CN216409818U

CN216409818U - Shell temperature adjustable condenser

Info

Publication number: CN216409818U
Application number: CN202123317475.8U
Authority: CN
Inventors: 王宁; 孙纯刚; 王琪
Original assignee: Jiangnan Boilers & Pressure Vessels Zhangjiagang Co ltd
Current assignee: Jiangsu Jiangguo Intelligent Equipment Co.,Ltd.
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-04-29
Anticipated expiration: 2031-12-27

Abstract

The utility model discloses a shell temperature-adjustable condenser, which comprises a shell, a heat exchange tube arranged in the shell, two tube plates, a first inlet, a first outlet, a second inlet and a second outlet, wherein the two tube plates are respectively arranged in the shell and are used for sleeving two ends of the heat exchange tube in a one-to-one correspondence manner; the water pump is used for adjusting the medium flow input into the outer pipe according to the temperature difference between the shell and the heat exchange pipe. The condenser with the adjustable shell temperature can reduce the stress of the head of the heat exchange tube, and has lower equipment cost and lower potential safety hazard.

Description

Shell temperature adjustable condenser

Technical Field

The utility model relates to a condenser with an adjustable shell temperature.

Background

The existing condenser for condensing high-temperature steam in a product tower generally leads in the high-temperature steam in a shell pass, leads in a cooling medium in a tube pass, and condenses the high-temperature steam by the cooling medium to realize the recovery of products.

Because the shell temperature is higher, the heat exchange tube temperature is lower, and the difference in temperature between the two is great, leads to the stress between heat exchange tube and the tube sheet great, leads to the welding seam between heat exchange tube and the tube sheet to lose efficacy easily in the long term, reduces the life of condenser.

In the prior art, the problem of large stress is generally solved by arranging an expansion joint, and for a condenser with large capacity, the expansion joint with large diameter can increase the equipment cost and has large potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a condenser with an adjustable shell temperature, which can reduce the stress of a heat exchange tube head and has lower equipment cost and lower potential safety hazard.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a condenser with adjustable shell temperature comprises a shell, a heat exchange tube arranged in the shell, two tube plates which are respectively arranged in the shell and used for sleeving two ends of the heat exchange tube one by one, a first inlet and a first outlet which are respectively arranged at two ends of the shell and used for being communicated with two ends of the heat exchange tube one by one, a second inlet and a second outlet which are communicated with the shell, an outer tube which is abutted against the outer side of the shell through a side part, a water pump communicated with the outer tube, a first temperature sensor used for measuring the temperature of the shell, and a second temperature sensor used for measuring the temperature of the heat exchange tube;

the water pump is used for adjusting the medium flow input into the outer pipe according to the temperature difference between the shell and the heat exchange pipe.

Preferably, the outer pipe comprises a plurality of pipe bodies which are sequentially arranged at intervals and are respectively parallel to the axial lead direction of the shell, and elbows for connecting the end parts of the two adjacent pipe bodies.

More preferably, the plurality of pipe bodies are circumferentially wound around the outer side of the housing.

Preferably, the cross section of the outer pipe is arc-shaped, and the pipe wall of the outer pipe gradually gets away from the shell from outside to inside along the thickness direction of the outer pipe to form an inner groove.

More preferably, the angle of the inner bevel is alpha, wherein alpha is more than or equal to 35 degrees and less than or equal to 45 degrees.

More preferably, the outer tube has a semicircular cross section.

Preferably, the first temperature sensor comprises a first thermocouple disposed outside the housing.

Preferably, the second temperature sensor includes a plurality of second thermocouples provided in the heat exchange pipe, the plurality of second thermocouples being arranged at equal intervals in a radial direction of the housing and in a lengthwise extending direction of the heat exchange pipe.

More preferably, the number of the second thermocouples is the same in the heat exchange tube provided with the second thermocouples.

Preferably, the water pump is used for adjusting the flow rate of the medium input into the outer pipe so as to control the temperature difference between the shell and the heat exchange pipe to be 25 ℃ or below.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages: according to the condenser with the adjustable shell temperature, the outer pipe for leading in and out cooling medium is arranged on the outer side of the shell to reduce the temperature of the shell, the flow of the cooling medium in the outer pipe is adjusted by the water pump according to the temperature difference between the shell and the heat exchange pipe, so that the temperature of the shell is close to the temperature of the heat exchange pipe as much as possible, the stress between the heat exchange pipe and the pipe plate is reduced, the failure of a welding line between the heat exchange pipe and the pipe plate is avoided, and the service life of the condenser is prolonged; the cooled shell also has the condensing effect on the high-temperature steam in the shell, and the heat exchange area and the heat exchange efficiency of the high-temperature steam are improved.

