Combined steam heating device

Abstract

The invention belongs to the field of heating, and particularly relates to a combined steam heating device. The steam heating device comprises a plurality of steam heating units which are sequentially connected, steam ports of every two adjacent steam heating units are fixedly connected, liquid ports of every two adjacent steam heating units are fixedly connected, a steam inlet in the uppermost portion is an upper heating unit steam inlet, and a liquid inlet in the uppermost portion is an upper heating unit liquid inlet. The lowest steam outlet is a lower heating unit steam outlet, the lower heating unit steam outlet is fixedly connected with a steam condensate pipe, the lowest liquid outlet is a lower heating unit liquid outlet, and the lower heating unit liquid outlet is fixedly connected with a liquid flowing pipe. The invention has the advantages of reduced steam condensation, reduced noise, repeated use, reduced replacement and maintenance cost, stable and reliable performance, stable structure, strong adaptability and the like.

Description

Technical Field

[0001] The present invention belongs to the field of heating, and specifically relates to a combined steam heating device, which is mainly suitable for operations in which steam needs to be directly introduced into liquid materials for heating. It has a stable structure and can be widely used in chemical, pharmaceutical, light industry, environmental protection, food and other fields. Background Art

[0002] Passing steam into liquid materials for heating is a common unit operation in industrial production processes. At present, steam is the most commonly used heating medium in the fields of chemical industry, medicine, light industry, environmental protection, food, etc. The temperature rise of liquid materials often requires direct introduction of steam. The direct introduction of steam is more efficient than indirect heat exchange, and the water after steam condensation can also effectively reduce the concentration of materials. Common straight-through steam devices often use spiral tubes or silencers. Steam will come into direct contact with liquid materials. Steam will quickly condense into water when it meets water. A vacuum is generated at the part where the steam disappears. The surrounding liquid to be heated will rush to the vacuum part at an extremely high flow rate, generating a great local impact force and also generating huge noise. The repeated action of this impact force can easily cause damage to equipment, pipelines, spiral tubes or silencers. The greater the amount of steam introduced, the greater the destructiveness. In severe cases, the factory will be forced to stop production and can only continue to operate after replacing the damaged parts. Summary of the invention

[0003] The present invention aims at solving the defects of the prior art and provides a combined steam heating device.

[0004] The present invention is implemented as follows: a combined steam heating device, which includes a plurality of steam heating units connected in sequence, the steam ports of two adjacent steam heating units are fixedly connected, the liquid ports of two adjacent steam heating units are fixedly connected, the steam inlet of the upper steam heating unit serves as the steam inlet of the upper heating unit of the combined steam heating device, the liquid inlet of the upper steam heating unit serves as the liquid inlet of the upper heating unit of the combined steam heating device, the steam outlet of the lower steam heating unit serves as the steam outlet of the lower heating unit of the combined steam heating device, the steam outlet of the lower heating unit is fixedly connected to a steam condensate pipe, the liquid outlet of the lower steam heating unit serves as the liquid outlet of the lower heating unit of the combined steam heating device, and the liquid outlet of the lower heating unit is fixedly connected to a liquid circulation pipe.

[0005] In the combined steam heating device as described above, the number of the steam heating units connected in series ranges from 2 to 10.

[0006] A combined steam heating device as described above, wherein the steam heating unit includes a hollow cylinder, a spiral tube is arranged in the cylinder, the inlet of the spiral tube is a steam inlet, the steam inlet is arranged at the top end of the cylinder, the outlet of the spiral tube is a steam outlet, the steam outlet is arranged at the bottom end of the cylinder, a liquid inlet is opened at the top end of the cylinder, a liquid outlet is opened at the bottom end of the cylinder, and the liquid inlet and the liquid outlet are connected to the internal cavity of the cylinder.

[0007] In the combined steam heating device as described above, a muffler is provided at the end of the steam condensate pipe.

[0008] In the combined steam heating device as described above, the muffler and the steam condensate pipe are fixedly connected via a support plate.

[0009] A combined steam heating device as described above, wherein the cylinder is provided with an upper cover and a lower cover; the cylinder, the upper cover and the lower cover are connected by welding;

[0010] The liquid inlet and the steam inlet are both arranged on the upper cover; the steam outlet and the liquid outlet are both arranged on the lower cover.

[0011] A combined steam heating device as described above, wherein the upper heating unit spiral tube of the upper steam heating unit of the combined steam heating device is connected to the lower heating unit spiral tube of the lower steam heating unit, and the cavity of the upper steam heating unit is connected to the cavity of the lower steam heating unit.

