Steam autoclave and boiler heat recovery system

Abstract

The present application relates to the field of environmental protection and energy saving technology, provide a kind of steam autoclave and boiler heat recovery system.The system includes steam autoclave and the steam autoclave provides steam boiler, also includes gas-water heat exchanger and water-water heat exchanger, the gas-water heat exchanger includes the gas flow path for heat exchange cooling and the water flow path one for heat exchange heating, the water-water heat exchanger includes the water flow path two for heat exchange cooling and the water flow path three for heat exchange heating;Steam autoclave exhaust steam and the steam generated by boiler surface blowdown with primary side inlet pipe a communication, secondary side inlet pipe a with boiler feed water communication, secondary side outlet pipe a with boiler communication;Steam autoclave exhaust condensate and the high-temperature hot water generated by boiler bottom blowdown with primary side inlet pipe b communication, secondary side inlet pipe b with boiler feed water communication, secondary side outlet pipe b with boiler communication.The energy consumption cost in the application process of steam autoclave is reduced, and the role of efficient energy saving and emission reduction is played.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of environmental protection and energy saving, and particularly relates to a steam autoclave and a boiler heat energy recovery system. BACKGROUND

[0002] The steam autoclave is a large pressure vessel with large volume and heavy weight. The steam autoclave is widely used, and is applied to steam pressure curing of building materials such as aerated concrete block, concrete pipe pile, sand-lime brick, and fly ash brick, so that the steam autoclave completes the hydrothermal reaction of Cao-SiO2-H2O. In the application process, the steam autoclave has high energy consumption, and it is difficult to recover the residual heat energy. The steam autoclave usually discharges high-pressure steam and high-temperature condensed water in an atmospheric direct discharge manner. The existing industry recovers the residual heat of the steam autoclave by using a large water tank, but the efficiency is low, the recovery amount is very small, and the whole industry is in a rough management stage with very low energy recovery utilization rate. SUMMARY

[0003] The purpose of the present application is to provide a steam autoclave and a boiler heat energy recovery system, which can recover and utilize the residual heat energy of the steam autoclave to the maximum extent in the application process.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme: a steam autoclave and a boiler heat energy recovery system, which comprises a steam autoclave and a boiler for providing steam for the steam autoclave, further comprises a gas-water heat exchanger and a water-water heat exchanger, the gas-water heat exchanger comprises a gas flow passage and a water flow passage one which exchange heat with each other, the water-water heat exchanger comprises a water flow passage two and a water flow passage three which exchange heat with each other, the inlet and outlet of the gas flow passage correspond to a primary side inlet pipe a and a primary side outlet pipe a, the inlet and outlet of the water flow passage one correspond to a secondary side inlet pipe a and a secondary side outlet pipe a, the inlet and outlet of the water flow passage two correspond to a primary side inlet pipe b and a primary side outlet pipe b, the inlet and outlet of the water flow passage three correspond to a secondary side inlet pipe b and a secondary side outlet pipe b; the residual steam discharged from the steam autoclave and the steam generated by the boiler surface blowdown are communicated with the primary side inlet pipe a, the secondary side inlet pipe a is communicated with the boiler feed water, and the secondary side outlet pipe a is communicated with the boiler; the condensed water discharged from the steam autoclave and the high-temperature hot water generated by the boiler bottom blowdown are communicated with the primary side inlet pipe b, the secondary side inlet pipe b is communicated with the boiler feed water, and the secondary side outlet pipe b is communicated with the boiler.

[0005] Optionally, the primary side outlet pipe a is communicated with the primary side inlet pipe b, the secondary side outlet pipe a is further communicated with the secondary side inlet pipe b, and the secondary side outlet pipe b is further communicated with the secondary side inlet pipe a.

[0006] Optionally, it further comprises a condensation buffer tank connected with the steam autoclave, the condensation buffer tank is used for collecting the condensed water discharged from the steam autoclave, and the condensation buffer tank is communicated with the primary side inlet pipe b.

