Hot gas recycling system

Abstract

The utility model discloses a hot gas recycling system which is used for recycling heat generated by a turbine vacuum pump and reducing the situation of thermal pollution. The device comprises a turbine vacuum pump, an exhaust pipe and a conveying pipe, an air inlet and an air outlet are formed in the turbine vacuum pump, the air inlet is connected with the steam-water separator, the exhaust pipe is connected to the air outlet, and the turbine vacuum pump is used for providing vacuum adsorption force for the steam-water separator; one end of the conveying pipe is connected with the exhaust pipe, the other end of the conveying pipe extends to be connected with a paper machine drying part, and the conveying pipe is used for being matched with the exhaust pipe to convey hot air generated by the turbine vacuum pump into the paper machine drying part.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of heat recycling, in particular to a heat recycling system. BACKGROUND

[0002] The turbo vacuum pump is a core component in a pulp conveying system, which can efficiently convey the pulp from one processing area to another and maintain a specific running state. The turbo vacuum pump has controllable air flow and negative pressure, which can effectively control the viscosity and flowability of the pulp and ensure the smooth progress of the key process steps. During the paper forming process, the turbo vacuum pump tightly adheres the pulp to the mold surface through strong air suction capacity, so that the water in the pulp can be quickly and completely absorbed, and the paper is quickly formed.

[0003] However, during actual use, the turbo vacuum pump of the paper mill produces a large amount of high-temperature hot air. The hot air is directly discharged from the fan outlet to the atmosphere, and the temperature can reach 95 DEG C, and the air volume can reach 29700 m 3 / h. This direct discharge method not only causes a large amount of renewable heat energy to be wasted, but also increases the energy consumption cost of the enterprise, and also causes certain heat pollution to the environment.

[0004] Based on the above, the application provides a heat recycling system to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the above technical problems, the application provides a heat recycling system, which can recycle the heat generated by the turbo vacuum pump and reduce heat pollution.

[0006] The heat recycling system provided by the application comprises:

[0007] The turbo vacuum pump, the exhaust pipe and the conveying pipe; the turbo vacuum pump is provided with an air inlet and an air outlet, the air inlet is connected with a steam-water separator, the exhaust pipe is connected to the air outlet, and the turbo vacuum pump is used to provide a vacuum adsorption force to the steam-water separator; one end of the conveying pipe is connected with the exhaust pipe, and the other end is extended and connected with a paper machine drying part, and the conveying pipe is used to cooperate with the exhaust pipe to convey the hot air generated by the turbo vacuum pump into the paper machine drying part.

[0008] Optionally, the connection position of the exhaust pipe and the conveying pipe is provided with a silencer, and the two ends of the silencer are respectively communicated with the exhaust pipe and the conveying pipe.

[0009] Optionally, the silencer comprises an inner pipe, an outer pipe and silencing cotton, the outer pipe is sleeved outside the inner pipe, the silencing cotton is arranged in the interlayer between the inner pipe and the outer pipe, and a plurality of perforations are formed in the inner pipe.

[0010] Optionally, a plurality of air outlet structures are arranged on one end of the conveying pipe extending into the paper machine drying section, and the air outlet structures are detachably connected with the conveying pipe.

[0011] Optionally, the air outlet structure comprises a threaded pipe and an oblong nozzle, one end of the threaded pipe is connected with the conveying pipe, the other end is connected with the oblong nozzle, and the oblong nozzle faces the paper machine drying section.

[0012] Optionally, the heat recovery system further comprises a pipe network arranged at the bottom of the paper machine drying section, the pipe network is connected with the conveying pipe, and a plurality of through holes are arranged on the pipe network.

[0013] Optionally, the exhaust pipe is wrapped with a heat preservation layer outside the conveying pipe.

[0014] Optionally, the exhaust pipe and the conveying pipe are connected through a flange plate, and a sealing gasket is arranged in the flange plate.

[0015] Optionally, the exhaust pipe and the conveying pipe are connected through a run adjustment device, an extension pipe is arranged on the run adjustment device, and the run adjustment device is used for controlling the run of the hot gas in the exhaust pipe.

