CN218687845U

CN218687845U - Self-cleaning self-holding one-step purification equipment

Info

Publication number: CN218687845U
Application number: CN202222424655.4U
Authority: CN
Inventors: 闫鹏; 贾宁; 杨永; 杨沛森; 马炎; 李小斌; 杨久俊; 赵立康; 梁川
Original assignee: Tianjin Chaoyang Environmental Protection Technology Group Co Ltd
Current assignee: Tianjin Chaoyang Environmental Protection Technology Group Co Ltd
Priority date: 2021-09-14
Filing date: 2022-09-14
Publication date: 2023-03-24
Anticipated expiration: 2032-09-14
Also published as: CN115475475A; CN218687851U; CN218687850U; CN219209450U; CN115569483A; CN219209449U; CN219223350U; CN218687846U; CN115671940A; CN115475474A; CN115671939A; CN115540621A; CN219223351U; CN115591359A; CN115574615A; CN218687849U; CN115569481A; CN218687847U; CN115569482A; CN115569480A

Abstract

The application discloses self-cleaning self-sustaining one-step purification equipment, which is used for purifying flue gas containing water vapor, ammonia gas and acidic pollutants; the purification apparatus includes: the box body is provided with a smoke air inlet, a smoke air outlet and a smoke channel formed from the smoke air inlet to the smoke air outlet; the low-temperature condensation module is communicated with the cooling water inlet and the cooling water return port; the low-temperature condensation module is used for cooling and condensing the flue gas entering the flue gas purification channel from the flue gas air inlet, condensing water vapor into condensed water, dissolving ammonia gas and acidic pollutants in the condensed water, and performing acid-base neutralization reaction in the condensed water to generate non-volatile salt which is easily dissolved in the condensed water; and the spraying and washing device is arranged at the flue gas air inlet and is used for spraying washing water to the flue gas air inlet, and the washing water rapidly enters the low-temperature condensation module along with the flue gas air to wash the surface of the water pipe of the cooling water pipe bundle.

Description

Self-cleaning self-holding one-step purification equipment

Technical Field

The application relates to the technical field of environmental protection equipment, in particular to self-cleaning self-sustaining formula one-step method clarification plant.

Background

At present, most of cement kiln tail gas NOx treatment technologies still adopt ammonia sources (ammonia water, urea and the like) reducing agents, and due to the limitation of denitration rate, the ammonia escape phenomenon exceeding or even seriously exceeding national standard regulation indexes (less than 8mg/m & lt 3 & gt) caused by excessive use of the reducing agents exists more or less, so that secondary pollution to the atmosphere is caused.

The known prior art discloses a recovery and circulation system of escaped ammonia in cement kiln ammonia process denitration tail gas and a control method thereof. Conveying the denitration tail gas in the flue to a heat exchanger by a fan for cooling, and then entering the tower from the bottom of a spraying tower; then pumping the absorbent in the storage tank to a spray tower by a pump to perform contact reaction with the denitration tail gas from bottom to top, so as to obtain an ammonia-containing absorbent and deamination tail gas; then, the ammonia-containing absorbent flows into a receiving tank, and supernatant after precipitation enters a spray tower through a pump to repeatedly contact with the denitration tail gas until a saturated ammonia absorbent is formed; receiving the mud settled at the bottom of the tank bottom and periodically pumping the mud to the cement kiln; the saturated ammonia absorbent is pumped to an ammonia water storage tank and mixed with ammonia water for denitration reaction, and ammonia separated from ammonium salt in the SNCR process is used as a part of ammonia source to react with nitrogen oxide, so that the escaped ammonia is recycled.

Although the problem of ammonia escape can be solved in the prior art, the deamination efficiency is low, the equipment volume is large, the cost is high, and the specific analysis is as follows:

1. in the prior art, the tail gas treatment needs heat exchange firstly and then spraying, and then collecting and recycling, and the treatment steps lead to complex deamination process and low deamination efficiency.

2. This prior art tail gas can only realize limited cooling through the heat exchanger before getting into the spray column, the purpose is because high temperature ammonia volatilizees easily, be unfavorable for being absorbed in the spray column, it can improve the absorption efficiency of spray column to ammonia to cool down high temperature tail gas through preceding heat exchanger, on the other hand can alleviate spray column operating pressure through the leading cooling processing of heat exchanger, reduce the water yield that sprays of spray column promptly, but adopt the spray column to inhale ammonia, it is still huge to spray the water yield, this received volume that has also caused the follow-up receiving tank of this prior art is big, equipment is bulky, and it is huge to the handling capacity that contains ammonia absorbent circulation entering spray column.

3. The inflow of the prior art ammonia-containing absorbent into the receiver tank requires a long time of precipitation, further resulting in a decrease in the efficiency of the prior art deamination.

Therefore, in summary, the recovery and circulation system of escaped ammonia in the prior art has the problems of complex process, low deamination efficiency, large equipment volume, high cost and large wastewater treatment capacity.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the problem that the existing technology of the clarification plant of escape ammonia among the prior art is complicated, the deamination is efficient, equipment is bulky, with high costs to a self-cleaning self-sustaining formula one-step method clarification plant is provided.

In order to achieve the above object, the present application provides a self-cleaning self-sustaining one-step purification apparatus for purifying flue gas containing water vapor, ammonia gas and acidic pollutants; the purification apparatus includes:

the box body is provided with a flue gas air inlet, a flue gas air outlet and a flue gas channel formed from the flue gas air inlet to the flue gas air outlet;

the low-temperature condensation module is communicated with the cooling water inlet and the cooling water return port; the low-temperature condensation module comprises cooling water pipe bundles which are vertically arranged in the flue gas purification channel and are arranged in an array manner and end joint components communicated with the upper end part and the lower end part of the cooling water pipe bundles, and the end joint components and the cooling water pipe bundles form a cooling water circulation pipeline for cooling water to flow from the cooling water inlet to the cooling water return port; the low-temperature condensation module is used for cooling and condensing the flue gas entering the flue gas purification channel from the flue gas air inlet, condensing the water vapor into condensed water, dissolving the ammonia gas and the acidic pollutants in the condensed water, and performing acid-base neutralization reaction in the condensed water to generate non-volatile salt which is easily dissolved in the condensed water;

and the spraying and washing device is arranged at the flue gas air inlet and is used for spraying washing water to the flue gas air inlet, and the washing water quickly enters the low-temperature condensation module along with the flue gas air to wash the surface of the water pipe of the cooling water pipe bundle.

Optionally, also comprises

And the atomizing device is arranged at the flue gas air inlet and used for atomizing water at the flue gas inlet so as to increase the content of water vapor in the flue gas.

Optionally, the atomized water of the atomization device is added with an agent for deammoniation and/or desulfurization and/or denitrification.

Optionally, the bundles of cooling water tubes are arranged in an array of interdigitated bundles.

Optionally, the cooling water tube bundle is divided into a plurality of cooling water tube groups along the flue gas flowing direction, each cooling water tube group comprises a plurality of rows of cooling water tubes arranged along the flue gas flowing direction, and two adjacent rows of cooling water tubes in the plurality of rows of cooling water tubes are arranged in the flue gas flowing direction in a staggered manner and have no gap between orthographic projection surfaces.

Optionally, three cooling water pipes, which are adjacent to each other, in two adjacent rows of the cooling water pipes form a cooling water pipe unit arranged in a triangular manner, and the arrangement size range of the cooling water pipe unit is as follows:

C＝1.8A～2A；

D＝0.8B～1.5B；

wherein A is the maximum width dimension of the tube cross section; b is the maximum length size of the pipe section; c is the size of the center distance of the pipe sections of two adjacent cooling water pipes in the same row; d is the center distance size of the tube sections of the adjacent rows of cooling water tubes.

Optionally, the cooling water pipe is a circular arc rhombus cooling water pipe, the circular arc rhombus cooling water pipe includes: the cooling water pipe body is characterized in that the cross section of the cooling water pipe body is in an arc rhombus shape, two ends of a short diagonal line of the cooling water pipe body are arc ends respectively, and two ends of a long diagonal line of the cooling water pipe body are tip ends respectively; the arc ends at the two ends of the short diagonal line are connected with the tip ends at the two ends of the long diagonal line through straight edges respectively, and the straight edges are tangent to the arc lines of the arc ends.

Optionally, the arc ends at the two ends of the short diagonal line are concentrically arranged; and/or the connecting line of the middle points of the arc ends at the two ends of the short diagonal line is vertical to the connecting line of the tip ends at the two ends of the long diagonal line.

Optionally, the end joint assemblies include an upper end joint assembly and a lower end joint assembly, the upper end joint assembly and the lower end joint assembly are sequentially and alternately arranged above and below the cooling water tube bundle along the flue gas circulation direction, and each end joint penetrates through the ends of the multiple rows of cooling water tubes to form a parallel pipeline for enabling at least two rows of parallel water flows to flow in the same direction in the cooling water tube bundle; the upper end assembly is an upper header tank, the lower end assembly is a lower header tank, the upper header tank comprises a plurality of upper header tank subsections which are arranged above the cooling water pipe bundle along the smoke circulation direction and serve as the end connectors, the lower header tank comprises a plurality of lower header tank subsections which are arranged below the cooling water pipe bundle along the smoke circulation direction and serve as the end connectors, the plurality of rows of cooling water pipes communicated with each header tank subsection comprise water inlet pipelines and water outlet pipelines which are arranged side by side along the smoke circulation direction, and the rows of the water inlet pipelines and the water outlet pipelines are the same; one of the upper water collecting tank and the lower water collecting tank further comprises a cooling water inlet tank communicated with the cooling water inlet, the other one of the upper water collecting tank and the lower water collecting tank further comprises a cooling water return tank communicated with the cooling water return port, and the cooling water inlet tank and the cooling water return tank are respectively correspondingly communicated with at least two rows of cooling water pipes; the cooling water bank of tubes is divided into a plurality of cooling water nest of tubes along flue gas circulation direction, every the cooling water nest of tubes includes the edge the multirow cooling water pipe that the flue gas circulation direction was arranged, and every the cooling water nest of tubes corresponds and communicates a set ofly the cooling water inlet with the cooling water return water mouth, it is a plurality of cooling water between the cooling water nest of tubes is in the cooling water is restrainted and is not communicated in the beam.

Optionally, the cooling water flow rate of the cooling water pipe group close to the flue gas air outlet is smaller than the cooling water flow rate of the cooling water pipe bundle close to the flue gas air inlet.

Optionally, the cooling water system further comprises a cooling water inlet manifold, and the cooling water inlet manifold is communicated with each cooling water inlet through a flow regulating valve.

Optionally, the condensation water collecting device is arranged at the bottom of the low-temperature condensation module and used for collecting the condensation water, and the condensation water collecting device is connected with a condensation water discharge port.

