Pollution discharge flash tank

Abstract

The utility model discloses a blowdown flash tank, and particularly relates to the field of sewage treatment, the blowdown flash tank comprises a cylinder body and a top cover arranged at an opening at the top of the cylinder body, the top cover extends outwards to form a liquid discharge pipe, a filtering mechanism is arranged at the top of an inner cavity of the cylinder body, a mounting frame is arranged below the filtering mechanism, and the mounting frame is connected with the cylinder body. A transmission shaft is rotatably mounted in the center of the mounting frame and coaxially and fixedly sleeved with a clamping seat, the clamping seat is provided with a plurality of annularly and evenly distributed inserting grooves with upward openings, the opening of each inserting groove expands outwards, and the transmission shaft is sleeved with an impeller in an up-down sliding mode. The inner annular wall of the impeller is provided with inserting strips matched with the inserting grooves, the top of the impeller is fixedly connected with a plurality of connecting columns, the tops of the connecting columns are jointly connected with a floating ring, a liquid inlet pipe fixedly penetrates through the side wall of the barrel, and a liquid outlet of the liquid inlet pipe points to the impeller clamped into the clamping base. And a spiral blade is mounted at the bottom of the transmission shaft and is arranged in a blow-off pipe of the barrel.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment, and particularly relates to a blowdown expansion vessel. Background Art

[0002] A blowdown expansion vessel (also known as a blowdown expander or blowdown tank) plays a crucial role in industrial applications, especially in the fields involving steam and hot water systems. It is mainly used to treat the sewage of boilers or similar high-pressure equipment.

[0003] In order to recycle the sewage, some existing blowdown expansion vessels usually treat the sewage by filtration. However, after filtering the solid impurities, it is difficult to discharge most of the solid impurities in time, which easily causes the blowdown expansion vessel to be blocked and has a short continuous service life, and it needs to be repaired before it can be used continuously. Therefore, a new type of blowdown expansion vessel is needed. Summary of the Utility Model

[0004] To solve the above problems, the utility model discloses a blowdown expansion vessel.

[0005] To achieve the above object, the technical solution of the utility model is as follows:

[0006] A blowdown expansion vessel includes a cylinder body and a top cover installed at the opening on the top of the cylinder body. The top cover extends outward with a liquid discharge pipe. A filtering mechanism is installed at the top of the inner cavity of the cylinder body. An installation frame is arranged below the filtering mechanism. A transmission shaft is rotatably installed at the center of the installation frame. A clamping seat is coaxially and fixedly sleeved on the transmission shaft. The clamping seat is provided with a plurality of annularly and evenly distributed slots with openings upward, and the opening of each slot expands outward. An impeller is sleeved on the transmission shaft in a vertically sliding manner, and the inner annular wall of the impeller is provided with insertion strips adapted to the slots. The top of the impeller is fixedly connected with a plurality of connecting columns, and a floating ring is commonly connected to the tops of the plurality of connecting columns. A liquid inlet pipe is fixedly penetrated through the side wall of the cylinder body, and the liquid outlet of the liquid inlet pipe points to the impeller clamped in the clamping seat. A spiral blade is installed at the bottom of the transmission shaft, and the spiral blade is arranged in the blowdown pipe of the cylinder body.

[0007] As a preferred technical solution of the utility model, the filtering mechanism includes: an installation ring fixedly connected to the inner annular wall of the cylinder body, and a filter screen is rotatably clamped to the installation ring.

[0008] As a preferred technical solution of the utility model, the installation ring is provided with a plurality of annularly and evenly distributed rotating slots, and the edge of the filter screen is provided with protrusions adapted to the rotating slots.

[0009] As a preferred technical solution of the utility model, a fixing bolt is threadedly connected to the protrusion of each filter screen, and the fixing bolt slidably penetrates through the installation ring.

[0010] As a preferred technical solution of the utility model, a bearing is embedded in the center of the mounting frame, and the inner ring of the bearing is coaxially fixedly connected to the transmission shaft.

