CN218511573U - Negative pressure type heat exchange system - Google Patents

Abstract

The utility model discloses a negative pressure formula heat transfer system, including water tank, heat exchanger, vacuum tank, water pump, water supply pipe and return water pipe, be provided with first water inlet, first delivery port on the water tank, be provided with second water inlet and second delivery port on the heat exchanger, be provided with water feeding mouth, third water inlet, gas vent and third delivery port on the vacuum tank, the gas vent sets up in the vacuum tank top, and the external blast pipe of gas vent is provided with discharge valve on the blast pipe. The water inlet of the water pump is connected with the third water outlet through a seventh pipeline. During the heat transfer, open the water pump and can make the heat transfer rivers operation under the negative pressure environment in the system, the pressure of the rivers pipeline in the heat exchanger is less than the pressure of air in air conduit and the heat exchanger, so even the heat exchanger fin takes place to reveal can not make water sneak into tower air yet to guarantee the normal use of adsorbent when can avoiding steam to adsorb, avoid the adsorbent to deteriorate the direct economic loss who makes and shut down and overhaul the indirect economic loss who causes.

Description

Negative pressure type heat exchange system

Technical Field

The utility model relates to an oxygen making equipment field, concretely relates to negative pressure formula heat transfer system.

Background

At present, two processes exist in the adsorption process of VPSA oxygen generation, one process is that after a fan is pressurized, airflow is directly sent into an adsorption tower for adsorption, the temperature of air entering the tower is influenced by the change of environmental temperature, and the fluctuation of adsorption capacity is caused by the unsteady air temperature, so that the oxygen yield is unstable. The other is that a gas-water heat exchanger is additionally arranged at the outlet of the fan, and the temperature of the airflow entering the tower is controlled and kept stable by adjusting the water quantity. The pressure of the pressurized gas in the heat exchanger is about 50Kpa, and the pressure of the cooling water is about 0.3 Kpa; because the adsorption process produces vibration, the heat exchanger fin takes place fatigue damage easily, leads to the cooling water to leak the back and sneak into tower air, and water makes the adsorbent totally inefficacy after blowing into the adsorption tower, and the loss is serious, and such case in the trade is many.

SUMMERY OF THE UTILITY MODEL

In order to keep the invariant of tower air temperature into, avoid the cooling water to reveal simultaneously and make adsorbent deteriorate inefficacy, the utility model provides a negative pressure formula heat transfer system even the blade of heat exchanger damages the leakage that also can not produce the cooling water, and entire system simple structure easily maintains, and the operation is safe, convenient, and the cooperation sets up relevant detection and controlgear can realize full automation. The method specifically comprises the following steps:

a negative pressure type heat exchange system comprises a water tank, at least one heat exchanger, a vacuum tank, a water pump, a water supply pipeline and a water return pipeline, wherein a first water inlet and a first water outlet are formed in the water tank; the first water inlet, the first water outlet, the second water inlet and the water supply port are respectively connected with a water supply pipeline through a first pipeline, a second pipeline, a third pipeline and a fourth pipeline, a water supply valve is arranged on the water supply pipeline between the first pipeline and the second pipeline, and a fourth valve is arranged on the fourth pipeline; the second water outlet and the third water inlet are respectively connected with a water return pipeline through a fifth pipeline and a sixth pipeline; and the water inlet of the water pump is connected with the third water outlet through a seventh pipeline.

Specifically, the first, second, third, fifth, sixth and seventh pipelines are respectively provided with a first valve, a second valve, a third valve, a fifth valve, a sixth valve and a seventh valve.

Specifically, the top of the water tank is also provided with an overflow port, the overflow port is externally connected with an overflow pipe, and the overflow pipe is provided with an overflow valve.

Specifically, the bottom of the water tank is further provided with a first emptying port, the first emptying port is externally connected with a first emptying pipe, and a first emptying valve is arranged on the first emptying pipe.

Specifically, the water tank is further provided with a first liquid level meter.

Specifically, a second emptying port is further arranged at the bottom of the vacuum tank, the second emptying port is externally connected with a second emptying pipe, and a second emptying valve is arranged on the second emptying pipe.

Specifically, a second liquid level meter is further arranged on the vacuum tank.

Specifically, the first delivery port of water tank sets up in the water tank top, the second pipeline is the siphon, and the upper end and the water supply pipe of siphon are connected, and the lower extreme of siphon passes first delivery port and extends to the bottom of water tank, be provided with the second valve on the siphon between water supply pipe and the first delivery port.

Specifically, the negative pressure type heat exchange system comprises at least 3 heat exchangers which are connected in parallel.