The second aspect of the application provides a purification process using the self-cleaning self-sustaining one-step purification equipment, which comprises the following steps:

installing the self-cleaning self-sustaining one-step purification equipment to a smoke outlet of smoke emission equipment to be purified, and enabling the smoke air inlet of the self-cleaning self-sustaining one-step purification equipment to be in sealing connection with the smoke outlet of the smoke emission equipment to be purified;

starting the self-cleaning self-sustaining one-step purification equipment to work, cooling the flue gas to condense the water vapor in the flue gas into condensed water, dissolving ammonia gas and acidic pollutants in the flue gas into the condensed water to generate acid-base neutralization reaction to generate non-volatile salt which is easily dissolved in the condensed water;

and spraying cleaning water to the flue gas air inlet, wherein the cleaning water scours the surface of the cooling water pipe of the low-temperature condensation module along with the flue gas so as to scour away the particles adhered to the surface of the water pipe.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and the description of the exemplary embodiments of the present application are provided for explaining the present application and do not constitute an undue limitation on the present application. In the drawings:

FIG. 1A is a schematic view of a self-sustaining one-step purification process according to an embodiment of the present application;

FIG. 1B is a schematic structural diagram (front view) of a self-contained one-step purification apparatus according to an embodiment of the present application;

FIG. 1C is a top view of FIG. 1B;

FIG. 1D is a block diagram (front view) of a self-contained one-step purification apparatus according to an embodiment of the present application;

FIG. 1E is a side view of FIG. 1D;

FIG. 2A is a schematic structural diagram (front view) of a self-sustaining one-step purification apparatus (circular tube) according to an embodiment of the present disclosure;

FIG. 2B is a top view of FIG. 2A;

FIG. 2C is a block diagram (front view) of a self-contained one-step purification apparatus (grouping of round tubes) according to an embodiment of the present application;

FIG. 2D is a top view of FIG. 2C;

FIG. 2E is a perspective view of a self-contained one-step purification apparatus (grouping of round tubes) according to an embodiment of the present application;

FIG. 3A is a front view of a cryocondensation module (cooling water circulating along grouped water lines) according to an embodiment of the present application;

FIG. 3B is a top view of FIG. 3A;

FIG. 3C is a left side view of FIG. 3A;

FIG. 3D is a perspective cross-sectional view of a cryocondensation module (cooling water circulating along grouped water lines) according to an embodiment of the present application;

FIG. 4A is a front view of a cryocondensation module (cooling water circulates along the grouped water pipes in each straight-through zone and the amount of cooling water is adjustable) according to an embodiment of the present application;

FIG. 4B is a top view of FIG. 4A;

FIG. 4C is a left side view of the cryocondensation module (cooling water circulates along the water grouping pipes in the straight-through zones and the amount of cooling water is adjustable) according to the embodiment of the present application;

FIG. 5A is a front view of a cryocondensation module (straight-through zones with adjustable cooling water) according to an embodiment of the present application;

FIG. 5B is a top view of FIG. 5A;

FIG. 5C is a left side view of FIG. 5A;

FIG. 6A is a front view of a cryocondensation module (cooling water circulates along the water grouping pipes in straight-through zones and the amount of cooling water is adjustable) according to an embodiment of the present application;

FIG. 6B is a top view of FIG. 6A;

FIG. 6C is a left side view of FIG. 6A;

FIG. 6D is a perspective sectional view of a cryocondensation module (cooling water for each straight-through zone circulates along a grouped water pipe and the amount of cooling water is adjustable) according to an embodiment of the present application;

FIG. 7A is a top view of a rounded diamond tube according to an embodiment of the present application;

FIG. 7B is a front view of a rhomboid-shaped tube of an embodiment of the present application;

FIG. 7C is a cross-sectional view of a rounded diamond tube according to an embodiment of the present application;

FIG. 8 is a diagram of an arrangement of rounded diamond tubes according to an embodiment of the present application;

FIG. 9A is a front elevational view of a circular diamond tube expander in accordance with an embodiment of the present application;

FIG. 9B is a partial enlarged view of FIG. 9A;

FIG. 10A is a front view of an embodiment of the present application after expansion of a radius diamond shaped tube;

FIG. 10B is a partial enlarged view of FIG. 10A;

FIG. 10C is a top view of FIG. 10A;

FIG. 11A is a front view of a modular self-contained one-step purification apparatus of an embodiment of the present application;

FIG. 11B is a top view of a modular self-contained one-step purification apparatus according to an embodiment of the present application;

FIG. 11C is a left side view of the modular self-contained one-step purification apparatus of an embodiment of the present application;

FIG. 12 is a schematic view illustrating a structure of a demisting and water collecting baffle according to an embodiment of the present application;

fig. 13 is a simplified schematic diagram of the convective heat transfer of the cryocondensation module according to an embodiment of the present application.

The low-temperature condensation system comprises a low-temperature condensation module 1, a box 101, an upper box plate 1011, a lower box plate 1012, a front box plate 1013, a rear box plate 1014, a cooling water pipe bundle 102, a cooling water pipe 102a, a cooling water pipe 1020, a large arc end 1020b, a small arc end 1020a, a straight edge 1020c, a plug 1022, a cooling water inlet pipe 103, a 1031 flow regulating valve, a cooling water inlet manifold 1032, a water distribution pipe 1033, a cooling water return pipe 104, a pipe elbow 105, a spray device 2, an atomization device 3, a flue gas inlet 4, a flue gas outlet 5, a water pump 9, a condensate water outlet 10, an upper water box 11, an upper water box branch 111, a lower water box 12, a lower water box branch 121, a demisting water collection plate 13, a steel wire mesh 14, a rubber gasket 15, a sealant 16, a ring groove 17, a ring protrusion 18, a ring clamping protrusion 19, a mounting foundation 20, a lower joint 21, a plug 211 plug 212, a sealing ring, a 213 joint, an upper joint 22, a condensate water collection device 23, a cooling water pipe 24, a cooling water inlet 103a cooling water return port 104a cooling water inlet, and a water return hole 102 b.

Detailed Description

In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the application herein.

In this application, the terms "upper", "lower", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "disposed," "provided," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

At present, most of high-temperature flue gas treatment technologies such as cement kiln flue gas NOx treatment technologies still adopt ammonia sources (ammonia water, urea and the like) reducing agents, and due to the limitation of denitration rate, the reducing agents are used in excess more or less, so that the reducing agents exceed or even seriously exceed national standard specified indexes (less than 8 mg/m) ³ ) The ammonia escape phenomenon, and secondary pollution of the atmosphere.

The known prior art discloses a recovery and circulation system for escaping ammonia in denitration flue gas by a cement kiln ammonia method and a control method thereof, wherein the recovery and circulation system comprises a spray tower, a heat exchanger, a storage tank and a receiving tank. The denitration flue gas is conveyed to a heat exchanger by a fan to be cooled, then enters the tower from the bottom of a spray tower, an absorbent in a storage tank is pumped to the spray tower by a pump to be in contact reaction with the denitration flue gas from bottom to top to obtain an ammonia-containing absorbent and deamination flue gas, then the ammonia-containing absorbent flows into a receiving tank, supernatant after precipitation is recycled by the pump to enter the spray tower to be in repeated contact with the denitration flue gas until a saturated ammonia absorbent is formed, slurry settled at the bottom of the receiving tank is periodically pumped to a cement kiln by the pump, the saturated ammonia absorbent is pumped to an ammonia water storage tank to be mixed with ammonia water for denitration reaction, ammonia salt is decomposed into ammonia in an SNCR (selective non-catalytic reduction) denitration process to serve as a part of ammonia source to react with nitrogen oxide, and accordingly, the recycling of escaped ammonia is achieved.

Although the prior art can solve the problem of ammonia escape, the prior art has the defects of low deamination efficiency, large equipment volume and high cost, and the specific analysis is as follows:

1. this prior art needs earlier the heat transfer to flue gas treatment and then sprays the back and collect recycle, and the processing step leads to the deamination technology complicacy more, and the deamination is inefficient, and because the technology is complicated, needs to use heat exchanger, spray column, holding vessel, receiving tank etc. and leads to whole deamination equipment bulky, with high costs.

2. This prior art discloses that the flue gas is carried earlier to the heat exchanger cooling, but understand from the whole technical scheme that this prior art disclosed and can draw, this prior art adopts preceding heat exchanger to carry out the purpose of cooling to the flue gas on the one hand is in order to avoid volatilizable high temperature ammonia to be difficult to absorb by the absorbent in follow-up spray column technology, and carry out limited cooling to high temperature flue gas through preceding heat exchanger and can improve the absorption efficiency of spray column to ammonia, on the other hand can alleviate spray column operating pressure through the leading cooling of heat exchanger to high temperature ammonia, but this prior art still adopts the spray column to explain that this prior art solves the means of ammonia escape problem still is traditional spray column ammonia absorption thinking, and it is big then to have the volume of spraying water to adopt the spray column, the big problem of follow-up sewage purification capacity.

3. The flow of this prior art ammonia-containing absorbent into the receiving tank requires a long time of precipitation, further resulting in low deamination efficiency of this prior art.

In order to solve the problems of ammonia escape and complex process, low deamination efficiency, large equipment volume, high cost and large wastewater treatment capacity of a deamination system in the prior art, the application provides self-sustaining one-step purification equipment and a purification method, wherein the self-sustaining one-step purification equipment and the purification method have the advantages that the components in the flue gas to be treated can automatically complete physical and chemical reactions to realize ammonia absorption (self-sustaining type), the equipment volume is small (compact type), the process is simple (one-step method), the cost is low, and the wastewater treatment capacity is small. The purification equipment provided by the application not only can be applied to cement kiln flue gas purification scenes, but also can be applied to scenes such as power plants or coal yard flue gas purification. It should be noted, however, that the purification device provided by the present application can only be applied to the purification treatment of flue gas containing water vapor, ammonia gas and acidic pollutants.

As a preferred embodiment of the application, the purification equipment is applied to the purification of the cement kiln ammonia denitration flue gas. At present, the condition of ammonia escape generally exists in the flue gas of the cement kiln, and the flue gas discharged by the cement kiln is high-temperature flue gas containing water vapor, ammonia gas and acidic pollutants.

The clarification plant of this embodiment has flue gas air intake 4, gas outlet 5 and certainly 4 extremely gas outlet 5's gas cleaning passageway, clarification plant still includes cryocondensation module 1, and cryocondensation module 1 sets up in the gas cleaning passageway.

The main structure of the purification equipment can realize the purification treatment of the cement kiln flue gas, and the purification principle is as follows:

in cement kiln flue gas entered into the flue gas purification passageway from clarification plant's flue gas air intake 4, cryocondensation module 1 in the flue gas passageway was to the entering the flue gas is cooled down and is condensed the vapor in the flue gas into the comdenstion water (the ideal state is hoped to condense whole vapor into the comdenstion water), and the ammonia that contains in the flue gas and be acid pollutant (such as SO2 and CO 2) dissolve in the comdenstion water (physical purification), this is the first layer purification that this application clarification plant realized, but because the flue gas temperature is higher, the ammonia that dissolves in the comdenstion water or be acid pollutant and volatilize out from the comdenstion water easily, but this application clarification plant innovation point is that dissolve ammonia and be acid pollutant in the comdenstion water simultaneously and take place acid-base neutralization reaction (chemical purification) and generate the non-volatile salt that easily dissolves in the comdenstion water.

