CN104390512B - A kind of reinforced scavenging type heat-exchanger rig - Google Patents

Abstract

A kind of reinforced scavenging type heat-exchanger rig, belongs to energy technology field.The fouling in non-clean water and clean water heat transfer process and the low problem of heat exchange efficiency can be solved.Motoring reversal valve is provided with a non-clean water inlet and two non-clean water outs, one in two non-clean water outs is communicated with the non-clean water inlet of First Heat Exchanger, the remaining next one is communicated with the non-clean water inlet of the second heat exchanger, and the non-clean water out of two heat exchangers is communicated with non-clean water water outlet main pipe road; When non-clean water inlet communicates with in two non-clean water outs, non-clean water inlet does not communicate with the remaining next one in two non-clean water outs; When non-clean water inlet does not communicate with the non-clean water out of the one described in motoring reversal valve, non-clean water inlet communicates with the described non-clean water out of the remaining next one; The outlet of two clean water branch pipeline respectively with the clean water inlet communication of two heat exchangers.The present invention is used for non-clean water and clean water heat exchange.

Description

An enhanced descaling type heat exchange device

technical field

The invention relates to a heat exchange device and belongs to the field of energy technology.

Background technique

Unclean water such as sewage and surface water is rich in low-grade heat energy, which can be extracted by heat pump technology to provide heating and air conditioning for buildings, which has huge energy-saving, environmental protection and economic value, and its energy-saving rate can reach more than 45%. . According to the calculation of my country's existing sewage discharge, the development and utilization of low-level thermal energy of sewage (calculated based on a temperature drop of 4~5°C) can provide heating and air conditioning for 20% of urban buildings. one of the effective ways.

Sewage source or surface water source is a kind of water source. Compared with groundwater, its main feature is that it has a large content of impurities, which is easy to form dirt on the heat exchange wall surface, which not only affects the heat exchange efficiency, increases the flow resistance of the fluid, but also accelerates the corrosion of the pipe wall. The service life of heat exchange equipment is greatly reduced. Therefore, anti-scaling and descaling are the key technologies for using non-clean water for heat exchange.

The current anti-scaling technology mainly has the following two forms, and both of them have certain deficiencies.

The first is the online cleaning technology of rubber balls, such as patent number 201320209861.1, announcement number CN203240955U, and a utility model patent named "rubber ball cleaning device for heat pump". It can achieve the purpose of cleaning the inner wall of the heat exchange tube with rubber balls, but its use effect is not ideal in the case of poor water quality, not only the ball collection rate is low, but also the secondary filter and the ball collection net also have scaling and Corrosion problem, low heat transfer efficiency.

The second is the on-line cleaning technology of inserts in the pipe (such as rotating ties, etc.), such as patent number 200720154258.2, announcement number CN201034457Y, and a utility model patent technology named "Spiral Coil Automatic Descaling Enhanced Heat Exchange Device", which relies on the action of fluid to rotate Or vibration to achieve the purpose of anti-scaling, but for the non-clean water heat exchanger with large heat transfer area, large number and long heat transfer tubes, the mechanical process is too complicated, the initial investment is large, and the non-clean water with a lot of impurities is easy to It will cause blockage and corrosion damage of the insert, which will affect the heat exchange efficiency.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide an enhanced descaling type heat exchange device, which can effectively solve the problems of fouling on the tube wall and low heat exchange efficiency during the heat exchange process between unclean water and clean water , to achieve efficient heat exchange between unclean water and clean water.

In order to solve the problems of the technologies described above, the present invention has two technical solutions.

