CN205537195U - Straight touch heat exchange device - Google Patents

Abstract

The utility model relates to a straight touch heat exchange device, its structure includes preheating device and heating device, preheating device includes heat pipe, flue gas case and sets up the preheating water tank in flue gas case top that the heat absorption section setting of heat pipe sets up in preheating water tank at flue gas incasement, the heat radiating section of heat pipe, be equipped with flue gas inlet in the one end of flue gas case, be equipped with the fume emission mouth at the top of the other end of flue gas case, preheating water tank's one end is equipped with the water inlet, and preheating water tank's the other end is equipped with the delivery port, heating device includes heating the water tank and sets up the inside steam contactor at heating the water tank that heating the water tank's water inlet is linked together with preheating water tank's delivery port, is equipped with circulating water pump interface and condensate pump interface in heating the water tank's bottom, is equipped with thermodetector and heating the water tank 0 ware on heating the water tank, be equipped with steam inlet at the top of steam contactor, seted up the fumarole in the lower part of steam contactor. The utility model discloses improved the heat utilization efficiency greatly, made energy loss reduce by a wide margin.

Description

Direct contact heat exchange device

technical field

The utility model relates to an energy-saving heat exchange device, in particular to a direct-contact heat exchange device.

Background technique

The heating system in winter generally adopts two methods, one is to directly pass steam into the radiator for heating, and the other is to exchange heat between steam and cold water through a steam-water heat exchanger, and pass the obtained hot water into the radiator heating. The former uses steam for direct heating, which has a higher heat utilization rate, but it is easy to cause indoor air to be dry. People who live in it for a long time will feel uncomfortable, easy to get angry, and cause respiratory diseases. Therefore, most of the existing heating systems adopt the second heating method. . However, since the latter uses hot water for heating after exchanging heat with steam and water, although the heating environment is good, it increases the number of heat exchanges, resulting in a significant increase in energy loss and low heat utilization.

Utility model content

The purpose of the utility model is to provide a direct-contact heat exchange device to solve the problems of low heat utilization rate and high energy loss in existing heating methods.

The utility model is achieved as follows: a direct-contact heat exchange device, including a preheating device and a heating device communicated through pipelines;

The preheating device includes a heat pipe, a flue gas box and a preheating water tank arranged above the flue gas box, the heat absorbing section of the heat pipe is arranged in the flue gas box, and the heat releasing section of the heat pipe is arranged in the In the preheating water tank; a flue gas inlet is provided at one end of the flue gas box, and a flue gas discharge port is provided at the top of the other end of the flue gas box; an inlet is provided at one end of the preheating water tank A water outlet, a water outlet is provided at the other end of the preheating water tank;

The heating device includes a heating water tank and a steam contactor arranged inside the heating water tank, the water inlet of the heating water tank is connected with the water outlet of the preheating water tank, and a circulating water pump is arranged at the bottom of the heating water tank interface and condensate pump interface, a temperature detector and a liquid level detector are provided on the heating water tank; a steam inlet is provided on the top of the steam contactor, and an air injection hole is opened at the bottom of the steam contactor.

An overflow port is provided on the upper box body of the heating water tank, and a sewage outlet is provided on the lower box body of the heating water tank.

An online dust cleaning device is provided at the bottom of the flue gas box.

The flue gas inlet of the flue gas box is connected with the high-temperature flue gas pipeline, the flue gas discharge port of the flue gas box is connected with the flue gas dust removal device, and the water inlet of the preheating water tank is connected with the return water pipeline of the heating system Pass.

The steam inlet of the steam contactor is connected with the high-temperature steam pipeline; the circulating water pump interface of the heating water tank is provided with a circulating water pump, and the circulating water pump is connected with the water inlet pipeline of the heating system through a pipeline; the condensed water pump interface of the heating water tank A condensed water pump is provided, and the condensed water pump is connected with the boiler deaerator through a pipeline.

