CN218973263U

CN218973263U - Novel vacuum condenser

Info

Publication number: CN218973263U
Application number: CN202223139740.2U
Authority: CN
Inventors: ***; 嘉侯明; 李和杰; 盛磊; 祝建仁; 刘建楠; 魏榕; 管志; 刘艳; 余桂红
Original assignee: Zhejiang Hangzhen Energy Technology Co ltd; China Petroleum and Chemical Corp; Sinopec Guangzhou Engineering Co Ltd
Current assignee: Zhejiang Hangzhen Energy Technology Co ltd; China Petroleum and Chemical Corp; Sinopec Guangzhou Engineering Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-05-05
Anticipated expiration: 2032-11-25

Abstract

The utility model discloses a novel vacuum condenser, which aims to solve the problems that the existing condenser is high in exhaust temperature after condensation in a vacuum environment, and carries more water vapor and the like. The condenser comprises a condenser shell, a floating head cover and a water inlet and outlet pipe box, wherein two air inlets are formed in the upper parts of two sides of the condenser shell, an air outlet is formed in one side of the middle of the condenser shell, a condensate outlet is formed in the bottom of the condenser shell, a tube bundle is arranged in the condenser shell, the right side of the condenser shell is connected with the water inlet and outlet pipe box, the tube bundle comprises tube plates on two sides and heat exchange tubes between the tube plates, an inclined long baffle plate is arranged in the middle of the air outlet side of the tube bundle, the inclined long baffle plate is arranged in the direction of 30-60 degrees downwards, the inclined long baffle plate divides the heat exchange tubes into an upper heat exchange tube and a lower heat exchange tube, a water outlet and a water inlet are respectively formed in the upper part and the lower part of the water inlet and outlet pipe box, the baffle plate is identical to the corresponding position and shape of the inclined long baffle plate.

Description

Novel vacuum condenser

Technical Field

The utility model belongs to the technical field of vacuum, and particularly relates to a novel vacuum condenser.

Background

In a crude oil refining vacuum distillation device, a vacuum pumping system is core equipment of a vacuum deep drawing process, and the quality of a vacuum pumping effect directly influences key output data such as the drawing rate of the vacuum deep drawing process. The vacuum pumping system equipment generally consists of a steam evacuator and a vacuum condenser, the vacuum requirement required by the vacuum distillation device is achieved through three stages of steam evacuators, a vacuum condenser is arranged behind each stage of steam evacuator, the condensable gas exhausted by the steam evacuator is condensed and cooled, the pumping load of the steam evacuator of the next stage is reduced, and the operation efficiency of the vacuum pumping system is improved. The internal pressure of the vacuum condenser is vacuum, the difference between the condensation temperature of the water vapor and the temperature of cooling water is very small, the condensation amount of the water vapor can be greatly influenced when the temperature of the exhaust gas of the vacuum condenser is increased or reduced by 1 ℃, the condensation effect of the water vapor directly influences the pumping load of the steam evacuator of the next stage, and then the vacuum effect and the decompression deep drawing extraction rate of the whole vacuumizing system are influenced. In the existing vacuum system, the vacuum condensation effect on condensable gas is poor, the exhaust temperature after condensation in the vacuum environment is high, more water vapor is carried, and the condensation effect of the vacuum condenser is poor.