The low temperature condensation module 1 can be multiple in this application clarification plant, for example, oily self-cooling cryocondensation, freezing formula cryocondensation etc.. As a preferred embodiment of the present application, the cryocondensation module 1 employs water-cooled cryocondensation. The purifying equipment is provided with a cooling water inlet 103a and a cooling water return port 104a, and the low-temperature condensation module 1 is communicated with the cooling water inlet 103a and the cooling water return port 104a. The low-temperature condensation module 1 includes cooling water tube bundles 102 vertically arranged in the flue gas purification channel and arranged in an array, and end joint components communicated with upper and lower ends of the cooling water tube bundles 102, where the end joint components and the cooling water tube bundles 102 together form a cooling water circulation pipeline for cooling water to flow from the cooling water inlet to the cooling water return port.

After entering the flue gas purification channel from the flue gas inlet 4, the flue gas is in full contact with the surface of the cooling water tube bundle 102 flowing through the cooling water, and water vapor in the flue gas is condensed into condensed water on the surface of the water tube of the cooling water tube bundle 102 and flows to the bottom of the purification equipment along the surface of the cooling water tube. Because the cooling water of the present application is not in direct contact with the flue gas, the cooling water in the cooling water tube bundle 102 is not polluted and is recycled all the time after being cooled. And through calculation, the cooling water consumption and the consumption of the cooling water bundle 102 are far less than the water consumption and the consumption of a spray tower in the prior art, and the condensed water of the purification equipment can completely make up the volatile water amount in the cooling process of the cooling water after being purified and recovered.

Fig. 1B shows the working principle of the purification apparatus of the present application. This application clarification plant can cooperate water pump 9, cooling water circulation pipeline and cooling tower to use. The water pump 9 supplies driving force to the cooling water entering from the cooling water inlet 103a through the cooling water inlet pipeline 103 of the cooling water circulation pipeline, the cooling water flows in the cooling water circulation pipeline and then flows out from the cooling water outlet 104a to enter the cooling tower, and the water of the cooling tower flows back to the water pump 9, so that cooling water circulation is realized. The cement kiln flue gas enters the low-temperature condensation module 1 through the flue gas inlet 4 of the low-temperature condensation module 1 to fully exchange heat with the cooling water tube bundle 102, the cooling water tube bundle 102 rapidly cools the flue gas, and importantly, the cooling water tube bundle 102 cools and condenses the water vapor of the high-temperature flue gas into condensed water, and the condensed water adsorbs alkaline ammonia molecules (ammonia gas), cement raw meal dust (calcium-containing) and acidic SO contained in the flue gas ₂ With CO ₂ And the like. Basic ammonia molecules and cement raw dust, and acidic SO ₂ With CO ₂ Acid-base neutralization in condensed waterThe reaction forms non-volatile salts such as ammonium bisulfate, ammonium bicarbonate, calcium sulfate and calcium carbonate.

This application clarification plant still includes comdenstion water collection device 23, sets up in the 1 bottom of low temperature condensation module, and comdenstion water discharge port 10 is connected to comdenstion water collection device 23. The condensed water generated on the surface of the cooling water tube bundle 102 flows to the bottom of the purification equipment along the surface of the water tube, and then is collected by the condensed water collecting device 23, and finally is discharged outside through the condensed water discharging port 10.

Further, the discharged condensed water can be treated into recyclable or discharged purified water (about 90%) and high-concentration water containing salt (the content of salt dust is less than 3%) in an amount of about 10% by a membrane separation method, the high-concentration water containing salt is pumped and sprayed onto a clinker grate cooler at the kiln head of the cement kiln, on one hand, clinker can be rapidly cooled, on the other hand, calcium sulfate and calcium carbonate substances in water are attached to the surface of the clinker and are taken out to become a component of cement, and ammonium salt in the water is rapidly heated and decomposed into ammonia and SO through the clinker to form ammonia and SO ₂ Then enters a decomposing furnace of the cement kiln along with the tertiary air, wherein ammonia molecules are utilized in the decomposing furnace by performing a denitration function, and SO ₂ Then the calcium sulfate reacts with CaO to form calcium sulfate which enters clinker, the whole process has no secondary pollution, and all substances are recycled.

In the above known prior art, although it is also disclosed to cool the denitrated flue gas by means of a heat exchanger, the role of the heat exchanger in the above prior art is completely different from the role of the low temperature condensation module 1 in the present application. The specific differences are as follows:

1. the utility model has different conception

In the prior art, the deamination is mainly carried out by spraying an absorbent through a spray tower, and the arrangement of a heat exchanger aims at reducing the load of the spray tower; the application utilizes the characteristic that the cement kiln smoke contains vapor, and the vapor in the high-temperature smoke is cooled and condensed into condensed water, ammonia and SO through the low-temperature condensation module 1 ₂ 、CO ₂ When the acidic gas is easily dissolved in the condensed water in the low-temperature environment of the low-temperature condensation module 1 (physical process), the basic ammonia molecules and the acidic SO are simultaneously dissolved in the condensed water ₂ With CO ₂ Generation of medium-acid and alkali substancesNon-volatile substances (chemical process) such as ammonium bisulfate, ammonium bicarbonate, calcium sulfate, calcium carbonate and the like are formed by neutralization reaction and discharged along with condensed water, so that the problem of ammonia escape in the cement kiln is effectively solved; the deamination reaction directly takes place in the heat exchanger, and any absorbent is not needed to be added.

2. The above-described prior art heat exchanger serves a purpose that is objectively different from the cryocondensation module 1 of the present application

1) Although the prior art records that the heat exchanger can cool the flue gas to 50 ℃, the heat exchanger does not disclose deamination in the heat exchanger, and the heat exchanger has no deamination effect in the whole prior art, because the denitration flue gas cooled by the heat exchanger enters the spray tower from the novel practical concept, the spray tower absorbs ammonia by spraying the absorbent, and for designers, the ammonia absorption cannot be divided into two steps intentionally, namely, the ammonia absorption is carried out in the heat exchanger part, and the ammonia absorption is also carried out in the subsequent spray tower, which only increases the difficulty of ammonia recovery;

2) The utility model discloses the design of following prior art sets out its heat exchanger also need not play the deamination because still need through spraying the absorbent deamination, if the heat exchanger can realize the deamination then need not to handle through the spray column again.

3) It is very important, to traditional heat exchanger, its general pursuit is that do not produce the comdenstion water as far as possible in the heat transfer process, because the comdenstion water can be to the pipeline production corruption of heat exchanger for a long time, leads to the life reduction of heat exchanger, therefore can obtain this prior art's heat exchanger also not be with producing the comdenstion water as the purpose.

3. The known prior art described above has a number of disadvantages

1) The ammonia absorbent adopted by the method is formic acid, the volatilization and escape of the absorbent also need further treatment, and the formic acid is a flammable substance;

2) The treatment capacity of the waste water after the ammonia is absorbed by the absorbent is large, and the treatment cost is high;

3) The absorbent cannot be fully utilized in the absorbent spraying mode, the absorbent has to be recycled in order to improve the utilization rate of the absorbent, a long settling period is needed, a circulating return pipeline is seriously corroded, and the scheme is difficult to implement on the ground;

4) Whether the absorbent is saturated or not is difficult to detect, and invalid absorption is easy to occur to cause ammonia escape.

The purifying equipment is different from a heat exchanger in the prior art, and because the applicable scene of the purifying equipment is limited to the purification of the flue gas containing water vapor, ammonia gas and acidic pollutants, and the purifying equipment pursuits to generate more condensed water in the cooling process to realize the purification of physical and chemical processes, the purifying equipment is completely different from the conception of the prior heat exchanger. In addition, self-sustaining formula, one-step method deamination have been realized to this application clarification plant, have deamination simple process, equipment small, advantage with low costs.

In addition, this application clarification plant not only is applicable to the deamination, because in the condensate water that low temperature condensation module 1 produced, is alkaline ammonia, cement raw meal dust and flue gas in be acidic SO ₂ 、CO ₂ And the acid-base substances such as NOx and the like are subjected to neutralization reaction, SO that the purifying equipment can also be used for removing SO ₂ And CO removal ₂ And removing NOx.

The cooling water tube bundle 102 of the cryocondensation module 1 of the present application is arranged in a fork tube bundle array. Specifically, as shown in fig. 2B, the cooling water tube bundle 102 includes a plurality of rows of cooling water tubes 102a arranged along the flue gas flowing direction, and two adjacent rows of cooling water tubes 102a are arranged in a staggered manner in the flue gas flowing direction without a space between orthogonal projection surfaces in the flue gas flowing direction.

As a preferred embodiment of the present application, the orthographic projection surfaces of the two adjacent rows of cooling water pipes 102a in the multiple rows of cooling water pipes 102a in the smoke flowing direction have an intersection. The arrangement mode ensures that the flue gas entering the flue gas purification channel goes forward in the gaps of the cooling water pipe bundle 102 in a zigzag manner, increases the heat exchange contact area of the flue gas and the cooling water pipe bundle 102 as much as possible, and can ensure that the normal circulation of the flue gas does not influence the continuous purification treatment of the newly entering flue gas.

As a modification of the arrangement of the cooling water tube bundle 102, in other embodiments, the boundaries of the orthographic projection surfaces of the adjacent two rows of cooling water tubes 102a in the flue gas flow direction among the multiple rows of cooling water tubes 102a overlap. That is, the maximum width dimension of one cooling water pipe 102a in the front row is exactly equal to the width of the gap between two adjacent cooling water pipes 102a in the rear row. This arrangement also can avoid the situation that part of the flue gas directly passes through the gaps existing in the front and rear directions of the two adjacent rows of cooling water pipes 102a without contacting with the surfaces of the cooling water pipes 102a for heat exchange.

In the present application, the cooling water pipe 102a may have a circular pipe, an elliptical pipe, a rectangular pipe, a rhombic pipe, or the like. However, considering how to realize that the resistance of the flue gas in the cooling water tube bundle 102 is as small as possible, the heat exchange contact area between the flue gas and the cooling water tube bundle 102 is as large as possible, and the heat exchange efficiency between the cooling water tube 102 and the flue gas is as high as possible, the shape of the cooling water tube 102 needs to be designed finely.

To this end, as a preferred embodiment of the present application, there is provided a round-arc rhombic cooling water tube, as shown in fig. 7A to 7C, comprising: the cross section of the cooling water pipe body 1020 is in the shape of an arc rhombus, the two ends of the short diagonal line of the cross section of the cooling water pipe body 1020 are large arc ends 1020b, and the two ends of the long diagonal line are small arc ends 1020a;

the large arc ends 1020b at the two ends of the short diagonal line and the small arc ends 1020a at the two ends of the long diagonal line are respectively connected through straight edges 1020c, and the straight edges 1020c are tangent to the arc lines of the large arc ends 1020 b.

As shown in fig. 7A-7C, the radius of curvature of the large arc end 1020b is much larger than that of the small arc end 1020a, i.e. the radius of curvature of the large arc end 1020b is much smaller than that of the small arc end 1020a, and forms an acute angle with the two straight edges 1020C due to the large curvature of the small arc end 1020 a.

The cooling water pipe 1020 has a strip structure, and the interior of the cooling water pipe is hollow and can be used for flowing cooling water. When the cooling water pipe 102a is applied to a low-temperature condensing device, the small arc ends 1020a of the cooling water pipe body 1020 are horizontally arranged along the direction from the flue gas inlet 4 to the flue gas outlet 5, i.e. horizontally arranged along the left-right direction of the low-temperature condensing device, and the midpoint connecting line of the two large arc ends 1020b is perpendicular to the connecting line of the two small arc ends 1020a, i.e. the two large arc ends 1020b are horizontally arranged along the front-back direction of the low-temperature condensing device.

