CN219390695U - Blowdown system of plate heat exchanger - Google Patents
Blowdown system of plate heat exchanger Download PDFInfo
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- CN219390695U CN219390695U CN202222661211.2U CN202222661211U CN219390695U CN 219390695 U CN219390695 U CN 219390695U CN 202222661211 U CN202222661211 U CN 202222661211U CN 219390695 U CN219390695 U CN 219390695U
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Abstract
The utility model belongs to the technical field of heat supply operation, and particularly relates to a plate heat exchanger sewage disposal system, which comprises: the system comprises a secondary network circulating pump, a secondary network water supplementing pump, a first shut-off valve, a second shut-off valve, a first water drain valve, a second water drain valve, a primary network circulating pump, a primary network water supplementing pump, a third shut-off valve, a fourth shut-off valve, a third water drain valve, a fourth water drain valve, a heat exchanger, a primary network water supply end, a primary network water return end, a secondary network water supply end, a secondary network water return end and a drainage ditch. The plate heat exchanger blowdown system has solved the phenomenon that the plate heat exchanger blocks up and the electric energy is extravagant.
Description
Technical Field
The utility model belongs to the technical field of heat supply operation, and particularly relates to a blowdown system of a plate heat exchanger.
Background
In the operation of a heat exchange station of the existing heat supply system, the phenomena of large pressure difference between an inlet and an outlet of a plate heat exchanger and poor heat exchange effect often occur. The main reason is that the water flow of the plate heat exchanger is relatively narrow, the impurities in the heat supply circulating water are more, and after a period of operation, the scaling and blockage of the plate heat exchange plates occur to reduce the heat transfer coefficient of the plate heat exchange plates, so that the heat of the high-temperature water cannot be exchanged, and the secondary network heating effect is affected. Meanwhile, the space between the heat exchange plates is smaller after the plate heat exchanger is scaled, and under the condition of the same circulation flow, the internal resistance of the plate heat exchanger is increased, so that the waste of electric energy is caused.
For example, the Chinese patent application number is: CN202220700953.9 discloses an automatic back flushing system of a heat exchanger, which comprises a heat exchanger, an electric four-way valve and a filter valve; one side of the electric four-way valve is respectively connected with a water inlet pipeline of the heat exchanger and a water outlet pipeline of the heat exchanger, and the other side of the electric four-way valve is respectively connected with one end of the filter valve and the water inlet pipeline; the other end of the filter valve is connected with a water outlet pipeline, and an electric blow-down valve is arranged at the bottom of the filter valve; the bottom of the electric blow-down valve is connected with a blow-down pipeline; a differential pressure transmitter A is arranged between the water inlet pipeline and the water outlet pipeline of the heat exchanger; the filter valve is connected with a differential pressure transmission B in parallel; the system is also provided with a control cabinet; the electric four-way valve, the filter valve, the electric blow-down valve, the differential pressure transmitter A and the differential pressure transmitter B are respectively connected with the control cabinet. The system can avoid the blockage of the heat exchanger and maintain the heat exchange efficiency. However, an automatic back flushing system of the heat exchanger is not proposed.
For another example, chinese patent application No.: CN202123412366.4 discloses an energy-saving water heat exchanger, including casing, lower annular trachea, last annular trachea, raceway, refrigeration water tank, first spray assembly and second spray assembly, lower annular trachea and last annular trachea one side are connected with intake pipe and outlet duct respectively, and are connected with a plurality of spiral gas-supply pipes between lower annular trachea and the last annular trachea, and is a plurality of spiral gas-supply pipes are circumference evenly distributed and are down between annular trachea and the last annular trachea, casing one side is equipped with the refrigeration water tank. According to the utility model, the plurality of spiral gas delivery pipes are arranged between the lower annular gas pipe and the upper annular gas pipe, so that the air flow can be effectively cooled in a dispersed manner, and the first spray assembly and the second spray assembly are arranged, so that the plurality of spiral gas delivery pipes can be sprayed and cooled from the top end by using the first spray assembly, and meanwhile, the second spray assembly can be used for spraying and cooling the spiral gas delivery pipes from the side surface, so that the high heat exchange efficiency can be ensured. But also does not propose an automatic back flushing system for heat exchangers.
