A boiler wastewater enthalpy increase steam purification and recovery device

Abstract

The present invention discloses a boiler wastewater enthalpy increase steam purification and recovery device, the technical solution of which includes a cylinder, a steam inlet hole, a steam outlet hole and a sewage discharge hole are arranged on the side wall of the cylinder, a primary purification component and a secondary purification component are arranged in the cylinder, and the primary purification component is located below the secondary purification component; the primary purification component includes a cyclone separation tube and a separation tube fixing plate, the separation tube fixing plate is used to fix the cyclone separation tube, and an annular separation channel is arranged in the cyclone separation tube, and the unpurified high-temperature steam generates centrifugal force during the process of passing through the annular separation channel, thereby throwing impurities out of the high-temperature steam for separation; the secondary purification component includes a filter element tube and a filter element fixing plate, the filter element fixing plate is used to fix the filter element tube, the filter element tube has an opening at the upper end and a closed lower end, and the filter element tube is used to prevent impurities in the high-temperature steam from entering the upper chamber. The device can purify the wastewater, and has high purification efficiency and good purification effect.

Description

Technical Field

[0001] The invention relates to the field of high-temperature steam purification, and more specifically to a boiler wastewater enthalpy increase steam purification and recovery device. Background Art

[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The hot water or steam produced in the boiler can directly provide the required thermal energy for industrial production and people's lives, or it can be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator. A boiler that provides hot water is called a hot water boiler, which is mainly used for life and also has a small number of applications in industrial production. A boiler that produces steam is called a steam boiler, often referred to as a boiler, and is mostly used in thermal power plants, ships, locomotives and industrial and mining enterprises.

[0003] In order to control the quality of boiler steam, the boiler is designed with continuous blowdown (also known as surface blowdown), that is, the boiler continuously discharges part of the boiler water from the part with the highest salt and alkali concentration in the boiler water to reduce the salt content, alkali content and suspended slag content in the boiler water. The purpose is to ensure the quality of boiler water so that the boiler can operate safely and stably for a long time, and the heat loss of this blowdown is also one of the important factors affecting the thermal efficiency of the boiler.

[0004] Boiler wastewater is high-temperature wastewater, which contains impurities such as phosphates. In order to recycle the heat in the high-temperature wastewater, the high-temperature wastewater can be sprayed into the high-temperature steam to make the high-temperature wastewater vaporize instantly (that is, the boiler wastewater recovery atomization system), and then the mixed steam after vaporization is purified to remove impurities, and finally pure high-temperature steam is obtained. By utilizing the pure high-temperature steam, the heat of the original high-temperature wastewater can be recycled (that is, the steam purification system after the recovered boiler wastewater is mixed with steam). The flow chart of the boiler wastewater recovery system is as follows Figure 7 shown.

[0005] Purification and recovery of mixed high-temperature steam is an important part of the boiler wastewater recovery system. Currently, there is a lack of devices on the market that can efficiently purify high-temperature steam mixed with impurities such as phosphates. Summary of the invention

[0006] In view of the deficiencies in the prior art, the object of the present invention is to provide a boiler wastewater enthalpy increase steam purification and recovery device, which can purify high-temperature steam mixed with impurities and has high purification efficiency and good purification effect.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a boiler wastewater enthalpy increase steam purification and recovery device, comprising a cylinder, a steam inlet hole, a steam outlet hole and a sewage discharge hole are arranged on the side wall of the cylinder, a primary purification component and a secondary purification component are arranged in the cylinder, and the primary purification component is located below the secondary purification component;

[0008] The primary purification component includes a cyclone separation tube and a separation tube fixing plate, wherein the separation tube fixing plate is used to fix the cyclone separation tube and divide the interior of the cylinder into an upper chamber and a lower chamber connected by the cyclone separation tube, and an annular separation channel is arranged in the cyclone separation tube. When the unpurified high-temperature steam passes through the annular separation channel, centrifugal force is generated to throw impurities out of the high-temperature steam for separation;

[0009] The secondary purification component includes a filter tube and a filter fixing plate, the filter fixing plate is used to fix the filter tube and divide the upper chamber into an upper chamber and a lower chamber connected by the filter tube, the filter tube has an upper end open and a lower end closed, and the filter tube is used to prevent impurities in the high-temperature steam from entering the upper chamber;

[0010] The steam inlet is located in the lower chamber, and the steam outlet is located in the upper chamber. Unpurified high-temperature steam enters from the steam inlet and is purified by the cyclone separation tube and the filter tube in sequence, and is discharged from the steam outlet.

