Waste heat steam de-whitening discharge system and de-whitening discharge method

Abstract

A waste heat steam de-whitening and emission system and a de-whitening and emission method thereof, comprising: an equipment box, a steam condensing heat exchanger, a steam fan, a mixing chamber, a heat dissipation heat exchanger, an air fan, a steam inlet, an air inlet, an exhaust port and a control system; a steam inlet and an air inlet are respectively provided on both sides of the equipment box; an exhaust port is provided on one side of the equipment box other than the two sides; the steam inlet is used to connect with the outlet of the waste heat steam, and the air inlet is used to allow air to enter the equipment box; combined with other structures and methods, the defects of the prior art that the equipment for treating waste heat or exhaust gas with a large amount of moisture vapor is bulky, expensive, requires a large amount of energy to consume during the treatment process, requires a large amount of treatment and operation costs, and enterprises cannot bear the increase in these costs, resulting in the inability to effectively implement these projects that require rectification and treatment of waste heat or exhaust gas with a large amount of moisture vapor.

Description

Technical Field

[0001] The present invention relates to the technical field of de-whitening and emission, and in particular to a waste heat steam de-whitening and emission system and a de-whitening and emission method thereof. Background Art

[0002] Waste heat emission, also known as residual heat emission, refers to the heat energy produced by humans in their activities for some needs. The heat energy that is no longer used is discharged after the use is completed. Waste steam emission refers to the pollutants in the waste steam discharged from the chimney or exhaust pipe hole, which is a serious source of pollution to the atmospheric environment. As people's environmental awareness continues to increase, some manufacturing companies have problems with waste heat emissions or waste steam emissions, where a large amount of water vapor is directly discharged into the atmosphere. In particular, the visual impact of a large amount of water vapor emissions on the environment has attracted more and more attention.

[0003] Such emissions have caused local residents and environmental protection departments to request the emission department to rectify and treat the emission of these waste heat or exhaust gases. However, these waste heat or exhaust gases with a large amount of water vapor are generated during normal production processes, and the emission of waste heat or exhaust gases with a large amount of water vapor is large and will be continuously emitted for a long time.

[0004] In the prior art, technical solutions for treating waste heat or waste gas containing a large amount of water vapor, such as gas-to-gas heat exchange combined with electromagnetic or electrostatic treatment, have the following problems: the corresponding treatment equipment is bulky and expensive, the treatment process consumes a lot of energy, and requires a large investment in treatment and operation costs. As a result, many companies that need to treat waste heat or waste gas containing a large amount of water vapor cannot afford the increase in these costs, which directly leads to the inability to effectively implement these projects that require rectification and treatment of waste heat or waste gas containing a large amount of water vapor. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a waste heat steam dewhitening emission system and a dewhitening emission method, which effectively avoids the defects in the prior art that the equipment for treating waste heat or exhaust gas with a large amount of water vapor is bulky, expensive, the treatment process requires a large amount of energy consumption, and requires a large investment in treatment and operation costs. Enterprises cannot afford the increase in these costs, resulting in the inability to effectively implement these projects that require rectification and treatment of waste heat or exhaust gas with a large amount of water vapor.

[0006] In order to overcome the deficiencies in the prior art, the present invention provides a solution for a waste heat steam de-whitening and discharge system and a de-whitening and discharge method thereof, which are as follows:

[0007] A waste heat steam de-whitening discharge system, comprising:

[0008] Equipment box 1, steam condensing heat exchanger 2, steam fan 4, mixing chamber 15, heat dissipation heat exchanger 3, air fan 5, steam air inlet 16, air inlet 17, exhaust port 18 and control system;

[0009] The two sides of the equipment box 1 are respectively provided with a steam inlet 16 and an air inlet 17; an exhaust port 18 is provided on one side of the equipment box 1 except the two sides; the steam inlet 16 is used to connect with the outlet of the waste heat steam, and the air inlet 17 is used to allow air to enter the equipment box 1;

[0010] Inside the equipment box 1, a steam condensing heat exchanger 2, a steam fan 4, a mixing chamber 15, a heat dissipation heat exchanger 3 and an air fan 5 are sequentially arranged along the direction from the steam inlet 16 to the air inlet 17, and the mixing chamber 15 is connected to the exhaust port 18;

[0011] The control system is used for controlling and connecting with the steam blower 4 and the air blower 5 .

