CN214513299U

CN214513299U - Integrated system for dehydrating flue gas

Info

Publication number: CN214513299U
Application number: CN202120580000.9U
Authority: CN
Inventors: 梁国华
Original assignee: Hangzhou Yushun Gas Equipment Technology Co ltd
Current assignee: Hangzhou Yushun Gas Equipment Technology Co ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-10-29
Anticipated expiration: 2031-03-22

Abstract

The utility model discloses an integrated system for carrying out dehydration treatment on flue gas. Comprises a primary cooler, a sealed pressure stabilizing tank, at least one secondary cooler, a heat exchanger and a filter; the secondary cooler is arranged in the sealed pressure stabilizing tank, and the primary cooler, the secondary cooler, the heat exchanger and the filter are sequentially connected in series through pipelines to cool and separate flue gas; the first-stage cooler is provided with a flue gas interface, a first-stage heat exchange medium inlet and a first-stage heat exchange medium outlet. The utility model discloses can solve and how optimize the structure of device, make its mode that adopts hierarchical cooling hydrofuge reach the technical problem of liquid-gas separation purpose.

Description

Integrated system for dehydrating flue gas

Technical Field

The utility model relates to a gas or vapour separation field in the flue gas, specific flue gas dewatering device who uses in petrochemical trade that says so.

Background

Flue gas dehydration devices are often adopted in the petrochemical industry to remove moisture in gas mixtures, the existing devices directly adopt a single-stage heat exchange mode to condense flue gas, and the mode has high energy consumption demand on equipment, so that the equipment is expensive and large in size.

Chinese patent publication No. CN2016211935996 discloses a vertical normal pressure flue gas freezing dryer, which is composed of a flue gas inlet pipe, a guide cover, an evaporator shell, a water storage tank, a flue gas outlet pipe and a support bolt connection to form a freezing dryer main body, wherein the evaporator shell is internally provided with an evaporator and a water catching screen plate, the water storage tank is provided with a water level window, a water level upper limit switch, a water level lower limit switch and a drainage pump; the refrigerator is connected with the evaporator through a refrigerant pipeline, flue gas enters the flow guide sleeve from the flue gas inlet pipe and is cooled through the evaporator, the moisture condensation of the flue gas is realized, condensed water falls into the water storage tank through the water capture net plate, and the flue gas with water removed is discharged from the flue gas outlet pipe and is sent to the compressor; when the condensed water stored in the water storage tank reaches the upper limit of the water level, the upper limit switch of the water level is connected with the drainage pump to start drainage, and when the condensed water falls to the lower limit switch of the water level under water, the drainage pump stops drainage. The device only adopts a single evaporator for cooling, which is not efficient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an integrated system who carries out dehydration to flue gas solves the structure of how to optimize the device, makes its mode that adopts hierarchical cooling hydrofuge reach the technical problem of liquid-gas separation purpose.

The integrated system for dehydrating the flue gas comprises a primary cooler, a sealed pressure stabilizing tank, at least one secondary cooler, a heat exchanger and a filter; the secondary cooler is arranged in the sealed pressure stabilizing tank, and the primary cooler, the secondary cooler, the heat exchanger and the filter are sequentially connected in series through pipelines to cool and separate flue gas; the first-stage cooler is provided with a flue gas interface, a first-stage heat exchange medium inlet and a first-stage heat exchange medium outlet; the secondary cooler is provided with a secondary heat exchange medium inlet and a secondary heat exchange medium outlet; the flue gas interface is matched with a flue gas pipeline outside the integrated system, the primary heat exchange medium inlet and the secondary heat exchange medium inlet are matched with a cold water inlet end outside the integrated system, and the primary heat exchange medium outlet and the secondary heat exchange medium outlet are matched with a hot water outlet end outside the integrated system.

The primary cooler is a water-cooling cooler.

The secondary cooler is a water-cooling cooler, and two secondary coolers connected in series are arranged in the sealed pressure stabilizing tank.

The primary cooler has a first pressure sensor at a flue gas interface location.

The gas outlet location of the filter has a second pressure sensor.

