CN211936172U - An integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintering flue gas - Google Patents

Abstract

The utility model discloses an integrated device for collecting, condensing, dehumidifying and dedusting after wet desulfurization of sintering flue gas, which comprises a water washing condensing tower and a cooling water circulation component. The sintering flue gas, the cooling water circulation component is arranged outside the washing and condensing tower and is connected to it for supplying and recovering cooling water. The utility model can effectively reduce the humidity of the flue gas after the wet desulfurization of the existing sintering flue gas, so as to realize the whitening of the flue gas, and at the same time, the wet power inlet dust can be washed and pretreated to reduce the inlet dust concentration, and finally ensure the wet power Ultra-low emission of rear dust.

Description

An integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintering flue gas

technical field

The utility model belongs to the technical field of sintering flue gas treatment, in particular to an integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintering flue gas.

Background technique

In the prior art, the fluoroplastic tubular heat exchanger is used for cooling, condensing and dehumidifying technology after wet desulfurization of sintering flue gas, and the wet electrostatic precipitator is used for dust removal technology after wet desulfurization of sintering flue gas.

Fluoroplastic tubular heat exchangers have a small heat exchange temperature drop and a small humidity drop (the most economical temperature drop: 5°C, moisture content drop: 3%). If you want to unilaterally increase the flue gas humidity drop, The heat exchange area needs to be greatly increased, resulting in a great increase in the primary investment cost, and the fluoroplastic tube has low pressure resistance and high temperature resistance, and is easy to perforate and leak water, which affects the normal operation of the system.

The dust removal efficiency of the wet electrostatic precipitator is low, and the conventional efficiency is 80%. To meet the ultra-low emission requirements of outlet dust (ie, the dust concentration is ≤10mg/Nm ³ ), it is necessary to ensure that the inlet dust concentration is ≤ 50mg/Nm ³ (ie the outlet of the absorption tower). Dust concentration ≤ 50mg/Nm ³ ), while the existing sintering head electrostatic precipitator outlet has a high dust emission concentration (generally 120-150mg/Nm ³ ), and it is difficult to ensure that the dust concentration ≤ 50mg/ Nm ³ , so it is difficult to ensure that the dust concentration at the wet power outlet is less than or equal to 10 mg/Nm ³ ; to achieve the ultimate ultra-low emission of dust at the wet power outlet, it is necessary to upgrade the sintering head electrostatic precipitator to increase the specific dust collection area. It is generally difficult for the site in the sintered electrostatic precipitator to meet the requirements of renovation, and the investment cost of upgrading and renovation is relatively high.

Utility model content

In view of this, the main purpose of the present invention is to provide an integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintered flue gas.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

The embodiment of the present utility model provides an integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintered flue gas, comprising a water washing condensation tower and a cooling water circulation component, and the lower side of the tower body of the water washing condensation tower is used for introducing wet desulfurization After the sintering flue gas, the cooling water circulation component is arranged outside the water washing and condensing tower and is connected to it for supplying and recovering cooling water.

In the above scheme, the water washing condensation tower includes a tower body, a spray and gas-liquid separation mechanism, and a mist eliminator, the lower side of the tower body is provided with an air inlet, and the top is provided with an air outlet; the spray and gas-liquid separation The mechanism is arranged in the tower body from bottom to top; the mist eliminator is arranged in the tower body and above the spraying and gas-liquid separation mechanism.

In the above solution, the spraying and gas-liquid separation mechanism includes at least one gas-liquid separator and an atomized spray layer, and the gas-liquid separator and the atomized spray layer are staggered from bottom to top; the gas-liquid separation The device is connected to the return water end of the cooling water circulation assembly, and the atomized spray layer is connected to the water outlet end of the cooling water circulation assembly 2 .

In the above scheme, the atomized spray layers are evenly distributed along the radial direction of the tower body to form a high-efficiency water washing spray device; the high-efficiency water washing and spray device includes a spray pipe and a number of nozzles; the spray pipe is along the tower body. radially arranged, a plurality of nozzles are evenly arranged on the spray pipe.

