Wet-type electric precipitation energy-saving and efficiency-improving modified coupling waste heat recovery smoke plume deep treatment device

Abstract

The utility model relates to the technical field of flue gas treatment, in particular to a wet-type electric precipitation energy-saving efficiency-increasing modified coupling waste heat recovery smoke plume deep treatment device. Comprising a reactor, and an emission reduction skid, a heat exchange skid and a circulating water skid are sequentially arranged in the reactor from top to bottom; a spraying device is arranged above the emission reduction skid; the circulating water skid is connected with the spraying device; a flue gas inlet is formed in the top of the reactor; and a flue gas outlet is formed in the reactor between the heat exchange skid and the circulating water skid. By integrating the waste heat utilization and water resource recycling technology, the functions of desulfurization, dust removal, denitration synergism, waste heat and condensate water resource recycling and smoke plume comprehensive treatment are synchronously achieved, an original high-energy-consumption and high-water-consumption environment-friendly device is upgraded to an energy-saving integrated facility, and the operation cost is converted from rigid expenditure to continuous earnings; the integrated design is adopted, and the comprehensive advantages of being small in occupied space, low in investment cost, small in operation energy consumption and high in energy-saving benefit are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas treatment technical field, especially a kind of wet electric precipitation energy-saving efficiency improvement reconstruction coupling waste heat recovery depth management plume device. BACKGROUND

[0002] After the flue gas discharged by boiler is cooled and dedusted, the temperature is reduced, and the flue gas is desulfurized and further dedusted by using desulfurization tower and wet electric precipitation principle. The desulfurization tower sprays flue gas by alkaline circulating slurry to achieve the purpose of flue gas desulfurization. Wet electric precipitation collects various fine particles to dust collecting electrode by the action of high-voltage electrostatic field, and then collects by flushing to achieve the purpose of dust removal. The commonly used equipment is desulfurization tower 1 combined with wet electric precipitation equipment 2. The desulfurization tower 1 is used for desulfurization, and the wet electric precipitation equipment 2 is used for further dust removal of flue gas to ensure the cleanliness of flue gas.

[0003] The defects of the existing equipment are as follows:

[0004] (1) During the operation of the above-mentioned equipment, a desulfurization tower needs to be separately arranged for flue gas desulfurization, and process water is consumed for slurry preparation and flushing. A wet electric precipitator needs to be separately arranged for wet electric precipitation, and electric energy needs to be consumed for dust removal, and process water is consumed for flushing dust. The equipment consumes a lot of electricity and water, increases investment and operating cost, and has high cost.

[0005] (2) The flue gas treated by desulfurization and wet electric precipitation is discharged into the atmosphere, which contains a lot of heat, and the heat is directly discharged into the atmosphere, causing waste of heat.

[0006] (3) The existing device has a complex structure, and the desulfurization tower and the wet electric precipitator need to be separately arranged, which occupies a large space.

[0007] (4) After the above-mentioned equipment is treated, the consumed process water becomes water vapor in flue gas, causing white smoke phenomenon. SUMMARY

[0008] The utility model aims at overcoming the above-mentioned defects of the prior art, and provides a wet electric precipitation energy-saving efficiency improvement reconstruction coupling waste heat recovery depth management plume device. By integrating waste heat utilization and water resource recycling technology, the functions of desulfurization, dust removal, denitration efficiency improvement, waste heat and condensed water resource recycling and plume comprehensive management are realized simultaneously. The original high-energy consumption and high-water consumption environmental protection device is upgraded to an energy-saving integrated facility, so that the operating cost is changed from rigid expenditure to sustainable income. The device has the advantages of small occupied space, low investment cost, small operating energy consumption and high energy-saving income.

[0009] The utility model discloses a technical scheme is: a kind of wet electric precipitation energy-saving efficiency improvement reconstruction coupling waste heat recovery depth treatment smoke plume device, including reactor, wherein, emission reduction pry block, heat exchange pry block and circulating water pry block are sequentially arranged from top to bottom in reactor,

[0010] The upper side of emission reduction pry block is equipped with spraying device, and circulating water pry block is connected with spraying device.

[0011] The top of the reactor is equipped with flue gas inlet, and the reactor between heat exchange pry block and circulating water pry block is equipped with flue gas outlet.

[0012] In the utility model, the outside of the reactor is equipped with several steel columns, and the steel columns are connected by steel beams, and the reactor is supported by the steel columns and steel beams.

[0013] Smoke water direct contact heat exchange pipe is evenly arranged in emission reduction pry block along the direction of flue gas flow, and the pipe hole of smoke water direct contact heat exchange pipe is hexagonal, and zero-gap arrangement between heat exchange pipes is realized by hexagonal pipe hole structure design.

