharge device for a boiler of the present application can backwash the filter plate, is easy to operate, and the method of replacing the filter plate is also convenient, which improves the use efficiency of the device.

[0006] Optionally, the blocking mechanism includes a ball valve, which is arranged inside the sewage pipe. When the device works normally, the ball valve is open, and sewage can enter the interior of the filter shell through the sewage pipe. When the filter plate needs to be backwashed, the ball valve is rotated to close the sewage pipe.

[0007] Optionally, the device includes at least two sewage discharge mechanisms, so as to improve sewage discharge efficiency.

[0008] Optionally, the sewage discharge mechanism includes a sewage discharge pipe, which is arranged below the ball valve, has a first channel connected to the sewage discharge pipe, and also has a second channel. The sewage after cleaning the filter plate is discharged through the first channel and the second channel in sequence.

[0009] Optionally, the sewage discharge mechanism further includes a blocking ball and a spring disposed inside the drainage pipe, one end of the blocking ball abuts against the first channel, and the other end of the blocking ball is installed with a baffle; one end of the spring is connected to the baffle; and the other end of the spring is connected to the bottom of the drainage pipe. When the device is working normally, the blocking ball abuts against the first channel under the action of the spring to close the first channel.

[0010] Optionally, the cross-sections of the impurity discharge pipe and the baffle are square, so that the baffle cannot rotate inside the impurity discharge pipe, and the baffle can slide stably along the impurity discharge pipe.

[0011] Optionally, the cleaning mechanism includes a water pump and a water spray shell arranged at the bottom of the filter shell, a connecting pipe is arranged at the water outlet of the water pump, and the other end of the connecting pipe is connected to the water spray shell. The water in the lower half of the water spray shell can be pumped into the water spray shell by the water pump and conveniently sprayed into the impurity discharge pipe.

[0012] Optionally, the water spray shell is arranged directly below the filter plate, so as to facilitate cleaning of the filter plate.

[0013] Optionally, the limiting mechanism includes a left plate and a right plate; the left plate and the right plate are connected to the filter housing, an upper screw rod and a lower screw rod are arranged between the left plate and the right plate; the upper screw rod and the lower screw rod are sleeved with a left connecting plate and a right connecting plate. The filter plate is limited or released to facilitate replacement of the filter plate.

[0014] Optionally, the left connecting plate and the right connecting plate are L-shaped structures, so as to limit the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features and advantages of the present invention are described below, which explains the present invention in more detail based on embodiments in conjunction with the accompanying drawings.

[0016] Figure 1 It is a structural schematic diagram of the sewage discharge device of the utility model;

[0017] Figure 2 yes Figure 1 A partial cross-sectional view of

[0018] Figure 3 yes Figure 2 A magnified view of part A in FIG.

[0019] Figure 4 yes Figure 2 A magnified view of part B in FIG.

[0020] Figure 5 yes Figure 1 Enlarged view of section C in .

[0021] Among them, the main marks of the drawings in the figure are as follows:

[0022] 1- boiler body, 2- sewage pipe, 21- water quality detector, 3- filter shell, 31- upper plate, 32- front plate, 33- right plate, 34- fixed plate, 4- blocking mechanism, 41- ball valve, 42- valve stem, 43- first motor, 44- connecting plate, 5- sewage mechanism, 51- drainage pipe, 511- first channel, 512- second channel, 513- convex part, 514- bottom plate, 52- blocking ball, 53- baffle, 54- spring, 6- filter plate, 61- mounting plate , 7-cleaning mechanism, 71-water pump, 72-connecting pipe, 73-water spray shell, 74-box, 8-limiting mechanism, 81-left side plate, 82-right side plate, 83-upper screw, 84-lower screw, 85-left connecting plate, 86-right connecting plate, 87-pulley, 88-belt, 89-handle, 9-water outlet assembly, 91-water outlet pipe, 911-water outlet, 92-blocking plate, 93-slide plate, 94-slide rod, 95-spring, 10-second motor, 11-rotating rod. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower", "left", "right", "front", "back" and similar expressions used herein are only for the purpose of illustration and are not intended to limit the present invention.