Drawings

FIG. 1 is a schematic diagram of a condenser according to an embodiment of the present invention;

FIG. 2 is a schematic diagram showing an arrangement structure of a second thermocouple;

fig. 3 is a schematic view of a welding structure of the outer tube and the shell.

Wherein: 1. a housing; 2. a tube sheet; 3. a first inlet; 4. a first outlet; 5. a second inlet; 6. a second outlet; 7. an outer tube; 71. a pipe body; 72. bending the pipe; 73. an inner groove; 74. a third inlet; 75. a third outlet; 8. a water pump; 9. a first temperature sensor; 10. a second temperature sensor; 11. a heat exchange tube.

Detailed Description

The technical solution of the present invention is further explained below with reference to the specific embodiments and the accompanying drawings.

Referring to fig. 1 to 3, the present embodiment provides a condenser with an adjustable shell temperature, which includes a horizontal shell 1, a heat exchange tube 11 disposed in the shell 1, two tube plates 2 disposed in the shell 1 and used for sleeving two ends of the heat exchange tube 11 one by one, a first inlet 3 and a first outlet 4 disposed at two ends of the shell 1 and used for communicating with two ends of the heat exchange tube 11 one by one, and a second inlet 5 and a second outlet 6 communicated with the shell 1.

Referring to fig. 1, the housing 1 is parallel to the left-right direction, and referring to fig. 2, the radial section of the housing 1 is circular. The tube plate 2 has the same diameter as the inner diameter of the shell 1, and the ends of the heat exchange tubes 11 pass through the tube plate 2 and are welded to the tube plate 2. The first inlet 3 is arranged at the left end of the left tube plate 2, the first outlet 4 is arranged at the right end of the right tube plate 2, and the heat exchange tube 11 is used for introducing and discharging a cooling medium, such as cooling water. The second inlet 5 is arranged at the lower side of the shell 1, the second outlet 6 is arranged at the upper side of the shell 1, and high-temperature steam is introduced into the shell 1.

The condenser with the adjustable shell temperature further comprises an outer pipe 7, a water pump 8, a first temperature sensor 9 and a second temperature sensor 10, wherein the outer pipe 7 is abutted to the outer side of the shell 1 through the side portion, the water pump 8 is communicated with the outer pipe 7, the first temperature sensor is used for measuring the temperature of the shell 1, and the second temperature sensor is used for measuring the temperature of the heat exchange pipe 11. The water pump 8 is used for adjusting the flow rate of the medium input into the outer pipe 7 according to the temperature difference between the shell 1 and the heat exchange pipe 11 so as to maintain the temperature difference between the shell 1 and the heat exchange pipe 11 at a set value.

With this arrangement, the following advantages are provided:

firstly, the temperature difference between the shell 1 and the heat exchange tube 11 is reduced, so that the stress between the heat exchange tube 11 and the tube plate 2 is reduced, the failure of a welding seam between the heat exchange tube 11 and the tube plate 2 is avoided, and the service life of the condenser is prolonged;

secondly, the temperature difference change frequency between the shell 1 and the heat exchange tube 11 is reduced so as to reduce the stress change frequency between the heat exchange tube 11 and the tube plate 2, the failure of a welding seam between the heat exchange tube 11 and the tube plate 2 can also be avoided, and the service life of the condenser is prolonged;

thirdly, the cooled shell 1 has the same condensation effect on the high-temperature steam in the shell, so that the heat exchange area and the heat exchange efficiency of the high-temperature steam are improved;

and finally, when high-temperature and high-pressure steam is condensed, an expansion joint is avoided, so that the manufacturing cost of the equipment is reduced, and the potential safety hazard is reduced.

The outer tube 7 includes a plurality of tube bodies 71 arranged in sequence at intervals and parallel to the axial direction of the housing 1, and elbows 72 for connecting the ends of two adjacent tube bodies 71. Referring to fig. 1, a plurality of pipe bodies 71 are circumferentially wound around the outside of the housing 1. The length and number of the tube bodies 71 are set according to the cooling capacity actually required by the casing 1. By the cooperation of the two side elbows 72, the outer tube 7 forms a pipe for introducing the cooling medium at both ends, and the two ends of the outer tube 7 are respectively a third inlet 74 and a third outlet 75.

Referring to fig. 3, the cross section of the outer tube 7 is arc-shaped, and the wall of the outer tube 7 gradually departs from outside to inside along the thickness direction thereof and forms an inner bevel 73 away from the shell 1. By providing the inner groove 73, not only can automatic welding be realized, but also a weld (a hatched portion in fig. 3) can be welded through, and a welding effect between the outer tube 7 and the tube body 71 is ensured. In the embodiment, the angle of the inner bevel 73 is α, wherein α is greater than or equal to 35 ° and less than or equal to 45 °; the cross-section of the outer tube 7 is semicircular.

Referring to fig. 1, the first temperature sensor 9 includes a first thermocouple provided outside the housing 1.

