Paper machine broken end emptying steam recovery device

Abstract

The utility model discloses a broken end emptying steam recovery device for a paper machine, which belongs to the field of papermaking and comprises a barrel body, the barrel body is in a horizontal column shape, the lower end of the barrel body is installed and fixed through a saddle type support, the interior of the barrel body is divided into a plurality of areas by a plurality of rotational flow breaking baffles along the direction of the barrel body, and the areas are connected in series to form a plurality of water storage barrels; steam and demineralized water inlet pipelines are arranged in the water storage cylinder, a plurality of steam flow equalizing pipes are arranged on the two sides of each steam pipeline, and after steam enters the water storage cylinder, the temperature of water in the water storage cylinder is gradually increased; the steam pipeline is supported by the plurality of rotational flow breaking baffles, and the plurality of steam release pipes are supported by the bracket; the steam recovery device is reasonable in structural design, capable of receiving a large amount of irregularly coming steam, safe, reliable, free of pressure building and water attack, controllable in hot water flow and temperature after steam absorption, free of additional water supplement during recovery, capable of reducing the use amount of desalted water and capable of effectively utilizing heat of recovered exhaust steam.

Description

Technical Field

[0001] The utility model belongs to the field of steam recovery in papermaking, and in particular relates to a paper machine end-of-end venting steam recovery device, which can realize the functions of steam heat energy and working medium recovery. Background Art

[0002] In paper mills, due to the papermaking process, once the paper machine production line breaks, steam consumption stops. The boiler cannot instantly reduce the heat load, and can only exhaust steam to the air through the heat network exhaust system, resulting in significant waste. Therefore, a solution to this existing problem is urgently needed. Utility Model Content

[0003] The purpose of the utility model is to provide a paper machine end-break venting steam recovery device, which can realize the recovery of the exhaust steam heat energy and working fluid when the paper machine production line stops using steam due to paper break, can accept a large amount of irregular steam, and has low construction cost.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a paper machine end-break venting steam recovery device, comprising: a cylinder, the cylinder being in a horizontal cylindrical shape, the lower end of which is mounted and fixed by a saddle-type support, the interior of the cylinder being divided into a plurality of areas along the cylinder direction by a plurality of cyclone-breaking baffles, each area being connected in series to form a plurality of water storage cylinders;

[0005] There are steam and desalted water entering the water storage cylinder, and there are several steam equalizing pipes on both sides of the steam pipe. After the steam enters, the temperature of the water inside the water storage cylinder gradually increases;

[0006] The steam pipe is supported by the plurality of swirl-breaking baffles, and the plurality of steam release pipes are supported by brackets;

[0007] The cylinder body contains a liquid level stabilizing baffle to prevent false reporting of the liquid level.

[0008] Preferably, a water pump is installed on the water outlet pipe at the bottom of the cylinder.

[0009] As a preference, the interior of the cylinder is divided into several areas along the cylinder direction by several cyclone-breaking baffles, each area is connected in series to form several water storage cylinders, and the water storage cylinders are equipped with liquid level gauges and thermometers.

[0010] Preferably, the plurality of water storage cylinders are connected at the bottom and the top.

[0011] Preferably, the steam pipe and the steam release pipe are connected.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The structure is reasonably designed and can accept a large amount of irregular steam. The device is safe and reliable without pressure buildup or water hammer. The flow rate and temperature of hot water after absorbing steam are controllable. No additional water is required during recovery, which reduces the use of desalted water and allows the heat of recovered exhaust steam to be effectively utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall structure diagram of the utility model.

[0015] In the figure: 1. Cylinder; 2. Liquid level stabilizing baffle; 3. Inspection port; 4. Top exhaust port; 5. Drain port; 6. Steam inlet; 7. Cold demineralized water inlet; 8. Demineralized water circulation inlet; 9. Steam equalizing pipe; 10. Bracket; 11. Steam inlet main pipe; 12. Cyclone-breaking baffle; 13. Drain valve; 14. Discharge port; 15. Circulating pump; 16. Liquid level control valve; 17. Temperature control valve; 18. Plate heat exchanger; 19. Demineralized water inlet; 20. Demineralized water outlet. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1 The utility model provides a technical solution: a paper machine end-break venting steam recovery device, comprising a cylinder 1, a liquid level stabilizing baffle 2 is provided inside the cylinder 1, an inspection port 3 is provided on the upper part of the cylinder 1, a top steam exhaust port 4 is provided on the upper part of the cylinder 1, the top steam exhaust port 4 is communicated with the cavity of the cylinder 1, a sewage outlet 5 is provided on the lower part of the cylinder 1, a sewage valve 13 is provided below the sewage outlet 5, a steam inlet 6 is provided on the upper part of the cylinder 1, the steam inlet 6 is connected to the steam intake pipe 11, the steam intake pipe 11 is connected to the steam equalizing pipe 9, the bracket 10 supports the steam equalizing pipe 9, the cylinder 1 A cold desalted water inlet 7 is provided at the upper part, and a temperature control valve 17 is provided on the cold desalted water inlet 7 pipe. A desalted water circulation inlet 8 is provided at the upper part of the cylinder 1, and the desalted water circulation inlet 8 is connected to the plate heat exchanger 18, the desalted water inlet 19 is connected to the plate heat exchanger 18, and the desalted water outlet 20 is connected to the plate heat exchanger 18. A swirl-breaking baffle 12 is provided inside the cylinder 1, and the swirl-breaking baffle 12 supports the steam inlet main pipe 11. A discharge port 14 is provided at the bottom of the cylinder 1, and the discharge port 14 is connected to the circulation pump 15. The water outlet of the circulation pump 15 is provided with a liquid level control valve 16.