[0024] A sewage discharge device for a power plant boiler comprises a boiler body 1; a sewage discharge pipe 2, one end of which is connected to the boiler body 1; a filter shell 3, which is a box structure with an inner cavity and is connected to the other end of the sewage discharge pipe 2; a plugging mechanism 4, which is connected to the sewage discharge pipe 2; a sewage discharge mechanism 5, which is arranged below the plugging mechanism 4 and connected to the sewage discharge pipe 2; a filter plate 6, which is arranged inside the filter shell 3; a cleaning mechanism 7, which is arranged inside the filter shell 3 and below the filter plate 6; and a limiting mechanism 8; the limiting mechanism 8 is connected to the filter shell 3.

[0025] In some embodiments, the blocking mechanism 4 includes a ball valve 41 , which is disposed inside the sewage pipe 2 .

[0026] like Figure 1 As shown, the sewage discharge device for power plant boilers of the present application includes a boiler body 1, a sewage discharge pipe 2 connected thereto is arranged at the lower end of the boiler body 1, and a water quality detector 21 is arranged near the upper end of the sewage discharge pipe 2 to detect the water quality of the liquid flowing out of the boiler body 1; the lower end of the sewage discharge pipe 2 is connected to the filter shell 3, and the filter shell 3 is a box structure with an inner cavity, and the lower end of the sewage discharge pipe 2 is connected to the upper end of the filter shell 3, so that the liquid flowing out of the boiler body 1 enters the interior of the filter shell 3. Figure 2 As shown, a filter plate 6 is arranged inside the filter shell 3, and the filter plate 6 is arranged horizontally just below the outlet of the sewage pipe 2 so that the filter plate 6 can filter the sewage; two fixed plates 34 are symmetrically arranged inside the filter shell 3, and the opposite parts of the two fixed plates 34 are provided with mounting parts for mounting the filter plate 6, and the upper surfaces of the fixed plates 34 are arranged inclined so that the sewage entering the filter shell 3 can be collected just above the filter plate 6, ensuring that the entering sewage can be filtered.

[0027] like Figure 1 and Figure 3As shown, the device also includes a blocking mechanism 4, which includes a ball valve 41 arranged inside the sewage pipe 2, a valve stem 42 is arranged at one end of the ball valve 41, a through hole is opened at one end of the sewage pipe 2 for the valve stem 42 to pass through, a sealing bearing is installed at the position of the through hole, and the valve stem 42 passes through the sealing bearing, which can prevent the sewage pipe from leaking and ensure the rotation of the valve stem 42; the blocking mechanism 4 also includes a motor 43, the motor 43 is fixedly connected to the sewage pipe 2 through a connecting plate 44, the connecting plate 44 in this example is a U-shaped structure, the connecting plate 44 defines a accommodating cavity and one end of its opening is connected to the sewage pipe 2; the motor 43 is arranged outside the accommodating cavity and is fixedly connected to the connecting plate 44, the rotating shaft of the motor 43 is arranged inside the accommodating cavity, and the rotating shaft of the motor 43 is fixedly connected to the valve stem 42; start the motor 43, the rotating shaft of the motor 43 rotates to drive the valve stem 42 to rotate, and the ball valve 41 can be opened or closed.

[0028] In some embodiments, the device includes multiple sewage discharge mechanisms 5.

[0029] In some embodiments, the sewage discharge mechanism 5 includes a sewage discharge pipe 51 , which is disposed below the ball valve 41 . The sewage discharge pipe 51 defines a first channel 511 that is connected to the sewage discharge pipe 2 . The sewage discharge pipe 51 also defines a second channel 512 .

[0030] In some embodiments, the sewage discharge mechanism 5 also includes a blocking ball 52 and a spring 54 arranged inside the sewage discharge pipe 51, one end of the blocking ball 52 abuts against the first channel 511, and the other end of the blocking ball 52 is installed with a baffle 53; one end of the spring 54 is connected to the baffle 53; the other end of the spring 54 is connected to the bottom of the sewage discharge pipe 51.

[0031] In some embodiments, the cross-sections of the impurity exhaust pipe 51 and the baffle 53 are square.