And a first temperature sensor is arranged on a pipeline between the sealed pressure stabilizing tank and the heat exchanger.

And a second temperature sensor is arranged on a pipeline between the heat exchanger and the filter.

And the sealed pressure stabilizing tank and the filter are provided with drainage pieces.

The filter interior has a filter element disposed above the filter interior and a wire mesh disposed below the filter interior with the liquid-gas inlet of the filter between the filter element and the wire mesh.

The heat exchange medium is cooling water.

The utility model has the advantages that:

1. the utility model discloses according to the multistage cooler of temperature drop operating mode design of difference, adopt sealed surge tank to carry out the steady voltage simultaneously, guarantee whole cooling process and the fine cooperation of flue gas, realize fine purification, drainage function to the flue gas.

2. The utility model discloses a hot water is derived to the place that needs after carrying out heat transfer treatment to the flue gas to the energy can be saved.

3. The utility model discloses entire system simple structure, the operation of being convenient for.

Drawings

FIG. 1 is a process flow diagram of the present invention;

fig. 2 is a perspective view of the present invention;

fig. 3 is another perspective view of the present invention;

fig. 4 is a schematic top view of the present invention;

in the figure, 1, a primary cooler, 11, a flue gas interface, 12, a primary heat exchange medium inlet, 13, a primary heat exchange medium outlet, 2, a sealed surge tank, 3, a secondary cooler, 31, a secondary heat exchange medium inlet, 32, a secondary heat exchange medium outlet, 4, a heat exchanger, 5, a filter, 51, an exhaust port, 61, a first pressure sensor, 62, a second pressure sensor, 63, a first temperature sensor, 64, a second temperature sensor, 71, a cold water inlet end, 72, a hot water outlet end and 8 a water discharging piece are arranged.

Detailed Description

Referring to fig. 1 to 4, the integrated system for dehydrating flue gas includes a primary cooler 1, a sealed surge tank 2, two secondary coolers 3, a heat exchanger 4, and a filter 5. The primary cooler 1 is used for initially cooling the flue gas in an initial state, the secondary cooler 3 is used for secondarily cooling the flue gas in a pressure maintaining state of the pressure stabilizing tank, the heat exchanger 4 is used for thirdly cooling the flue gas, and the filter 5 is used for liquid-gas separation after cooling. The first-stage cooler 1, the second-stage cooler 3, the heat exchanger 4 and the filter 5 are sequentially connected in series through pipelines to cool and separate flue gas.

The primary cooler 1 is a water-cooled cooling tower, namely, the primary cooler adopts cooling water as a heat exchange medium to carry out heat exchange cooling on the flue gas, and the primary cooler 1 is provided with a flue gas interface 11, a primary heat exchange medium inlet 12 and a primary heat exchange medium outlet 13; the flue gas interface 11 is used for communicating with a flue gas pipeline outside the integrated system so as to lead the flue gas into the primary cooler 1, the primary heat exchange medium inlet 12 is matched with a cold water inlet end 71 outside the integrated system so as to lead external cooling water into the primary cooler 1, and the primary heat exchange medium outlet 13 is matched with a hot water outlet end 72 outside the integrated system so as to lead the cold water to be subjected to heat exchange into hot water and then be led out. In order to detect the pressure at the location of the flue gas interface 11, a first pressure sensor 61 may be mounted on the pipe at this location. The flue gas with high temperature and high humidity of 180 ℃ can be cooled to the flue gas with 60 ℃ by the action of the primary cooler 1.

The sealed surge tank 2 is a simple tank structure, mainly plays a role in pressure maintaining in the cooling process, and is provided with a plurality of interfaces so as to be matched with other components.

