Steam hydrophobic metering device and system

Abstract

The steam hydrophobic metering device comprises a box body, a heat exchange assembly and a condensate water output pipe, the box body comprises a water tank part and a heat exchange part, the heat exchange part is located above the water tank part and communicated with the water tank part, the water tank part is provided with a hydrophobic inlet end and a condensate water outlet end, and the heat exchange assembly is installed on the heat exchange part. The heat exchange assembly is used for condensing steam entering from the drain water inlet end, the condensate water output pipe is connected to the condensate water outlet end, and a flow meter is installed on the condensate water output pipe. The device is used for evaluating energy-saving benefit indexes of the steam trap, operation is simple, convenient and rapid, quantitative analysis basis is provided for model selection and evaluation of the steam trap, and the problem of effect evaluation of the steam trap is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam trap measurement, in particular to a steam trap metering device and a system. Background Art

[0002] Steam systems play a very important role in the production of industrial enterprises. If the condensed water in the steam system is not discharged in time, it is very easy to cause water hammer and there is a risk of pipe bursting. In on-site steam operation, the opening of the stop valve is often controlled, and the condensed water is discharged along with the steam, resulting in a waste of steam energy.

[0003] In order to reduce the energy waste of steam trapping, steam traps are often used to block steam and drain water to discharge condensate in the steam system, while at the same time preventing steam leakage to the greatest extent possible.

[0004] However, when it comes to evaluating the steam-blocking and water-draining effect of steam traps, there are difficulties in measuring the steam-blocking and energy-saving effect of steam traps, which makes the selection and evaluation of steam traps lack basis and needs to be solved urgently. Utility Model Content

[0005] The present application provides a steam trap metering device and system, which solves the technical problem of difficult steam trap effect evaluation in the prior art.

[0006] The present application provides a steam trap metering device, comprising a casing, a heat exchange assembly and a condensate output pipe, wherein the casing comprises a water tank portion and a heat exchange portion, wherein the heat exchange portion is located above the water tank portion and are interconnected, wherein the water tank portion is provided with a trap inlet end and a condensate outlet end, wherein the heat exchange assembly is installed on the heat exchange portion, wherein the heat exchange assembly is used to condense steam entering from the trap inlet end, wherein the condensate output pipe is connected to the condensate outlet end, and wherein a flow meter is installed on the condensate output pipe.

[0007] In some embodiments, the heat exchange assembly includes a plurality of heat exchange tubes, a first head and a second head, the plurality of heat exchange tubes are inserted through the heat exchange portion, the first head and the second head are fixedly mounted outside the heat exchange portion, one end of the plurality of heat exchange tubes are connected to the inner cavity of the first head, and the other end are connected to the inner cavity of the second head, the first head is provided with a cooling water inlet end, and the second head is provided with a cooling water outlet end, and the cooling water inlet end is used to input external cooling water.

[0008] In some embodiments, the steam drain metering device is further provided with a baffle, which is vertically installed in the water tank portion, and the upper end of the baffle is close to the heat exchange portion. The inner cavity of the water tank portion is divided into a first sub-chamber and a second sub-chamber by the baffle, the drain inlet end is adjacent to the first sub-chamber, and the condensate outlet end is adjacent to the second sub-chamber, and a plurality of first drainage holes are opened at the bottom of the baffle, and the first drainage holes connect the first sub-chamber and the second sub-chamber.

[0009] In some embodiments, the steam drain metering device also includes a baffle, which is fixedly installed on the heat exchange part to form a baffle channel in the space outside the heat exchange tube of the heat exchange part, the inlet of the baffle channel is connected to the first sub-chamber, the inlet of the baffle channel is close to the drain inlet end, and the outlet of the baffle channel is connected to the second sub-chamber; a plurality of second drainage holes are opened at the bottom of the baffle to allow condensed water in the baffle channel to fall into the first sub-chamber.

[0010] In some embodiments, the first seal is close to the outlet of the baffle channel, and the second seal is close to the inlet of the baffle channel.

[0011] In some embodiments, the drain inlet and the condensate outlet are arranged on opposite sides of the casing, the cooling water inlet and the condensate outlet are located on the same side of the casing, and the cooling water outlet and the drain inlet are located on the same side of the casing.

[0012] In some embodiments, the steam trap metering device further includes a control valve, which is installed on the condensate output pipe and has an adjustable opening.

[0013] In some embodiments, the heat exchange tube is fixed to the wall of the heat exchange part by welding or expansion.

