CN202303334U - Energy-saving thermal deaerator - Google Patents

Abstract

The utility model discloses an energy-saving thermal deaerator, which is used for boiler feed water deaeration, belongs to the technical field of heat energy, and comprises a water storage tank and a deaeration head. The outlet and the first safety valve, the deaeration head is equipped with a feed water inlet, an exhaust valve and a second safety valve; it also includes a condenser with non-condensable gas discharge and overflow holes, exhaust steam inlet, Condensed water outlet, water inlet and water outlet; the water outlet of the condenser is connected to the feed water inlet of the deaeration head through the water outlet pipe; the condensed water outlet is connected to the condensed water inlet through the condensed water pipe; The softened water inlet pipeline is connected; the exhaust steam discharge valve outlet is connected to the exhaust steam inlet of the condenser through the connecting pipeline; the exhaust steam discharge valve outlet is also connected to the external discharge pipeline, and the condensed water outlet of the condenser is Above the condensate inlet of the storage tank. The utility model almost realizes zero discharge of water vapor and heat in the process of boiler feedwater thermal deoxygenation.

Description

An energy-saving thermal deaerator

technical field

The utility model belongs to the technical field of boiler thermal energy, in particular to an energy-saving thermal deaerator applied to thermal deaeration of boiler feed water.

Background technique

The existing thermal deaerator includes a deaerator head and a water storage tank. The water storage tank is provided with a heating steam inlet, an auxiliary heating steam inlet and a deaeration water outlet. The deaeration head is provided with a supply water inlet and a exhaust steam discharge valve. When in use, the make-up water is heated by the heated steam in the oxygen removal head, and as the temperature of the make-up water rises, the dissolved oxygen and other non-condensable gases escape from the water, together with the steam, in the form of exhausted steam, Drain together through the exhaust valve. Exhausted steam includes oxygen, other non-condensable gases and water vapor, of which water vapor accounts for the largest proportion. While discharging non-condensable gases such as oxygen, water vapor is also wasted in vain. Today, when energy is increasingly scarce, thermal deaerators can eliminate the waste of water vapor and heat while deoxidizing, which is an urgent problem to be solved by thermal deaerators.

Contents of the invention

The purpose of the utility model is to provide an energy-saving thermal deaerator with almost no waste of water vapor and heat.

In order to achieve the above object, the utility model adopts the following technical solutions:

An energy-saving thermal deaerator, comprising a water storage tank and a deaeration head, the water storage tank has a heating steam inlet, an auxiliary heating steam inlet, a deaeration water outlet and a first safety valve, and the deaeration head has a Make-up water inlet, exhaust steam discharge valve and second safety valve; characterized in that,

It also includes a condenser, on which non-condensable gases such as oxygen discharge and condensed water overflow holes, exhaust steam inlet, condensed water outlet, water inlet and water outlet are arranged on the said condenser; Inlet, a spray cup is installed at the inlet of the condensed water; the water outlet of the condenser is connected with the supply water inlet of the deaeration head through the water outlet pipeline, and a control valve is arranged on the water outlet pipeline; the condensate The water outlet is connected to the condensed water inlet through a condensed water pipeline, and a check valve and a first emergency valve are arranged on the condensed water pipeline; A control valve is provided on the incoming water pipeline of brine/softened water; the feed water inlet of the deaeration head is connected to the incoming water pipeline of desalted water/softened water through a bypass pipeline, and a bypass is provided on the bypass pipeline. valve; the outlet of the exhaust steam discharge valve is connected to the exhaust steam inlet of the condenser through a connecting pipeline, and a second emergency valve is arranged on the connecting pipeline; the outlet of the exhaust steam discharge valve is connected to the exhaust pipe The condensed water outlet of the condenser is located above the condensed water inlet of the water storage tank, and the condensed water outlet of the condenser is connected with the condensed water outlet of the water storage tank. The height difference of the condensate inlet is greater than or equal to 2 meters.

The tube bundles in the condenser are placed horizontally, the baffles of the condenser are single-bow vertical baffles, and a liquid opening is opened at the bottom.

The liquid opening is a fan-shaped hole with a radian of 90 degrees.

There are several spray holes on the spray cup.

The height difference between the condensed water outlet of the condenser and the condensed water inlet of the water storage tank is 2 meters.

The height difference between the condensed water outlet of the condenser and the condensed water inlet of the water storage tank is 3 meters.

The height difference between the condensed water outlet of the condenser and the condensed water inlet of the water storage tank is 5 meters.