When the utility model is used to heat the low-temperature return water of the heating system, the low-temperature return water first enters the preheating water tank, and at this time, the high-temperature flue gas is passed into the flue gas box, and the high-temperature flue gas transfers heat to the heat-absorbing section of the high-efficiency heat pipe. The heat is transferred to the low-temperature water in the preheating tank through the exothermic section of the heat pipe to preheat it. Then, the preheated low-temperature water enters the heating water tank. At this time, high-temperature steam from a steam boiler or industrial waste heat boiler is introduced into the steam inlet of the steam contactor, and the high-temperature steam is uniformly injected into the low-temperature water through the gas injection holes on the steam contactor. , gradually heat the water. The temperature detector monitors the water temperature in the heating water tank in real time. When the water temperature reaches the set value, the injection of high-temperature steam is stopped, and the circulating water pump is turned on at the same time to send the high-temperature water in the heating water tank into the water inlet pipe of the heating system. Due to the continuous introduction of high-temperature steam, the liquid level in the heating water tank gradually rises. The liquid level detector monitors the liquid level in the heating water tank in real time. Draw out from the heating tank.

The utility model makes full use of the heat carried by the high-temperature flue gas and high-temperature steam produced by the boiler, and adopts the heat transfer mode of direct contact between high-temperature steam and low-temperature water, which greatly improves the heat utilization rate (up to 98%) and causes a large energy loss Amplitude reduction, high efficiency and energy saving.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the use state of the utility model.

In the figure: 1. Heat pipe, 2. Flue gas tank, 3. Preheating water tank, 4. Heating water tank, 5. Steam contactor, 6. Circulating water pump interface, 7. Condensate water pump interface, 8. Temperature detector, 9. Liquid level detector, 10. Sewage outlet, 11. Online dust cleaning device, 12. Heating system, 13. Boiler deaerator, 14. Overflow port, 15. Controller.

detailed description

As shown in Fig. 1 and Fig. 2, the utility model mainly is made up of parts such as preheating device, heating device and controller 15.

The preheating device includes a heat pipe 1, a flue gas box 2 and a preheating water tank 3, wherein the preheating water tank 3 is arranged above the flue gas box 2, and the heat-absorbing section (lower half) of the heat pipe 1 is arranged in the flue gas box 2 , the heat release section (upper half) of the heat pipe 1 is set in the preheating water tank 3 . One end of the flue gas box 2 is provided with a flue gas inlet, and the flue gas inlet is connected with the high-temperature flue gas pipeline of the boiler, and the other end of the flue gas box 2 is provided with a flue gas outlet at the top, and the flue gas outlet is connected with the flue gas dust collector The device is connected. The high-temperature flue gas transfers heat to the heat-absorbing section of the heat pipe 1 through the flue gas box 2, and its own temperature decreases, and the cooled flue gas is discharged after dust removal. An online dust removal device 11 is provided at the bottom of the flue gas box 2 to remove dust inside in time to prevent dust accumulation from affecting heat transfer efficiency. The water inlet of the preheating water tank 3 is connected with the water outlet pipeline of the heating system 12 to receive the low-temperature water discharged from the heating system 12, and the heat release section of the heat pipe 1 transfers heat to the low-temperature water for preliminary preheating of the low-temperature water.

The heating device includes a heating water tank 4 and a steam contactor 5. The water inlet of the heating water tank 4 is connected with the water outlet of the smoke box 2 through a pipeline to receive the preheated low-temperature water from the smoke box 2; the steam contact The device 5 is arranged in the inside of the heating water tank 4, and a steam inlet connected with a high-temperature steam pipeline is arranged on the top of the steam contactor 5, and a gas volume regulating valve is arranged on the steam inlet pipeline, which is used to control the injection rate of the high-temperature steam; Jet holes are evenly distributed on the contactor 5. After the high-temperature steam from the boiler enters the steam contactor 5 through the steam inlet, it is evenly sprayed into the heating water tank 4 from the steam jet holes, fully mixed with the low-temperature water in the heating water tank 4, and the low-temperature The water is gradually heated.