[0011] As a further improvement of the present invention, the cyclone separation tube includes an inner tube and an outer tube, the upper end of the inner tube is connected to the separation tube fixing plate, the lower end of the inner tube is inserted into the outer tube, the annular separation channel is formed between the outer tube and the inner tube, the upper end of the outer tube is connected to the side wall of the inner tube so that the top of the annular separation channel is closed, and a steam inlet channel is provided on the side wall of the outer tube, the steam inlet channel is connected to the annular separation channel and is tangent to the annular separation channel, after the unpurified high-temperature steam is centrifugally separated through the annular separation channel, the impurities are discharged from the lower end of the outer tube under the action of gravity, and the steam moves from the lower end of the inner tube to the top of the inner tube under the action of buoyancy.

[0012] With such an arrangement, unpurified high-temperature steam enters the cyclone separation tube through the steam inlet channel. When the high-temperature steam moves in the annular separation channel, the impurities in the high-temperature steam are thrown close to the inner wall of the outer tube under the action of centrifugal force. Since the upper part of the annular separation channel is closed, the separated steam eventually bypasses the lower end of the inner tube and leaves from the upper end of the inner tube, while the impurities are discharged from the lower end of the outer tube under the action of gravity. This structure realizes the primary separation of high-temperature steam mixed with impurities through centrifugal force, and has an ingenious structure and strong practicality.

[0013] As a further improvement of the present invention, a plurality of steam inlet channels are provided, and the plurality of steam inlet channels are evenly distributed in a ring shape along the central axis of the outer tube.

[0014] This arrangement is helpful to improve the high-temperature steam intake efficiency, thereby improving the high-temperature steam purification efficiency.

[0015] As a further improvement of the present invention, a plurality of cyclone separation tubes are provided.

[0016] Through such an arrangement, a plurality of cyclone separation tubes work simultaneously, which is beneficial to improving the primary purification efficiency of the unpurified high-temperature steam.

[0017] As a further improvement of the present invention, the primary purification component also includes a drain pipe, which is connected to the cyclone separation pipe and extends outward through the drain hole. A valve is provided on the drain pipe, and impurities separated in the cyclone separation pipe are discharged outside the cylinder through the drain pipe.

[0018] By such arrangement, when it is necessary to discharge the impurities separated in the cyclone separation tube, the valve is opened so that the impurities are discharged through the sewage pipe under the action of the pressure difference between the inside and outside of the cylinder.

[0019] As a further improvement of the present invention, a plurality of sewage pipes are provided, each of the cyclone separation pipes is communicated with one sewage pipe, and each of the sewage pipes is communicated with at least one cyclone separation pipe.

[0020] By such an arrangement, the number of sewage pipes can be reduced as much as possible on the basis of achieving the discharge of impurities, which is conducive to saving production costs.

[0021] As a further improvement of the present invention, the sewage pipe is arranged obliquely, and one end of the sewage pipe located inside the cylinder is higher than the other end of the sewage pipe located outside the cylinder.

[0022] This arrangement helps to reduce the difficulty of discharging impurities when the valve on the sewage pipe is opened, thereby improving the efficiency of discharging impurities.

[0023] As a further improvement of the present invention, a filter element positioning plate is also fixed in the cylinder body, the filter element positioning plate is located in the lower chamber, the filter element positioning plate is used to position the lower end of the filter element tube, and the filter element positioning plate is provided with a plurality of through holes for high-temperature steam to pass through.

[0024] By such an arrangement, the filter element is further fixed and positioned to prevent the filter element tube from shaking, and the through hole is arranged to allow high-temperature steam to pass through.