The first technical solution of the enhanced descaling type heat exchange device of the present invention is that it includes a first non-clean water pipeline 1, a second non-clean water pipeline 2, a first clean water pipeline 3, a second Clean the water pipeline 4, the first heat exchanger 5 and the second heat exchanger 6, and the enhanced descaling type heat exchange device also includes an electric reversing valve 7; the valve of the electric reversing valve 7 A dirty water inlet 8 and two dirty water outlets 9 communicated with the inner cavity of the valve body 13 are provided on the side wall of the body 13, and the two dirty water outlets 9 are arranged on the electric reversing valve 7 on the same center line, and two unclean water outlets 9 are arranged symmetrically with respect to the center of the electric reversing valve 7, and the unclean water inlet 8 of the electric reversing valve 7 is arranged on the electric reversing valve 7 The center line of the center line and the unclean water outlet 9 are set at an interval of 90°; the unclean water inlet 8 of the electric reversing valve 7 is connected with the main pipeline 10 of the unclean water inlet; the two unclean water inlets of the electric reversing valve 7 One of the unclean water outlets 9 in the water outlets 9 communicates with the unclean water inlet of the first heat exchanger 5 through the first unclean water pipeline 1, and one of the two unclean water outlets 9 of the electric reversing valve 7 The remaining unclean water outlet 9 communicates with the unclean water inlet of the second heat exchanger 6 through the second unclean water pipeline 2, and the unclean water outlet of the first heat exchanger 5 communicates with the unclean water outlet of the second heat exchanger 6. After the clean water outlet is connected in parallel, it communicates with the unclean water outlet main pipeline 11; When one of the unclean water outlets 9 is in the same position, the unclean water inlet 8 of the electric reversing valve 7 is not connected to the remaining one of the two unclean water outlets 9 of the electric reversing valve 7; When the valve plate 18 of the electric reversing valve 7 is rotated to a position where the unclean water inlet 8 and the one of the two unclean water outlets 9 of the electric reversing valve 7 do not communicate with each other, The unclean water inlet 8 of the electric reversing valve 7 communicates with the remaining one of the two unclean water outlets 9 of the electric reversing valve 7; the first clean water pipeline The 3 inlet is connected in parallel with the 4 inlet of the second clean water pipeline and then communicated with the clean water inlet main pipeline 12, the outlet of the first clean water pipeline 3 is connected with the clean water inlet of the first heat exchanger 5, and the second clean water pipeline The outlet of 4 is connected with the clean water inlet of the second heat exchanger 6, and the clean water outlet of the first heat exchanger 5 is connected in parallel with the clean water outlet of the second heat exchanger 6 and communicated with the clean water outlet main pipeline 20.

For the electric reversing valve 7 in the first technical solution, the preferred solution is: the electric reversing valve 7 includes a valve body 13, a rotating shaft 14, a motor 15, a coupling 16, and two valve covers 17 , two valve plates 18 and two bearings 19; the valve body 13 is a cylinder with a cavity, and the two ends of the valve body 13 are detachably sealed with the two valve covers 17; the centers of the two valve covers 17 are respectively A shaft hole is provided, and bearings 19 are installed in the shaft hole. The two ends of the rotating shaft 14 are rotated and installed on the two valve covers 17 through two bearings 19. One end of the rotating shaft 14 protrudes from the outside of the valve cover 17 and out of the valve cover 17. The end of the rotating shaft 14 is connected with the output shaft of the motor 15 through a coupling 16, and the two valve plates 18 are arranged symmetrically with respect to the central axis of the rotating shaft 14 and fixedly connected with the side walls of the rotating shaft 14, and the two valve plates 18 connect the valve body 13 The lumen is divided into two.

The working principle of the first technical solution of an enhanced descaling type heat exchange device of the present invention will be described with reference to FIG. 1 , FIG. 3 and FIG. 4 . Unclean water enters the valve chamber of the electric reversing valve 7 through the main unclean water inlet pipeline 10 and the unclean water inlet 8 of the electric reversing valve 7, and the motor 15 of the electric reversing valve 7 works to drive The valve plate 18 rotates, when the valve plate 18 of the electric reversing valve 7 rotates to the unclean water inlet 8 and one of the two unclean water outlets 9 of the electric reversing valve 7 When the position is not connected, the unclean water inlet 8 of the electric reversing valve 7 communicates with the remaining one of the two unclean water outlets 9 of the electric reversing valve 7; The clean water starts to enter the second heat exchanger 6 from the remaining unclean water outlet 9 and performs countercurrent convective heat exchange with the clean water entering the second heat exchanger 6 . When the valve plate 18 of the electric reversing valve 7 is rotated to the position where the unclean water inlet 8 communicates with one of the unclean water outlets 9 of the electric reversing valve 7, the electric The unclean water inlet 8 of the rotary reversing valve 7 is not communicated with the remaining one of the two unclean water outlets 9 of the electric reversing valve 7; One of the unclean water outlets 9 mentioned above enters the first heat exchanger 5 and performs countercurrent convective heat exchange with the clean water entering the first heat exchanger 5 . In this way, the unclean water flow entering the first heat exchanger 5 and the second heat exchanger 6 is respectively disturbed by the valve plate 18 in the two electric reversing valves 7 to form a pulsating water flow, and the pulsating water flow can effectively remove heat from the heat exchanger. The dirt in the inner non-clean water side pipe can maintain the high-efficiency heat exchange of the heat exchanger. The non-clean hydration after heat exchange is combined into one outflow. The prerequisite for the unclean water to enter the electric reversing valve 7 is that the flow and velocity of the unclean water are uniform and stable.