[0007] Optionally, a hot water storage tank connected with the boiler is further included, and the secondary side outlet pipe a and the secondary side outlet pipe b are communicated with the hot water storage tank.

[0008] Optionally, a steam collection chamber connected with the primary side inlet pipe a is further included, and the steam discharged from the autoclave and the steam generated by the boiler surface blowdown are communicated with the steam collection chamber.

[0009] Optionally, a sewage filtration chamber connected with the primary side inlet pipe b is further included, and the condensate water discharged from the autoclave and the high-temperature hot water generated by the boiler bottom blowdown are communicated with the sewage filtration chamber.

[0010] Optionally, a wastewater treatment tank is further included, and the primary side outlet pipe b is connected with the wastewater treatment tank.

[0011] Optionally, a clean water tank connected with the wastewater treatment tank is further included, and the clean water tank is communicated with the secondary side inlet pipe a, the secondary side inlet pipe b or the boiler.

[0012] Optionally, a primary steam distributor arranged between the autoclave and the boiler is further included, and the autoclave is arranged in plurality, and the primary steam distributor is provided with a plurality of distribution valves corresponding to the air inlets of the plurality of autoclaves.

[0013] Optionally, a secondary steam distribution chamber arranged between the exhaust port and the air inlet of the autoclave is further included, and the secondary steam distribution chamber is provided with a plurality of distribution valves corresponding to the air inlets of the plurality of autoclaves.

[0014] Compared with the prior art, the application adopts a gas-water heat exchanger to recover the heat energy of the residual steam discharged from the autoclave and the steam generated by the boiler surface blowdown, the low-temperature boiler feed water flows into the secondary side inlet pipe a, is heated and warmed up by the gas-water heat exchanger, and then flows out from the secondary side outlet pipe a to provide preheated water for the boiler; a water-water heat exchanger is adopted to recover the heat energy of the condensate water discharged from the autoclave and the high-temperature hot water generated by the boiler bottom blowdown, the low-temperature boiler feed water flows into the secondary side inlet pipe b, is heated and warmed up by the water-water heat exchanger, and then flows out from the secondary side outlet pipe b to provide preheated water for the boiler; in summary, the above-mentioned system of the application can recover the heat energy of the high-temperature gas and the high-temperature liquid generated by the autoclave and the boiler through the gas-water heat exchanger and the water-water heat exchanger, the recovery and utilization rate of the waste heat is as high as 90%, the energy consumption cost in the application process of the autoclave is greatly reduced, and the effect of high-efficiency energy saving and emission reduction is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The arrangement diagram of the application.

[0016] Reference signs:

[0017] 1, autoclave; 2, boiler; 3, gas-water heat exchanger; 31, primary side inlet pipe a; 32, primary side outlet pipe a; 33, secondary side inlet pipe a; 34, secondary side outlet pipe a; 4, water-water heat exchanger; 41, primary side inlet pipe b; 42, primary side outlet pipe b; 43, secondary side inlet pipe b; 44, secondary side outlet pipe b; 5, condensate buffer tank; 6, hot water storage tank; 7, steam collection chamber; 8, sewage filtration chamber; 9, wastewater treatment tank; 10, clean water tank; 11, primary steam distributor; 12, secondary steam distribution chamber. DETAILED DESCRIPTION

[0018] In order to enable a clearer understanding of the above-mentioned objects, features and advantages of the present application, the present application will be further described below with reference to the drawings and embodiments. It should be understood that the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The specific embodiments described herein are merely intended to explain the present application, rather than limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present application fall within the scope of protection of the present application.