The cooling water pipe body 1020 with the cross section being circular arc rhombus shape in the embodiment of the application is defined as a circular arc rhombus pipe, and the cross section of the cooling water pipe is circular, oval, rhombus and the like, so that the larger heat exchange contact area and smaller smoke resistance of the smoke and the cooling water pipe can be realized. The specific analysis is as follows:

comparison with round tubes:

the length of the short diagonal line of the arc rhombic pipe is the same as the diameter of the original circular cooling water pipe, and the length of the long diagonal line is larger than the diameter of the original circular cooling water pipe, so that the surface area of the improved arc rhombic pipe at the two ends is larger than that of the original circular cooling water pipe, the contact area of the cooling water pipe and the cement kiln smoke is increased, and the heat exchange area is increased.

In addition, because the curvature radius of the small arc end 1020a of the cooling water pipe body 1020 is much smaller than that of the large arc end, that is, the two ends of the cooling water pipe body 1020 are acute angles with smaller included angles, and compared with the shapes of the two ends of the circular cooling water pipe, the wind resistance of the cooling water pipe body 1020 with the shape of the circular rhombus at the two ends is smaller, so that the resistance reduction is realized by the circular rhombus compared with the circular shape.

Comparison with an oval tube:

the circular-arc rhombic tube has two differences compared with the elliptical tube, the first difference is that the large circular-arc end 1020b and the small circular-arc end 1020a of the cooling water tube body 1020 of the present application are connected by the straight edge 1020c, and the elliptical tube is connected by the arc edge. When the two cooling water pipes 102a are arranged in a staggered manner, the flow space formed between the two oval pipes is a structure with two large ends and a small middle, and the flow space formed between the two arc-shaped pipes is more flat in size, so that the flow of the tail gas is facilitated, and the influence on the flow of the tail gas caused by the size change of the flow space can be avoided.

The second difference is that in order to form the arc diamond structure, in the present application, under the condition that the sizes of the large arc ends 1020b with large curvature radius are uniform, the curvature radius of the other small arc end 1020a is inevitably larger than that of the arc diamond, so that compared with the arc diamond, the wind resistance at the two ends of the arc diamond is smaller, and the technical effect of reducing the resistance can be achieved.

Compared with the conventional rhombic tube:

compared with a diamond-shaped pipe, the cross section of the arc diamond-shaped pipe is equivalent to that the upper and lower sharp corner ends of the cross section of the diamond-shaped pipe are replaced by large arc ends 1020b with small curvature, and the left and right sharp corners are replaced by small arc ends with large curvature on the basis of the cross section of the diamond-shaped pipe. The upper and lower both ends of circular arc diamond pipe are great circular arc end 1020b for the upper and lower both ends of diamond pipe are obtuse angle end, adopt the circular arc transition can make the flow of flue gas more stable, will control two closed angles in addition and replace for the little circular arc end of high camber can avoid taking off the flow at the rear end at the flue gas.

In addition, the diamond-shaped pipe with the sharp corners at the left end and the right end can cause the left end and the right end to deform too much and break easily, and is limited by the structure, the thickness at the two ends of the diamond-shaped pipe can be larger than the thickness of other parts generally, so that the heat conduction paths of cooling water in the diamond-shaped pipe at the two ends are increased, and the heat exchange efficiency is reduced. The small arc structure can enable the thickness of the two ends of the arc rhombic tube to be close to that of other parts, so that the heat conduction paths of cooling water at the two ends cannot be increased, and further the heat exchange efficiency cannot be influenced.

This embodiment has reached the heat transfer area who increases condenser tube body 1020 both ends, and utilize orthodrome end 1020b and little circular arc end 1020a to reduce the resistance that receives when cement kiln tail gas flows, make the purpose that cement kiln tail gas steadily flows, thereby realized promoting the area of contact of cement kiln tail gas and condenser tube body 1020, and make cement kiln tail gas can steadily flow, promote the technological effect of the cooling efficiency of cement kiln tail gas, and then it has heat transfer area less to have solved condenser tube among the correlation technique, and it is great to the resistance that cement kiln tail gas flows, the problem of the cooling efficiency of promotion cement kiln tail gas that can not be fine.

The connecting line of the midpoints of the large arc ends 1020b at the two ends of the short diagonal is perpendicular to the connecting line of the small arc ends 1020a at the two ends of the long diagonal.

The large and small

rounded ends

1020b, 1020a each include a fillet and a bullnose. In order to avoid the problem that the thickness of the cooling water pipe 1020 varies due to the round corners at the upper and lower ends and the left and right ends, the inner and outer corners of the large arc end 1020b are concentrically disposed, and the inner and outer corners of the small arc end 1020a are concentrically disposed in this embodiment.

Because the size design of the cross section of the cooling water pipe body 1020 still has a great influence on the heat exchange efficiency, in order to reasonably utilize the space and improve the heat exchange efficiency, the application ranges of the sizes of the cross section of the cooling water pipe body 1020 in the embodiment are as follows:

A＝20～100mm；

B＝A～2A；

R ₁ ＝1/2×A；

R ₂ ＝R ₁ -t；

r ₁ ＝6～1/2×R ₁ ；

r ₂ ＝r ₁ -t；

wherein, a is the short diagonal length of the cooling water pipe body 1020; b is the length of the long diagonal of the cooling water tube body 1020; r ₁ The outer diameter of the large arc end 1020 b; r is ₂ The inner diameter dimension of the small arc end 1020a; t is the wall thickness of the cooling water pipe body 1020; r is a radical of hydrogen ₁ The outer diameter dimension of the small arc end 1020a; r is ₂ The inner diameter dimension of the large arc end 1020 b.

Because condenser tube 102a in this application is the circular arc diamond-shaped pipe, for circular pipe, the degree of difficulty is higher in the installation, is difficult to guarantee the leakproofness of its junction to also be convenient for with the connection of intaking and return water pipeline. Therefore, the cooling water pipe 102a provided in this embodiment further includes an upper joint 22 and a lower joint 21 respectively provided at both ends of the cooling water pipe body 1020; the upper joint 22 and the lower joint 21 have the same structure and both comprise a plug 211 and a joint 213, the plug 211 is fixed at two ends of the cooling water pipe body 1020 in a sealing manner, a first end of the joint 213 is fixed on the plug 211 in a sealing manner and is communicated with the inside of the cooling water pipe body 1020, and a second end of the joint extends out of the plug 211.

Specifically, it should be noted that, the plugs 211 are used to plug the two ends of the cooling water pipe body 1020, the cross section of the plugs 211 may be equal to or larger than the cross section of the cooling water pipe body 1020, and the plugs 211 are used to seal the two ends of the cooling water pipe body 1020. The fitting 213 may be provided at a position of the stopper 211 so that the fitting 213 may be fitted to the stopper 211 and then connected to the water inlet and return pipes by the fitting 213. The joint 213 may be provided with a structure for facilitating connection, such as a circular shape. Through end cap 211 and the setting that connects 213, realized improving the leakproofness of condenser tube body 1020, also be convenient for simultaneously carry out the technological effect of being connected with intaking and return water pipeline, and then be difficult to guarantee the leakproofness of its junction when having solved among the correlation technique non-circular condenser tube installation to also be convenient for with the connection of intaking and return water pipeline, lead to installing comparatively troublesome problem.

Further, the cross section of the plug 211 is provided with an arc rhombus shape which is the same as the cross section of the cooling water pipe body 1020, a connector mounting hole is formed in the plug 211 along the axial direction of the plug, and the connector mounting hole is communicated with the inside of the cooling water pipe; a first end of the fitting 213 is sealingly secured within the fitting mounting hole.

To improve the sealing between the joint 213 and the joint mounting hole, the first end of the joint 213 is screwed into the joint mounting hole, and a screw glue may be injected to improve the sealing. To facilitate connection of the connector 213 to external equipment, the end of the connector 213 remote from the plug 211 is further provided with internal or external threads.

An annular groove is arranged in the joint mounting hole, a sealing ring 212 is embedded in the annular groove, and the joint 213 is in threaded connection with the joint mounting hole and tightly supports the sealing ring 212 in the annular groove, so that the sealing performance of the joint 213 and the joint mounting hole can be improved.

In this application, as shown in fig. 8, two adjacent rows of the three adjacent cooling water pipe bodies 1020 are separated from each other, the cooling water pipe body 1020 forms a cooling water pipe unit arranged in a triangle, and the arrangement size range of the cooling water pipe unit is as follows:

C＝1.8A～2A；

D＝0.8B～1.5B；

wherein A is the maximum width dimension of the tube cross section; b is the maximum length size of the pipe section; c is the center distance size of the tube sections of two adjacent cooling water tube bodies 1020 in the same row; d is the center-to-center distance of the tube sections of the adjacent rows of cooling water tube bodies 1020.

When the cooling water pipe 102a is an arc diamond pipe, A is the maximum width of the short diagonal line of the arc diamond pipe; b is the maximum length of the long diagonal line of the arc rhombic tube; c is the center distance between two adjacent arc rhombic pipes in the same row; d is the horizontal center distance of two adjacent rows of arc rhombic pipes.

FIG. 13 shows a simplified diagram of the convective heat transfer of the cryocondensation module of the present application, where s ₁ For the fork-row tubes to bundle the line spacing, s ₂ Is the pitch of the rows of the fork-row tubes.

The heat exchange of the flue gas side of the low-temperature condensation module is a fluid transverse grazing cross row tube bundle, and the relation between the average heat transfer coefficient h of the surface and the dimensionless heat transfer coefficient Nu is as follows:

where l is the characteristic length and λ is the thermal conductivity of the fluid.

For the studied flue gas heat exchange working condition, the flowing Reynolds number range is about Re =10 ³ ～2×10 ⁵ Nu can be expressed as:

wherein s is ₁ For the fork-row tubes to bundle the line spacing, s ₂ Is the pitch of the rows of the fork-row tubes. Re _f Reynolds number, pr, for flue gas flow _f Is the prandtl number, pr, of the flue gas _w Is the prandtl number of the flue gas with the wall temperature as the characteristic temperature.

In engineering calculation, if the logarithmic mean temperature difference of convective heat transfer is given as delta t by design _m Then, according to the heat transfer equation, the overall heat exchange quantity Φ is:

Φ＝kAΔt _m

wherein k is the comprehensive heat exchange coefficient, and A is the heat exchange area.

From the above analysis, it can be known that the heat exchange area of the circular arc diamond-shaped pipe is larger than that of the circular pipe, so that the whole heat exchange amount of the equipment can be increased by adopting the circular arc diamond-shaped pipe as the cooling water pipe 102a.

The adoption of the arc rhombic tube also has influence on the flow resistance of the flue gas. Hereinafter, a round pipe and a preferred round rhomboid pipe of the present application are subjected to comparative analysis.

The flow resistance relation of the circular tube fork row is as follows:

when gas flows around the tube bundle, the flow resistance is a function of the fluid velocity, the arrangement of the tube bundle, the physical properties of the fluid and the number of rows, which are related by

Wherein chi is the correction coefficient of the fork row tube bundle and is the pipeline parameter s ₁ 、s ₂ Relation of (A), N _L F is the drag coefficient for the number of line rows, and f is a value that varies depending on the Reynolds number of flow Re.