[0011] As a preferred technical solution of the utility model, a plurality of scrapers evenly distributed in an annular shape and fitting against the inner wall of the cylinder are arranged above the spiral blade, and each scraper is fixedly connected to the transmission shaft, and the scraper is arranged between the holder and the spiral blade.

[0012] The beneficial effects of the utility model are:

[0013] 1. During operation, after filtering for a period of time, the filtered solid impurities gather at the bottom of the cylinder. The sewage pipe is opened and the liquid discharge pipe is closed, so that the liquid level in the inner cavity of the cylinder drops, causing the floating ring to bring the impeller down, and the impeller and the holder are connected. Then the flow of the liquid inlet pipe is increased, so that the liquid sprayed from the liquid inlet pipe drives the impeller to rotate. When the impeller rotates, the impeller drives the holder and the transmission shaft to rotate together. At this time, the scraper scrapes off the solid impurities on the bottom inner wall of the cylinder, so that the solid impurities flow to the sewage pipe. At the same time, the spiral blade rotates to force the sludge in the sewage pipe to be discharged. Thanks to the intermittent sewage discharge design of the sewage expansion tank, most of the filtered solid impurities can be discharged in time, which improves the continuous service life;

[0014] 2. The filter screen of the filter mechanism can be replaced. After removing the top cover, the filter screen can be removed from the filter mechanism for replacement, which improves the maintainability of the sewage expansion tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0016] Figure 2 It is an overall cross-sectional view of an embodiment of the utility model;

[0017] Figure 3 It is a partial cross-sectional view of the holder, impeller, floating ring and connecting column of the embodiment of the utility model;

[0018] Figure 4 This is an exploded view of the filtering mechanism according to an embodiment of the present utility model.

[0019] List of Figure Symbols:

[0020] 1. Cylinder; 101. Drain pipe;

[0021] 2. Top cover; 201. Drain pipe;

[0022] 3. Liquid inlet pipe;

[0023] 4. Filter mechanism; 401. Mounting ring; 402. Filter screen; 403. Handrail; 404. Fixing bolt;

[0024] 5. Mounting frame; 6. Bearing; 7. Transmission shaft; 8. Clamping seat; 9. Impeller; 10. Floating ring; 11. Connecting column; 12. Scraper; 13. Helical blade. Detailed implementation manner

[0025] The following further clarifies the present utility model in conjunction with the accompanying drawings and specific implementation manners. It should be understood that the following specific implementation manners are only used to illustrate the present utility model and not to limit the scope of the present utility model.

