Features and Benefits
| BHR-S and BHR-M Series (High Pressure Steam Applications) | BHR-LPS Series (Low Pressure Steam Applications) |
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Integrated System Automatically Adjusts to Changing Demands:
Recovers 90% of heat normally lost,
Automatically controls surface blowdown flow to maintain the desired concentration of dissolved solids within the boiler,
Automatically controls boiler dissolved solids.
Compact Size for Convenient Placement:
Reduced installation costs.
Removable Shell for Easy Inspection and Cleaning:
Reduces maintenance costs.
Significant Fuel Savings for Any Size Boiler: It transfers the blowdown heat to the make-up, thereby decreasing fuel costs.
Saves chemical costs by reducing blowdown.
Blowdown is Cooled Before Discharging Into the Sewer:
Complies with discharge water codes.
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Blowdown Flow Concurrent With and Proportional to Make-up Flow:
Higher heat transfer, greater efficiency.
Each Boiler Has Its Own Heat Exchanger, Sample Valve, Throttling Valve, and Make-Up Flow Switch:
Easier to adjust and monitor each boiler individually.
Level of Dissolved Solids or Specific Conductance Can Be Adjusted:
Prevents foaming, priming or scaling without wasting excess energy.
Packaged for Easy Installation:
Saves money on installation costs.
Cools Blowdown Before Discharging Into Sewer:
Helps comply with local codes on high temperature liquids to drain without adding cooling water to drain.
Specifically Designed for Low Pressure Boiler Applications:
No need to modify or redo high pressure systems to try and make them work in a low pressure application.
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Product Offering
BHR-S and BHR-M Series Continuous boiler surface blowdown is the most effective method of purging destructive solids from any steam boiler system. However, this protective procedure also results in a constant and costly heat loss, unless a blowdown heat recovery system is used.
Cleaver-Brooks blowdown/heat recovery systems adjust automatically to changing system demands, and recover 90% or more of the heat normally lost during boiler surface blowdown operation.
The blowdown/heat recovery systems will usually result in a payback in a few short months from fuel savings alone.
The Cleaver-Brooks Packaged Blowdown Heat Recovery System serves two primary functions.
- It automatically controls the surface blowdown to maintain the desired level of total dissolved solids (TDS) in the boiler, reducing the amount of blowdown to a minimum.
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It recovers the heat from the high temperature blowdown, and transfers it to the incoming cold make-up water, maximizing boiler efficiency. Use of BHR also improves deaerator efficiency by reducing surges caused by adding large amounts of cold make-up water to the system.
The control valve within the unit performs two functions. The valve senses the flow of make-up, and positions itself to maintain the desired ratio of blowdown and make-up flows. As a result, the dissolved solids concentration within the boiler is maintained automatically.
The proportioning control also provides for very effective heat recovery since hot blowdown flows only when there is a corresponding flow of cold water (make-up).
Model BHR-M Systems for multiple boiler installations include a flow control valve for each boiler. This allows for proportioning the overall system blowdown between different boilers, which may be operating at different loads. A strainer and sampling valve are also provided for each boiler, with a sample cooler mounted on the system. Thus, all boilers can be sampled at one convenient location.
The heavy duty blowdown heat exchangers are uniquely designed to handle the blowdown on the tube side. This allows many tube side passes, which ensures maximum heat transfer, and maintains high fluid velocities preventing scaling and fouling. Due to the severe service, tubes are stainless steel, and because of the abrasive nature of the fluid, return bends are fabricated of extra thick material. Since vibration is a common problem with blowdown exchangers, hold down devices are provided to clamp the tube bundle in place.
Each system is equipped with a blowdown outlet thermometer so that performance can be monitored. By logging data regularly, a cleaning schedule can be established for each exchanger.
BHR-LPS Series
Cleaver-Brooks Model BHR-LPS systems are designed for boilers operating up to 30 psig and features a brazed plate exchanger - dedicated to each boiler - up to a maximum of three boilers. The plate exchanger is designed to improve thermal exchange efficiency. The BHR-LPS also features an on/off flow switch that is synchronized to each boiler feed pump.
The BHR-LPS includes plate exchanger, on/off flow switch, outlet thermometer and interconnecting piping.
BHR-LPS Selection
- Make-up = minimum flow (total - all boilers) - 3-1/2 gpm (The make-up valve to feedwater tank should be on/off type to ensure minimum 3-1/2 gpm flow).
- Maximum flow (each boiler) - 15 gpm.
- Maximum pressure - 65 psig.
- Blowdown, maximum flow (each boiler) - 3 gpm
- Design pressure -30 psig at 274 °F