The relation of the flow resistance of the arc rhombic tube fork row is as follows:

the long side of the arc rhombus tube is l ₁ Short side is l ₂ And designing a correction coefficient epsilon, wherein the flow resistance relation of the arc rhombic tube fork row is as follows:

wherein, ε (l) ₁ ,l ₂ ) Is a correction coefficient, epsilon (l), related to the side length of the arc rhombus-shaped tube compared with the tube bundle of the circular tube fork row ₁ ,l ₂ ) Greater than 1. The other parameters have the same meaning as the above formula.

The edges of the arc rhombus are similar to the streamline property of an airfoil, and compared with a circular tube, the flow boundary layer separation area at the tail part of the circular tube is reduced, the adverse pressure gradient is reduced, and therefore the integral resistance can be reduced.

As shown in fig. 3A-3B, the box structure of the purifying apparatus of the present application preferably adopts a rectangular box structure, specifically: the box body 101 comprises an upper box plate 1011, a lower box plate 1012, a front box plate 1013 and a rear box plate 1014, wherein the upper box plate 1011, the front box plate 1013, the lower box plate 1012 and the rear box plate 1014 are sequentially connected in a sealing manner; the left side and the right side of the box body 101 are provided with openings to form a flue gas inlet 4 and a flue gas outlet 5 for flue gas circulation, and a flue gas channel from the flue gas inlet 4 to the flue gas outlet 5; the flue gas channel is used for accommodating the vertically arranged cooling water tube bundles 102 which are arranged in an array; a plurality of water pipe mounting holes 102b for hermetically assembling the end parts of the cooling water pipes 102a are formed in the upper box plate 1011 and the lower box plate 1012; a space for fitting an end fitting assembly communicating upper and lower ends of the chilled water tube bundle 102 is provided above the upper tank plate 1011 and below the lower tank plate 1012. However, the present application does not limit the box structure to be a rectangular structure, and it should be understood by those skilled in the art that in some special application scenarios, the box structure may be appropriately deformed, for example, an arc-shaped box structure with a certain radian, for example, a trapezoid box structure with different sizes of the flue gas inlet and the flue gas outlet, and the like.

In this application, the upper and lower end portions of the cooling water tube bundle 102 are attached to the upper and

lower headers

1011 and 1012. Considering that the purification equipment needs to operate for a long time, the low-temperature condensation module 1 is frequently vibrated when being impacted by smoke gas and the cooling water pipe 102a is in operation, so that the smoke gas leakage is easily caused at the joint of the upper end part and the lower end part of the cooling water pipe 102a and the upper box plate and the lower box plate. In order to solve this problem, as shown in fig. 9A to 10B, the present application proposes a sealing installation structure of a cooling water pipe and a box plate, which includes an installation base 20 and a cooling water pipe body 1020; wherein the content of the first and second substances,

the mounting base 20 is provided with a water pipe mounting hole 102b, and the wall of the water pipe mounting hole 102b is provided with an annular groove 17 along the circumferential direction; in the present embodiment, the mounting bases 20 are an upper box plate 1011 and a lower box plate 1012 of the box body 101.

The end of the cooling water pipe body 1020 is arranged in the water pipe mounting hole 102b, the part of the cooling water pipe body 1020 corresponding to the annular groove 17 is provided with an annular protrusion 18, and the annular protrusion 18 is embedded in the annular groove 17 in a sealing manner so that the end of the cooling water pipe body 1020 and the water pipe mounting hole 102b form a curved surface seal.

In this embodiment, the cooling water pipe body 1020 is a strip-shaped structure, and the interior of the cooling water pipe body is hollow, so that the cooling water can flow. The mounting base 20 is an upper case plate 1011 or a lower case plate 1012 of the present application. In the prior art, in order to improve the sealing performance between the cooling water pipe body 1020 and the installation base 20, a sealing ring is generally fixed on the installation base 20, the cooling water pipe body 1020 is fixed in the sealing ring, and the sealing performance at the joint of the cooling water pipe body 1020 and the installation base 20 is improved by the sealing ring.

However, since the outer side of the cooling water pipe body 1020 still has a straight curved surface structure and the position corresponding to the seal ring and the mounting base 20 also has a straight curved surface structure, when the cooling water pipe body 1020 is mounted on the seal ring and the mounting base 20, the straight curved surface structure still has difficulty in maintaining the sealing performance for a long time, and the sealing effect is still not ideal.

Therefore, to solve this problem, the present embodiment is configured by forming a water pipe mounting hole 102B in the mounting base 20 and forming an annular groove 17 in the water pipe mounting hole 102B, as shown in fig. 9B and 10B. The end of the cooling water pipe body 1020 is sleeved in the water pipe mounting hole 102b, and in order to make the cooling water pipe body 1020 and the annular groove 17 fit, an annular protrusion 18 can be arranged outside the cooling water pipe body 1020, and the annular protrusion 18 is embedded in the annular groove 17 in a sealing manner, so that a curved surface seal is formed between the annular protrusion 18 and the annular groove 17.

Due to the arrangement of the annular groove 17, the inner surface of the water pipe mounting hole 102b on the mounting base 20 is changed from a straight curved surface structure to a zigzag curved surface structure, and the outer surface of the end part of the cooling water pipe body 1020 is changed from a straight curved surface structure to a zigzag curved surface structure. It can be understood that, when the cooling water pipe body 1020 is installed in the water pipe installation hole 102b, the connection portion of the cooling water pipe body 1020 and the water pipe installation hole 102b is also changed from a straight curved surface structure to a zigzag curved surface structure, thereby improving the sealing performance of the connection portion of the cooling water pipe body 1020 and the water pipe installation hole 102 b. And the sealing performance can be further improved by adopting an interference fit mode between the annular bulge 18 and the annular groove 17.

According to the embodiment, the sealing performance between the cooling water pipe body 1020 and the installation foundation 20 is improved, the technical effect that tail gas leaks from the joint of the cooling water pipe body and the installation foundation 20 is avoided, and the problem that in the related art, the sealing performance is still difficult to meet the use requirement because the cooling water pipe and the installation foundation 20 are generally sealed only by the sealant 16 or the sealing ring is solved.

As shown in fig. 9B and 10B, the annular groove 17 in the water pipe installation hole 102B may be grooved by a special tool, and the width of the cross section of the annular groove 17 may gradually decrease from inside to outside, so as to form a small circular arc end structure with a smaller diameter at the outermost end thereof. The configuration of the annular recess 17 provides better sealing when the annular protrusion 18 is mated therewith, relative to a rectangular or other shaped groove configuration. And the mode of the annular bulge 18 accessible expand tube on the cooling water pipe body 1020 realizes, and is concrete, can with the cooling water pipe body 1020 suit in the water pipe mounting hole that has seted up annular groove 17, through dedicated expand tube frock, to the part that cooling water pipe body 1020 and annular groove 17 correspond exert the pressure that expands outward for the cooling water pipe body 1020 produces deformation at corresponding part, forms first annular bulge 18 and the extrusion is fixed in annular groove 17.

In order to further improve the sealing performance of the joint of the cooling water pipe body 1020 and the installation foundation 20, the sealing glue 16 is arranged in the annular groove 17, the sealing glue 16 can be coated in the annular groove 17 before the cooling water pipe body 1020 is installed, and after the cooling water pipe body 1020 expands to form the annular bulge 18 which is embedded in the annular groove 17, the sealing performance is improved under the action of the sealing glue 16.

In order to improve the uniformity of the opening depth of the annular groove 17, the annular groove 17 and the water pipe mounting hole are arranged coaxially.

As shown in fig. 9B and 10B, a rubber packing 15 is further provided in the annular groove 17, and the annular protrusion 18 abuts the rubber packing 15 in the annular groove 17. The rubber sealing gasket 15 is formed to match the shape of the annular groove 17, the rubber sealing gasket 15 can be embedded in the annular groove 17, then the sealant 16 is injected into the annular groove 17, and finally the cooling water pipe body 1020 is sleeved in the water pipe mounting hole 102 b.

The annular groove 17 includes a plurality of grooves arranged at intervals along the circumferential direction of the hole wall of the water pipe installation hole 102b, and the plurality of grooves have the same or different extending depths on the hole wall. The contact point of the cooling water pipe body 1020 and the inner wall of the water pipe installation hole 102b may be increased by the plurality of grooves. When the extension depth of a plurality of recesses is inconsistent, can make the leakproofness between the different contact points different, can carry out the adjustment of recess depth according to the actual tail gas flow condition to improve application range.

In order to further improve the sealing performance of the joint between the cooling water pipe body 1020 and the mounting base 20, a plurality of annular grooves 17 are arranged and distributed along the axial direction of the water pipe mounting hole 102b, so that a multi-stage sealing is formed, and the sealing mode of each stage is the same.

To further improve the sealing property, as shown in fig. 10B, the annular grooves 17 in the present embodiment are provided in two, including a first annular groove 171 and a second annular groove 172, and the groove opening direction of the first annular groove 171 and the groove opening direction of the second annular groove 172 are inclined in opposite directions in the axial direction of the water pipe mounting hole; accordingly, the annular projection 18 includes a first annular projection 18 and a second annular projection 18, and the projections of the first annular projection 18 and the second annular projection 18 are directed to be inclined in opposite directions in the axial direction of the water pipe installation hole.

Specifically, it should be noted that the first annular groove 171 and the second annular groove 172 are sequentially arranged from inside to outside, the groove opening direction of the first annular groove 171 may be inclined toward the inside of the mounting base 20, and the groove opening direction of the second annular groove 172 may be inclined toward the outside of the mounting base 20, so that the connection between the cooling water pipe body 1020 and the water pipe mounting hole 102b is sealed in different directions.

Also, in the present embodiment, the depth of the second annular groove 172 is greater than the depth of the first annular groove 171. Through this mode of setting for second annular groove 172 forms the better second grade of leakproofness, further improves the leakproofness of whole junction.

After the annular groove 17 is matched with the annular groove 17 positioned in the water pipe mounting hole 102b, the sealing performance of the part in the water pipe mounting hole 102b is effectively improved, but the sealing performance of the part at the two ends of the water pipe mounting hole 102b still has a straight curved surface structure, and the sealing performance still needs to be improved. Therefore, as shown in fig. 10B, in this embodiment, two annular clamping protrusions 19 are further disposed on the cooling water pipe body 1020, the two annular clamping protrusions 19 are located on the inner side and the outer side of the mounting base 20, that is, located at two ends of the water pipe mounting hole 102B, and opposite surfaces of the two annular clamping protrusions 19 respectively abut against the inner side surface and the outer side surface of the mounting base 20. The first seal and the last seal at the joint of the cooling water pipe body 1020 and the installation foundation 20 are formed by the two annular clamping protrusions 19 respectively, so that the sealing performance can be further enhanced, and meanwhile, the connection strength of the cooling water pipe body 1020 and the installation foundation 20 can also be improved.