The beneficial effects of the technical solution provided by the utility model are: the energy-saving thermal deaerator of the utility model uses the demineralized water/softened water and the condenser to cool the water vapor in the exhaust steam discharged from the deoxygenation head to form condensed water, and the condensed water relies on The pressure generated by its own water column enters the water storage tank in a thin line through the spray cup; at the same time, the demineralized water/softened water also absorbs heat and heats up, preheating in advance provides favorable conditions for rapid temperature rise and deoxygenation in the deaeration head. Therefore, the energy-saving thermal deaerator of the utility model not only does not discharge steam, but also the temperature of the discharged non-condensable gas such as oxygen is also close to the inlet water temperature of the condenser, almost realizing zero discharge of water vapor and heat in exhaust steam .

Description of drawings

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

Fig. 2 is the baffle structure schematic diagram of condenser in the utility model;

Fig. 3 is a structural schematic diagram of the spray cup in the utility model.

Reference signs: 1-water storage tank; 2-deoxygenation head; 3-first safety valve; 4-heating steam inlet; 5-exhaust steam discharge valve; 6-exhaust valve; Condenser; 9 - Oxygen and other non-condensable gas discharge and condensed water overflow hole; 10 - exhaust steam inlet; 11 - condensed water outlet; 12 - water inlet; 13 - water outlet; 14 - bypass valve; 15 - supply Water inlet; 16-check valve; 17-spray cup; 18-deoxygenated water outlet; 19-liquid opening; 20-spray hole; 21-second safety valve; 22-water outlet pipe; 23-condensate water pipe ;24-demineralized water/softened water inlet pipeline; 25-bypass pipeline; 26-connecting pipeline; 27-second emergency valve; 28-exhaust pipeline; 29-baffle plate; ; 31 - Auxiliary heating steam inlet.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

An energy-saving thermal deaerator, as shown in Fig. 1, Fig. 2 and Fig. 3, comprises a water storage tank 1 and a deaerator head 2, said water storage tank 1 has a heating steam inlet 4, an auxiliary heating steam inlet 31, a deaerator Oxygen water outlet 18 and the first safety valve 3, on the described deoxygenation head 2 there is the feed water inlet 15, exhaust gas discharge valve 5 and the second safety valve 21; it is characterized in that,

It also includes a condenser 8, on which non-condensable gases such as oxygen are discharged and condensed water overflow hole 9, exhaust steam inlet 10, condensed water outlet 11, water inlet 12 and water outlet 13 are arranged on the said condenser 8; The water storage tank 1 is provided with a condensed water inlet 30, and a spray cup 17 is installed at the condensed water inlet 30; the water outlet 13 of the condenser is connected with the supply water inlet 15 of the deaeration head through the water outlet pipeline 22 , the outlet pipeline 22 is provided with a control valve; the condensed water outlet 11 is connected to the condensed water inlet 30 through the condensed water pipeline 23, and the condensed water pipeline 23 is provided with a check valve 16 and a first The emergency valve 7 and the function of the check valve 16 are to prevent the steam in the water storage tank from entering the condenser; the water inlet 12 is connected to the demineralized water/softened water incoming pipeline 24, and the demineralized water/softened water incoming pipeline 24 There is a control valve on it; the feed water inlet 15 of the oxygen removal head is connected to the desalted water/softened water inlet pipeline 24 through a bypass pipeline 25, and a bypass valve is provided on the bypass pipeline 25 14; the outlet of the exhaust steam discharge valve 5 is connected to the exhaust steam inlet 10 of the condenser through the connecting pipeline 26, and the second accident valve 27 is arranged on the connecting pipeline 26; the exhaust steam discharge valve 5 is connected to the evacuation pipeline 28, the evacuation pipeline 28 is provided with an evacuation valve 6, and the condensed water outlet 11 of the condenser is located above the condensed water inlet 30 of the water storage tank. The height difference between the condensed water outlet 11 of the condenser and the condensed water inlet 30 of the water storage tank is greater than or equal to 2 meters, so that the pressure generated by the condensed water column itself is greater than the internal steam pressure of the water storage tank, without any external power. The condensed water itself generates pressure, and the condensed water can be pumped into the water storage tank. Oxygen and other non-condensable gas discharge and condensed water overflow hole 9 can be used for exhausting, and can also be used for draining water when there is a lot of condensed water to avoid affecting the deoxygenating effect of the deoxygenating head due to the full water of the condenser.

When in use, the desalted water/softened water enters the deaerator head of the deaerator after passing through the condenser, and then heats steam into the water storage tank to perform thermal deaeration of the incoming water. After stabilization, close the exhaust valve and open the second emergency valve to allow exhaust steam to enter the condenser. The exhaust steam is condensed by the desalinated water/softened water in the condenser to release heat; at the same time, the desalted water/softened water also absorbs heat and heats up, preheating in advance provides advantages for rapid temperature rise and deoxygenation in the deoxygenation head condition. The water vapor in the exhaust steam condenses and releases heat in the condenser to become condensed water, and the condensed water returns to the water storage tank of the deaerator by the pressure generated by its own water column; while the non-condensable gases such as oxygen in the exhaust steam are cooled , after cooling down to close to the demineralized water/demineralized water inlet temperature, it is continuously discharged out of the condenser through the non-condensable gas discharge and overflow holes.