[0032] like Figure 2 and Figure 3As shown, the device also includes a plurality of sewage discharge mechanisms 5, which in this example include two sewage discharge mechanisms 5 symmetrically arranged on the left and right. The sewage discharge mechanism 5 includes a sewage discharge pipe 51, which is arranged on the outside of the sewage discharge pipe 2 and is fixedly connected to the sewage discharge pipe 2. The sewage discharge pipe 51 is arranged at an angle to the upper plate 31 of the filter shell 3, so that the liquid flowing upward from the filter shell 3 can enter the sewage discharge pipe 51 and be discharged; the sewage discharge pipe 51 is provided with a first channel 511 connected to the sewage discharge pipe 2, and a second channel 512 is provided on the side wall of the sewage discharge pipe 51 and on the lower side of the first channel 511, so that the liquid and impurities entering the sewage discharge pipe 51 can be discharged from the second channel 512; the sewage discharge mechanism 5 also includes a blocking ball 52 arranged inside the sewage discharge pipe 51, and one end of the blocking ball 52 is provided with A baffle 53 is provided, and a spring 54 is provided on the other side of the baffle 53, and the other end of the spring 54 is connected to the bottom plate 514 of the drainage pipe 51; under the action of the spring 54, one side of the blocking ball 52 abuts against the first channel 511 so as to block the first channel 511; a convex portion 513 is provided inside the drainage pipe 51, and the first channel 511 connects the drainage pipe 51 and the sewage pipe 2 through the convex portion 513, and the end of the convex portion 513 abutting against the blocking ball 52 is complementary to the surface shape of the blocking ball 52, so as to ensure that the blocking ball 52 can tightly block the first channel 511; in this example, the cross-sections of the drainage pipe 51 and the baffle 53 are square, so that the baffle 53 cannot rotate inside the drainage pipe 51, so as to ensure that the baffle 53 can stably slide along the drainage pipe 51.

[0033] In some embodiments, the cleaning mechanism 7 includes a water pump 71 and a water spray shell 73 arranged at the bottom of the filter shell 3 . A connecting pipe 72 is arranged at the water outlet of the water pump 71 , and the other end of the connecting pipe 72 is connected to the water spray shell 73 .

[0034] In some embodiments, the water spray shell 73 is disposed directly below the filter plate 6 .

[0035] like Figure 2 As shown, the cleaning mechanism 7 includes a water pump 71, which is arranged inside the filter shell 3. Specifically, the water pump 71 is installed in a box body 74, and the water outlet and water inlet of the water pump 71 are arranged outside the box body 74 and placed inside the filter shell 3, so as to extract water from the bottom of the filter shell 3; the water outlet of the water pump 71 is connected to the water spray shell 73 through a connecting pipe 72, a bearing is arranged at the lower left end of the water spray shell 73, and the connecting pipe 72 is connected to the bearing of the water spray shell 73, so that the water spray shell 73 can rotate around the connecting pipe 72; the water spray shell 73 has a cavity structure, and the connecting pipe 72 is connected to the water spray shell 73, so that the water pumped out by the water pump 71 enters the water spray shell 73; the upper end of the water spray shell 73 is open and faces the filter plate 6, so that the water sprayed upward by the water spray shell 73 can backwash the filter plate 6.

[0036] A rotating rod 11 is provided at the other end of the water spray shell 73 opposite to the connecting pipe 72. The rotating rod 11 is horizontally arranged and fixedly connected to the water spray shell 73. The device of the present application also includes a second motor 10, which is arranged outside the filter shell 3 and connected to the right plate of the filter shell 3. The axis of the rotating shaft of the second motor 10 and the axis of the rotating rod 11 are arranged in the same horizontal direction so that the rotating shaft of the second motor 10 is fixedly connected to the rotating rod 11. The right plate 33 of the filter shell 3 is provided with a through hole for the rotating rod 11 to pass through. A sealed bearing is arranged at the filter housing 3 to prevent water leakage; when the second motor 10 is started, the rotating rod 11 is driven to rotate, and the rotating rod 11 drives the water spray housing 73 to rotate; in actual operation, the sewage in the boiler body 1 enters the filter housing 3 through the sewage pipe 2, and the sewage is filtered by the filter plate 6 in the upper part of the filter housing 3 and enters the lower part of the filter housing 3, and first enters the water spray housing 73. When the water in the water spray housing 73 is full of water, the second motor 10 is started to rotate the water spray housing 73 to pour water into the lower part of the filter housing 3.