[0012] Furthermore, a water receiving pan 7 is provided in the equipment box 1 and directly below the steam condensing heat exchanger 2 , and a drain port 6 communicating with the water receiving pan 7 is also provided on the equipment box 1 .

[0013] Furthermore, the steam condensing heat exchanger 2 includes a multi-channel metal tube 2-1 and a plurality of metal fins 2-2 tightly connected to the outer wall of the metal tube 2-1;

[0014] The heat dissipation heat exchanger 3 includes a multi-channel metal tube 3-1 and a plurality of metal fins 3-2 tightly connected to the outer wall of the metal tube 3-1.

[0015] Furthermore, one end of the metal tube 1 2-1 is connected to one end of the metal tube 2 3-1 through the pipeline 1, and the other end of the metal tube 1 2-1 is connected to the other end of the metal tube 2 3-1 through the pipeline 2; the pipeline 1 and the pipeline 2 constitute a liquid transmission pipeline 11, and the liquid transmission pipeline 11 contains a liquid heat transfer medium;

[0016] The structure in which one end of the metal tube 1 2-1 is connected to one end of the metal tube 2 3-1 through a pipeline is as follows:

[0017] One end of the metal tube 1 2-1 is connected to one end of the pipeline 1 through the water distributor 1 2-4, and the other end of the pipeline 1 is connected to one end of the metal tube 2 3-1 through the water collector 2 3-4;

[0018] The structure in which the other end of the metal tube 1 2-1 is connected to the other end of the metal tube 2 3-1 through the pipeline 2 is as follows:

[0019] The other end of the metal tube 1 2 - 1 is connected to one end of the pipeline 2 through the water collector 1 2 - 3 , and the other end of the pipeline 2 is connected to the other end of the metal tube 2 3 - 1 through the water distributor 2 3 - 3 .

[0020] Furthermore, the liquid heat transfer medium includes but is not limited to water, antifreeze or heat transfer oil.

[0021] Furthermore, the pipeline 1 is provided with a pressure relief safety valve 13 and an automatic exhaust valve 12 ; the pipeline 2 is provided with a water pump 10 and an expansion tank 14 , and the control system is also used for controlling the connection with the water pump 10 .

[0022] Furthermore, the pipeline 1 is also connected to the pipeline 3 provided with a water supply valve 8.

[0023] Furthermore, the pipeline 2 is also connected to the pipeline 4 provided with a drain valve 9.

[0024] A de-whitening and discharging method of a waste heat steam de-whitening and discharging system, comprising:

[0025] Step 1: The control system controls the water pump 10, the steam fan 4 and the air fan 5 to operate, and the waste heat steam enters the equipment box 1 through the steam inlet;

[0026] Step 2: When the waste heat steam passes through the gap between the metal fins 2-2 of the steam condensation heat exchanger 2, the heat is transferred to the metal fins 2-2, and the metal fins 2-2 transfer the heat to the metal tube 2-1, and then the heat is transferred to the liquid heat transfer medium flowing in the tube driven by the water pump 10 through the tube wall of the metal tube 2-1;

[0027] Step 3: At this time, the waste heat steam temperature drops and condenses to form condensed water, which flows to the water receiving tray 7 and is discharged from the drain port 6, thereby achieving cooling, condensation and dehumidification of the waste heat steam;

[0028] Step 4: The waste heat steam after cooling, condensing and dehumidification is pressurized by a steam blower and enters the mixing chamber 15;

[0029] Step 5: The liquid heat transfer medium flowing in the metal tube 1 2-1 that absorbs heat in the steam condensing heat exchanger 2 flows to the metal tube 2 3-1 of the heat dissipation heat exchanger 3 through the power provided by the water pump 10, and its heat is transferred to the metal fin 2 3-2 through the tube wall of the metal tube 2 3-1, and then transferred to the outdoor air that enters through the air inlet 17 and flows through the heat dissipation heat exchanger after being pressurized by the air fan 5 through the metal fin 2 3-2, so that its temperature is increased;

[0030] Step 6: The heated outdoor air enters the mixing chamber 15 and mixes with the waste heat steam that has been cooled, condensed and dehumidified and entered the mixing chamber. After being discharged through the exhaust port 18, it enters the outdoor ambient air as a relatively low humidity gas that is not prone to condensation, thereby achieving the purpose of whitening discharge.

