Boiler moisture absorption smoke temperature recovery tower

Abstract

A boiler moisture absorption smoke temperature recovery tower belongs to the technical field of boiler environmental protection. The utility model aims to add a boiler moisture absorption smoke temperature recovery tower capable of effectively converting and utilizing heat energy in smoke after desulfurization on the basis of desulfurization of the existing boiler. The smoke temperature recovery tower comprises a venture temperature absorber and a smoke temperature recovery tower body, the upper half part of the smoke temperature recovery tower body is a cold and heat exchange part, and the lower half part of the smoke temperature recovery tower body is a cooling water supply part. The heat energy conversion device is in butt joint with conversion of heat energy in waste water after flue gas treatment after boiler combustion, the heat energy is effectively converted into a heat supply mechanism, waste is turned into wealth, and contribution is made to energy conservation and emission reduction.

Description

Technical Field

[0001] The utility model belongs to the technical field of boiler environmental protection. Background Art

[0002] With the rapid development of science and technology, people's living standards have been rapidly improved, which has put environmental protection on a higher agenda. Central heating is currently a widely used heating method in the north. The remaining heat basically comes from the emission of industrial boilers. In order to protect the environment, the emission indicators of heating boilers have been modified. The flue gas emitted by the existing boiler is discharged into the atmosphere after desulfurization treatment. However, there is still a lot of heat energy in the flue gas, which is discharged into the atmosphere in vain and cannot be used. Summary of the invention

[0003] The utility model aims to add a boiler literati moisture absorption and smoke temperature recovery tower which can effectively convert and utilize the heat energy in the smoke on the basis of the desulfurization of the existing boiler.

[0004] The utility model comprises a Wenshi temperature absorber and a smoke temperature recovery tower body, wherein the upper half of the smoke temperature recovery tower body is a cold and heat exchange part, and the lower half is a cooling water supply part;

[0005] Cold and heat exchange part: the first group of cold water drain pipes and the second group of cold water drain pipes are respectively installed in the cold and heat exchange part tower body from both sides, the first group of cold water drain pipes and the second group of cold water drain pipes are independently connected to the cold water supply system through the water inlet and return port, and the first group of cold water drain pipes and the second group of cold water drain pipes are placed on the pipe wall inside the flue gas temperature recovery tower body with heat absorbing plates; the cold and heat exchange part of the flue gas temperature tower body is connected with the hot water source provided by the boiler through the heat recovery pipe; a spare heat recovery pipe is opened in the cold and heat exchange part;

[0006] Cooling water supply part: The cooling water supply part is connected to the inside of the boiler supply cold water cooling mechanism through a cooling water supply pipeline; there is a smoke temperature recovery tower security door on the cooling water supply part; a smoke temperature tower bottom stirring device is installed on the side wall of the cooling water supply part of the smoke temperature tower body, and the smoke temperature tower bottom stirring shaft of the smoke temperature tower bottom stirring device extends into the cooling water supply part, and a smoke temperature tower bottom stirring blade is installed at the end;

[0007] A Wenshi temperature absorber is installed at the upper end of the smoke temperature tower body. The Wenshi temperature absorber is connected to the top of the smoke temperature tower body through a pipeline. One end of the Wenshi temperature absorber is connected to the air inlet bellows of the boiler through the right pipeline, and the other end is connected to the air preheater through the left pipeline.

[0008] The utility model is connected to the conversion of heat energy in waste water after flue gas treatment after boiler combustion, effectively converts heat energy to a heating mechanism, turns waste into treasure, and contributes to energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the overall structure of the smoke temperature recovery tower of the utility model;

[0010] Figure 2 It is a schematic diagram of the right side of the smoke temperature recovery tower of the utility model;

[0011] Figure 3 This utility model Figure 2 Part E is an enlarged schematic diagram;

[0012] Figure 4 This utility model Figure 2 Part F is an enlarged schematic diagram;

[0013] Figure 5 This is a process flow chart of a smoke temperature recovery tower of the utility model. DETAILED DESCRIPTION