[0037] like Figure 2 and Figure 4 As shown, the interior of the filter shell 3 is also provided with a water outlet component 9, the water outlet component 9 includes a water outlet pipe 91, in this example, the cross-section of the water outlet pipe 91 is square, the right plate 33 of the filter shell 3 is provided with a through hole for the water outlet pipe 91 to pass through, the water outlet pipe 91 is horizontally arranged through the through hole, and a sealing ring is provided between the water outlet pipe 91 and the right plate 33 of the filter shell 3, so as to seal the through hole and prevent the filter shell 3 from leaking; the upper end of the water outlet pipe 91 is provided with a water outlet 911, the water outlet 911 and the filter plate 6 are symmetrically arranged with the rotating rod 11 as the axis, so that the water passing through the filter plate 6 can enter the water outlet pipe 91 and be discharged; the water outlet component 9 also includes a blocking plate 92, and the blocking plate 92 is arranged at the position of the water outlet 911 to cover the water outlet 911; at least two vertically arranged sliding rods 94 are also provided inside the water outlet pipe 91, one of which is arranged on the left side of the water outlet 911, and the other is arranged on the right side of the water outlet 911. 4 is arranged on the right side of the water outlet 911, and the two slide bars 94 are arranged symmetrically about the center line of the water outlet 911; the lower end of the blocking plate 92 is also provided with a slide plate 93 connected thereto, the slide plate 93 is arranged inside the water outlet pipe 91 and below the water outlet 911, and a through hole for the slide bar 94 to pass through is respectively opened near the left and right ends of the slide plate 93, and the slide plate 93 is sleeved on the outer ring of the slide bar 94 and can move up and down along the slide bar 94; the outer rings of the two slide bars 94 are also sleeved with springs 95, the lower ends of the springs 95 are fixedly connected to the lower plate of the water outlet pipe 91, and the upper ends of the springs 95 are fixedly connected to the lower ends of the slide plates 93; when the water passing through the filter plate 6 or the water spray shell 73 rotates to pour out the water inside, the blocking plate 92 is pressed downward under the action of the gravity of the water, so that the water outlet pipe 91 is connected, and the filtered water can be discharged through the water outlet pipe 91, which is convenient for subsequent treatment or recycling.

[0038] In some embodiments, the limiting mechanism 8 includes a left side plate 81 and a right side plate 82; the left side plate 81 and the right side plate 82 are connected to the filter shell 3, and an upper screw rod 83 and a lower screw rod 84 are arranged between the left side plate 81 and the right side plate 82; the upper screw rod 83 and the lower screw rod 84 are sleeved with a left connecting plate 85 and a right connecting plate 86.

[0039] In some embodiments, the left connecting plate 85 and the right connecting plate 86 are L-shaped structures.

