CN217367810U

CN217367810U - Flue gas condensation defogging device and system thereof

Info

Publication number: CN217367810U
Application number: CN202221238557.5U
Authority: CN
Inventors: 白宣成
Original assignee: Beijing Jiahan Network Technology Co ltd
Current assignee: Beijing Jiahan Network Technology Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-09-06
Anticipated expiration: 2032-05-20

Abstract

The utility model provides a flue gas condensation defogging device that defogging ability is strong and the energy consumption is low and system thereof. The flue gas condensation demisting device comprises a refrigerant inlet and a refrigerant outlet, and is formed by connecting U-shaped stainless steel pipes in series. Flue gas condensation defogging system, including the above the utility model provides a flue gas condensation defogging device, compressor, expansion valve and nonrust steel pipe cluster piece flue gas heater. Compared with the prior art, the technical effect of the utility model is that, introduce current wet-type desulfurization flue gas defogging system with compression refrigeration technology, make the ability of defroster condensate vapor increase at double, the density increase of dew water droplet whereabouts below the condensation defroster, speed is accelerated, and gaseous state reactivity pollutant contact reaction in whereabouts in-process and the flue gas strengthens, and increases with solid-state particle pollutant collision to defogging, dust removal and desulfurization and the efficiency of eliminating other gaseous state reactivity pollutants have been improved.

Description

Flue gas condensation defogging device and system thereof

Technical Field

The utility model relates to an environmental protection technical field is administered to the boiler flue gas, concretely relates to flue gas condensation defogging device and have its condensation defogging system.

Background

Haze has become a main problem influencing the living environment of big and medium cities in China at present. According to the research of relevant experts, the primary reason for the formation of haze weather is that the relative humidity of the near-earth air in the haze area is high, the water vapor is large, the wind speed is low, the ground dust is discharged more, the adsorption effect of the fog drops generated by the high humidity accelerates the conversion of reactive gaseous pollutants (such as SO2, CO2 and the like) to liquid particulate matters, and meanwhile, the dust particulate matters in the air are condensed with the water vapor, SO that the formation of haze is accelerated. White fog and water vapor discharged from chimneys of power generation boilers, heating boilers and other heating boilers are important reasons for increasing the relative humidity of air near the ground in winter in haze areas. At present, the first choice for treating boiler flue gas pollution is cloth bag dust removal with dust removal efficiency of 99.99% and wet desulphurization with desulphurization efficiency of more than 95%. However, in wet desulphurization, high-temperature flue gas is subjected to multi-layer spray desulphurization, and a large amount of water vapor is taken away by the flue gas to form dense fog. At present, the conventional demisting method is to arrange a double-layer curved plate demister in a desulfurizing tower. The high wet flue gas that sprays behind the desulfurization flows through the bent plate defroster with certain speed, and the flue gas is by quick, change direction of motion in succession, and because of centrifugal force and inertial effect, the fog in the flue gas is strikeed on the defroster blade and is got off by the entrapment, collects and forms the rivers, in the effect of gravity falls to the desulfurization tower bottom, has realized partial gas-liquid separation. But because the temperature of the flue gas is still higher when the flue gas passes through the demister, more water vapor is still carried away by the flue gas, and the fog of the chimney is still obvious.

SUMMERY OF THE UTILITY MODEL

Based on this, for solving the technical defect and not enough that prior art exists, the utility model provides a flue gas condensation defogging device and system that defogging ability is strong and the energy consumption is low.

The utility model provides a flue gas condensation defogging device, includes refrigerant import and refrigerant export, and flue gas condensation defogging device is concatenated by the nonrust steel pipe of U type and is formed.

The utility model provides a flue gas condensation defogging system, includes the aforesaid the utility model provides a flue gas condensation defogging device, compressor, expansion valve and nonrust steel pipe cluster piece flue gas heater.

Preferably, the refrigeration compressor, the stainless steel tube serial sheet flue gas heater, the expansion valve and the flue gas condensation demisting device are sequentially connected along the flow direction of a refrigerant to form a closed loop pipeline.