[0016] From the above technical solutions, the present application has the following effects:

[0017] The present application adds a conveying pipe to the exhaust pipe of the turbine vacuum pump, extends one end of the conveying pipe to be connected with the paper machine drying section, introduces the hot gas generated by the turbine vacuum pump into the paper machine drying section through the conveying pipe during the operation of the turbine vacuum pump, and dries the paper by using the heat of the hot gas, thereby effectively utilizing the heat resource, recycling the heat generated by the turbine vacuum pump, and reducing the situation of directly discharging the hot gas into the air to cause thermal pollution. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 FIG. 1 is a schematic diagram of a heat recovery system provided by the present application;

[0020] Figure 2 FIG. 2 is another schematic diagram of a heat recovery system provided by the present application;

[0021] Figure 3 A schematic diagram of a muffler in a heat recovery system provided by the present application is shown in FIG. 1.

[0022] Figure 4 A schematic diagram of an air outlet structure in a heat recovery system provided by the present application is shown in FIG. 2.

[0023] Figure 5 A schematic diagram of a pipe network in a heat recovery system provided by the present application is shown in FIG. 3.

[0024] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings, and are used only to describe the relative positional relationship between the components or constituent parts, and do not particularly limit the specific installation orientation of the components or constituent parts. DETAILED DESCRIPTION

[0025] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings, and are used only to describe the relative positional relationship between the components or constituent parts, and do not particularly limit the specific installation orientation of the components or constituent parts.

[0026] In addition, the terms "mounting", "provision", "provisioned", "connection", "connected" can be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two devices, elements or constituent parts. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In addition, the terms "mounting", "provision", "provisioned", "connection", "connected" can be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two devices, elements or constituent parts. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In addition, the structure, proportion, size and the like drawn in the drawings attached in the present application are only used for matching the disclosed content in the specification, for the understanding and reading of the person skilled in the art, and do not have technical substantial significance, and any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect and the purpose that can be achieved by the present application, still falls within the scope of the disclosed technical content.

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] The present application provides a heat recovery system for recovering the heat generated by a turbo vacuum pump and reducing heat pollution.

[0031] Referring to Figures 1 to 5 The heat recovery system provided by the present application comprises:

[0032] The turbo vacuum pump 01, the exhaust pipe 02 and the conveying pipe 03; the turbo vacuum pump 01 is provided with an air inlet 04 and an air outlet 05, the air inlet 04 is connected with a steam-water separator 06, the exhaust pipe 02 is connected to the air outlet 05, and the turbo vacuum pump 01 is used to provide a vacuum adsorption force to the steam-water separator 06; one end of the conveying pipe 03 is connected with the exhaust pipe 02, and the other end extends to be connected with a paper machine drying part 07, and the conveying pipe 03 is used to cooperate with the exhaust pipe 02 to convey the hot air generated by the turbo vacuum pump 01 into the paper machine drying part 07.

[0033] The turbo vacuum pump 01 generates negative pressure (vacuum adsorption force) through internal mechanical movement, and is used to extract and transport gas or steam mixture. The turbo vacuum pump 01 is provided with an air inlet 04 and an air outlet 05, the air inlet 04 is used to connect the steam-water separator 06, and the air outlet 05 is connected with the exhaust pipe 02. When the turbo vacuum pump 01 works, the internal blade or rotor rotates rapidly, the gas in the steam-water separator 06 connected with the air inlet 04 is sucked and discharged to the air outlet 05 through mechanical compression, and a negative pressure area is formed at the same time.

[0034] The steam-water separator 06 is used to separate water from steam, to ensure that the gas entering the turbo vacuum pump 01 is relatively dry. The turbo vacuum pump 01 cooperates with the steam-water separator 06 to form continuous negative pressure extraction.

[0035] In the operation of the turbine vacuum pump 01, the hot gas generated is discharged from the gas outlet 05 to the exhaust pipe 02, which is responsible for guiding the hot gas discharged from the turbine vacuum pump 01 to the delivery pipe 03.

[0036] One end of the delivery pipe 03 is connected to the exhaust pipe 02, and the other end extends to the paper machine drying section 07. The delivery pipe 03 functions to deliver the hot gas in the exhaust pipe 02 to the paper machine drying section 07, so as to dry the paper in the paper machine drying section 07.

[0037] The steam generated in the paper machine compression section 08 enters the steam-water separator 06, and after separation treatment, the dry gas enters the turbine vacuum pump 01. The turbine vacuum pump 01 extracts the gas in the steam-water separator 06 through its gas inlet 04, forms a negative pressure environment, and discharges the hot gas containing a certain temperature and energy through the gas outlet 05. The discharged hot gas enters the delivery pipe 03 through the exhaust pipe 02 and is delivered to the paper machine drying section 07 along the delivery pipe 03. In the paper machine drying section 07, the hot gas directly participates in the drying process of the paper as a heat source, improves the drying efficiency, and realizes the recycling of heat energy. By recycling the hot gas generated by the turbine vacuum pump 01, energy consumption and waste gas emission are reduced.