Disclosure of Invention
In order to solve the problems, the utility model provides a blowdown system of a plate heat exchanger.
The plate heat exchanger blowdown system includes: the system comprises a secondary network circulating pump, a secondary network water supplementing pump, a first shut-off valve, a second shut-off valve, a first water drain valve, a second water drain valve, a primary network circulating pump, a primary network water supplementing pump, a third shut-off valve, a fourth shut-off valve, a third water drain valve, a fourth water drain valve, a heat exchanger, a primary network water supply end, a primary network water return end, a secondary network water supply end, a secondary network water return end and a drainage ditch; the primary network water supply end, the third shut-off valve, the heat exchanger, the fourth shut-off valve, the primary network circulating pump and the primary network water return end are communicated through a pipeline to form a loop, the third shut-off valve is communicated with the heat exchanger through a third water drain valve, the fourth shut-off valve is communicated with the heat exchanger through a fourth water drain valve, and a primary network water supplementing pump is arranged between the fourth shut-off valve and the primary network circulating pump; the secondary network water supply end, the first shutoff valve, the heat exchanger, the second shutoff valve, the secondary network circulating pump and the secondary network backwater end are communicated through a pipeline to form a loop, the first shutoff valve and the heat exchanger are communicated with the drainage ditch through a first water drain valve, the second shutoff valve and the heat exchanger are communicated with the drainage ditch through a second water drain valve, and a secondary network water supplementing pump is arranged between the secondary network backwater end and the secondary network circulating pump.
Further, the heat exchanger is composed of a tube side fluid inlet, a tube side fluid outlet, a shell side fluid inlet, a shell side fluid outlet, a heat transfer tube bundle, a hollow tube cavity, filter plates, through holes, a water inlet, a water outlet and a heat exchanger tube barrel, wherein the tube side fluid inlet and the tube side fluid outlet are respectively welded at two ends of the heat exchanger tube barrel, the water inlet is arranged on the shell wall of the tube side fluid inlet and is connected with a third shut-off valve pipeline, the water outlet is arranged on the shell wall of the tube side fluid outlet and is connected with a fourth shut-off valve pipeline, 2 filter plates for separating the tube side fluid outlet, the heat exchanger tube barrel and the tube side fluid inlet are arranged at two ends of the heat exchanger tube barrel, a plurality of heat transfer tube bundles are arranged on the filter plates, the heat transfer tube bundles are fixed in the hollow tube cavity, the hollow tube cavity is arranged in the heat exchanger tube barrel, the outer wall of the heat exchanger tube barrel is provided with the shell side fluid inlet and the shell side fluid outlet, the shell side fluid inlet is communicated with the first shut-off valve through the pipeline, and the second shut-off valve through the pipeline.
Furthermore, buffer filter plates are arranged at the water inlet and the water outlet.
Further, the through holes are through holes, and the diameters of the through holes are the same.
Further, the through holes are round holes or honeycomb holes.
Further, the heat exchanger is externally provided with a bracket.
Further, the first shut-off valve, the second shut-off valve, the third shut-off valve and the fourth shut-off valve are ball valves.
Further, the first water drain valve, the second water drain valve, the third water drain valve and the fourth water drain valve are butterfly valves.
Compared with the prior art, the utility model has the following beneficial effects:
the sewage disposal system of the plate heat exchanger is characterized in that the primary net water supply and return end pipeline and the secondary net water supply and return end pipeline of the plate heat exchanger are respectively opened and are additionally provided with ball valves, the purpose of removing dirt inside the plate heat exchanger is achieved through the switch ball valves during operation, and meanwhile the phenomena of blockage and electric energy waste of the plate heat exchanger are solved.