[0014] In some embodiments, the first head and the second head are connected to the heat exchange portion by bolts.

[0015] A steam trap metering system comprises a second device and the above-mentioned steam trap metering device, wherein the second device comprises a second water tank and a second condensate output pipe, the top of the second water tank is open, the second water tank is provided with a second trap inlet end and a second condensate outlet end, the second trap inlet end is used to connect a trap valve to be tested, the second condensate output pipe is connected to the second condensate outlet end, and a second flow meter and a second control valve are installed on the second condensate output pipe.

[0016] The beneficial effects of the present application are as follows: a steam drain metering device is provided, comprising a box body, a heat exchange component and a condensate output pipe, a water tank portion and a heat exchange component are arranged in a water tank, both of which are in the form of a box body, the heat exchange component is located above the water tank portion, and the water tank portion and the heat exchange component are interconnected, a drain inlet end and a condensate outlet end are arranged in the water tank portion, the condensate output pipe is connected to the condensate outlet end, a flow meter is installed in the condensate output pipe, and a heat exchange component is installed in the heat exchange component, and the steam entering from the drain inlet end is condensed by the heat exchange component; during the test, the plan is divided into two parts; one part connects the drain inlet end of the device with the drain The outlet of the water valve is connected, and the flowmeter starts to measure the condensed water Q1 flowing through it within the specified test time t; in the other part, the steam trap inlet of the device is connected to the stop valve without a steam trap, and the flowmeter measures the condensed water Q2 flowing through it within the same test time t when the steam trap is controlled only by the stop valve; thus, Q2-Q1 is calculated as the energy-saving steam volume of the steam trap, and (Q2-Q1) / Q2 is calculated as the energy-saving efficiency of the steam trap, providing an energy-saving benefit evaluation index; the use of this device to evaluate the energy-saving benefit of the steam trap is simple and quick to operate, providing a quantitative analysis basis for the selection and evaluation of the steam trap, and solving the problem of steam trap effect evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model.

[0018] Figure 1 A schematic diagram of the structure of a steam trap metering device provided in this application;

[0019] Figure 2 A cross-sectional schematic diagram of a steam trap metering device provided in the present application;

[0020] Figure 3 A schematic diagram of the operation of a steam trap metering device provided in this application;

[0021] Figure 4 A schematic diagram of the structure of a second device in a steam trap metering system provided in the present application;

[0022] Figure 5 A cross-sectional schematic diagram of a second device in a steam trap metering system provided in the present application.

[0023] Figures: 10-steam drain metering device, 100-box, 110-water tank, 111-drain inlet, 112-condensate outlet, 113-baffle, 113a-first sub-chamber, 113b-second sub-chamber, 113c-first drain hole, 120-heat exchange part, 200-heat exchange assembly, 210-heat exchange tube, 220-first head, 221-cooling water inlet, 230-second head, 231- Cooling water outlet end, 300-condensate output pipe, 310-flow meter, 320-control valve, 400-baffle, 410-inlet of baffle channel, 420-outlet of baffle channel, 430-second drain hole, 20-second equipment, 21-second water tank, 21a-second drain inlet end, 21b-second condensate outlet end, 22-second condensate output pipe, 22a-second flow meter, 22b-second control valve. DETAILED DESCRIPTION

[0024] Regarding the evaluation of the steam-blocking and water-draining effect of the steam trap, it is necessary to measure the steam-blocking and energy-saving effect of the steam trap and the steam leakage of the steam trap.

[0025] Example 1

[0026] Please refer to Figure 1 and Figure 2 This embodiment provides a steam trap metering device 10, including a box body 100, a heat exchange component 200 and a condensate output pipe 300.

[0027] The housing 100 includes a water tank portion 110 and a heat exchange portion 120. The heat exchange portion 120 is located above the water tank portion 110, and the water tank portion 110 and the heat exchange portion 120 are connected to each other. The water tank portion 110 is provided with a drain inlet 111 and a condensate outlet 112. The heat exchange assembly 200 is installed on the heat exchange portion 120, and the steam entering from the drain inlet 111 is condensed through the heat exchange assembly 200. The condensate output pipe 300 is connected to the condensate outlet 112, and a flow meter 310 is installed on the condensate output pipe 300.

[0028] During the testing, the experimental plan was divided into two parts.

[0029] When conducting a part of the test, the steam trap inlet 111 of the device is connected to the steam trap outlet, and the condensed water from the steam trap carries the steam into the water tank 110, and the steam rises to the heat exchange part 120 and liquefies. The condensed water formed by liquefaction is combined with the original condensed water and discharged from the condensed water output pipe 300. The fluid path in the relevant process can be referred to Figure 3 The arrow in shows that the condensed water Q1 flowing through the flow meter 310 starts to be measured within the prescribed test time t.