Disclosure of Invention

The utility model aims to provide a novel vacuum condenser to solve the problems that the existing condenser is high in exhaust temperature and high in carrying water vapor after condensation in a vacuum environment. The vacuum condenser has the advantages of good condensing and cooling effect, low exhaust temperature and less vapor carried in exhaust.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a novel vacuum condenser, includes the condenser casing, and the condenser casing adopts the cylinder, and the both sides upper portion of condenser casing is provided with two air inlets, is provided with an gas vent in the middle part of the condenser casing, is provided with a condensate outlet in condenser casing bottom, sets up the tube bank in the condenser casing, and outer skull, its characterized in that are connected in the left side of condenser casing: the vacuum condenser further comprises a floating head cover and a water inlet and outlet pipe box, the right side of the condenser shell is connected with the water inlet and outlet pipe box, the tube bundle comprises tube plates at two sides and heat exchange tubes between the tube plates, an inclined long baffle plate is arranged in the middle of the exhaust side of the tube bundle, the inclined long baffle plate is arranged downwards in the direction of 30-60 degrees, the inclined long baffle plate divides the heat exchange tubes into an upper heat exchange tube and a lower heat exchange tube, the upper part and the lower part of the water inlet and outlet pipe box are respectively provided with a water outlet and a water inlet, the water inlet and outlet pipe box are respectively divided into a water outlet side and a water inlet side through a partition plate in the water inlet and outlet pipe box, the partition plate is identical in shape with the position corresponding to the inclined long baffle plate, the left tube plate of the tube bundle is connected with the floating head cover, and the right tube plate of the tube bundle is clamped and fixed by the condenser shell and the water inlet and outlet pipe box and is respectively communicated with the water inlet and the water outlet of the water inlet and outlet pipe box.

The utility model is further technically characterized in that: the two sides of the condenser shell are respectively connected with the outer head cover and the water inlet and outlet pipe box through flanges.

The utility model is further technically characterized in that: the end part of the inclined long baffle plate is provided with a sealing strip and a condenser shell to form the sealing of an upper part tube bundle and a lower part tube bundle.

The utility model is further technically characterized in that: and an air inlet distribution baffle pipe is arranged at the position of the tube bundle corresponding to the two air inlets. A plurality of support plates are arranged in the middle of the heat exchange tube, the heat exchange tube is divided into a plurality of condenser areas, and the air inlet distribution baffle tube is fixed on the support plates.

The utility model is mainly used for the environment of the vacuumizing system in the reduced pressure distillation device.

Compared with the prior art, the utility model has the following beneficial effects:

1. the condenser is specially designed for vacuum, and vacuum air flow can be distributed to all condensation areas through the air inlet distribution baffle pipe under the preferential condition after entering the condenser shell from the top, so that the flow section of the air flow is increased, and the resistance drop of the vacuum air is reduced.

2. The utility model adopts the inclined long baffle plate and the inclined water inlet and outlet chamber baffle plate to divide the heat exchange tube into an upper part and a lower part, after the vacuum air flow enters the vacuum condenser, the vacuum air flow is condensed and heat exchanged through the upper part heat exchange tube, and then is discharged out of the condenser after being condensed and heat exchanged through the lower part heat exchange tube, at the air outlet side, only the lower part heat exchange tube exchanges heat with the vacuum air flow, the highest temperature of cooling water in the lower part heat exchange tube is only 1/2 of the water outlet temperature of the cooling water, and if the water inlet and outlet temperature difference of the cooling water is 8 ℃, the exhaust temperature is reduced by about 4 ℃, the carried vapor in the exhaust air is greatly reduced, and the condensation effect of the vacuum condenser is improved.

The utility model is further described in detail below with reference to the drawings and the detailed description, without limiting the scope of the utility model.

Drawings

Fig. 1 is a schematic structural view of a novel vacuum condenser according to the present utility model.

Fig. 2 is a view from A-A of fig. 1, i.e. a side view of the condenser shell side.

Fig. 3 is a view from the direction B-B of fig. 1, i.e., a condenser water inlet and outlet pipe box diagram.

The reference numerals shown in the figures are:

1. a condenser housing; 2. an air inlet; 3. an exhaust port; 4. a condensate outlet; 5. a tube bundle; 6. an intake air distribution baffle tube; 7. a support plate; 8. a floating head cover; 9. oblique long baffle plates; 10. a sealing strip; 11. an outer head cover; 12. a water inlet and outlet pipe box; 13. a water outlet; 14. a water inlet; 15. a partition board.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1, 2 and 3 in the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, 2 and 3, the utility model relates to a novel vacuum condenser, which comprises a condenser shell 1, wherein the condenser shell 1 comprises a cylindrical barrel, two air inlets 2 are arranged at the upper parts of two sides of the condenser shell 1, an air outlet 3 is arranged at one side of the middle part of the condenser shell, and a condensate outlet 4 is arranged at the bottom of the condenser shell 1. The left side of the condenser housing 1 is connected to an outer head cover 11.