The second technical solution of the enhanced descaling type heat exchange device of the present invention is that it includes a first non-clean water pipeline 1, a second non-clean water pipeline 2, a first clean water pipeline 3, a second To clean the water pipeline 4 , the first heat exchanger 5 and the second heat exchanger 6 , the enhanced descaling type heat exchange device also includes two electric reversing valves 7 .

A dirty water inlet 8 and a dirty water outlet 9 communicated with the inner chamber of the valve body 13 are provided on the side wall of the valve body 13 of each electric reversing valve 7, and the dirty water inlet 8 and unclean water outlet 9 are all arranged on the center line of electric reversing valve 7, and unclean water inlet 8 and unclean water outlet 9 are set at intervals of 90°; the unclean water of two electric reversing valves 7 The inlet 8 is connected in parallel with the main unclean water inlet pipe 10; the clean water outlet 9 of one of the two electric reversing valves 7 is connected to the first reversing valve 7 through the first unclean water pipe 1. The unclean water inlet of the heater 5 is connected, and the remaining electric reversing valve 7 of the two electric reversing valves 7 communicates with the unclean water inlet of the second heat exchanger 6 through the second unclean water pipeline 2. The unclean water outlet of the first heat exchanger 5 is connected in parallel with the unclean water outlet of the second heat exchanger 6 and communicates with the unclean water outlet main pipeline 11; when one of the two electric reversing valves 7 is reversing When the valve plate 18 of the valve 7 is rotated to the position where the unclean water inlet 8 of one of the electric reversing valves 7 communicates with the unclean water outlet 9, the remaining electric reversing valve 7 of the two electric reversing valves 7 The valve plate 18 rotates to the non-clean water inlet 8 of the remaining electric reversing valve 7 and the unclean water outlet 9 does not communicate with each other; when one of the two electric reversing valves 7 is reversing When the valve plate 18 of the valve 7 rotates to the position where the unclean water inlet 8 and the unclean water outlet 9 of one of the electric reversing valves 7 do not communicate, the remaining one of the two electric reversing valves 7 will The valve plate 18 of the reversing valve 7 rotates to the position where the unclean water inlet 8 of the remaining electric reversing valve 7 communicates with the unclean water outlet 9; the first clean water pipeline 3 inlet and the second clean water The inlets of the sub-pipelines 4 are connected in parallel with the clean water inlet main pipeline 12, the outlet of the first clean water pipeline 3 is connected with the clean water inlet of the first heat exchanger 5, and the outlet of the second clean water pipeline 4 is connected with the second heat exchanger The clean water inlet of the heat exchanger 6 is connected, and the clean water outlet of the first heat exchanger 5 is connected in parallel with the clean water outlet of the second heat exchanger 6 to communicate with the clean water outlet main pipeline 20.

For the electric reversing valve 7 in the second technical solution, the preferred solution is: the electric reversing valve 7 includes a valve body 13, a rotating shaft 14, a motor 15, a coupling 16, and two valve covers 17 , two valve plates 18 and two bearings 19; the valve body 13 is a cylinder with a cavity, and the two ends of the valve body 13 are detachably sealed with the two valve covers 17; the centers of the two valve covers 17 are respectively A shaft hole is provided, and bearings 19 are installed in the shaft hole. The two ends of the rotating shaft 14 are rotated and installed on the two valve covers 17 through two bearings 19. One end of the rotating shaft 14 protrudes from the outside of the valve cover 17 and out of the valve cover 17. The end of the rotating shaft 14 is connected with the output shaft of the motor 15 through a coupling 16, and the two valve plates 18 are arranged symmetrically with respect to the central axis of the rotating shaft 14 and fixedly connected with the side walls of the rotating shaft 14, and the two valve plates 18 connect the valve body 13 The lumen is divided into two.