[0031] Furthermore, when the liquid heat transfer medium needs to be supplemented, the pipeline 3 can be connected to the liquid heat transfer medium source and the liquid delivery pipeline 11 can be supplemented with the liquid heat transfer medium by opening the water replenishment valve 8;

[0032] When the liquid heat transfer medium needs to be discharged, the liquid heat transfer medium is discharged through the pipeline 4 by opening the drain valve 9;

[0033] The automatic exhaust valve 12 can timely remove the air in the liquid heat transfer medium;

[0034] The pressure relief safety valve 13 and the expansion tank 14 can reduce the pressure of the liquid heat transfer medium in time when the pressure in the liquid transmission pipeline 11 is too high.

[0035] The beneficial effects of the present invention are:

[0036] The present invention adopts a fin-type gas-liquid heat exchange method in which metal fins with high heat exchange efficiency are closely connected to metal tubes. It is light in weight, high in heat exchange efficiency, and has a mature manufacturing process. It effectively avoids the defects of the prior art that the equipment for treating waste heat or waste gas with a large amount of water vapor is bulky, expensive, consumes a lot of energy during the treatment process, and requires a large amount of treatment and operation costs. Enterprises cannot afford the increase in these costs, resulting in the inability to effectively implement these projects that require rectification and treatment of waste heat or waste gas with a large amount of water vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is the overall structural diagram of the waste heat steam dewhitening emission system of the present invention.

[0038] Figure 2 It is a partial flow chart of the dewhitening and emission method of the waste heat steam dewhitening and emission system of the present invention. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0040] like Figure 1-Figure 2 As shown, the waste heat steam de-whitening discharge system includes:

[0041] Equipment box 1, steam condensing heat exchanger 2, steam fan 4, mixing chamber 15, heat dissipation heat exchanger 3, air fan 5, steam air inlet 16, air inlet 17, exhaust port 18 and control system;

[0042] The two sides of the equipment box 1 are respectively provided with a steam inlet 16 and an air inlet 17, and the two sides can be the left and right sides; an exhaust port 18 is provided on one side of the equipment box 1 except the two sides, and the one side of the equipment box 1 except the two sides can be the top side; the steam inlet 16 is used to connect with the outlet of the waste heat steam, and the air inlet 17 is used to allow air to enter the equipment box 1;

[0043] Inside the equipment box 1, a steam condensation heat exchanger 2, a steam fan 4, a mixing chamber 15, a heat dissipation heat exchanger 3 and an air fan 5 are sequentially arranged along the direction from the steam inlet 16 to the air inlet 17, and the mixing chamber 15 is connected to the exhaust port 18; the waste heat steam to be processed inside the equipment box is processed and discharged in the order of the steam inlet, the steam condensation heat exchanger, the steam fan, the mixing chamber, and the exhaust port. The air entering the equipment box is processed and operated in the order of the air inlet, the air fan, the heat dissipation heat exchanger, the mixing chamber, and the exhaust port. The closed circulation flow order of the liquid heat transfer medium is the water pump, the front part of the pipeline one, the steam condensation heat exchanger, the pipeline two, the heat dissipation heat exchanger, the rear part of the pipeline one, and then to the water pump for circulation.

[0044] The control system is used to control and connect with the steam blower 4 and the air blower 5. The control system can be a single chip microcomputer. Waste heat or waste gas with a large amount of water vapor is collectively referred to as waste heat steam.

[0045] A water receiving pan 7 is arranged in the equipment box 1 and directly below the steam condensing heat exchanger 2 . A drainage port 6 communicating with the water receiving pan 7 is also provided on the equipment box 1 .

[0046] The steam condensing heat exchanger 2 includes a multi-channel metal tube 2-1 and a plurality of metal fins 2-2 tightly connected to the outer wall of the metal tube 2-1 through a tube expansion process; the number of the metal tube 2-1 can be several.