The utility model discloses an application of negative pressure formula heat transfer system in pressure swing adsorption preparation oxygen adopts negative pressure formula heat transfer system to carry out heat transfer treatment to the air earlier before adsorbing.

The utility model has the advantages that:

through the water tank, the water pump, the vacuum tank, the setting of water supply line and return water pipeline etc, when the heat transfer, open the heat transfer rivers that the water pump can make in the system operation under the negative pressure environment, the pressure of the rivers pipeline in the heat exchanger is less than the pressure of air in air conduit and the heat exchanger, so even heat exchanger fin takes place to reveal and also can not make water sneak into tower air, thereby can effectively avoid steam to guarantee the normal use of adsorbent when adsorbing, avoid the adsorbent rotten direct economic loss who makes and shut down the indirect economic loss who overhauls and cause.

Drawings

Fig. 1 is a schematic structural diagram of the negative pressure heat exchange system disclosed in the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments shown below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

As shown in fig. 1, a negative pressure type heat exchange system comprises a water tank 1.1, at least one heat exchanger 3, a vacuum tank 2.1, a water pump 6, a water supply pipe 4.1 and a water return pipe 5.1, wherein the water tank 1.1 is provided with a first water inlet and a first water outlet, the heat exchanger 3 is provided with a second water inlet and a second water outlet, and the vacuum tank 2.1 is provided with a water supply port, a third water inlet, an exhaust port and a third water outlet. The gas vent sets up in vacuum tank 2.1 top, the external blast pipe 2.2 of gas vent, be provided with discharge valve 2.3 on the blast pipe 2.2, appear damaged if heat exchanger 3 fin, probably sneak into the air in the return water pipeline 5.1, the air can be in vacuum tank 2.1's top gathering this moment, only need properly open vacuum tank 2.1 top discharge valve 2.3 of blast pipe 2.2 can discharge the air of sneaking into, and easy operation can not produce adverse effect to whole heat transfer process. The first water inlet, the first water outlet, the second water inlet and the water supply port are respectively connected with a water supply pipeline 4.1 through a first pipeline 4.4, a second pipeline 4.6, a third pipeline 4.8 and a fourth pipeline 4.10, a water supply valve 4.12 is arranged on the water supply pipeline 4.1 between the first pipeline 4.4 and the second pipeline 4.6, a fourth valve 4.11 is arranged on the fourth pipeline 4.10, the water supply valve 4.12 and the fourth valve 4.11 can be opened before the heat exchange system starts to work, water is supplied to the water tank 1.1, the heat exchanger 3, each pipeline and the vacuum tank 2.1 from the left water inlet end of the water supply pipeline 4.1, air in the system is exhausted, and when the water tank 1.1 and the vacuum tank 2.1 are filled with water, the water supply valve 4.12 and the fourth valve 4.11 are closed, so that the heat exchange operation can be carried out. The second water outlet and the third water inlet are respectively connected with a water return pipeline 5.1 through a fifth pipeline 5.2 and a sixth pipeline 5.4; and the water inlet of the water pump 6 is connected with the third water outlet through a seventh pipeline 7. The first, second, third, fifth, sixth and seventh pipelines are respectively provided with a first valve 4.5, a second valve 4.7, a third valve 4.9, a fifth valve 5.3, a sixth valve 5.5 and a seventh valve 8. The valve is preferably a valve capable of realizing flow regulation, and the communication or the closing of each pipeline and the flow can be controlled according to requirements.

The utility model discloses an embodiment, water tank 1.1 top still is provided with the overflow mouth, and the external overflow pipe 1.2 of overflow mouth is provided with overflow valve 1.3 on the overflow pipe 1.2. Still be provided with first level gauge 1.6 on the water tank 1.1, still be provided with second level gauge 2.6 on the vacuum tank 2.1. The liquid level meter is arranged, so that liquid levels in the water tank 1.1 and the vacuum tank 2.1 can be observed conveniently during water supply and heat exchange, and the working state can be adjusted timely according to liquid level change.

In an embodiment of the present invention, the bottom of the water tank 1.1 is further provided with a first emptying port, the first emptying port is externally connected to a first emptying pipe 1.4, and a first emptying valve 1.5 is arranged on the first emptying pipe 1.4. The bottom of the vacuum tank 2.1 is also provided with a second emptying port, the second emptying port is externally connected with a second emptying pipe 2.4, and a second emptying valve 2.5 is arranged on the second emptying pipe 2.4. When all the heat exchange water in the system is emptied in the process of maintenance or other needs, only the first emptying valve 1.5, the second emptying valve 2.5 and valves in all the pipelines need to be opened, and the operation is simple and convenient.