[0014] Smoke water direct contact heat exchange pipes are sequentially and adjacently connected, and the cross section of emission reduction pry block is honeycomb-shaped.

[0015] Heat exchange pry block includes heat exchange pipe, and heat exchange pipe is distributed in the shape of snake.

[0016] The lower end of heat exchange pipe is provided with cold water inlet, and the upper end of heat exchange pipe is provided with hot water outlet.

[0017] The circulating water pry block includes circulating water tank at the bottom of the reactor, and the upper part of the circulating water tank is connected with circulating liquid inlet on the reactor, for maintaining the alkaline state of circulating water, and the lower part of the circulating water tank is provided with circulating liquid outlet, and the circulating liquid outlet is connected with spraying device; circulating water pump is arranged on the connecting pipeline between circulating liquid outlet and spraying device.

[0018] Spraying device adopts high-efficiency atomizing spraying structure.

[0019] The utility model has the advantages of:

[0020] (1) The existing desulfurization equipment and wet electric precipitation equipment have single function, can only desulfurize / dust removal, and need multiple equipment in series; synchronous realization of desulfurization, dust removal, denitration efficiency, waste heat and condensed water resource recovery and smoke plume comprehensive treatment function upgrades original high energy consumption, high water consumption environmental protection device to energy-saving integrated facility, makes operating cost from rigid expenditure to sustainable income; intensive design, with the comprehensive advantages of less land occupation, low investment cost, small operation energy consumption and high energy-saving income;

[0021] (2) the existing wet electric dust removal equipment has high power consumption, and the device has no need of power consumption for dust removal, and the device is used for uniformly washing flue gas through the spraying device, the emission reduction pry block and the circulating water pry block, so that the purpose of saving power is achieved;

[0022] The existing desulfurization equipment and wet electric dust removal equipment only have environmental protection benefits and have no economic benefits; the application simultaneously realizes waste heat recovery and condensate water recovery, and can realize annual benefits of millions of yuan;

[0023] (3) the application realizes flue gas waste heat recovery, flue gas condensate water recovery and denitration efficiency, converts the traditional "high-cost environmental protection project" into a "high-yield energy saving + environmental protection project", and the process of recovering flue gas waste heat and flue gas condensate water can bring benefits;

[0024] (4) the existing desulfurization equipment and wet electric dust removal equipment consume process water, and the plume phenomenon is serious; the device realizes condensate water recovery, can greatly reduce the water content of flue gas, and reduce the plume;

[0025] (5) the existing desulfurization equipment and wet electric dust removal equipment are prone to corrosion of the chimney, and have high maintenance costs; the device can greatly reduce the water content in the flue gas, prolong the service life of the chimney, and reduce the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a connection structure diagram of the existing flue gas treatment equipment;

[0027] Figure 2 is a structure schematic diagram of the device;

[0028] Figure 3 is a top view structure schematic diagram of the emission reduction pry block;

[0029] Figure 4 is a structure schematic diagram of the heat exchange pry block.

[0030] In the figure: 1 is a desulfurization tower; 2 is a wet electric dust removal equipment; 3 is an emission reduction pry block; 4 is a smoke water direct contact heat exchange pipe; 5 is a heat exchange pry block; 6 is a cold water inlet; 7 is a flue gas outlet; 8 is a circulating liquid inlet; 9 is a circulating water pry block; 10 is a circulating water tank; 11 is a circulating liquid outlet; 12 is a hot water outlet; 13 is a steel column; 14 is a steel beam; 15 is a spraying device; 16 is a flue gas inlet. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, characteristics and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0032] In the following description, specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the scope of the present application. Accordingly, the present application is not limited to the specific embodiments described and shown in the following description.

[0033] As shown in Figure 2 The wet-type electric dust removal energy-saving and efficiency-improving reconstruction coupled waste heat recovery deep treatment smoke plume device includes a reactor, a plurality of steel columns 13 are arranged on the outer side of the reactor, the steel columns 13 are fixedly connected through a steel beam 14, and the steel columns 13 and the steel beam 14 play a supporting role for the whole device.

[0034] A reduction prying block 3, a heat exchange prying block 5 and a circulating water prying block 9 are sequentially arranged in the reactor from top to bottom, a flue gas inlet 16 is arranged at the top of the reactor, a spraying device 15 is arranged above the reduction prying block 3, the circulating water prying block 9 is connected with the spraying device 15, and the spraying device 15 is provided with alkali liquor for cleaning flue gas through the circulating water prying block 9.

[0035] The spraying device 15 includes a spraying pipe and a plurality of spraying heads arranged on the spraying pipe, the spraying pipe is connected with a water outlet of the circulating water prying block 9, the spraying heads are uniformly and interval arranged along the axial direction of the spraying pipe, and the spraying heads are located directly above the reduction prying block 3. The alkali liquor droplets generated after the spraying of the spraying heads directly drop into the reduction prying block 3 below.

