JPS6038508A - Condensed water recovering pump device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Objective) The present invention aims to reduce condensate (high quality water) generated in steam-using equipment.
It relates to a condensate recovery pump device that uses an electric pump to pump condensate to a location with higher pressure than the point of generation, such as a boiler.

In this case, in order to prevent cavitation from occurring in the electric pump, it is necessary to bring the condensate at the suction port of the pump into an extremely small f', II state. In addition, the discharge of condensate from steam-using equipment shall not be obstructed. Here, the light gravity 7.11 state refers to a state where the temperature of the fluid is lower than the saturation temperature corresponding to its pressure, or in other words, a state where the pressure or saturation pressure is higher than the fluid temperature, and in the condensate recovery pump device. is usually 0.5/' CI! An overpressure (supercooled fill) state of about 100 liters is required.

In order to bring the condensate into a supercooled state at the suction port of the pump without interfering with the discharge of the condensate, a Sierra I-11 pump has conventionally been used. This system circulates a portion of the water discharged from the electric pump to drive the ejector-structured jet pump, which guides condensate from steam-using equipment to a low-pressure area around the nozzle and sucks it into the diesel pump. The pressure is increased by 4 J to bring the condensate into a supercooled state, and the condensate is sent to the suction port of the pump. but,
In this case, chef 1 ~ 21 of the amount of condensate sucked by the pump
8 or so must be circulated, requiring a large-capacity pump, which increases running costs.

The condensate tank is built at a high location, and the tank is connected to the electric pump with a down pipe, and the condensate at the pump suction port is supercooled by the weight of the condensate (head pressure) in the down pipe. Previously, it was also my responsibility to do so. In this case (well, the condensate tank has to be placed about 5m above the ground), which requires a large amount of money for the tower and foundation work. There is no low pressure condensate (it cannot be recovered).

Therefore, we thought of introducing condensate into a tank placed on the ground, and when pumping, pressurized gas such as compressed air or steam would be injected into the tank to turn the condensate into a hot water cooling system.

By using two tanks δ9 and always maintaining one tank at a low pressure, it is possible to introduce condensate (using steam) into the tank without interfering with drainage. At this point, give priority to the tank in which the condensate of i'+i has accumulated first.1. 'c lf is sent, and the condensate cannot fit into the tank, so it must be discarded (1), or it must be stored in the tank (the time in between should be reduced).

The technical problem of the present invention is to inject pressurized gas into the tank in which a predetermined meter of condensate has accumulated first, without pressurizing both plastics of the two tanks at the same time. It is often said that priority should be given to pumping.

(Structure) Techniques of the present invention taken to solve the above problems 1) J means are as follows. In other words, (a) ``Place condensate tanks in a double subrow on the suction side of the electric pump (), ``Means to maintain the internal pressure at low pressure so that condensate flows into each tank'' Then, install a means to introduce pressurized gas to supercool the water that has accumulated inside (B, (C) 2 water levels, upper and lower, in each tank) and remove the water level gauge. "hair,(
d) Condensate from the tank that reached the upper water level first is given priority and continues to be pumped until the water level in that tank drops below 1 inch (V'71). ) A controller 1 to rollers are installed to control the pressurized gas introduction means.

The above means works as follows. In other words, the water level in the tank is detected on the water level side, and when the water level in either tank reaches the upper water level, the pressurized gas introducing means acts and pressurized gas is injected into that tank. be done. When covered, the pressure inside increases, so the condensate becomes supercooled and is pumped out using an electric pump. This pumping continues until the water level in the other tank falls below the upper water level, and the pond tank is maintained at a low pressure during that time regardless of its water level due to the action of the low pressure maintaining means, and condensate flows in and accumulates. This priority state is canceled when the water level in the previous tank falls below the upper water level.

(Special effect) The above means of the present invention provides the following unique effects.

If a pump is used, the running cost increases because it circulates a large amount of water, but in the present invention,
How to pressurize the condensate tank? ? It consumes a small amount of energy or steam ().

In the present invention, there is no need to erect the condensate tank at a high place, so the equipment cost is not increased.

77i 1) Since the condensate from the tank that reached the upper water level first is pumped with priority, the tank containing water is always pressurized first. jZ, Ii
Since the tank has to be emptied, 4f of condensate must be discarded (there is less m of condensate to be pumped).

(Example> For a description of a specific example of the present invention, see FIGS. 1 and 2).

Between the condensate introduction passage 11 and the pressure feeding passage 12, two 1L condensate tanks 13 and 14 are arranged in parallel. The steam passageway 11 is connected to steam-using equipment (not shown), and the moon-shipping path 12 is connected to a destination (not shown) such as a boiler.

The condensate introduction passage 11 branches into each tank 13. Connect to the top of '14, and check the branch part with a backstop ti'15.

16 (Pull it.) Connect the electric pump 17.'18 and check valve 19.2 to the condensate pressure feeding passage 12 connected to the bottom of each tank.
Install 0. These condensate pressure feed passages 12 merge into one condensate pressure feed passage 12 at the end of the check valves 19, 20, and a pressurized gas introduction passage 21.2 is formed in the upper part of each tank 13.14.
2 is connected, and an electric valve 23.24 is attached to the passage 21.22. At the top of each tank 13.14, roughly
Connect the exhaust passages 25.26, each J) 1 air passage 25.2
Attach the primary pressure regulating valve 27°28 and the superposed 1 valve 29.30 to 6.