In an embodiment of the present invention, the first water outlet of the water tank 1.1 is disposed at the top of the water tank 1.1, the second pipe 4.6 is a siphon, the upper end of the siphon is connected with the water supply pipe 4.1, the lower end of the siphon passes through the first water outlet and extends to the bottom of the water tank 1.1, and the siphon between the water supply pipe 4.1 and the first water outlet is provided with the second valve 4.7. When the water pump 6 operates, negative pressure can be generated in the vacuum tank 2.1, then the negative pressure is generated at the joint of the siphon pipe and the water supply pipe 4.1 through the water return pipe 5.1, the heat exchanger 3 and the water supply pipe 4.1, then heat exchange water in the water tank 1.1 is pumped into the water supply pipe 4.1 through the siphon pipe under the action of the negative pressure, and the heat exchange water enters the vacuum tank 2.1 through the water return pipe 5.1 after entering the heat exchanger 3 through the water supply pipe 4.1 for heat exchange, so that heat exchange is completed.

In an embodiment of the present invention, the negative pressure heat exchange system comprises at least 3 heat exchangers 3 connected in parallel.

The utility model discloses an in the embodiment, all valves in this heat transfer system are automatic control valve, still are provided with automatic control device in the system, and automatic control device includes data receiver, signalling device and respectively with preceding both electricity be connected the computing device, the data receiver respectively with first, second level gauge 2.6 and each pipeline on the valve signal connection, signalling device respectively with each valve signal connection. The automatic control device can realize the automatic control of the whole heat exchange system.

The utility model discloses an in the system, water supply pipe 4.1's the external water source in left side, water supply pipe 4.1's left side is provided with total water supply valve 4.3.

The utility model discloses a negative pressure formula heat transfer system can be used for the air heat transfer when pressure swing adsorption preparation oxygen, adopts earlier before adsorbing the utility model discloses a negative pressure formula heat transfer system carries out heat transfer treatment to the air. Specifically, air firstly enters the heat exchanger 3 from a heat exchange inlet of the first heat exchanger 3 through the air pipeline 9 for heat exchange, flows out from an outlet of the first heat exchanger 3 after the first heat exchange, then sequentially enters the subsequent heat exchanger 3 through the air pipeline 9 for heat exchange, and enters the adsorption tower for adsorption treatment after the heat exchange is finished.

The utility model discloses a negative pressure formula heat transfer system's concrete application method does:

(1) Water supply and exhaust before the device is started:

the vacuum tank 2.1, the water supply pipe 4.1, the water return pipe 5.1 and the water tank 1.1 are filled with water in advance, and air is exhausted. The specific operation is as follows: the first emptying valve 1.5 and the second emptying valve 2.5 are closed, and all the other valves are opened. And (3) supplying water through a water supply pipeline 4.1, closing the first valve 4.5 and the second valve 4.7 after the overflow pipe 1.2 of the water tank 1.1 discharges water, and continuously supplying water to other equipment in the system. After the exhaust pipe 2.2 discharges water, the switch of the external water source of the water supply pipeline 4.1 is closed, and the exhaust valve 2.3 doors on the exhaust pipe 2.2 are arranged, so that the water supply and exhaust work is finished.

(2) The working process and action principle of the device are as follows:

the second valve 4.7 and the water pump 6 are opened and the feed water valve 4.12 and the fourth valve 4.11 are closed. The water pump 6 is started, the water pump 6 applies work to generate required negative pressure, the water pump 6 pumps water in the vacuum tank 2.1, the upper part of the vacuum tank 2.1 generates vacuum, the vacuum pressure depends on the discharge capacity of the water pump 6 according to the thermodynamic principle, so that the negative pressure and the water flow in the heat exchange system can be adjusted through the motor frequency of the water pump 6, and the water pumped by the water pump 6 is sent for cooling.

Water in the water tank 1.1 enters a water supply pipeline 4.1 through a siphon pipe under the siphoning action, flows through a plurality of third pipelines 4.8 which are distributed on the water supply pipeline 4.1 in parallel and respectively enter each heat exchanger 3, heat exchange water and tower inlet air in an air pipeline 9 exchange heat and then flow into a fifth pipeline 5.2, and flows into a water return pipeline 5.1 and then flows into a vacuum tank 2.1, and the water pressure and the flow entering the heat exchanger 3 are stable through a third valve 4.9 on the third pipeline 4.8.