The working principle of the second technical solution of an enhanced descaling type heat exchange device of the present invention is described with reference to FIG. 2 , FIG. 5 and FIG. 6 . The unclean water enters the two electric reversing valves 7 through the unclean water inlet pipe 10 divided into two routes, the unclean water inlet 8 of the reversing valve 7 . The opening and closing of the two electric reversing valves 7 are performed alternately, and one of the electric reversing valves 7 is opened while the other is in a closed state. The unclean water flowing out through the unclean water outlet 9 of the electric reversing valve 7 enters the first heat exchanger 5 and the second heat exchanger 6 respectively. At the same time, the clean water enters the first heat exchanger 5 and the second heat exchanger 6 through the clean water inlet main pipe 12 in two ways, and the clean water and the unclean water flow in the first heat exchanger 5 and the second heat exchanger 6 In the convective heat exchange, the two streams of unclean water after the heat exchange are one stream of unclean water and two streams of clean water flow out of the heat exchanger respectively. The unclean water flow entering the first heat exchanger 5 and the second heat exchanger 6 is respectively disturbed by the valve plate 18 in the two electric reversing valves 7 to form a pulsating water flow, which can effectively remove the dirty water in the heat exchanger. The dirt in the non-clean water side pipe can maintain the efficient heat transfer of the heat exchanger.

Compared with the prior art, the present invention has the following beneficial effects.

1. Unclean water is disturbed by the valve plate in the electric reversing valve to form a pulsating water flow. The pulsating water flow can effectively remove the dirt in the side pipe of the non-clean water in the heat exchanger, thereby maintaining the high-efficiency heat exchange of the heat exchanger. Solve the problems of fouling and low heat exchange efficiency in the heat exchange process between unclean water and clean water, and increase the heat exchange efficiency by 30%~35%.

2. The device has simple structure, strong working reliability and easy maintenance and operation. The online anti-scaling and enhanced heat exchange technology can keep the heat exchange equipment in a high-efficiency heat exchange state, increasing the energy saving of the system.

3. The first technical solution uses an electric reversing valve to control whether the two non-clean water outlets are connected to the non-clean water inlet. The electric reversing valve of this technical solution is large in size, but the control is simple; the second This technical scheme is provided with two electric reversing valves, and each electric reversing valve controls whether a dirty water outlet and a dirty water inlet are communicated or not. The electric reversing valve of this technical scheme The volume is smaller than that of the first technical solution, which is convenient for construction, installation and arrangement, but the control is relatively complicated. The two solutions have their own advantages and disadvantages, but both can effectively solve the problems of fouling and low heat transfer efficiency in the heat exchange process between unclean water and clean water, and can be reasonably selected according to specific situations.

Description of drawings

Fig. 1 is a structural schematic diagram of the first technical solution of the enhanced descaling type heat exchange device of the present invention.

Fig. 2 is a structural schematic diagram of the second technical solution of the enhanced descaling type heat exchange device of the present invention.

Fig. 3 is a front view of the electric reversing valve with one unclean water inlet and two unclean water outlets.

Fig. 4 is a sectional view of A-A section in Fig. 3 .

Fig. 5 is a front view of the electric reversing valve with a dirty water inlet and a dirty water outlet.

Fig. 6 is a sectional view of the B-B section in Fig. 5 .

Note: In Figure 1 and Figure 2, the direction of the arrow on the left side of the two heat exchangers indicates the direction of flow of unclean water; the direction of the arrow on the right side of the two heat exchangers indicates the direction of flow of clean water; Figure 3 and Figure 2 The direction indicated by the arrow in 5 is the rotation direction of the rotating shaft; in order to clearly express the internal structure of the electric rotary reversing valve, the motor, coupling, valve cover and bearing on the side of the motor are not shown in Fig. 1 and Fig. 2 .

The names and labels of parts and components in each accompanying drawing are as follows.