Drawings
FIG. 1 is a schematic diagram of a blowdown system for a plate heat exchanger according to the present utility model;
FIG. 2 is a schematic cross-sectional view of the heat exchanger of FIG. 1;
FIG. 3 is a schematic view of the structure of the direction A in FIG. 2;
reference numerals illustrate: the system comprises a 1-secondary network circulating pump, a 2-secondary network water supplementing pump, a 3-first shutoff valve, a 4-second shutoff valve, a 5-first water draining valve, a 6-second water draining valve, a 7-primary network circulating pump, an 8-primary network water supplementing pump, a 9-third shutoff valve, a 10-fourth shutoff valve, an 11-third water draining valve, a 12-fourth water draining valve, a 13-heat exchanger, a 1301-tube side fluid inlet, a 1302-tube side fluid outlet, a 1303-shell side fluid inlet, a 1304-shell side fluid outlet, a 1305-heat transfer tube bundle, a 1306-hollow tube cavity, a 1307-filter plate, 1308-through holes, 1309-water inlets, 1310-water outlets, 1311-heat exchanger tubes, a 14-primary network water supplying end, a 15-primary network water returning end, a 16-secondary network water supplying end, a 17-secondary network water returning end and 18-drainage ditch.
Detailed Description
The utility model is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1-3, the plate heat exchanger blowdown system includes: the system comprises a secondary network circulating pump 1, a secondary network water supplementing pump 2, a first shutoff valve 3, a second shutoff valve 4, a first water drain valve 5, a second water drain valve 6, a primary network circulating pump 7, a primary network water supplementing pump 8, a third shutoff valve 9, a fourth shutoff valve 10, a third water drain valve 11, a fourth water drain valve 12, a heat exchanger 13, a primary network water supply end 14, a primary network water return end 15, a secondary network water supply end 16, a secondary network water return end 17 and a drainage ditch 18; the primary network water supply end 14, the third shutoff valve 9, the heat exchanger 13, the fourth shutoff valve 10, the primary network circulating pump 7 and the primary network water return end 15 are communicated through a pipeline to form a loop, the third shutoff valve 9 and the heat exchanger 13 are communicated with a drainage ditch 18 through a third water drain valve 11, the fourth shutoff valve 10 and the heat exchanger 13 are communicated with the drainage ditch 18 through a fourth water drain valve 12, and a primary network water supplementing pump 8 is arranged between the fourth shutoff valve 10 and the primary network circulating pump 7; the secondary network water supply end 16, the first shutoff valve 3, the heat exchanger 13, the second shutoff valve 4, the secondary network circulating pump 1 and the secondary network water return end 17 are communicated through a pipeline to form a loop, the first shutoff valve 3 and the heat exchanger 13 are communicated with the drainage ditch 18 through the first water drain valve 5, the second shutoff valve 4 and the heat exchanger 13 are communicated with the drainage ditch 18 through the second water drain valve 6, and the secondary network water supplementing pump 2 is arranged between the secondary network water return end 17 and the secondary network circulating pump 1.
As shown in fig. 2-3, further, the heat exchanger 13 is composed of a tube side fluid inlet 1301, a tube side fluid outlet 1302, a shell side fluid inlet 1303, a shell side fluid outlet 1304, a heat transfer tube bundle 1305, a hollow tube cavity 1306, filter plates 1307, through holes 1308, a water inlet 1309, a water outlet 1310 and a heat exchanger tube barrel 1311, wherein the tube side fluid inlet 1301 and the tube side fluid outlet 1302 are welded to two ends of the heat exchanger tube barrel 1311 respectively, the shell wall of the tube side fluid inlet 1301 is provided with the water inlet 1309, the water inlet 1309 is connected with a third shut-off valve 9 pipeline, the shell wall of the tube side fluid outlet 1302 is provided with the water outlet 1310, the water outlet 1310 is connected with a fourth shut-off valve 10 pipeline, 2 ports 1307 separating the tube side fluid outlet 1302, the heat exchanger tube barrel 1311 and the tube side fluid inlet 1301 are arranged at two ends of the heat exchanger tube barrel 1311, a plurality of heat transfer tube bundles 1308 are fixed in the hollow tube cavity 1306, the hollow tube cavity 1306 is arranged in the heat exchanger tube cavity 1306, the heat exchanger tube cavity 1308 is arranged in the shell side fluid inlet 1301, the outer wall of the heat exchanger tube shell side fluid inlet 1303 is communicated with the second fluid inlet valve 1303 through the fluid inlet port 3, and the fluid outlet port is communicated with the fluid inlet valve fluid inlet port is arranged through the fourth shut-off valve 10 pipeline.