[0019] As shown in Figure 1 The present application provides a steam autoclave and boiler heat energy recovery system, which comprises a steam autoclave 1 and a boiler 2 for providing steam for the steam autoclave 1, and further comprises a gas-water heat exchanger 3 and a water-water heat exchanger 4. The gas-water heat exchanger 3 comprises a gas flow passage for heat exchange and cooling and a water flow passage one for heat exchange and heating. The water-water heat exchanger 4 comprises a water flow passage two for heat exchange and cooling and a water flow passage three for heat exchange and heating. The gas-water heat exchanger 3 comprises a primary side inlet pipe a 31 and a primary side outlet pipe a 32 for high-temperature gas flow in and out, and a secondary side inlet pipe a 33 and a secondary side outlet pipe a 34 for low-temperature boiler feed water flow in and out. The water-water heat exchanger 4 comprises a primary side inlet pipe b 41 and a primary side outlet pipe b 42 for high-temperature liquid flow in and out, and a secondary side inlet pipe b 43 and a secondary side outlet pipe b 44 for low-temperature boiler feed water flow in and out. The remaining steam discharged from the steam autoclave 1 and the steam generated by surface blowdown of the boiler 2 are communicated with the primary side inlet pipe a 31. The condensate water discharged from the steam autoclave 1 and the high-temperature hot water generated by bottom blowdown of the boiler 2 are communicated with the primary side inlet pipe b 41.

[0020] Compared with the prior art, the application adopts the gas-water heat exchanger 3 to recover heat energy of the remaining steam discharged from the autoclave 1 and the steam generated by surface blowdown of the boiler 2, the low-temperature boiler feed water flows into the secondary side inlet pipe a33, is heated and raised in temperature by the gas-water heat exchanger 3, and then flows out of the secondary side outlet pipe a34 to provide preheated water for the boiler 2; the water-water heat exchanger 4 is adopted to recover heat energy of the condensed water discharged from the autoclave 1 and the high-temperature hot water generated by bottom blowdown of the boiler 2, the low-temperature boiler feed water flows into the secondary side inlet pipe b43, is heated and raised in temperature by the water-water heat exchanger 4, and then flows out of the secondary side outlet pipe b44 to provide preheated water for the boiler 2; in general, the above system of the application can recover heat energy of the high-temperature gas and the high-temperature liquid generated by the autoclave 1 and the boiler 2 through the gas-water heat exchanger 3 and the water-water heat exchanger 4, the recovery rate of waste heat is as high as 90%, the energy consumption cost in the application process of the autoclave 1 is greatly reduced, and the effect of high-efficiency energy saving and emission reduction is achieved.

[0021] In some embodiments, the primary side outlet pipe a32 is in communication with the primary side inlet pipe b41, the remaining steam discharged from the autoclave 1 and the steam generated by surface blowdown of the boiler 2 is cooled and lowered in temperature by the gas-water heat exchanger 3, and then the steam is condensed into high-temperature water, which can be introduced into the water-water heat exchanger 4 again for further heat exchange and temperature reduction; the secondary side outlet pipe a34 is also in communication with the secondary side inlet pipe b43, the boiler feed water heated and raised in temperature by the gas-water heat exchanger 3 can also be further heated and raised in temperature by the water-water heat exchanger 4, the secondary side outlet pipe b44 is also in communication with the secondary side inlet pipe a33, if the temperature of the boiler feed water heated and raised in temperature by the water-water heat exchanger 4 is still relatively low, real-time temperature monitoring can be performed by the temperature monitor, so that the boiler feed water can be returned to the gas-water heat exchanger 3 and the water-water heat exchanger 4 again for further heat exchange and temperature raising, and finally the boiler feed water with a relatively high temperature is obtained and supplied to the boiler 2.

[0022] In some embodiments, the condensation buffer tank 5 connected with the autoclave 1 is further included, the condensation buffer tank 5 is used to collect the condensed water discharged from the autoclave 1, and the condensation buffer tank 5 is in communication with the primary side inlet pipe b41. The condensation buffer tank 5 is used to collect the condensed water generated by the autoclave 1, and then the condensed water is delivered to the water-water heat exchanger 4 for heat exchange.