[0036] The spraying device in the embodiment adopts an atomizing spraying structure to form uniform water mist to wash and purify flue gas in the reduction prying block. In the gas-liquid contact process, the alkaline water absorbs heat and pollutants of the flue gas and is converted into high-temperature neutral circulating water. The high-temperature water then enters the heat exchange prying block to exchange heat with cold water to realize waste heat recovery. The atomizing spraying structure is a common structure form at present, and therefore the structure of the present application will not be described in detail.

[0037] As shown in Figure 3 The reduction prying block 3 is provided with a plurality of flue gas and water direct contact heat exchange pipes 4 arranged along the flue gas direction, in the flue gas and water direct contact heat exchange pipes 4, the alkali liquor can not only clean the flue gas, but also the heat in the flue gas can be transmitted to the alkali liquor through direct contact, and the alkali liquor absorbs the heat of the flue gas to increase the temperature of the alkali liquor.

[0038] The tube hole of the smoke water direct contact heat exchange pipe 4 is hexagonal, so that there is no gap between the adjacent two heat exchange pipes, and the emission reduction pry block 3 in the application is honeycomb-shaped. After the flue gas enters the device through the flue gas inlet 16, it flows from top to bottom along the smoke water direct contact heat exchange pipe 4; at the same time, the lye produced by the spraying device also flows from top to bottom along the smoke water direct contact heat exchange pipe 4, and the lye directly contacts with the flue gas in the flowing process. Therefore, in the honeycomb-shaped emission reduction pry block 3, the lye and the flue gas can be fully contacted, and in the contact process of the lye and the flue gas, the lye washes the flue gas, achieving the effects of desulfurization, denitrification and denitration of the flue gas, and the lye absorbs the pollutants and is converted into neutral circulating water. At the same time, the circulating liquid and the flue gas are fully heat exchanged, the heat of the high-temperature flue gas is transferred to the circulating water, the temperature of the flue gas is reduced, and the temperature of the circulating liquid is increased.

[0039] The heat exchange pry block 5 is arranged below the emission reduction pry block 3, the heat exchange pry block 5 includes heat exchange pipes arranged in a snakelike manner, the lower end of the heat exchange pipe is provided with a cold water inlet 6, and the upper end of the heat exchange pipe is provided with a hot water outlet 12. The cold water enters the heat exchange pipe through the cold water inlet 6 and flows along the heat exchange pipe. At the same time, the high-temperature circulating liquid flowing out of the emission reduction pry block 3 directly drops on the outer wall of the heat exchange pipe of the heat exchange pry block 5, and at this time, the high-temperature circulating liquid exchanges heat with the cold water in the heat exchange pipe, that is, the cold water in the heat exchange pipe absorbs the heat of the high-temperature circulating liquid, and the hot water generated after the temperature of the cold water is increased flows out along the hot water outlet 12, and at the same time, the temperature of the high-temperature circulating liquid is reduced. The hot water flowing out of the heat exchange pipe can be used for municipal heating. The flowing liquid in the heat exchange pipe absorbs the heat of the high-temperature circulating liquid, and the heat of the high-temperature circulating liquid comes from the flue gas, so that the application realizes the utilization of the waste heat of the flue gas.

[0040] The flue gas outlet 7 is arranged at the side wall of the reactor below the heat exchange pry block 5, and the clean flue gas after being washed is directly discharged into the atmosphere from the flue gas outlet 7.

[0041] The circulating water pry block 9 is arranged below the heat exchange pry block 5 and at the bottom of the reactor. The circulating water pry block 9 includes a circulating water tank 10, the upper end of the circulating water tank 10 is provided with a circulating liquid inlet 8, the lower end of the circulating water tank 10 is provided with a circulating liquid outlet 11, the circulating liquid outlet 11 is connected with the spraying device 15 through a connecting pipeline, and a circulating water pump is arranged on the connecting pipeline of the circulating liquid outlet and the spraying device 15. The circulating water pump is used to pump the lye in the circulating water tank 10 out of the circulating liquid outlet 11 and into the spraying device 15, so that the circulation of the circulating liquid in the device is realized. At the same time, in order to ensure that the circulating liquid is in an alkaline state, the lye is timely supplemented into the circulating water tank 10 through the circulating liquid inlet 8.