Further, the buffer filter plates (not shown) are disposed at the water inlet 1309 and the water outlet 1310, so that turbulent fluid can be converted into parallel straight line running, and the filter plates 1307 have the same technical effects.
Further, the through holes 1308 are through holes, and the diameters of the through holes 1308 are the same.
Further, the through holes 1308 are round holes or honeycomb holes.
Further, a bracket (not shown) is provided outside the heat exchanger 13 to fix the heat exchanger 13 against tilting.
Further, the first shut-off valve 3, the second shut-off valve 4, the third shut-off valve 9 and the fourth shut-off valve 10 are ball valves.
Further, the first water drain valve 5, the second water drain valve 6, the third water drain valve 7 and the fourth water drain valve 8 are butterfly valves.
In the heating operation period of the blowdown system of the plate heat exchanger, the plate heat exchanger performs periodic blowdown, and blowdown operation comprises the following steps: secondary-side blowdown and primary-side blowdown. The specific sewage discharge process is as follows:
the secondary net side pollution discharge process is as follows:
the operation of the secondary network circulating pump 1 is suspended, the secondary network water supplementing pump 2 is kept in an operation state, and meanwhile, the pressure stability of the secondary network is ensured. Firstly, closing a butterfly valve on the water return side of the secondary net, opening a ball valve on the water return side of the secondary net after closing to carry out sewage discharge, intermittently discharging the sewage by the plate heat exchanger, wherein the opening time is about 10 seconds each time, closing and keeping for 10 seconds each time, opening and discharging for 10 seconds each time, closing again, and switching times each time are not less than 3 times. And secondly, opening a butterfly valve at the water return side of the secondary network, closing the butterfly valve at the water supply side of the secondary network, and opening a ball valve at the water supply side of the secondary network after closing to carry out sewage discharge, wherein the sewage discharge time and the sewage discharge times are similar to those of the ball valve at the water return side.
Primary net side pollution discharge process:
if the primary network is a plurality of heat exchange systems, the operation of the primary network circulating pump and the heat source can not be suspended, and if only one heat exchange system is provided, the operation of the circulating pump and the heat source can be suspended. The primary network water supplementing pump 8 is kept in an operating state, and meanwhile, the pressure stability of the primary network is ensured. Firstly, closing a butterfly valve at the water supply side of a primary network, opening a ball valve at the water supply side of the primary network after closing to carry out sewage disposal, adopting intermittent sewage disposal, wherein the time for opening each time is about 10 seconds, closing and keeping for 10 seconds, opening sewage disposal for 10 seconds, closing again, and opening and closing for at least 3 times each time. And secondly, opening a butterfly valve at the water supply side of the primary net, closing a butterfly valve at the water return side of the primary net, and opening a ball valve at the water return side of the primary net after closing to carry out sewage discharge, wherein the sewage discharge time and the sewage discharge times are similar to those of the ball valve at the water return side.
The above description is only specific embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any changes or substitutions easily come within the scope of the present utility model as those skilled in the art can easily come within the scope of the present utility model defined by the appended claims.