[0026] Please refer to Figures 1-4 , a sewage flash tank, including a cylinder body 1 and a top cover 2 installed at the top opening of the cylinder body 1. The sewage treated by this sewage flash tank undergoes preliminary filtration to remove larger fixed impurities. The cylinder body 1 and the top cover 2 are fixedly connected by a plurality of bolts. The top cover 2 extends outward with a liquid discharge pipe 201. The liquid discharge pipe 201 is connected to an external pipeline through a flange, and a valve is provided between the liquid discharge pipe 201 and the external pipeline. A filtering mechanism 4 is installed at the top of the inner cavity of the cylinder body 1, and a mounting frame 5 is arranged below the filtering mechanism 4. A transmission shaft 7 is rotatably installed at the center of the mounting frame 5. A bearing 6 is embedded at the center of the mounting frame 5, and the inner ring of the bearing 6 is coaxially and fixedly connected to the transmission shaft 7. A clamping seat 8 is coaxially and fixedly sleeved on the transmission shaft 7. The clamping seat 8 is provided with a plurality of annularly and evenly distributed slots with upward openings, and the opening of each slot expands outward. An impeller 9 is slidably sleeved on the transmission shaft 7 up and down, and the inner annular wall of the impeller 9 is provided with insertion strips adapted to the slots. When the impeller 9 drops, the insertion strips of the impeller 9 will be stuck into the slots of the clamping seat 8, and the impeller 9 and the clamping seat 8 are inserted together. When the impeller 9 rotates, the impeller 9 drives the clamping seat 8 and the transmission shaft 7 to rotate together. A plurality of connecting columns 11 are fixedly connected to the top of the impeller 9, and a floating ring 10 is jointly connected to the tops of the plurality of connecting columns 11. A liquid inlet pipe 3 is fixedly penetrated through the side wall of the cylinder body 1, and the liquid outlet of the liquid inlet pipe 3 points to the impeller 9 stuck in the clamping seat 8. The liquid inlet pipe 3 is connected to an external pipeline through a flange, and a valve is provided between the liquid inlet pipe 3 and the external pipeline. A helical blade 13 is installed at the bottom of the transmission shaft 7, and the helical blade 13 is arranged in the sewage discharge pipe 101 of the cylinder body 1. The sewage discharge pipe 101 is connected to an external pipeline through a flange, and a valve is provided between the sewage discharge pipe 101 and the external pipeline. The diameter of the sewage discharge pipe 101 is much larger than that of the liquid inlet pipe 3. The floating ring 10 floats up and down with the liquid level in the inner cavity of the cylinder body 1, and the floating ring 10 drives the impeller 9 to move together, so that the impeller 9 and the clamping seat 8 are inserted or separated. When the impeller 9 and the clamping seat 8 are inserted together, the liquid outlet of the liquid inlet pipe 3 points to the blades of the impeller 9, and the liquid sprayed out of the liquid inlet pipe 3 pushes the impeller 9 to rotate.

[0027] The filtering mechanism 4 includes: a mounting ring 401 fixedly connected to the annular inner wall of the cylinder body 1, and a filter screen 402 is rotatably clamped to the mounting ring 401. The filter screen 402 can be replaced. The mounting ring 401 is provided with a number of annularly and evenly distributed rotating slots, and the edge of the filter screen 402 is provided with protrusions adapted to the rotating slots. A fixing bolt 404 is threadedly connected to each protrusion of the filter screen 402, and the fixing bolt 404 slidably penetrates through the mounting ring 401. Two handrails 403 are fixedly connected to the upper surface of the frame of the filter screen 402. When installing the filter screen 402, hold the handrails 403 and snap the protrusions on the edge of the filter screen 402 into the rotating slots of the mounting ring 401 and rotate, so that the protrusions of the filter screen 402 are misaligned with the openings of the rotating slots, and then use the fixing bolt 404 to pass through the mounting ring 401 and threadedly connect with the protrusions of the filter screen 402.

[0028] Above the spiral blade 13, a number of scraping plates 12 that are annularly and evenly distributed and fit the inner wall of the cylinder body 1 are provided, and each scraping plate 12 is fixedly connected to the transmission shaft 7. The scraping plates 12 are arranged between the clamping seat 8 and the spiral blade 13. The bottom of the cylinder body 1 is funnel-shaped, which is convenient for the filtered solid impurities to gather at the bottom of the cylinder body 1. When the transmission shaft 7 rotates, the scraping plates 12 scrape off the solid impurities on the inner wall of the bottom of the cylinder body 1, so that the solid impurities flow towards the sewage discharge pipe 101. At the same time, the spiral blade 13 rotates to forcibly discharge the sludge in the sewage discharge pipe 101.

[0029] Working principle:

[0030] During filtration, the liquid discharge pipe 201 and the liquid inlet pipe 3 are opened, and the sewage discharge pipe 101 is closed. Sewage slowly enters the inner cavity of the cylinder body 1 from the liquid inlet pipe 3, causing the liquid level in the inner cavity of the cylinder body 1 to rise. After being filtered by the filtering mechanism 4, the sewage is discharged from the liquid discharge pipe 201. At this time, the floating ring 10 floats up with the impeller 9, causing the impeller 9 to separate from the clamping seat 8;