[0030] When conducting another part of the test, the drain inlet 111 of the device is connected to a stop valve without a drain valve, and the condensate Q2 flowing through the flow meter 310 is measured within an equal test time t when the drain is controlled only by the stop valve.

[0031] Thus, data Q1 and Q2 are obtained, Q2-Q1 is used as the steam volume of the steam trap energy saving, and (Q2-Q1) / Q2 is used as the energy saving efficiency of the steam trap, which provides an energy saving benefit evaluation index.

[0032] As mentioned above, the energy-saving benefit evaluation index of the steam trap is carried out through this device, which is easy and quick to operate, provides a quantitative analysis basis for the selection and evaluation of the steam trap, and solves the problem of steam trap effect evaluation.

[0033] In some embodiments, see Figure 2 The heat exchange assembly 200 includes a plurality of heat exchange tubes 210, a first end cap 220, and a second end cap 230. The plurality of heat exchange tubes 210 are arranged in the heat exchange part 120, the first end cap 220 and the second end cap 230 are both fixedly mounted outside the heat exchange part 120, one end of the plurality of heat exchange tubes 210 are in communication with the inner cavity of the first end cap 220, and the other end of the plurality of heat exchange tubes 210 are in communication with the inner cavity of the second end cap 230, the first end cap 220 is provided with a cooling water inlet end 221, and the second end cap 230 is provided with a cooling water outlet end 231, and the cooling water inlet end 221 is used to input external cooling water.

[0034] When the steam trap outlet is connected to the trap inlet 111 of the water tank 110, a flange connection is generally selected, and the trap enters the water tank along with the steam. After the trap enters the water tank 110 along with the steam, the volume instantly increases and the pressure decreases, reducing the effect of the back pressure on the action of the trap, and the steam and water are separated in the water tank. The condensed water falls to the lower part of the water tank 110, and the steam rising to the heat exchanger exchanges heat with the heat exchange tube 210, and the steam liquefies to form condensed water, which falls into the water tank 110.

[0035] Regarding the arrangement of the plurality of heat exchange tubes 210 in the heat exchange portion 120 , a parallel arrangement is generally adopted, specifically a multi-layer and multi-row arrangement.

[0036] In some embodiments, see Figure 2The steam trap metering device 10 is further provided with a baffle 113, which is vertically installed in the water tank portion 110, and the upper end of the baffle 113 is close to the heat exchange portion 120. The inner cavity of the water tank portion 110 is divided into a first sub-chamber 113a and a second sub-chamber 113b by the baffle 113. The trap inlet end 111 is adjacent to the first sub-chamber 113a, and the condensate outlet end 112 is adjacent to the second sub-chamber 113b. A plurality of first drainage holes 113c are provided at the bottom of the baffle 113, and the first drainage holes 113c are connected to the first sub-chamber 113a and the second sub-chamber 113b. By providing the baffle 113, the steam entering from the trap inlet end 111 can all rise and can all pass through the heat exchange portion 120 for heat exchange and condensation. The condensed water flows smoothly along the first drain hole 113c at the bottom of the baffle 113 to the condensed water outlet end 112. Moreover, the liquid level in the vertical portion is higher than the first drain hole 113c, so that the condensed water submerges the first drain hole 113c, ensuring that all the steam flows to the heat exchange portion 120, which is conducive to the formation of the steam heat exchange airflow.

[0037] In some embodiments, the steam trap metering device 10 further includes a baffle 400. Figure 2 The baffle plate 400 is fixedly mounted on the heat exchange part 120 to form a baffle channel in the space of the heat exchange part 120 except the heat exchange tube 210. The baffle channel improves the condensation effect of the steam, and the baffle channel has an inlet and an outlet. Figure 2 As shown, the inlet 410 of the baffle channel is communicated with the first sub-chamber 113a, and the inlet 410 of the baffle channel is close to the drain inlet end 111, while the outlet 420 of the baffle channel is communicated with the second sub-chamber 113b. The steam entering from the drain inlet end 111 rises to the inlet 410 of the baffle channel, exchanges heat with the heat exchange tube 210 while moving along the baffle channel, and liquefies to form condensed water.

[0038] like Figure 2 As shown, a plurality of second drainage holes 430 are provided at the bottom of the baffle plate 400 so that the condensed water in the baffle channel can fall into the first sub-chamber 113a.