Claims (8)
1. A plate heat exchanger drainage, comprising: the system comprises a secondary network circulating pump, a secondary network water supplementing pump, a first shut-off valve, a second shut-off valve, a first water drain valve, a second water drain valve, a primary network circulating pump, a primary network water supplementing pump, a third shut-off valve, a fourth shut-off valve, a third water drain valve, a fourth water drain valve, a heat exchanger, a primary network water supply end, a primary network water return end, a secondary network water supply end, a secondary network water return end and a drainage ditch; the primary network water supply end, the third shut-off valve, the heat exchanger, the fourth shut-off valve, the primary network circulating pump and the primary network water return end are communicated through a pipeline to form a loop, the third shut-off valve is communicated with the heat exchanger through a third water drain valve, the fourth shut-off valve is communicated with the heat exchanger through a fourth water drain valve, and a primary network water supplementing pump is arranged between the fourth shut-off valve and the primary network circulating pump; the secondary network water supply end, the first shutoff valve, the heat exchanger, the second shutoff valve, the secondary network circulating pump and the secondary network backwater end are communicated through a pipeline to form a loop, the first shutoff valve and the heat exchanger are communicated with the drainage ditch through a first water drain valve, the second shutoff valve and the heat exchanger are communicated with the drainage ditch through a second water drain valve, and a secondary network water supplementing pump is arranged between the secondary network backwater end and the secondary network circulating pump.
2. The blowdown system of plate heat exchanger of claim 1, wherein the heat exchanger is composed of a tube side fluid inlet, a tube side fluid outlet, a shell side fluid inlet, a shell side fluid outlet, a heat transfer tube bundle, a hollow tube cavity, a filter plate, a through hole, a water inlet, a water outlet and a heat exchanger tube barrel, wherein the tube side fluid inlet and the tube side fluid outlet are welded at two ends of the heat exchanger tube barrel respectively, the water inlet is arranged on a shell wall of the tube side fluid inlet, the water inlet is connected with a third shutoff valve pipeline, the water outlet is arranged on a shell wall of the tube side fluid outlet, the water outlet is connected with a fourth shutoff valve pipeline, 2 filter plates separating the tube side fluid outlet, the heat exchanger tube barrel and the tube side fluid inlet are arranged at two ends of the heat exchanger tube barrel, a plurality of heat transfer tube bundles are fixed on the hollow tube cavity, the hollow tube cavity is arranged in the heat exchanger tube barrel, the shell side fluid inlet and the shell side fluid outlet are arranged on an outer wall of the heat exchanger tube barrel, and the shell side fluid inlet is communicated with the first shutoff valve through the shell side fluid outlet through the pipeline, and the second shutoff valve through the shell side fluid outlet.
3. A plate heat exchanger blowdown system according to claim 2, wherein buffer filter plates are provided at the water inlet and outlet.
4. A plate heat exchanger drain system according to claim 2, wherein the through holes are through holes, the diameter of the through holes being the same.
5. The plate heat exchanger blowdown system of claim 4 wherein said through holes are round holes or honeycomb holes.
6. A plate heat exchanger blowdown system according to claim 1, wherein the heat exchanger is externally provided with a bracket.
7. The plate heat exchanger blowdown system of claim 1, wherein the first shut-off valve, second shut-off valve, third shut-off valve and fourth shut-off valve are ball valves.
8. The plate heat exchanger blowdown system of claim 1, wherein the first, second, third, and fourth blowdown valves are butterfly valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222661211.2U CN219390695U (en) | 2022-10-10 | 2022-10-10 | Blowdown system of plate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222661211.2U CN219390695U (en) | 2022-10-10 | 2022-10-10 | Blowdown system of plate heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219390695U true CN219390695U (en) | 2023-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222661211.2U Active CN219390695U (en) | 2022-10-10 | 2022-10-10 | Blowdown system of plate heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219390695U (en) |
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2022
- 2022-10-10 CN CN202222661211.2U patent/CN219390695U/en active Active
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