[0023] In some embodiments, the hot water storage tank 6 connected with the boiler 2 is further included, the secondary side outlet pipe a34 and the secondary side outlet pipe b44 are in communication with the hot water storage tank 6. The boiler feed water heated and raised in temperature by the gas-water heat exchanger 3 and the water-water heat exchanger 4 can be temporarily stored in the hot water storage tank 6, the hot water storage tank 6 can supply water to the boiler 2, and can also supply water to other facilities or processes in the production workshop that need water.

[0024] In some embodiments, a steam collection chamber 7 is further connected with the primary side inlet pipe a31, the remaining steam discharged from the autoclave 1 and the steam generated by the surface blowdown of the boiler 2 is communicated with the steam collection chamber 7, and clean materials such as activated carbon can be arranged in the steam collection chamber 7 to filter the gas to a certain extent, so as to avoid the pollution of the gas-water heat exchanger 3 and the water-water heat exchanger 4 by the direct flow of the dirt.

[0025] In some embodiments, a sewage filtration chamber 8 is further connected with the primary side inlet pipe b41, the condensed water discharged from the autoclave 1 and the high-temperature hot water generated by the bottom blowdown of the boiler 2 is communicated with the sewage filtration chamber 8, and clean materials such as activated carbon can be arranged in the sewage filtration chamber 8 to filter the liquid to a certain extent, so as to avoid the pollution of the water-water heat exchanger 4 by the direct flow of the dirt.

[0026] In some embodiments, a wastewater treatment tank 9 is further included, the primary side outlet pipe b42 is connected with the wastewater treatment tank 9, and the wastewater cooled by the heat exchange of the gas-water heat exchanger 3 and the water-water heat exchanger 4 is discharged into the wastewater treatment tank 9 for final cleaning treatment, so as to avoid the pollution of the environment by the direct discharge of the wastewater.

[0027] In some embodiments, a clean water tank 10 connected with the wastewater treatment tank 9 is further included, the clean water tank 10 is communicated with the secondary side inlet pipe a33, the secondary side inlet pipe b43 or the boiler 2, the clean water obtained by the treatment of the wastewater treatment tank 9 is stored in the clean water tank 10, which can be used as the boiler feed water source, so as to effectively recycle the water in the whole system and avoid the waste of water resources.

[0028] In some embodiments, a first steam distributor 11 is arranged between the autoclave 1 and the boiler 2, the autoclave 1 is arranged in plurality, and the first steam distributor 11 is provided with a plurality of distribution valves corresponding to the gas inlets of the plurality of autoclaves 1. The autoclave 1 is arranged in plurality for work, in order to facilitate the regulation and control of the utilization of steam, the first steam distributor 11 is used for transfer, and the autoclave 1 is provided with steam corresponding to the opening of the distribution valve and the size of the valve.

[0029] In some embodiments, a second steam distribution chamber 12 is arranged between the exhaust port and the gas inlet of the autoclave 1, the second steam distribution chamber 12 is provided with a plurality of distribution valves corresponding to the gas inlets of the plurality of autoclaves 1. The steam discharged from the exhaust port of the autoclave 1 can be heat-exchanged by the gas-water heat exchanger 3, or can be collected by the second steam distribution chamber 12, and then is redistributed to each autoclave 1 for secondary utilization. How to utilize the discharged steam can be selected according to the actual working condition.