All valves in the heat exchange system are automatic control valves, an automatic control device is further arranged in the system, the automatic control device comprises a data receiving device, a signal sending device and a computing device which is respectively electrically connected with the data receiving device and the signal sending device, the data receiving device is respectively in signal connection with the first liquid level meter 2.6, the second liquid level meter and the valves on the pipelines, and the signal sending device is respectively in signal connection with the valves. The automatic control device can realize the automatic control of the whole heat exchange system. The water supply pipeline 4.1 is externally connected with a water source, and the leftmost facility of the water supply pipeline 4.1 is provided with a main water supply valve 4.3. The first liquid level meter 1.6 on the water tank 1.1 measures the liquid level in the water tank 1.1 in real time, and transmits a liquid level signal to a signal receiving device of an automatic control device in real time, the signal receiving device conveys a received signal to a computing device, the computing device computes a control instruction according to set parameters and real-time signals and sends the instruction to a signal sending device, and the signal sending device sends the control signal to a corresponding control valve so as to complete automatic control. When the liquid level is about to be unable to submerge the lower end of the siphon branch pipe, the automatic control device controls the main water supply valve 4.3 and the first valve 4.5 of the water supply pipeline 4.1 to be automatically opened, and water is supplemented into the water tank 1.1 through the first pipeline 4.4.

Because the heat exchange water flow works in a negative pressure environment, the pressure of the water flow is lower than the pressure of the air in the air pipeline 9 and the heat exchanger 3, and water cannot be mixed into the tower air even if the fins of the heat exchanger 3 leak.

(3) And (3) device parking and work abnormity processing:

when the device needs to be stopped or work is abnormal and needs to be stopped for checking, the water pump 6 is stopped. And (4) restarting the automobile only by repeating the steps (1) - (2). In the operation process of the system, when air is gathered in the vacuum tank 2.1, the air resistance can influence the operation of equipment, and the problem of the air resistance can be solved by properly finely adjusting the exhaust valve 2.3. When the device needs to be emptied of water flow, this can be done by opening the first emptying valve 1.5 and the second emptying valve 2.5.

In the description of the present application, it is to be noted that the terms indicating orientation or positional relationship used in the present application are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and operate, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly and encompass, for example, a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A negative pressure type heat exchange system is characterized by comprising a water tank, at least one heat exchanger, a vacuum tank, a water pump, a water supply pipeline and a water return pipeline, wherein a first water inlet and a first water outlet are formed in the water tank; the first water inlet, the first water outlet, the second water inlet and the water supply port are respectively connected with a water supply pipeline through a first pipeline, a second pipeline, a third pipeline and a fourth pipeline, a water supply valve is arranged on the water supply pipeline between the first pipeline and the second pipeline, and a fourth valve is arranged on the fourth pipeline; the second water outlet and the third water inlet are respectively connected with a water return pipeline through a fifth pipeline and a sixth pipeline; and the water inlet of the water pump is connected with the third water outlet through a seventh pipeline.

2. The negative pressure heat exchange system of claim 1, wherein the first, second, third, fifth, sixth and seventh pipes are respectively provided with a first, second, third, fifth, sixth and seventh valve.

3. The negative pressure heat exchange system of claim 1, wherein the top of the water tank is further provided with an overflow port, the overflow port is externally connected with an overflow pipe, and the overflow pipe is provided with an overflow valve.

4. The negative pressure heat exchange system according to claim 3, wherein the bottom of the water tank is further provided with a first evacuation port, the first evacuation port is externally connected with a first evacuation pipe, and a first evacuation valve is arranged on the first evacuation pipe.

5. The negative pressure heat exchange system of claim 1, wherein the water tank is further provided with a first liquid level meter.

6. The negative pressure type heat exchange system according to claim 1, wherein a second evacuation port is further arranged at the bottom of the vacuum tank, the second evacuation port is externally connected with a second evacuation pipe, and a second evacuation valve is arranged on the second evacuation pipe.

7. The negative pressure heat exchange system of claim 1, wherein the vacuum tank is further provided with a second liquid level meter.

8. The negative pressure heat exchange system according to any one of claims 1 to 7, wherein the first water outlet of the water tank is arranged at the top of the water tank, the second pipeline is a siphon, the upper end of the siphon is connected with the water supply pipeline, the lower end of the siphon passes through the first water outlet and extends to the bottom of the water tank, and a second valve is arranged on the siphon between the water supply pipeline and the first water outlet.

9. A negative pressure heat exchange system according to any of claims 1 to 7, wherein the negative pressure heat exchange system comprises at least 3 heat exchangers connected in parallel.

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