[0040] like Figure 1 and Figure 5 As shown, a limiting mechanism 8 is also provided at the front end of the filter shell 3. Specifically, the filter shell 3 includes a front plate 32, and a strip slot is provided at a position opposite to the filter plate 6, through which the filter plate 6 can be installed or replaced; a limiting mechanism 8 is installed at a position opposite to the strip slot of the front plate 32. In this example, the limiting mechanism 8 includes a left plate 81 and a right plate 82. The left plate 81 and the right plate 82 are symmetrically arranged about the center line of the vertical direction of the strip slot, and the left plate 81 and the right plate 82 are fixedly connected to the front plate 32 respectively; the limiting mechanism 8 also includes an upper screw rod 83 and a lower screw rod 84. The upper screw rod 83 is arranged at a position above the strip slot, and the lower screw rod 84 is arranged at a position below the strip slot. In this example, the upper screw rod 83 and the lower screw rod 84 are symmetrically arranged about the center line of the horizontal direction of the strip slot; the left ends of the upper screw rod 83 and the lower screw rod 84 are movably connected to the left plate 81, and the right ends of the upper screw rod 83 and the lower screw rod 84 are movably connected to the left plate 81. It is movably connected to the right side plate 82; in this example, the left side plate 81 and the right side plate 82 are provided with through holes corresponding to the upper screw rod 83 and the lower screw rod 84, and bearings are provided at the through holes; a connecting shaft is provided at each of the upper and lower through holes of the left side plate 81, and the right ends of the two connecting shafts extend out of the left side plate 81 and are fixedly connected to the left ends of the upper screw rod 83 and the lower screw rod 84, and the two connecting shafts extend out of a part of the left side plate 81 to the left, and a pulley 87 is provided at the left end of the two connecting shafts, and a belt 88 is wound around the upper and lower pulleys 87; the right side plate 82 is provided with through holes corresponding to the upper screw rod 83 and the lower screw rod 84, and bearings are provided at the through holes, and the right end of the upper screw rod 83 is connected to the bearing at the upper end of the right side plate 82, and a handle 89 is also provided on the right side of the right side plate 82 and at the through hole near the lower end, and the connecting rod of the handle 89 passes through the through hole near the lower end of the right side plate 82 and is fixedly connected to the lower screw rod 84, so when the handle 89 is turned, the lower screw rod 84 can be driven to rotate.

[0041] like Figure 5As shown, the limiting mechanism 8 also includes a left connecting plate 85 and a right connecting plate 86, which are arranged between the left side plate 81 and the right side plate 82, and through holes are respectively opened at positions near the upper and lower ends of the left connecting plate 85 and the right connecting plate 86, and internal threads are arranged in the through holes to be threadedly connected with the upper screw rod 83 and the lower screw rod 84. The through hole near the upper end of the left connecting plate 85 is connected with the upper screw rod 83, and the through hole near the lower end of the left connecting plate 85 is connected with the lower screw rod 84, and the left connecting plate 85 is arranged at the part near the left side plate 81; the through hole near the upper end of the right connecting plate 86 is connected with the upper screw rod 83, and the through hole near the lower end of the right connecting plate 86 is connected with the lower screw rod 84, and the right connecting plate 86 is arranged at the part near the right side plate 82; the upper screw rod 83 includes two screw rods with opposite thread directions welded together, and the lower screw rod 84 also includes two screw rods with opposite thread directions welded together, and the screw rod threads on the left sides of the upper screw rod 83 and the lower screw rod 84 The screw threads on the right sides of the upper screw rod 83 and the lower screw rod 84 are in opposite directions; therefore, when the handle 89 is turned to rotate the lower screw rod 84, the lower screw rod 84 drives the belt 88 to rotate the upper screw rod 83, and the left connecting plate 85 and the right connecting plate 86 sleeved on the upper screw rod 83 and the lower screw rod 84 move away from each other or approach each other; when the left connecting plate 85 and the right connecting plate 86 approach each other, the filter plate 6 can be limited to prevent the filter plate 6 from falling out. When 86 move away from each other, the limit on the filter plate 6 can be released, and the staff can take out or replace the filter plate 6 through the strip-shaped slot. A mounting plate 61 is set at a position close to the front plate 32 of the filter plate 6, and the mounting plate 61 is used to install and fix the filter plate 6; the left connecting plate 85 and the right connecting plate 86 in this example are L-shaped structures, wherein one side of the L-shaped plate has a hole connected to the upper screw rod 83 and the lower screw rod 84, and the other side is set on a side close to the front plate 32, which is convenient for limiting the filter plate 6.