The first non-clean water pipeline 1, the second dirty water pipeline 2, the first clean water pipeline 3, the second clean water pipeline 4, the first heat exchanger 5, the second heat exchanger 6, the electric return Diverting valve 7, unclean water inlet 8, unclean water outlet 9, unclean water inlet main pipeline 10, unclean water outlet main pipeline 11, clean water inlet main pipeline 12, valve body 13, rotating shaft 14, motor 15. Coupling 16, valve cover 17, valve plate 18, bearing 19, clean water outlet main pipeline 20.

detailed description

Specific Embodiment 1: As shown in Fig. 1, Fig. 3 and Fig. 4, this embodiment is the first technical solution of an enhanced descaling type heat exchange device, which includes a first non-clean water pipeline 1, a second The non-clean water pipeline 2, the first clean water pipeline 3, the second clean water pipeline 4, the first heat exchanger 5 and the second heat exchanger 6, and the enhanced descaling type heat exchange device also includes electric Turn back diverter valve 7. The side wall of the valve body 13 of the electric reversing valve 7 is provided with a non-clean water inlet 8 and two non-clean water outlets 9 communicating with the inner cavity of the valve body 13, and the two non-clean water The clean water outlet 9 is arranged on the same centerline of the electric reversing valve 7, and the two unclean water outlets 9 are arranged symmetrically with respect to the center of the electric reversing valve 7, and the non-cleaning of the electric reversing valve 7 The water inlet 8 is set on the center line of the electric reversing valve 7 and is set at an interval of 90° from the unclean water outlet 9; the unclean water inlet 8 of the electric reversing valve 7 is connected to the main pipeline 10 of the unclean water inlet; One of the two unclean water outlets 9 of the electric reversing valve 7 communicates with the unclean water inlet of the first heat exchanger 5 through the first unclean water pipeline 1, and the electric reversing valve The remaining one of the two unclean water outlets 9 of 7 communicates with the unclean water inlet of the second heat exchanger 6 through the second unclean water pipeline 2, and the unclean water of the first heat exchanger 5 The water outlet is connected in parallel with the unclean water outlet of the second heat exchanger 6 and communicates with the unclean water outlet main pipeline 11; When one of the two unclean water outlets 9 of 7 is in the same position, the unclean water inlet 8 of the electric reversing valve 7 and the two unclean water outlets 9 of the electric reversing valve 7 The remaining one of the unclean water outlets 9 is not connected; when the valve plate 18 of the electric reversing valve 7 turns to the unclean water inlet 8 and the other two unclean water outlets 9 of the electric reversing valve 7 When one unclean water outlet 9 is not in the same position, the unclean water inlet 8 of the electric rotary reversing valve 7 and the remaining unclean water outlet 9 of the two unclean water outlets 9 of the electric reversing valve 7 communicated; the first clean water pipeline 3 inlets are connected in parallel with the second clean water pipeline 4 inlets and communicate with the clean water inlet main pipeline 12, and the first clean water pipeline 3 outlets are connected with the first heat exchanger 5 The clean water inlet is connected, the second clean water pipeline 4 outlet is connected with the clean water inlet of the second heat exchanger 6, and the clean water outlet of the first heat exchanger 5 is connected with the clean water outlet of the second heat exchanger 6 in parallel. The clean water outlet main pipeline 20 is connected. The two heat exchangers used in this embodiment are existing equipment.

When the valve plate 18 of the electric reversing valve 7 rotates to the middle of the unclean water inlet 8, at this moment, the unclean water inlet 8 communicates with the two unclean water outlets 9 instantaneously.

Specific embodiment 2: As shown in Fig. 1, Fig. 3 and Fig. 4, the enhanced descaling type heat exchange device described in specific embodiment 1, the electric reversing valve 7 includes a valve body 13 and a rotating shaft 14 , motor 15, coupling 16, two valve covers 17, two valve plates 18 and two bearings 19; the two valve plates 18 are straight plates, and the valve body 13 is a cylinder with a cavity Body, the two ends of the valve body 13 and the two bonnets 17 are detachably sealed and connected by random bolts and gaskets; the centers of the two bonnets 17 are respectively equipped with shaft holes, and bearings 19 are installed in the shaft holes, and the two ends of the rotating shaft 14 Rotate and be installed on two valve covers 17 by two bearings 19, one end of rotating shaft 14 stretches out of valve cover 17, and the end of rotating shaft 14 that stretches out of valve cover 17 is connected with the output shaft of motor 15 by coupling 16, The two valve plates 18 are arranged symmetrically with respect to the central axis of the rotating shaft 14 and are fixedly connected to the side wall of the rotating shaft 14 by welding. Two non-clean water inlet chambers. In this embodiment, an electric reversing valve 7 controls whether the two unclean water outlets 9 communicate with the unclean water inlet 8. The electric reversing valve has a large volume but is simple to control. Unclean water is disturbed by the valve plate in the electric reversing valve to form a pulsating water flow. The pulsating water flow can effectively remove the dirt in the unclean water side pipe in the heat exchanger, thereby maintaining the efficient heat transfer of the heat exchanger. The device has advanced design, reliable principle, simple structure, strong reliability and easy maintenance and operation. This embodiment is a preferred solution of the electric rotary reversing valve 7 in the first embodiment.