[0038] In an alternative embodiment, a silencer 09 is provided at the connection position of the exhaust pipe 02 and the delivery pipe 03.

[0039] In this alternative embodiment, the silencer 09 is composed of an inner pipe 10, an outer pipe 11 and silencing cotton 12. The outer pipe 11 is tightly sleeved outside the inner pipe 10, and the silencing cotton 12 is filled in the interlayer between the inner pipe 10 and the outer pipe 11. The inner pipe 10 is provided with a plurality of perforations.

[0040] During the exhaust process of the turbine vacuum pump 01, due to the rapid flow of gas and the change of pressure, a certain amount of noise will be generated. If not treated, these noises can be directly transmitted to the surrounding environment through the exhaust pipe 02. Therefore, in this embodiment, a silencer 09 is added at the connection position of the exhaust pipe 02 and the delivery pipe 03 to reduce the noise generated during the exhaust process of the turbine vacuum pump 01. One end of the silencer 09 is connected to the exhaust pipe 02, and the other end is connected to the delivery pipe 03.

[0041] The silencer 09 is composed of an inner pipe 10, an outer pipe 11 and silencing cotton 12. The outer pipe 11 is tightly sleeved outside the inner pipe 10, and the silencing cotton 12 is filled in the interlayer between the inner pipe 10 and the outer pipe 11. The inner pipe 10 is provided with a plurality of perforations, which allow the hot gas to disperse into the silencing cotton 12 during use, thereby reducing the propagation of noise.

[0042] When the hot gas enters the muffler 09 through the exhaust pipe 02, it first contacts the perforations on the inner pipe 10, and the hot gas can pass through the perforations and disperse into the interlayer between the inner pipe 10 and the outer pipe 11, fully contacting the sound-absorbing cotton 12; the sound-absorbing cotton 12 is a kind of porous sound-absorbing material with good sound-absorbing performance. When the hot gas passes through the sound-absorbing cotton 12, the sound wave energy carried by the hot gas is absorbed by the sound-absorbing cotton 12, thereby reducing the intensity of the noise.

[0043] In an optional embodiment, the end of the delivery pipe 03 extending into the paper machine drying section 07 is provided with a plurality of gas outlet structures 05, which are detachably connected with the delivery pipe 03.

[0044] In this embodiment, the gas outlet structure 05 is connected with the delivery pipe 03 by means of threaded connection, buckle connection, bolt connection, etc. By arranging a plurality of gas outlet structures 05 at a certain distance from each other, the plurality of gas outlet structures 05 cover multiple positions in the paper machine drying section 07, facilitating the rapid distribution of hot gas in the paper machine drying section 07 and enabling the temperature in the paper machine drying section 07 to quickly reach the expected value.

[0045] In this optional embodiment, the specific structure of the gas outlet structure 05 includes a threaded pipe 14 and an oblong nozzle 15. One end of the threaded pipe 14 is connected with the delivery pipe 03, and the other end is connected with the oblong nozzle 15, which faces the paper machine drying section 07.

[0046] One end of the threaded pipe 14 is provided with a thread, which is screwed with the delivery pipe 03, and the other end is integrally connected with the oblong nozzle 15, i.e., the threaded pipe 14 and the oblong nozzle 15 form an integral whole. The hot gas is transmitted from the delivery pipe 03 to the threaded pipe 14, and then flows through the oblong nozzle 15 to be sprayed into the paper machine drying section 07.

[0047] The outlet area of the oblong nozzle 15 is large, so it can release hot gas to a large area in the paper machine drying section 07 at the same time, thereby improving the efficiency of full coverage of hot gas.

[0048] In this optional embodiment, the hot gas recycling system further includes a pipe network 16, which is arranged at the bottom of the paper machine drying section 07 and is connected with the delivery pipe 03. The pipe network 16 is provided with a plurality of through holes.

[0049] To distribute the hot gas more quickly into the paper machine drying section 07, a pipe network 16 is arranged at the bottom of the paper machine drying section 07, which is in communication with the delivery pipe 03. The hot gas in the delivery pipe 03 flows into the pipe network 16, and the pipe network 16 is provided with a plurality of through holes, so that the hot gas flows into the paper machine drying section 07 through the through holes. Since the pipe network 16 covers the bottom of the paper machine drying section 07, it can achieve the effect of rapid distribution of hot gas, improve the efficiency of full coverage of hot gas, and improve the temperature rising rate of the paper machine drying section 07.