[0039] The baffle plate 400 also plays a role in supporting the heat exchange tube 210 .

[0040] In some embodiments, see Figure 2, the first end cap 220 is close to the outlet 420 of the baffle channel, and the second end cap 230 is close to the inlet 410 of the baffle channel. In relation to the heat exchange tube 210, cooling water enters from the cooling water inlet end 221 of the first end cap 220 and is output from the second end cap 230 along the heat exchange tube 210; in relation to steam, steam enters the baffle channel from one side of the second end cap 230 and moves roughly toward the first end cap 220. This creates an effect in which cooling water and steam flow in opposite directions in the heat exchange part 120 housing 100, with condensed water flowing through the tube side and steam flowing through the shell side. The outer wall temperature of the heat exchange tube 210 at the cooling water inlet is the lowest, and the steam pressure is lower than that at the cooling water outlet, forming a pressure differential airflow, which is beneficial to the drainage and cooling of steam.

[0041] In some embodiments, please refer to Figure 1 and Figure 2 The drain inlet 111 and the condensate outlet 112 are arranged on opposite sides of the housing 100, while the cooling water inlet 221 and the condensate outlet 112 are located on the same side of the housing 100, and the cooling water outlet 231 and the drain inlet 111 are located on the same side of the housing 100, which is suitable for the specific scheme that the housing 100 is a cube.

[0042] In some embodiments, see Figure 1 and Figure 2 The steam trap metering device 10 further includes a control valve 320, which is installed on the condensate output pipe 300 and can adjust the opening of the control valve 320. By adjusting the control valve 320, the water level of the water tank is submerged above the first drain hole 113c at the bottom of the baffle 113.

[0043] The opening of the control valve 320 is controlled according to the liquid level in the water tank, and the outlet pipe is fully discharged to ensure accurate measurement by the flow meter 310.

[0044] In some embodiments, the heat exchange tube 210 is fixed to the wall of the heat exchange part 120 by welding or expansion connection.

[0045] In some embodiments, the first head 220 and the second head 230 are connected to the heat exchange portion 120 by bolts.

[0046] In some embodiments, the first head 220 and the second head 230 are in the shape of a water collecting box.

[0047] Example 2

[0048] This embodiment provides a steam trap metering system, including a second device 20 and the steam trap metering device 10 of Embodiment 1. By applying this system, the steam leakage amount and leakage rate of the steam trap are obtained.

[0049] Please refer to Figure 4 and Figure 5The second device 20 includes a second water tank 21 and a second condensate output pipe 22. The top of the second water tank 21 is open. The second water tank 21 is provided with a second drain inlet 21a and a second condensate outlet 21b. The second drain inlet 21a is used to connect the drain valve to be tested. The second condensate output pipe 22 is connected to the second condensate outlet 21b. A second flow meter 22a and a second control valve 22b are installed on the second condensate output pipe 22.

[0050] The specific application process of this system includes two parts of tests as in Example 1 to obtain data Q1 and Q2. In addition, the following test is also used: the second device 20 is connected to the outlet of the steam trap, and after adjusting the opening of the second control valve 22b, the condensed water Q3 flowing through the flow meter 310 within the same test time t is measured. This step is reflected in that only the condensed water at the outlet of the steam trap is measured, and the accompanying steam volatilization is not measured.

[0051] After obtaining data Q1 and Q3, Q1-Q3 is used as the steam leakage of the steam trap, and (Q1-Q3) / Q1 is used as the steam leakage rate of the steam trap, providing an energy-saving benefit evaluation index.

[0052] Example 3

[0053] This embodiment provides a metering method for a steam trap metering device, applying the steam trap metering system of Embodiment 2, and involving the steam trap metering device 10 of Embodiment 1, which is fully described below.

[0054] Step S1, connect the cooling water inlet 221 and the cooling water outlet 231 of the metering device to external cooling water, and adjust the cooling water temperature and water pressure according to the steam heat exchange cooling effect to ensure that no condensed steam is discharged from the condensate outlet 112.

[0055] Step S2, the condensate outlet end 112 is connected to the flow meter 310 and the control valve 320, the opening of the control valve 320 is controlled according to the liquid level of the water tank part 110, and the condensate output pipe 300 is fully discharged to ensure accurate measurement by the flow meter 310.

[0056] Step S3, connect the drain inlet 111 of the metering device to the drain valve outlet, adjust the door opening of the control valve 320, and start measuring the condensed water Q1 flowing through the flow meter 310 within the specified test time t.