The condenser shell 1 further comprises a floating head cover 8 and a water inlet and outlet pipe box 12, the condenser shell 1 is internally provided with a pipe bundle 5, the pipe bundle 5 comprises pipe plates at two sides and heat exchange pipes between the pipe plates, the pipe bundle 5 is divided into an upper part heat exchange pipe and a lower part heat exchange pipe through a downward 45-degree inclined long baffle plate 9 arranged at the middle part of the exhaust side of the pipe bundle 5, the end part of the inclined long baffle plate 9 is provided with a sealing strip 10 to form sealing of the upper part heat exchange pipe and the lower part heat exchange pipe with the condenser shell 1, vacuum gas is prevented from being directly shorted to the exhaust port 3 through condensation heat exchange of the upper part heat exchange pipe, the sealing strip 10 is made of high-temperature-resistant polytetrafluoroethylene materials, and the service life of the sealing strip 10 is prevented from being reduced due to overhigh temperature. The middle of the heat exchange tube is provided with a plurality of support plates 7 which divide the heat exchange tube into a plurality of condensation areas and support the heat exchange tube, so that vibration generated by air flow impact in the working stage is reduced. The position above the tube bundle 5 corresponding to the two air inlets 2 is provided with an air inlet distribution baffle tube 6, the air inlet distribution baffle tube 6 is fixed on a supporting plate 7, the impact of high-speed vacuum air flow on the heat exchange tube is reduced, the service life of the heat exchange tube is prolonged, the air flow is distributed to each condensation area, the flow velocity of the vacuum air is reduced, and the condensation heat exchange effect is enhanced. The left side of the tube bundle 5 is connected with the floating head cover 8 through a flange, so that the upper part and the lower part of the heat exchange tube are connected in series, and the tube plate on the right side of the tube bundle 5 is clamped and fixed by the flange of the condenser shell 1 and the water inlet and outlet pipe box 12 and is communicated with the water inlet 14 and the water outlet 13 of the water inlet and outlet pipe box 12.

The upper and lower parts of the water inlet and outlet pipe box 12 are respectively provided with a water outlet 13 and a water inlet 14, and are divided into a water outlet side and a water inlet side by a partition plate 15 in the water inlet and outlet pipe box 12, and the partition plate 15 has the same shape as the position corresponding to the inclined long baffle plate 9, so that the water inlet side and the water outlet side correspond to the lower part and the upper part of the heat exchange pipe respectively.

The novel vacuum condenser provided by the utility model has the advantages that cooling water enters the first tube side, namely the lower heat exchange tube through the water inlet 14, enters the second tube side, namely the upper heat exchange tube after the direction of the cooling water is converted through the floating head cover 8, and then is discharged out of the condenser through the water outlet 13 when in use. Vacuum gas enters the condenser shell 1 from the air inlet 2, is distributed to each condensation area through the air inlet distribution baffle pipe 6, firstly performs condensation heat exchange with cooling water in the upper heat exchange pipe, then bypasses the inclined long baffle plate 9 to perform condensation heat exchange with the cooling water in the lower heat exchange pipe, after the condensation heat exchange is finished, the condenser is discharged from the air outlet 3, and condensate is discharged from the condenser through the condensate outlet 4, so that the heat exchange condensation process is completed.

In the novel vacuum condenser, cooling water firstly passes through the first tube pass for heat exchange and then enters the second tube pass for heat exchange, the difference between the average temperature and the highest temperature of the cooling water in the heat exchange tubes in the two tube passes is 1/2 of the temperature difference between the inlet water and the outlet water, and the cooling water at the corresponding exhaust side is the cooling water in the first tube pass, so that in the novel vacuum condenser, the exhaust temperature can be calculated according to the highest temperature of the cooling water in the first tube pass as the outlet water temperature, the temperature of the temperature difference between the inlet water and the outlet water is correspondingly reduced by 1/2, and the steam quantity carried by the noncondensable gas of the exhaust is reduced.