Specific embodiment three: as shown in Fig. 2, Fig. 5 and Fig. 6, this embodiment is the second technical solution of the above-mentioned enhanced descaling type heat exchange device, which includes the first non-clean water pipeline 1 , the second non-clean water pipeline 2, the first clean water pipeline 3, the second clean water pipeline 4, the first heat exchanger 5 and the second heat exchanger 6, the described enhanced descaling type heat exchange device It also includes two electric reversing valves 7; the side wall of the valve body 13 of each electric reversing valve 7 is provided with a non-clean water inlet 8 and a non-clean water inlet 8 communicated with the inner cavity of the valve body 13. The water outlet 9, the unclean water inlet 8 and the unclean water outlet 9 are all arranged on the center line of the electric rotary reversing valve 7, and the unclean water inlet 8 and the unclean water outlet 9 are arranged at an interval of 90°; The unclean water inlet 8 of two electric reversing valves 7 is connected in parallel with the main pipeline 10 of unclean water inlet; the unclean water outlet 9 of one of the two electric reversing valves 7 passes through The first unclean water pipeline 1 communicates with the unclean water inlet of the first heat exchanger 5, and the remaining one of the two electric reversing valves 7 passes through the second unclean water pipeline 2 and the second The unclean water inlet of the heat exchanger 6 is communicated, and the unclean water outlet of the first heat exchanger 5 is connected in parallel with the unclean water outlet of the second heat exchanger 6 to be communicated with the unclean water outlet main pipeline 11; When the valve plate 18 of one of the electric reversing valves 7 of the reversing reversing valve 7 is turned to the position where the unclean water inlet 8 of one of the electric reversing reversing valves 7 communicates with the unclean water outlet 9, the two electric reversing reversing valves are switched. The valve plate 18 of the remaining electric reversing valve 7 of the reversing valve 7 rotates to the position where the unclean water inlet 8 and the unclean water outlet 9 of the remaining electric reversing valve 7 do not communicate; when the two electric reversing reversing When the valve plate 18 of one of the electric reversing valves 7 of the valve 7 rotates to the position where the unclean water inlet 8 and the unclean water outlet 9 of the one of the electric reversing valves 7 are not connected, the two electric reversing valves The valve plate 18 of the remaining electric reversing valve 7 of the reversing valve 7 is rotated to the position where the unclean water inlet 8 of the remaining electric reversing valve 7 communicates with the unclean water outlet 9; The inlet of a clean water pipeline 3 is connected in parallel with the inlet of the second clean water pipeline 4 and then communicated with the main clean water inlet pipeline 12, the outlet of the first clean water pipeline 3 is connected with the clean water inlet of the first heat exchanger 5, and the first clean water pipeline 3 is connected with the clean water inlet of the first heat exchanger 5 The outlet of the second clean water pipeline 4 is connected with the clean water inlet of the second heat exchanger 6, and the clean water outlet of the first heat exchanger 5 is connected with the clean water outlet of the second heat exchanger 6 in parallel with the clean water outlet main pipeline 20 connected.