[0025] As a further improvement of the present invention, an annular boss is provided on the upper end of the outer surface of the filter element tube, and the filter element tube is clamped on the filter element fixing plate through the annular boss. The filter element fixing plate is also threaded with a plurality of threaded pressure pieces, and the threaded pressure pieces include a circular pressure plate. When the threaded pressure pieces are tightened, the annular boss is pressed against the filter element fixing plate through the circular pressure plate.

[0026] Through such an arrangement, the threaded connection is simple, convenient and detachable, and the filter tube is firmly installed by pressing the annular boss with a circular pressure plate, avoiding the need to provide a through hole on the annular boss, which helps to reduce the difficulty of processing the filter tube.

[0027] As a further improvement of the present invention, a cleaning hole and a drainage hole are also provided on the cylinder, the cleaning hole is located in the upper chamber, the drainage hole is located in the lower chamber, the cleaning hole is used for the cleaning liquid to enter, and the drainage hole is used for discharging the cleaning liquid.

[0028] By such arrangement, the primary purification component and the secondary purification component can be cleaned by introducing the cleaning liquid into the cleaning hole, and the cleaning liquid after cleaning is discharged from the drain hole.

[0029] Beneficial effects of the present invention: Through the arrangement of the primary purification component and the secondary purification component, the purification of high-temperature steam mixed with impurities is achieved. The high-temperature steam mixed with impurities enters from the steam inlet, is centrifugally separated by the primary purification component, and purified by the secondary purification component in turn, and is discharged from the steam outlet, with high purification efficiency. The arrangement of combining primary purification with secondary purification is conducive to improving the purification effect of the high-temperature steam mixed with impurities of the device. Primary purification by the primary purification component before filtering the filter tube can reduce the content of impurities during filtering of the filter tube, which is conducive to improving the service life of the filter tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 for Figure 1 Sectional view in the AA direction;

[0032] Figure 3 for Figure 1 Cross-sectional view in the BB direction;

[0033] Figure 4 A top view of the present invention;

[0034] Figure 5 It is a schematic diagram of the structure of a cyclone separation tube;

[0035] Figure 6 is a cross-sectional view of a cyclone separation tube;

[0036] Figure 7 This is the flow chart of the boiler blowdown wastewater recovery system.

[0037] Figure numerals: 1, cylinder; 11, steam inlet; 12, steam outlet; 13, upper chamber; 131, upper sub-chamber; 132, lower sub-chamber; 14, lower chamber; 15, filter element positioning plate; 16, cleaning hole; 17, drain hole; 2, primary purification component; 21, cyclone separation tube; 211, annular separation channel; 212, inner tube; 213, outer tube; 214, steam inlet channel; 22, separation tube fixing plate; 23, drain pipe; 3, secondary purification component; 31, filter element tube; 311, annular boss; 32, filter element fixing plate; 33, screw-on pressure piece; 331, circular pressure plate. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0039] Reference Figure 1 As shown, a boiler wastewater enthalpy increase steam purification and recovery device of this embodiment includes a cylinder 1, which is placed vertically and supported by a support at the lower end. A steam inlet 11, a steam outlet 12 and a sewage outlet are arranged on the side wall of the cylinder 1, and a primary purification component 2 and a secondary purification component 3 are arranged in the cylinder 1, and the primary purification component 2 is located below the secondary purification component 3. After entering from the steam inlet 11, the unpurified high-temperature steam is purified in turn through the cyclone separation tube 21 and the filter element tube 31, and is discharged from the steam outlet 12.

