JPH0128232B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for condensing vapor components in the intake air of a water ring pump.

Water ring pumps often handle high-temperature, high-humidity gas containing a large amount of water vapor, but in such cases, the intake gas is cooled, the water vapor is condensed, and removed from the intake gas. If this is possible, the volume of the intake gas can be significantly reduced before it flows into the impeller, and a new gas with a volume approximately equal to this reduction can be sucked in. Even if the suction capacity of the water ring pump is constant, As a result, the suction capacity is greatly increased, especially as the vacuum becomes higher.

The present invention utilizes the above condensation effect to cool and condense the high-temperature and high-humidity intake gas with a thin film spray of cooling liquid that can increase the contact area with the intake gas inside the pump. The purpose of this invention is to increase the suction capacity of the pump by allowing the cooling and condensation to be uniformly and effectively performed on the intake gas using a simple device.

The gist of the present invention is to provide a double vertical wall around the intake port in the water ring pump body at the mouth edge and the outside thereof to form a coolant flow path between the two walls. and a cover member having a flat surface capable of covering the open side of the coolant flow path is fixed with bolts, with a gasket interposed only on the upper surface of the outer vertical wall to open an intake port having substantially the same shape as the intake port; A spray box is provided between the cover members on the inner vertical wall and has an opening with a linear overall shape that can spray the cooling liquid in a thin film in a direction substantially perpendicular to the flow of the intake gas, and cools the pump from outside. The present invention relates to a device for condensing vapor components in intake air of a water ring pump, in which the coolant flow path is connected to a coolant inlet path for supplying liquid.

More specifically, in the case of a side air outlet type water ring pump, double standing walls are installed around the intake port provided on the control board, and a gasket is interposed only on the upper surface of the outer standing wall. A flat top plate serving as a cover member was fixed with bolts to form a spray box. In addition, in the case of a side air port type water ring pump, double standing walls are installed around the intake port opened in the intake and exhaust pipe, and a gasket is interposed only on the top surface of the outer standing wall, so that the intake and exhaust pipe is closed. A spray box was formed by bolting and fixing the cover member to the inner wall surface of the cover of the pump body.

The present invention can be applied to all types of water ring pumps, including so-called internal air port type and side air port type, single-acting type and dual-acting type, double-blade type and single-blade type, etc. This does not question the above distinction. Moreover, it is possible to implement not only the case where water vapor is cooled and condensed with water, but also the case where a vapor other than water vapor is cooled and condensed with a cooling liquid other than water.

The details of the present invention will be explained based on the embodiments shown in the drawings.The present invention has a spray box which sprays the pump coolant in the form of a film, and the typical structure of the conventional pump is approximately cylindrical. An impeller 3 with a rotating shaft 2 inserted therein is installed inside a shaped casing 1,
In the case of the side air vent type, a substantially disc-shaped control plate 4 is arranged at both ends or one end of the casing 1, and in the case of the internal air vent type, a so-called intake and exhaust pipe 5 is placed inside the impeller 3 instead of the control plate 4. A substantially bowl-shaped cover 6 is inserted and then placed over the control plate 4 or the intake/exhaust pipe 5.
is attached to the control board 4 or the casing 1.

The condensing device of the present invention has the above-mentioned structure, and a spray box 7, which is easy to manufacture and has a simple structure, is installed inside the water ring pump body, and the installation position is such that the water is sucked into the pump by the rotation of the pump impeller 3. It is provided in the intake side space until the gas body is sucked into the impeller 3, and specifically, it is provided in the control plate 4 in the side air outlet type and in the intake and exhaust pipe 5 in the internal air outlet type. , the cooling liquid is sprayed in a film form across the gas body before it is sucked into the impeller 3 in any direction, preferably in a direction substantially perpendicular to the gas flow, so as to form fine particles in the intake gas body. The purpose is to cool the gas by uniformly dispersing it in the form of water droplets and increasing the area of contact with the gas.

The basic structure of the spray box 7 is a substantially box-shaped body having a coolant flow path 8 therein and one or more openings 12 having a linear overall shape. The shape varies depending on the installation location and pump model.

