CN213811848U

CN213811848U - Controllable low-pressure steam heating device

Info

Publication number: CN213811848U
Application number: CN202022548402.9U
Authority: CN
Inventors: 冯自平; 祁志强; 何世辉; 姜洋; 蔡红珍
Original assignee: Zibo Energy Research Institute
Current assignee: Zibo Energy Research Institute
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-07-27
Anticipated expiration: 2030-11-06

Abstract

The utility model relates to a controllable low pressure steam heating device belongs to heat energy engineering steam and utilizes technical field, press from both sides the cover including steam supply pipe and the heat exchange that sets up outside heating position and steam supply pipe are connected, be equipped with pressure control valve and temperature control valve one on the steam supply pipe, the bottom that the heat exchange pressed from both sides the cover is connected with the drain pipe, is equipped with the drain valve on the drain pipe, and the drain pipe lower extreme is connected with the suction gas device, and top one side that the heat exchange pressed from both sides the cover is equipped with vacuum pressure sensor. The utility model discloses can provide the even accurate heating of steam that has predetermined pressure and predetermined temperature through the steam supply pipe and be heated the thing, detect the vacuum state in the cover through vacuum pressure sensor, then can control predetermined vacuum through the regulation of suction gas device, can effectively improve system efficiency, promote product quality and productivity.

Description

Controllable low-pressure steam heating device

Technical Field

The utility model belongs to the technical field of heat energy engineering steam utilizes, concretely relates to controllable low pressure steam heating device.

Background

In the biomedical chemistry industry, the production of many products needs to be carried out at lower temperatures. The sensible heat heating of hot water is inhomogeneous, and the heating process is slower production capacity moreover and is lower, and the steam heating as latent heat source heating can realize quick, the even heating to the product, consequently receives people's attention. However, the existing steam source is generally superheated steam, and measures are needed to further treat the superheated steam. Most importantly, such operations generally need to be performed in a low pressure vacuum system. Therefore, accurate control of the vacuum level in the production process system is also a problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a controllable low pressure steam heating device solves present steam heating and generally all is superheated steam, needs to take the method to carry out further processing to superheated steam, and vacuum control is inaccurate during steam heating, influences the problem of production.

The utility model relates to a controllable low-pressure steam heating device, which comprises a steam supply pipe and a heat exchange jacket arranged outside a heating part and connected with the steam supply pipe, wherein the steam supply pipe is provided with a pressure control valve and a temperature control valve I; the bottom of the heat exchange jacket is connected with a drain pipe, a drain valve is arranged on the drain pipe, the lower end of the drain pipe is connected with an air suction device, and one side of the top of the heat exchange jacket is provided with a vacuum degree pressure sensor. The vacuum pressure sensor can display the measured data.

The air suction device comprises a water tank, an ejector, a circulating pump and a circulating pipeline, one end of the circulating pipeline is connected with the bottom of the water tank, the other end of the circulating pipeline is connected with the upper portion of the water tank, the circulating pump and the ejector are arranged on the circulating pipeline in series, the lower end of a drain pipe is connected with the ejector, and the top of the water tank is connected with a cooling water supply pipe. The eductor circulates water through the tank using a circulation pump to create an attractive force for maintaining a vacuum within the heat exchange jacket.

And a second temperature control valve is arranged on the cooling water supply pipe. Since the pressure generated by the eductor is dependent on the temperature of the fluid flowing through the eductor, the suction force of the eductor can be controlled by adjusting the temperature of the water in the cooling water supply line to control the vacuum condition in the heat exchange jacket.

One side of the upper part of the water tank is connected with an overflow pipe, and the overflow pipe is provided with an overflow valve. The overflow pipe can prevent the water in the water tank from overflowing.

One side of the drain valve is connected with a bypass valve in parallel, so that the influence on the work caused by the damage of the drain valve is prevented.

The circulating pipeline is connected with a drain pipe, and the drain pipe is provided with a drain valve. The surplus residual water in the circulation path can be discharged through the drain pipe, and the pipeline is protected.

The vacuum degree pressure sensor is internally provided with a timer unit capable of measuring a predetermined time. The vacuum degree pressure sensor having a built-in timer unit measures the time required for the heat exchange jacket to reach a predetermined vacuum state, determines the amount of air sucked into the heat exchange jacket, and can maintain the vacuum state of the heat exchange jacket at a prescribed value by compensating for the portion where a large amount of air is sucked before the full scale operation of the controllable low pressure steam heating apparatus.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses can provide the even accurate heating of steam that has predetermined pressure and predetermined temperature through the steam supply pipe and be heated the thing, detect the vacuum state in the cover through vacuum pressure sensor, then can control predetermined vacuum through the regulation of suction gas device, can effectively improve system efficiency, promote product quality and productivity.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure: 1. heating part, 2, heat exchange jacket, 3, steam supply pipe, 4, cooling water supply pipe, 5, overflow valve, 6, temperature control valve II, 7, drain valve, 8, drain pipe, 9, pressure control valve, 10, temperature control valve I, 11, drain valve, 12, bypass valve, 13, water tank, 14, ejector, 15, circulating pump, 16, circulating pipeline, 17 and vacuum degree pressure sensor.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in FIG. 1, the utility model discloses a controllable low pressure steam heating device, including steam supply pipe 3 and the heat exchange that sets up to be connected with steam supply pipe 3 in heating portion 1 outside press from both sides cover 2, be equipped with pressure control valve 9 and temperature control valve 10 on the steam supply pipe 3, the bottom that the heat exchange pressed from both sides cover 2 is connected with the drain pipe, is equipped with drain valve 11 on the drain pipe, and the drain pipe lower extreme is connected with the suction gas device, and top one side that the heat exchange pressed from both sides cover 2 is equipped with vacuum pressure sensor 17.