The bottom of the heating water tank 4 is provided with a circulating water pump interface 6 and a condensed water pump interface 7, and a circulating water pump is provided at the circulating water pump interface 6, and the circulating water pump is connected with the water inlet pipeline of the heating system 12 through a pipeline; at the condensed water pump interface 7 A condensate pump is provided, and the condensate pump is connected to the boiler deaerator 13 through a pipeline (after the high-temperature steam is sprayed into the heating water tank, it exchanges heat with relatively low-temperature water in the tank, and condenses itself into water, so the liquid level in the tank will change with the The water that exceeds the set level is the condensed water of the high-temperature steam, and the pump used to pump out this part of the water is called a condensed water pump). The heating water tank 4 is provided with a temperature detector 8 and a liquid level detector 9 for measuring the temperature and liquid level of the water in the tank respectively. The temperature detector 8 and the liquid level detector 9 are all connected to the controller 15 .

The controller 15 is used to control the switches of the circulating water pump, the condensed water pump and the gas volume control valve. When the temperature measured by the temperature detector 8 is low, the controller 15 controls the opening degree of the gas volume control valve and adjusts the injection rate of high-temperature steam so that The low-temperature water in the heating water tank 4 heats up rapidly. When the temperature detector 8 detects that the temperature of the low-temperature water rises to the set temperature, the gas volume control valve is closed, and the circulating water pump is turned on under the control of the controller 15 to send the heated high-temperature water into the heating system 12 . When the liquid level measured by the liquid level detector 9 exceeds the set value, the condensed water pump is turned on under the control of the controller 15, and the excess water in the tank is discharged into the boiler deaerator 13.

The casing top of heating water tank 4 is also provided with overflow port 14, and when the water yield in the casing was too much, unnecessary water also can overflow from overflow port 14. The bottom of the heating water tank 4 is provided with a sewage outlet 10, which can regularly discharge the pollutants in the tank, so as to avoid the accumulation of pollutants and affect the heat exchange.

Claims (5)

1. a straight touch heat-exchange device, is characterized in that, including by the preheating device of pipeline communication and heater；

Described preheating device includes heat pipe, flue gas case and is arranged on the preheating water tank above described flue gas case, and the endotherm section of described heat pipe is arranged in described flue gas case, and the heat release section of described heat pipe is arranged in described preheating water tank；It is provided with gas approach in one end of described flue gas case, is provided with fume emission mouth at the top of the other end of described flue gas case；Being provided with water inlet in one end of described preheating water tank, the other end described preheating water tank is provided with outlet；

Described heater includes heating water tank and is arranged on the steam catalyst within described heating water tank, the water inlet of described heating water tank is connected with the outlet of described preheating water tank, it is provided with water circulating pump interface and condensate pump interface in the bottom of described heating water tank, described heating water tank is provided with temperature detector and liquid level detector；It is provided with steam inlet at the top of described steam catalyst, offers fumarole in the bottom of described steam catalyst.

Straight touch heat-exchange device the most according to claim 1, is characterized in that, be provided with overfall on the upper box body of described heating water tank, be provided with sewage draining exit on the lower part box of described heating water tank.

Straight touch heat-exchange device the most according to claim 1, is characterized in that, is provided with online ash removal device in the bottom of described flue gas case.

Straight touch heat-exchange device the most according to claim 1, it is characterized in that, the gas approach of described flue gas case is connected with high-temperature flue gas pipeline, and the fume emission mouth of described flue gas case is connected with fume dust remover, and the water inlet of described preheating water tank is connected with the water return pipeline of heating system.

Straight touch heat-exchange device the most according to claim 1, is characterized in that, the steam inlet of described steam catalyst is connected with high temperature steam pipeline；The water circulating pump interface of described heating water tank is provided with water circulating pump, and described water circulating pump is connected with the inlet channel of heating system by pipeline；The condensate pump interface of described heating water tank is provided with condensate pump, and described condensate pump is connected with boiler feed by pipeline.