[0012] In the combined steam heating device as described above, the steam outlet of the upper heating unit of the upper steam heating unit is connected to the steam inlet of the lower heating unit of the lower steam heating unit via a flange.

[0013] In the combined steam heating device as described above, the upper heating unit liquid outlet of the upper steam heating unit is connected to the lower heating unit liquid inlet of the lower steam heating unit via a flange.

[0014] In the combined steam heating device as described above, the silencer and the steam condensate pipe are connected by welding via a support plate.

[0015] The significant effect of the present invention is that the steam in the device does not directly contact the material, which can minimize the damage of steam condensation to the equipment body and parts and reduce noise. The device can be used repeatedly without frequent replacement, which can effectively reduce the replacement and maintenance costs. It has the advantages of stable and reliable performance, stable structure, strong adaptability, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of steam heating unit;

[0017] Figure 2 Schematic diagram of the structure of the combined steam heating device;

[0018] Figure 3 Schematic diagram of the silencer structure.

[0019] In the figure: 1. upper cover, 2. cylinder, 3. lower cover, 4. steam outlet, 5. liquid outlet, 6. spiral tube, 7. liquid inlet, 8. steam inlet, 9. upper heating unit steam inlet, 10. upper heating unit steam outlet, 11. lower heating unit steam inlet, 12. lower heating unit steam outlet, 13. steam condensate pipe, 14. muffler, 15. upper heating unit liquid inlet, 16. upper heating unit spiral tube, 17. upper heating unit liquid outlet, 18. lower heating unit liquid inlet, 19. lower heating unit spiral tube, 20. lower heating unit liquid outlet, 21. liquid circulation pipe, 22. support plate. DETAILED DESCRIPTION

[0020] In order to enable technicians in this technical field to better understand the technical solution of this patent, this patent is further described in detail below in conjunction with the accompanying drawings and specific examples. The following examples are only descriptive and not restrictive, and cannot be used to limit the scope of protection of this patent.

[0021] As attached Figure 2 As shown in FIG. 1 , a combined steam heating device is mainly composed of two steam heating units (two are used as an example here, and more may be used). The structure of a single steam heating unit is shown in FIG. Figure 1 As shown, the steam heating unit is composed of an upper cover 1, a cylinder 2, a lower cover 3, a steam outlet 4, a liquid outlet 5, a spiral tube 6, a liquid inlet 7, and a steam inlet 8. The cylinder 2 is connected to the upper cover 1 and the lower cover 3 by welding. The upper cover 1 is welded to the steam inlet 8, and a liquid inlet 7 is opened on the upper cover 1. The lower cover 3 is welded to the steam outlet 4, and a liquid outlet 5 is opened on the lower cover 3. The steam inlet 8, the spiral tube 6 and the steam outlet 4 are an integral whole.

[0022] As attached Figure 2 As shown, in addition to the two steam heating units, the combined steam heating device also has a steam condensate pipe 13, a silencer 14 and a liquid circulation pipe 21. We call the two steam heating units the upper heating unit and the lower heating unit, respectively. The steam outlet 10 of the upper heating unit and the steam inlet 11 of the lower heating unit are connected by a flange, and the liquid outlet 17 of the upper heating unit and the liquid inlet 18 of the lower heating unit are also connected by a flange. The liquid circulation pipe 21 is connected to the liquid outlet 20 of the lower heating unit by a flange, and the steam condensate pipe 13 is connected to the steam outlet 12 of the lower heating unit by a flange. The steam condensate pipe 13 is partially inserted into the liquid circulation pipe 21, and the inserted end is welded to the silencer 14. As shown in the attached figure Figure 3As shown, the silencer 14 and the steam condenser pipe 13 are connected via two support plates 22, and the support plates 22 are welded between the two.

[0023] The following is a combination of two steam heating units to illustrate the working principle of the combined steam heating device. The combination of heating units in this device is not limited to two, and different numbers of heating units can be combined according to the size of the steam flow rate. Here, only two are taken as an example.