[0050] In an alternative embodiment, the exhaust pipe 02 and the conveying pipe 03 are wrapped with a thermal insulation layer outside. In this embodiment, in order to avoid heat loss of the hot gas and to avoid the situation that the conveying pipe 03 and the exhaust pipe 02 scald the workers, the thermal insulation layer is wrapped outside the exhaust pipe 02 and the conveying pipe 03, and the thermal insulation layer is composed of thermal insulation cotton which is fixed on the exhaust pipe 02 and the conveying pipe 03 by iron wires. In addition, by setting the thermal insulation layer, the noise can be further limited.

[0051] In an alternative embodiment, the exhaust pipe 02 and the conveying pipe 03 are connected through the flange plate 17, and the sealing gasket is arranged in the flange plate 17.

[0052] In this embodiment, the flange plate 17 is arranged at the end of the original exhaust pipe 02, and the flange plate 17 is also arranged at the end of the conveying pipe 03, the two flange plates 17 contact with each other and are connected through the bolts, so as to realize the mutual connection of the exhaust pipe 02 and the conveying pipe 03; in order to avoid the leakage of the hot gas at the connection, the sealing gasket is additionally arranged between the two flange plates 17, so as to block the risk between the two flange plates 17.

[0053] In an alternative embodiment, the exhaust pipe 02 and the conveying pipe 03 are connected through the direction regulator 18, and the extension pipe 19 is arranged on the direction regulator 18, and the direction regulator 18 is used for controlling the direction of the hot gas in the exhaust pipe 02.

[0054] The direction regulator 18 is provided with one gas inlet 04 and two gas outlets 05, the gas inlet 04 is connected with the exhaust pipe 02, one gas outlet 05 is connected with the conveying pipe 03, and the other gas outlet 05 is introduced into the air through the pipeline, in actual use, the valve in the direction regulator 18 can be controlled to control which gas outlet 05 discharges (discharges to the air or discharges into the conveying pipe 03).

[0055] It should be noted that the above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat recovery utilization system characterized by, The utility model relates to a heat recovery and utilization system of paper machine drying section, including: A turbine vacuum pump, an exhaust pipe and a conveying pipe; The turbine vacuum pump is provided with an air inlet and an air outlet, the air inlet is connected with a steam-water separator, the exhaust pipe is connected on the air outlet, and the turbine vacuum pump is used for providing vacuum adsorption force to the steam-water separator; one end of the conveying pipe is connected with the exhaust pipe, and the other end extends and is connected with a paper machine drying section, and the conveying pipe is used for cooperating with the exhaust pipe to convey hot gas generated by the turbine vacuum pump into the paper machine drying section; The exhaust pipe and the conveying pipe are connected through a run direction regulator, the run direction regulator is provided with an extension pipe, and the run direction regulator is used for controlling the run direction of hot gas in the exhaust pipe.

2. The heat recovery utilization system according to claim 1, characterized by The connection position of the exhaust pipe and the conveying pipe is provided with a silencer, and the two ends of the silencer are communicated with the exhaust pipe and the conveying pipe respectively.

3. The heat recovery utilization system according to claim 2, characterized by The silencer is composed of an inner pipe, an outer pipe and silencing cotton, the outer pipe is sleeved outside the inner pipe, the silencing cotton is arranged in the interlayer between the inner pipe and the outer pipe, and a plurality of perforations are formed in the inner pipe.

4. The heat recovery utilization system according to any one of claims 1 to 3, characterized by, A plurality of air outlet structures are arranged on the end of the conveying pipe extending into the paper machine drying section, and the air outlet structures and the conveying pipe are detachably connected.

5. The heat recovery utilization system according to claim 4, characterized by The air outlet structure comprises a threaded pipe and an oblong nozzle, one end of the threaded pipe is connected with the conveying pipe, the other end is connected with the oblong nozzle, and the oblong nozzle faces the paper machine drying section.

6. The heat recovery utilization system according to claim 4, characterized by The heat recovery and utilization system further comprises a pipe network, the pipe network is arranged at the bottom of the paper machine drying section, the pipe network is connected with the conveying pipe, and a plurality of through holes are formed in the pipe network.

7. The heat recovery utilization system according to any one of claims 1 to 3, characterized by The exhaust pipe and the conveying pipe are wrapped with a heat preservation layer.

8. The heat recovery utilization system according to claim 1, characterized by The exhaust pipe and the conveying pipe are connected through a flange plate, and a sealing gasket is arranged in the flange plate.

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