[0040] Reference Figure 1 , Figure 3 , Figure 5 , Figure 6As shown, the primary purification component 2 includes a plurality of cyclone separation tubes 21, a separation tube fixing plate 22 and a plurality of sewage pipes 23. The cyclone separation tube 21 includes an inner tube 212 and an outer tube 213. The upper end of the inner tube 212 is connected to the separation tube fixing plate 22, and the lower end of the inner tube 212 is inserted into the outer tube 213. The length of the inner tube 212 inserted from the top of the outer tube 213 into the outer tube 213 is preferably one third to two thirds of the total length of the outer tube 213. An annular separation channel 211 is formed between the outer tube 213 and the inner tube 212. The upper end of the outer tube 213 is connected to the side wall of the inner tube 212 so that the upper part of the annular separation channel 211 is closed. A steam inlet channel 214 is provided on the side wall of the outer tube 213. The steam inlet channel 214 is connected to the annular separation channel 211 and is tangent to the annular separation channel 211. There are several steam inlet channels 214, which are evenly distributed in annular shape along the central axis of the outer tube 213. The number of steam inlet channels is preferably 2. Unpurified high-temperature steam enters the cyclone separation tube 21 through the steam inlet channel 214. When the high-temperature steam moves in the annular separation channel 211, the impurities in the high-temperature steam are thrown close to the inner wall of the outer tube 213 under the action of centrifugal force. Since the upper part of the annular separation channel 211 is closed, the separated steam eventually bypasses the lower end of the inner tube 212 and leaves from the upper end of the inner tube 212, while the impurities are discharged from the lower end of the outer tube 213 under the action of gravity.

[0041] Reference Figure 1 As shown, the separation tube fixing plate 22 is used to fix the cyclone separation tube 21 and divide the interior of the cylinder 1 into an upper chamber 13 and a lower chamber 14 which are connected through the cyclone separation tube 21 .

[0042] Reference Figure 1 , Figure 3 As shown, the drain pipe 23 is connected to the lower end of the outer tube 213 of the cyclone separation tube 21, each cyclone separation tube 21 is connected to a drain pipe 23, and each drain pipe 23 is connected to at least one cyclone separation tube 21. The drain pipe 23 extends outward through the drain hole, and the drain pipe 23 is tilted. The end of the drain pipe 23 located inside the cylinder 1 is higher than the end of the drain pipe 23 located outside the cylinder 1, and the tilt angle of the drain pipe 23 is 5°-30°. A valve is provided on the drain pipe 23, and the valve is preferably a solenoid valve to facilitate electric control of opening and closing. The impurities separated in the cyclone separation tube 21 are discharged to the outside of the cylinder 1 through the drain pipe 23.

[0043] Reference Figure 1 , Figure 2As shown, the secondary purification component 3 includes a filter element fixing plate 32 and a plurality of filter element tubes 31. The filter element fixing plate 32 is used to fix the filter element tube 31 and divide the upper chamber 13 into an upper chamber 131 and a lower chamber 132 connected through the filter element tube 31. The filter element tube 31 is made of amino composite nanomaterials and purchased from Zhongnengfa Ke Energy Saving and Environmental Protection (Beijing) Co., Ltd., model ZNFK-FHANMCL-01; the filter element tube 31 is open at the upper end and closed at the lower end. The filter element tube 31 is used to prevent impurities in the high-temperature steam from entering the upper chamber 131. When the high-temperature steam enters the filter element tube 31 through the outer wall of the filter element tube 31, the impurities are blocked outside the filter element tube 31. A filter element positioning plate 15 is also fixed in the cylinder 1. The filter element positioning plate 15 is located in the lower chamber 132. The filter element positioning plate 15 is fixed on the inner side of the cylinder 1. The filter element positioning plate 15 is provided with positioning holes, and the positioning holes are arranged one by one with the filter element tube 31. The positioning hole is equal to or slightly larger than the outer wall of the filter tube 31. The lower end of the filter tube 31 is hemispherical or conical, which is convenient for the lower end of the filter tube 31 to be inserted into the positioning hole. The filter positioning plate 15 is used to position the lower end of the filter tube 31. The filter positioning plate 15 is provided with a plurality of through holes for high-temperature steam to pass through.