[0047] The heat dissipation heat exchanger 3 comprises a multi-channel metal tube 3-1 and a plurality of metal fins 3-2 tightly connected to the outer wall of the metal tube 3-1 by a tube expansion process. The number of the metal tube 3-1 can be several.

[0048] One end of the metal tube 1 2-1 is connected to one end of the metal tube 2 3-1 through the pipeline 1, and the other end of the metal tube 1 2-1 is connected to the other end of the metal tube 2 3-1 through the pipeline 2; the pipeline 1 and the pipeline 2 constitute a liquid transmission pipeline 11, and the liquid transmission pipeline 11 contains a liquid heat transfer medium. In this way, the metal tube 1 2-1 and the metal tube 2 3-1 are connected in series through the liquid transmission pipeline 11.

[0049] The structure in which one end of the metal tube 1 2-1 is connected to one end of the metal tube 2 3-1 through a pipeline is as follows:

[0050] One end of the metal tube 1 2-1 is connected to one end of the pipeline 1 through the water distributor 1 2-4, and the other end of the pipeline 1 is connected to one end of the metal tube 2 3-1 through the water collector 2 3-4;

[0051] The structure in which the other end of the metal tube 1 2-1 is connected to the other end of the metal tube 2 3-1 through the pipeline 2 is as follows:

[0052] The other end of the metal tube 1 2 - 1 is connected to one end of the pipeline 2 through the water collector 1 2 - 3 , and the other end of the pipeline 2 is connected to the other end of the metal tube 2 3 - 1 through the water distributor 2 3 - 3 .

[0053] The liquid heat transfer medium includes but is not limited to water, antifreeze or heat transfer oil.

[0054] The pipeline 1 is provided with a pressure relief safety valve 13 and an automatic exhaust valve 12;

[0055] The pipeline 2 is provided with a water pump 10 and an expansion tank 14 , and the control system is also used for controlling the connection with the water pump 10 .

[0056] The pipeline 1 is also connected to the pipeline 3 provided with a water supply valve 8.

[0057] The pipeline 2 is also connected to the pipeline 4 provided with the drain valve 9. The water supply valve 8, the drain valve 9, the pressure relief safety valve 13, the automatic exhaust valve 12, the water pump 10 and the expansion tank 14 can be arranged at any part of the liquid transmission pipeline 11.

[0058] The waste heat steam dewhitening and emission system of the present invention can utilize natural air with a relatively low temperature to absorb the heat in the waste heat steam with a relatively high temperature that needs to be discharged, so that the waste heat steam produces a cooling, condensing and dehumidifying effect, and utilizes the heat in the waste heat steam to heat the air. After the heated air is mixed with the steam after condensation and dehumidification, a mixed emission gas that is not easy to condense at the outdoor air ambient temperature is formed, thereby achieving a dewhitening effect during emission. This method can achieve the effect of eliminating white mist emissions at a low operating cost, which is of great significance to environmental protection. The waste heat steam dewhitening and emission system of the present invention has a simple structure and is light in weight, has a low cost, and does not require a large amount of energy to be consumed during the treatment process, which can effectively implement projects for rectification and treatment of waste heat or exhaust gas with a large amount of water vapor.

[0059] A de-whitening and discharging method of a waste heat steam de-whitening and discharging system, comprising:

[0060] Step 1: The control system controls the water pump 10, the steam fan 4 and the air fan 5 to operate, and the waste heat steam enters the equipment box 1 through the steam inlet;

[0061] Step 2: When the waste heat steam passes through the gap between the metal fins 2-2 of the steam condensation heat exchanger 2, the heat is transferred to the metal fins 2-2, and the metal fins 2-2 transfer the heat to the metal pipe 2-1 closely connected thereto, and then the heat is transferred to the liquid heat transfer medium flowing in the pipe driven by the water pump 10 through the pipe wall of the metal pipe 2-1;

[0062] Step 3: At this time, the waste heat steam temperature drops and condenses to form condensed water, which flows to the water receiving tray 7 and is discharged from the drain port 6, thereby achieving cooling, condensation and dehumidification of the waste heat steam;

[0063] Step 4: The waste heat steam after cooling, condensing and dehumidification is pressurized by a steam blower and enters the mixing chamber 15;