- The next control valve 27.28 is used when the pressure in the primary side, that is, the tank 13.1'l, exceeds the set value.
When collecting condensate with a temperature higher than C, it is used by placing it closer to the tank 13, 14 than the solenoid valve 29, 30.

Each tank 13.14 has a water level fft31.32. The water level gauge 31.32 has an electrode rod and detects whether the water level in the tank has reached a predetermined water level.

Water level gauge 31.32, electric pump 17. IE3.7h valve train 23, 24. The solenoid valves 29 and 30 are controllers (not shown) and are electrically connected as shown in FIG.

@ In figure 2, the upper connection end a, 1) is the lower lX+I
! Connect to jl ends a and b. In the diagram, the symbol suffix C1
U1 and 2 are related to tanks 13 and 14, respectively.
It shows that there is. Terminals R, S, and (also power supply)

Symbols Pl and p2 are electric pumps 17 and 18', respectively.
)%! JJ1m wo, Ml, M21. The above N motion is expressed as '\0) nX Indicates the contact that opens and closes the force supply circuit.

Reference number 51.52 indicates water level i131, 32 switch circuit elements, 53.5/l indicates electric current, 5
At 5.56, the water level in tank 13.14 was about 1.

It shows the water level contact point that I hear closes when it reaches the upper water level and drops to the upper water level.

Symbols X1 and X2 inside the circle represent relays, and Xl and X2 represent relay contacts. Tl and T2 in the circle are timers,
D11 D2 does not show a timer contact. Timer TI, T2
When energized, contact TI will close after a predetermined time.

When energization is correct, contacts TI and T2 are connected instantly.
open.

Note inside the circle @M1. . . . 12 indicates a magnet 1 switch, and the contact M1 . Open and close M2. Notes inside the circle S; V
1, V2 LL electric valve 23.24, si, s2 solenoid valve 29.30.

For each of the above contacts, the hollow hollow indicates the make contact, and the hollow hollow indicates the break contact.

The outline of the operation is explained below.

At start-up, both tanks 13,14 are empty and the water level contact 5
5.56 is listening, so relay X1゜×2 also switches on timer T1. T2 is also not activated, electric pumps 17, 18 are stopped, electric valves 23, 24 are closed, and solenoid valves 29, 30 are closed. Both tanks 13.1/l are therefore at low pressure and condensate enters through the inlet channel 11.

When the water level of one tank, for example tank 13, reaches a predetermined water level earlier than the tank 14 of the other fj), the water level gauge 3
Since the water level contact 55 of No. 1 is closed, S1 NOx1 is energized, and the motor-operated valve 23 (Vl) is opened t5, rls l:1
As the 1 valve 29 (81) closes, the timer 11 starts operating. Therefore, pressurized gas flows into the tank 13 through the introduction passage 21. This dosing tank 13 is shut off from the condensate passage 1'1 by the action of the check valve 15, and the secondary side of the check valve 19 is not opened due to high pressure and the condensate pressure feeding passage 1
2, the pressure inside the tank 13 increases and the condensate becomes in the JJI state. Then, when the predetermined period of time has elapsed, the timer contact 1-1 turns on due to the action of the timer T1, and the link net switch M1 becomes energized, closing its contacts 1 to 11.
<Pl) After 1 degree of startup, the condensate in the tank 13 is pumped out to the pressure-feeding passage 12).

When the water level in the tank 13 falls to a predetermined upper water level due to the above-mentioned pressure feeding, the water level contact 55 opens and the electric pump 17
stops, the electric valve 23 does [rl], and the two solenoid valves open,
The state returns to the original condition where condensate flows in.

Even if the water level in the tank 14 reaches the upper water level before the water level in the tank 13 reaches the upper water level, the break contact X1 connected in series with the water level contact 56 is open due to the action of the relay Since the tank 14 is not energized, the tank 14 is maintained in a state where the condensate 71E is filled. Condensate that cannot fit into the tank 14 flows out through the exhaust passage 2G.

Even if the water level in the tank 14 reaches the upper water level before the water level in the tank 13, the same operation as above will occur. This is because the structure of the device is made symmetrically with respect to the tank 13 and the tank 14, so the operation Vt light is omitted.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an outline of an embodiment of a condensate recovery pump device according to the present invention and its whistle distribution state, and FIG. 2 is an electrical wiring diagram of a controller. 1: Condensate introduction passage 12: Condensate pressure feeding passage 13.14: Condensate tank 17.18: Electric pump 21.22: Pressurized gas introduction passage 23.24: Electric valve 25.26: Exhaust passage 29.30: Solenoid valve 31.32: Water level patent applicant

Claims (1)

[Claims] (1) Two condensate tanks are installed in parallel on the suction port side of the electric pump, and a means is provided to maintain the internal pressure at a low level so that condensate can flow into each tank, and to supercool the condensate accumulated inside the tank. A means for introducing pressurized gas is installed in each tank to detect the upper and lower water levels, and the condensate from the tank that reaches the upper water level first is added to the upper water level. The condensate recovery pump device is equipped with a controller that controls the low pressure maintaining means and the pressurized gas introducing means so as to continue pressure feeding with priority until 4.