[0031] After filtering for a period of time, the filtered solid impurities gather at the bottom of the cylinder body 1. Open the sewage discharge pipe 101 and close the liquid discharge pipe 201, causing the liquid level in the inner cavity of the cylinder body 1 to drop, causing the floating ring 10 to drive the impeller 9 to fall, and the impeller 9 is clamped to the clamping seat 8. Then increase the flow rate of the liquid inlet pipe 3, so that the liquid ejected from the liquid inlet pipe 3 pushes the impeller 9 to rotate. When the impeller 9 rotates, the impeller 9 drives the clamping seat 8 and the transmission shaft 7 to rotate together. At this time, the scraping plates 12 scrape off the solid impurities on the inner wall of the bottom of the cylinder body 1, so that the solid impurities flow towards the sewage discharge pipe 101. At the same time, the spiral blade 13 rotates to forcibly discharge the sludge (solid impurities) in the sewage discharge pipe 101. Since the diameter of the sewage discharge pipe 101 is much larger than that of the liquid inlet pipe 3, and the spiral blade 13 rotates to forcibly discharge sewage, the liquid level in the inner cavity of the cylinder body 1 will not rise;

[0032] After the sewage expansion vessel filters for a period of time, it discharges sewage intermittently to discharge most of the solid impurities generated by filtration.

[0033] It should be noted that the above content only illustrates the technical idea of the present utility model, and the protection scope of the present utility model cannot be limited thereby. For those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications all fall within the protection scope of the claims of the present utility model.

Claims

1. A sewage expansion container, comprising a cylinder (1), and a top cover (2) installed at the top opening of the cylinder (1), characterized in that: The top cover (2) is provided with a liquid discharge pipe (201) extending outwards, a filter mechanism (4) is installed at the top of the inner cavity of the cylinder (1), a mounting frame (5) is provided below the filter mechanism (4), a transmission shaft (7) is rotatably mounted at the center of the mounting frame (5), the transmission shaft (7) is coaxially fixed with a holder (8), the holder (8) is provided with a plurality of annular slots evenly distributed and opening upwards, and the opening of each slot is expanded outwards, the transmission shaft (7) is slidably sleeved with an impeller (9) up and down, The inner annular wall of the impeller (9) is provided with an insert adapted to the slot, the top of the impeller (9) is fixedly connected to a plurality of connecting columns (11), and the tops of the plurality of connecting columns (11) are commonly connected to a floating ring (10), a liquid inlet pipe (3) is fixedly passed through the side wall of the cylinder (1), and the liquid outlet of the liquid inlet pipe (3) points to the impeller (9) inserted into the seat (8), and a spiral blade (13) is installed at the bottom of the transmission shaft (7), and the spiral blade (13) is arranged in a sewage discharge pipe (101) of the cylinder (1).

2. A sewage expansion container according to claim 1, characterized in that: The filtering mechanism (4) comprises: a mounting ring (401) fixedly connected to the annular inner wall of the cylinder (1); the mounting ring (401) is rotatably engaged with a filter screen (402).

3. A blowdown expansion container according to claim 2, characterized in that: The mounting ring (401) is provided with a plurality of evenly distributed annular rotation slots, and the edge of the filter screen (402) is provided with protrusions adapted to the rotation slots.

4. A sewage expansion container according to claim 3, characterized in that: The protrusion of each filter screen (402) is threadedly connected to a fixing bolt (404), and the fixing bolt (404) slides through the mounting ring (401).

5. A sewage expansion container according to claim 1, characterized in that: A bearing (6) is embedded in the center of the mounting frame (5), and the inner ring of the bearing (6) is coaxially fixedly connected to the transmission shaft (7).

6. A blowdown expansion container according to claim 1, characterized in that: A plurality of scrapers (12) are arranged above the spiral blade (13) and are evenly distributed in an annular shape and in contact with the inner wall of the cylinder (1). Each scraper (12) is fixedly connected to the transmission shaft (7). The scraper (12) is arranged between the holder (8) and the spiral blade (13).

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