[0018] The cylinder 1 initially stores nearly several cubic meters of desalted water at room temperature;

[0019] When the paper machine is shut down for the first time, exhaust steam enters the steam inlet main pipe 11 through the steam inlet 6 above the cylinder 1, and then enters the steam equalizing pipe 9 in two ways. After exiting the steam equalizing pipe 9, it enters the cylinder 1 and exchanges heat with the desalted water initially stored in the cylinder 1 at room temperature, heating the desalted water to 90°C.

[0020] During the next paper machine shutdown, the circulation pump 15 is started to send the hot desalted water in the cylinder 1 to the plate heat exchanger 18 for heat exchange with the water from the desalted water inlet 19. The desalted water after cooling enters the cylinder 1 through the desalted water circulation inlet 8. This cycle is repeated for a certain period of time until the hot desalted water in the cylinder 1 is cooled from 90°C to within 50°C. The water from the desalted water inlet 19 is heated to 50-75°C and sent to the deaerator or water user.

[0021] When the excess steam exceeds the water storage and absorption capacity of the cylinder 1 and the temperature of the desalted water in the cylinder 1 is higher than 90°C, the temperature control valve 17 on the cold desalted water inlet 7 pipe opens to replenish the normal temperature desalted water. When the liquid level in the cylinder 1 is higher than the high alarm value, the liquid level control valve 16 at the outlet of the circulating pump 15 opens to discharge the excess hot desalted water to the desalted water outlet 20.

[0022] After the above control is implemented, if there is any excess steam that is not absorbed, it will be discharged through the steam exhaust port 4 at the top of the cylinder 1 to prevent the device from being pressurized and to maximize the recovery of the exhaust medium.

[0023] In summary, the use of this paper machine end-break venting steam recovery device can not only realize the function of paper machine paper break exhaust steam discharge, but also recover the discharged working fluid heat energy, saving energy, achieving economic benefits, and solving the environmental safety problems caused by heat emissions.

[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A paper machine end-break venting steam recovery device, characterized in that: The invention comprises a cylinder (1), a desalted water inlet (19) and a desalted water outlet (20); a liquid level stabilizing baffle (2) and a steam inlet main pipe (11) are provided inside the cylinder (1); an inspection port (3) is provided on the upper portion of the cylinder (1); a top steam exhaust port (4) is provided on the upper portion of the cylinder (1); and the top steam exhaust port (4) is communicated with the cavity of the cylinder (1); A sewage outlet (5) is provided at the lower portion of the cylinder (1), and a sewage valve (13) is provided at the lower portion of the sewage outlet (5); The upper portion of the cylinder (1) is provided with a steam inlet (6), the steam inlet (6) is connected to a steam inlet main pipe (11), both sides of the steam inlet main pipe (11) are connected to steam equalizing pipes (9), the bottom of the steam equalizing pipe (9) is connected to a bracket (10), and the bottom of the bracket (10) is connected to the inner wall of the cylinder (1); A cold desalted water inlet (7) is provided on the upper portion of the cylinder (1), a temperature control valve (17) is provided on the cold desalted water inlet (7) pipe, and the cold desalted water inlet (7) is communicated with the desalted water inlet (19); A desalted water circulation inlet (8) is provided at the upper portion of the cylinder (1), the other end of the desalted water circulation inlet (8) is connected to a plate heat exchanger (18), the desalted water inlet (19) is connected to the plate heat exchanger (18), and the desalted water outlet (20) is connected to the plate heat exchanger (18); A swirl-breaking baffle (12) is provided inside the cylinder (1), and the swirl-breaking baffle (12) supports the steam inlet main pipe (11); A discharge port (14) is provided below the cylinder (1), and the discharge port (14) is connected to a circulation pump (15). The discharge port (14) pipeline is connected to a desalted water circulation inlet (8) and a desalted water outlet (20) through a tee pipe, and a liquid level control valve (16) is provided between the discharge port (14) pipeline and the desalted water outlet (20) pipeline.

2. The paper machine end-break venting steam recovery device according to claim 1, characterized in that: The cylinder (1) is in a horizontal column shape, and the lower end of the cylinder (1) is installed and fixed via a saddle-type support.

3. The paper machine end-break venting steam recovery device according to claim 1, characterized in that: The interior of the cylinder (1) is divided into several areas along the cylinder direction by several cyclone-breaking baffles, and each area is connected in series to form several water storage cylinders, in which a liquid level meter and a thermometer are installed.

4. The paper machine end-break venting steam recovery device according to claim 3, characterized in that: The bottoms of the plurality of water storage cylinders are connected, and the tops are also connected.

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