The pump shown in FIGS. 1 and 2 is a side-port type pump in which the present invention is implemented, and a spray box 7 is provided on the control plate 4 of the pump. That is, the vertical wall portion 9 on the control board 4,
9 is erected and a top plate 10 is positioned on the top plate 10 to form a substantially box-shaped body. A shaped opening 12 is opened toward the intake port 11. More specifically, in this embodiment, double vertical walls 9, 9 are formed around the intake port 11, and the inner vertical wall section 9 is made to substantially match the mouth edge of the intake port 11, so that the dual wall section 9 , 9, and a flat top plate portion 10 serving as a cover member is attached with bolts 14 only to the upper surface of the outer vertical wall portion 9 via a gasket 13. The structure is such that the packing 13 is not interposed on the upper surface of the inner vertical wall portion 9 which covers the open side of the opening 12, and when the compatible wall portions 9 and 9 are made at the same height, the thickness of the packing 13 An opening 12 having a width of .

Further, as another embodiment of the opening 12, a flat or corrugated plate material or a wire mesh body (not shown) may be inserted into the opening 12 to further divide the liquid flow ejected from the opening 12. By making the film thinner, the contact area with the intake gas can be increased, and the condensation efficiency can be further increased. Furthermore, if the pump is large, the intake port 11 will also have a large diameter, so a spray box 7 having an intake opening and coolant spray holes is installed across the intake port 11, and It is also possible to ensure that the gas body is sufficiently sprayed with coolant before being inhaled.

Reference numeral 15 denotes a rib-shaped partition wall 1 provided on the control board 4 to supply operating water necessary for operating the water ring pump.
Separately from the supply waterway 15, in the embodiment, a coolant inlet passage 17 formed by partition walls 16, 16 is provided, and the compatible wall portions 9, 9 in the spray box 7 are provided. The coolant flow path 8 formed therebetween is also electrically connected to the cooling liquid flow path 8 through a communication path 18 extending by cutting out a part of the outer vertical wall portion 9. However, it is also possible to connect the supply water channel 15 and the coolant flow path 8 of the spray box 7 to form an integrated structure.

3 and 4, the present invention is implemented in an internal air port type pump, and a spray box 7 is provided in the intake and exhaust pipe 5 of the pump. That is, the spray box 7 is located around the intake port 11 of the intake/exhaust pipe 5, and on the upper surface of the flange disk 19 for attachment to the cover 6 provided on the outer periphery of the intake/exhaust pipe 5, and around the entire circumference of the inner body 20. Vertical wall portions 9, 9 are provided vertically, and a concave groove serving as the coolant flow path 8 is provided circumferentially between the vertical wall portions 9, 9. Similarly, Patsukin 13
The intake and exhaust pipe 5 is connected to a plurality of bolts 14 with
... by attaching it to the inner wall surface 6a of the cover 6, an opening 12 having a width equal to the thickness of the gasket 13.
A spray box 7 is provided facing the intake port 11.
It consists of Here, the inner wall surface 6a of the cover 6
is used as a cover member for covering the open side of the coolant flow path 8 in the same way as the top plate section 10.

Reference numeral 15 denotes a replenishment waterway similar to that of conventional pumps, with an intake port 11 and a discharge port 2 curved between the replenishment waterway 15.
1 is located, and in this case, a packing 13 is interposed between the contact surface between the flange disk 19 and the cover inner wall surface 6a.
is placed in the shaded area in Figure 4, and the gasket 13
That is, the area where the spray box 7 is not located becomes the opening 12 of the spray box 7.

Further, in the case of the side vent type, the inlet path 17 corresponding to the coolant inlet path 17 provided in the control board 4 is as follows.
A recessed portion is formed with a depth similar to or greater than the recessed groove that is provided around the intake and exhaust pipe 5 and becomes the coolant flow path 8. However, as in the side air port type, it is also possible in this case to have a structure in which the supply waterway 15 also serves as the coolant inlet channel 17 to supply the coolant from the supply waterway 15 to the coolant flow channel 8 in the spray box 7. You can take it.