[0064] Step 5: The liquid heat transfer medium flowing in the metal tube 1 2-1 that absorbs heat in the steam condensing heat exchanger 2 flows to the metal tube 2 3-1 of the heat dissipation heat exchanger 3 through the power provided by the water pump 10, and its heat is transferred to the metal fin 2 3-2 through the tube wall of the metal tube 2 3-1, and then transferred to the outdoor air that enters through the air inlet 17 and flows through the heat dissipation heat exchanger after being pressurized by the air fan 5 through the metal fin 2 3-2, so that its temperature is increased;

[0065] Step 6: The heated outdoor air enters the mixing chamber 15 and mixes with the waste heat steam that has been cooled, condensed and dehumidified and entered the mixing chamber. After being discharged through the exhaust port 18, it enters the outdoor ambient air as a relatively low humidity gas that is not prone to condensation, thereby achieving the purpose of whitening discharge.

[0066] When the liquid heat transfer medium needs to be supplemented, the pipeline 3 can be connected to the liquid heat transfer medium source, and the liquid heat transfer medium can be supplemented to the liquid delivery pipeline 11 by opening the water replenishment valve 8;

[0067] When it is necessary to discharge the liquid heat transfer medium, the liquid heat transfer medium is discharged through the pipeline 4 by opening the drain valve 9; this can prevent the liquid heat transfer medium retained in the liquid transmission pipeline 11 from freezing and cracking and damaging the liquid transmission pipeline 11 when the temperature drops in winter.

[0068] The automatic exhaust valve 12 can timely remove the air in the liquid heat transfer medium to ensure the purity of the liquid heat transfer medium;

[0069] The pressure relief safety valve 13 and the expansion tank 14 can reduce the pressure of the liquid heat transfer medium in the liquid delivery pipeline 11 in time when the pressure is too high, thereby protecting the liquid delivery pipeline 11.

[0070] The heat exchange technology approach of the present invention is gas-liquid-gas, which has high heat exchange efficiency, large heat exchange capacity, small equipment size and light weight, while the heat exchange technology approach of the prior art is gas-gas, which has poor heat exchange efficiency, heavy equipment, large size and weak heat exchange capacity.

[0071] The present invention has been described above in the manner of illustration of embodiments. It is obvious to those skilled in the art that the present disclosure is not limited to the embodiments described above, and various changes, modifications and substitutions can be made without departing from the scope of the present invention.

Claims

1. A waste heat steam de-whitening discharge system, characterized in that: include: Equipment box, steam condensing heat exchanger, steam fan, mixing chamber, heat dissipation heat exchanger, air fan, steam inlet, air inlet, exhaust port and control system; The two sides of the equipment box are respectively provided with a steam inlet and an air inlet; an exhaust port is provided on one side of the equipment box except the two sides; the steam inlet is used to connect with the outlet of the waste heat steam, and the air inlet is used to allow air to enter the equipment box; A steam condensing heat exchanger, a steam fan, a mixing chamber, a heat dissipating heat exchanger and an air fan are sequentially arranged inside the equipment box along the direction from the steam inlet to the air inlet, and the mixing chamber is connected to the exhaust port; The control system is used to control and connect with the steam fan and the air fan; The closed circulation flow sequence of the liquid heat transfer medium is water pump, the front part of pipeline one, steam condensation heat exchanger, pipeline two, heat dissipation heat exchanger, the rear part of pipeline one, and then to water pump for circulation operation.

2. The waste heat steam de-whitening discharge system according to claim 1, characterized in that: A water receiving pan is arranged in the equipment box and directly below the steam condensing heat exchanger, and a drainage port connected to the water receiving pan is also provided on the equipment box.

3. The waste heat steam de-whitening discharge system according to claim 1, characterized in that: The steam condensing heat exchanger comprises a multi-channel metal tube and a plurality of metal fins tightly connected to the outer wall of the metal tube; The heat dissipation heat exchanger comprises two multi-channel metal tubes and a plurality of metal fins two tightly connected to the outer wall of the two metal tubes.