[0044] Reference Figure 2 As shown, the installation structure of the filter element tube 31 and the filter element fixing plate 32 is as follows: an annular boss 311 is provided on the upper end of the outer surface of the filter element tube 31, and the filter element tube 31 is clamped on the filter element fixing plate 32 through the annular boss 311. The filter element fixing plate 32 is also screwed with a plurality of screw-connected pressing pieces 33, and the screw-connected pressing pieces 33 include a circular pressing plate 331. When the screw-connected pressing pieces 33 are tightened, the annular boss 311 is pressed against the filter element fixing plate 32 through the circular pressing plate 331. The spiral pressing piece adopts a locking bolt or a thick gasket. When the locking bolt is tightened, the thick gasket presses the annular boss 311. The spiral pressing piece can be located between each filter element. When a spiral pressing piece is tightened, the circular pressing plate 331 presses multiple annular bosses 311, so that multiple filter elements can be fixed at the same time. The mounting and fixing structure of the inner tube 212 of the cyclone separation tube 21 and the separation tube fixing plate 22 may also adopt the same structure as the mounting structure of the filter element tube 31 and the filter element fixing plate 32 .

[0045] Reference Figure 1 , Figure 4As shown, the steam inlet 11 is located in the lower chamber 14, and the steam outlet 12 is located in the upper chamber 131. The cylinder 1 is also provided with a cleaning hole 16 and a drain hole 17. The cleaning hole 16 is located in the upper chamber 131, and the drain hole 17 is located in the lower chamber 14. The position of the drain hole 17 is preferably the center of the lower end of the cylinder 1. The cleaning hole 16 is used for the entry of cleaning liquid, and the cleaning liquid is preferably water. The drain hole 17 is used to discharge the cleaning liquid. The upper end of the cylinder 1 is also provided with a manhole for later maintenance. The side wall of the cylinder 1 is also provided with a pressure gauge port and a temperature gauge port. The pressure gauge and the temperature gauge can be set to detect the air pressure and temperature in the cylinder 1.

[0046] Working principle:

[0047] The high-temperature steam mixed with impurities enters the cylinder 1 through the steam inlet hole 11, and enters the annular separation channel 211 of the cyclone separation tube 21 through each steam inlet channel 214. After centrifugal separation, the impurities enter the drain pipe 23 through the lower end of the outer tube 213 under the action of gravity. The high-temperature steam after primary filtration bypasses the lower end of the inner tube 212 and moves upward through the internal channel of the inner tube 212. The high-temperature steam after primary filtration is filtered through the filter tube 31 in the secondary purification component 3 and purified into pure high-temperature steam, and the pure high-temperature steam is discharged from the steam outlet 12. When it is necessary to discharge the impurities in the drain pipe 23, open the valve, and the impurities are discharged from the drain pipe 23 under the action of the pressure difference between the inside and outside of the cylinder 1. When it is necessary to clean the primary purification component 2 and the secondary purification component 3, the cleaning liquid can be introduced from the cleaning hole 16, and the cleaning liquid is discharged from the drain hole 17 after cleaning.

[0048] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A boiler wastewater enthalpy increase steam purification and recovery device, comprising a cylinder (1), wherein a steam inlet (11), a steam outlet (12) and a sewage discharge hole are arranged on the side wall of the cylinder (1), characterized in that: A primary purification component (2) and a secondary purification component (3) are arranged in the cylinder (1), and the primary purification component (2) is located below the secondary purification component (3); The primary purification component (2) comprises a cyclone separation tube (21) and a separation tube fixing plate (22), wherein the separation tube fixing plate (22) is used to fix the cyclone separation tube (21) and divide the interior of the cylinder (1) into an upper chamber (13) and a lower chamber (14) which are connected through the cyclone separation tube (21), and an annular separation channel (211) is arranged in the cyclone separation tube (21), and centrifugal force is generated when the unpurified high-temperature steam passes through the annular separation channel (211), thereby throwing impurities out of the high-temperature steam for separation; The secondary purification component (3) comprises a filter element tube (31) and a filter element fixing plate (32), wherein the filter element fixing plate (32) is used to fix the filter element tube (31) and divide the upper chamber (13) into an upper chamber (131) and a lower chamber (132) connected through the filter element tube (31), the filter element tube (31) has an open upper end and a closed lower end, and the filter element tube (31) is used to prevent impurities in the high-temperature steam from entering the upper chamber (131); The steam inlet (11) is located in the lower chamber (14), and the steam outlet (12) is located in the upper chamber (131); unpurified high-temperature steam enters through the steam inlet (11), is purified by passing through the cyclone separation tube (21) and the filter tube (31) in sequence, and is discharged from the steam outlet (12); The cyclone separation tube (21) comprises an inner tube (212) and an outer tube (213); the upper end of the inner tube (212) is connected to the separation tube fixing plate (22); the lower end of the inner tube (212) is inserted into the outer tube (213); the annular separation channel (211) is formed between the outer tube (213) and the inner tube (212); the upper end of the outer tube (213) is connected to the side wall of the inner tube (212) so that the upper part of the annular separation channel (211) is closed; the side wall of the outer tube (213) is provided with a steam inlet channel (214); the steam inlet channel (214) is connected to the annular separation channel (211); The filter element (31) is connected to the separation channel (211) and is tangent to the annular separation channel (211). After the unpurified high-temperature steam is centrifugally separated through the annular separation channel (211), impurities are discharged from the lower end of the outer tube (213) under the action of gravity, and the steam moves from the lower end of the inner tube (212) to the upper part of the inner tube (212) under the action of buoyancy; an annular boss (311) is provided at the upper end of the outer surface of the filter element tube (31), and the filter element tube (31) is clamped on the filter element fixing plate (32) through the annular boss (311), and a plurality of screw-connected pressing pieces (33) are also screwed on the filter element fixing plate (32).