In the above solution, the cooling water circulation component includes a cooling circulating water tower and a cooling circulating water pump, and the number of the cooling circulating water pumps is the same as the number of atomized spray layers in the spraying and gas-liquid separation mechanism, and the water inlet end is the same as the cooling circulating water pump. The water outlet end of the water tower is connected; the water outlet end of the cooling circulating water pump is respectively connected with the corresponding atomizing spray layer through the cooling water outlet pipeline; the return water end of the gas-liquid separator is connected with the cooling circulating water tower through the return water pipeline. Inlet connection.

In the above solution, a cooling water filter assembly is also included, and the cooling water filter assembly is connected to the cooling water circulation assembly for filtering the circulating water.

In the above solution, the cooling water filter assembly includes a shallow sand filter, the shallow sand filter is connected to the cooling circulating water tower, and the discharge end of the shallow sand filter is connected to the waste water drainage ditch.

In the above solution, the cooling circulating water tower is connected to the shallow sand filter through a drainage pump for filtering and dedusting the circulating water and discharging waste water.

Compared with the prior art, the utility model can effectively reduce the humidity of the flue gas after the wet desulfurization of the existing sintering flue gas, so as to realize the whitening of the flue gas, and at the same time, the wet power inlet dust can be washed with water to pretreat the dust, so as to reduce the amount of the flue gas. Dust concentration, and ultimately ensure ultra-low dust emission after wet electricity.

Description of drawings

1 is a schematic structural diagram of an integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintering flue gas provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

The embodiment of the present utility model provides an integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintered flue gas, as shown in FIG. The lower side of the body 11 is used to introduce the sintering flue gas after wet desulfurization. The cooling water circulation component 2 is arranged outside the water washing condensing tower 1 and is connected to it to provide and recover cooling water. After the sintering flue gas is processed by the water washing condensing tower 1 Discharge into the wet electrostatic precipitator from the top.

The water washing condensation tower 1 includes a tower body 11, a spray and gas-liquid separation mechanism 12, and a mist eliminator 13. The tower body 11 is provided with an air inlet 111 on the lower side and an air outlet 112 on the top; the spray The gas-liquid separation mechanism 12 is arranged in the tower body 11 from bottom to top; the mist eliminator 13 is arranged in the tower body 11 and is located above the spray and gas-liquid separation mechanism 12 .

The spraying and gas-liquid separation mechanism 12 includes at least one gas-liquid separator 121 and an atomized spray layer 122, and the gas-liquid separator 121 and the atomized spray layer 122 are staggered from bottom to top; The separator 121 is connected to the water return end of the cooling water circulation assembly 2 , and the atomized spray layer 122 is connected to the water outlet end of the cooling water circulation assembly 2 .

The atomized spray layer 122 is evenly distributed along the radial direction of the tower body to form a high-efficiency water-washing spray device; the high-efficiency water-washing spray device includes a spray pipe 1221 and a number of nozzles 1222; the spray pipe 1221 is along the tower body 11 . A number of nozzles 1222 are evenly arranged on the spray pipe 1221.

The cooling water circulation assembly 2 includes a cooling circulating water tower 21 and a cooling circulating water pump 22. The number of the cooling circulating water pumps 22 is the same as that of the atomizing spray layers 122 in the spraying and gas-liquid separation mechanism 12, and the water inlet ends are the same as the number of the atomizing spray layers 122. The water outlet end of the cooling circulating water tower 21 is connected; the water outlet end of the cooling circulating water pump 22 is respectively connected with the corresponding atomizing spray layer 122 through the cooling water outlet pipeline 23; The water pipeline 24 is connected to the water inlet end of the cooling circulating water tower 21 .

Further, the cooling water filter assembly 3 is also included, and the cooling water filter assembly 3 is connected to the cooling water circulation assembly 2 for filtering the circulating water.

The cooling water filter assembly 3 includes a shallow sand filter, the shallow sand filter is connected to the cooling circulating water tower 21, and the discharge end of the shallow sand filter is connected to the waste water drainage ditch.

The cooling circulating water tower 21 is connected to the shallow sand filter through the drainage pump 25 for filtering and dedusting the circulating water and discharging waste water.