[0042] The working principle of the device is described as follows. After the flue gas generated by coal-fired power plants, steel smelting, chemical industry and the like enters the device, firstly, the spraying device adopts a mist spraying structure and forms uniform water mist, the flue gas is washed by the alkaline and low-temperature circulating water in the emission reduction pry block 3, the effect of desulfurization, dust removal and denitration is achieved, in the gas-liquid contact process, the alkaline circulating water absorbs the heat and pollutants of the flue gas and is converted into high-temperature neutral circulating water. After the circulating water is heated, it drops to the heat exchange pry block 5, the cold water in the heat exchange pry block 5 absorbs the heat of the circulating water, the utilization of flue gas waste heat, the recovery of flue gas condensate and the white smoke elimination effect are realized, after the circulating water is cooled in the heat exchange pry block 5, the temperature of the circulating water is reduced to a low-temperature neutral state, and then the circulating water drops into the circulating water tank of the circulating water pry block 9. The pH value of the circulating water is adjusted by adding alkali liquor in the circulating water tank, so that the water body returns to a low-temperature alkaline state, and finally the circulating water is retransported to the spraying device by the circulating water pump to complete the circulation and can be used for washing flue gas heat exchange again.

[0043] In this process, in the process of treating high-temperature flue gas, the flue gas enters the device through the flue gas inlet 16, is first washed and purified by the circulating alkali liquor in the emission reduction pry block, the effect of desulfurization, dust removal and denitration is achieved, and at the same time, the flue gas heat exchange between the circulating alkali liquor and the flue gas is carried out, the sensible heat and latent heat of the flue gas are recovered, and flue gas condensate is generated; then, in the heat exchange pry block, the circulating alkali liquor recovers the sensible heat and latent heat of the flue gas recovered in the emission reduction pry block and transfers them to the cold water through the heat exchange pry block, so that the cold water becomes hot water and the utilization of flue gas waste heat is realized. Then, the washed flue gas is discharged into the atmosphere through the flue gas outlet 7.

[0044] At the same time, the circulating process of the circulating liquid is described as follows. The circulating alkali liquor is sprayed by the spraying device into the flue gas direct contact heat exchange pipe 4 of the emission reduction pry block 3, in the emission reduction pry block 3, the circulating liquid washes and purifies the flue gas, recovers the flue gas heat, and recovers the flue gas condensate, at the same time, the circulating liquid absorbs the pollutants such as flue gas and becomes neutral circulating liquid. Then the circulating liquid drops into the heat exchange pry block 5, the circulating liquid transfers the recovered flue gas heat to the cold water, realizing the utilization of flue gas waste heat. Finally, the circulating liquid falls into the circulating water tank 10, realizing the recovery of the circulating liquid, the circulating liquid recovers to the alkaline circulating liquid in the circulating water tank 10, and under the action of the circulating water pump at the circulating liquid outlet 11, it is sucked into the spraying device again, realizing the circulation of the circulating liquid.

[0045] The wet-type electric dust removal energy-saving and efficiency-improving reconstruction coupled waste heat recovery deep treatment smoke plume device provided by the utility model is described in detail. The principle and implementation mode of the utility model are described by applying specific examples. The above description of the embodiments is only used to help understand the method and core idea of the utility model. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claims. The above description of the disclosed embodiments enables the person skilled in the art to implement or use the utility model. Various modifications of the embodiments will be obvious to the person skilled in the art, and the general principle defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wet electric dust removal energy-saving and efficiency-improving reconstruction coupled with waste heat recovery deep treatment of smoke plume device, comprising a reactor, characterized in that, The reactor is provided with a reduction prizing block, a heat exchange prizing block and a circulating water prizing block from top to bottom. The reactor is provided with a flue gas inlet at the top, and a flue gas outlet between the heat exchange prizing block and the circulating water prizing block.

2. The wet electric precipitation energy-saving and efficiency-improving reconstruction coupled with waste heat recovery and deep treatment of smoke plume device according to claim 1, characterized in that, The reactor is supported by steel columns and steel beams.

3. The wet electric precipitation energy-saving and efficiency-improving reconstruction coupled with waste heat recovery and deep treatment of smoke plume device according to claim 1, characterized in that, The reduction prizing block is provided with flue gas and water direct contact heat exchange pipes arranged evenly along the flue gas direction.

4. The wet electric precipitation energy-saving and efficiency-improving reconstruction coupled with waste heat recovery and smoke plume deep treatment device according to claim 1, characterized in that, The heat exchange prizing block is provided with heat exchange pipes arranged in a serpentine shape.

5. The wet electric precipitation energy-saving and efficiency-improving reconstruction coupled with waste heat recovery and smoke plume deep treatment device according to claim 1, characterized in that, The circulating water prizing block is provided with a circulating water tank at the bottom of the reactor.

6. The wet electric precipitation energy-saving and efficiency-improving reconstruction coupled with waste heat recovery and smoke plume deep treatment device according to claim 1, characterized in that, The spraying device adopts an atomizing spraying structure.

Images