CN2086365U - No-pressure hot-water boiler - Google Patents

Abstract

The utility model relates to a no-pressure hot-water boiler which is composed of a combustion system and a gas-liquid type heat exchanger with vacuum phase transition. The combustion system comprises a boiler body, a fire grate, a fire door, a fire wall, etc. The heat exchanger is composed of a closed container, an evaporator, a condenser and an exhaust valve and is arranged on the top part of the boiler body. The heating surface of the boiler is composed of the bottom surface of the closed container and the smoke tube of the evaporator. The fire and smoke passage is in a double-backhaul which scours the heating surface of the container bottom and the smoke tube and starts the heat exchanger with vacuum phase transition to work. The utility model has the advantages of reasonable structure, low cost, high thermal efficiency, safety, etc.

Description

No-pressure hot-water boiler

The utility model relates to a kind of unpressurized hot water boiler who is made up of gas one liquid formula vaccum phase conversion heat exchanger and combustion system, belongs to heating equipment.

A kind of unpressurized hot water boiler is disclosed in CN89203567, it is on existing hot-water boiler, increase by one and can eliminate pressure in the boiler, the control water level also can relax the multipurpose water tank of impulse force when having a power failure suddenly, its weak point is that boiler has increased an additional facilities, increased equipment cost, and to not contribution of boiler thermal output.

It is a kind of simple in structure that the purpose of this utility model is to provide, and operational administrative is easy, and cost is low, the thermal efficiency is high and can not have the hot-water boiler that pressure is moved.

Technical solution of the present utility model is: the unpressurized hot water boiler who is made up of the gentle liquid formula vaccum phase conversion heat exchanger of combustion system, wherein combustion system comprises body of heater 15, casting furnace grate 10, throw coal stove door 9, ash door 11, the gas-liquid type vaccum phase conversion heat exchanger comprises closed container 1, evaporimeter 7, condenser 3 and air bleeding valve 20, it is characterized in that, the evaporimeter 7 be made up of a branch of smoke pipe and orifice plate and the condenser 3 of logical recirculated water are installed in the closed container 1, condenser 3 places the top of evaporimeter 7, air bleeding valve 20 is installed at the top of closed container 1, the top that closed container 1 is installed in body of heater 15 makes its bottom surface become the end face of body of heater 15, two parts before and after wall with flues 13 is divided into body of heater 15 inner spaces, its front portion is divided into combustion chamber 8 and dedusting chamber 12, and the wall with flues rear portion is a dust-settling compartment 14.The upper back of dust-settling compartment 14 communicates with the mouth 16 that advances of evaporimeter 7, leaves from the combustion chamber the 8 fiery cigarette channels 22 that lead to dust-settling compartment 14 between the bottom surface of the end face of wall with flues 13 and closed container 1.

In the present technique solution, closed container 1 is made up of cooling cylinder 2 and evaporation tank 5, evaporation tank 5 and cooling cylinder 2 are the closed containers 1 that connect into UNICOM by steam connection pipe 4, evaporimeter 7 is installed in the evaporation tank 5, condenser 3 is installed in the cooling cylinder 2, air bleeding valve 20 is installed in the top of cooling cylinder 2, and evaporation tank 5 places the top of body of heater 15, makes its bottom surface become the end face of body of heater 15.

When the utility model uses, add the smoke pipe of working-medium water in the closed container 1 to the submergence evaporimeter, open air bleeding valve 20, the intake-outlet of condenser 3 by water circulating pump be connected with hot system, the fiery cigarette of combustion chamber is under the effect of wall with flues, and the bottom surface of at first washing away the top of combustion chamber closed container is then by fiery cigarette channel 22.Through dust-settling compartment 14, enter smoke pipe from the gas approach 16 of evaporimeter, lead to chimney 26 emptyings from exhanst gas outlet 6 at last.Working-medium water in the closed container 1 is heated to boiling,,, opens circulating pump and promptly begins heat supply closing air bleeding valve 20 after the air emptying in the container from air bleeding valve 20 exhausts by steam pressure.

The utility model is when work, owing to do not have incondensable gas in the closed container, be that the air dividing potential drop is zero, boiling vaporization under negative pressure after working-medium water is heated, steam arrives condenser and is condensed into water, the latent heat of emitting is passed to recirculated water in the condenser, and condensed water is subjected to thermal evaporation by gravity reflux again to container bottom.By phase-change heat transfer, its thermal resistance is very little in vacuum airtight container for working-medium water like this, and the ability of transmission heat is very big and as long as can guarantee enough condensing heat-exchange areas, can guarantee that closed container works under negative pressure, does not promptly have pressure and moves.In the combustion system of the present utility model, only at the burner hearth end face heat-absorbent surface is arranged, other three are not all had the cold water wall, thus fire box temperature than higher, sufficient combustion is fit to burn low calorific value coal; It is preceding through bigger dust-settling compartment dedusting that flue gas enters smoke pipe, and smoke pipe is difficult for long-pending crock.In service, as long as water circulating pump does not stop, boiler moves under negative pressure all the time, can guarantee security of operation, simple and convenient management.So the utlity model has simple in structurely, cost is low, and is easy and simple to handle, guarantees safety, the characteristics that the thermal efficiency is high.