[0030] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A steam autoclave and boiler heat recovery system comprising a steam autoclave (1) and a boiler (2) for providing steam to the steam autoclave (1), characterised in that: It also includes a gas-water heat exchanger (3) and a water-water heat exchanger (4), the gas-water heat exchanger (3) includes a gas flow path and a water flow path one which exchange heat with each other, the water-water heat exchanger (4) includes a water flow path two and a water flow path three which exchange heat with each other, the inlet and outlet of the gas flow path correspond to the primary side inlet pipe a (31) and the primary side outlet pipe a (32), the inlet and outlet of the water flow path one correspond to the secondary side inlet pipe a (33) and the secondary side outlet pipe a (34), the inlet and outlet of the water flow path two correspond to the primary side inlet pipe b (41) and the primary side outlet pipe b (42), the inlet and outlet of the water flow path three correspond to the secondary side inlet pipe b (43) and the secondary side outlet pipe b (44); The remaining steam discharged from the steam autoclave (1) and the steam generated by the surface pollution of the boiler (2) are communicated with the primary side inlet pipe a (31), the secondary side inlet pipe a (33) is communicated with the boiler feed water, and the secondary side outlet pipe a (34) is communicated with the boiler (2); The condensed water discharged from the steam autoclave (1) and the high-temperature hot water generated by the bottom pollution of the boiler (2) are communicated with the primary side inlet pipe b (41), the secondary side inlet pipe b (43) is communicated with the boiler feed water, and the secondary side outlet pipe b (44) is communicated with the boiler (2); If the temperature of the boiler feed water after heat exchange and temperature rise in the water-water heat exchanger (4) is still relatively low, real-time temperature monitoring can be performed through the temperature monitor, so that it returns to the gas-water heat exchanger (3) and the water-water heat exchanger (4) for heat exchange and temperature rise again; The primary side outlet pipe a (32) is communicated with the primary side inlet pipe b (41), the secondary side outlet pipe a (34) is also communicated with the secondary side inlet pipe b (43), and the secondary side outlet pipe b (44) is also communicated with the secondary side inlet pipe a (33); The gas-water heat exchanger (3) is used to recover the heat energy of the remaining steam discharged from the steam autoclave (1) and the steam generated by the surface pollution of the boiler (2), and the low-temperature boiler feed water flows into the secondary side inlet pipe a (33) and is heated and raised in temperature by the gas-water heat exchanger (3), and then flows out from the secondary side outlet pipe a (34) to provide preheated water for the boiler (2); the water-water heat exchanger (4) is used to recover the heat energy of the condensed water discharged from the steam autoclave (1) and the high-temperature hot water generated by the bottom pollution of the boiler (2), and the low-temperature boiler feed water flows into the secondary side inlet pipe b (43) and is heated and raised in temperature by the water-water heat exchanger (4), and then flows out from the secondary side outlet pipe b (44) to provide preheated water for the boiler (2); It also includes a condensation buffer tank (5) connected with the steam autoclave (1), which is used to collect the condensed water discharged from the steam autoclave (1), and the condensation buffer tank (5) is communicated with the primary side inlet pipe b (41); It also includes a hot water storage tank (6) connected with the boiler (2), and the secondary side outlet pipe a (34) and the secondary side outlet pipe b (44) are communicated with the hot water storage tank (6); Further comprising a steam collection chamber (7) connected with the primary side inlet pipe a (31), the steam discharged from the autoclave (1) and the steam generated from the surface blowdown of the boiler (2) are communicated with the steam collection chamber (7); Further comprising a sewage filter chamber (8) connected with the primary side inlet pipe b (41), the condensed water discharged from the autoclave (1) and the high-temperature hot water generated from the bottom blowdown of the boiler (2) are communicated with the sewage filter chamber (8); Further comprising a wastewater treatment tank (9), the primary side outlet pipe b (42) is connected with the wastewater treatment tank (9); Further comprising a clean water tank (10) connected with the wastewater treatment tank (9), the clean water tank (10) is communicated with the secondary side inlet pipe a (33), the secondary side inlet pipe b (43) or the boiler (2); Further comprising a primary steam distributor (11) arranged between the autoclave (1) and the boiler (2), the autoclave (1) is arranged in plurality, the primary steam distributor (11) is provided with multiple distribution valves corresponding to the air inlets of the plurality of autoclaves (1); Further comprising a secondary steam distribution chamber (12) arranged between the air outlet and the air inlet of the autoclave (1), the secondary steam distribution chamber (12) is provided with multiple distribution valves corresponding to the air inlets of the plurality of autoclaves (1).

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