The secondary cooler 3 is also a water-cooled cooler, in this embodiment, two secondary coolers 3 are arranged in series in the sealed surge tank 2, and the secondary cooler 3 is provided with a secondary heat exchange medium inlet 31 and a secondary heat exchange medium outlet 32; the secondary heat exchange medium inlets 31 are all matched with a cold water inlet port 71 outside the integrated system, and the secondary heat exchange medium outlets 32 are all matched with a hot water outlet port 72 outside the integrated system, and the inlets and the outlets function as a first cooler. Through the action of the two secondary coolers 3, the flue gas at 60 ℃ can be sequentially cooled to the flue gas at 50 ℃ and the flue gas at 40 ℃, and meanwhile, the drainage piece 8 is arranged at the bottom of the sealed pressure stabilizing tank 2 and can discharge condensed water formed by cooling and frosting in the cooling process.

The heat exchanger 4 cools the flue gas with a refrigerant such as R22, which takes the form of a conventional horizontal structure that cools the flue gas to a temperature of 40 c to 3-10 c. In order to monitor the temperature of the heat exchanger 4 during the heat exchange process, a first temperature sensor 63 and a second temperature sensor 64 may be arranged on the heat exchanger 4 and the piping sealing the surge tank 2, the heat exchanger 4 and the filter 5, respectively.

The filter 5 is a liquid-gas separator having a filter element for mist-trapping and filtering gas and a defoaming wire mesh in the inside thereof, wherein the filter element is disposed above the inside of the filter 5, the wire mesh is disposed below the inside of the filter 5, and a liquid-gas inlet of the filter 5 is located between the filter element and the wire mesh, so that liquid water is discharged through the drain member 8 and gas is discharged from the gas outlet 51. In order to detect the pressure of the discharged gas, a second pressure sensor 62 may be attached to a pipe of the exhaust port 51.

The embodiment can be suitable for the working conditions that the mixture of nitrogen and carbon dioxide is used as an output medium, the treatment gas amount is 1300Nm3/h, the working pressure is 0-5 KPa, and the outlet gas temperature reaches 3-10 ℃.

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed", "fitted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Claims

1. An integrated system for dehydrating flue gas, comprising: comprises a primary cooler, a sealed pressure stabilizing tank, at least one secondary cooler, a heat exchanger and a filter; the secondary cooler is arranged in the sealed pressure stabilizing tank, and the primary cooler, the secondary cooler, the heat exchanger and the filter are sequentially connected in series through pipelines to cool and separate flue gas; the first-stage cooler is provided with a flue gas interface, a first-stage heat exchange medium inlet and a first-stage heat exchange medium outlet; the secondary cooler is provided with a secondary heat exchange medium inlet and a secondary heat exchange medium outlet; the flue gas interface is matched with a flue gas pipeline outside the integrated system, the primary heat exchange medium inlet and the secondary heat exchange medium inlet are matched with a cold water inlet end outside the integrated system, and the primary heat exchange medium outlet and the secondary heat exchange medium outlet are matched with a hot water outlet end outside the integrated system.

2. An integrated system for dehydrating flue gas according to claim 1, wherein: the primary cooler is a water-cooling cooler.

3. An integrated system for dehydrating flue gas according to claim 1, wherein: the secondary cooler is a water-cooling cooler, and two secondary coolers connected in series are arranged in the sealed pressure stabilizing tank.

4. An integrated system for dehydrating flue gas according to claim 2, wherein: the primary cooler has a first pressure sensor at a flue gas interface location.

5. An integrated system for dehydrating flue gas according to claim 1, wherein: the gas outlet location of the filter has a second pressure sensor.

6. An integrated system for dehydrating flue gas according to claim 1, wherein: and a first temperature sensor is arranged on a pipeline between the sealed pressure stabilizing tank and the heat exchanger.

7. An integrated system for dehydrating flue gas according to claim 1, wherein: and a second temperature sensor is arranged on a pipeline between the heat exchanger and the filter.

8. An integrated system for dehydrating flue gas according to claim 1, wherein: and the sealed pressure stabilizing tank and the filter are provided with drainage pieces.

9. An integrated system for dehydrating flue gas according to claim 1, wherein: the filter interior has a filter element disposed above the filter interior and a wire mesh disposed below the filter interior with the liquid-gas inlet of the filter between the filter element and the wire mesh.

10. An integrated system for dehydrating flue gas according to claim 1, wherein: the heat exchange medium is cooling water.