[0042] When the filter plate 6 needs to be cleaned in actual work, the first motor 43 is started to rotate the ball valve 41 to close the sewage pipe 2, so that the opening of the water spray shell 73 is facing the filter plate 6 upward, and then the water pump 71 is started to draw water from the lower half of the filter shell 3 into the water spray shell 73, and the water spray shell 73 sprays water upward to backwash the filter plate 6. The water pressure of the backwashing flushes the blocking ball 52, so that the sewage flushing the filter plate 6 is discharged from the second channel 512. This flushing method does not require the blocked filter plate 6 to be disassembled, and the operation is convenient; when the filter plate 6 needs to be replaced, the handle 89 is rotated to drive the upper screw rod 83 and the lower screw rod 84 to rotate, so that the left connecting plate 85 and the right connecting plate 86 move to both sides to release the limit of the filter plate 6, that is, the filter plate 6 can be extracted from the filter shell 3, so that the damaged filter plate 6 can be quickly and conveniently replaced. The sewage discharge device for boilers of the present application can backwash the filter plate 6, is easy to operate, and the method of replacing the filter plate 6 is also convenient, which improves the use efficiency of the device.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "fixation" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the present utility model, 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.

[0046] 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 utility model. 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.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A sewage discharge device for a power plant boiler, characterized in that: The device comprises: Boiler body (1); A sewage pipe (2), one end of which is connected to the boiler body (1); A filter shell (3), the filter shell (3) being a box structure with an inner cavity, the filter shell (3) being connected to the other end of the sewage discharge pipe (2); A blocking mechanism (4), the blocking mechanism (4) being connected to the sewage discharge pipe (2); A sewage discharge mechanism (5), the sewage discharge mechanism (5) being arranged below the blocking mechanism (4) and connected to the sewage discharge pipe (2); A filter plate (6), wherein the filter plate (6) is arranged inside the filter housing (3); a cleaning mechanism (7), the cleaning mechanism (7) being arranged inside the filter housing (3) and below the filter plate (6); and A limiting mechanism (8); the limiting mechanism (8) is connected to the filter housing (3).

2. The sewage discharge device for a power plant boiler according to claim 1, characterized in that: The blocking mechanism (4) comprises a ball valve (41), and the ball valve (41) is arranged inside the sewage discharge pipe (2).

3. The sewage discharge device for a power plant boiler according to claim 1, characterized in that: The device comprises at least two sewage discharge mechanisms (5).

4. The sewage discharge device for a power plant boiler according to claim 2, characterized in that: The sewage discharge mechanism (5) comprises a sewage discharge pipe (51), which is arranged below the ball valve (41). The sewage discharge pipe (51) has a first channel (511) connected to the sewage discharge pipe (2); the sewage discharge pipe (51) also has a second channel (512).

5. The sewage discharge device for a power plant boiler according to claim 4, characterized in that: The sewage discharge mechanism (5) further comprises a blocking ball (52) and a spring (54) arranged inside the sewage discharge pipe (51); one end of the blocking ball (52) abuts against the first channel (511), and the other end of the blocking ball (52) is mounted with a baffle (53); one end of the spring (54) is connected to the baffle (53); and the other end of the spring (54) is connected to the bottom of the sewage discharge pipe (51).

6. The sewage discharge device for a power plant boiler according to claim 5, characterized in that: The cross-sections of the impurity discharge pipe (51) and the baffle (53) are square.

7. The sewage discharge device for a power plant boiler according to claim 1, characterized in that: The cleaning mechanism (7) comprises a water pump (71) and a water spray shell (73) arranged at the bottom of the filter shell (3); a connecting pipe (72) is arranged at the water outlet of the water pump (71); the other end of the connecting pipe (72) is connected to the water spray shell (73).

8. The sewage discharge device for a power plant boiler according to claim 7, characterized in that: The water spray shell (73) is arranged directly below the filter plate (6).

9. The sewage discharge device for a power plant boiler according to claim 1, characterized in that: The limiting mechanism (8) comprises a left side plate (81) and a right side plate (82); the left side plate (81) and the right side plate (82) are connected to the filter housing (3); an upper screw rod (83) and a lower screw rod (84) are arranged between the left side plate (81) and the right side plate (82); the upper screw rod (83) and the lower screw rod (84) are sleeved with a left connecting plate (85) and a right connecting plate (86).

10. The sewage discharge device for a power plant boiler according to claim 9, characterized in that: The left connecting plate (85) and the right connecting plate (86) are L-shaped structures.

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