The air suction device comprises a water tank 13, an ejector 14, a circulating pump 15 and a circulating pipeline 16, one end of the circulating pipeline 16 is connected with the bottom of the water tank 13, the other end of the circulating pipeline 16 is connected with the upper part of the water tank 13, the circulating pump 15 and the ejector 14 are connected in series on the circulating pipeline 16, the ejector 14 is connected with the lower end of a drain pipe, and the top of the water tank 13 is connected with a cooling water supply pipe 4.

A second temperature control valve 6 is arranged on the cooling water supply pipe 4.

One side of the upper part of the water tank 13 is connected with an overflow pipe, and an overflow valve 5 is arranged on the overflow pipe.

A bypass valve 12 is connected in parallel to the trap 11.

The circulating pipeline 16 is connected with a drain pipe 8, and the drain pipe 8 is provided with a drain valve 7.

The vacuum degree pressure sensor 17 incorporates a timer unit capable of measuring a predetermined time.

The working principle and the flow are as follows:

the steam supply pipe 3 is connected to a steam source such as a boiler, and is depressurized and cooled by a steam pressure control valve 9 and a temperature control valve one 10, and steam having a predetermined pressure and a predetermined temperature enters the jacket part 2 to uniformly and rapidly heat the heating part 1.

The lower end of the heat exchange jacket 2 is connected to the ejector 14 of the suction gas device via a trap 11 and a bypass valve 12. The condensed water produced by the steam is drawn into the eductor 14 through the trap 11 and returned to the water tank 12. The ejector 14 circulates the water in the water tank 12 through by the circulation pump 15, thereby generating an attraction force for maintaining the vacuum state inside the jacket 2. Since the pressure generated by the eductor 14 is dependent on the temperature of the fluid flowing through the eductor 14, the draw of the eductor can be controlled by adjusting the temperature of the water in the cooling water supply line 4 to control the vacuum in the jacket 2. The overflow pipe and the overflow valve 5 prevent the water in the water tank 12 from overflowing, and a part of the circulation path 16 is branched and connected to the extra drain pipe 8.

Meanwhile, the vacuum degree pressure sensor 17 having a built-in timer may detect a vacuum state in the jacket 2 to detect whether a predetermined vacuum state is maintained. If the prescribed vacuum pressure is not reached, the apparatus is stopped and the joints of the valves and pipes connected to the heat exchange jacket 2 or the joints of the heat exchange jacket 2 and the heating section 1 are checked, and the predetermined vacuum state is maintained by checking the regulation. At the initial start-up of the controllable low pressure steam heating apparatus, the vacuum degree pressure sensor 17 having a built-in timer unit measures the time required for the heat exchange jacket 2 to reach a predetermined vacuum state, determines the amount of air sucked into the heat exchange jacket 2, and can maintain the vacuum state of the heat exchange jacket 2 at a prescribed value by compensating for the portion where a large amount of air is sucked before the full scale operation of the controllable low pressure steam heating apparatus.

To sum up, the utility model discloses can provide the even accurate heating of steam that has predetermined pressure and predetermined temperature through the steam supply pipe and be heated the thing, detect the vacuum state who presss from both sides in the cover through vacuum pressure sensor, then can control predetermined vacuum through the regulation of suction gas device, can effectively improve system efficiency, promote product quality and productivity.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention rather than requiring the present invention to be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Claims

1. A controllable low-pressure steam heating device comprises a steam supply pipe (3) and a heat exchange jacket (2) which is arranged outside a heating part (1) and connected with the steam supply pipe (3), and is characterized in that: the steam supply pipe (3) is provided with a pressure control valve (9) and a temperature control valve I (10), the bottom of the heat exchange jacket (2) is connected with a drain pipe, the drain pipe is provided with a drain valve (11), the lower end of the drain pipe is connected with a suction gas device, and one side of the top of the heat exchange jacket (2) is provided with a vacuum degree pressure sensor (17).

2. A controllable low pressure steam heating apparatus as claimed in claim 1, wherein: the air suction device comprises a water tank (13), an ejector (14), a circulating pump (15) and a circulating pipeline (16), one end of the circulating pipeline (16) is connected with the bottom of the water tank (13), the other end of the circulating pipeline (16) is connected with the upper part of the water tank (13), the circulating pump (15) and the ejector (14) are connected in series on the circulating pipeline (16), the ejector (14) is connected with the lower end of a drain pipe, and the top of the water tank (13) is connected with a cooling water supply pipe (4).

3. A controllable low-pressure steam heating apparatus as claimed in claim 2, wherein: and a second temperature control valve (6) is arranged on the cooling water supply pipe (4).

4. A controllable low pressure steam heating apparatus as claimed in claim 3, wherein: one side of the upper part of the water tank (13) is connected with an overflow pipe, and an overflow valve (5) is arranged on the overflow pipe.

5. A controllable low pressure steam heating apparatus as claimed in any one of claims 1 to 4, wherein: one side of the drain valve (11) is connected with a bypass valve (12) in parallel.

6. A controllable low pressure steam heating apparatus as claimed in claim 5, wherein: the circulating pipeline (16) is connected with a drain pipe (8), and the drain pipe (8) is provided with a drain valve (7).

7. A controllable low pressure steam heating apparatus as claimed in claim 5, wherein: the vacuum degree pressure sensor (17) is provided with a timer unit capable of measuring a predetermined time.