In vacuum condensation heat exchange, the saturation temperature corresponding to vacuum gas is generally lower, the pressure of a condenser behind a booster of a vacuum system of a crude oil refining vacuum distillation device is generally 9-10.5 kPaA, the corresponding saturation temperature is 43.8-46.8 ℃, in a domestic chemical oil refinery, the inlet water temperature of cooling water is generally 32-33 ℃, the temperature rise of outlet water is generally calculated according to 6 ℃, and the calculated value of exhaust temperature is generally about 1-2 ℃ higher than the outlet water temperature. The vapor carried by the non-condensable gas discharged from the condenser can be calculated according to the vapor amount contained in the saturated wet gas. The pressure is calculated according to typical working conditions, the saturation temperature is 10kPa, the corresponding cooling water inlet temperature is 32 ℃, the outlet water temperature is 38 ℃, the outlet water temperature of the first tube side is 35 ℃, the exhaust temperature is 36 ℃, and the water vapor amount carried by 100kg of noncondensable gas is 91.1kg calculated according to saturated wet air.

If a common vacuum condenser is adopted, the exhaust temperature is calculated according to the outlet water temperature, and the exhaust temperature is 39 ℃, and 144.8kg of water vapor carried by 100kg of non-condensable gas is taken.

Compared with the common vacuum condenser, the novel vacuum condenser can reduce the water vapor carrying capacity by 37.1%, greatly reduce the pumping load of subsequent vacuum equipment, reduce the investment and the use cost of a vacuum system and improve the working efficiency of the whole vacuum system.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a novel vacuum condenser, includes the condenser casing, and the condenser casing adopts the cylinder, and the both sides upper portion of condenser casing is provided with two air inlets, is provided with an gas vent in the middle part of the condenser casing, is provided with a condensate outlet in condenser casing bottom, sets up the tube bank in the condenser casing, and outer skull, its characterized in that are connected in the left side of condenser casing: the vacuum condenser further comprises a floating head cover and a water inlet and outlet pipe box, the right side of the condenser shell is connected with the water inlet and outlet pipe box, the tube bundle comprises tube plates at two sides and heat exchange tubes between the tube plates, an inclined long baffle plate is arranged in the middle of the exhaust side of the tube bundle, the inclined long baffle plate is arranged downwards in the direction of 30-60 degrees, the inclined long baffle plate divides the heat exchange tubes into an upper heat exchange tube and a lower heat exchange tube, the upper part and the lower part of the water inlet and outlet pipe box are respectively provided with a water outlet and a water inlet, the water inlet and the water outlet are respectively divided into a water outlet side and a water inlet side through a partition plate in the water inlet and outlet pipe box, the partition plate is identical in shape with the corresponding position of the inclined long baffle plate, the left tube plate of the tube bundle is connected with the floating head cover, the upper part and the lower part of the heat exchange tubes are connected in series, and the right tube plate of the tube bundle is clamped and fixed by the condenser shell and the water inlet and the water outlet pipe box and is respectively communicated with the water inlet and the water outlet of the water inlet and the water outlet pipe box.

2. A novel vacuum condenser as claimed in claim 1, wherein: the two sides of the condenser shell are respectively connected with the outer head cover and the water inlet and outlet pipe box through flanges.

3. A novel vacuum condenser as claimed in claim 1, wherein: the end part of the inclined long baffle plate is provided with a sealing strip and a condenser shell to form the sealing of an upper part tube bundle and a lower part tube bundle.

4. A novel vacuum condenser as claimed in claim 1, wherein: and an air inlet distribution baffle pipe is arranged at the position of the tube bundle corresponding to the two air inlets.

5. The novel vacuum condenser of claim 4, wherein: a plurality of support plates are arranged in the middle of the heat exchange tube, and the air inlet distribution baffle tube is fixed on the support plates.