2. A boiler wastewater enthalpy increase steam purification and recovery device according to claim 1, characterized in that: A plurality of steam inlet channels (214) are provided, and the plurality of steam inlet channels (214) are evenly distributed in an annular shape along the central axis of the outer tube (213).

3. A boiler wastewater enthalpy increase steam purification and recovery device according to claim 1, characterized in that: A plurality of cyclone separation tubes (21) are provided.

4. A boiler wastewater enthalpy increase steam purification and recovery device according to claim 3, characterized in that: The primary purification component (2) further comprises a sewage discharge pipe (23), the sewage discharge pipe (23) being in communication with the cyclone separation pipe (21) and extending outward through the sewage discharge hole, the sewage discharge pipe (23) being provided with a valve, and the impurities separated in the cyclone separation pipe (21) are discharged to the outside of the cylinder (1) through the sewage discharge pipe (23).

5. A boiler wastewater enthalpy increase steam purification and recovery device according to claim 4, characterized in that: A plurality of the sewage discharge pipes (23) are provided, each of the cyclone separation pipes (21) is communicated with a sewage discharge pipe (23), and each of the sewage discharge pipes (23) is communicated with at least one of the cyclone separation pipes (21).

6. A boiler wastewater enthalpy increase steam purification and recovery device according to any one of claims 4 or 5, characterized in that: The sewage discharge pipe (23) is arranged obliquely, and one end of the sewage discharge pipe (23) located inside the cylinder (1) is higher than the other end of the sewage discharge pipe (23) located outside the cylinder (1).

7. The boiler wastewater enthalpy increase steam purification and recovery device according to claim 1, characterized in that: A filter element positioning plate (15) is also fixed in the cylinder (1), the filter element positioning plate (15) is located in the lower chamber (132), the filter element positioning plate (15) is used to position the lower end of the filter element tube (31), and the filter element positioning plate (15) is provided with a plurality of through holes for high-temperature steam to pass through.

8. The boiler wastewater enthalpy increase steam purification and recovery device according to claim 1, characterized in that: The threaded pressure piece (33) comprises a circular pressure plate (331), and when the threaded pressure piece (33) is screwed on, the circular pressure plate (331) presses the annular boss (311) onto the filter element fixing plate (32).

9. The boiler wastewater enthalpy increase steam purification and recovery device according to claim 1, characterized in that: The cylinder (1) is also provided with a cleaning hole (16) and a drainage hole (17); the cleaning hole (16) is located in the upper chamber (131), and the drainage hole (17) is located in the lower chamber (14); the cleaning hole (16) is used for allowing cleaning liquid to enter, and the drainage hole (17) is used for discharging the cleaning liquid.

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