The spray box 7 shown above as an embodiment of the present invention has a structure that is arranged around the intake port 11, but the present invention sprays the cooling liquid uniformly in the form of a film onto the intake gas body. As shown in FIGS. 3 and 5, the spray box 7 can be provided on the inner wall surface 6b of the cover 6 as long as the purpose is not lost. Upper and lower openings 12 of the strips 2
Although not shown in the drawings, a structure in which the structure is opened in steps or the like can be effectively implemented.

The configuration of the pump equipped with the condensing device of the present invention is as described above, and the pump operates by sending make-up water from outside the pump to the make-up waterway 15 through the communication channel (not shown) of the cover 6. The gas is supplied from the water channel 15 into the casing 1, and the impeller 2 rotates to suck and discharge the gas.

On the other hand, the cooling liquid of the same quality as the make-up water is supplied to the coolant inlet through the communication channel (not shown) in the cover 6 or directly from a supply means outside the pump in the same system as the make-up water or a separate system. 17 and the inlet passage 17
The coolant is injected into the coolant flow path 8 in the spray box 7 through the communication path 18, etc., and is sprayed in the form of a film from the opening 12. After cooling the intake gas and condensing its vapor components, it is sucked. and joins with makeup water.

The gas that is sucked into the pump by the rotation of the impeller 3 enters the intake side space in the cover 6 from the pump suction pipe 22, and passes through the control plate 4 or the intake port 1 of the intake/exhaust tube 5.
1 and is sucked into the impeller 3, and before the suction, the intake gas is cooled and solidified by sufficiently contacting the film-like cooling liquid in the spray box 7.

Due to this cooling condensation effect, the intake gas body is cooled and its specific volume is reduced, and most of the water vapor component in the intake gas body is condensed and removed from the gas body, reducing the overall gas volume and, as a result, the impeller The gas suction capacity of No. 3 is increased, and the effect is particularly noticeable for high temperature and high humidity gas bodies.

FIG. 6 shows the increase in suction capacity of a single-acting-side air-port water ring pump incorporating the condensing device of the present invention.

The suction gas is humid air (hereinafter referred to as air containing saturated water vapor), the make-up water and cooling water are at 15℃, and the horizontal axis shows the suction vacuum degree Q in absolute pressure Torr (mmHg abs). , the suction state suction amount V is expressed in m ³ /min on the vertical axis. Curve A shows the intake amount of humid air at 15°C. Since water at 15°C has no cooling or condensing effect, the amount of suction remains the same whether or not film spraying of cooling water is performed in addition to supplementary water supply.

Curve B is the case when humid air at 35 degrees Celsius is sucked without using a condensing device and only by supplying makeup water. In this case, although insufficient, there is a condensation effect due to the working water that exists in a ring around the impeller, and curve A
Compared to inhaling humid air at 15℃, the total amount of inhalation increases.

Next, curves C to G show the total suction amount when humid air with a temperature higher than the cooling water temperature of 15°C is sucked in while supplying make-up water and film-spraying the cooling water from the condensing device of the present invention. The curve C is
20℃, curve D is 25℃, curve E is 30℃, curve F is 35℃
℃, curve G is for humid air at 40℃. The higher the temperature and vacuum (lower the absolute pressure), the higher the water vapor ratio in the intake gas, the greater the effect of condensation by film spray, and the greater the rate of increase in the intake amount. The value of the condensing device of the invention is then shown by comparing curves F and B. That is, when the same 35° C. humid air is sucked, if the membrane spray of curve F is applied, the suction amount at high vacuum is nearly three times that of the case without membrane spray of curve B.