[0014] The upper part of the flue gas temperature recovery tower body 202 is a cold and heat exchange part. The first group of cold water drain pipes 211 and the second group of cold water drain pipes 210 are respectively installed in the cold and heat exchange part tower body from both sides. The first group of cold water drain pipes 211 and the second group of cold water drain pipes 210 are connected to the cold water source through the water inlet and outlet. The first group of cold water drain pipes 211 and the second group of cold water drain pipes 210 are two independent cold water pipelines. The water inlet and outlet at both ends are respectively placed outside the flue gas temperature recovery tower body 202 ( Figure 1 In the figure, the water inlet 205 and the water outlet 206 of the first group of cold water pipes 211 are respectively connected to the water inlet and return pipes of the heating system, and the water inlet and outlet of the second group of cold water pipes 210 are not shown in the figure); the cold and heat exchange part of the smoke temperature tower body 202 is connected to the upstream outlet pipeline containing hot waste water through the heat recovery pipe 209. A spare heat recovery pipe 208 is opened in the cold and heat exchange part. This heat pipe is a spare hot water supply pipe. When the heat energy provided by the heat recovery pipe 209 is insufficient, this pipe can be connected to the outlet of other hot water to provide heat exchange water in the tower. The lower half of the smoke temperature tower body 202 is the cooling water supply part, and the cooling water supply part can supply other supply equipment that needs cooling water through the cooling water supply pipeline 207. There is a smoke temperature recovery tower security door 212 on the cooling water supply part; a smoke temperature tower bottom stirring device 215 is installed on the side wall of the cooling water supply part of the smoke temperature tower body 202, and the smoke temperature tower bottom stirring shaft 214 of the smoke temperature tower bottom stirring device 215 extends into the interior of the cooling water supply part, and a smoke temperature tower bottom stirring blade 213 is installed on the end.

[0015] The smoke temperature recovery tower can be roughly understood as a heat exchange storage device (the present invention Figure 1 and Figure 2 The upper part and Figure 3), two groups of cold and heat exchange pipelines are arranged (a first group of cold water drain pipes 211 and a second group of cold water drain pipes 210. In order to increase the heating area, heat-conducting blades 212 are arranged on the pipes of the first group of cold water drain pipes 211 and the second group of cold water drain pipes 210). Cold water flows in the cold and heat exchange pipelines. The cold water in the pipes is heated by the hot air flow (or hot water) in the tower body (outside the cold and heat exchange pipes). The hot water is sent to the heat network through the hot water supply pipe 206 (water outlet 206) connected to the heat network. The cold water after the heat dissipation of the heat network enters the cold and heat exchange pipelines in the smoke temperature recovery tower through the cold return water pipe 205 (water inlet 205) for heating, thereby circulating. The heat source of the flue gas temperature recovery tower is achieved through the heat source inlet pipe 209 in the tower. That is to say, one end of the heat source inlet pipe 209 in the tower is connected to the heating liquid, and the other end transports the hot liquid to the flue gas temperature recovery tower to heat the cold and heat exchange pipeline. A spare heat source input pipe 208 is set in the flue gas temperature recovery tower. That is, when the heat source inlet pipe 209 in the tower provides insufficient heat source, or the upstream heat source continues to release, this spare heat source input pipe 208 is also connected to the heat source to perform the same work as the heat source inlet pipe 209 in the tower.

[0016] The lower part of the smoke temperature recovery tower is a liquid storage part. After the heat source (liquid in the utility model) entering from the heat source inlet pipe 209 or / and the standby heat source input pipe 208 in the tower heats the cold and heat exchange pipeline, it falls into this part. It can be understood that the liquid in this part is basically cooled or semi-cooled. This liquid is sent to the heating equipment (heat source providing equipment) through the pump and the liquid outlet pipe 207. The auxiliary overflow pipe 207 is to prevent the liquid in the lower part of the smoke temperature recovery tower from being too high and affecting the heat exchange. Therefore, when the liquid level exceeds the set height, this pump will be started to send the liquid out through the auxiliary overflow pipe 207.

[0017] A tower bottom stirring device 215 is arranged at the lower part of the flue gas temperature recovery tower. Since the heat source liquid entering from the heat source inlet pipe 209 and / or the standby heat source input pipe 208 in the tower may contain some impurities, it is very likely to condense when sinking into the flue gas temperature recovery tower. Therefore, the tower bottom stirring device 215 is used to stir the liquid to prevent condensation. When the liquid accumulates for a certain period of time, personnel can enter through the security door 216 of the flue gas temperature recovery tower to clean it.

[0018] The utility model is provided with a Wenshi temperature absorber 203 at the upper end of the smoke temperature tower body 202, and the Wenshi temperature absorber 203 is connected with the top of the smoke temperature tower body 202 through a pipeline, one end of the two sides of the Wenshi temperature absorber 203 is connected with the air inlet bellows of the boiler through the right pipeline 204, and the other end is connected with the air preheater through the left pipeline 201.