Embodiment 4: As shown in Fig. 2, Fig. 5 and Fig. 6, the enhanced descaling type heat exchange device described in Embodiment 3, the electric reversing valve 7 includes a valve body 13 and a rotating shaft 14 , motor 15, coupling 16, two valve covers 17, two valve plates 18 and two bearings 19; the two valve plates 18 are straight plates, and the valve body 13 is a cylinder with a cavity Body, the two ends of the valve body 13 and the two bonnets 17 are detachably sealed and connected by random bolts and gaskets; the centers of the two bonnets 17 are respectively equipped with shaft holes, and bearings 19 are installed in the shaft holes, and the two ends of the rotating shaft 14 Rotate and be installed on two valve covers 17 by two bearings 19, one end of rotating shaft 14 stretches out of valve cover 17, and the end of rotating shaft 14 that stretches out of valve cover 17 is connected with the output shaft of motor 15 by coupling 16, The two valve plates 18 are arranged symmetrically with respect to the central axis of the rotating shaft 14 and are fixedly connected with the side wall of the rotating shaft 14 by welding process. Two non-clean water inlet chambers. This embodiment is provided with two electric reversing valves, and each electric reversing valve controls whether a dirty water outlet on it is connected to a dirty water inlet, and the volume of the electric reversing valve is relatively large. The first technical solution is small and convenient for construction, installation and arrangement, but the control is relatively complicated. Unclean water is disturbed by the valve plate in the electric reversing valve to form a pulsating water flow. The pulsating water flow can effectively remove the dirt in the unclean water side pipe in the heat exchanger, thereby maintaining the high-efficiency heat exchange of the heat exchanger. The device has advanced design, reliable principle, simple structure, strong reliability and easy maintenance and operation. This embodiment is a preferred solution of the electric rotary reversing valve 7 in the third embodiment.

Claims (4)

1. a reinforced scavenging type heat-exchanger rig, it comprises the first non-clean moisture pipeline (1), the second non-clean moisture pipeline (2), the first clean water branch pipeline (3), the second clean water branch pipeline (4), First Heat Exchanger (5) and the second heat exchanger (6), it is characterized in that: described reinforced scavenging type heat-exchanger rig also comprises motoring reversal valve (7);

Valve body (13) sidewall of described motoring reversal valve (7) is provided with the non-clean water inlet (8) and two non-clean water outs (9) that communicate with described valve body (13) inner chamber, two described non-clean water outs (9) are arranged on the same center line of motoring reversal valve (7), and two non-clean water outs (9) are arranged relative to motoring reversal valve (7) Central Symmetry, on the center line that the non-clean water inlet (8) of described motoring reversal valve (7) is arranged on motoring reversal valve (7) and and 90 °, non-clean water out (9) interval arrange, non-clean water inlet (8) and the non-clean water of motoring reversal valve (7) main line (10) of intaking is communicated with, a non-clean water out (9) in two non-clean water outs (9) of motoring reversal valve (7) is communicated with the non-clean water inlet of First Heat Exchanger (5) by the first non-clean moisture pipeline (1), the non-clean water out of the remaining next one (9) in two non-clean water outs (9) of motoring reversal valve (7) is communicated with the non-clean water inlet of the second heat exchanger (6) by the second non-clean moisture pipeline (2), the non-clean water out of First Heat Exchanger (5) is communicated with non-clean water water outlet main pipe road (11) with after the non-clean water out parallel connection of the second heat exchanger (6), when the valve plate (18) of motoring reversal valve (7) turn to non-clean water inlet (8) to communicate with one of them the non-clean water out (9) in two non-clean water outs (9) of motoring reversal valve (7) position time, the non-clean water inlet (8) of motoring reversal valve (7) does not communicate with the non-clean water out of the remaining next one (9) in two non-clean water outs (9) of motoring reversal valve (7), when the valve plate (18) of motoring reversal valve (7) turn to non-clean water inlet (8) and the non-clean water out (9) of the described one in two non-clean water outs (9) of motoring reversal valve (7) do not communicate position time, the non-clean water inlet (8) of motoring reversal valve (7) communicates with the described non-clean water out of the remaining next one (9) in two non-clean water outs (9) of motoring reversal valve (7), the first described clean water branch pipeline (3) import is communicated with main line (12) of intaking with clean water after the second clean water branch pipeline (4) inlet parallel, the clean water inlet communication of the first clean water branch pipeline (3) outlet and First Heat Exchanger (5), second clean water branch pipeline (4) outlet and the clean water inlet communication of the second heat exchanger (6), be communicated with clean water water outlet main pipe road (20) after the clean water outlet of First Heat Exchanger (5) and the clean water of the second heat exchanger (6) export parallel connection.