[0024] Press Attach Figure 2 As shown, the combined steam heating device is assembled, and the liquid to be heated is introduced from the upper heating unit liquid inlet 15, flows through the upper heating unit cavity, the upper heating unit liquid outlet 17, the lower heating unit liquid inlet 18, the lower heating unit cavity, the lower heating unit liquid outlet 20, and enters the liquid circulation pipe 21. The steam is introduced from the upper heating unit steam inlet 9, flows through the upper heating unit spiral tube 16, the upper heating unit steam outlet 10, the lower heating unit steam inlet 11, the lower heating unit spiral tube 19, the lower heating unit steam outlet 12, the steam condensate pipe 13, and the muffler 14 and enters the liquid circulation pipe 21. During the process of flowing from top to bottom, the steam exchanges heat between the wall of the spiral tube and the liquid to be heated, and is continuously condensed into water. The combination of the two heating units should ensure that all or most of the steam is condensed into water when it flows to the steam outlet 12 of the lower heating unit. If there is still a small part of the steam that has not condensed into water, the small part of the steam will condense into water when it mixes with the liquid to be heated after passing through the silencer 14 into the liquid circulation pipe 21. The silencer 14 is to eliminate the noise generated after the uncondensed steam enters the circulation pipe 21. The larger the surface area of ​​the spiral tubes of the two heating units, the more sufficient the heat exchange between the steam and the liquid to be heated. This device can meet the requirements of different steam flow rates. The larger the flow rate, the more heating units should be.

[0025] The advantages of this patent are: different numbers of heating units can be combined according to the temperature rise of the liquid and the size of the steam flow rate. The damage to the equipment and components caused by steam condensation can be minimized, and the noise can be reduced. The performance is stable and reliable, the structure is stable, the adaptability is strong, and the maintenance is convenient.

Claims

1. A combined steam heating device, Features: The invention comprises a plurality of steam heating units connected in sequence, wherein the steam ports of two adjacent steam heating units are fixedly connected, the liquid ports of two adjacent steam heating units are fixedly connected, the steam inlet of the uppermost steam heating unit serves as the steam inlet (9) of the upper heating unit of the combined steam heating device, the liquid inlet of the uppermost steam heating unit serves as the liquid inlet (15) of the upper heating unit of the combined steam heating device, the steam outlet of the lowermost steam heating unit serves as the steam outlet (12) of the lower heating unit of the combined steam heating device, the steam outlet (12) of the lower heating unit is fixedly connected to a steam condensate pipe (13), the liquid outlet of the lowermost steam heating unit serves as the liquid outlet (20) of the lower heating unit of the combined steam heating device, and the liquid outlet (20) of the lower heating unit is fixedly connected to a liquid circulation pipe (21).

2. A combined steam heating device as claimed in claim 1, Features: The number of steam heating units connected in series ranges from 2 to 10.

3. A combined steam heating device as claimed in claim 2, Features: The steam heating unit comprises a hollow cylinder (2), a spiral tube (6) is arranged inside the cylinder (2), the inlet of the spiral tube (6) is a steam inlet (8), the steam inlet (8) is arranged at the top end of the cylinder (2), the outlet of the spiral tube (6) is a steam outlet (4), the steam outlet (4) is arranged at the bottom end of the cylinder (2), the top end of the cylinder (2) is provided with a liquid inlet (7), the bottom end of the cylinder (2) is provided with a liquid outlet (5), and the liquid inlet (7) and the liquid outlet (5) are connected to the internal cavity of the cylinder (2).

4. A combined steam heating device as claimed in claim 3, Features: A muffler (14) is provided at the end of the steam condensate pipe (13).

5. A combined steam heating device as claimed in claim 4, Features: The muffler (14) and the steam condensate pipe (13) are fixedly connected via a support plate (22).

6. A combined steam heating device as claimed in claim 5, Features: The cylinder (2) is provided with an upper cover (1) and a lower cover (3); the cylinder (2) is connected to the upper cover (1) and the lower cover (3) by welding; The liquid inlet (7) and the steam inlet (8) are both arranged on the upper cover (1); and the steam outlet (4) and the liquid outlet (5) are both arranged on the lower cover (3).

7. A combined steam heating device as claimed in claim 6, Features: The upper heating unit spiral tube (16) of the upper steam heating unit of the combined steam heating device is connected to the lower heating unit spiral tube (19) of the lower steam heating unit, and the cavity of the upper steam heating unit is connected to the cavity of the lower steam heating unit.

8. A combined steam heating device as claimed in claim 7, Features: The upper heating unit steam outlet (10) of the upper steam heating unit and the lower heating unit steam inlet (11) of the lower steam heating unit are connected via flanges.

9. A combined steam heating device as claimed in claim 8, Features: The upper heating unit liquid outlet (17) of the upper steam heating unit and the lower heating unit liquid inlet (18) of the lower steam heating unit are connected via flanges.

10. A combined steam heating device as claimed in claim 9, Features: The silencer (14) and the steam condensate pipe (13) are connected by welding via a support plate (22).

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