[0019] When the central heating boiler is burning, the coal quality is divided into long-smoke coal and short-smoke coal. When long-smoke coal is burned, the heat balance is larger and broader, and the combustion efficiency is high. In order to improve the combustion state of coal quality and the combustion state of volatile matter, high-temperature (300℃-500℃) and high-humidity (60%-80%) partial air supply is added. As the high-temperature and high-humidity air participates in the combustion, the flame volume increases, making the heat load in the furnace more uniform. As the high-humidity steam participates in the combustion of the boiler, the volume of the delta flame is expanded, which reduces the enthalpy value per unit volume, thereby suppressing the conditions for the generation of thermal nitrogen oxides. The boiler scholar's combustion adjustment and nitrogen reduction technology is a technology that adjusts the combustion state of coal quality and the generation state of the delta flame, so as to reduce the thermal load of the boiler grate area and increase the thermal load of the boiler furnace volume, thereby improving the combustion efficiency of the boiler coal quality and the combustion efficiency of the coal-based combustible gas, while suppressing the space for the generation of thermal nitrogen oxides.

[0020] When the waste heat of boiler flue gas enthalpy is recovered, a large volume of water vapor is generated, atomized water vapor, which contains a certain amount of enthalpy calorific value. When discharged to the outside, a certain amount of energy is bound to be lost. This water vapor medium is an effective product for effectively regulating boiler combustion. By using the method of increasing wind pressure by air supply, these water vapors are sucked into the pipeline through the scribe channel under negative pressure. The temperature is heated to 300℃-500℃ by an electric heater at 120℃. When sent to the furnace, it is mixed with the air supply for combustion, which reduces the oxygen content per unit area, expands the combustion volume, reduces the grate temperature when the grate is burned, effectively prolongs the service life of the grate, prolongs the flame combustion length, makes the coal quality combustion more efficient, increases the volume of the δ flame, and increases the combustion efficiency, thereby improving the boiler combustion efficiency by 5%. Due to the high temperature and high humidity participating in the δ flame combustion, the volume of the δ flame is expanded, and the unit volume enthalpy of the δ flame is reduced, thereby suppressing the probability of nitrogen oxide generation, and reducing the generation of nitrogen oxides by 10%.

[0021] High temperature and high humidity air supply has extremely low corrosion to equipment. It reduces the heating temperature of the grate, increases the service life of the grate, increases the flame burning length, improves the combustion efficiency by 5%, reduces the unit area enthalpy of the delta flame, inhibits the probability of thermal nitrogen oxides generation, and reduces nitrogen oxides by 10%.

[0022] By adjusting the air supply medium, the combustion state of the boiler is changed, thereby improving the thermal efficiency of boiler combustion, reducing the probability of nitrogen oxide generation, and achieving the effect of energy conservation and emission reduction.

Claims

1. A boiler smoke temperature recovery tower, characterized in that: It comprises a Wenshi temperature absorber (203) and a smoke temperature recovery tower body (202), wherein the upper part of the smoke temperature recovery tower body (202) is a cold and heat exchange part, and the lower part is a cooling water supply part; Cold and heat exchange part: the first group of cold water drain pipes (211) and the second group of cold water drain pipes (210) are respectively installed in the cold and heat exchange part tower body from both sides, the first group of cold water drain pipes (211) and the second group of cold water drain pipes (210) are independently connected to the cold water supply system through the water inlet and return ports, and the first group of cold water drain pipes (211) and the second group of cold water drain pipes (210) are placed inside the flue gas temperature recovery tower body (202) and have heat absorbing plates (212) on the pipe walls; the cold and heat exchange part of the flue gas temperature recovery tower body (202) is connected to the hot water source provided by the boiler through the recovery heat pipe (209); a spare recovery heat pipe (208) is provided in the cold and heat exchange part; Cooling water supply part: the cooling water supply part is connected to the interior of the boiler supply cold water cooling mechanism through a cooling water supply pipeline (207); a smoke temperature recovery tower security door (216) is provided on the cooling water supply part; a smoke temperature tower bottom stirring device (215) is installed on the side wall of the cooling water supply part of the smoke temperature recovery tower body (202); a smoke temperature tower bottom stirring shaft (214) of the smoke temperature tower bottom stirring device (215) extends into the interior of the cooling water supply part, and a smoke temperature tower bottom stirring blade (213) is installed at the end thereof; A Wenshi heat absorber (203) is installed at the upper end of the flue gas temperature recovery tower body (202). The Wenshi heat absorber (203) is connected to the top of the flue gas temperature recovery tower body (202) through a pipeline. One end of the Wenshi heat absorber (203) is connected to the air inlet wind box of the boiler through the right pipeline (204), and the other end is connected to the air preheater through the left pipeline (201).

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