Referring to fig. 2, the second temperature sensor 10 includes a plurality of second thermocouples provided in the heat exchange pipe 11, the plurality of second thermocouples being arranged at equal intervals in a radial direction of the housing 1 and at equal intervals in a lengthwise extending direction of the heat exchange pipe 11.

In the present embodiment, in the direction along the radius in the casing 1, there are three heat exchange tubes 11 having second thermocouples disposed therein, including the heat exchange tube 11 at the center of the circle, and each heat exchange tube 11 has three second thermocouples disposed therein. The three heat exchange tubes 11 are arranged at equal intervals along the radial direction of the shell 1, and the three second thermocouples in the same heat exchange tube 11 are arranged at equal intervals along the length extension direction of the heat exchange tube 11.

As the cooling medium in the heat exchange tube 11 advances, the temperature will gradually rise along with the proceeding of heat exchange; meanwhile, the temperatures of the high-temperature steam contacting the heat exchange tubes 11 at different positions of the shell 1 are different, because the high-temperature steam is gradually cooled along with the heat exchange when rising from bottom to top. It is necessary to calculate the average temperature of the heat exchange pipe 11 by providing a plurality of second thermocouples at different positions.

The average temperature of the heat exchange tube 11 is calculated by:

firstly, taking a first average value of the temperatures measured by three second thermocouples in one heat exchange tube 11 to obtain the average temperature of a single heat exchange tube 11;

then, the average temperature of all the heat exchange tubes 11 is taken as the second average value to obtain the average temperature of all the heat exchange tubes 11.

The average temperature is compared with the temperature of the shell 1 to control the medium flow rate of the water pump 8 input into the outer pipe 7, and the difference between the temperature of the shell 1 and the average temperature of the heat exchange pipe 11 is controlled to be 25 ℃ or below.

The following specifically explains the working process of this embodiment:

the condenser is arranged above the product tower, so that the second inlet 5 is opposite to the air outlet of the product tower, and cooling water is continuously introduced into the heat exchange tube 11 and the outer tube 7;

and adjusting the flow of the water pump 8 according to the difference between the average temperature of the heat exchange pipe 11 and the temperature of the shell 1 until the temperature difference meets the set condition.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a casing temperature adjustable condenser, includes the casing, locates heat exchange tube, two in the casing are located respectively in the casing and be used for the one-to-one ground cover to establish the tube sheet at heat exchange tube both ends, locate respectively the casing both ends just be used for the one-to-one ground with the first entry and the first export of heat exchange tube both ends intercommunication, with the second entry and the second export of casing intercommunication, its characterized in that: the condenser also comprises an outer pipe, a water pump, a first temperature sensor and a second temperature sensor, wherein the outer pipe is abutted against the outer side of the shell through the side part of the outer pipe, the water pump is communicated with the outer pipe, the first temperature sensor is used for measuring the temperature of the shell, and the second temperature sensor is used for measuring the temperature of the heat exchange pipe;

2. The condenser with adjustable shell temperature as claimed in claim 1, wherein: the outer pipe comprises a plurality of pipe bodies which are sequentially arranged at intervals and are respectively parallel to the axial lead direction of the shell and elbows used for connecting the end parts of the two adjacent pipe bodies.

3. The condenser with adjustable shell temperature according to claim 2, wherein: the plurality of pipe bodies are wound on the outer side of the shell along the circumferential direction.

4. The condenser with adjustable shell temperature as claimed in claim 1, wherein: the cross section of the outer pipe is arc-shaped, and the pipe wall of the outer pipe gradually gets away from the shell from outside to inside along the thickness direction of the outer pipe to form an inner groove.

5. The condenser with adjustable shell temperature as claimed in claim 4, wherein: the angle of the inner groove is alpha, wherein alpha is more than or equal to 35 degrees and less than or equal to 45 degrees.

6. The condenser with adjustable shell temperature as claimed in claim 4, wherein: the cross section of the outer pipe is semicircular.

7. The condenser with adjustable shell temperature as claimed in claim 1, wherein: the first temperature sensor comprises a first thermocouple arranged on the outer side of the shell.

8. The condenser with adjustable shell temperature as claimed in claim 1, wherein: the second temperature sensor comprises a plurality of second thermocouples arranged in the heat exchange tube, and the plurality of second thermocouples are arranged at equal intervals along the radial direction of the shell and are arranged at equal intervals along the length extending direction of the heat exchange tube.

9. The condenser with adjustable shell temperature as claimed in claim 8, wherein: in the heat exchange tube provided with the second thermocouples, the number of the second thermocouples is the same.

10. The condenser with adjustable shell temperature as claimed in claim 1, wherein: the water pump is used for adjusting the medium flow input into the outer pipe so as to control the temperature difference between the shell and the heat exchange pipe to be 25 ℃ or below.