[0057] Step S4, connecting the drain inlet 111 of the metering device to the stop valve without a drain valve, and measuring the condensed water Q2 flowing through the flow meter 310 within an equal test time t when the drain is controlled only by the stop valve.

[0058] Step S5, connect the second drain inlet 21a of the second device 20 to the drain valve outlet, adjust the opening of the control valve 320, and measure the condensed water Q3 flowing through the flow meter 310 within the same test time t. This step only measures the condensed water at the drain valve outlet, and does not measure the accompanying steam volatilization.

[0059] Step S6, after measuring the three flow rates Q1, Q2, and Q3, the energy-saving steam volume of the steam trap is calculated as Q2-Q1, and the energy-saving efficiency is (Q2-Q1) / Q2 as the energy-saving benefit evaluation index, and the steam leakage volume of the steam trap is calculated as Q1-Q3, and the leakage rate is (Q1-Q3) / Q1 as the evaluation index of the steam leakage volume of the steam trap.

[0060] To ensure that the measurement data is more scientific, more points can be selected and the test time can be extended.

[0061] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0062] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A steam trap metering device, characterized in that: include: The box body comprises a water tank part and a heat exchange part, wherein the heat exchange part is located above the water tank part and is interconnected, and the water tank part is provided with a drain inlet end and a condensed water outlet end; A heat exchange component installed in the heat exchange part, the heat exchange component is used to condense the steam entering from the drain inlet end; The condensate output pipe is connected to the condensate outlet end, and a flow meter is installed on the condensate output pipe.

2. The steam trap metering device according to claim 1, characterized in that: The heat exchange assembly includes a plurality of heat exchange tubes, a first head and a second head. The plurality of heat exchange tubes are inserted through the heat exchange part. The first head and the second head are fixedly installed outside the heat exchange part. One ends of the plurality of heat exchange tubes are connected to the inner cavity of the first head, and the other ends are connected to the inner cavity of the second head. The first head is provided with a cooling water inlet end, and the second head is provided with a cooling water outlet end. The cooling water inlet end is used to input external cooling water.

3. The steam trap metering device according to claim 2, characterized in that: The steam drain metering device is also provided with a baffle, which is vertically installed in the water tank part, and the upper end of the baffle is close to the heat exchange part. The inner cavity of the water tank part is divided into a first sub-chamber and a second sub-chamber by the baffle, the drain inlet end is adjacent to the first sub-chamber, and the condensate outlet end is adjacent to the second sub-chamber. A plurality of first drainage holes are opened at the bottom of the baffle, and the first drainage holes connect the first sub-chamber and the second sub-chamber.

4. The steam trap metering device according to claim 3, characterized in that: The steam drain metering device further comprises a baffle, which is fixedly mounted on the heat exchange part to form a baffle channel in the space of the heat exchange part except the heat exchange tube, the inlet of the baffle channel is communicated with the first sub-chamber, the inlet of the baffle channel is close to the drain inlet end, and the outlet of the baffle channel is communicated with the second sub-chamber; A plurality of second drainage holes are provided at the bottom of the baffle plate so that condensed water in the baffle channel can fall into the first sub-chamber.

5. The steam trap metering device according to claim 4, characterized in that: The first end cap is close to the outlet of the deflection channel, and the second end cap is close to the inlet of the deflection channel.

6. The steam trap metering device according to claim 5, characterized in that: The drain inlet and the condensate outlet are arranged on opposite sides of the box body, the cooling water inlet and the condensate outlet are located on the same side of the box body, and the cooling water outlet and the drain inlet are located on the same side of the box body.

7. The steam trap metering device according to any one of claims 1 to 6, characterized in that: The steam trap metering device also includes a control valve, which is installed on the condensate output pipe and has an adjustable opening.

8. The steam trap metering device according to claim 2, characterized in that: The heat exchange tube is fixed to the box wall of the heat exchange part by welding or expansion connection.

9. The steam trap metering device according to claim 2, characterized in that: The first end cover and the second end cover are connected to the heat exchange part by bolts.

10. A steam trap metering system, characterized in that: A steam trap metering device comprising a second device and any one of claims 1 to 9; The second equipment includes a second water tank and a second condensate output pipe. The top of the second water tank is open. The second water tank is provided with a second drain inlet and a second condensate outlet. The second drain inlet is used to connect the drain valve to be tested. The second condensate output pipe is connected to the second condensate outlet. A second flow meter and a second control valve are installed on the second condensate output pipe.

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