The cooling medium inlet of the smoke condensation demisting device is connected with the expansion valve, the cooling medium outlet of the smoke condensation demisting device is connected with the refrigeration compressor, the cooling medium inlet of the stainless steel tube string piece smoke heater is connected with the refrigeration compressor, and the cooling medium outlet of the stainless steel tube string piece smoke heater is connected with the expansion valve.

Preferably, the flue gas condensation defogging device is two, and two flue gas condensation defogging devices set up in parallel and set up along the flue gas direction of motion interval.

Preferably, flue gas condensation defogging device is a plurality of, and a plurality of flue gas condensation defogging device parallel arrangement just set up along flue gas direction of motion interval.

Preferably, the stainless steel pipe serial piece flue gas heater is arranged at the outlet of the desulfurizing tower or the inlet of a chimney.

Compared with the prior art, the utility model discloses a technological effect does:

1. the compression refrigeration technology is introduced into the existing wet-type desulfurization flue gas demisting system, so that the water vapor condensation capacity of the demister is multiplied, the falling density of dew water drops below the condensation demister is increased, the falling speed is accelerated, the contact reaction with gaseous reactive pollutants in flue gas is increased in the falling process, and the collision with solid particle pollutants is increased, so that the efficiency of demisting, dedusting and desulfurizing and eliminating other gaseous reactive pollutants is improved;

2. the flue gas with relatively dry and low temperature is heated by the flue gas heater arranged at the outlet of the desulfurizing tower, so that the temperature is increased, the flue gas humidity is reduced again, and the generation of haze is effectively reduced.

3. The flue gas heater and the flue gas condensation defroster at the outlet of the desulfurizing tower or the inlet of the chimney form a closed-loop system, the energy efficiency ratios of the compression refrigeration system and the heating system are respectively more than 3, the energy consumption is saved, the structure is compact, and the demisting and whitening effects of the chimney are improved.

Drawings

FIG. 1 is a schematic diagram of a prior art desulfurization tower;

FIG. 2 is a schematic view of a flue gas condensing and demisting device provided by the present invention;

fig. 3 is a schematic diagram of a system having the flue gas condensing demisting device of fig. 2.

Wherein the reference numbers of the figures represent the following:

10 a flue gas condensation demisting device; 101 a refrigerant inlet; 102 a refrigerant outlet;

20 a refrigeration compressor; 30 an expansion valve; 40 stainless steel tube serial slice smoke heater;

1 double-layer stainless steel curved blade demister; 2, a double-layer spraying device; 3, a smoke outlet; 4 a flue gas inlet.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to FIG. 1, FIG. 1 shows a schematic diagram of a prior art desulfurization tower. Flue gas gets into the desulfurizing tower from flue gas inlet 4, through double-deck spray set 2, rises to defroster 1 department, and is discharged through exhanst gas outlet 3 at last. The demister 1 in the prior art adopts a bent blade demister, the bent blade demister is divided into an upper layer and a lower layer in a desulfurizing tower or a chimney, and the interval between the upper layer and the lower layer is about two meters.

Referring to fig. 2, fig. 2 shows the utility model provides a flue gas condensation defogging device 10, including refrigerant import 1 and refrigerant export 2, above-mentioned flue gas condensation defogging device 10 concatenates by the nonrust steel pipe of U type and forms, forms the crooked blade flue gas condensation defogging device of stainless steel.

Referring to fig. 3, fig. 3 shows a demisting system with a flue gas condensation demisting device provided by the present invention, which comprises the above flue gas condensation demisting device 10, a refrigeration compressor 20, an expansion valve 30, and a stainless steel pipe serial piece flue gas heater 40. The refrigerant inlet of the flue gas condensation demisting device 10 is connected with the expansion valve 30, the refrigerant outlet of the flue gas condensation demisting device 10 is connected with the refrigeration compressor 20, the refrigerant inlet of the stainless steel tube serial piece flue gas heater 40 is connected with the refrigeration compressor 20, the refrigerant outlet of the stainless steel tube serial piece flue gas heater 40 is connected with the expansion valve 30, namely, the refrigeration compressor 20, the stainless steel tube serial piece flue gas heater 40, the expansion valve 30 and the flue gas condensation demisting device 10 are sequentially connected along the refrigerant flowing direction, and a closed-loop pipeline is formed. The two flue gas condensation demisting devices 10 are arranged in parallel and are arranged at intervals along the moving direction of the flue gas. The stainless steel tube serial slice flue gas heater 40 is arranged at the outlet of the desulfurizing tower or the inlet of a chimney.