If the condenser or the check valve fails during operation, the bypass valve and the exhaust valve can be opened, and the first emergency valve and the second emergency valve can be closed to deal with the failure without affecting the normal deoxygenation effect of the oxygen removal head.

The tube bundles in the condenser 8 are placed horizontally, and the baffle 29 of the condenser 8 is a single-bow vertical baffle, and a liquid opening 19 is opened at the bottom.

The liquid opening 19 is a fan-shaped hole with a radian of 90 degrees.

The spray cup 17 is provided with a number of spray holes 20, so that the condensed water enters the water storage tank in the form of sprayed thin lines, which increases the contact area with the heating steam for rapid heating and deoxidation.

The height difference between the condensed water outlet 11 of the condenser and the condensed water inlet 30 of the water storage tank is 2 meters.

The height difference between the condensed water outlet 11 of the condenser and the condensed water inlet 30 of the water storage tank is 3 meters.

The height difference between the condensed water outlet 11 of the condenser and the condensed water inlet 30 of the water storage tank is 5 meters.

The height difference between the condensed water outlet 11 of the condenser and the spray cup 17 can take other values above 2 meters as required.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (7)

1. An energy-saving thermal deaerator, comprising a water storage tank (1) and a deaerator head (2), the water storage tank (1) has a heating steam inlet (4), an auxiliary heating steam inlet (31), a deaerator Oxygen water outlet (18) and the first safety valve (3), the deoxygenation head (2) is provided with make-up water inlet (15), exhaust valve (5) and second safety valve (21); characterized in that, It also includes a condenser (8), on which non-condensable gases such as oxygen are discharged and condensed water overflow holes (9), exhaust steam inlet (10), condensed water outlet (11), Water inlet (12) and water outlet (13); the water storage tank (1) has a condensed water inlet (30), and a spray cup (17) is installed at the condensed water inlet (30); the condenser The water outlet (13) is connected to the feed water inlet (15) of the deaeration head through the water outlet pipeline (22), and the water outlet pipeline (22) is provided with a control valve; the condensed water outlet (11) It is connected to the condensed water inlet (30) through the condensed water pipeline (23), and the condensed water pipeline (23) is provided with a check valve (16) and a first emergency valve (7); the water inlet ( 12) It is connected to the desalted water/softened water supply pipeline (24), and the desalted water/softened water supply pipeline (24) is provided with a control valve; the supply water inlet (15) of the deaeration head The bypass pipeline (25) is connected with the desalted water/softened water supply pipeline (24), and the bypass pipeline (25) is provided with a bypass valve (14); the exhaust steam discharge valve (5 ) outlet is connected to the exhaust steam inlet (10) of the condenser through the connecting pipeline (26), and the second emergency valve (27) is arranged on the connecting pipeline (26); the exhaust steam discharge valve The outlet of (5) is connected to the evacuation pipeline (28), the evacuation pipeline (28) is provided with an evacuation valve (6), and the condensed water outlet (11) of the condenser is located at the storage Above the condensed water inlet (30) of the water tank, the height difference between the condensed water outlet (11) of the condenser and the condensed water inlet (30) of the water storage tank is greater than or equal to 2 meters. 2. The energy-saving thermal deaerator according to claim 1, characterized in that the tube bundles in the condenser (8) are placed horizontally, and the baffles (29) of the condenser (8) are The single-bow vertical baffle has a liquid opening (19) at the bottom. 3. The energy-saving thermal deaerator according to claim 2, characterized in that, the liquid opening (19) is a fan-shaped hole with a radian of 90 degrees. 4. The energy-saving thermal deaerator according to claim 1, characterized in that there are several spray holes (20) on the spray cup (17). 5. The energy-saving thermal deaerator according to claim 1, characterized in that the height difference between the condensed water outlet (11) of the condenser and the condensed water inlet (30) of the water storage tank is 2 meters. 6. The energy-saving thermal deaerator according to claim 1, characterized in that the height difference between the condensed water outlet (11) of the condenser and the condensed water inlet (30) of the water storage tank is 3 meters. 7. The energy-saving thermal deaerator according to claim 1, characterized in that the height difference between the condensed water outlet (11) of the condenser and the condensed water inlet (30) of the water storage tank is 5 meters.

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