The working process of the utility model:

The flue gas from the sintering machine head enters the water washing condensation tower 1 after electrostatic precipitator and wet desulfurization, passes through the gas-liquid separator 121 from the bottom to the top from the inlet flue of the tower body 11, and enters the atomizing spray layer 122, where the circulating water pump is cooled. 21 Extract the circulating cooling water at the bottom of the cooling water tower and send it to the atomization spray layer 122. The cooling water is sprayed through the atomization nozzle of the spray layer, and undergoes mass transfer and chemical absorption reaction with the countercurrent flue gas, and the flue gas transfers heat to the Cooling water, its temperature and humidity are reduced (can be reduced from 15% to below 10%), and the dust in the flue gas is captured by water washing, and the dust concentration is reduced (can be reduced from 100mg/Nm3 to below 50mg/Nm3), cooling The condensed flue gas is removed by the mist eliminator 13 and then dedusted by the wet electrostatic precipitator, and finally discharged up to the standard;

The cooling water after heat exchange and dust washing is collected by the gas-liquid separator 121 and sent to the cooling water tower 21, filtered and dedusted by the shallow sand filter, cooled down and recycled for reuse.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (8)

1. a collection condensation dehumidification and dedusting integrated device after the wet desulfurization of sintering flue gas, is characterized in that, comprises water washing condensation tower, cooling water circulation assembly, and the tower body lower side of described water washing condensation tower is used for introducing wet desulfurization After the sintering flue gas, the cooling water circulation component is arranged outside the water washing and condensing tower and is connected to it for supplying and recovering cooling water. 2. The integrated device for collecting, condensing, dehumidifying and dedusting after wet desulfurization of sintering flue gas according to claim 1, wherein the water-washing condensing tower comprises a tower body, a spray and a gas-liquid separation mechanism, and a demisting device. The lower side of the tower body is provided with an air inlet, and the top is provided with an air outlet; the spray and gas-liquid separation mechanisms are arranged in the tower body from bottom to top; the mist eliminator is arranged in the tower body and is located in the sprayer Above the shower and gas-liquid separation mechanism. 3. The integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintering flue gas according to claim 2, wherein the spraying and gas-liquid separation mechanism comprises at least one gas-liquid separator and an atomization device. The spray layer, the gas-liquid separator and the atomization spray layer are staggered from bottom to top; the gas-liquid separator is connected to the return water end of the cooling water circulation component, and the atomization spray layer is connected to the cooling water circulation component 2 is connected to the water outlet. 4. The integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintered flue gas according to claim 3, characterized in that the atomized spray layer is evenly arranged along the radial direction of the tower body to form a high-efficiency water washing spray A spray device; the high-efficiency water-washing spray device includes a spray pipe and a plurality of nozzles; the spray pipe is arranged along the radial direction of the tower body, and a plurality of nozzles are evenly arranged on the spray pipe. 5 . The integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintering flue gas according to claim 4 , wherein the cooling water circulation component comprises a cooling circulating water tower and a cooling circulating water pump, and the cooling circulating The number of water pumps is the same as the number of atomized spray layers in the spray and gas-liquid separation mechanism, and the water inlet ends are connected to the water outlet end of the cooling circulating water tower; The corresponding atomization spray layers are connected; the return water end of the gas-liquid separator is connected with the water inlet end of the cooling circulating water tower through the return water pipeline. 6. The integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintered flue gas according to any one of claims 1-5, characterized in that it further comprises a cooling water filter assembly, the cooling water filter assembly It is connected to the cooling water circulation component to filter the circulating water. 7 . The integrated device for collection, condensation, dehumidification and dust removal after wet desulfurization of sintered flue gas according to claim 6 , wherein the cooling water filter assembly comprises a shallow sand filter, and the shallow sand The filter is connected with the cooling circulating water tower, and the discharge end of the shallow sand filter is connected with the waste water drainage ditch. 8 . The integrated device for collecting condensation, dehumidification and dust removal after wet desulfurization of sintering flue gas according to claim 7, wherein the cooling circulating water tower is connected to the shallow sand filter through a drain pump for cleaning. The circulating water is filtered and dedusted and the waste water is discharged.

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