4. The waste heat steam de-whitening discharge system according to claim 3, characterized in that: One end of the metal tube 1 is connected to one end of the metal tube 2 through a pipeline, and the other end of the metal tube 1 is connected to the other end of the metal tube 2 through a pipeline; the pipeline 1 and the pipeline 2 constitute a liquid transmission pipeline, and the liquid transmission pipeline contains a liquid heat transfer medium; The structure in which one end of the metal tube 1 is connected to one end of the metal tube 2 through a pipeline is as follows: One end of the metal tube 1 is connected to one end of the pipeline 1 through the water distributor 1, and the other end of the pipeline 1 is connected to one end of the metal tube 2 through the water collector 2; The structure in which the other end of the metal tube 1 is connected to the other end of the metal tube 2 through the pipeline 2 is: The other end of the metal tube 1 is connected to one end of the pipeline 2 through the water collector 1, and the other end of the pipeline 2 is connected to the other end of the metal tube 2 through the water distributor 2.

5. The waste heat steam de-whitening discharge system according to claim 4, characterized in that: The liquid heat transfer medium includes but is not limited to water, antifreeze or heat transfer oil.

6. The waste heat steam de-whitening discharge system according to claim 4, characterized in that: The pipeline is provided with a pressure relief safety valve and an automatic exhaust valve; The pipeline 2 is provided with a water pump and an expansion tank, and the control system is also used for controlling the connection with the water pump.

7. The waste heat steam de-whitening discharge system according to claim 4, characterized in that: The pipeline 1 is also connected to the pipeline 3 provided with a water supply valve; The pipeline 2 is also connected to the pipeline 4 provided with a drain valve.

8. A decolorization and discharge method for a waste heat steam decolorization and discharge system, which is used for the waste heat steam decolorization and discharge system as claimed in claim 3, characterized in that: include: Step 1: The control system controls the operation of the water pump, steam fan and air fan, and the waste heat steam enters the equipment box through the steam inlet; Step 2: When the waste heat steam passes through the gap between the metal fins 1 of the steam condensation heat exchanger, the heat is transferred to the metal fins 1, and the metal fins 1 transfer the heat to the metal tube 1, and then the heat is transferred to the liquid heat transfer medium flowing in the tube driven by the water pump through the tube wall of the metal tube 1; Step 3: At this time, the waste heat steam temperature drops and condenses to form condensed water, which flows into the water receiving tray and is discharged from the drain port, thereby achieving cooling, condensation and dehumidification of the waste heat steam; Step 4: The waste heat steam after cooling, condensing and dehumidification is pressurized by the steam fan and enters the mixing chamber; Step 5: The liquid heat transfer medium flowing in the metal tube 1 that absorbs heat in the steam condensing heat exchanger flows to the metal tube 2 of the heat dissipation heat exchanger through the power provided by the water pump, and transfers its heat to the metal fin 2 through the tube wall of the metal tube 2, and then transfers it to the outdoor air that enters through the air inlet and flows through the heat dissipation heat exchanger after being pressurized by the air fan through the metal fin 2, thereby increasing its temperature; Step 6: The heated outdoor air enters the mixing chamber and mixes with the waste heat steam that has been cooled, condensed and dehumidified in the mixing chamber. After being discharged through the exhaust port, it enters the outdoor ambient air as a relatively low humidity gas that is not prone to condensation, thereby achieving the purpose of whitening discharge.

9. The deoxidation and discharge method of the waste heat steam deoxidation and discharge system according to claim 8, characterized in that: The pipeline 1 is also connected to the pipeline 3 provided with a water supply valve; The pipeline 2 is also connected to the pipeline 4 provided with a drain valve; The pipeline is provided with a pressure relief safety valve and an automatic exhaust valve; The second pipeline is provided with a water pump and an expansion tank, and the control system is also used to control the connection with the water pump; When the liquid heat transfer medium needs to be supplemented, the pipeline 3 can be connected to the liquid heat transfer medium source and the liquid heat transfer medium can be supplemented to the liquid transmission pipeline by opening the water supply valve; When the liquid heat transfer medium needs to be discharged, the liquid heat transfer medium is discharged through the pipeline 4 by opening the drain valve; The automatic exhaust valve can timely remove the air in the liquid heat transfer medium; The pressure relief safety valve and the expansion tank can reduce the pressure of the liquid heat transfer medium in time when the pressure in the liquid transmission pipeline is too high.

Images