As described above, the present invention sprays the cooling liquid in a thin film form from the opening provided around the intake port in the water ring pump body in a direction substantially perpendicular to the flow direction of the intake gas. The coolant immediately turns into fine water droplets in the gas body and is dispersed almost uniformly within the intake port, ensuring effective and sufficient contact between the gas body and the coolant, thereby removing water vapor components in the intake gas body. It is possible to condense and cool the intake gas to reduce its volume, and increase the intake amount by approximately the same amount as the volume. The speed can be greatly increased, and since the coolant is sprayed from around the intake port, the spray pressure of the coolant can be lowered compared to when it is sprayed from a single point, and therefore the intake gas body It is extremely efficient as it can minimize pressure loss and the power required for spraying.

In addition, the amount of coolant sprayed and the distance the spray reaches must be set appropriately depending on the supplied liquid pressure, the cross-sectional area of the intake port, and the purpose of use of the pump. By interposing a gasket between the inner wall of the pump body cover or the inner wall of the pump body cover, the opening width of the opening can be easily finely adjusted by adjusting the thickness of the gasket, and the spray state of the coolant can be adjusted as desired. It can be changed into a thin film, and the above-mentioned delicate hydraulic pressure adjustment at the site of use can be omitted.

The spray box for spraying the coolant has two vertical walls around the intake port, one on the edge of the mouth and the other on the outside thereof to form a coolant flow path between the walls. By simply interposing a gasket on the upper surface of the vertical wall to open an intake port having approximately the same shape as the intake port, and fixing with bolts a cover member having a flat portion that can cover the open side of the coolant flow path, the inside An opening having an extremely precise opening width can be formed between the vertical wall portion and the cover member toward the intake port side, and the structure is simple, making manufacturing easy and minimizing cost increases. It is possible.

[Brief explanation of drawings]

Fig. 1 is a partial cross-sectional internal explanatory diagram of a side air port water ring pump embodying the present invention, Fig. 2 is a front view of the control board, and Fig. 3 is a portion of an internal air vent water ring pump embodying the present invention. 4 is a perspective view of the intake and exhaust pipe, FIG. 5 is a front view of the vapor component condensation device attached to the inner wall surface of the cover in FIG. 3, viewed from inside the cover, and FIG. 6 is the condensation device of the present invention. It is an experimental data diagram showing the suction capacity of a water ring pump with a built-in water ring. DESCRIPTION OF SYMBOLS 1... Casing, 2... Rotating shaft, 3... Impeller, 4... Control board 4, 5... Intake and exhaust pipe, 6... Cover, 7... Spray box, 8... Coolant flow path,
9... Vertical wall part, 10... Top plate part, 11... Intake port, 12... Opening part, 13... Packing, 14...
...Bolt, 17...Cooling liquid inlet path, 18...Connection path.

Claims (1)

[Claims] 1. Around the intake port in the water ring pump main body, double vertical walls are provided on the mouth edge and the outside thereof, and a coolant flow path is formed between the dual walls, An intake port having substantially the same shape as the above-mentioned intake port is opened with a gasket interposed only on the upper surface of the outer vertical wall portion, and a cover member having a flat portion capable of covering the open side of the coolant flow path is fixed with bolts. A spray box is provided between the vertical wall portion and the cover member, and the spray box has an opening with a linear overall shape that can spray the cooling liquid in a thin film in a direction substantially perpendicular to the flow of the intake gas, and the cooling liquid is supplied from outside the pump. A device for condensing vapor components in intake air of a water ring pump, characterized in that the cooling liquid flow path is connected to a cooling liquid inlet path for supplying the cooling liquid. 2. As the spray box, double standing walls are installed around the intake port provided on the control board of the side air port type water ring pump, and a gasket is interposed only on the upper surface of the outer standing wall to serve as the cover member. 2. A device for condensing vapor components in intake air of a water ring pump according to claim 1, wherein the spray box is formed by fixing a flat plate-like top plate portion with bolts. 3 As the above-mentioned spray box, a double vertical wall is installed around the intake port provided in the intake and exhaust pipe of the internal air port type water ring pump, and a packing is interposed only on the upper surface of the outer vertical wall, so that the intake and exhaust pipe is 2. The device for condensing vapor components in intake air of a water ring pump according to claim 1, wherein the spray box is formed by bolting and fixing to the inner wall surface of the cover of the pump body as the cover member.