As a preferred embodiment of the present application, the water pipe installation hole 102b is an arc diamond-shaped hole having a cross-sectional profile and a size consistent with those of the end of the arc diamond-shaped pipe, the annular groove 17 includes a plurality of grooves sequentially disposed on the four straight sides 1020c and the two large arc ends 1020b of the arc diamond-shaped hole, correspondingly, the annular protrusion 18 includes a plurality of protrusions disposed on the four straight sides 1020c and the two large arc ends 1020b of the end of the arc diamond-shaped pipe, the plurality of grooves and the plurality of protrusions are engaged and sealed, and the engagement depth of the different grooves and the different protrusions is combined, and then the special-shaped shape of the arc diamond is engaged, so that the sealing performance of the connection between the cooling water pipe 102a and the installation base 20 (the upper box plate 1011 and the lower box plate 1012) can meet the requirement of long-time operation of the purification apparatus without smoke leakage.

In the present application, the structural form of the end fitting assembly affects the flow form of the cooling water from the cooling water inlet port 103a to the cooling water return port 104a. The present application presents five embodiments of a cryocondensation module 1 with different end fitting assemblies.

Fig. 2C-2E illustrate embodiments of a cryocondensation module with round tube bends as end fittings. As can be seen from the figure, the end joint assembly is a round pipe elbow assembly which sequentially communicates the ends of two adjacent cooling water pipes 102a. Along the direction from the flue gas inlet 4 to the flue gas outlet 5, the end parts of the cooling water pipes 102 in two adjacent rows are connected through a circular pipe elbow 105 positioned on the outer side of the box plate.

In this embodiment, the cooling water circulation pipeline is disposed above the box 101 of the cryocondensation module 1, and in other embodiments, the cooling water circulation pipeline may be disposed below the cryocondensation module, and the specific position is set according to actual needs. The cooling water circulation pipelines are arranged into two groups, the cooling water pipe bundles 102 are divided into a front cooling water pipe area 24 and a rear cooling water pipe area 24 in the box 101 along the direction from the flue gas inlet 4 to the outlet, and a cooling water inlet pipeline 103 and a cooling water return pipeline 104 of the two groups of cooling water circulation pipelines are respectively communicated with a water inlet cooling water pipeline and a water outlet cooling water pipeline of the front cooling water pipe area 24 and the rear cooling water pipe area 24. Because the flue gas temperature near the flue gas air inlet 4 is high, the cooling temperature of the cooling water pipe 102a near the flue gas air inlet 4 needs to be greatly reduced, and the flue gas temperature near the flue gas air outlet 5 needs to be reduced to a small extent on the basis of reducing the temperature of the cooling water pipe 102a at the front side, so that in the embodiment, the cooling water flow in the cooling water pipe area 24 near the outlet side can be reduced, and the cooling water consumption can be saved. Specifically, the cooling water flow rate near the outlet-side cooling water tube section 24 may be reduced by reducing the tube diameter (i.e., the size of the cross-sectional area) of the cooling water tube 102a or by reducing the feed water flow rate of the cooling water feed line 103. In other embodiments, the cooling water flow in the outlet-side cooling water tube section 24 may not be reduced, i.e. the cooling water usage in the inlet-side cooling water tube section 24 corresponds to the outlet-side cooling water tube section 24 flow. In addition, it should be noted that the number of the cooling water tube zones 24 is not limited in this application, and in other embodiments, three, four, five, etc. may be provided according to actual needs.

In the above embodiment, since the number of the cooling water pipes 102 is large, the same number of the circular pipe elbows 105 need to be adopted, and the large number of the circular pipe elbows 105 may cause kinetic energy resistance loss of the cooling water at the turning position, thereby reducing the heat exchange efficiency of the low-temperature condensation module 1. Meanwhile, in order to reduce the overall volume of the low-temperature condensation module 1, the arrangement distance of the cooling water pipes 102 is small, the circular pipe elbow 105 is connected with the end parts of the two cooling water pipes 102, the radian of the circular pipe elbow 105 is small, and the processing difficulty is large.

To address the problems of greater kinetic energy loss of the cooling water at round tube bend 105 and greater difficulty in machining round tube bend 105, figures 3A-6D illustrate an embodiment that utilizes a water box instead of round tube bend 105 as the end fitting assembly.

Specifically, the end joint assemblies include upper end joint assemblies 25 and lower end joint assemblies 26, the upper end joint assemblies 25 and the lower end joint assemblies 25 are alternately arranged above and below the cooling water tube bundle 102 in sequence along the flue gas circulation direction, and each end joint penetrates through the ends of the cooling water tubes 102a in multiple rows to form a parallel pipeline for the co-flow of at least two rows of parallel water flows in the cooling water tube bundle 102. Specifically, the upper end module 25 is an upper water tank 11, the lower end module 26 is a lower water tank 12, the upper water tank 11 includes a plurality of upper water tank subsections 111 as the end joints, which are arranged above the cooling water pipe bundle 102 in the flue gas flowing direction, the lower water tank 12 includes a plurality of lower water tank subsections 121 as the end joints, which are arranged below the cooling water pipe bundle 102 in the flue gas flowing direction, the plurality of rows of cooling water pipes 102a through which each water tank subsection passes include water inlet pipes and water outlet pipes, which are arranged side by side in the flue gas flowing direction, and the rows of the water inlet pipes and the water outlet pipes are the same.

Fig. 3A-3D show embodiments in which cooling water is circulated along the water grouping pipes. In this embodiment, a water tank is provided on the outer sides of the upper and lower tank plates of the tank 101 instead of the round pipe bend 105 in embodiment 1 to communicate the end portions of the cooling water pipe 102. An upper water tank 11 is arranged above an upper tank plate 1011, a lower water tank 12 is arranged below a lower tank plate 1012, a plurality of partition plates are arranged in the upper water tank 11 to divide the upper water tank 11 into 1 st to Nth upper water tank subsections 111, a plurality of partition plates are arranged in the lower water tank 12 to divide the lower water tank 12 into 1 st to Nth lower water tank subsections 121, and each upper water tank subsection 111 or each lower water tank subsection 121 is correspondingly communicated with the end parts of at least two rows of cooling water pipes 102. The cooling water inlet pipeline 103 is communicated with a 1 st lower water tank subsection 121 close to the smoke air inlet 4, the cooling water return pipeline 104 is communicated with an Nth upper water tank subsection 111 farthest away from the smoke air inlet 4, and the 2 nd to the N th lower water tank subsections 121 of the lower water tank 121 are respectively arranged with the 1 st to the N-1 st upper water tank subsections 111 of the upper water tank 111 in a staggered mode. Specifically, as shown in fig. 3A, the cooling water enters the 1 st lower tank part 121 of the lower tank from the cooling water inlet, the 1 st lower tank part 121 corresponds to the 4 rows of cooling water pipes 102a, the cooling water flows upward along the 4 rows of cooling water pipes 102a and flows out from the front 4 rows of cooling water pipes 102a of the 1 st upper tank part 111 under the pressure driving of the water pump 9, as seen from the figure, the 1 st upper tank part 111 corresponds to the 8 rows of cooling water pipes 102a, the cooling water flowing in from the front 4 rows flows downward into the rear 4 rows of cooling water pipes 102a after passing through the 1 st upper tank part 111, the 2 nd lower tank part 121 corresponds to the 8 rows of cooling water pipes 102a, the cooling water flowing down through the 4 rows of cooling water pipes 102a of the 1 st upper tank part 111 turns around the 2 nd lower tank part and flows upward from the rear 4 rows of cooling water pipes 102a, the 2 nd to N-1 st upper tank part 111 and the cooling water flowing out from the upper tank part 121, the 3 rd to N-th lower tank parts 121 are sequentially arranged according to the above-mentioned rules, and the cooling water circulation flow-up-th lower tank parts 121, and the last upper tank parts 11.

In the embodiment, the water tank is used for replacing the round pipe elbows in the embodiment, so that the cooling water route is changed from 1-way steering in the embodiment to multi-way steering, the steering times are reduced, the resistance loss of the cooling water turning is reduced, and the heat exchange efficiency of the cooling water pipe bundle is improved; secondly, the water tank has also reduced the processing degree of difficulty and processing cost than pipe elbow.

As for the water flow resistance, the water flow resistance is caused by the flowing in the pipe, and the flow resistance consists of the on-way resistance of the straight pipe section and the local resistance of the straight pipe section, such as the flowing through an elbow, a joint, sudden change and the like.

The on-way resistance is expressed as:

wherein lambda is the on-way drag coefficient, l is the length of the pipe, d is the inner diameter of the pipe, V _i The flow velocity in the tube is shown, and g is the gravity acceleration;

the local resistance is expressed as:

where ξ is the local drag coefficient and N is the number of local drag components.

From the above two formulas, the longer the tube length l, the longer h _f The larger, the larger N, h _ξ The larger. When the elbow form is changed into the integral water tank, the distance from one side to the other side of the water flow is greatly reduced, and the flow resistance is only composed of a small section of on-way resistance and 2 local resistances. Because the tube bundle array is changed from a series arrangement to a parallel arrangement, the flow resistance of each channel is the same and greatly reduced.

In the present application, the water tank sections may be provided independently, that is, the water tank sections are formed independently, and the water tank sections may be fixed by fixing structures. The shape of the water box portion is not limited to the rectangular shape in the embodiment of the present application, and in other embodiments, the outer right angle of the rectangular water box portion may be rounded in order to further reduce the resistance loss of the cooling water turning.

Considering that the flue gas temperature near the flue gas inlet 4 is high, the cooling water consumption is large, the flue gas temperature far away from the flue gas inlet 4 is low, and the cooling water consumption is small, in order to further reduce the cooling water consumption, as a preferred embodiment of the low-temperature condensation module 1 of the present application, fig. 4A-4C show an embodiment in which cooling water circulates along the grouping water pipes in each straight-through type zone and the cooling water consumption is adjustable, on the basis of the above-mentioned embodiment in which cooling water circulates along the grouping water pipes, the cooling water pipes 102 are divided into 1 st to nth zones, the cooling water pipes 102 of each zone are correspondingly provided with a group of cooling water inlet 103a and cooling water return 104A, and a plurality of cooling water pipe zones are isolated from each other and independently perform cooling water circulation. This application reaches the purpose of practicing thrift 1 whole water consumption of low temperature condensation module through the inflow that reduces the cooling water pipe district of keeping away from 4 sides of flue gas air intake. Specifically, in the present embodiment, the cooling water pipe 102 is divided into three zones, and the cooling water usage amounts set to the 1 st zone to the 3 rd zone are sequentially reduced. This application does not do the restriction to the quantity of condenser tube 102 subregion, in other embodiments, according to actual need, can set up condenser tube 102 into two districts, four districts, five districts etc. correspondingly, condenser water inlet 103a and condenser water return mouth 104a also set up into two sets of, four sets of, five sets of etc..

Further, in this application embodiment, the mode that reduces the cooling water quantity of keeping away from 4 sides of flue gas air intake in proper order is: by providing a flow regulating valve 1031 at the cooling water inlet 103a of the 1 st lower header section 121 of each cooling water line section, the adjustment of the cooling water usage of each cooling water line section can be achieved by adjusting the inlet area of the flow valve 1031. Specifically, a divided water pipe 1033 communicating with the 1 st lower header section 121 of each cooling water pipe section is provided to the lower header section 121, and a flow rate adjusting valve 1031 is provided to the divided water pipe 1033.