Following accompanying drawing has been described an embodiment of the present utility model, below in conjunction with accompanying drawing the utility model is described in detail.

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

Fig. 2 is an A-A profile among Fig. 1.

Fig. 3 is a perspective view of the present utility model.

Closed container 1 is made up of cooling cylinder 2 and evaporation tank 5 among the figure.They be by roll of steel plate around cylinder and end cap be welded, the end cap of evaporation tank 5 is made orifice plate.A branch of smoke pipe in the evaporation tank 5, its two ends and orifice plate are welded into the evaporimeter 7 of tube plate structure, 16 is its smoke inlet, 6 is its exhanst gas outlet, condenser 3 is installed in the cooling cylinder 2, it is to be made by steel pipe or copper pipe, its form can be got the straight tube of many backhauls, preferably adopt the wife to manage, the coiled tube condenser 3 that adopts copper pipe to reel and form in the present embodiment, 17,18 is the recirculated water import and export of condenser 3, and evaporation tank 5 and cooling cylinder 2 join the closed container 1 that pipe 4 connects into UNICOM by steam, and the top of cooling cylinder 2 is equipped with air bleeding valve 20, body of heater 15 is to build by laying bricks or stones with common refractory brick and alumina cement to be aided with steelframe and to reinforce and to form, evaporation tank 5 be installed in body of heater 15 above, it is to be supported on the body of heater both walls by the support 24 that is welded on its both sides, makes the bottom surface of evaporation tank 5 become the end face of body of heater 15.Wall with flues 13 is to be built into refractory brick, two parts before and after it is divided into body of heater 15 inner spaces, its front portion is combustion chamber 8 and dirt pocket 12, wherein 10 is that casting furnace grate 9 is for throwing coal stove door, 11 are the ash disposal fire door, wall with flues 13 rear portions are dust-settling compartment 14, and the mouth 16 that advances of dust-settling compartment upper back and evaporimeter communicates and leaves from the combustion chamber the 8 fiery cigarette channels 22 that lead to dust-settling compartment 14 between the end face of wall with flues 13 and evaporation tank 5 bottom surfaces.In the present embodiment, two passages about fiery cigarette channel 22 is divided into, to make full use of evaporation tank bottom heating surface, for extended surface welds some fins 23 in the evaporation tank bottom surface, its trend is consistent with flue gas flow direction.For monitoring the pressure in the container and guaranteeing safety, vacuum meter 21 and safety valve 19 have been installed at the cooling cylinder top, and all topped one deck heat-insulation layer 25,26 in the exposed aerial surface of cooling cylinder 2 and evaporation tank 5 is a chimney, present embodiment after tested, thermic load is 84 * 10 ⁴KJ/h, hot water temperature are 95 ℃, and operating pressure is-1.96 * 10 ⁴～0Pa, the thermal efficiency are 75%.

Claims (4)

1, a kind of unpressurized hot water boiler, comprise combustion system and gas-liquid type vaccum phase conversion heat exchanger, wherein combustion system is by body of heater 15, casting furnace grate 10, throw coal stove door 9, ash door 11 is formed, the gas liquid type vaccum phase conversion heat exchanger, by closed container 1, evaporimeter 7, condenser 3 and air bleeding valve 20 are formed, it is characterized in that being equipped with in the closed container 1 evaporimeter 7 formed by a branch of parallel smoke pipe and orifice plate and the condenser 3 of logical recirculated water, condenser 3 places the top of evaporimeter 7, air bleeding valve 20 is installed at the top of closed container 1, the top that closed container 1 is installed in body of heater 15 makes its bottom surface become the end face of body of heater 15, two parts before and after wall with flues 13 is divided into body of heater 15 inner spaces, its front portion is combustion chamber 8 and dirt pocket 12, its rear portion is a dust-settling compartment 14, the upper back of dust-settling compartment communicates with the mouth 16 that advances of evaporimeter 7, leaves from the combustion chamber the 8 fiery cigarette channels 22 that lead to dust-settling compartment 14 between the end face of wall with flues 13 and closed container bottom surface.

2, according to the described unpressurized hot water boiler of claim 1, it is characterized in that described closed container 1 is made up of cooling cylinder 2 and evaporation tank 5, cooling cylinder 2 and evaporation tank 5 are the closed containers 1 that connect into UNICOM by steam connection pipe 4, evaporimeter 7 is installed in the evaporation tank 5, condenser 3 is installed in the cooling cylinder 2, air bleeding valve 20 is installed in the top of cooling cylinder, and evaporation tank 5 places the top of body of heater 15, makes its bottom surface become the end face of body of heater 15.

3, unpressurized hot water boiler according to claim 1 and 2 is characterized in that described condenser 3 is to be made by coil pipe or many backhauls straight parallel pipe.

4,, it is characterized in that the bottom of closed container 1 or evaporation tank 5 is equipped with fin 23 according to claim 1 or 2 described unpressurized hot water boilers.

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