The following introduces the utility model provides a flue gas condensation defogging system's working process.

As shown in fig. 3, when the refrigeration compressor 20 works, high-temperature and high-pressure refrigerant gas starts from the refrigeration compressor 20, enters the stainless steel tube serial sheet flue gas heater 40 for heat dissipation, is changed into low-temperature and high-pressure liquid, is subjected to shutoff expansion by the expansion valve 30, is changed into lower-temperature and lower-pressure gas, enters the flue gas condensation demisting device 10 for refrigeration, and returns to the refrigeration compressor 20. The circulation is reciprocal like this, and the flue gas is earlier through the interior flue gas condensation defogging device 10 cooling of desulfurizing tower and collision defogging, and the dry flue gas of stainless steel pipe string piece flue gas heater 40 heating that installs at the desulfurizing tower export is passed through again, reaches the effect that reduces the white fog and generate.

The utility model discloses in, the quantity of flue gas condensation defogging device 10 is unrestricted, and quantity is more, and its condensation defogging effect is better. Preferably, the number of the flue gas condensation demisting devices 10 is more than 2, and when a plurality of condensation demisting devices 10 are arranged, the condensation demisting devices 10 are arranged in parallel and are arranged at intervals along the movement direction of the flue gas.

The utility model discloses in placing a system in compression refrigerating system's refrigeration, heating function simultaneously, the defogging of refrigerating earlier, the dry flue gas of back heating, the comprehensive utilization energy, the efficiency ratio is greater than 6. The smoke emission system is a comprehensive measure integrating energy conservation, low carbon, high efficiency and environmental protection, is widely applied to smoke emission systems of power generation, heating and other heating boilers, has small electricity consumption, less emission, strong demisting capability and good haze treatment effect, and obviously improves the efficiency of dedusting, desulfurizing and eliminating other gaseous pollutants (NO, CO and CO 2).

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The flue gas condensation demisting device is characterized by comprising a refrigerant inlet and a refrigerant outlet, and is formed by connecting U-shaped stainless steel pipes in series.

2. A flue gas condensation demisting system, which is characterized by comprising the flue gas condensation demisting device, a refrigeration compressor, an expansion valve and a stainless steel tube serial sheet flue gas heater in claim 1.

3. The flue gas condensing and demisting system according to claim 2, wherein the refrigeration compressor, the stainless steel tube serial sheet flue gas heater, the expansion valve and the flue gas condensing and demisting device are connected in sequence along a refrigerant flowing direction to form a closed loop pipeline.

4. The flue gas condensing and demisting system according to claim 3, wherein a refrigerant inlet of the flue gas condensing and demisting device is connected to the expansion valve, a refrigerant outlet of the flue gas condensing and demisting device is connected to the refrigeration compressor, a refrigerant inlet of the stainless steel tube serial sheet flue gas heater is connected to the refrigeration compressor, and a refrigerant outlet of the stainless steel tube serial sheet flue gas heater is connected to the expansion valve 30.

5. The flue gas condensing and demisting system according to claim 2, wherein the number of the flue gas condensing and demisting devices is two, and the two flue gas condensing and demisting devices are arranged in parallel and are arranged at intervals along the moving direction of the flue gas.

6. The flue gas condensing and demisting system according to claim 2, wherein the flue gas condensing and demisting device is provided in plurality, and the flue gas condensing and demisting devices are arranged in parallel and are arranged at intervals along the moving direction of the flue gas.

7. The flue gas condensing demisting system according to claim 2, wherein the stainless steel tube serial sheet flue gas heater is disposed at an outlet of a desulfurizing tower or an inlet of a chimney.