Still further, a cooling water inlet main pipe 1032 is arranged below the lower water tank 12 of each cooling water pipe region and is respectively communicated with each water distribution pipe 1033, cooling water enters from the cooling water inlet main pipe 1032, and the cooling water is distributed to each water distribution pipe 1033 by the cooling water inlet main pipe 1032 according to the opening size of each flow regulating valve 1031.

As an alternative embodiment of the low temperature condensation module 1, the upper end assembly is an upper water tank penetrating the upper ends of all cooling water pipes, the lower end assembly is a lower water tank, the lower water tank includes a plurality of lower water tank subsections arranged in an array along the smoke circulation direction, and each lower water tank subsection penetrates a plurality of rows of the cooling water pipes; the upper water tank is communicated with a cooling water return port, and each lower water tank is communicated with a cooling water inlet. The cooling water inlet main pipe is communicated with each cooling water inlet through a flow regulating valve. Specifically, as shown in fig. 5A to 5C, in the straight-through adjustable cooling water embodiment for each zone, a plurality of partition plates are disposed in the lower water tank 12 to divide the lower water tank 12 into a plurality of lower water tank sections 121, and the number of the cooling water pipes 102a correspondingly connected to each group of lower water tank sections 121 may be the same or different, and is specifically set according to actual needs. The upper water tank 11 is provided with no partition plate and is a water return tank which covers and is communicated with the 1 st to Nth rows of cooling water pipes 102.

The cooling water enters from the cooling water inlet manifold 1032 and is distributed to the corresponding lower tank sub-portions 121 through the flow regulating valves 1031 of the respective water distribution pipes 1033, and in this embodiment, each of the lower tank sub-portions 121 is an inlet tank, and the cooling water flows into the upper tank 11 from the respective sub-portions from bottom to top along the cooling water pipes 102a, and finally flows out from the cooling water return port 104a provided at the nth row cooling water pipe 102a.

Further, considering that the flue gas temperature near the flue gas air inlet 4 is high, the cooling water usage is large, the flue gas temperature far away from the flue gas air inlet 4 is low, and the cooling water usage is small, in order to further reduce the cooling water usage of the low-temperature condensation module 1 in the embodiment of the present application, the cooling water volume of the sub-portion far away from the flue gas air inlet 4 side is set to be smaller than the cooling water volume of the sub-portion near the flue gas air inlet 4 side, specifically, along the flue gas air inlet 4 to the outlet direction, the openings of the flow regulating valves 1031 of the water dividing pipes 1033 of the sub-portions are sequentially reduced.

As an alternative embodiment of the low temperature condensation module 1 of the present application, the upper end assembly 25 is an upper water tank 11 penetrating the upper end of all the cooling water pipes 102a, the lower end assembly 26 is a lower water tank 12 penetrating the lower end of all the cooling water pipes 102a, and one of the upper water tank 11 and the lower water tank 12 is communicated with the cooling water inlet 103a, and the other is communicated with the cooling water return 104a. In the embodiment of fig. 6A to 6D, in which the cooling water in each straight-through region circulates along the grouped water pipes and the amount of the cooling water is adjustable, there is no partition board in the upper water tank 11, and the upper water tank 11 is a water return tank communicated with the cooling water return port 104 a; the lower water tank 12 is provided with no partition plate therein, and the lower water tank 12 is a water inlet tank communicated with the cooling water inlet 103 a. The upper water tank 11 and the lower water tank 12 are both covered and communicated with the 1 st to the N-th rows of cooling water pipes 102a. The cooling water enters the lower water tank 12 from the cooling water inlet 103a, then flows from the rows of cooling water from bottom to top to the upper water tank 11, and finally flows out from the cooling water return port 104a provided at the nth row cooling water pipe 102a.

Further, consider that the flue gas temperature that is close to flue gas air intake 4 department is high, the cooling water quantity is big, the flue gas temperature of keeping away from flue gas air intake 4 department is low, the cooling water quantity is little, in order to further reduce the cooling water quantity of low temperature condensation module 1, in this application embodiment, along flue gas air intake 4 to export direction, the opening size that lower water tank 12 and each row of condenser tube 102a communicate reduces in proper order, so that the cooling water quantity of each row of condenser tube 102a of flue gas air intake 4 to export direction reduces in proper order, thereby realize low temperature condensation module 1's whole water consumption.

In addition, as shown in fig. 3C, 4C, 5C, and 6C, the cooling water inlet 103a and the cooling water return 104a are disposed in opposite sides, so that the traveling distance of the cooling water in each of the parallel-connected water distribution pipes 1033 is the same as the resistance, thereby ensuring that the flow rate of the water in each of the parallel-connected water distribution pipes 1033 is the same and the cooling efficiency thereof for the corresponding flue gas is the same.

In addition, in order to ensure the overall appearance attractiveness of the purifying equipment, a closed grille cover is additionally arranged on the outer side of the lower tank plate 1012 and is used for shielding the water tank or the elbow 105 exposed at the bottom of the tank body 101.

The embodiment of the application also provides a low-temperature condensation module 1 with a demisting water-collecting water baffle structure.

Cement kiln smoke discharging's flue gas wind speed is high, and the time of carrying out the heat transfer condensation through low temperature condensation module 1 is shorter, if the comdenstion water that contains ammonia in the flue gas does not flow to the device bottom completely along condenser tube 102a and arranges outward, then the comdenstion water that contains ammonia can be followed flue gas air outlet 5 and discharged the external world and cause the pollution. Therefore, the present embodiment further collects the moisture in the flue gas cooled to the dew point by providing the demisting water-collecting baffle 13 at the flue gas outlet.

In order to further guarantee that the comdenstion water that contains ammonia can not discharge from flue gas air outlet 5 externally, in this application embodiment, as shown in fig. 3A, set up the defogging breakwater 13 of a plurality of vertical settings in flue gas air outlet 5 department, the face of defogging breakwater 13 is the face folding plate that has a plurality of dog-ears, the flue gas can pass through defogging breakwater 13 after discharging from last row of condenser tube 102a, under the effect of the zigzag surface of face folding plate, the speed of flue gas can descend, comdenstion water in the flue gas can bond the surface of defogging breakwater 13 and leave the bottom of device along defogging breakwater 13 surface. The arrangement of the demisting water-collecting baffle 13 can prevent condensed water in the flue gas from being discharged to the outside from the flue gas port.

Furthermore, the folded panel at least comprises a pair of folding angles which are folded towards opposite directions. Through the mode, the travel of the smoke on the folded panel can be increased, and the collection of the moisture mixed in the smoke is facilitated.

As a preferred embodiment, one section of the folded panel close to the smoke outlet is a straight section, and the function of the folded panel is to guide smoke to flow along the demisting water-collecting baffle 13. Further, at least part defogging manger plate 13 that catchments has along the shaping of defogging manger plate 13 surface that catchments the slotted hole that is regarded as the drainage hole of vertical extension, and the comdenstion water that bonds to defogging manger plate 13 surface that catchments can flow to the device bottom along the slotted hole and arrange outward. Preferably, the oblong hole extends from the upper end to the bottom end of the folded panel.

In order to further improve the safety of the smoke emission, a steel wire mesh 14 is arranged on the outer side of the demisting water-collecting water baffle 13 to stop the condensed water in the smoke.

In conclusion, the self-sustaining one-step purification equipment provided by the application is applied to flue gas purification treatment scenes such as cement kilns, power plants or coal yards and the like, and can effectively reduce escaping ammonia and SO in discharged flue gas ₂ 、NOx、CO ₂ Content of (d) and dust content.

In one embodiment of the purification equipment, when the flue gas air temperature of the flue gas air inlet is 105 ℃, the moisture content of the flue gas is 9.5 percentAnd escaped ammonia of 20mg/m ³ 、SO ₂ The content is 15mg/m ³ NOx content 38mg/m ³ 、CO ₂ The concentration is 20.5 percent, and the dust content is 6mg/m ³ When the water temperature of the cooling water inlet is 28 ℃,

(1) The air temperature of the flue gas outlet is 60 ℃, the water content of the flue gas is 6.5 percent, and the escaped ammonia is 6mg/m ³ 、SO ₂ The content is 5mg/m ³ NOx content of 34mg/m ³ 、CO ₂ The concentration is 18.5 percent, and the dust content is 3mg/m ³ And the temperature of the cooling water at the outlet is 46 ℃.

(2) When the cooling water amount in the low-temperature condensation module is increased to enable the air temperature of a flue gas outlet of the purifying equipment to be 50 ℃, the water content of the flue gas is 5.0%, and the escaped ammonia is 3mg/m ³ 、SO ₂ The content is 2mg/m ³ NOx content 32mg/m ³ 、CO ₂ The concentration content is 17.5 percent, and the dust content is 2mg/m ³ And the temperature of the cooling water at the outlet is 41 ℃.

In another embodiment of the purification equipment, when the flue gas air temperature of the flue gas air inlet is 150 ℃, the moisture content of the flue gas is 7.5 percent, and the escaped ammonia is 80mg/m ³ 、SO ₂ The content is 150mg/m ³ NOx content 40mg/m ³ 、CO ₂ The concentration is 21.0 percent, and the dust content is 5mg/m ³ When the water temperature of the cooling water inlet is 28 ℃,

the air temperature of a flue gas outlet is 65 ℃, the moisture content of the flue gas is 6.0 percent, and the escaped ammonia is 15mg/m ³ 、SO ₂ The content is 42mg/m ³ NOx content 36mg/m ³ 、CO ₂ The concentration is 19.0 percent, and the dust content is 3mg/m ³ At this point, the cooling water outlet temperature is 65 ℃.

For the case that the air temperature at the flue gas inlet is high, the moisture content of the flue gas is low, or the content of the escaping ammonia at the flue gas inlet is high, in order to further improve the purifying efficiency of the escaping ammonia, as shown in fig. 1B and fig. 2A, the embodiment of the present application provides a self-sustaining one-step purifying apparatus with an atomizing device, the atomizing device 3 is used for atomizing water toward the flue gas inlet 4, the setting position of the atomizing device 3 is the flue gas inlet 4, more specifically, the atomizing device 4 is arranged at the trapezoidal joint of the connection position of the flue gas discharge port of the cement kiln and the flue gas inlet 4 of the purifying apparatus, but it should be noted that the setting position of the atomizing device 3 is not limited to the flue gas inlet 4, for example, in some other embodiments, the atomizing device 3 may also be arranged at the flue gas discharge port of the cement kiln or at a position further ahead. The water content in the flue gas can be increased by spraying the atomized water to the air inlet of the flue gas. The specific principle is as follows: because the flue gas temperature is high, atomized water can be evaporated into steam by the high temperature of the flue gas after entering the flue gas, thereby increasing the steam content in the flue gas, and when the steam content in the flue gas is lower, the atomized water can improve the steam content in the flue gas through the atomizing device 3, thereby improving the deamination efficiency. In addition, can also add the medicament (to the chemical that deamination, denitration, desulfurization are helpful) in atomizing aquatic, add the medicament through the mode of atomizing water, can let medicament and flue gas fully contact, further improve the cleanliness factor of exhaust flue gas. Finally, the atomized water can also cool the flue gas, and the working pressure of the subsequent low-temperature condensation module 1 is reduced.