2. a kind of reinforced scavenging type heat-exchanger rig according to claim 1, is characterized in that: described motoring reversal valve (7) comprises valve body (13), rotating shaft (14), motor (15), shaft coupling (16), two valve gaps (17), two valve plates (18) and two bearings (19), described valve body (13) is for having the cylinder of cavity, and the two ends of valve body (13) are connected with two valve gap (17) removable seals, two valve gap (17) centers are respectively equipped with axis hole, bearing (19) is installed in axis hole, the two ends of rotating shaft (14) are rotatably installed on two valve gaps (17) by two bearings (19), valve gap (17) outside is stretched out in one end of rotating shaft (14), stretch out outside rotating shaft (14) end of valve gap (17) to be connected with the output shaft of motor (15) by shaft coupling (16), two valve plates (18) are symmetrical arranged relative to the central axis of rotating shaft (14) and affixed with rotating shaft (14) sidewall, valve body (13) inner chamber is divided into two by two valve plates (18).

3. a reinforced scavenging type heat-exchanger rig, it comprises the first non-clean moisture pipeline (1), the second non-clean moisture pipeline (2), the first clean water branch pipeline (3), the second clean water branch pipeline (4), First Heat Exchanger (5) and the second heat exchanger (6), it is characterized in that: described reinforced scavenging type heat-exchanger rig also comprises two motoring reversal valves (7);

Valve body (13) sidewall of each motoring reversal valve (7) is equipped with the non-clean water inlet (8) and a non-clean water out (9) that communicate with described valve body (13) inner chamber, described non-clean water inlet (8) and non-clean water out (9) are all arranged on the center line of motoring reversal valve (7), and non-clean water inlet (8) and the setting of 90 °, non-clean water out (9) interval, main line (10) of intaking with non-clean water after non-clean water inlet (8) parallel connection of two motoring reversal valves (7) is communicated with, the non-clean water out (9) of one of them motoring reversal valve (7) of two motoring reversal valves (7) is communicated with the non-clean water inlet of First Heat Exchanger (5) by the first non-clean moisture pipeline (1), two remaining next motoring reversal valves (7) of motoring reversal valve (7) are communicated with the non-clean water inlet of the second heat exchanger (6) by the second non-clean moisture pipeline (2), the non-clean water out of First Heat Exchanger (5) is communicated with non-clean water water outlet main pipe road (11) with after the non-clean water out parallel connection of the second heat exchanger (6), when the non-clean water inlet (8) that the valve plate (18) of one of them motoring reversal valve (7) of two motoring reversal valves (7) turns to this one of them motoring reversal valve (7) communicates position with non-clean water out (9), the non-clean water inlet (8) that the valve plate (18) of the remaining next motoring reversal valve (7) of two motoring reversal valves (7) turns to this remaining next motoring reversal valve (7) and non-clean water out (9) do not communicate position, when the non-clean water inlet (8) that the valve plate (18) of one of them described motoring reversal valve (7) of two motoring reversal valves (7) turns to this one of them motoring reversal valve (7) and non-clean water out (9) do not communicate position, the non-clean water inlet (8) that the valve plate (18) of the described remaining next motoring reversal valve (7) of two motoring reversal valves (7) turns to this remaining next motoring reversal valve (7) communicates with non-clean water out (9) position, the first described clean water branch pipeline (3) import is communicated with main line (12) of intaking with clean water after the second clean water branch pipeline (4) inlet parallel, the clean water inlet communication of the first clean water branch pipeline (3) outlet and First Heat Exchanger (5), second clean water branch pipeline (4) outlet and the clean water inlet communication of the second heat exchanger (6), be communicated with clean water water outlet main pipe road (20) after the clean water outlet of First Heat Exchanger (5) and the clean water of the second heat exchanger (6) export parallel connection.

4. a kind of reinforced scavenging type heat-exchanger rig according to claim 3, is characterized in that: described motoring reversal valve (7) comprises valve body (13), rotating shaft (14), motor (15), shaft coupling (16), two valve gaps (17), two valve plates (18) and two bearings (19), described valve body (13) is for having the cylinder of cavity, and the two ends of valve body (13) are connected with two valve gap (17) removable seals, two valve gap (17) centers are respectively equipped with axis hole, bearing (19) is installed in axis hole, the two ends of rotating shaft (14) are rotatably installed on two valve gaps (17) by two bearings (19), valve gap (17) outside is stretched out in one end of rotating shaft (14), stretch out outside rotating shaft (14) end of valve gap (17) to be connected with the output shaft of motor (15) by shaft coupling (16), two valve plates (18) are symmetrical arranged relative to the central axis of rotating shaft (14) and affixed with rotating shaft (14) sidewall, valve body (13) inner chamber is divided into two by two valve plates (18).