Atomizing device is including the atomizing water tank, water-spraying system and the spraying water pipe that connect gradually, the atomizing water tank connects the water source, the spraying water pipe is located flue gas air inlet department is used for court the atomizing water of flue gas air inlet department.

Furthermore, the atomization device further comprises an atomization water flow control mechanism for controlling the amount of atomization water in the smoke air inlet from the atomization water pipe.

The air temperature of the flue gas at the flue gas inlet is higher than 120 ℃, the water content of the flue gas at the flue gas inlet is less than 8%, or the escaped ammonia at the flue gas inlet is 100mg/m ³ And then starting the atomization device.

When SO is arranged at the flue gas air inlet ₂ The content is more than 100mg/m ³ Starting the atomization device, and adding a desulfurization agent into the atomized water; and/or when the Nox content at the flue gas air inlet is more than 50mg/m ³ And starting the atomization device, and adding a denitration medicament into the atomized water.

In one embodiment of the purification equipment, when the flue gas air temperature of the flue gas air inlet is 150 ℃, the moisture content of the flue gas is 7.5 percent, and the escaped ammonia is 80mg/m ³ 、SO ₂ The content is 150mg/m ³ NOx content 40mg/m ³ 、CO ₂ The concentration is 21.0 percent, and the dust content is 5mg/m ³ When the water temperature of the cooling water inlet is 28 ℃,

starting the atomizing device 3, adjusting the water content of the inlet flue gas to 9.0 percent, reducing the temperature of the inlet air to 128 ℃, increasing the amount of cooling water to ensure that the water content of the flue gas is 5.0 percent and the escaped ammonia is 4mg/m when the air temperature of the flue gas outlet of the purifying equipment is 55 DEG C ³ 、SO ₂ 18mg/m ³ NOx content of 34mg/m ³ 、CO ₂ The concentration is 17.8 percent, and the dust content is 1.5mg/m ³ At this point, the cooling water outlet temperature is 48 ℃.

As a preferred embodiment of the present application, the purification apparatus further comprises a spray cleaning device 2. Because contain the particulate matter in the flue gas, the condenser tube 102 of cryocondensation module 1 and the long-time contact of flue gas lead to the particulate matter can bond and be difficult to get rid of on the surface of condenser tube spare, the heat exchange efficiency (to the cooling efficiency of flue gas promptly) of cryocondensation module 1 has been reduced, for this reason, as shown in fig. 1B, through spray set 2 to cement kiln flue gas outlet 5 and deamination device's junction shower, the shower is the column and spouts flue gas mouth department, the flue gas of the fast circulation that blows off along with cement kiln flue gas outlet 5 washes to the condenser tube spare on the surface, wash away the particulate matter that bonds on the pipe fitting surface.

The embodiment of the application also provides a purification process using the self-supporting one-step purification equipment, which is used for purifying the flue gas of the flue gas emission equipment to be purified, and the purification process mainly comprises the following steps:

installing the self-sustaining one-step high-efficiency purification equipment to a smoke outlet of smoke emission equipment to be purified, and enabling the smoke air inlet of the self-sustaining one-step high-efficiency purification equipment to be in sealing connection with the smoke outlet of the smoke emission equipment to be purified;

starting the self-supporting one-step method high-efficiency purification equipment, cooling the flue gas to condense the water vapor in the flue gas into condensed water, dissolving the ammonia gas and acidic pollutants in the flue gas into the condensed water to generate acid-base neutralization reaction to generate non-volatile salt which is easily dissolved in the condensed water.

In order to improve the deamination rate, further, the purification process further comprises the following steps: through set up atomizing device in flue gas air inlet department, to atomizing water increases the vapor content in the flue gas in flue gas air inlet department, and the experiment proves, can improve the deamination rate greatly through improving vapor content in the flue gas.

Because the flue gas contains particulate matter, the cooling water pipe 102 of the low-temperature condensation module 1 contacts with the flue gas for a long time to cause the particulate matter to be bonded on the surface of the cooling water pipe and difficult to remove, so that the heat exchange efficiency of the low-temperature condensation module 1 (namely the cooling efficiency of the flue gas) is reduced, and for this reason, the purification process further comprises: spraying water to the joint of the cement kiln flue gas outlet 5 and the flue gas air inlet of the self-sustaining one-step purification equipment through the spraying device 2, wherein the spraying water is sprayed to the flue gas inlet in a columnar shape, and flue gas which flows fast and is blown out along with the cement kiln flue gas outlet 5 is flushed onto the surface of a cooling water pipe, so that particles adhered to the surface of the pipe are flushed away.

In addition, the purification process further comprises: and treating the salt-containing condensed water collected at the bottom of the self-sustaining one-step efficient purification equipment into reusable or externally-discharged purified water and salt-containing high-concentration water by a membrane separation method, wherein the salt-containing high-concentration water is sprayed onto a grate cooler of the to-be-purified flue gas emission equipment. The advantages of this step have already been described above and will not be described further here.

The embodiment of the application also provides a modularized purification device, wherein the purification device in the embodiment is modularized, the modularized purification device comprises a plurality of purification device sub-modules, and the purification device sub-modules can be arranged in parallel and/or in series. The submodules are standardized, and the number of the stator modules and the connection mode among the submodules are arranged according to requirements and fields.

Specifically, in one embodiment of the present application, one decontamination apparatus may be fabricated into two decontamination apparatus sub-modules, which are placed side-by-side together during field installation. Further, in order to ensure the connection reliability between the two sub-modules, the two sub-modules of the purification device can be connected by bolting and welding.

In addition, the submodules can also be placed at intervals, the cement kiln flue gas outlet 5 is shunted to each branch pipeline and enters each submodule respectively, and finally, the flue gas and the flue gas of all the submodules are collected and discharged.

Because the sub-modules are in standardized design, when the practical application scene exceeds the purification capacity of the sub-modules, the sub-modules can be connected in series along the smoke flowing direction for use.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-cleaning self-sustaining one-step method purifying equipment is characterized in that the equipment is used for purifying flue gas containing water vapor, ammonia gas and acidic pollutants; the purification apparatus includes:

the box body is provided with a smoke air inlet, a smoke air outlet and a smoke channel formed from the smoke air inlet to the smoke air outlet;

and the spraying and washing device is arranged at the flue gas air inlet and used for spraying washing water to the flue gas air inlet, and the washing water quickly enters the low-temperature condensation module along with flue gas air to scour the surfaces of the water pipes of the cooling water pipe bundles.

2. The self-cleaning self-sustaining one-step process decontamination apparatus of claim 1, further comprising

And the atomization device is arranged at the flue gas air inlet and used for atomizing water at the flue gas inlet so as to increase the water vapor content in the flue gas.

3. The self-cleaning self-sustaining one-step process purification apparatus of claim 2, wherein an agent for ammonia removal and/or desulfurization and/or denitrification is added to the atomized water of the atomization device.

4. The self-cleaning, self-sustaining, one-step process cleaning apparatus according to claim 3, wherein the chilled water bundles are arranged in a fork-bank bundle array.

5. The self-cleaning self-sustaining one-step-process purifying apparatus according to claim 4, wherein the cooling water tube bundle is divided into a plurality of cooling water tube banks along a flue gas flowing direction, each cooling water tube bank includes a plurality of rows of cooling water tubes arranged along the flue gas flowing direction, two adjacent rows of cooling water tubes in the plurality of rows of cooling water tubes are staggered in the flue gas flowing direction, and no gap exists between the orthographic projection surfaces.

6. The self-cleaning self-sustaining one-step purification apparatus according to claim 5, wherein the three cooling water tubes in two adjacent rows form a triangular cooling water tube unit, and the size of the cooling water tube unit is:

C＝1.8A～2A；

D＝0.8B～1.5B；

wherein A is the maximum width dimension of the tube cross section; b is the maximum length dimension of the tube section; c is the size of the center distance of the pipe sections of two adjacent cooling water pipes in the same row; d is the size of the center distance of the pipe sections of the adjacent rows of cooling water pipes.

7. The self-cleaning self-sustaining one-step process purification apparatus of claim 5, wherein the cooling water tubes are arc diamond cooling water tubes comprising: the cooling water pipe body is characterized by comprising a cooling water pipe body, wherein the cross section of the cooling water pipe body is in an arc rhombus shape, two ends of a short diagonal line of the cooling water pipe body are arc ends respectively, and two ends of a long diagonal line of the cooling water pipe body are tip ends respectively;

the arc ends at the two ends of the short diagonal line are connected with the tip ends at the two ends of the long diagonal line through straight edges respectively, and the straight edges are tangent to the arc lines of the arc ends.

8. The self-cleaning self-sustaining one-step process purification apparatus of claim 7, wherein the circular arc ends at both ends of the short diagonal line are concentrically arranged; and/or the connecting line of the middle points of the arc ends at the two ends of the short diagonal line is vertical to the connecting line of the tip ends at the two ends of the long diagonal line.

9. The self-cleaning, self-sustaining, one-step process purification apparatus of claim 1, wherein the end fitting assemblies comprise upper and lower end fitting assemblies that are alternately disposed above and below the cooling water tube bundle in the direction of flow of the flue gas and each of which extends through the ends of a plurality of rows of cooling water tubes to form parallel conduits within the cooling water tube bundle for the co-flow of at least two rows of parallel water streams; the upper end assembly is an upper header tank, the lower end assembly is a lower header tank, the upper header tank comprises a plurality of upper header tank subsections which are arranged above the cooling water pipe bundle along the smoke circulation direction and serve as the end connectors, the lower header tank comprises a plurality of lower header tank subsections which are arranged below the cooling water pipe bundle along the smoke circulation direction and serve as the end connectors, the plurality of rows of cooling water pipes communicated with each header tank subsection comprise water inlet pipelines and water outlet pipelines which are arranged side by side along the smoke circulation direction, and the rows of the water inlet pipelines and the water outlet pipelines are the same; one of the upper water collecting tank and the lower water collecting tank further comprises a cooling water inlet tank communicated with the cooling water inlet, the other one of the upper water collecting tank and the lower water collecting tank further comprises a cooling water return tank communicated with the cooling water return port, and the cooling water inlet tank and the cooling water return tank are respectively communicated with at least two rows of cooling water pipes; the cooling water bank of tubes is divided into a plurality of cooling water nest of tubes along flue gas circulation direction, every the cooling water nest of tubes includes the edge the multirow cooling water pipe that the flue gas circulation direction was arranged, and every the cooling water nest of tubes corresponds and communicates a set ofly the cooling water inlet with the cooling water return water mouth, it is a plurality of cooling water between the cooling water nest of tubes is in the cooling water is restrainted and is not communicated in the beam.

10. The self-cleaning self-sustaining one-step process cleaning apparatus of claim 9, wherein the flow rate of cooling water from the cooling water tube bank adjacent to the flue gas outlet is less than the flow rate of cooling water from the cooling water tube bank adjacent to the flue gas inlet.

11. The self-cleaning, self-sustaining, one-step process purification apparatus according to claim 10, further comprising a cooling water inlet manifold in communication with each of the cooling water inlets via a flow control valve.

12. The self-cleaning, self-sustaining, one-step process purification apparatus according to claim 1, further comprising a condensate collection device disposed at the bottom of the cryocondensation module for collecting the condensate, the condensate collection device being connected to a condensate drain.